144 0001786101 XXXXXXXX LIVE 0001387467 ALPHA AND OMEGA SEMICONDUCTOR LIMITED 001-34717 Clarendon House, 2 Church Street Hamilton D0 HM 11 (408) 830-9742 CLAUDIA CHEN Director Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

4061 160536.20 29929578 05/22/2026 NASDAQ Common 02/28/2023 Restricted Stock ISSUER N 4061 02/28/2023 Not Applicable Y The securities to be sold were acquired upon the vesting of restricted stock during the period of 2/28/2023 through 11/29/2023. 05/22/2026 02/20/2026 /s/ Claudia Chen