Applied Optoelectronics Inc (AAOI) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 14, 2026.
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- Filings shown
- 15
- Open-market buys
- 0
- Open-market sells
- 9
Counts cover the 15 most recent Form 4 filings Tradune holds for AAOI (filed Jul 14 – Oct 14, 2026); the score below covers only the trailing 90 days (0 buys, 7 sells). No completed check of AAOI's Form 4 list on SEC EDGAR is on record yet; the latest AAOI filing Tradune holds was filed Oct 14, 2026. This is not guaranteed to be the complete record — see AAOI's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 14 filings Tradune holds for AAOI filed Jul 23 – Oct 14, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
8 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 3 sales· 14,000 sh
- checkbox disclosed
- On filings with the box not checked
- 1 sale· 32,172 sh
- not proof that no plan exists
- Not comparable
- 4 sales· 16,000 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Shu-Hua (Joshua) Yeh*** See Remarks | 0 | 4 | — | 18,000 | −$2,357,233 |
| Stefan J. MurryChief Financial Officer | 0 | 3 | — | 12,000 | −$1,411,960 |
| Hung-Lun (Fred) Chang*** See Remarks | 0 | 1 | — | 32,172 | −$3,545,676 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at AAOI
No open-market insider purchases (Form 4 code P) were reported for AAOI between Jul 14, 2026 and Oct 14, 2026. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 4,000 | $102.87 | 363,168 | −1.1% | Oct 12, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 6,000 | $120.03 | 371,498 | −1.6% | Oct 5, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 2,200 | — | 159,092 (indirect) | −1.4% | Sep 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 4,000 | $105.33 | 367,168 | −1.1% | Sep 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 32,172 | $110.21 | 249,276 | −11% | Sep 8, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 6,000 | $147.73 | — | — | Aug 18, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 4,000 | $144.79 | — | — | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 4,715 | $126.50 | — | — | Aug 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 9,251 | — | — | — | Jul 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 1,869 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 472 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 516 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 407 | $119.26 | — | — | Jul 22, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 2,971 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 679 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 988 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 770 | $119.26 | — | — | Jul 22, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 2,674 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 613 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 773 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 616 | $119.26 | — | — | Jul 22, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 2,332 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 2,524 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 2,031 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 8,753 | $119.26 | — | — | Jul 22, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 2,553 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 609 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 861 | $119.26 | — | — | Jul 22, 2026 |
| Tax withholding | 686 | $119.26 | — | — | Jul 22, 2026 |
| Open-market sale | 1,285 | $120.02 | — | — | Jul 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 4,000 | $122.09 | — | — | Jul 10, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to AAOI's (Oct 14, 2026).
Frequently asked about AAOI insider activity
How many insiders bought AAOI stock in these Form 4 filings?
No open-market purchases (Form 4 code P) of AAOI shares were reported by Applied Optoelectronics Inc insiders between Jul 14, 2026 and Oct 14, 2026. The 15 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for AAOI?
The most recent Form 4 on this page was filed by Stefan J. Murry (Chief Financial Officer) on Oct 14, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market AAOI insider sale shown?
The largest open-market sale among the filings shown was 32,172 AAOI shares at $110.21 (about $3,545,676) by Hung-Lun (Fred) Chang (*** See Remarks) on Sep 8, 2026. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track AAOI insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.