IDEAYA Biosciences, Inc. 4

Chief Accounting Officer Andres Ruiz Briseno exercised 9,550 stock options at $12.86 and sold 9,550 IDEAYA Biosciences (IDYA) common shares at about $40.01 on July 7, 2026 under a Rule 10b5-1 plan.

On July 7, 2026, IDEAYA Biosciences, Inc. Chief Accounting Officer Andres Ruiz Briseno exercised a stock option for 9,550 shares of common stock at an exercise price of $12.86 per share and immediately sold the same 9,550 shares in the open market at a weighted average price of $40.0137 per share pursuant to a Rule 10b5-1 trading plan adopted on December 19, 2025. The option exercise resulted in the acquisition of shares valued at approximately $122,863, while the subsequent sale generated proceeds of roughly $382,131, implying a spread of about $259,268 before taxes and transaction costs. After these transactions, the reporting person held 26,466 shares of common stock directly (worth an estimated $1.06 million using the $40.01 reference price) and continued to hold stock options covering 9,550 shares, fully vested and exercisable at $12.86 per share with an expiration date of March 1, 2032.

Filing Facts

CIK

1676725

Ticker

IDYA

Form

4

Source Type

fda

Accession

0001610717-26-000336

Alert Tier

6