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AAOIApplied Optoelectronics, Inc. · Insider ownership research

Applied Optoelectronics, Inc. insiders sold $125M in the past 12 months. How much of their stake is that?

Insiders sold $125M in the past 12 months.18% was sold under disclosed trading plans, 82% with no plan disclosed. The largest seller, Hung-Lun Chang (*** Senior Vice President and North America General Manager), sold $26.4M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why

Updated Oct 13, 2026 from SEC filings · covers Oct 14, 2025 to Oct 13, 2026
$103M
sold with no plan disclosed, past 12 months
18%
of sales were under disclosed trading plans, past 12 months
10 of 12
officers and directors sold shares, past 12 months
Is this normal? More than usual: $125M sold, after almost none in the past 5 years. 10 insiders sold; the average is 4 a year. Year by year
Latest filing: Filed Oct 7 for a sale on Oct 5. Shu-Hua Yeh sold 6K shares ($720K) under a disclosed plan. Filing
SEC ownership filings: 79 filed in the 12 months to Oct 13, 2026; 794 on record since Sep 25, 2013 · See the evidence

What stands out

Nine insiders sold $102M with no disclosed plan: Chih-Hsiang Lin ($19.9M), Hung-Lun Chang ($19.5M) and Shu-Hua Yeh ($13.6M), plus 6 more. The filings don't state a reason.Chih-Hsiang Lin: largest such sale, May 19, 2026 · Hung-Lun Chang: largest such sale, May 19, 2026 · Shu-Hua Yeh: largest such sale, May 19, 2026

A share of stake is shown for 0 of the 10 officers and directors who sold. 12 are left out

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Left out: Chih-Hsiang Lin, Shu-Hua Yeh, Richard Black, Stefan Murry, Hung-Lun Chang, William Yeh, Che-Wei Lin, Min-Chu Chen, David Kuo, Cynthia DeLaney, Elizabeth Loboa and Robert Flanagan (share of stake is being verified).
Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.

Hung-Lun Chang
*** Senior Vice President and North America General Manager
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$26.4M26% planned 74% no plan disclosed
Shu-Hua Yeh
Senior Vice President and Asia General Manager
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$21.9M38% planned 62% no plan disclosed
Chih-Hsiang Lin
President and CEO, Director
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$19.9MNo plan disclosed
Stefan Murry
Chief Financial Officer
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$16.5M32% planned 68% no plan disclosed
David Kuo
***Senior Vice President and Chief Legal Officer
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$13.1M16% planned 84% no plan disclosed
All 10 sellers

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planNo plan disclosedOne dollar scale for every month; the tallest bar is labeled
OctNovDec 2025: $628K under a disclosed planDec 2025: $125K no plan disclosedDecJan 2026: $677K under a disclosed planJanFeb 2026: $2.2M under a disclosed planFebMar 2026: $5.3M under a disclosed planMar 2026: $21.5M no plan disclosedMarApr 2026: $546K under a disclosed planAprMay 2026: $638K under a disclosed planMay 2026: $42.4M no plan disclosedMayJun 2026: $8.6M under a disclosed planJun 2026: $35.2M no plan disclosed$43.8MJunJul 2026: $643K under a disclosed planJulAug 2026: $2.1M under a disclosed planAugSep 2026: $421K under a disclosed planSep 2026: $3.5M no plan disclosedSepOct 2026: $720K under a disclosed planOct

Recent activity

Past 30 days, Sep 14, 2026 to Oct 13, 2026
Oct 5, 2026Shu-Hua Yeh sold 6K shares ($720K) under a disclosed trading plan.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Shu-Hua Yeh
Senior Vice President and Asia General Manager
6,000$120.03n/an/aOct 5, 2026Oct 7, 2026
Sep 15, 2026Richard Black gave away 2.2K shares as a gift.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Richard Black
Director
2,200n/an/an/aSep 15, 2026Sep 17, 2026

"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Common questions

Is the Applied Optoelectronics, Inc. CEO selling stock?

Yes. Chih-Hsiang Lin sold 117K shares ($19.9M) in the past 12 months, none of it under a trading plan disclosed in the filings.

Why are Applied Optoelectronics, Inc. insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 18% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 82% had no disclosed plan. A trading plan schedules sales in advance.

