[Form 4] Applied Optoelectronics, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Applied Optoelectronics, Inc. (AAOI) Form 4: Senior Vice President and North America General Manager Hung-Lun (Fred) Chang reported sales of 15,784 shares of the company's common stock on 08/13/2025. The transactions executed at actual sale prices ranging from $22.58 to $22.81 per share, with a weighted average price reported as $22.7009. After these disposals, the reporting person beneficially owned 256,326 shares, held directly. The filing was signed by an attorney-in-fact on 08/14/2025. The filer offers to provide detailed per-transaction share counts and prices upon request by SEC staff, the issuer, or a security holder.

Positive

• Disclosure compliance: Form 4 was filed and reports transaction details, supporting transparency.
• Offer to provide transaction breakdown: Reporting person offers to supply per-trade numbers and prices upon request.

Negative

• Insider sale of 15,784 shares: Senior officer disposed of shares on 08/13/2025, reducing direct holdings to 256,326 shares.

Insights

Securities Analyst

TL;DR: Insider sold a modest block of shares; disclosure is routine and provides required transparency.

The Form 4 shows a single-day disposal of 15,784 shares by a senior officer at weighted-average proceeds of $22.7009 per share. The sale reduced direct holdings to 256,326 shares. There is no indication in this Form 4 of derivative transactions, option exercises, or acquisition purchases tied to these disposals. The filing includes an explicit offer to provide per-transaction details, which supports transparency for compliance and market monitoring. On its face, the transaction appears as an ordinary insider sale rather than a structural change in ownership.

Corporate Governance Expert

TL;DR: The report fulfills Section 16 disclosure obligations; the size is non-control altering but should be monitored for pattern.

The filing, executed by an attorney-in-fact, discloses multiple trades aggregated into a single line with a weighted-average price. The reporting person is identified as an officer and director, and the remarks note the officer's title. The Form 4 properly reports the resulting beneficial ownership of 256,326 shares. While this single filing is routine, governance reviewers typically track frequency and timing of insider sales for potential signaling; this form alone does not provide any governance red flags beyond a standard insider disposition.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Chang Hung-Lun (Fred)

(Last) (First) (Middle)

C/O APPLIED OPTOELECTRONICS, INC.

13139 JESS PIRTLE BLVD.

(Street)

SUGAR LAND TX 77478

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
APPLIED OPTOELECTRONICS, INC. [ AAOI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	*** See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
08/13/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $.001 par value	08/13/2025		S		15,784(1)	D	$22.7009	256,326	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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

	/s/ David C. Kuo, attorney in fact for Hung-Lun (Fred) Chang	08/14/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did AAOI insider Hung-Lun (Fred) Chang report on the Form 4?

He reported selling 15,784 shares of Applied Optoelectronics common stock on 08/13/2025 at actual prices between $22.58 and $22.81, weighted average $22.7009.

How many AAOI shares does the reporting person own after the sale?

256,326 shares beneficially owned following the reported transactions.

Were these sales executed in a single trade or multiple trades?

Multiple transactions occurred on 08/13/2025; the Form 4 reports an aggregated weighted average price and offers to provide a per-transaction breakdown upon request.

Does the Form 4 show any derivative or option transactions for AAOI?

No. Table II for derivative securities contains no entries in this filing.

Who signed the Form 4 filing for the reporting person?

David C. Kuo, attorney-in-fact, signed the Form 4 on behalf of Hung-Lun (Fred) Chang on 08/14/2025.