May 25, 2023

7:30 a.m. Pacific Daylight Time

www.virtualshareholdermeeting.com/RIGL2023

You are receiving these proxy materials from us because you own shares of common stock (“Common Stock”) of Rigel Pharmaceuticals, Inc., a Delaware corporation (“Rigel,” the “Company,” “we” or “us”), as of March 27, 2023, the record date (the “Record Date”) for Rigel’s 2023 Annual Meeting of Stockholders (the “Annual Meeting”). The Company’s Board of Directors (the “Board of Directors” or the “Board”) has made these materials available to you in connection with the Board’s solicitation of proxies for use at the Annual Meeting. You may vote by proxy over the Internet or by phone, or by mail if you requested printed copies of the proxy materials.

Pursuant to rules adopted by the Securities and Exchange Commission (the “SEC”), we have decided to provide access to our proxy materials to our

stockholders via the Internet. Accordingly, we are sending only a Notice of Internet Availability of Proxy Materials (the “Notice”) to our stockholders of record and posting our proxy materials online at www.proxyvote.com. The Notice contains only an overview of the complete proxy materials available. Stockholders are encouraged to access and review all the proxy materials on the website or request a paper or electronic copy of the full set of proxy materials for review prior to voting. Instructions on how to access the proxy materials over the Internet or to request a paper or electronic copy of the full set of the proxy materials may be found in the Notice. We intend to mail the Notice on or about April 14, 2023 to all stockholders of record as of the Record Date who are entitled to vote at the Annual Meeting.

No, you will not receive any other proxy materials by mail unless you request a paper copy of proxy materials. This proxy statement and Rigel’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022 are available at www.proxyvote.com. To request that a full set of the proxy materials be sent to your specified postal or email address, please request as follows:

Please have your proxy card in hand when you access the website or call and follow the instructions provided.

The Annual Meeting will be held virtually on Thursday, May 25, 2023 at 7:30 a.m. local time via a live webcast at www.virtualshareholdermeeting.com/RIGL2023. Online check-in will begin at 7:00 a.m. local time and you should allow ample time for the check-in procedures.

Instructions on how to attend and participate virtually in the Annual Meeting are available by visiting www.virtualshareholdermeeting.com/RIGL2023. You will not be able to attend the Annual Meeting in person.

Information on how to vote online during the Annual Meeting is discussed below. Stockholders as of the Record Date may vote and submit questions via the Internet at the Annual Meeting. We encourage you to access the meeting prior to the start time. If you

encounter any difficulties accessing the virtual Annual Meeting during the check-in or meeting time, please call the technical support number that will be posted on the Virtual Shareholder Meeting log-in page. In order to enter the Annual Meeting, you will need the 16-digit control number provided in the Notice or on your proxy card if you are a stockholder of record as of the Record Date.

A legal proxy is not required to attend the Virtual Shareholder Meeting. If you did not receive a 16-digit control number, because you are a beneficial owner, and your shares are held in a “street name” through an unaffiliated broker, bank or other nominee, you may attend as a guest, but in order to participate in the virtual Annual Meeting you must have your 16-digit control number.

Our virtual Annual Meeting allows stockholders to submit questions and comments before and live during the virtual Annual Meeting, beginning at the check-in time, 7:00 a.m. local time. You may submit questions before the virtual Annual Meeting at www.virtualshareholdermeeting.com/RIGL2023. During the virtual Annual Meeting, you may only submit questions in the question box provided at the online meeting center at the website noted above. In

both cases, stockholders must have available their 16-digit control number provided in the Notice or your proxy card (if you received a printed copy of the proxy materials). To the extent time does not allow us to answer all of the appropriately submitted questions, we will answer them in writing on the Investor Relations section of our website at www.rigel.com, soon after the meeting.

We will have technicians ready to assist you with any technical difficulties you may have accessing the virtual meeting website. If you encounter any difficulties accessing the virtual Annual Meeting during

the check-in or meeting time, please call the technical support number that will be posted on the Virtual Shareholder Meeting log-in page.

You may vote your shares electronically before the virtual Annual Meeting by Internet, or by telephone or by mail as described below. You do not need to attend the virtual Annual Meeting to vote if you submitted your vote by Internet, by telephone or by mail in advance of the virtual Annual Meeting.

The virtual Annual Meeting will be archived for one year after the date of the virtual Annual Meeting at www.virtualshareholdermeeting.com/RIGL2023.

We have determined that the Annual Meeting will be held in a virtual meeting format only via the Internet, with no physical in-person meeting. Conducting the Annual Meeting virtually allows for remote participation regardless of local access or restrictions and increases the opportunity for all stockholders to participate and communicate their views to a much wider audience.

Additionally, we use software that verifies the identity of each participating stockholder and ensures during the

question-and-answer portion of the meeting that they are granted the same rights they would have at an in-person meeting. We may consider a change in our virtual-only meeting practice in the future. Given the above listed factors, we feel a virtual-only meeting is the right choice for Rigel and its stockholders at this time.

Only stockholders of record at the close of business on the Record Date, March 27, 2023, are entitled to notice of, and to vote at, the virtual Annual Meeting or

any adjournment or postponement thereof. As of the Record Date, there were 173,653,353 shares of Common Stock outstanding and entitled to vote.

If, on the Record Date, your shares were registered directly in your name with our transfer agent, EQ Shareowner Services, then you are a stockholder of record. As a stockholder of record, you may vote online at the meeting or vote by proxy. Whether or not you plan to attend the virtual Annual Meeting, we urge you to fill out and return the proxy card or vote by proxy over the telephone or on the Internet as instructed below, to ensure your vote is counted. We must receive any proxy cards that will not be voted online at the Annual Meeting, or proxies submitted telephonically or over the Internet, no later than 11:59 P.M. Eastern Time on May 24, 2023.

Stockholders who attend the virtual Annual Meeting should follow the instructions at www.virtualshareholdermeeting.com/RIGL2023 to vote during the virtual Annual Meeting. A complete list of stockholders entitled to vote at the virtual Annual Meeting will be available for examination for any reason germane to the Annual Meeting at Broadridge Financial Solutions at VSMShareholderList@Broadridge.com for a period of ten (10) days prior to the virtual Annual Meeting, and will be available on the virtual meeting site at www.virtualshareholdermeeting.com/RIGL2023.

If, on the Record Date, your shares were not held in your name, but rather in an account at a brokerage firm, bank, dealer, or other similar organization, then you are the beneficial owner of shares held in “street name” and the Notice is being forwarded to you by that organization. The organization holding your account is considered to be the stockholder of record for purposes of voting at the Annual Meeting. As a beneficial owner, you have the right to direct your

broker or other agent on how to vote the shares in your account. You are also invited to attend the Annual Meeting virtually. However, since you are not the stockholder of record, you may not vote your shares or ask questions online at the Annual Meeting unless you request and obtain a valid proxy from your broker or other agent and deliver that proxy to us prior to the virtual Annual Meeting, as described below under the section “How Do I Vote”.

The following matters are scheduled for a vote at the Annual Meeting:

The Board recommends “FOR” all of the director nominees in Proposal No. 1, “FOR” Proposal No. 2, “ONE YEAR” for Proposal No. 3, and “FOR” Proposal Nos. 4 and 5.

The Board knows of no other matters that will be presented for consideration at the Annual Meeting. If any other matters are properly brought before the Annual Meeting, it is the intention of the persons named in the accompanying proxy to vote on those

matters in accordance with their best judgment. This includes, among other things, considering any motion to adjourn the virtual Annual Meeting to another time and/or place, including for the purpose of soliciting additional proxies for or against a given proposal.

You may either vote “For” all the nominees to the Board or you may “Withhold” your vote for any nominee you specify. For the other matters to be voted on, you may either vote “For” or “Against” or abstain from voting or, in the case of the proposal regarding

the frequency of stockholder advisory votes on executive compensation, “one year”, “two years”, “three years” or “abstain”. The procedures for voting are fairly simple:

If you are a stockholder of record, you may vote using one of the following methods:

Whether or not you plan to attend the virtual Annual Meeting and vote online, we urge you to vote by proxy to ensure your vote is counted. You may still attend the Annual Meeting and vote online even if you have already voted by proxy.

If you are a beneficial owner of shares registered in the name of your broker, bank, or other agent, you should have received the Notice containing voting instructions and a 16-digit control number from that organization rather than from Rigel. Simply follow the voting instructions in the Notice to ensure that your vote is counted. Alternatively, you may vote by telephone or over the Internet as instructed by your broker or bank. If you did not receive a Notice with a 16-digit control number, because your shares are held in a “street name” through an unaffiliated broker, bank

or other nominee, in order to vote in the virtual Annual Meeting, you must obtain a your 16-digit control number by submitting a legal proxy from your broker, bank or other nominee to Broadridge Financial Solutions. You may contact your broker or bank for instructions and to request a proxy form.

Please see the Notice or the information your bank, broker, or other holder of record provided you for more information on these proxy voting options.

We provide Internet voting to allow you to vote your shares online, with procedures designed to ensure the authenticity and correctness of your voting instructions. However, please be aware that you must

bear any costs associated with accessing the Internet, such as usage charges from Internet access providers and telephone companies.

If you are a stockholder of record and do not vote by completing your proxy card, by telephone, through the Internet or online during the virtual Annual Meeting, your shares will not be voted.

If you return a signed and dated proxy card without marking any voting selections, your shares will be voted: (a) “For” Proposal No. 1 (Election of Directors); (b) “For” Proposal No. 2 (Amendment to the Amended 2018 Plan); (c) for “one year” as the preferred

frequency of advisory votes to approve executive compensation for Proposal No. 3; (c) “For” Proposal No. 4 (Advisory Vote on Executive Compensation); and (d) “For” Proposal No. 5 (Ratification of Auditors). If any other matter is properly presented at the Annual Meeting, your proxyholder (one of the individuals named on your proxy card) will vote your shares using his or her best judgment.

If you are a beneficial owner and do not instruct your broker, bank, or other agent how to vote your shares, the question of whether your broker or nominee will still be able to vote your shares depends on whether the particular proposal is deemed to be a “routine” matter under applicable rules. Brokers and nominees can use their discretion to vote “uninstructed” shares with respect to matters that are considered to be “routine,” but not with respect to “non-routine” matters.

In this regard, Proposal Nos. 1, 2, 3 and 4 are considered to be “non-routine” under the applicable

rules, meaning that your broker may not vote your shares on those proposals in the absence of your voting instructions. However, Proposal No. 5 is considered to be a “routine” matter under the applicable rules, meaning that if you do not return voting instructions to your broker by its deadline, your shares may be voted by your broker in its discretion on Proposal No. 5.

As discussed above, when a beneficial owner of shares held in “street name” does not give instructions to the broker or nominee holding the shares as to how to vote on matters deemed by the applicable rules to be “non-routine,” the broker or nominee cannot vote

the shares. These unvoted shares are counted as “broker non-votes.” Proposal Nos. 1, 2, 3 and 4 are considered to be “non-routine” under applicable rules and we therefore expect broker non-votes to exist in connection with those proposals.

We will pay for the entire cost of soliciting proxies. In addition to these proxy materials, our directors and employees may also solicit proxies by telephone or by other means of communication. We have hired Innisfree M&A Incorporated to act as our proxy solicitor in conjunction with the Annual Meeting. We will pay Innisfree M&A Incorporated a fee of $25,000,

plus reasonable out-of-pocket expenses, for these services. We will also reimburse brokerage firms, banks and other agents for the cost of forwarding proxy materials to beneficial owners. Directors and employees will not be paid any additional compensation for soliciting proxies.

If you receive more than one Notice, your shares are registered in more than one name or are registered in different accounts. Please follow the voting

instructions for each Notice that you receive to ensure that all of your shares are voted.

Yes. You can change or revoke your proxy at any time before the final vote at the virtual Annual Meeting in any one of three ways:

Please have your 16-digit control number provided to you in your proxy materials.

Votes will be counted by the inspector of election appointed for the Annual Meeting, who will separately count, for Proposal No. 1 to elect directors, votes “For,” “Against,” “Abstain” and broker non-votes; with respect to the proposal regarding frequency of stockholder advisory votes, votes “one year”, “two years”, “three years” and “Abstain”; and with respect to all other proposals, votes “For” and “Against,” abstentions and, if applicable, broker non-votes. For Proposal No. 1, a vote to “Abstain” will not have an effect in determining the election results. For each proposal except Proposal No. 1, a vote to

“Abstain” will be counted towards the vote total for each proposal and will have the same effect as “Against” votes for each proposal. Broker non-votes for Proposal Nos. 1, 2, 3 and 4 have no effect and will not be counted towards the vote total for any such proposal. Proposal No. 4 is considered to be a “routine” matter under applicable rules. Accordingly, if you hold your shares in a “street name” and do not provide voting instructions to your broker, bank or other agent that holds your shares, your broker, bank or other agent has discretionary authority under applicable rules to vote your shares on Proposal No. 5.

A quorum of stockholders is necessary to hold a valid Annual Meeting. A quorum will be present if stockholders holding at least a majority of the outstanding shares are present at the meeting or represented by proxy. On the Record Date, there were 173,653,353 shares outstanding and entitled to vote. Thus, the holders of 86,826,677 shares of Common Stock must be present or represented by proxy at the Annual Meeting to have a quorum. Your shares will be

counted towards the quorum only if you submit a valid proxy (or one is submitted on your behalf by your broker, bank or other nominee) or if you vote online at the Annual Meeting. Abstentions and broker non-votes will be counted towards the quorum requirement. If there is no quorum, the chairman of the meeting, or the holders of a majority of shares present online at the Annual Meeting or represented by proxy may adjourn the Annual Meeting to another date.

