← United States · Coverage record
US · SEC FORM 4
APPLIED OPTOELECTRONICS, INC.
AAOI · Nasdaq · CIK 0001158114 · Technology · Communication Equipment
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
93 Form 4 transaction lines observed in the same window
28 sales · 65 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 5 additional owner(s) remain in Form 4 evidence.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-08-14 · Lin Chih-Hsiang (Thompson).
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.
Price performance
- 1M
- +12.1%
- 3M
- -6.3%
- 6M
- +11.2%
- 12M
- —
Volatility & liquidity
- Volatility
- 145.8%
- Beta
- 3.78
- Avg daily value
- USD 1.1B
Valuation
- Market cap
- USD 9.8B
- P/E
- —
Fundamentals
- Profit margin
- -8.4%
- ROE
- -5.2%
- Industry
- Communication Equipment
Market data
Price data up to: 2026-10-04 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · From Yahoo Finance: Market cap · Status: PASS
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 13,870,138
- Previous report
- 12,307,146
- Avg daily volume
- 7,077,084
- Days to cover
- 2.0
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2025-08-14 | Lin Chih-Hsiang (Thompson) | Purchase (P) | Common Stock, $.001 par value | 8,075 | USD 21.56 | USD 174,057 | SEC filing ↗ |
| 2025-08-14 | Lin Che-Wei | Purchase (P) | Common Stock, $.001 par value | 4,609 | USD 21.64 | USD 99,739 | SEC filing ↗ |
| 2025-08-14 | Yeh William H | Purchase (P) | Common Stock, $.001 par value | 4,000 | USD 21.40 | USD 85,600 | SEC filing ↗ |
| 2025-08-13 | Yeh William H | Purchase (P) | Common Stock, $.001 par value | 14,000 | USD 22.86 | USD 320,100 | SEC filing ↗ |
| 2025-08-13 | Lin Chih-Hsiang (Thompson) | Purchase (P) | Common Stock, $.001 par value | 12,100 | USD 22.56 | USD 273,003 | SEC filing ↗ |
| 2025-08-13 | Chen Min-Chu (Mike) | Purchase (P) | Common Stock, $.001 par value | 7,500 | USD 22.91 | USD 171,825 | SEC filing ↗ |
| 2025-08-12 | Lin Chih-Hsiang (Thompson) | Purchase (P) | Common Stock, $.001 par value | 6,500 | USD 23.14 | USD 150,410 | SEC filing ↗ |
| 2025-05-13 | Lin Chih-Hsiang (Thompson) | Purchase (P) | Common Stock, $.001 par value | 21,200 | USD 18.22 | USD 386,248 | SEC filing ↗ |
| 2024-05-14 | Yeh William H | Purchase (P) | Common Stock, $.001 par value | 9,800 | USD 10.54 | USD 103,292 | SEC filing ↗ |
| 2024-03-18 | Yeh William H | Purchase (P) | Common Stock, $.001 par value | 8,000 | USD 12.75 | USD 102,000 | SEC filing ↗ |
| 2024-03-18 | Lin Chih-Hsiang (Thompson) | Purchase (P) | Common Stock, $.001 par value | 11,780 | USD 12.66 | USD 149,135 | SEC filing ↗ |
| 2024-03-18 | Lin Che-Wei | Purchase (P) | Common Stock, $.001 par value | 31,370 | USD 12.70 | USD 398,399 | SEC filing ↗ |
| 2024-02-27 | Yeh William H | Purchase (P) | Common Stock, $.001 par value | 10,000 | USD 15.29 | USD 152,900 | SEC filing ↗ |
| 2023-09-14 | Lin Chih-Hsiang (Thompson) | Purchase (P) | Common Stock, $.001 par value | 15,000 | USD 9.79 | USD 146,850 | SEC filing ↗ |
| 2023-09-06 | Lin Chih-Hsiang (Thompson) | Purchase (P) | Common Stock, $.001 par value | 5,964 | USD 12.44 | USD 74,192 | SEC filing ↗ |
Form 4 evidence
165 transaction lines in the latest 365-day window; 960 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-10-12 | Murry Stefan J. | Sale (S) | Common Stock, $.001 par value | 4,000 | USD 102.87 | USD 411,480 | SEC filing ↗ |
| 2026-10-05 | Yeh Shu-Hua (Joshua) | Sale (S) | Common Stock, $.001 par value | 6,000 | USD 120.03 | USD 720,180 | SEC filing ↗ |
| 2026-09-15 | BLACK RICHARD B | Gift (G) | Common Stock, $.001 par value | 2,200 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-10-12 | Murry Stefan J. | Sale (S) | Common Stock, $.001 par value | 4,000 | USD 102.87 | USD 411,480 | SEC filing ↗ |
| 2026-10-05 | Yeh Shu-Hua (Joshua) | Sale (S) | Common Stock, $.001 par value | 6,000 | USD 120.03 | USD 720,180 | SEC filing ↗ |
| 2026-09-15 | BLACK RICHARD B | Gift (G) | Common Stock, $.001 par value | 2,200 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-10 | Murry Stefan J. | Sale (S) | Common Stock, $.001 par value | 4,000 | USD 105.33 | USD 421,320 | SEC filing ↗ |
