Form 4 Filing for Alpha & Omega Semiconductor Ltd.

This filing details a transaction by Stephen Chang, CEO of ALPHA & OMEGA SEMICONDUCTOR Ltd. (AOSL). On May 21, 2026, Mr. Chang disposed of 2,000 common shares with a transaction price of $0.00. Following this transaction, he holds 634,070 shares. The filing also notes various unvested shares subject to Market-Based Performance Share Units (MSUs), Performance Share Units (PSUs), and Restricted Share Unit awards (RSUs) with different vesting conditions and grant dates. Additionally, 169 shares were acquired under the Issuer's Employee Stock Purchase Plan on May 14, 2026. The footnotes provide further details on the conditions and nature of these share holdings and grants.