Preliminary voting results will be announced at the Annual Meeting. In addition, final voting results will be published in a report on Form 8-K that we expect to file within four business days after the Annual Meeting. If final voting results are not available to us in time to file

a Form 8-K within four business days after the meeting, we intend to file a Form 8-K to publish preliminary results and, within four business days after the final results are known to us, file an additional Form 8-K to publish the final results.

To be considered for inclusion in next year’s proxy materials, your proposal must be submitted in writing and must comply with all requirements of Rule 14a-8 promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), by December 16, 2023 to Rigel’s Corporate Secretary at 611 Gateway Boulevard, Suite 900, South San Francisco, California 94080. However, if Rigel’s 2024 Annual Meeting of Stockholders is not held between April 25, 2024 and June 24, 2024, then the deadline will be a reasonable time prior to the time Rigel begins to print and mail its proxy materials. If you wish to submit a proposal or nominate a director, not to be included in next year’s proxy materials, you must do so no earlier than the close of business on January 26, 2024 and no later than the close of business on February 25, 2024. However, if Rigel’s 2024 Annual Meeting of Stockholders is not held between April 25, 2024 and June 24, 2024, to be timely, notice by the stockholder must be received no earlier than the close of business on the 120th day prior to the 2024 Annual Meeting of Stockholders and not later than the close of business on the later of the 90th day prior to the 2024 Annual Meeting of Stockholders or the 10th day following the day on which public announcement of the date of the 2024 Annual Meeting of Stockholders is first made.

You are also advised to review our Amended and Restated Bylaws (“Bylaws”), which contain additional requirements about advance notice of stockholder proposals and director nominations. The chair of the 2024 Annual Meeting of Stockholders may determine, if the facts warrant, that a matter has not been properly brought before the meeting and, therefore, may not be considered at the meeting. In addition, the proxy solicited by the Board for the 2024 Annual Meeting of Stockholders will confer discretionary voting authority with respect to (i) any proposal presented by a stockholder at that meeting for which Rigel has not been provided with timely notice and (ii) any proposal made in accordance with Rigel’s Bylaws, if the 2024 proxy statement briefly describes the matter and how management’s proxy holders intend to vote on it, if the stockholder does not comply with the requirements of Rule 14a-4(c)(2) promulgated under the Exchange Act. In addition, to comply with the universal proxy rules (once effective), stockholders who intend to solicit proxies in support of director nominees other than Rigel’s nominees must provide notice that sets forth the information required by Rule 14a-19 under the Exchange Act no later than March 26, 2024.

The Board of Directors is divided into three classes. Each class has a three-year term. Vacancies on the Board may be filled only by persons elected by a majority of the remaining directors. A director elected by the Board to fill a vacancy in a class, including vacancies created by an increase in the number of directors, shall serve for the remainder of the full term of that class and until the director’s successor is elected and qualified.

The Board presently has eight members. Each of the nominees listed below are currently directors of the Company. If elected at the Annual Meeting, each of these nominees would serve until the 2026 annual meeting and until their successor is elected and has qualified, or sooner in the event of the director’s death, resignation or removal. It is Rigel’s policy to encourage directors and nominees for director to attend the Annual Meeting. All of our directors attended the 2022 Annual Meeting of Stockholders.

In a contested election, which is an election in which the number of nominees exceeds the number of directors to be elected, our directors will be elected by a plurality of the shares represented in person or by proxy and entitled to vote on the election of directors at that Annual Meeting. In a non-contested election involving incumbent directors, our Bylaws provide that, if the votes cast “For” an incumbent director nominee do not exceed the number of votes “Withheld”, the incumbent director will offer to tender his or her resignation to the Board. Broker non-votes are counted towards a quorum but are not counted for any purpose in determining whether a director nominee has been elected. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee of the Board will review the circumstances surrounding the “Withheld” vote and promptly make a recommendation to the Board on whether to accept or reject the resignation or whether other action should be taken. In making its decision, the Board will evaluate the best interests of Rigel and our stockholders and will consider all factors and relevant information. The Board will act on the Corporate Governance, Health Care Compliance Oversight and Nominating Committee’s recommendation and publicly disclose its decision, as well as the rationale behind it, within 90 days from the date of certification of the stockholder vote. The

director who tenders his or her resignation will not participate in the Corporate Governance, Health Care Compliance Oversight and Nominating Committee’s recommendation or the Board’s decision.

In the event that any nominee should become unavailable for election as a result of an unexpected occurrence, the proxies will be voted for the election of a substitute nominee or nominees proposed by the Corporate Governance, Health Care Compliance Oversight and Nominating Committee of the Board. Each person nominated for re-election has agreed to serve if re-elected, and the Board has no reason to believe that any nominee will be unable to serve on the Board if re-elected.

The Corporate Governance, Health Care Compliance Oversight and Nominating Committee seeks to assemble a board that, as a whole, possesses the appropriate balance of professional and industry knowledge, financial expertise and high-level management experience necessary to oversee and direct the Company’s business. To that end, the Corporate Governance, Health Care Compliance Oversight and Nominating Committee has identified and evaluated nominees in the broader context of the Board’s overall composition, with the goal of recruiting members who have diversity of personal and professional background, complement and strengthen the skills of other members and who also exhibit integrity, collegiality, sound business judgment and other qualities that the Board views as critical to effective functioning of the Board. Specifically, this has included engaging a professional consultant to identify diverse candidates meeting the Board’s criteria, and consideration of gender, social, underrepresentation, and cultural diversity in the Board’s and the Company’s long-term planning.

The brief biographies below include information, as of the date of this proxy statement, regarding the specific and particular experience, qualifications, attributes or skills of each director or nominee that led the Board to believe that the nominee should continue to serve on the Board. However, each member of the Board may have a variety of reasons why he or she believes a particular person would be an appropriate nominee for the Board, and these views may differ from the views of other members of the Board.

Rigel is committed to increasing the diversity of our Board of Directors. We believe that the mission of our company is best served by a Board of Directors that both fosters and embodies diversity in all its dimensions, including gender, social, and cultural diversity, and equally elevates voices from different

backgrounds and perspectives. Currently, in addition to the skills, attributes, and experience described below for each nominee and each director, our Board includes three female directors, one of whom is Black, and one director who is both Latinx and a member of the lesbian, bisexual, gay and transgender community.

The listing standards of The Nasdaq Stock Market LLC (“Nasdaq”) require that a majority of the members of a listed company’s Board of Directors qualify as “independent,” as affirmatively determined by the Board. The Board consults with our counsel from time to time to ensure that the Board’s determinations are consistent with relevant securities and other laws and regulations regarding the definition of “independent,” including those set forth in pertinent listing standards of Nasdaq. Consistent with these considerations, after review of all relevant identified transactions and relationships between each director, or any of his or her family members, and Rigel, our senior management and our independent registered public accounting firm, the Board has affirmatively

determined that all of our current directors are independent directors within the meaning of the applicable Nasdaq listing standards, except for Raul R. Rodriguez, our Chief Executive Officer who is not an independent director by virtue of his employment with the Company. Additionally, the former directors Bradford Goodwin and Keith Katkin, who served on the Board until the 2022 annual meeting of stockholders in May 2022 at which neither were nominated for reelection, were each independent during the period each of them served on the Board. In making this determination, the Board found that none of the directors or nominees for director determined to be independent by the Board had a material or other disqualifying relationship with Rigel.

The Board met six times during fiscal year 2022. All of our directors attended at least 75% of the aggregate number of meetings of the Board and the committees on which they served that were held during the period for which they were directors or committee members,

respectively. As required under applicable Nasdaq listing standards, in fiscal year 2022, Rigel’s independent directors met in executive session, at which only independent directors were present, at every regularly scheduled meeting of the Board.

Mr. Lapointe is currently the Chairman of the Board. The Chairman of the Board has authority, among other things, to call and preside over Board meetings, including meetings of the independent directors, to set meeting agendas and to determine materials to be distributed to the Board. Accordingly, the Board chair

has substantial ability to shape the work of the Board. The Board has no specific policy with respect to the separation of the positions of Board chair and Chief Executive Officer, and believes that separation of the positions represents an appropriate allocation of roles and responsibilities at this time.

One of the Board’s key functions is informed oversight of the Company’s risk management process. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee oversees enterprise risk assessment and management as a whole (which had previously been administered through the Board), and various standing committees oversee different aspects of risk management. It is the responsibility of the committee chairs to report findings regarding material risk exposures to the Board and the Corporate Governance, Health Care Compliance Oversight and Nominating Committee as quickly as possible. Both the Board as a whole and the various standing committees receive periodic reports, as well as incidental reports as matters arise, from Company management. The Board believes that its practices related to oversight of risk, including through delegation to various standing committees and sharing of information with the Board as a whole, is appropriate for the nature of the Company’s business. The Board has delegated to the General Counsel the responsibility of coordinating between the Board and management with regard to the determination and implementation of responses to any problematic risk management issues. The Board and management regularly consults with outside advisors to anticipate future risks, including its independent auditor, outside legal counsel and consultants.

Our standing committees address risks inherent to their respective areas of oversight taking into consideration the potential short-term or long-term timeframe in which the risk exists. Our Corporate Governance, Health Care Compliance Oversight and Nominating Committee (i) reviews and assesses the effectiveness of our corporate governance and healthcare compliance principles applicable to the Company and periodically recommends any changes deemed appropriate to the Board for its consideration, and periodically reviews

Company policy statements to determine their adherence to the Company’s Code of Conduct, (ii) periodically reviews and assesses the risk exposure of the Company including risks related to data privacy, technology and information security, including cyber-security, and back-up of information systems and makes recommendations to management pertaining to monitoring and minimizing findings in such assessment and (iii) has oversight responsibility to identify risks relating to the Company and health care compliance, to understand the plans to mitigate such risks, and to ensure the Board is aware of any issues related to the Company and health care compliance, and meets and communicates directly with the Chief Compliance Officer. Our Compensation Committee assesses and monitors whether any of our compensation policies and programs has the potential to encourage excessive risk-taking. Our Audit Committee manages risk pertaining to the Company’s major financial risk exposures, including reviewing the Company’s guidelines and policies related to such financial risks with management and the auditors and the steps taken by management to monitor and control these exposures.

Regarding the COVID-19 pandemic, company management has met to address concerns of our patients, employees, and the business, as well as updating and communicating with the full Board. The full Board has oversight and has been engaged concerning the monitoring and identification of risks to the Company, and actions the Company is taking to mitigate risks, including those related to the COVID-19 pandemic. Management has established a Crisis Management Team (“CMT”) that has implemented and continues to monitor our business continuity plans to prevent or minimize business disruption and ensure the safety and well-being of our personnel. The CMT has met to assess the effectiveness of our business continuity plans and make adjustments accordingly as risks evolve.

Our approach to environmental, social and governance (“ESG”) factors is consistent with our mission and our corporate values. We are committed to conducting our business in a safe and

environmentally sustainable manner that promotes the health of our employees, our patients, our community and the environment.

ESG oversight is exercised both at the Board level and through our executive leadership. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee has oversight responsibility over our ESG strategy and policies and is briefed by

management on matters related to ESG as appropriate. A wide range of departments are involved in our ESG strategy and work, including development, commercial, quality assurance, supply chain and human resources, among others.

We have a committee charged with overseeing Rigel's commitment to sustainability. We are committed to conducting our operations in an environmentally sound manner. Although we do not operate any manufacturing facilities, our South San Francisco headquarters are environmentally friendly. We moved our headquarters location from a space that was 81,000 square feet to 13,670 square feet, which reduced our use of water and electricity. As part of our move, we shifted towards becoming a paperless society. Our increased use of technology has enabled our employees to minimize the need to print and distribute paper documents, reducing the environmental impact of our business. Additionally,

prior to moving we closed our laboratories, thereby eliminating the generation of hazardous waste. We are committed to minimizing waste and conserving energy, resources, and landfill space. We have enhanced our commitment to reduce landfill waste and have introduced new goals focused on addressing plastic waste from our operations, and recycling, where possible. In light of the potential impact our business may have on the environment, we have set goals and adopted a number of internal policies and management systems designed to eliminate waste and reduce water and energy consumption.

We are committed to supporting the mental health and wellness of our employees. We offer a long-established Employee Assistance Program. This program provides stress management, mental health, emotional, resiliency and support to our colleagues. Furthermore, our Mind and Body Wellness Committee provides education, tools, networking opportunities and other resources to

help foster and grow the overall wellbeing of employees. We have a long-established Commuter Benefit Program to encourage our employees to use public transit by enabling employees to use pre-tax dollars to pay for public transit costs. Additionally, this program promotes the use of carpooling, as well as bicycling to our headquarters.

During 2022, we continued to focus on the evolving pandemic situation as guided by health authorities to protect the health and safety of our workforce. We continue to maintain cleaning frequencies, using U.S. Environmental Protection Agency-registered disinfectants, with an increased focus on all high traffic and high-touch areas. We have implemented a system for immediately activating contact outreach and enabling working from home for those colleagues who may be affected. Additionally, we follow occupational health and safety guidelines in our day-to-day operations, including safety training, and an open-door policy for injury

reporting. In 2023, we will continue to take appropriate health and safety measures as we continue to evolve our hybrid schedule. We are committed to employee learning and recognize that development and training programs lead to enhanced skills which in turn bolster employee confidence. Our commitment to the professional development of our employees includes providing various training or professional development programs as well as encouraging the attendance of educational conferences. We monitor employee satisfaction or engagement through various methods including companywide surveys.

