Catherine J. Mackey - 16 Jun 2026 Form 4 Insider Report for IDEAYA Biosciences, Inc. (IDYA)

Reporting relationship: Director
Issuer ticker: IDYA
Reported as of: 16 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Jun 2026, 16:32:03 UTC
Prior SEC filing: 11 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Andres Ruiz Briseno, as Attorney-in-Fact for Catherine J. Mackey

Key filing fact

Catherine J. Mackey filed Form 4 for IDEAYA Biosciences, Inc. (IDYA) on 18 Jun 2026.

Key facts

This page summarizes Catherine J. Mackey's Form 4 filing for IDEAYA Biosciences, Inc. (IDYA).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 18 Jun 2026, 16:32.

Change

Previous filing in this sequence was filed on 11 Jun 2026.
Current net transaction value: $0.

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 0001645330 Primary reporting owner

MACKEY CATHERINE J

Relationship: Director
Address: C/O IDEAYA BIOSCIENCES, INC., 5000 SHORELINE COURT, SUITE 300, SOUTH SAN FRANCISCO
Signature: /s/ Andres Ruiz Briseno, as Attorney-in-Fact for Catherine J. Mackey
Signature date: 18 Jun 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

IDYA transaction Derivative

Stock Option (right to buy)

Award

Transaction value
Shares: +20,000
Change %
Price: $0.000000^*
Shares after: 20,000
Date: 16 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 20,000
Exercise price: $30.57
Footnotes: F1

^* 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

100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the date of grant and (ii) immediately prior to the Annual Meeting following the date of grant, subject to the Reporting Person continuing in service on the Board through such vesting date.