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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1676725	Ideaya Biosciences Inc.	IDYA	Pharmaceutical Preparations (2834)	474268251

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1777511	A. Paul Stone	C/O Ideaya Biosciences, Inc. 7000 Shoreline Court, Suite 350 South San Francisco CA 94080	Chief Financial Officer	No	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2023-08-16	100	$26.45	19,203	No	4	S	Direct
Common Stock	Disposition	2023-08-16	100	$26.40	19,103	No	4	S	Direct
Common Stock	Disposition	2023-08-18	3,822	$26.38	15,281	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Footnotes

The transactions reported herein were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan, adopted on March 27, 2023.
This transaction was executed in multiple trades in prices ranging from $26.37 to $26.415, 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.