A Form 4 filed on August 19, 2026 with the U.S. Securities and Exchange Commission discloses that Chih-Hsiao Chung, an officer of ASE Technology Holding Co., Ltd. (NYSE:ASX), exercised stock options to acquire ordinary shares on August 12 and August 13, 2026.

Key Highlights

  • Reporting person: Chih-Hsiao Chung, identified in the filing as GM, ASE Japan & Wuxi Tongzhi.
  • First transaction (08/12/2026): 292,000 ordinary shares acquired via stock option exercise (transaction code M) at an exercise price of NT$41.1.
  • Second transaction (08/13/2026): 73,000 ordinary shares acquired via stock option exercise (transaction code M) at an exercise price of NT$41.1.
  • Post-transaction ownership: Following both transactions, Chung beneficially owned 395,000 ordinary shares directly.
  • Option grant date: The exercised stock options were granted on November 23, 2018, and are described as "fully vested and exercisable," expiring November 22, 2028.
  • Derivative securities remaining: After both exercises, zero stock options remain beneficially owned by the reporting person.

Chih-Hsiao Chung's Option Exercises and Resulting Ownership at ASE Technology

According to the filing, Chih-Hsiao Chung, serving as GM of ASE Japan & Wuxi Tongzhi at ASE Technology Holding Co., Ltd. (NYSE:ASX), exercised stock options on two consecutive trading days in August 2026. On August 12, 2026, the officer exercised options covering 292,000 ordinary shares at an exercise price of NT$41.1, bringing directly held beneficial ownership to 322,000 shares following that transaction. The filing notes the exercise price "reflects New Taiwan dollars."

On August 13, 2026, the filing discloses a second exercise of 73,000 options, also at NT$41.1 per share, bringing the total directly held beneficial ownership to 395,000 ordinary shares. Both transactions carry transaction code M, indicating exercises of derivative securities. The filing states the options "were granted on November 23, 2018 and are fully vested and exercisable," with an expiration date of November 22, 2028. The price of the derivative security for both exercises is listed as $0.

After these two exercises, the filing reports that Chung holds zero stock options remaining. The Form 4 was signed by Georgette Yeh as attorney-in-fact for Chih-Hsiao Chung and filed on August 19, 2026. The filing was made by one reporting person and indicates direct ownership for all reported securities.

What Was Disclosed

The filing reports two stock option exercises by ASE Technology officer Chih-Hsiao Chung on August 12 and 13, 2026, covering a combined 365,000 ordinary shares at NT$41.1 per share, resulting in direct beneficial ownership of 395,000 shares and zero remaining options.