Jane Street Group Discloses Significant Stake in Applied Optoelectronics

TL;DR

**Jane Street Group just disclosed a big stake in Applied Optoelectronics, watch for potential stock movement!**

AI Summary

Jane Street Group, LLC filed a Schedule 13G on March 23, 2026, indicating its beneficial ownership in Applied Optoelectronics, Inc. (CIK: 0001158114). This filing, required when an investor acquires more than 5% of a company's stock, signals Jane Street's significant stake in Applied Optoelectronics. For current or potential shareholders, this matters because a major institutional investor like Jane Street taking a position can be seen as a vote of confidence, potentially influencing market perception and the stock's future performance.

Why It Matters

This filing reveals a major institutional investor, Jane Street Group, has taken a significant position in Applied Optoelectronics, which could signal confidence in the company's future.

Risk Assessment

Risk Level: low — A Schedule 13G filing generally indicates a passive investment, posing low immediate risk to the company or its shareholders.

Analyst Insight

An investor might research Jane Street Group's investment thesis or track record to understand their interest in Applied Optoelectronics, and consider if this institutional backing aligns with their own investment strategy.

Key Players & Entities

• JANE STREET GROUP, LLC (company) — the entity filing the Schedule 13G
• APPLIED OPTOELECTRONICS, INC. (company) — the subject company in which beneficial ownership is reported
• 0001595888 (person) — CIK for JANE STREET GROUP, LLC
• 0001158114 (person) — CIK for APPLIED OPTOELECTRONICS, INC.
• 2026-03-23 (dollar_amount) — the filing date of the Schedule 13G

FAQ

Key Financial Figures

• $0.001 — ame of Issuer) Common Stock, Par value $0.001 (Title of Class of Securities) 03823U1

Filing Documents

• primary_doc.html (SCHEDULE 13G)
• primary_doc.xml (SCHEDULE 13G) — 8KB
• POA.pdf (EX-1) — 651KB
• 0001595888-26-000026.txt ( ) — 906KB

Ownership

Item 4. Ownership (a) Amount beneficially owned: 4,097,237.00 (b) Percent of class: 5.3  % (c) Number of shares as to which the person has:   (i) Sole power to vote or to direct the vote: 0   (ii) Shared power to vote or to direct the vote: 4,097,237.00   (iii) Sole power to dispose or to direct the disposition of: 0   (iv) Shared power to dispose or to direct the disposition of: 4,097,237.00

Ownership of 5 Percent or Less of a Class

Item 5. Ownership of 5 Percent or Less of a Class.   Not Applicable

Ownership of more than 5 Percent on Behalf of Another Person

Item 6. Ownership of more than 5 Percent on Behalf of Another Person.   Not Applicable Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.   If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Subsidiary Jane Street Capital, LLC Jane Street Options, LLC Jane Street Global Trading, LLC

Identification and Classification of Members of the Group

Item 8. Identification and Classification of Members of the Group.   Not Applicable

Notice of Dissolution of Group

Item 9. Notice of Dissolution of Group.   Not Applicable

Certifications

Item 10. Certifications:   By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under 240.14a-11.     SIGNATURE     After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.   JANE STREET GROUP, LLC   Signature: /s/ Jeremy Kahn Name/Title: Jeremy Kahn (Authorized Signatory) Date: 03/23/2026   Jane Street Capital, LLC   Signature: /s/ Jeremy Kahn Name/Title: Jeremy Kahn (Authorized Signatory) Date: 03/23/2026   Jane Street Options, LLC   Signature: /s/ Jeremy Kahn Name/Title: Jeremy Kahn (Authorized Signatory) Date: 03/23/2026   Jane Street Global Trading, LLC   Signature: /s/ Jeremy Kahn Name/Title: Jeremy Kahn (Authorized Signatory) Date: 03/23/2026

View Full Filing

View this filing on SEC EDGAR