Rigel (NASDAQ: RIGL) EVP uses shares to cover tax obligations

Rhea-AI Filing Summary

RIGEL PHARMACEUTICALS INC executive David A. Santos, EVP and Chief Commercial Officer, reported a small share disposition related to taxes. On this date, 874 shares of common stock were delivered at $29.86 per share to cover tax obligations. After this tax-withholding event, Santos directly holds 61,996 shares of common stock, indicating that his overall ownership position remains largely unchanged.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Santos David A

Role EVP, Chief Commercial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	874	$29.86	$26K

Holdings After Transaction: Common Stock — 61,996 shares (Direct, null)

Footnotes (1)

Key Figures

Tax-withheld shares: 874 shares Price per share: $29.86 per share Shares held after transaction: 61,996 shares +2 more

5 metrics

Tax-withheld shares 874 shares Shares delivered to cover tax obligations

Price per share $29.86 per share Value assigned to tax-withheld shares

Shares held after transaction 61,996 shares Direct common stock ownership after tax withholding

Tax-withholding transactions 1 event Single tax-withholding disposition reported

Tax-withholding shares total 874 shares Total shares used for tax withholding in this report

Key Terms

tax-withholding disposition, Common Stock, Payment of exercise price or tax liability by delivering securities

3 terms

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Payment of exercise price or tax liability by delivering securities financial

"transaction_code_description: "Payment of exercise price or tax liability by delivering securities""

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Santos David A

(Last) (First) (Middle)

RIGEL PHARMACEUTICALS, INC.

611 GATEWAY BLVD, SUITE 900

(Street)

SOUTH SAN FRANCISCO CALIFORNIA 94080

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
RIGEL PHARMACEUTICALS INC [ RIGL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Chief Commercial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/01/2026		F		874	D	$29.86	61,996	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Raymond Furey (Attorney-in-Fact)	06/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did RIGL executive David A. Santos report?

David A. Santos reported a tax-related share disposition of Rigel Pharmaceuticals stock. He delivered 874 common shares to satisfy tax obligations, a routine mechanism rather than an open-market sale, and retained 61,996 shares afterward.

How many RIGL shares were used for tax withholding by David A. Santos?

David A. Santos used 874 common shares of Rigel Pharmaceuticals for tax withholding. These shares were valued at $29.86 each, reflecting a non-market disposition tied to tax obligations, not a discretionary buy or sell decision.

What is David A. Santos’s Rigel Pharmaceuticals shareholding after this transaction?

After the tax-withholding disposition, David A. Santos directly holds 61,996 Rigel Pharmaceuticals shares. This figure shows his remaining ownership position following the delivery of 874 shares to cover tax liabilities associated with equity compensation.

Was the RIGL insider transaction an open-market sale of shares?

No, the transaction was a tax-withholding disposition, not an open-market sale. Shares were delivered to cover tax liabilities, a mechanical step often linked to equity awards, rather than an active decision to sell shares on the market.

What role does David A. Santos hold at Rigel Pharmaceuticals?

David A. Santos serves as Executive Vice President and Chief Commercial Officer at Rigel Pharmaceuticals. His reported transaction relates to his equity compensation, with shares delivered to satisfy tax obligations while he continues to hold a substantial position.