Changes in Beneficial Ownership · 4

Applied Optoelectronics, Inc.

AAOINASDAQEQUITYCurrent

Changes in Beneficial Ownership

Filed Sep 10, 2026Accepted Sep 10, 2026, 4:27 PM EDTFiling CIK 1158114Accession 0001683168-26-007058

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Structured filing — 4

ownership.xml

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Filing details

Report period: 2026-09-10
Issuer: APPLIED OPTOELECTRONICS, INC.
Issuer CIK: 0001158114
Trading symbol: AAOI
Rule 10b5-1 indication: Checked

Reporting owner 1

Name: Murry Stefan J.
Reporting owner CIK: 0001587599
Relationship: Officer
Officer title: Chief Financial Officer
Address: C/O APPLIED OPTOELECTRONICS, INC., 13139 JESS PIRTLE BLVD., SUGAR LAND, TX, 77478

Non-derivative transactions

Non-derivative transactions · 1 reported row
Security	Transaction date	Code	Amount	A / D	Price (USD)	Owned after	Ownership
Common Stock, $.001 par value	2026-09-10	S · Form 4	4,000^[F1]	D	105.33	367,168	D

Table key

S · Form 4: Sale on the market or privately
D: Direct

Footnotes

F1: These sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 12, 2025. The shares were sold in multiple transactions at actual sale prices ranging from $104.60 to $105.98 per share. The price reported reflects the weighted average sale price for the transactions. The reporting person undertakes to provide upon request by SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold during each transaction.↩ 1

Signature 1

Signed: /s/ David C. Kuo, attorney in fact for Stefan J. Murry
Date: 2026-09-10

Company context

Applied Optoelectronics, Inc. (AOI) is a leading developer and manufacturer of advanced optical and Hybrid Fiber-Coax (HFC) networking products that are the building blocks for AI datacenters, CATV and broadband fiber access networks around the world. AOI supplies this critical infrastructure to tier-one customers across cloud computing, CATV broadband, telecom, and FTTH markets. The company has R&D facilities in Atlanta, GA, and engineering and manufacturing facilities at its corporate headquarters in Sugar Land, TX, as well as in Taipei, Taiwan and Ningbo, China. For additional information, visit www.ao-inc.com. # # #

Current securities

AAOINASDAQ · EQUITY · Current

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