ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) Insider Trading & SEC Filings
Last SEC filing
ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) has filed 10 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-21. Insider sales over the same period: 5 transactions worth $623K. 3 Form 8-K material event filings were reported by AOSL in the last 90 days. 4 Form 144 notices of proposed sale were filed for AOSL stock. InsiderAlpha tracks every AOSL SEC filing - Form 4, Form 144, and 8-K - in real time, including Rule 10b5-1 plan detection.
About ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL)
ALPHA & OMEGA SEMICONDUCTOR Ltd trades under the ticker AOSL. InsiderAlpha tracks 55 primary SEC Form 4 filings from 13 reporting insiders for AOSL since 2024, sourced directly from SEC EDGAR.
| Sector | Information Technology insider trading |
|---|---|
| SIC classification | Semiconductors & Related Devices (SIC 3674) |
| SEC CIK | 0001387467 |
90-Day SEC Filing Activity
| Insider sales (90d) | 5 ($623K) |
|---|---|
| Form 4 filings (90d) | 10 |
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 4 |
| Latest Form 4 filing | 2026-07-21 |
Recent AOSL Insider Transactions (Form 4)
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Joshua C. Chien | Director | A - Grant or award | 1.4K | $0.00 | - | SEC | |
| Bing Xue | EVP-WW Sales & Bus Development | S - Open-market sale [10b5-1] | 875 | $33.99 | $30K | SEC | |
| Mike F. Chang | Director | G - Bona-fide gift | 23.8K | $0.00 | - | SEC | |
| Bing Xue | EVP-WW Sales & Bus Development | S - Open-market sale [10b5-1] | 4.9K | $47.09 | $231K | SEC | |
| Mike F. Chang | Director | G - Bona-fide gift | 30.0K | $0.00 | - | SEC | |
| Mike F. Chang | Director | G - Bona-fide gift | 39.8K | $0.00 | - | SEC | |
| Mike F. Chang | Director | G - Bona-fide gift | 736.3K | $0.00 | - | SEC | |
| Claudia Chen | Director | S - Open-market sale [10b5-1] | 217 | $40.54 | $9K | SEC | |
| Claudia Chen | Director | S - Open-market sale [10b5-1] | 3.8K | $39.47 | $152K | SEC | |
| Stephen Chunping Chang | Chief Executive Officer | G - Bona-fide gift | 2.0K | $0.00 | - | SEC | |
| Bing Xue | EVP-WW Sales & Bus Development | S - Open-market sale [10b5-1] | 4.9K | $41.00 | $202K | SEC | |
| Stephen Chunping Chang | Chief Executive Officer | S - Open-market sale [10b5-1] | 9.9K | $34.90 | $346K | SEC | |
| Yifan Liang | CFO and Corp Secretary | S - Open-market sale [10b5-1] | 8.6K | $35.00 | $302K | SEC | |
| Stephen Chunping Chang | Chief Executive Officer | S - Open-market sale [10b5-1] | 1.5K | $32.90 | $49K | SEC | |
| Stephen Chunping Chang | Chief Executive Officer | S - Open-market sale [10b5-1] | 3.5K | $33.90 | $118K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL). Updated in real time as new filings are submitted to the SEC.
Most-Active AOSL Insiders - Last 90 Days
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Mike F. Chang | 4 | - |
| Bing Xue | 3 | $463K |
| Claudia Chen | 2 | $161K |
| Stephen Chunping Chang | 1 | - |
| Joshua C. Chien | 1 | - |
Recent AOSL Form 8-K Material Events
- - Item 5.02, 9.01 [SEC]
- - Item 2.01, 9.01 [SEC]
- - Item 2.02, 9.01 [SEC]
- - Item 5.02 · Leadership · neutral [SEC]
Dr. Lucas S. Chang retired from the Board of Directors of Alpha and Omega Semiconductor Limited, effective April 17, 2026. This is a routine board departure with no indication of controversy or material impact to operations. - - Item 5.02 · Other · neutral [SEC]
Alpha and Omega Semiconductor's Compensation Committee approved a 2026 incentive cash bonus plan for executive officers tied to adjusted earnings per share and revenue targets. The plan establishes minimum, target, and maximum bonus percentages for the CEO and other named executi
Recent AOSL Form 144 Notices of Proposed Sale
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
Recent Insider Filings
- - Joshua C. Chien (Director)
- - Bing Xue (EVP-WW Sales & Bus Development)
- - Mike F. Chang (Director)
- - Bing Xue (EVP-WW Sales & Bus Development)
- - Mike F. Chang (Director)
Form 4 Transaction Code Reference
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in AOSL insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
AOSL Insider Trading - FAQ
- What is the latest insider trade for AOSL?
- ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) had 10 insider filings in the last 90 days, with the most recent on 2026-07-21. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
- How many insiders are buying AOSL stock?
- 0 insider purchases of AOSL were filed in the last 90 days.
- How many insiders are selling AOSL stock?
- 5 insider sales of AOSL were filed in the last 90 days, totaling $623K.
- Where can I see AOSL SEC filings (Form 4, 10-K, 10-Q, 8-K)?
- This page tracks AOSL Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Learn More
- What is SEC Form 4?
- How to read insider buying signals
- Rule 10b5-1 trading plans explained
- The cluster buying signal
Open the live AOSL dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.