Chang Mike F 4

4 · ALPHA & OMEGA SEMICONDUCTOR Ltd · Filed May 28, 2026

AI-generated summary of this filing

Updated May 28, 2026

AOSL 10% Owner Mike Chang Gifts 39,780 Shares

What Happened

Mike Chang, a 10% owner of Alpha & Omega Semiconductor Ltd (AOSL) and trustee of the CHANG TRUST, reported gifting 39,780 common shares on May 26, 2026. Transaction reported on Form 4 shows a disposition via Gift (code G) at $0.00 per share (total reported value $0). The filing notes Chang remains the trustee and beneficial owner of the securities held by the trust, and immediate family members are the trust beneficiaries.

Key Details

Transaction date: 2026-05-26. Form filed: 2026-05-28 (appears timely; filed two days after the transfer).
Transaction type/code: Gift (G). Price per share: $0.00. Total reported value: $0.
Shares transferred: 39,780 common shares to the CHANG TRUST.
Shares owned after transaction: not numerically specified in the provided filing; filing states Chang remains beneficial owner of trust-held shares.
Relevant footnotes:
- F1: Transfer to CHANG TRUST for no consideration; reporting person is trustee and family are sole beneficiaries; reporting person remains beneficial owner.
- F2–F4: Reporting person’s holdings include multiple unvested awards: 35,625 PSU (grants 2024/2025), 45,000 MSU (2018), and an aggregate 67,500 RSUs (grants 2023–2026); 22,500 unvested PSU from March 16, 2026 are excluded from that RSU total.

Context

A gift to a family trust is a non-market transaction and does not necessarily indicate the insider’s view on the stock. As a 10% owner and trustee who remains the beneficial owner of the shares in the trust, this is largely an estate/tax/ownership-structure move rather than a typical buy/sell trade.

Form 4

Period: 2026-05-26

Director10% Owner

Transactions

Holdings

Footnotes (4)

[F1]On May 26, 2026, the reporting person transferred 39,780 common shares to the CHANG TRUST for no consideration. The reporting person is the trustee of the trust, and members of the reporting person's immediately family are the sole beneficiaries of the trust. The reporting person remains the beneficial owner of the securities held by the trust.
[F2]Includes 35,625 unvested shares subject to the Performance Share Unit (PSU) granted on March 15, 2024 and March 17, 2025 which are subject to vesting upon satisfaction of service-based vesting conditions by the Reporting Person.
[F3]Includes 45,000 unvested shares subject to the Market-Based Performance Share Unit (MSU) granted on July 1, 2018 which are subject to vesting upon satisfaction of service-based vesting conditions by the Reporting Person.
[F4]Includes an aggregate of 67,500 shares subject to Restricted Share Unit awards (RSU) granted on March 15, 2023, March 15, 2024, March 17, 2025, and March 16, 2026 which will be issued as such units vest in accordance with their terms, and excludes 22,500 unvested common shares subject to the PSU granted on March 16, 2026, which may become vested upon achievement of certain corporate performance goals in the future.

Signature

/s/ Yanbing Hong, attorney-in-fact for Mike F. Chang|2026-05-28

1 file