Hung-Lun (fred) Chang - 13 Aug 2025 Form 4 Insider Report for APPLIED OPTOELECTRONICS, INC. (AAOI)

Role: *** Senior Vice President and North America General Manager
Signature: /s/ David C. Kuo, attorney in fact for Hung-Lun (Fred) Chang
Issuer symbol: AAOI
Transactions as of: 13 Aug 2025
Net transactions value: -$358,311
Form type: 4
Filing time: 14 Aug 2025, 19:08:20 UTC
Previous filing: 24 Jul 2025
Next filing: 24 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Chang Hung-Lun (Fred)	*** Senior Vice President and North America General Manager	C/O APPLIED OPTOELECTRONICS, INC., 13139 JESS PIRTLE BLVD., SUGAR LAND	/s/ David C. Kuo, attorney in fact for Hung-Lun (Fred) Chang	14 Aug 2025	0001587462

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AAOI	Common Stock, $.001 par value	Sale	$358,311	-15,784	-5.8%	$22.70	256,326	13 Aug 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The shares were sold in multiple transactions on August 13, 2025 at actual sale prices ranging from $22.58 to $22.81 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.

Content

The shares were sold in multiple transactions on August 13, 2025 at actual sale prices ranging from $22.58 to $22.81 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.

Remarks:

*** Senior Vice President and North America General Manager