We strive to be an inclusive, diverse, and safe workplace with opportunities for our employees to grow and develop in their careers, supported by competitive compensation, opportunities for equity ownership, development opportunities that enable continued learning and growth and employment packages that promote well-being across all aspects of our employees’ lives, including health care, retirement planning and paid time off. At the Board level, our Board includes three female directors, one of whom is Black, and one director who is both Latinx and a member of the lesbian, bisexual,

gay and transgender community. Our Board meets the current diversity requirements specified under California law and it is our expectation we will continue to meet such requirements in future periods. At the management level, we are committed to maintaining diversity of our leadership throughout the organization. We are an affirmative action and equal opportunity employer, and all qualified applicants receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristics protected by law.

We are committed to good corporate governance and to conduct our business in an ethical manner. We have adopted numerous policies and guidelines to facilitate legal and ethical conduct, including our Code of

Conduct, and to further align the interests of our employees and directors with our stockholders and other key stakeholders, including the patients we serve.

We are committed to maintaining the highest standards of legal and ethical conduct and to reflect our corporate values. We expect our vendors, consultants and third party service suppliers related to our sales and marketing activities (“Third Parties”) to demonstrate a similar commitment to legal and ethical business practices. Our Code of Conduct applies to Third Parties as well as our officers, directors and employees, and conveys our

minimum expectations for such Third Parties to: (i) operate in full compliance with all applicable legal and regulatory requirements, (ii) conduct business ethically and act with integrity and (iii) adhere to health care industry standards, including Company policies about business transactions, and generally foster a culture that values integrity and promotes “doing the right thing.”

We are committed to conducting business in an ethical and responsible manner. This includes respecting internationally recognized human rights throughout our business. We demonstrate human rights in our employment practices, including non-discrimination,

diversity and inclusion, minimum age requirements, freedom of association and fair compensation policies. We further demonstrate our dedication to human rights in the commitment to providing a healthy, safe, and secure workplace.

The policies that govern our clinical trials help ensure that each trial is planned, conducted and monitored in accordance with scientific, ethical and clinical standards. As we work to develop new therapies for the patients we serve, our strict standards of moral and ethical conduct are guided with the help and oversight of institutional review boards, ethics committees, regulatory authorities and medical and industry association guidelines governing ethical clinical trial conduct. Prior to the human

experimentation of our products, and to protect the safety and well-being of human participants, we obtain independent third-party verification (ethical committees’ approval) for conducting the clinical research. All Company sponsored studies are conducted in accordance with applicable laws and regulations, as well as principles derived from relevant international standards, including but not limited to the Helsinki Declaration.

We are committed to the responsible and transparent use of personal data entrusted to us by patients, employees and others. We maintain policies that guide how we collect, maintain and protect personal data taking into account relevant legal and regulatory requirements of the many territories where we do business. Examples of the practices we follow to help

ensure the integrity of our data protection processes include collecting and using the minimum amount of personal data necessary to achieve our business purposes; sharing personal data only with individuals who have a legitimate need for it and will protect it;

The Board has five standing committees: an Audit Committee, a Compensation Committee, a Finance Committee, a Corporate Governance, Health Care Compliance Oversight and Nominating (or Corp. Gov., Hecco., & Nom.) Committee and a Scientific and

Clinical Trial Advisory Committee. The following table provides current membership and meeting information for fiscal year 2022 for each of the Board committees:

Below is a description of each standing committee of the Board. Each of the committees has authority to engage legal counsel or other experts or consultants, as it deems appropriate, to carry out its responsibilities. The Board has determined that each member of each committee meets the applicable

Nasdaq rules and regulations regarding “independence” and that each member is free of any relationship that would impair his or her individual exercise of independent judgment with regard to the Company.

The Audit Committee of the Board of Directors was established by the Board in accordance with Section 3(a) (58)(A) of the Exchange Act to oversee Rigel’s corporate accounting and financial reporting processes and audits of our financial statements. The Audit Committee: evaluates the performance of and assesses the qualifications of the independent registered public accounting firm; determines and approves the engagement of the independent registered public accounting firm; determines whether to retain or terminate the existing independent registered public accounting firm or to appoint and engage a new

independent public registered accounting firm; reviews and approves the retention of the independent registered public accounting firm to perform any proposed audit, review and attest services and any permissible non-audit services; monitors the rotation of partners of the independent registered public accounting firm on Rigel’s audit engagement team as required by law; reviews and assesses the objectivity and independence of our independent registered public accounting firm; reviews the financial statements to be included in Rigel’s Annual Report on Form 10-K; discusses with management and the independent registered public accounting firm the

results of the annual audit and the results of Rigel’s quarterly financial statements; reviews with management the disclosure under “Management’s Discussion and Analysis of Financial Condition and Results of Operation” in the Company’s periodic reports filed with the SEC; confers with management and the independent registered public accounting firm regarding the effectiveness of internal controls over financial reporting; establishes procedures, as required under applicable law, for the receipt, retention and treatment of complaints received by the Company regarding accounting, internal accounting controls or auditing matters and the confidential and anonymous submission by employees of concerns regarding questionable accounting or auditing matters; reviews the results of management’s efforts to monitor compliance with Rigel’s programs and policies designed to ensure adherence to applicable laws and rules and Rigel’s Code of Conduct, including reviewing and approving related-party transactions. In addition, our Audit Committee has the responsibility to consider and discuss our major financial risk exposures and the steps our management has taken to monitor and control these exposures.

The following directors are currently members of the Audit Committee: Ms. Ali-Jackson, Ms. Wasman and Mr. Lapointe. Mr. Lapointe serves as Chair. The Audit Committee met nine times during fiscal year 2022. The

Audit Committee has adopted a written charter that is available to stockholders on our website at https://rigel.com/investors/corporate-governance/governance-documents.

The Board reviews the Nasdaq listing standards definition of “independence” for Audit Committee members on an annual basis and has determined that all members of Rigel’s Audit Committee are independent (as independence is currently defined in Rules 5605(c)(2)(A)(i) and (ii) of the Nasdaq listing standards). The Board has also determined that Mr. Lapointe qualifies as an “audit committee financial expert,” as defined in applicable rules and regulations promulgated by the SEC, and that Ms. Ali-Jackson and Ms. Wasman have the financial literacy skills necessary to satisfy the financial sophistication requirements of the Nasdaq listing standards. For each of Ms. Ali-Jackson, Ms. Wasman and Mr. Lapointe, the Board made a qualitative assessment of their individual levels of knowledge and experience, based on a number of factors, including their respective formal education and the fact that each is a former senior officer with financial oversight responsibilities, as well as Mr. Lapointe’s experience as a licensed certified public accountant and both a principal financial officer and a chief executive officer with financial oversight responsibilities.

The Compensation Committee of the Board of Directors acts on behalf of the Board to review, adopt and oversee Rigel’s compensation strategy, policies, plans and programs. The Compensation Committee: reviews and approves corporate performance goals and objectives relevant to the compensation of Rigel’s executive officers and other senior management; reviews and approves the compensation and other terms of employment of Rigel’s Chief Executive Officer; reviews and approves the compensation and other terms of employment of the other members of senior management; reviews and approves the compensation for Board members; administers Rigel’s stock option and stock purchase plans, bonus plans, deferred compensation plans and other similar programs; and reviews with management the Compensation Discussion and Analysis section of this proxy statement and considers whether to recommend that it be included in Rigel’s proxy statements and other filings. In addition, our Compensation Committee assesses and monitors whether any of our compensation policies and programs has the potential to encourage excessive risk-taking.

The following directors are currently members of the Compensation Committee: Dr. Moos, Ms. Ali-Jackson, and Mr. Lapointe. Dr. Moos serves as Chair. All members of Rigel’s Compensation Committee are independent (as “independence” is currently defined in Rule 5605(a)(2) of the Nasdaq listing standards). The Compensation Committee met four times during fiscal year 2022. The Compensation Committee has adopted a written charter that is available to stockholders on our website at: https://rigel.com/investors/corporate-governance/governance-documents.

Typically, the Compensation Committee meets at least quarterly and with greater frequency if necessary. The agenda for each meeting is usually developed by the Chair of the Compensation Committee, in consultation with a representative from management. In 2022, our Senior Vice President, Human Resources served as a representative of management. In addition, from time to time, various members of management and other employees, as well as outside advisors or consultants, may be invited by the Compensation Committee to make presentations, provide financial or other background information or advice, or otherwise participate in Compensation Committee meetings. The Chief Executive Officer may not participate in, or be present during, any deliberations or determinations regarding his compensation or individual performance

objectives. However, the Chief Executive Officer is consulted regarding any promotion or compensation decision affecting other members of management. The charter of the Compensation Committee grants the Compensation Committee full access to all books, records, facilities, and personnel of Rigel, as well as authority to obtain, at the expense of the Company, advice and assistance from internal and external legal, accounting or other advisors and consultants and other external resources that the Compensation Committee considers necessary or appropriate in the performance of its duties. In particular, the Compensation Committee has the authority to retain compensation consultants to assist in its evaluation of executive and director compensation, including the authority to approve the consultants’ reasonable fees and other retention terms.

During the last fiscal year, the Compensation Committee first engaged Radford and then changed its independent compensation consultant to Pearl Meyer to review and make recommendations regarding Rigel’s peer group, executive compensation and director compensation. References in this disclosure to the Compensation Committee’s independent compensation consultant include both Radford and Pearl Meyer during their applicable period of service during 2022. For more information regarding the market analysis used by the Compensation Committee to set executive compensation, please see “Competitive Market Review and Benchmarking” below.

Historically, the Compensation Committee has made most of the significant adjustments to annual compensation, determined bonus and equity awards, and recommended new performance objectives to the Board at one or more meetings generally held during the first and last quarters of the year. The Compensation Committee also considers, at various meetings throughout the year, matters related to individual compensation, such as compensation for new executive hires, as well as high-level strategic issues, such as the efficacy of Rigel’s compensation strategy, potential modifications to that strategy, and new trends, plans or approaches to compensation. Unanticipated circumstances can result in a promotion or a change to an individual’s compensation package. Generally, the Compensation Committee’s process comprises two related elements: the determination of compensation level and the establishment or recommendation of performance objectives for the current year. In the case of the Chief Executive Officer, the evaluation of

his performance is conducted by the Compensation Committee and, based upon that evaluation, the Compensation Committee either approves any adjustments to his compensation or makes a recommendation to our Board regarding any such adjustments to his compensation, as well as awards to be granted. For all executive officers and directors, as part of its deliberations, the Compensation Committee may review and consider, as appropriate, materials such as financial reports and projections, operational data, tally sheets that set forth the total compensation that may become payable to executive officers in various hypothetical scenarios, executive and director stock ownership information, company stock performance data, analyses of historical executive compensation levels and current Company-wide compensation levels, and recommendations of the

Compensation Committee’s independent compensation consultant, including analyses of executive and director compensation paid at other companies identified by the consultant or public information. The Compensation Committee referenced the peer group identified in the report of its independent compensation consultant in setting executive compensation and considering director compensation for 2022, as well as publicly available data provided by management on the executive and director compensation of the peer group identified.

The specific recommendations of the Compensation Committee with respect to executive and director compensation for fiscal year 2022 is described in greater detail in the “Compensation Discussion and Analysis” section of this proxy statement.

Members of our senior management, including our Chief Executive Officer, Chief Financial Officer, and Senior Vice President, Human Resources, with oversight by the Compensation Committee, conducted an assessment of our compensation programs and policies to determine whether the incentives provided by these programs and policies were appropriate or had the potential to encourage excessive risk-taking by employees.

The assessment focused on the key terms of the Company’s equity compensation and variable cash incentive compensation programs, such as the cash incentive plans. Our compensation programs were analyzed to determine whether they introduced or encouraged excessive risk-taking or other behaviors that could have an adverse impact on our business and whether existing risk mitigation features were sufficient in light of the overall structure and composition of our compensation programs. In particular, the assessment focused on the ability of participants to affect the level of the variable component of their compensation and the controls over participant action and variable compensation. Specific features of our compensation plans and programs identified during the assessment process as discouraging or potentially mitigating excessive risk-taking include:

Our compensation programs are designed to encourage employees to remain focused on both short-term and long-term goals through the use of performance-based annual cash incentive awards, which focus on short- term performance goals, and equity awards, which typically vest over a number of years and, therefore, encourage employees to focus on long-term performance.

The Compensation Committee determined that, for all employees, our compensation programs do not encourage excessive risk-taking or create risks that are reasonably likely to have a material adverse effect on the Company and, instead, encourage behaviors that support sustainable value generation.

No member of the Compensation Committee is currently, or ever has been, an officer or employee of Rigel. No executive officer of Rigel has served as a member of the Board or Compensation Committee of any entity that has one or more executive officers serving as a member of our Compensation Committee. Rigel has entered into indemnity agreements with all of our board members, including the members of our Compensation Committee, which

provide, among other things, that the Company will indemnify each of them, under the circumstances and to the extent provided for therein, for expenses, damages, judgments, fines and settlements he or she may be required to pay in actions or proceedings which he or she is or may be made a party by reason of his or her position as a director of Rigel, and otherwise to the fullest extent permitted under Delaware law and Rigel’s Bylaws.

The Finance Committee of the Board was formed in September 2004. The Finance Committee reviews and approves the overall strategy, plans, policies and actions related to adjustments to Rigel’s capital structure, certain financing arrangements and strategic collaborations for the Company. The following directors currently serve on the Finance

Committee: Mr. Rodriguez, Ms. Ali-Jackson, Ms. Wasman and Mr. Lapointe. Other than Mr. Rodriguez, all members of Rigel’s Finance Committee are independent (as “independence” is currently defined in Rule 5605(a)(2) of the Nasdaq listing standards). The Finance Committee met two time during fiscal year 2022.

