Chang Hung-Lun (Fred) Sells 4,000 Shares of Common Stock

On June 5, 2026, Chang Hung-Lun (Fred), Senior Vice President and North America General Manager at APPLIED OPTOELECTRONICS, INC. (AAOI), sold 4,000 shares of common stock. The weighted average sale price was $200.07 per share, with actual sale prices ranging from $200.00 to $200.37. Following these transactions, Mr. Chang directly owns 387,750 shares of common stock. The reporting person has undertaken to provide full information regarding the number of shares sold during each transaction upon request.