Chang Hung-Lun (Fred) 4

What Happened
Fred Chang (Senior Vice President and North America General Manager) sold 36,400 shares of Applied Optoelectronics, Inc. (AAOI) in open-market transactions on March 16, 2026. The Form 4 reports a weighted-average sale price of $100.25 per share for total proceeds of $3,648,918.

Key Details

• Transaction date: March 16, 2026; Form 4 filed March 18, 2026 (timely filing).
• Reported sale: 36,400 shares at a weighted-average price of $100.25; total ≈ $3,648,918.
• Footnote: Shares were sold in multiple transactions at actual prices ranging $100.00–$100.80; the reported price is a weighted average (reporting person will provide per-transaction details upon request).
• Ownership after transaction: Not specified in this filing.
• Transaction type code: S (sale — open market or private sale). No option exercises, awards, or gifts reported.

Context
This filing documents an outright sale of existing shares. Sales by insiders can be routine (e.g., diversification, liquidity, or preplanned programs) and do not by themselves indicate company performance or insider confidence. No 10% owner status or derivative transactions are indicated in the filing.