The Corporate Governance, Health Care Compliance Oversight and Nominating Committee of the Board is responsible for identifying, reviewing and evaluating candidates to serve as directors of the Company (consistent with criteria approved by the Board), reviewing and evaluating incumbent directors, recommending candidates for election to the Board, making recommendations to the Board regarding the membership of the committees of the Board, overseeing the Company’s compliance with health care laws and regulations, and overseeing a set of corporate governance principles for Rigel. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee periodically

reviews, discusses, and assesses the performance of the Board, including Board committees, seeking input from senior management, the full Board, and others. The assessment shall include evaluation of the Board’s contribution as a whole and effectiveness in serving the best interests of the Company and its stockholders, specific areas in which the Board and/or management believe better contributions could be made, and overall Board composition and makeup, including the reelection of current Board members. The factors to be considered shall include whether the Directors, both individually and collectively, can and do provide the integrity, experience, judgment, commitment, skills and expertise appropriate for the

Company. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee also periodically review with the Chief Executive Officer the plans for succession to the offices of the Company’s executive officers and makes recommendations to the Board with respect to the selection of appropriate individuals to succeed to these positions. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee of the Board is also responsible for Rigel’s CEO succession planning, which it periodically reviews.

The Committee periodically reviews and assesses the risk exposure of Rigel, prioritizing as appropriate, and makes recommendations to management pertaining to monitoring and minimizing findings in such assessments. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee also periodically meets with, and communicates directly with, the Chief Compliance Officer. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee has oversight responsibility to identify risks relating to Rigel and health care compliance, to understand the plans to mitigate such risks, and to ensure the Board is aware of any issues related to Rigel and health care compliance.

The Corporate Governance, Health Care Compliance Oversight and Nominating Committee oversees risks relating to data privacy, technology and information security, including cyber-security, and back-up of information systems. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee communicates with the head of Information Technology of the Company annually, to review and assess risk exposure of the Company and make recommendations to management pertaining to monitoring and minimizing findings in such assessment. We assess the integrity of our information technology and cybersecurity platforms to ensure proper safety measures are implemented.

The following directors are currently members of the Corporate Governance, Health Care Compliance Oversight and Nominating Committee: Dr. Hannah, Dr. Kotzin and Ms. Wasman. Ms. Wasman serves as Chair. All members of the Corporate Governance, Health Care Compliance Oversight and Nominating Committee are independent (as “independence” is currently defined in Rule 5605(a)(2) of the Nasdaq listing standards). The Corporate Governance, Health Care Compliance Oversight and Nominating Committee met four times during fiscal year 2022. The Corporate Governance, Health Care Compliance

Oversight and Nominating Committee has adopted a written charter that is available to stockholders on our website at https://rigel.com/ investors/corporate-governance/governance-documents.

The Corporate Governance, Health Care Compliance Oversight and Nominating Committee believes that candidates for director should have certain minimum qualifications. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee will generally consider such factors as possessing relevant expertise upon which to be able to offer advice and guidance to management, demonstrating the ability to read and understand basic financial statements, having sufficient time to devote to the affairs of Rigel, possessing a reputation for personal integrity and ethics, having demonstrated excellence in his or her field, exhibiting the ability to exercise sound business judgment and having the commitment to rigorously represent the long-term interests of Rigel’s stockholders. However, the Corporate Governance, Health Care Compliance Oversight and Nominating Committee retains the right to modify these qualifications from time to time. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee also includes consideration of gender, social, underrepresentation, and cultural diversity as a factor in selecting nominees to serve on the Board. Although there is no specific policy on diversity, the Corporate Governance, Health Care Compliance Oversight and Nominating Committee considers the criteria noted above in selecting nominees for directors as well as the combined background, spectrum of experience and expertise of a nominee as enhancing the diversity of the Board. Candidates for director nominees are reviewed in the context of the current composition of the Board, the operating requirements of Rigel and the long-term interests of stockholders. In conducting this assessment, the Corporate Governance, Health Care Compliance Oversight and Nominating Committee considers all factors, as it deems appropriate, given the current needs of the Board and Rigel, to maintain a balance of knowledge, diversity, experience and capability. At each quarterly meeting, the Corporate Governance, Health Care Compliance Oversight and Nominating Committee is reviewing this topic and potential candidates to meet this commitment. In the case of incumbent directors whose terms of office are set to expire, the Corporate Governance, Health Care Compliance Oversight and Nominating Committee reviews these directors’ overall service to Rigel during their terms, including the number of meetings attended, level of participation, quality of performance, and any other relationships and transactions that might impair the directors’ independence. In the case

of new director candidates, the Corporate Governance, Health Care Compliance Oversight and Nominating Committee also determines whether the nominee is independent for Nasdaq purposes, which determination is based upon applicable Nasdaq listing standards, applicable SEC rules and regulations and the advice of counsel, if necessary. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee then uses its network of contacts to compile a list of potential candidates, but may also engage, if it deems appropriate, a professional search firm. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee conducts any appropriate and necessary inquiries into the backgrounds and qualifications of possible candidates, after considering the function and needs of the Board. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee meets to discuss and consider the candidates’ qualifications and then selects a nominee for recommendation to the Board.

The Corporate Governance, Health Care Compliance Oversight and Nominating Committee will consider director candidates recommended by stockholders. The Corporate Governance, Health Care Compliance Oversight and Nominating Committee does not intend to alter the manner in which it evaluates candidates,

including the minimum criteria set forth above, based on whether or not the candidate was recommended by a stockholder. Stockholders who wish to recommend individuals for consideration by the Corporate Governance, Health Care Compliance Oversight and Nominating Committee to become nominees for election to the Board may do so by delivering a written recommendation to the Corporate Governance, Health Care Compliance Oversight and Nominating Committee at least 120 days prior to the anniversary date of the mailing of Rigel’s proxy statement for the preceding annual meeting of stockholders, addressed to the Legal Department, Rigel Pharmaceuticals, Inc. at 611 Gateway Boulevard, Suite 900, South San Francisco, CA 94080. The deadline for nominating a director for the 2024 Annual Meeting of Stockholders is December 9, 2023. Submissions must include the full name of the proposed nominee, a description of the proposed nominee’s business experience for at least the previous five years, complete biographical information, a description of the proposed nominee’s qualifications as a director and a representation that the nominating stockholder is a beneficial or record holder of the Company’s stock and has been a holder for at least one year. Any such submission must be accompanied by the written consent of the proposed nominee to be named as a nominee and to serve as a director if elected.

In August 2015, the Board established a Scientific and Clinical Trial Advisory Committee. The following directors are currently members of the Scientific and Clinical Trial Advisory Committee: Dr. Kotzin, Dr. Hannah and Dr. Moos. Dr. Kotzin serves as Chair. The primary function of the Scientific and Clinical Trial Advisory Committee is to assist the Board in undertaking its oversight responsibilities with respect to the Company’s research and development activities as they related to the strategic and operating goals of

the Company, and reporting to the Board about developments and strategy, at such times as the Committee determines to be appropriate. All members of Rigel’s Scientific and Clinical Trial Advisory Committee are independent (as “independence” is currently defined in Rule 5605(a)(2) of the Nasdaq listing standards). The Scientific and Clinical Trial Advisory Committee met four times during fiscal year 2022.

To date, Rigel has not adopted a formal process related to stockholder communications with the Board. Nevertheless, every effort has been made to ensure that the views of stockholders are heard by the Board or individual directors, as applicable, and that appropriate and timely responses are provided to stockholders. We believe our responsiveness to stockholder communications to the Board has been excellent. If a formal process for stockholder communications with the Board is adopted, we will publish it promptly and post it on Rigel’s website.

Persons interested in communicating with the independent directors regarding their concerns or issues may address correspondence to a particular director, or to the independent directors generally, in care of Legal Department, Rigel Pharmaceuticals, Inc. at 611 Gateway Boulevard, Suite 900, South San Francisco, CA 94080. If no particular director is named, letters will be forwarded, depending on the subject matter, to the Chair of the Audit, Compensation, Finance or Corporate Governance, Health Care Compliance Oversight and Nominating Committee.

We have adopted the Rigel Pharmaceuticals Code of Conduct that applies to all officers, directors, employees and Third Parties. If Rigel makes any amendments to the Code of Conduct or grants any waiver from a provision of the Code of Conduct to any

executive officer or director, we intend to promptly disclose the nature of the amendment or waiver on our website. The Code of Conduct is available on our website at https://rigel.com/ investors/corporate-governance/governance-documents.

Subject to stockholder approval, our Board approved an amendment to the Rigel Pharmaceuticals, Inc. 2018 Equity Incentive Plan (the “2018 Plan”) on February 3, 2023 (the 2018 Plan, as amended, the “Amended 2018 Plan”) to increase the number of shares of common stock authorized for issuance under the 2018 Plan by 4,000,000 shares.

In this Proposal No. 2, our stockholders are being asked to approve the Amended 2018 Plan. Our Board believes that the Amended 2018 Plan is an integral part of our long-term compensation policy and that the Amended 2018 Plan is necessary to continue providing the appropriate levels and types of equity compensation to our employees.

Our Board believes it is in the best interests of the Company and our stockholders to approve the Amended 2018 Plan to increase the number of shares available for issuance by an additional 4,000,000 shares, given the need to support the launch of our second commercial product and the continued market opportunities around both our commercial products and our pipeline. If the Amended 2018 Plan is not approved, we will not have a sufficient number of authorized shares for future issuance past 2024. Prior to the Board approving the Amended 2018 Plan, 27,657,133 shares of common stock were

authorized for issuance under the 2018 Plan, plus the Prior Plans’ returning shares, if any, which become available for grant under this Plan from time to time, as a result of the repurchase of shares or the cancellation or expiration of options under such Prior Plans. As of March 15, 2023, 7,354,654 shares of common stock remained available for future grant under the 2018 Plan. If this Proposal No. 2 is approved, an additional 4,000,000 shares will become available for future grant under the Amended 2018 Plan, which, as discussed below, we expect will enable us to make anticipated equity award grants into 2025.

Our Board believes that our future success depends, in large part, on our ability to maintain a competitive position in attracting, retaining and motivating key personnel, non-employee directors, consultants and advisors. The Board believes that the issuance of equity awards is a key element underlying our ability to attract, retain and motivate key personnel, non-employee directors, consultants and advisors, and better aligns the interests of our personnel, non-employee directors, consultants and advisors with those of our stockholders. The Amended 2018 Plan will allow us to continue to provide performance-based incentives to our eligible employees, non-employee directors, consultants and advisors. Therefore, the Board believes that the Amended 2018 Plan is in the best interests of the Company and its stockholders and recommends a vote in favor of this Proposal No. 2.

The Board now believes that the Amended 2018 Plan is necessary to provide a sufficient number of shares available for issuance to allow us to continue to attract and retain the services of talented individuals deemed essential to our long-term growth and financial success. For example, we continue to evolve our sales force and commercial team to add to our portfolio of

commercial products, meet increasing demand, and adapt to market conditions and the needs of our patients. The company is working diligently to potentially expand indications as well as deepening its pipeline and assessing potential in-licensing. In addition, since the adoption of the 2018 Plan, we have hired four executive officers. Our Board strongly believes that the issuance of equity awards is a key element underlying our ability to attract, retain and motivate our employees, including our executives, and our consultants and advisors, and is a substantial contributing factor to our success and the growth of our business. So far we have relied significantly on equity incentives in the form of stock option and restricted stock unit (“RSU”) awards to attract and retain key employees, and we believe that equity incentives are necessary for us to remain competitive in the marketplace for executive talent and other employees. We believe that the adoption of the Amended 2018 Plan will help enable continued growth of both our sales and our pipeline. In particular, an immediate increase to the share reserve will provide the Board with flexibility to make anticipated annual equity awards to eligible employees into 2025.

We continue to believe that equity awards such as stock options and RSU awards are a vital part of our overall compensation program. Our compensation

philosophy reflects broad-based eligibility for equity incentive awards, and we grant awards to substantially all of our employees. However, we recognize that equity awards dilute existing stockholders, and, therefore, we must responsibly manage the growth of our equity compensation program. We are committed to effectively monitoring our equity compensation share reserve, including our “burn rate” and “overhang,” to maximize stockholders’ value by granting the appropriate number of equity incentive awards deemed necessary to attract, reward, and retain employees and non-employee directors. The tables below show our overhang and burn rate percentages, which we believe reflects a responsible use of equity awards, especially when compared to our industry peers.

If the Amended 2018 Plan is approved by our stockholders, we expect to have approximately 11,400,000 shares available for grant after our Annual Meeting, which we anticipate being a pool of shares sufficient for grants into 2025, and necessary to provide a predictable amount of equity for attracting, retaining, and motivating employees in the near term. We believe that the size of our request is also reasonable in light of the equity granted to our employees and directors over the past year.

The 2018 Plan includes provisions that are designed to protect our stockholders’ interests and to reflect corporate governance best practices, and these provisions remain unchanged in the Amended 2018 Plan. Highlights of our Amended 2018 Plan include:

The material features of the Amended 2018 Plan are described below. The following description of the Amended 2018 Plan is a summary only and is qualified in its entirety by reference to the complete text of the

Amended 2018 Plan. Stockholders are urged to read the actual text of the Amended 2018 Plan in its entirety, which is attached to this proxy statement as Appendix A.

The Amended 2018 Plan is designed to secure and retain the services of employees, directors and consultants, of the Company and its affiliates, provide incentives for employees, directors and consultants of the Company and its affiliates to exert maximum

efforts for the success of the Company and our affiliates, and provide a means by which our employees, directors and consultants may be given an opportunity to benefit from increases in the value of our common stock.

The terms of the Amended 2018 Plan provide for the grant of incentive stock options, non-statutory stock

options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance stock awards, and other stock awards.