Are any Applied Optoelectronics, Inc. insiders buying?

No. Officers and directors reported no purchases in the past 12 months.

The evidence

Who sold10 officers and directors: amount, % of holdings, trading plan
Who soldAmount% of holdingsTrading plan
Hung-Lun Chang
*** Senior Vice President and North America General Manager
$26.4M
181K shares
Not confirmed
share of stake is being verified. Why
26% under a disclosed plan 74% no plan disclosed
Shu-Hua Yeh
Senior Vice President and Asia General Manager
$21.9M
152K shares
Not confirmed
share of stake is being verified. Why
38% under a disclosed plan 62% no plan disclosed
Chih-Hsiang Lin
President and CEO, Director
$19.9M
117K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Stefan Murry
Chief Financial Officer
$16.5M
126K shares
Not confirmed
share of stake is being verified. Why
32% under a disclosed plan 68% no plan disclosed
David Kuo
***Senior Vice President and Chief Legal Officer
$13.1M
122K shares
Not confirmed
share of stake is being verified. Why
16% under a disclosed plan 84% no plan disclosed
Cynthia DeLaney
Director
$12.8M
78K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Elizabeth Loboa
Director
$9.9M
106K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Min-Chu Chen
Director
$2.9M
20K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
William Yeh
Director
$1.6M
15K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Richard Black
Director
$307K
3.2K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
The full ownership picture0 of 12 officers and directors confirmed

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

InsiderHeld Oct 13, 2025SoldHeld Oct 13, 2026Still held
Chih-Hsiang Lin
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Chih-Hsiang Lin are complete.
President and CEO, Director
n/a−117Kn/an/a
Vesting, gifts, unvested awards and holding lines for Chih-Hsiang Lin

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Chih-Hsiang Lin are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−246Kwithheld by the company for taxes
Shu-Hua Yeh
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Shu-Hua Yeh are complete.
Senior Vice President and Asia General Manager
n/a−152Kn/an/a
Vesting, gifts, unvested awards and holding lines for Shu-Hua Yeh

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Shu-Hua Yeh are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−53Kwithheld by the company for taxes
Richard Black
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Richard Black are complete.
Director
n/a−3.2Kn/an/a
Vesting, gifts, unvested awards and holding lines for Richard Black

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Richard Black are complete; balances and unit counts will be added when the check is finished.

−2.8Kgifted (net of own trusts)
Stefan Murry
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Stefan Murry are complete.
Chief Financial Officer
n/a−126Kn/an/a
Vesting, gifts, unvested awards and holding lines for Stefan Murry

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Stefan Murry are complete; balances and unit counts will be added when the check is finished.

−1Kgifted (net of own trusts)
−86Kwithheld by the company for taxes
Hung-Lun Chang
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Hung-Lun Chang are complete.
*** Senior Vice President and North America General Manager
n/a−181Kn/an/a
Vesting, gifts, unvested awards and holding lines for Hung-Lun Chang

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Hung-Lun Chang are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−77Kwithheld by the company for taxes
William Yeh
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for William Yeh are complete.
Director
n/a−15Kn/an/a
Vesting, gifts, unvested awards and holding lines for William Yeh

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for William Yeh are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Che-Wei Lin
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Che-Wei Lin are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Che-Wei Lin

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Che-Wei Lin are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Min-Chu Chen
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Min-Chu Chen are complete.
Director
n/a−20Kn/an/a
Vesting, gifts, unvested awards and holding lines for Min-Chu Chen

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Min-Chu Chen are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
David Kuo
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for David Kuo are complete.
***Senior Vice President and Chief Legal Officer
n/a−122Kn/an/a
Vesting, gifts, unvested awards and holding lines for David Kuo

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for David Kuo are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−53Kwithheld by the company for taxes
Cynthia DeLaney
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Cynthia DeLaney are complete.
Director
n/a−78Kn/an/a
Vesting, gifts, unvested awards and holding lines for Cynthia DeLaney

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Cynthia DeLaney are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Elizabeth Loboa
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Elizabeth Loboa are complete.
Director
n/a−106Kn/an/a
Vesting, gifts, unvested awards and holding lines for Elizabeth Loboa

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Elizabeth Loboa are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Robert Flanagan
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Robert Flanagan are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Robert Flanagan

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Robert Flanagan are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Holdings and share of stake for Applied Optoelectronics, Inc. are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.

