IDEAYA Biosciences (IDYA) awards 190,000 stock options to CSO

Rhea-AI Filing Summary

IDEAYA Biosciences granted its Chief Scientific Officer, Michael Anthony White, a stock option covering 190,000 shares of common stock on January 30, 2026. The option has an exercise price of $32.19 per share and is held directly by him.

According to the vesting terms, 25% of the option vests on the first anniversary of January 1, 2026, and the remaining shares vest in equal monthly installments over the following three years. This schedule makes the option fully vested and exercisable on the fourth anniversary of the vesting commencement date.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider WHITE MICHAEL ANTHONY

Role Chief Scientific Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	190,000	$0.00	--

Holdings After Transaction: Stock Option (right to buy) — 190,000 shares (Direct)

Footnotes (1)

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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^*

WHITE MICHAEL ANTHONY

(Last) (First) (Middle)

C/O IDEAYA BIOSCIENCES, INC.

5000 SHORELINE COURT, SUITE 300

(Street)

SOUTH SAN FRANCISCO CA 94080

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
IDEAYA Biosciences, Inc. [ IDYA ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Scientific Officer

3. Date of Earliest Transaction (Month/Day/Year)
01/30/2026

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

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

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

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

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
Stock Option (right to buy)	$32.19	01/30/2026		A		190,000		(1)	01/30/2036	Common Stock	190,000	$0	190,000	D

Explanation of Responses:

1. 25% of the shares subject to the option vest on the first anniversary measured from January 1, 2026 (the "Vesting Commencement Date"), and 1/48th of the total number of shares vest monthly thereafter, such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date.

	/s/ Joshua Bleharski, as Attorney-in-Fact for Michael Anthony White	02/02/2026
	** 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.

FAQ

What insider transaction did IDEAYA (IDYA) report for Michael Anthony White?

IDEAYA reported a grant of stock options to Chief Scientific Officer Michael Anthony White. He received options to purchase 190,000 shares of common stock at $32.19 per share, recorded as a direct beneficial holding following the January 30, 2026 transaction date.

What are the key terms of Michael Anthony White’s IDEAYA stock option grant?

The grant is a stock option for 190,000 shares of IDEAYA common stock at an exercise price of $32.19 per share. It was awarded on January 30, 2026 and is recorded as directly owned by Michael Anthony White as part of his officer compensation.

How do the IDEAYA stock options granted to Michael Anthony White vest?

The options vest over four years from a January 1, 2026 vesting start date. Twenty-five percent vest on the first anniversary, and the remaining shares vest in equal monthly installments so that 100% are vested on the fourth anniversary.

When will Michael Anthony White’s IDEAYA (IDYA) options be fully exercisable?

The options become fully exercisable on the fourth anniversary of January 1, 2026. Vesting occurs with 25% on the first anniversary and the rest in monthly installments, aligning complete vesting and exercisability with that fourth-anniversary date.

What is Michael Anthony White’s beneficial ownership from this IDEAYA option grant?

Following the reported transaction, Michael Anthony White beneficially owns 190,000 derivative securities in the form of stock options. These options give him the right to buy up to 190,000 IDEAYA common shares at $32.19 per share, subject to the vesting schedule.

Is Michael Anthony White’s IDEAYA option grant a direct or indirect holding?

The filing classifies the 190,000 stock options as directly owned by Michael Anthony White. There is no reference to an intermediary trust, partnership, or other entity in the ownership description, and no footnote disclaiming beneficial ownership or control.