Subject to adjustment for certain changes in our capitalization, the aggregate number of shares of our common stock that may be issued under the Amended 2018 Plan, or the Share Reserve, will not exceed (A) 31,657,133, which is the sum of (i) 10,032,133 shares subject to the Prior Plans’ Available Reserve (as defined below) (ii) 5,000,000 shares originally added to the Share Reserve in connection with the Company’s adoption of the 2018 Plan, (iii) 4,000,000 shares added to the 2018 Plan and approved by our stockholders in 2019, (iv) 2,800,000 shares added to the 2018 Plan and approved by our stockholders in 2020, (v) 825,000 shares added to the 2018 Plan and approved by our stockholders in 2021, (vi) 5,000,000 shares added to the 2018 Plan and approved by our stockholders in 2022, and (vii) 4,000,000 shares that are subject to approval by our stockholders under this Proposal No. 2, and (B) any Prior Plans’ Returning Shares (as defined below), as such shares become available from time to time.

The “Prior Plans’ Available Reserve” refers to the unallocated shares that, as of the effective date of the 2018 Plan, remained available for grant under the Rigel Pharmaceuticals, Inc. 2011 Equity Incentive Plan, the Rigel Pharmaceuticals, Inc. 2000 Equity Incentive Plan, as amended and restated, and the Rigel Pharmaceuticals, Inc. 2000 Non-Employee Directors’ Stock Option Plan (collectively, the “Prior Plans”).

The “Prior Plans’ Returning Shares” are shares subject to outstanding stock awards granted under the Prior Plans that, from and after the effective date of the Amended 2018 Plan, (i) expire or terminate for any

reason prior to exercise or settlement, (ii) are forfeited, cancelled or otherwise returned to us because of the failure to meet a contingency or condition required for the vesting of such shares, or (iii) other than with respect to outstanding stock options and stock appreciation rights granted under the Prior Plans with an exercise or strike price of at least 100% of the fair market value of the underlying common stock on the date of grant (“Prior Plans’ Appreciation Awards”), are reacquired or withheld (or not issued) by us to satisfy a tax withholding obligation in connection with a stock award.

The number of shares of our common stock available for issuance under the Amended 2018 Plan will be reduced by (i) one share for each share of common stock issued pursuant to a stock option or stock appreciation right with an exercise or strike price of at least 100% of the fair market value of the underlying common stock on the date of grant, and (ii) 1.44 shares for each share of common stock issued pursuant to a Full Value Award.

If (i) any shares of common stock subject to a stock award are not issued because the stock award expires or otherwise terminates without all of the shares covered by the stock award having been issued or is settled in cash, (ii) any shares of common stock issued pursuant to a stock award are forfeited back to or repurchased by us because of the failure to meet a contingency or condition required for the vesting of such shares, or (iii) with respect to a Full Value Award, any shares of common stock are reacquired or withheld (or not issued) by us to satisfy a tax withholding obligation in connection with the award, then such shares will again become available for issuance under the Amended 2018 Plan (collectively, the “2018 Plan

Returning Shares”). For each 2018 Plan Returning Share subject to a Full Value Award, the number of shares of common stock available for issuance under the Amended 2018 Plan will increase by 1.44 shares.

Any shares of common stock reacquired or withheld (or not issued) by us to satisfy the exercise or purchase price of a stock award will no longer be available for issuance under the Amended 2018 Plan, including any shares subject to a stock award that are not delivered to a participant because the stock award is exercised through a reduction of shares subject to the stock

award. In addition, any shares reacquired or withheld (or not issued) by us to satisfy a tax withholding obligation in connection with a stock option or stock appreciation right granted under the Amended 2018 Plan or a Prior Plans’ Appreciation Award, or any shares repurchased by us on the open market with the proceeds of the exercise or strike price of a stock option or stock appreciation right granted under the Amended 2018 Plan or a Prior Plans’ Appreciation Award will no longer be available for issuance under the Amended 2018 Plan.

All of our (including our affiliates’) approximately 147 employees, seven non-employee directors and approximately 75 consultants as of March 27, 2023 are eligible to participate in the Amended 2018 Plan and may receive all types of awards other than incentive stock options. Incentive stock options may be granted

under the Amended 2018 Plan only to our employees (including officers) and employees of our affiliates. Recipients of awards under the Amended 2018 Plan are selected by the Plan Administrator or its delegate, in its sole discretion.

The Amended 2018 Plan provides that the maximum value of all compensation granted or paid, as applicable, to any non-employee director per year shall not exceed (i) $1,000,000 in total value or (ii) $1,500,000 in total value in the event such non-employee director is first appointed or elected to the Board during such year subject to exceptions under

extraordinary circumstances, where the non-employee director receiving any compensation in excess of such limit may not participate in the decision to award such compensation. Additional information on non-employee director compensation is included below in the section titled “Director Compensation.”

The Amended 2018 Plan will be administered by our Board, which may in turn delegate authority to administer the Amended 2018 Plan to a committee. Our Board has delegated concurrent authority to administer the Amended 2018 Plan to our Compensation Committee, but may, at any time, revest in itself some or all of the power delegated to our Compensation Committee. The Board and the Compensation Committee are each considered to be a Plan Administrator for purposes of this Proposal No. 2. Subject to the terms of the Amended 2018 Plan, the Plan Administrator, may determine the recipients, the types of awards to be granted, the number of shares of our common stock subject to or the cash value of awards, and the terms and conditions of awards granted under the Amended 2018 Plan, including the period of their exercisability and vesting. The Plan Administrator also has the authority to provide for

accelerated exercisability and vesting of awards. Subject to the limitations set forth below, the Plan Administrator also determines the fair market value applicable to a stock award and the exercise or strike price of stock options and stock appreciation rights granted under the Amended 2018 Plan.

The Plan Administrator may also delegate to one or more officers the authority to (i) designate employees who are not officers to be recipients of certain stock awards, and (ii) determine the number of shares of our common stock subject to such stock awards. Under any such delegation, the Plan Administrator will specify the total number of shares of our common stock that may be subject to the stock awards granted by such officer. The officer may not grant a stock award to himself or herself.

Under the Amended 2018 Plan, the Plan Administrator does not have the authority to reprice any outstanding stock option or stock appreciation right by reducing the exercise or strike price of the stock option or stock appreciation right or to cancel any outstanding stock

option or stock appreciation right that has an exercise or strike price greater than the then-current fair market value of our common stock in exchange for cash or

Stock options may be granted under the Amended 2018 Plan pursuant to stock option agreements. The Amended 2018 Plan permits the grant of stock options that are intended to qualify as incentive stock options, or ISOs, and non-statutory stock options, or NSOs.

The exercise price of a stock option granted under the Amended 2018 Plan may not be less than 100% of the fair market value of the common stock subject to the stock option on the date of grant and, in some cases (see “Limitations on Incentive Stock Options” below), may not be less than 110% of such fair market value, in each case other than certain stock options granted pursuant to an assumption of or substitution for another stock option pursuant to a “corporate transaction” (as defined in the Amended 2018 Plan) and in a manner consistent with applicable law.

The term of stock options granted under the Amended 2018 Plan may not exceed ten years and, in some cases (see “Limitations on Incentive Stock Options” below), may not exceed five years. Except as otherwise provided in a participant’s stock option agreement or other written agreement with us or one of our affiliates, if a participant’s service relationship with us or any of our affiliates (referred to in this Proposal No. 2 as “continuous service”) terminates (other than for cause and other than upon the participant’s death or disability), the participant may exercise any vested stock options for up to three months following the participant’s termination of continuous service. Except as otherwise provided in a participant’s stock option agreement or other written agreement with us or one of our affiliates, if a participant’s continuous service terminates due to the participant’s disability or death (or the participant dies within a specified period, if any, following termination of continuous service), the participant, or his or her beneficiary, as applicable, may exercise any vested stock options for up to 12 months following the participant’s termination due to the participant’s disability or for up to 18 months following the participant’s death. Except as explicitly provided otherwise in a participant’s stock option agreement or other written agreement with us or one of our affiliates, if a participant’s continuous service is terminated for cause (as defined in the Amended 2018 Plan), all stock options held by the participant will terminate upon the participant’s termination of continuous service and the participant will be prohibited from exercising any stock option from and after such termination date. Except as

otherwise provided in a participant’s stock option agreement or other written agreement with us or one of our affiliates, the term of a stock option may be extended if the exercise of the stock option following the participant’s termination of continuous service (other than for cause and other than upon the participant’s death or disability) would be prohibited by applicable securities laws or if the sale of any common stock received upon exercise of the stock option following the participant’s termination of continuous service (other than for cause) would violate our insider trading policy. In no event, however, may a stock option be exercised after its original expiration date.

Acceptable forms of consideration for the purchase of our common stock pursuant to the exercise of a stock option under the Amended 2018 Plan will be determined by the Plan Administrator and may include payment by any combination of the following methods: (i) by cash, check, bank draft or money order payable to us; (ii) pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board; (iii) by delivery to us of shares of our common stock (either by actual delivery or attestation); (iv) by a net exercise arrangement (for NSOs only); or (v) in other legal consideration approved by the Plan Administrator.

Stock options granted under the Amended 2018 Plan may become exercisable in cumulative increments, or “vest,” as determined by the Plan Administrator at the rate specified in the stock option agreement. Shares covered by different stock options granted under the Amended 2018 Plan may be subject to different vesting schedules as the Plan Administrator may determine.

The Plan Administrator may impose limitations on the transferability of stock options granted under the Amended 2018 Plan in its discretion. Generally, a participant may not transfer a stock option granted under the Amended 2018 Plan other than by will or the laws of descent and distribution or, subject to approval by the Plan Administrator, pursuant to a domestic relations order or an official marital settlement agreement or other divorce or separation instrument. However, the Plan Administrator may permit transfer of a stock option in a manner that is not prohibited by applicable tax and securities laws. In addition, subject to approval by the Plan Administrator, a participant may designate a beneficiary who may exercise the stock option following the participant’s death.

The aggregate fair market value, determined at the time of grant, of shares of our common stock with respect to ISOs that are exercisable for the first time by a participant during any calendar year under all of our stock plans may not exceed $100,000. The stock options or portions of stock options that exceed this limit or otherwise fail to qualify as ISOs are treated as NSOs. No ISO may be granted to any person who, at the time of grant, owns or is deemed to own stock possessing more than 10% of our total combined voting power or that of any affiliate unless the following conditions are satisfied:

Subject to adjustment for certain changes in our capitalization, the aggregate maximum number of shares of our common stock that may be issued pursuant to the exercise of ISOs under the Amended 2018 Plan is 39,070,403 shares.

Stock appreciation rights may be granted under the Amended 2018 Plan pursuant to stock appreciation right agreements. Each stock appreciation right is denominated in common stock share equivalents. The strike price of each stock appreciation right will be determined by the Plan Administrator, but will in no event be less than 100% of the fair market value of the common stock subject to the stock appreciation right on the date of grant, other than certain stock appreciation rights granted pursuant to an assumption of or substitution for another stock appreciation right pursuant to a “corporate transaction” (as defined in the Amended 2018 Plan) and in a manner consistent with

applicable law. The Plan Administrator may also impose restrictions or conditions upon the vesting of stock appreciation rights that it deems appropriate. The appreciation distribution payable upon exercise of a stock appreciation right may be paid in shares of our common stock, in cash, in a combination of cash and stock, or in any other form of consideration determined by the Plan Administrator and set forth in the stock appreciation right agreement. Stock appreciation rights will be subject to the same conditions upon termination of continuous service and restrictions on transfer as stock options under the Amended 2018 Plan.

Restricted stock awards may be granted under the Amended 2018 Plan pursuant to restricted stock award agreements. A restricted stock award may be granted in consideration for cash, check, bank draft or money order payable to us, the participant’s services performed for us or any of our affiliates, or any other form of legal consideration acceptable to the Plan Administrator. Shares of our common stock acquired under a restricted stock award may be subject to forfeiture to or repurchase by us in accordance with a

vesting schedule to be determined by the Plan Administrator. Rights to acquire shares of our common stock under a restricted stock award may be transferred only upon such terms and conditions as are set forth in the restricted stock award agreement. A restricted stock award agreement may provide that any dividends paid on restricted stock will be subject to the same vesting conditions as apply to the shares subject to the restricted stock award.

RSU awards may be granted under the Amended 2018 Plan pursuant to RSU award agreements. Payment of any purchase price may be made in any form of legal consideration acceptable to the Plan Administrator. A RSU award may be settled by the delivery of shares of our common stock, in cash, in a combination of cash and stock, or in any other form of consideration determined by the Plan Administrator and set forth in the RSU award agreement. RSU awards may be subject to vesting in accordance with

a vesting schedule to be determined by the Plan Administrator. Dividend equivalents may be credited in respect of shares of our common stock covered by a RSU award, provided that any additional shares credited by reason of such dividend equivalents will be subject to all of the same terms and conditions of the underlying RSU award. Except as otherwise provided in a participant’s RSU award agreement, RSUs that have not vested will be forfeited upon the participant’s termination of continuous service for any reason.

The Amended 2018 Plan allows us to grant performance stock awards.

A performance stock award is a stock award that is payable (including that may be granted, may vest, or may be exercised) contingent upon the attainment of pre-determined performance goals during a performance period. A performance stock award may require the completion of a specified period of continuous service. The length of any performance period, the performance goals to be achieved during the performance period, and the measure of whether and to what degree such performance goals have been attained will be determined by the Plan Administrator in its discretion. In addition, to the extent permitted by applicable law and the performance stock award agreement, the Plan Administrator may determine that cash may be used in payment of performance stock awards.