What explains the selling$125M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $125M across 919,321 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

The lighter segment is sales with no plan disclosed in the filing ($103M), including tax-related sales outside a plan.

No plan disclosed · $103M

Sales with no 10b5-1 plan and no tax reference in the filing. $19.9M of it is Chih-Hsiang Lin. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Cynthia DeLaney, May 26, 2026

Taxes

514,381 shares ($77.4M) were withheld by the company for taxes, which isn't a market sale.

SellerShares soldProceedsUnder a disclosed planShare of totalSales dates
Hung-Lun Chang
*** Senior Vice President and North America General Manager
181K$26.4M26%21%Mar 16, 2026 to Sep 8, 2026
Shu-Hua Yeh
Senior Vice President and Asia General Manager
152K$21.9M38%17%Mar 9, 2026 to Oct 5, 2026
Chih-Hsiang Lin
President and CEO, Director
117K$19.9M0%16%May 19, 2026 to Jun 12, 2026
Stefan Murry
Chief Financial Officer
126K$16.5M32%13%Dec 10, 2025 to Sep 10, 2026
David Kuo
***Senior Vice President and Chief Legal Officer
122K$13.1M16%11%Dec 23, 2025 to Jun 12, 2026
Cynthia DeLaney
Director
78K$12.8M0%10%Mar 4, 2026 to May 26, 2026
Elizabeth Loboa
Director
106K$9.9M0%8%Dec 15, 2025 to Mar 3, 2026
Min-Chu Chen
Director
20K$2.9M0%2%Mar 6, 2026 to Jun 2, 2026
William Yeh
Director
15K$1.6M0%1%Mar 9, 2026 to Mar 9, 2026
Richard Black
Director
3.2K$307K0%0.2%Mar 5, 2026 to Mar 5, 2026

Sales by month

MonthSale proceedsDisclosed planTo cover taxesNo plan disclosed
Oct 2025$0$0$0$0
Nov 2025$0$0$0$0
Dec 2025$753K$628K$0$125K
Jan 2026$677K$677K$0$0
Feb 2026$2.2M$2.2M$0$0
Mar 2026$26.8M$5.3M$0$21.5M
Apr 2026$546K$546K$0$0
May 2026$43.1M$638K$0$42.4M
Jun 2026$43.8M$8.6M$0$35.2M
Jul 2026$643K$643K$0$0
Aug 2026$2.1M$2.1M$0$0
Sep 2026$4.0M$421K$0$3.5M
Oct 2026$720K$720K$0$0
Is this normal? Selling year by year5 earlier years to compare with

More than usual: $125M sold, after almost none in the past 5 years. 10 insiders sold; the average is 4 a year.

12 months endingShares soldInsiders who soldProceeds
Oct 13, 2026
Latest 12 months
919K10$125M
Oct 13, 2025
1 year earlier
250K7$7.2M
Oct 13, 2024
2 years earlier
73K3$1.5M
Oct 14, 2023
3 years earlier
320K5$2.8M
Oct 14, 2022
4 years earlier
00$0
Oct 14, 2021
5 years earlier
53K4$591K

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertainty12 officers and directors not confirmed

Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Applied Optoelectronics, Inc. are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology794 filings on record, 79 filed in the 12-month period, and how we read them

All 794 Forms 3, 4 and 5 on record for Applied Optoelectronics, Inc. (SEC CIK 1158114), filed from Sep 25, 2013 to Oct 7, 2026; 79 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 13, 2026. Prices are the ones reported in each filing, often weighted averages.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (6)No filing in 18 months; last reported balances, not in any total
NameLast filedLast reported balance
Alex IgnatievJun 16, 202069,990 shares, last reported balance as of Jun 12, 2020
Alan MooreJun 4, 2019385,222 shares, last reported balance as of May 31, 2019
Klaus AnselmFeb 8, 201635,278 shares, last reported balance as of Feb 4, 2016
Chung-Yao LiJun 17, 2015No balance on record
James Dunn Jr.Sep 25, 2014No balance on record
Juen-Sheng KangNov 18, 2013135,894 shares, last reported balance as of Nov 14, 2013

Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.