SEC Form 4 · Updated Daily
AOSL
— ALPHA AND OMEGA SEMICONDUCTOR LIMITED OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Chang Mike F | 10%+ Owner · Director | 3,698,839 | 2026-08-24 | G |
| STEVENS MARK A | Director | 2,500,226 | 2012-09-14 | S |
| SCGF III MANAGEMENT LLC | 10%+ Owner | 2,410,975 | 2012-12-13 | S |
| SEQUOIA CAPITAL GROWTH PARTNERS III | 10%+ Owner | 2,410,975 | 2012-12-13 | S |
| SEQUOIA CAPITAL GROWTH III PRINCIPALS FUND | 10%+ Owner | 2,410,975 | 2012-12-13 | S |
| Sequoia Capital Growth Fund III AIV L P | 10%+ Owner | 2,410,975 | 2012-12-13 | S |
| Liang Yifan | Officer | 269,703 | 2026-04-27 | G |
| Ho Yueh-Se | Director | 193,592 | 2021-11-11 | A |
| Xue Bing | Officer | 122,785 | 2026-07-16 | S |
| Chang Stephen Chunping | Director · Officer | 100,947 | 2026-08-24 | G |
| Li Wenjun | Officer | 86,558 | 2026-03-16 | A |
| OWYANG KING | Director | 75,256 | 2025-11-11 | A |
| Pfeiffer Michael L | Director | 71,294 | 2025-11-11 | A |
| SALAMEH MICHAEL J | Director | 64,824 | 2025-11-11 | A |
| Chang Daniel Kuang Ming | Officer | 46,543 | 2019-03-29 | S |
| Chang Lucas S. | Director | 30,885 | 2025-11-11 | A |
| Grizelj Tony | Officer | 28,412 | 2015-06-26 | F |
| Chen Claudia | Director | 28,409 | 2026-05-22 | S |
| CHEN ROBERT I | Director | 24,030 | 2018-11-09 | A |
| Li Hanqing | Director | 23,800 | 2025-11-11 | A |
| Jeong So-Yeon | Director | 23,800 | 2025-11-11 | A |
| YILMAZ HAMZA | Officer | 16,768 | 2015-03-26 | F |
| Kwok Ephraim | Officer | 13,750 | 2011-07-01 | — |
| Dotz Mary | Director | 10,189 | 2013-09-26 | F |
| SEVCIK RICHARD W | Director | 3,600 | 2011-07-01 | — |
| Chien Joshua C. | Director | 1,368 | 2026-07-20 | A |
| BAILEY HOWARD | Director | 1,229 | 2011-09-12 | P |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-24 | Chang Mike F | Gift | 100,947 | $0.00 | 3,698,839 |
| 2026-08-24 | Chang Stephen Chunping | Gift | 100,947 | $0.00 | 100,947 |
| 2026-08-13 | Chang Mike F | Gift | 3,000,000 | $0.00 | 560,540 |
| 2026-07-20 | Chien Joshua C. | Grant / award | 1,368 | $0.00 | 1,368 |
| 2026-07-16 | Xue Bing | Open-market sale | 875 | $33.99 | 122,785 |
| 2026-07-13 | Chang Mike F | Gift | 23,754 | $0.00 | 3,560,540 |
| 2026-06-16 | Xue Bing | Open-market sale | 4,916 | $47.09 | 123,660 |
| 2026-06-01 | Chang Mike F | Gift | 30,000 | $0.00 | 3,584,294 |
| 2026-05-26 | Chang Mike F | Gift | 39,780 | $0.00 | 3,614,294 |
| 2026-05-22 | Chen Claudia | Open-market sale | 217 | $40.54 | 28,192 |
| 2026-05-22 | Chen Claudia | Open-market sale | 3,844 | $39.47 | 28,409 |
| 2026-05-22 | Chang Mike F | Gift | 736,252 | $0.00 | 3,654,074 |
| 2026-05-21 | Chang Stephen Chunping | Gift | 2,000 | $0.00 | 634,070 |
| 2026-05-18 | Xue Bing | Open-market sale | 4,916 | $41.00 | 127,701 |
| 2026-04-28 | Liang Yifan | Gift | 300 | $0.00 | 269,403 |
| 2026-04-27 | Liang Yifan | Gift | 300 | $0.00 | 269,703 |
| 2026-04-17 | Chang Stephen Chunping | Open-market sale | 9,911 | $34.90 | 635,901 |
| 2026-04-17 | Chang Stephen Chunping | Open-market sale | 3,481 | $33.90 | 645,812 |
| 2026-04-17 | Chang Stephen Chunping | Open-market sale | 1,492 | $32.90 | 649,293 |
| 2026-04-17 | Liang Yifan | Open-market sale | 8,625 | $35.00 | 270,003 |
| 2026-04-16 | Xue Bing | Open-market sale | 1,832 | $31.21 | 132,617 |
| 2026-04-14 | Chang Stephen Chunping | Open-market sale | 5,594 | $31.90 | 650,785 |
| 2026-04-14 | Liang Yifan | Open-market sale | 11,187 | $32.00 | 278,628 |
| 2026-04-14 | Liang Yifan | Open-market sale | 7,939 | $30.00 | 289,815 |
| 2026-04-14 | Liang Yifan | Open-market sale | 7,391 | $29.00 | 297,754 |
| 2026-03-16 | Chang Mike F | Grant / award | 22,500 | $0.00 | 4,386,761 |
| 2026-03-16 | Chang Mike F | Tax withholding | 9,829 | $21.43 | 4,364,261 |
| 2026-03-16 | Chang Mike F | Tax withholding | 17,984 | $21.43 | 4,374,090 |
| 2026-03-16 | Chang Mike F | Grant / award | 22,500 | $0.00 | 4,392,074 |
| 2026-03-16 | Chang Stephen Chunping | Grant / award | 67,500 | $0.00 | 656,379 |
| 2026-03-16 | Chang Stephen Chunping | Tax withholding | 17,839 | $21.43 | 588,879 |
| 2026-03-16 | Chang Stephen Chunping | Tax withholding | 25,644 | $21.43 | 606,718 |
| 2026-03-16 | Chang Stephen Chunping | Grant / award | 67,500 | $0.00 | 632,362 |
| 2026-03-16 | Liang Yifan | Grant / award | 22,500 | $0.00 | 305,145 |
| 2026-03-16 | Liang Yifan | Tax withholding | 4,610 | $21.43 | 282,645 |
| 2026-03-16 | Liang Yifan | Tax withholding | 6,889 | $21.43 | 287,255 |
| 2026-03-16 | Liang Yifan | Grant / award | 22,500 | $0.00 | 294,144 |
| 2026-03-16 | Xue Bing | Grant / award | 15,000 | $0.00 | 134,449 |
| 2026-03-16 | Xue Bing | Tax withholding | 3,584 | $21.43 | 119,449 |
| 2026-03-16 | Xue Bing | Tax withholding | 5,598 | $21.43 | 123,033 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.