Performance goals under the Amended 2018 Plan will be based on any one or more of the following performance criteria: (i) earnings per share; (ii) earnings before interest, taxes and depreciation; (iii) earnings before interest, taxes, depreciation and amortization (EBITDA); (iv) net earnings; (v) total stockholder return; (vi) return on equity; (vii) return on assets, investment, or capital employed; (viii) operating margin; (ix) gross margin; (x) operating income; (xi) net income (before or after taxes); (xii) net operating income; (xiii) net operating income after tax; (xiv) pre- and after-tax income; (xv) pre-tax profit; (xvi) operating cash flow; (xvii) sales or revenue targets; (xviii) increases in revenue or product revenue; (xix) expenses and cost reduction goals; (xx) improvement in or attainment of expense levels; (xxi) improvement in or attainment of working capital levels; (xxii) economic value added (or an equivalent

metric); (xxiii) market share; (xxiv) cash flow; (xxv) cash flow per share; (xxvi) share price performance; (xxvii) debt reduction; (xxviii) implementation or completion of projects or processes; (xxix) customer satisfaction; (xxx) total stockholder return; (xxxi) stockholders’ equity; and (xxxii) other measures of performance selected by the Plan Administrator.

Performance goals may be based on a company-wide basis, with respect to one or more business units, divisions, affiliates or business segments, and in either absolute terms or relative to the performance of one or more comparable companies or the performance of one or more relevant indices. The Plan Administrator is authorized to make appropriate adjustments in the method of calculating the attainment of performance goals for a performance period as follows: (i) to exclude restructuring and/or other nonrecurring charges; (ii) to exclude exchange rate effects, as applicable, for non-U.S. dollar denominated net sales and operating earnings; (iii) to exclude the effects of changes to generally accepted accounting standards required by the Financial Accounting Standards Board; (iv) to exclude the effects of any items that are “unusual” in nature or occur “infrequently” as determined under generally accepted accounting principles; (v) to exclude the effects to any statutory adjustments to corporate tax rates; and (vi) to make other appropriate adjustments selected by the Plan Administrator.

In addition, the Plan Administrator retains the discretion to reduce or eliminate the compensation or economic benefit due upon the attainment of any performance goals and to define the manner of calculating the performance criteria it selects to use for a performance period.

Other forms of stock awards valued in whole or in part by reference to, or otherwise based on, our common stock may be granted either alone or in addition to other stock awards under the Amended 2018 Plan. Subject to the terms of the Amended 2018 Plan, the Plan Administrator will have sole and complete

authority to determine the persons to whom and the time or times at which such other stock awards will be granted, the number of shares of our common stock to be granted and all other terms and conditions of such other stock awards.

In January 2019, the Compensation Committee adopted, and then the Board of Directors ratified, the Incentive Compensation Recoupment Policy (“Clawback Policy”). Under this policy, cash or equity awards granted under the Amended 2018 Plan will be subject to recoupment. In addition, the Plan

Administrator may impose other clawback, recovery or recoupment provisions in an award agreement as the Plan Administrator determines necessary or appropriate, including a reacquisition right in respect of previously acquired shares of our common stock or other cash or property upon the occurrence of cause.

In the event of certain capitalization adjustments, the Plan Administrator will appropriately adjust: (i) the class(es) and maximum number of securities subject to the Amended 2018 Plan; (ii) the class(es) and maximum

number of securities that may be issued pursuant to the exercise of ISOs; and (iii) the class(es) and number of securities and price per share of stock subject to outstanding stock awards.

The following applies to stock awards under the Amended 2018 Plan in the event of a corporate transaction (as defined in the Amended 2018 Plan), unless otherwise provided in a participant’s stock award agreement or other written agreement with us or one of our affiliates or in any director compensation policy or unless otherwise expressly provided by the Plan Administrator at the time of grant.

In the event of a corporate transaction, any stock awards outstanding under the Amended 2018 Plan may be assumed, continued or substituted for by any surviving or acquiring corporation (or its parent company), and any reacquisition or repurchase rights held by us with respect to the stock award may be assigned to the successor (or its parent company). If the surviving or acquiring corporation (or its parent company) does not assume, continue or substitute for such stock awards, then (i) with respect to any such stock awards that are held by participants whose continuous service has not terminated prior to the effective time of the corporate transaction (“Current Participants”), the vesting (and exercisability, if applicable) of such time-based stock awards will be accelerated in full to a date prior to the effective time of the corporate transaction (contingent upon the effectiveness of the corporate transaction), and such stock awards will terminate if not exercised (if applicable) at or prior to the effective time of the corporate transaction, and any reacquisition or repurchase rights held by us with respect to such stock awards will lapse (contingent upon the effectiveness of the corporate transaction), and (ii) any such stock awards that are held by persons other than Current

Participants will terminate if not exercised (if applicable) prior to the effective time of the corporate transaction, except that any reacquisition or repurchase rights held by us with respect to such stock awards will not terminate and may continue to be exercised notwithstanding the corporate transaction.

In the event a stock award will terminate if not exercised prior to the effective time of a corporate transaction, the Plan Administrator may provide, in its sole discretion, that the holder of such stock award may not exercise such stock award but instead will receive a payment equal in value to the excess (if any) of (i) the value of the property the participant would have received upon exercise of such stock award immediately prior to the effective time of the corporate transaction (after application of the vesting acceleration described above) over (ii) any exercise price payable in connection with such exercise.

For purposes of the Amended 2018 Plan, a corporate transaction generally will be deemed to occur in the event of the consummation of: (i) a sale, lease or other disposition of all or substantially all of our assets; (ii) a sale or other disposition of at least 90% of our outstanding securities; (iii) a merger, consolidation or similar transaction following which we are not the surviving corporation; or (iv) a reverse merger, consolidation or similar transaction following which we are the surviving corporation but the shares of our common stock outstanding immediately prior to the transaction are converted or exchanged into other property by virtue of the transaction.

Under the Amended 2018 Plan, a stock award will not be subject to additional acceleration of vesting and exercisability in connection with a change in control (as defined in the Amended 2018 Plan and described below), unless otherwise provided in the participant’s stock award agreement or as otherwise may be provided in any other written agreement with us or one of our affiliates. Notwithstanding the preceding, upon a change in control, all stock awards held by each director who is not an employee and whose continuous service has not terminated immediately

prior to the change in control will become fully vested and exercisable immediately prior to the effectiveness of such change in control.

For purposes of the Amended 2018 Plan, a change in control generally will be deemed to occur in the event of: (i) the acquisition of beneficial ownership of 50% or more of the combined voting power of our then outstanding securities; (ii) the individuals who, as of the effective date of the Amended 2018 Plan, are members of the Board, or the incumbent board, cease to constitute at least a majority of the Board, unless the election or nomination of any new director was approved by a vote of at least a

majority of the incumbent board; (iii) the closing of (1) a merger or consolidation if our stockholders immediately prior thereto do not own, directly or indirectly, more than 50% of the combined outstanding voting power of the corporation resulting from such transaction in substantially the same proportions as their ownership of our outstanding voting securities immediately prior to such transaction; or (2) a complete liquidation or dissolution of the Company or an agreement for the sale or other disposition of all or substantially all the assets of the Company.

The acceleration of vesting of an award in the event of a corporate transaction or a change in control event under the Amended 2018 Plan may be viewed as an anti-takeover provision, which may have the effect of discouraging a proposal to acquire or otherwise obtain control of us.

The Plan Administrator will have the authority to amend or terminate the Amended 2018 Plan at any time. However, except as otherwise provided in the Amended 2018 Plan or an award agreement, no amendment or termination of the Amended 2018 Plan may materially impair a participant’s rights under his or her outstanding awards without the participant’s

consent. We will obtain stockholder approval of any amendment to the Amended 2018 Plan as required by applicable law and listing requirements. No incentive stock options may be granted under the Amended 2018 Plan after the tenth anniversary of the date the Amended 2018 Plan was adopted by our Board.

The following is a summary of the principal United States federal income tax consequences to participants and us with respect to participation in the Amended 2018 Plan. This summary is not intended to be exhaustive and does not discuss the income tax laws of any local, state or foreign jurisdiction in which a participant may reside, or which may apply to a participant. The information is based upon current federal income tax rules and therefore is subject to change when those rules change. Because the tax consequences to any participant may depend on his or her particular situation, each participant should

consult the participant’s tax adviser regarding the federal, state, local and other tax consequences of the grant or exercise of an award or the disposition of stock acquired the Amended 2018 Plan. The Amended 2018 Plan is not qualified under the provisions of Section 401(a) of the Code and is not subject to any of the provisions of the Employee Retirement Income Security Act of 1974. Our ability to realize the benefit of any tax deductions described below depends on our generation of taxable income as well as the requirement of reasonableness and the satisfaction of our tax reporting obligations.

Generally, there is no taxation upon the grant of an NSO if the stock option is granted with an exercise price equal to the fair market value of the underlying stock on the grant date. Upon exercise, a participant will recognize ordinary income equal to the excess, if any, of the fair market value of the underlying stock on the date of exercise of the stock option over the exercise price. If the participant is employed by us or one of our affiliates, that income will be subject to withholding taxes. The participant’s tax basis in those shares will be equal to the fair market value of the

underlying stock on the date of exercise of the stock option, and the participant’s capital gain holding period for those shares will begin on the day after such shares are transferred to the participant.

Subject to the requirement of reasonableness, the provisions of Section 162(m) of the Code, and the satisfaction of a tax reporting obligation, we will generally be entitled to a tax deduction equal to the taxable ordinary income realized by the participant.

The Amended 2018 Plan provides for the grant of stock options that are intended to qualify as “incentive stock options,” as defined in Section 422 of the Code. Under the Code, a participant generally is not subject to ordinary income tax upon the grant or exercise of an ISO. If the participant holds a share received upon

exercise of an ISO for more than two years from the date the stock option was granted and more than one year from the date the stock option was exercised, which is referred to as the required holding period, the difference, if any, between the amount realized on a

sale or other taxable disposition of that share and the participant’s tax basis in that share will be long-term capital gain or loss.

If, however, a participant disposes of a share acquired upon exercise of an ISO before the end of the required holding period, which is referred to as a disqualifying disposition, the participant generally will recognize ordinary income in the year of the disqualifying disposition equal to the excess, if any, of the fair market value of the share on the date of exercise of the stock option over the exercise price. However, if the sales proceeds are less than the fair market value of the share on the date of exercise of the stock option, the amount of ordinary income recognized by the participant will not exceed the gain, if any, realized on the sale. If the amount realized on a disqualifying disposition exceeds the fair market value of the share on the date of exercise of the stock option, that excess will be short-term or long-term capital gain, depending on whether the holding period for the share exceeds one year.

For purposes of the alternative minimum tax, the amount by which the fair market value of a share of stock acquired upon exercise of an ISO exceeds the

exercise price of the stock option generally will be an adjustment included in the participant’s alternative minimum taxable income for the year in which the stock option is exercised. If, however, there is a disqualifying disposition of the share in the year in which the stock option is exercised, there will be no adjustment for alternative minimum tax purposes with respect to that share. In computing alternative minimum taxable income, the tax basis of a share acquired upon exercise of an ISO is increased by the amount of the adjustment taken into account with respect to that share for alternative minimum tax purposes in the year the stock option is exercised.

We are not allowed a tax deduction with respect to the grant or exercise of an ISO, or the disposition of a share acquired upon exercise of an ISO after the required holding period. If there is a disqualifying disposition of a share, however, we will generally be entitled to a tax deduction equal to the taxable ordinary income realized by the participant, subject to the requirement of reasonableness, the provisions of Section 162(m) of the Code, and provided that either the employee includes that amount in income, or we timely satisfy our reporting requirements with respect to that amount.

Generally, the recipient of a restricted stock award will recognize ordinary income at the time the stock is received equal to the excess, if any, of the fair market value of the stock received over any amount paid by the recipient in exchange for the stock. If, however, the stock is not vested (i.e., subject to a substantial risk of forfeiture) when it is received (for example, if the employee is required to work for a period of time in order to have the right to sell the stock), the recipient generally will not recognize income until the stock becomes vested, at which time the recipient will recognize ordinary income equal to the excess, if any, of the fair market value of the stock on the date it becomes vested over any amount paid by the recipient in exchange for the stock. A recipient may, however, file an election with the Internal Revenue Service, within 30 days following his or her receipt of the stock award, to recognize ordinary income, as of

the date the recipient receives the award, equal to the excess, if any, of the fair market value of the stock on the date the award is granted over any amount paid by the recipient for the stock.

The recipient’s basis for the determination of gain or loss upon the subsequent disposition of shares acquired from a restricted stock award will be the amount paid for such shares plus any ordinary income recognized either when the stock is received or when the stock becomes vested.

Subject to the requirement of reasonableness, the provisions of Section 162(m) of the Code, and the satisfaction of a tax reporting obligation, we will generally be entitled to a tax deduction equal to the taxable ordinary income realized by the recipient of the restricted stock award.

Generally, the recipient of a restricted stock unit award structured to comply with the requirements of Section 409A of the Code or an exception to Section 409A of the Code will recognize ordinary income at the time the stock is delivered equal to the excess, if any, of the fair market value of the stock received over any amount paid by the recipient in exchange for the stock. Restricted stock unit awards granted pursuant to the Amended 2018 Plan are intended to comply with or be exempt from Section 409A of the Code.

The recipient’s basis for the determination of gain or loss upon the subsequent disposition of shares acquired from a restricted stock unit award will be the amount paid for such shares plus any ordinary income recognized when the stock is delivered.

Subject to the requirement of reasonableness, the provisions of Section 162(m) of the Code, and the satisfaction of a tax reporting obligation, we will

Generally, if a stock appreciation right is granted with an exercise price equal to the fair market value of the underlying stock on the grant date, the recipient will recognize ordinary income equal to the fair market value of the stock or cash received upon such exercise. Subject to the requirement of reasonableness, the

provisions of Section 162(m) of the Code, and the satisfaction of a tax reporting obligation, we will generally be entitled to a tax deduction equal to the taxable ordinary income realized by the recipient of the stock appreciation right.

