Jeffrey Stein - 02 Mar 2026 Form 4 Insider Report for IDEAYA Biosciences, Inc. (IDYA)

Reporting relationship: Director
Issuer ticker: IDYA
Reported as of: 02 Mar 2026
Net transaction value: +$1,647,890
SEC form: 4
Accepted by SEC: 02 Mar 2026, 19:18:09 UTC
Prior SEC filing: 07 Jan 2026
Next SEC filing: 18 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Douglas Snyder, as Attorney-in-Fact for Jeffrey Stein

Key filing fact

Jeffrey Stein filed Form 4 for IDEAYA Biosciences, Inc. (IDYA) on 02 Mar 2026.

Key facts

This page summarizes Jeffrey Stein's Form 4 filing for IDEAYA Biosciences, Inc. (IDYA).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 02 Mar 2026, 19:18.

Change

Previous filing in this sequence was filed on 07 Jan 2026.
Current net transaction value: +$1,647,890.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001478831 Primary reporting owner

Stein Jeffrey

Relationship: Director
Address: C/O IDEAYA BIOSCIENCES, INC., 5000 SHORELINE COURT, SUITE 300, SOUTH SAN FRANCISCO
Signature: /s/ Douglas Snyder, as Attorney-in-Fact for Jeffrey Stein
Signature date: 02 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

IDYA transaction

Common Stock

Purchase

Transaction value: $1,647,890
Shares: +50,000
Change %: +1168%
Price: $32.96
Shares after: 54,281
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1

IDYA holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,363
Date: 02 Mar 2026
Ownership: By Son

IDYA holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,363
Date: 02 Mar 2026
Ownership: By Son

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

This transaction was executed in multiple trades in prices ranging from $32.743 to $33.1999, inclusive. The price reported in Column 4 above reflects the weighted average purchase 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 purchased at each respective price within the range set forth in this footnote.