144 0001865629 XXXXXXXX LIVE 0001158114 Applied Optoelectronics, Inc. 001-36083 13139 Jess Pirtle Blvd. Sugar Land TX 77478 281-295-1800 Cynthia DeLaney Director of Board Common Ameriprise

901 Third Avenue South Minneapolis MN 55402

21000 2058338.25 75198817 03/04/2026 NASDAQ Common 09/11/2023 Restricted Stock Unit Vesting Issuer N 538 09/11/2023 N/A Common 12/11/2023 Restricted Stock Unit Vesting Issuer N 10231 12/11/2023 N/A Common 03/11/2024 Restricted Stock Unit Vesting Issuer N 10231 03/11/2024 N/A Y 03/04/2026 /s/ David C. Kuo, attorney in fact for Cynthia DeLaney