| 2026-09-08 | Chang Hung-Lun (Fred) | Sale (S) | Common Stock, $.001 par value | 32,172 | USD 110.21 | USD 3,545,676 | SEC filing ↗ |
| 2026-08-18 | Yeh Shu-Hua (Joshua) | Sale (S) | Common Stock, $.001 par value | 6,000 | USD 147.73 | USD 886,380 | SEC filing ↗ |
| 2026-08-10 | Murry Stefan J. | Sale (S) | Common Stock, $.001 par value | 4,000 | USD 144.79 | USD 579,160 | SEC filing ↗ |
| 2026-08-04 | Yeh Shu-Hua (Joshua) | Sale (S) | Common Stock, $.001 par value | 4,715 | USD 126.50 | USD 596,448 | SEC filing ↗ |
| 2026-07-31 | Lin Chih-Hsiang (Thompson) | Award / grant (A) | Common Stock, $.001 par value | 9,251 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-07-22 | Yeh Shu-Hua (Joshua) | Tax withholding (F) | Common Stock, $.001 par value | 4,709 | USD 119.26 | USD 561,595 | SEC filing ↗ |
| 2026-07-22 | Murry Stefan J. | Tax withholding (F) | Common Stock, $.001 par value | 5,408 | USD 119.26 | USD 644,958 | SEC filing ↗ |
| 2026-07-22 | Lin Chih-Hsiang (Thompson) | Tax withholding (F) | Common Stock, $.001 par value | 15,640 | USD 119.26 | USD 1,865,226 | SEC filing ↗ |
| 2026-07-22 | Kuo David C | Tax withholding (F) | Common Stock, $.001 par value | 3,264 | USD 119.26 | USD 389,265 | SEC filing ↗ |
| 2026-07-22 | Chang Hung-Lun (Fred) | Tax withholding (F) | Common Stock, $.001 par value | 4,676 | USD 119.26 | USD 557,660 | SEC filing ↗ |
| 2026-07-21 | Yeh Shu-Hua (Joshua) | Sale (S) | Common Stock, $.001 par value | 1,285 | USD 120.02 | USD 154,226 | SEC filing ↗ |
| 2026-07-10 | Murry Stefan J. | Sale (S) | Common Stock, $.001 par value | 4,000 | USD 122.09 | USD 488,360 | SEC filing ↗ |
| 2026-06-18 | Yeh Shu-Hua (Joshua) | Sale (S) | Common Stock, $.001 par value | 6,000 | USD 171.89 | USD 1,031,340 | SEC filing ↗ |
| 2026-06-17 | Chang Hung-Lun (Fred) | Sale (S) | Common Stock, $.001 par value | 40,329 | USD 170.60 | USD 6,880,127 | SEC filing ↗ |
| 2026-06-12 | Yeh Shu-Hua (Joshua) | Sale (S) | Common Stock, $.001 par value | 28,826 | USD 166.53 | USD 4,800,394 | SEC filing ↗ |
| 2026-06-12 | Yeh Shu-Hua (Joshua) | Tax withholding (F) | Common Stock, $.001 par value | 23,397 | USD 172.78 | USD 4,042,534 | SEC filing ↗ |
| 2026-06-12 | Murry Stefan J. | Sale (S) | Common Stock, $.001 par value | 33,000 | USD 166.53 | USD 5,495,490 | SEC filing ↗ |
| 2026-06-12 | Murry Stefan J. | Tax withholding (F) | Common Stock, $.001 par value | 30,330 | USD 172.78 | USD 5,240,417 | SEC filing ↗ |
| 2026-06-12 | Lin Chih-Hsiang (Thompson) | Sale (S) | Common Stock, $.001 par value | 59,000 | USD 166.53 | USD 9,825,270 | SEC filing ↗ |
| 2026-06-12 | Lin Chih-Hsiang (Thompson) | Tax withholding (F) | Common Stock, $.001 par value | 86,655 | USD 172.78 | USD 14,972,251 | SEC filing ↗ |
| 2026-06-12 | Kuo David C | Sale (S) | Common Stock, $.001 par value | 29,227 | USD 166.53 | USD 4,867,172 | SEC filing ↗ |
| 2026-06-12 | Kuo David C | Tax withholding (F) | Common Stock, $.001 par value | 19,065 | USD 172.78 | USD 3,294,051 | SEC filing ↗ |
| 2026-06-12 | Chang Hung-Lun (Fred) | Sale (S) | Common Stock, $.001 par value | 34,000 | USD 166.53 | USD 5,662,020 | SEC filing ↗ |
| 2026-06-12 | Chang Hung-Lun (Fred) | Tax withholding (F) | Common Stock, $.001 par value | 27,297 | USD 172.78 | USD 4,716,376 | SEC filing ↗ |
| 2026-06-10 | Murry Stefan J. | Sale (S) | Common Stock, $.001 par value | 4,000 | USD 171.45 | USD 685,800 | SEC filing ↗ |
| 2026-06-09 | Yeh William H | Award / grant (A) | Common Stock, $.001 par value | 1,166 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | AAOI |
| CIK | 0001158114 |
| Sector | Technology |
| Industry | Communication Equipment Yahoo Finance |
| SEC SIC | 3674 Semiconductors & Related Devices |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 960 transaction lines from 2020-01-22 to 2026-10-12 26 P purchase lines · 146 S sale lines · 788 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.