Jane Street Group Discloses 5.3% Stake in Applied Optoelectronics

Jane Street Group, LLC and its affiliates have filed a Schedule 13G disclosing a 5.3% ownership stake in Applied Optoelectronics, Inc. (AAOI). The filing reports ownership of 4,097,237 shares of common stock as of March 17, 2026, representing a significant increase from their previous position of 1,682,894 shares. The Jane Street entities collectively hold voting and dispositive power over all shares, with Jane Street Group, LLC acting as the parent holding company. The filing is made under Rule 13d-1(c) and includes certifications that the securities were not acquired for the purpose of changing or influencing control of the issuer. The disclosure represents a substantial increase in ownership from approximately 0% to 5.3% of the company's outstanding shares.