Stephen Chunping Chang - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Stephen Chunping Chang has filed 1 SEC Form 4 filing across 1 company in the last 90 days - selling. Lifetime open-market sales: $691K.
Profile
Stephen Chunping Chang serves as Chief Executive Officer of ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL). Chang has reported 6 insider filings with the SEC since 2024. The most recent filing was in May 2026.
| Role | Chief Executive Officer, Director |
|---|---|
| Notability | 40/100 |
Board memberships
- ALPHA & OMEGA SEMICONDUCTOR Ltd
Reported roles
- Chief Executive Officer
Awards & honors
- Chief Executive Officer of AOSL
- Director at AOSL
Trading Pattern
InsiderAlpha's records for Stephen Chunping Chang go back to 2024: 6 primary Form 4 filings, an average of 2.0 per year. 4 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Career & Filing History
Every role Stephen Chunping Chang has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Chief Executive Officer, Director at ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) - 5 filings, 2025 to 2026
- Chief Executive Officer at ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) - 1 filing, 2024
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-26 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | G - Bona-fide gift | 2.0K | $0.00 | |
| 2026-04-20 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | S - Open-market sale [10b5-1] | 9.9K | $34.90 | $346K |
| 2026-04-20 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | S - Open-market sale [10b5-1] | 3.5K | $33.90 | $118K |
| 2026-04-20 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | S - Open-market sale [10b5-1] | 1.5K | $32.90 | $49K |
| 2026-04-16 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | S - Open-market sale [10b5-1] | 5.6K | $31.90 | $178K |
| 2026-03-18 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | A - Grant or award | 67.5K | $0.00 | |
| 2026-03-18 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | F - Tax withholding / forfeiture | 17.8K | $21.43 | $382K |
| 2026-03-18 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | F - Tax withholding / forfeiture | 25.6K | $21.43 | $550K |
| 2026-03-18 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | A - Grant or award | 67.5K | $0.00 | |
| 2025-09-09 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | G - Bona-fide gift | 2.1K | $0.00 | |
| 2024-11-08 | AOSL | ALPHA & OMEGA SEMICONDUCTOR Ltd | G - Bona-fide gift | 2.0K | $0.00 |
Companies - Last 90 Days
- ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) - 1 filing, last 2026-05-26
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Stephen Chunping Chang has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Yifan Liang - $1.11M of AOSL open-market activity in the last 12 months
- Bing Xue - $716K of AOSL open-market activity in the last 12 months
- Mike F. Chang - $641K of AOSL open-market activity in the last 12 months
- Claudia Chen - $161K of AOSL open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Joseph Stilwell
- William P. Stiritz
- SUMITOMO MITSUI FINANCIAL GROUP, INC.
- Suva
- SUVRETTA CAPITAL MANAGEMENT, LLC
- Donald William Swanson
- Synchron
- Kevin Tang
Frequently Asked Questions
Who is Stephen Chunping Chang?
Stephen Chunping Chang serves as Chief Executive Officer of ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL). Chang has reported 6 insider filings with the SEC since 2024. The most recent filing was in May 2026.…
How many SEC Form 4 filings has Stephen Chunping Chang submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Stephen Chunping Chang been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($691K) across all tracked filings.
Where can I see all of Stephen Chunping Chang's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Stephen Chunping Chang profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.