IDEAYA Biosciences, Inc.

IDYA· Nasdaq

Since Oct 4, 2025

Transactions: 2
Purchases: 1
Sales: 1
Purchase value: $1.65M
Sale value: $382.13K

Values are shares multiplied by reported price when both were supplied, each trade counted once however many filers reported it.

Ruiz Briseno AndresChief Accounting Officer

4Rule 10b5-1 plan disclosed

Filed Jul 9, 2026Period of report Jul 7, 20260001610717-26-000336

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
SaleJul 7, 2026	Common Stock^F1^F2	9,550	$40.0137	$382.13K	26,466	Direct

Filing footnotes · 3

F1The transaction reported herein was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan, adopted on December 19, 2025.
F2This transaction was executed in multiple trades in prices ranging from $40.00 to $40.10, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.
F3100% of the shares subject to the option is fully vested and exercisable.

Open on SEC EDGAR

Stein JeffreyDirector

Filed Mar 2, 2026Period of report Mar 2, 20260001610717-26-000078

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
PurchaseMar 2, 2026	Common Stock^F1	50,000	$32.9578	$1.65M	54,281	Direct

P and S transaction codes only. Grants, gifts, option exercises, tax withholding, and Form 144 notices are not counted as purchases or sales. A row whose filed price fails a plausibility check, or that is not common stock, is listed but left out of the values; a trade reported by several filers is counted once.