Applied Optoelectronics (AAOI) officer sells 4,000 common shares

Rhea-AI Filing Summary

APPLIED OPTOELECTRONICS, INC. officer Chang Hung-Lun (Fred) reported an open-market sale of 4,000 shares of common stock on June 5, 2026 at a weighted average price of $200.07 per share.

The shares were sold in multiple transactions at prices ranging from $200.00 to $200.37 per share, and the officer now directly holds 387,750 shares after the sale.

Insider Trade Summary

Net Seller: 4,000 shares ($800,280)

Net Sell 1 txn

Insider Chang Hung-Lun (Fred)

Role *** See Remarks

Sold 4,000 shs ($800K)

Type	Security	Shares	Price	Value
Sale	Common Stock, $.001 par value	4,000	$200.07	$800K

Holdings After Transaction: Common Stock, $.001 par value — 387,750 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 4,000 shares Weighted average sale price: $200.07 per share Sale price range: $200.00–$200.37 per share +1 more

4 metrics

Shares sold 4,000 shares Open-market sale on June 5, 2026

Weighted average sale price $200.07 per share Common Stock, $.001 par value

Sale price range $200.00–$200.37 per share Individual trades on June 5, 2026

Shares owned after transaction 387,750 shares Direct ownership following sale

Key Terms

open-market sale, weighted average sale price, Common Stock, $.001 par value, Form 4

4 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average sale price financial

"The price reported reflects the weighted average sale price"

Common Stock, $.001 par value financial

"security_title: "Common Stock, $.001 par value""

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

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
Estimated average burden
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 TEXAS 77478

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/05/2026

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

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

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

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	06/05/2026		S		4,000(1)	D	$200.07	387,750	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 June 5, 2026 at actual sale prices ranging from $200.00 to $200.37 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	06/08/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did AAOI officer Chang Hung-Lun report?

Chang Hung-Lun reported an open-market sale of 4,000 shares of Applied Optoelectronics common stock. The transaction occurred on June 5, 2026 at a weighted average sale price of $200.07 per share across multiple trades.

At what prices were the AAOI shares sold in this Form 4 filing?

The 4,000 Applied Optoelectronics shares were sold in multiple transactions at prices ranging from $200.00 to $200.37 per share. The reported $200.07 reflects the weighted average sale price for those individual trades.

How many AAOI shares does Chang Hung-Lun own after the reported sale?

After selling 4,000 shares, Chang Hung-Lun directly holds 387,750 shares of Applied Optoelectronics common stock. This post-transaction balance is disclosed in the Form 4 as the total shares owned following the sale.

Was the AAOI insider transaction a purchase or a sale?

The Form 4 reports a sale transaction. It is classified with code "S" as an open-market sale of 4,000 shares of Applied Optoelectronics common stock at a weighted average price of $200.07 per share.

How were the AAOI insider sale details reported for individual trades?

The filing states the 4,000 shares were sold in multiple transactions on June 5, 2026. Actual sale prices ranged from $200.00 to $200.37 per share, and the insider undertakes to provide full trade details on request.