The following table shows, for each of the individuals and the various groups indicated, the number of shares of our common stock underlying awards that

have been granted (even if not currently outstanding) under the 2018 Plan since its approval by our stockholders in 2018 and through March 15, 2023.

Stockholders are requested in this Proposal No. 2 to approve the amendment to our Amended 2018 Plan described above. The affirmative vote of the holders of a majority of the shares present online or represented by proxy and entitled to vote at the Annual Meeting will be required to approve the amendment to our Amended 2018 Plan. Abstentions will be counted toward the tabulation of votes cast on proposals presented to the stockholders and will have the same

effect as negative votes. Broker non-votes are counted towards a quorum, but are not counted for any purpose in determining whether this matter has been approved. The Amended 2018 Plan will not go into effect if our stockholders do not vote “FOR” the approval of the amendment to the 2018 Plan. A copy of the Amended 2018 Plan is appended to this proxy statement as Appendix A.

The Dodd-Frank Act and Section 14A of the Exchange Act also enable our stockholders to indicate their preference regarding how frequently we should solicit a non-binding advisory vote on the compensation of our Named Executive Officers as disclosed in our proxy statements. Accordingly, we are asking stockholders to indicate whether they would prefer an advisory vote every year, every other year or every three years. Alternatively, stockholders may abstain from casting a vote. For the reasons described below, the Board recommends that the stockholders select a frequency of every year.

After consideration, our Board has determined that holding an advisory vote on executive compensation every year is the most appropriate policy for us at this time, and recommends that stockholders vote for future advisory votes on executive compensation to occur every year. While our executive compensation program is designed to promote a long-term connection between pay and performance, the Board recognizes that executive compensation disclosures are made annually. The Board considered that an annual advisory vote on executive compensation will allow our stockholders to provide us with their direct input on our compensation philosophy, policies and practices as disclosed in the proxy statement every year. The Board also considered that at the 2017 Annual Meeting, our stockholders indicated their preference that the Company solicit a non-binding advisory vote on the compensation of the named executive officers, commonly referred to as a “say-on-pay vote,” every year. Stockholders should note, however, that because the advisory vote on executive compensation occurs well into the compensation year, and because the different elements of our executive compensation program are designed to operate as part of an integrated program, it may not be

appropriate or feasible to modify our executive compensation program in consideration of any one year’s advisory vote on executive compensation by the time of the following year’s annual meeting of stockholders.

The Board is asking our stockholders to indicate their preferred voting frequency by voting for one, two or three years.

While the Board believes that its recommendation is appropriate at this time, our stockholders are not voting to approve or disapprove that recommendation, but are instead asked to indicate their preferences, on an advisory basis, as to whether the non-binding advisory vote on the approval of the Company’s executive officer compensation practices should be held every year, every other year, or every three years. The option among those choices that receives the votes of the holders of a majority of shares present in person or represented by proxy and entitled to vote at the annual meeting will be deemed to be the frequency preferred by the stockholders.

The Board and the Compensation Committee value the opinions of our stockholders in this matter and, to the extent there is any significant vote in favor of one frequency over the other options, even if less than a majority, the Board will consider our stockholders’ concerns and evaluate any appropriate next steps. However, because this vote is advisory and therefore not binding on the Board or us, the Board may decide that it is in the best interests of our stockholders that we hold an advisory vote on executive compensation more or less frequently than the option preferred by our stockholders. The vote will not be construed to create or imply any change or addition to the fiduciary duties of us or the Board.

At the 2017 Annual Meeting, our stockholders indicated their preference that the Company solicit a non- binding advisory vote on the compensation of the named executive officers, commonly referred to as a “say- on-pay vote,” every year. The Board has adopted a policy that is consistent with that preference. In accordance with that policy, this year, the Board is again asking the stockholders to approve, on an advisory basis, the compensation of our named executive officers as disclosed in this proxy statement in accordance with SEC rules.

This vote is not intended to address any specific item of compensation, but rather the overall compensation of our named executive officers and the philosophy, policies and practices described in this proxy statement. The compensation of our named executive officers subject to the vote is disclosed in the Compensation Discussion and Analysis section, the compensation tables and the related narrative disclosure contained in this proxy statement.

As discussed in the Compensation Discussion and Analysis section of this proxy statement, we believe that our compensation policies and decisions are designed to motivate our management team to create long-term value for our stockholders by achieving strategic business objectives while effectively managing the risks and challenges inherent in a clinical stage biotechnology company. Further, we believe that our long-term success depends in large measure on the talents of our employees. Our compensation system plays a significant role in our ability to attract, retain and motivate the highest quality workforce and experienced executives to lead us successfully in a competitive environment. We believe that our current executive compensation program directly links executive compensation to performance, aligning the

interests of our executive officers with those of our stockholders. We encourage you to review carefully the “Compensation Discussion and Analysis” section of this proxy statement and the tabular and other disclosures on executive compensation contained in this proxy statement.

Accordingly, our Board is asking our stockholders to indicate their support for the compensation of our named executive officers as described in this proxy statement by casting a non-binding advisory vote “For” the following resolution:

“RESOLVED, that the compensation paid to the Company’s named executive officers, as disclosed pursuant to Item 402 of Regulation S-K, including the Compensation Discussion and Analysis, compensation tables and narrative discussion is hereby APPROVED.”

Because the vote is advisory, it is not binding on the Board or us. Nevertheless, the views expressed by the stockholders, whether through this vote or otherwise, are important to management and the Board and, accordingly, the Board and the Compensation Committee intend to consider the results of this vote in making determinations in the future regarding executive compensation arrangements.

Advisory approval of this proposal requires the vote of the holders of a majority of the shares present online or represented by proxy and entitled to vote at the annual meeting. Abstentions will be counted toward the tabulation of votes cast on proposals presented to the stockholders and will have the same effect as negative votes. Broker non-votes are counted towards a quorum but are not counted for any purpose in determining whether this matter has been approved.

The Audit Committee of the Board has selected Ernst & Young LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023, and has further directed that management submit the selection of independent registered public accounting firm for ratification by the stockholders at the Annual Meeting. Ernst & Young LLP has audited the Company’s financial statements since 1998. Representatives of Ernst & Young LLP are expected to be present at the Annual Meeting. They will have an opportunity to make a statement if they so desire and will be available to respond to appropriate questions.

Neither the Company’s Bylaws nor other governing documents or applicable law require stockholder ratification of the selection of Ernst & Young LLP as the Company’s independent registered public accounting firm. However, the Audit Committee of the Board is

submitting the selection of Ernst & Young LLP to the stockholders for ratification as a matter of good corporate practice. If the stockholders fail to ratify the selection, the Audit Committee of the Board will reconsider whether or not to retain that firm. Even if the selection is ratified, the Audit Committee of the Board, in its discretion, may direct the appointment of a different independent registered public accounting firm at any time during the year if they determine that such a change would be in the best interests of the Company and its stockholders.

The affirmative vote of the holders of a majority of the shares present online or represented by proxy and entitled to vote at the Annual Meeting will be required to ratify the selection of Ernst & Young LLP. Abstentions will be counted toward the tabulation of votes cast on this proposal and will have the same effect as negative votes.

In connection with the audit of the 2022 financial statements, the Company entered into an engagement agreement with Ernst & Young LLP that sets forth the terms by which Ernst & Young LLP will perform audit and interim review services for the Company, which engagement agreement is subject to alternative dispute resolution procedures.

The following table represents aggregate fees billed to the Company for the fiscal years ended December 31, 2022 and December 31, 2021 by Ernst & Young LLP, the Company’s independent registered public accounting firm (in thousands).

“Audit fees” consist of fees billed for professional services rendered for the audit of our financial statements and review of the interim financial statements included in quarterly reports and services that are normally provided by Ernst & Young LLP in connection with statutory and regulatory filings or engagements. Audit fees in 2022 and 2021 included $149,000 and $184,500, respectively, in fees associated with the set-up of our “at the market” public offering facility.

“Audit-related fees” consist of fees billed for assurance and related services that are reasonably related to the performance of the audit or review of our

financial statements and are not reported under “Audit Fees.” No such fees were billed during either fiscal year 2022 or 2021.

“Tax fees” include fees for tax compliance, tax planning and tax advice. No tax fees were billed in 2022 or 2021.

“All other fees” consist of fees for products and services other than the services described above.

All fees described above were approved by the Audit Committee.

The Audit Committee pre-approves all audit and permissible non-audit services rendered by our independent registered public accounting firm, Ernst & Young LLP. These services may include audit services, audit-related services, tax services and other services. Pre-approval may be given as part of the Audit Committee’s approval of the scope of the engagement of the independent registered public accounting firm, or on an individual, explicit case-by-case basis, before the independent registered public accounting firm is

engaged to provide each service. The pre-approval of services may be delegated to one or more of the Audit Committee’s members, but the decision must be reported to the full Audit Committee at its next scheduled meeting.

The Audit Committee has determined that the rendering of the services other than audit services by Ernst & Young LLP is compatible with maintaining the principal accountant’s independence.

Set forth below is the name, position and a brief summary of the business experience of each of our

current executive officers, as well as his or her age as of April 14, 2023.

Raul R. Rodriguez’s biography is set forth under the heading “Proposal 1 - Election of Directors” above.

Dean L. Schorno, age 60, was appointed as Executive Vice President and Chief Financial Officer (CFO) in May 2018. Mr. Schorno joined Rigel from 23andMe, Inc., the leading consumer genetics and research company, where he had been CFO since 2015. Before joining 23andMe, Mr. Schorno was CFO of Adaptive Biotechnologies (Seattle, WA) and Genomic Health (Redwood City, CA). During this time, he led financial operations through periods of significant business and commercial growth which included significant financing and commercial transaction activity. Mr. Schorno began his career in finance at an international accounting firm in San Francisco, CA before starting his own consultancy in 1991. A certified public accountant, Mr. Schorno is a graduate of the University of California, Berkeley (BS, Business Administration) and Golden Gate University (MS, Taxation).

Raymond J. Furey age 55, was appointed Executive Vice President, General Counsel and Corporate Secretary in December 2022. In his prior positions, Mr. Furey oversaw various companies’ legal affairs and managed their in-house legal teams. Mr. Furey joined Rigel from Turning Point Pharmaceutics, where he held the role of Senior Vice President, Chief Compliance Officer from March 2021 to August 2022 and served as Interim General Counsel in 2022. Prior to joining Turning Point Pharmaceutics, Mr. Furey held various positions including Chief Operating Officer at Ara Pharmaceuticals from September 2020 to March 2021. Prior to that, he was Senior Vice President and Chief Compliance Officer at Portola Pharmaceuticals from August 2017 to September 2020. He has held

other senior level positions at Mallinckrodt Pharmaceuticals and Questor Pharmaceuticals. Additionally, Mr. Furey held the position of Corporate Compliance Officer at OSI Pharmaceuticals, and various other positions at Genentech. He holds a bachelor’s degree from Trinity College in Dublin, Ireland, an MBA from San Francisco State University, and a J.D. from Fordham University School of Law.

David A. Santos David A Santos, age 60, was appointed Executive Vice President and Chief Commercial Officer in August 2020. Mr. Santos joined Rigel from Jazz Pharmaceuticals, where he held the role of hematology/oncology business unit head, responsible for leading us commercialization of the oncology portfolio from January 2016 to July 2020. During his tenure at Jazz, he successfully grew the business unit through three launches to eventually have four promoted products in the leukemia, transplant and lung cancer markets. Prior to joining Jazz, from January 2014 to May 2015, Mr. Santos served as Vice President of sales and marketing for Medivation (now Pfizer), responsible for commercializing Xtandi for metastatic prostate cancer, and Vice President, kinase inhibitor franchise for Onyx (now Amgen), responsible for leading sales and marketing efforts with Nexavar and Stivarga. Before his work at Onyx, Mr. Santos served for nearly 9 years in roles of increasing responsibility at Genentech, Inc., where he launched and held key commercial leadership roles on several successful brands, including Avastin, Herceptin and Tarceva. Mr. Santos also held marketing and sales roles at Lilly Oncology and Bristol-Myers Squibb, where he started his pharmaceutical sales career. He received his BS in chemistry from St. Louis University.

As of January 31, 2023, stock options and RSUs covering an aggregate of 38,634,704 shares of common stock were outstanding under the 2018 Plan and the Inducement Plan (35,877,851 under the 2018 Plan, and 2,756,853 under the Inducement Plan) and 7,191,148 shares of common stock (plus any shares that might in the future be returned to the 2018 Plan as a result of the repurchase of shares or the cancellation or expiration of options) remained available for future grant under the 2018 Plan (7,191,148 shares under the 2018 Plan and 0 shares under the Inducement Plan). The weighted average exercise price of all stock options outstanding as of January 31, 2023 was approximately $2.60 ($2.58 for shares under the 2018 Plan and $2.85 for shares under the Inducement Plan),

and the weighted average remaining term of such options was approximately 6.54 years (6.44 years under the 2018 Plan and 7.68 years under the Inducement Plan). Except as set forth above, as of January 31, 2023, there were no shares of common stock that were subject to issuance upon the exercise of outstanding non-compensatory warrants and no other shares were subject to issuance upon the conversion of any convertible securities. A total of 173,653,353 shares of common stock were outstanding as of the Record Date.

The following table provides certain information with respect to all of the Company’s equity compensation plans in effect as of December 31, 2022.

The following table sets forth certain information regarding the ownership of the Company’s common stock as of January 31, 2023 by: (i) each director and nominee for director; (ii) each of the executive officers named in the Summary Compensation Table; (iii) all executive officers and directors of the Company as a

group; and (iv) all those known by the Company to be beneficial owners of more than five percent of its common stock. Unless otherwise indicated, the address for each beneficial owner listed below is: c/o Rigel Pharmaceuticals, Inc., 611 Gateway Boulevard, Suite 900, South San Francisco, CA 94080.

