SEC Form 4 reporting owner

Chang Hung-Lun (Fred)

Chang Hung-Lun (Fred) has filed 22 Form 4 transactions reported between January 22, 2026 and September 8, 2026, as *** See Remarks of APPLIED OPTOELECTRONICS, INC..

Name as filed: Chang Hung-Lun (Fred)

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$26.4M

6 lines

Companies

with Form 4 filings

Latest transaction

Sep 8, 2026

transaction date

Roles and reported holdings

AAOIAPPLIED OPTOELECTRONICS, INC.
Jan 22, 2026 – Sep 8, 2026
*** See Remarks
Held directly249,276 sh as of Sep 8, 2026 · Form 4
24 months: $26.4M sold

Transaction history

All 22 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 8, 2026	AAOI*** See Remarks	Open-market saleCode S · direct	32,172	$110.21	$3.5M@ $110.21	249,276	Form 4
Jul 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	616	$119.26	$73K@ $119.26	281,448	Form 4
Jul 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	773	$119.26	$92K@ $119.26	280,064	Form 4
Jul 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	613	$119.26	$73K@ $119.26	282,837	Form 4
Jul 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	2,674	$119.26	$319K@ $119.26	283,450	Form 4
Jun 17, 2026	AAOI*** See Remarks	Open-market saleCode S · direct	40,329	$170.60	$6.9M@ $170.60	286,124	Form 4
Jun 12, 2026	AAOI*** See Remarks	Open-market saleCode S · direct	34,000	$166.53	$5.7M@ $166.53	326,453	Form 4
Jun 12, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	27,297	$172.78	$4.7M@ $172.78	360,453	Form 4
Jun 5, 2026	AAOI*** See Remarks	Open-market saleCode S · direct	4,000	$200.07	$800K@ $200.07	387,750	Form 4
May 19, 2026	AAOI*** See Remarks	Open-market saleCode S · direct	33,630	$173.26	$5.8M@ $173.26	391,750	Form 4
May 19, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	27,297	$190.36	$5.2M@ $190.36	425,380	Form 4
May 15, 2026	AAOI*** See Remarks	Grant or awardCode A · direct	224,199	—	—	452,677	Form 4
Apr 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	677	$150.57	$102K@ $150.57	228,478	Form 4
Apr 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	850	$150.57	$128K@ $150.57	229,155	Form 4
Apr 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	673	$150.57	$101K@ $150.57	230,005	Form 4
Apr 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	2,940	$150.57	$443K@ $150.57	230,678	Form 4
Mar 16, 2026	AAOI*** See Remarks	Open-market saleCode S · direct	36,400	$100.25	$3.6M@ $100.25	233,618	Form 4
Feb 9, 2026	AAOI*** See Remarks	Grant or awardCode A · direct	25,799	—	—	270,018	Form 4
Jan 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	850	$38.38	$33K@ $38.38	244,219	Form 4
Jan 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	674	$38.38	$26K@ $38.38	245,069	Form 4
Jan 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	2,940	$38.38	$113K@ $38.38	245,743	Form 4
Jan 22, 2026	AAOI*** See Remarks	Shares withheld for tax or exercise priceCode F · direct	1,874	$38.38	$72K@ $38.38	248,683	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.