Form 4 Filing for APPLIED OPTOELECTRONICS, INC.

On June 18, 2026, Yeh Shu-Hua (Joshua), Senior Vice President and Asia General Manager of APPLIED OPTOELECTRONICS, INC., sold 6,000 shares of common stock with a par value of $.001. The sales were executed under a Rule 10b5-1 trading plan, with prices ranging from $171.00 to $173.51 per share. The reported weighted average sale price was $171.89. Following these transactions, Yeh Shu-Hua (Joshua) holds 394,207 shares of the company's common stock. This filing is a disclosure of insider transactions and is not subject to Section 16 of the Securities Exchange Act.