X0508 4 2025-08-22 0 0001158114 APPLIED OPTOELECTRONICS, INC. AAOI 0001199697 BLACK RICHARD B C/O APPLIED OPTOELECTRONICS, INC. 13139 JESS PIRTLE BLVD. SUGAR LAND TX 77478 1 0 0 0 0 Common Stock, $.001 par value 2025-08-22 4 G 0 1900 0.00 D 168194 I By Trust Represents a bona fide gift of shares to a 501(c)(3) non-profit organization by The Richard B. Black Revocable Trust U/A Dtd. Aug 31, 1998; Richard B. Black TTEE. The shares were held by the Reporting Person in a revocable living trust of which the Reporting Person is the sole trustee and beneficial owner. The effect of this amendment is that, 1,900 shares of Common Stock should be deducted in reporting the total number of shares beneficially owned by the Reporting Person on November 26, 2025. /s/ David C. Kuo, attorney in fact for Richard B. Black 2026-01-05