From a business perspective, 2022 was a productive year for Rigel, both clinically and commercially. Since the beginning of 2022 our strategic, clinical, and commercial efforts yielded the following significant events:

Our executive officer compensation program is grounded in a pay-for-performance philosophy and is intended to meet three principal objectives:

Our Compensation Committee has determined that these three principal components, with a substantial portion of total compensation allocated to “at-risk” incentives through the use of annual and long-term incentive compensation, best align the interests of our executive officers with those of our stockholders.

As illustrated in the chart below, for 2022, approximately 75% of the target compensation of our President and Chief Executive Officer was variable and is realized only if the applicable performance goals are met and/or our stock price increases:

Our Compensation Committee values the opinions of our stockholders and considers the outcome of each non-binding advisory stockholder vote on the compensation program for our named executive officers, commonly referred to as a “say-on-pay” vote, when we make compensation decisions for the members of our executive team, including the Named Executive Officers.

Stockholder support for our recent say-on-pay votes has been consistently strong, with over 93% of the votes cast in each year since 2018. As part of its

review of the Company’s executive compensation program, the Compensation Committee considered the approval by approximately 94% of the votes cast for the Company’s say-on-pay vote at our 2022 annual meeting of stockholders. The Compensation Committee determined that the Company’s executive compensation philosophy and objectives and compensation elements continued to be appropriate and did not make any changes to the Company’s executive compensation program in response to the 2022 say-on-pay vote.

Consistent with our executive compensation philosophy and program objectives, in determining the 2022 target compensation levels and mixture of compensation elements for each Named Executive Officer, the Compensation Committee and Mr. Rodriguez (other than with respect to his own compensation) considered, as applicable, Company performance, individual performance, position and level of responsibility, market demand and retention

considerations, the competitive market as reflected in our peer group, and the Company’s financial, strategic, and operational goals. We believe that our 2022 executive compensation program was reasonable and consistent with our financial performance, the individual performance of each of our Named Executive Officers, and the overall achievement of the goals that we believe create and enhance stockholder value.

Each year, the Compensation Committee establishes an annual cash incentive plan, providing target bonus payouts based on a percentage of the applicable individual’s base salary. In 2022, we provided our Named Executive Officers with the opportunity to earn short-term incentive compensation under the 2022 Cash Incentive Plan (the “2022 Cash Plan”).

Under the 2022 Cash Plan, cash bonuses become payable based upon the achievement of corporate goals and a review of personal performance, with performance determinations made at the discretion of the Compensation Committee. For each participant in the 2022 Cash Plan, the corporate performance goals related to the Company’s financial and operational performance. The corporate goals established under

the 2022 Cash Plan reflect the Company’s continued belief that executive compensation should be tied to goals related to net sales growth, clinical development, and regulatory approval with respect to current or potential product candidates, business development, our cash position, and our pipeline of potential product candidates, which goals are designed to support stockholder value creation, taking into account the volatile nature of the Company’s industry. The corporate goals reviewed by our Compensation Committee and subsequently approved by the Board under the 2022 Cash Plan were designed to be challenging, but attainable with strong management performance.

The 2022 Cash Plan provides the Compensation Committee and the Board with the discretion to adjust the actual bonus that an executive officer would be eligible to receive under the plan from 0% to 200% of the executive’s “Target Bonus (%)” shown in the “Named Executive Officer” table below. Pursuant to its

discretionary authority, our Compensation Committee also considered other company and individual performance goals, current economic conditions, and the performance by each executive officer when evaluating whether and to what extent to award bonuses.

The Company provides long-term incentive compensation to its Named Executive Officers in the form of stock option and RSU awards, which awards are designed to align a component of our executive compensation program with the interests of our stockholders to create long-term value in the Company, as demonstrated through stock price performance. The 2022 equity awards were granted under the Company’s 2018 Equity Incentive Plan, as amended from time to time (the “2018 Equity Plan”) or, in the case of Mr. Furey’s new hire stock option award, the Rigel Pharmaceuticals, Inc. Inducement Plan (the “Inducement Plan”)

In January 2022, the Compensation Committee determined the number of equity awards to be granted to each then-serving Named Executive Officer based upon each such executive’s individual contributions and past performance, vesting status of options already held by the executive, position with the Company, and comparison to the equity awards granted to the corresponding executives of our peer companies, as well as our performance during the preceding year. In January 2022, after consideration of these factors, the Compensation Committee

approved the grant of stock options and RSU awards to each of the then-serving Named Executive Officers as set forth in the table below. Exercise prices for each stock option were set at the fair market value of the common stock on the date of grant.

For stock options granted to the Named Executive Officers in 2022, 1/2 of these stock options are subject to time-based vesting on a monthly basis over four years, while the remaining 1/2 of the stock options are subject to performance-based vesting criteria once applicable performance goals relating to regulatory approvals and progress of certain clinical trials, each equally weighted, have been satisfied. The performance goals for the performance-based options were designed to be challenging, yet attainable with strong management performance. In each case, vesting of any such stock options is subject to the executive’s continuous service to the Company through the applicable vesting date. For RSU awards granted to the then-serving Named Executive Officers in January 2022, these RSUs are subject to time-based vesting in equal annual installments over four years, with a vesting commencement date of February 1, 2022.

In January 2019, each of Messrs. Rodriguez and Schorno and Ms. Vance received awards of stock options subject to performance-based vesting criteria relating to net sales growth of TAVALISSE and progress of clinical trials, which progress includes moving product candidates forward ourselves or with a partner. In August

2020 and October 2021, Dr. Dummer received awards of stock options subject to performance-based vesting criteria relating to clinical trial progress. In addition, in January 2022, each of the then-serving Named

Offer Letter Agreements. The Company has entered into offer letter agreements with each of Messrs. Dummer, Schorno, Santos and Furey. These offer letters describe the basic terms of each executive’s employment, including each executive’s initial base salary, annual bonus target, initial long-term equity incentive grant, eligibility for severance, and standard Company benefits. The terms of the offer letters are described in further detail under “Employment Severance and Change of Control Agreements” below.

Retention Agreements. The Company entered into a retention letter agreement with Dr. Dummer, effective January 1, 2022, which provided for a $100,000 cash retention bonus to be paid to Dr. Dummer subject to his continued employment with the Company until December 31, 2022. Prior to entering into the retention letter agreement, the Company implemented a workforce reduction in November 2021, which necessitated the retention of certain key employees to avoid disruption to its development programs. Dr. Dummer’s leadership role as Chief Medical Officer was deemed essential to the Company achieving its goals. The Compensation Committee approved the retention letter agreement with Dr. Dummer to secure his continued service in anticipation of critical clinical and regulatory activities. His role was instrumental in producing top-line results for our Phase 3 clinical trials in COVID-19 and wAIHA, and the approval of Rezlidhia during the retention period.

Severance and Change of Control Benefits. Pursuant to the Rigel Pharmaceuticals, Inc. Executive

Severance Plan (the “Severance Plan”), our Named Executive Officers are entitled to certain severance benefits in the event of an involuntary termination by the employer without cause or resignation by the employee with good reason, which severance benefits are enhanced in the event of such a qualifying termination which occurs on or within 18 months following a “Change of Control” (as defined in the Severance Plan). For each of our Named Executive Officers, the Severance Plan provides for a combination of (i) cash severance payments, (ii) payment of COBRA premiums, (iii) accelerated vesting of certain outstanding equity-based awards, and (iv) an extended exercise period for stock options upon termination. These severance payment terms differ depending on (i) whether such termination takes place within the Change of Control period, and (ii) the Named Executive Officer’s position. As noted above, during 2022, Ms. Vance retired from the Company and her retirement was deemed a Non-COC Qualifying Termination under the Severance Plan entitling her to benefits under the Severance Plan. In addition, in recognition of her performance during 2022, including her assistance in the exclusive license and supply agreements with Knight Therapeutics for the commercialization of fostamatinib in Latin America, as well as the in-licensing agreement with Forma Therapeutics for olutasidenib, the Company agreed to pay Ms. Vance a bonus at slightly less than her pro rata target bonus for the portion of the year that she was with the Company and in recognition of her offer to continue to consult with the Company following her

termination of employment, and to extend her post-termination exercise period of any then-outstanding stock options until the original contractual term of such option (generally 10 years from the date of grant). Please see the sections entitled “Employment, Severance and Change of Control Agreements,” “2022 Potential Payments Upon Change in Control and Termination Table,” and “2022 Potential Payments Upon Termination Table” for further information regarding the benefits payable under the Severance Plan, including the severance benefits received by Ms. Vance in connection with her separation from the Company.

Given the nature of the industry in which we participate and the range of strategic initiatives that we may explore, we believe these severance benefits are an essential element of our executive compensation program and assist us in recruiting and retaining talented individuals. The Severance Plan also reduces the need to negotiate individual severance arrangements with departing executives and protects our executives from termination for circumstances not of their doing. We also believe the Severance Plan promotes management independence and helps retain, stabilize, and focus the executive officers in the event of a change of control. By establishing these severance and change of control benefits, we believe we can mitigate the distraction and loss of executive officers that may occur in connection with rumored or actual fundamental corporate changes and thereby protect shareholder interests while a transaction is under consideration or pending.

Perquisites and Other Benefits. We provide general employment benefits to our executive officers on the same basis as the benefits provided to all of our

employees, including health, vision, and dental insurance, term life insurance, and short-term and long-term disability insurance.

Incentive Compensation Recoupment Policy. The Company maintains a Clawback Policy, which applies to individuals designated by the Board as executive officers for purposes of Section 16 of the Exchange Act. Our policy generally provides that, in the event that (i) an incentive compensation payment or award (or the vesting of such award) was based upon the achievement of financial results that were subsequently the subject of a restatement to correct an accounting error due to material noncompliance with any financial reporting requirement under the federal securities laws (other than corrections resulting from changes to accounting standards) and (ii) a lower incentive compensation payment or award would have been made to such officer (or lesser or no vesting would have occurred with respect to such award) based upon the restated financial results, then we will recover the full or partial portion of cash or equity-based incentive compensation received by such officer during the three fiscal years preceding the date on which we were required to prepare the restatement. Our policy is separate from and in addition to the requirements of Section 304 of the Sarbanes-Oxley Act of 2002 that are applicable to our Chief Executive Officer and Chief Financial Officer.

Anti-Hedging Policy. The Company’s anti-hedging policy prohibits our employees and directors, as well as certain designated consultants and contractors, from engaging in short sales, transactions in put or call options, hedging transactions, margin accounts, pledges, or other inherently speculative transactions with respect to our stock.

Our Compensation Committee reviews and approves our executive compensation philosophy, objectives and methods, evaluates our performance and the performance of our executive officers, and either approves executive compensation or makes recommendations for ratification by our independent Board members. The members of our Compensation Committee are appointed by our Board, and each member is an independent director (as “independence” is currently defined in Rule 5605(a)(2) of the Nasdaq listing rules). In 2022, the members of our Compensation Committee were Dr. Moos, Mr. Lyons (who served on the Compensation Committee until March 15, 2022), Ms. Ali-Jackson (who served on the Compensation Committee

beginning on March 15, 2022), Ms. Wasman (who served on the Compensation Committee from March 15, 2022 until May 19, 2022), Mr. Katkin (who served on the Compensation Committee until May 19, 2022), and Mr. Lapointe (who served on the Compensation Committee beginning as of May 19, 2022).

Our Compensation Committee typically meets at least quarterly, and with greater frequency, if necessary, to evaluate the performance of our executive officers and the impact that performance had on the achievement of our corporate strategies, business objectives, and the long-term interests of our stockholders by:

For executive compensation decisions, our Compensation Committee considers the recommendations of our President and Chief Executive Officer, Raul R. Rodriguez (except with respect to decisions regarding Mr. Rodriguez’s own compensation). Mr. Rodriguez annually leads the development of our corporate objectives and goals, which are typically reviewed and recommended by our Compensation Committee and approved by the Board. Alternatively, our Compensation Committee may set the corporate objectives and goals pursuant

to the powers delegated under the charter of our Compensation Committee. Mr. Rodriguez provided the Company’s business and operations perspective for our Compensation Committee’s final review of progress made on the goals set for 2022. Our VP, Human Resources also provides our Compensation Committee with general and company-specific information regarding compensation matters, as well as updates on compensation of our peer companies, as public information becomes available, if requested by the Compensation Committee.

The Compensation Committee previously retained the services of Radford and changed its independent compensation consultant in July 2022 to Pearl Meyer. References in this disclosure to “Compensation Consultant” refer to Radford and Pearl Meyer during their applicable period of service during 2022 as the Compensation Committee’s independent compensation consultant. With respect to 2022 executive compensation, the Compensation Consultant analyzed our executive officers’ compensation against the compensation of executive officers at comparable companies to ensure that our compensation was competitive with our peers, with the goal of retaining and adequately motivating our

senior management and made recommendations regarding our executive compensation program. The Compensation Consultant was invited to attend certain Compensation Committee meetings during 2022 during which they presented and discussed their analysis and findings. Other than services provided to the Compensation Committee, the Compensation Consultant did not provide any services to the Company with respect to 2022. The Compensation Committee reviewed the independence of the Compensation Consultant under Nasdaq and SEC rules and concluded that the work of the Compensation Consultant has not raised any conflict of interest.

When considering compensation decisions, our Compensation Committee reviews the compensation of similarly situated executive officers at companies that we consider to be our peers, when such information is available and determined to be meaningful, taking into consideration the experience, position, and functional role, level of responsibility and

uniqueness of applicable skills of both our executive officers and those of our peers, and the demand and competitiveness for attracting and retaining an individual with each executive officer’s specific expertise and experience in the biotechnology industry.