Form 4 Filing for APPLIED OPTOELECTRONICS, INC.

This filing details several transactions by Lin Chih-Hsiang (Thompson), President and CEO of APPLIED OPTOELECTRONICS, INC., on April 22, 2026. A total of 16,572 shares of common stock were disposed of, each at a price of $150.57 per share. These disposals were to satisfy tax-withholding obligations related to the vesting of restricted stock unit awards granted on June 26, 2023, April 29, 2024, April 11, 2025, and February 9, 2026, as indicated by footnotes F1 through F4. Following these transactions, the post-transaction number of shares owned by Mr. Lin is reported to be 1,688,605.