Form 4 Filing for ALPHA & OMEGA SEMICONDUCTOR Ltd

Mike F. Chang, a director and 10% owner of ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL), reported a disposition of 30,000 Common Shares on June 1, 2026, with a transaction code indicating a gift (G). The shares were disposed of, resulting in a post-transaction ownership of 3,584,294 shares. This disposition is noted with footnotes F1, F2, and F3, which refer to unvested shares subject to Performance Share Unit (PSU) and Market-Based Performance Share Unit (MSU) grants, as well as Restricted Share Unit (RSU) awards. Additionally, Chang holds 776,032 Common Shares indirectly through CHANG TRUST. The filing was signed on June 3, 2026, by an attorney-in-fact for Mike F. Chang.