Alpha and Omega Semiconductor
Supplies discrete devices and power ICs for computing, consumer, communication, and industrial systems.
$24.57
After-hours close−0.04 (−0.18%)
At close$24.61(−6.18%)
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Breakdown13F · Form 4
Institutions 82.01%24.55M sharesInsiders 6.59%1.97M sharesOther 11.40%3.41M shares
Shares outstanding 29.93M · Float 24.14M · 80.7% free float
Institutions13F, as of Jun 30, 2026
229 holders · 24.55M shares · 66 new positions · 125 increased · 66 reduced · 29 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 4.26M | 14.22% | +351.8K | Aug 7, 2026 |
| State Street Corp | 2.35M | 7.84% | +945.9K | Aug 7, 2026 |
| Manufacturers Life Insurance Company, the | 1.38M | 4.59% | −199.4K | Aug 14, 2026 |
| Dimensional Fund Advisors LP | 1.34M | 4.46% | −228.8K | Aug 11, 2026 |
| Vanguard Portfolio Management LLC | 1.11M | 3.71% | −57.4K | Aug 13, 2026 |
| Vanguard Capital Management LLC | 1.07M | 3.58% | +19.7K | Aug 13, 2026 |
| Two Sigma Investments, LP | 951.6K | 3.18% | +398.6K | Aug 14, 2026 |
| FMR LLC | 791.7K | 2.65% | +247.0K | Aug 13, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Mike F. Chang | 14.10% | 4.13M | 13G | Feb 12, 2025 ↗ |
| BlackRock, Inc. | 12.70% | 3.74M | 13G | Apr 30, 2025 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Stephen Chunping Chang | director, officer: Chief Executive Officer | 634.1K | 2.12% | May 26, 2026 |
| Mike F. Chang | director, 10 percent owner: | 560.5K | 1.87% | Aug 14, 2026 |
| Yifan Liang | officer: CFO and Corp Secretary | 269.4K | 0.90% | Apr 30, 2026 |
| Bing Xue | officer: EVP-WW Sales & Bus Development | 122.8K | 0.41% | Jul 17, 2026 |
| King Owyang | director | 75.3K | 0.25% | Nov 12, 2025 |
| Michael L. Pfeiffer | director | 71.3K | 0.24% | Nov 12, 2025 |
| Wenjun Li | officer: Chief Operating Officer | 66.6K | 0.22% | Mar 25, 2026 |
| Michael J. Salameh | director | 64.8K | 0.22% | Nov 12, 2025 |
| Lucas S. Chang | director | 30.9K | 0.10% | Nov 12, 2025 |
| Claudia Chen | director | 28.2K | 0.09% | May 26, 2026 |
1 ten-percent owner holds 26.0K shares by Form 4, outside the officers-and-directors figure above · 8 people have not refiled in the last 18 months (328.0K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jul 16, 2026 | Bing Xueofficer: EVP-WW Sales & Bus Development | Sale | 875 | $33.99 | 122,785 |
| Jun 16, 2026 | Bing Xueofficer: EVP-WW Sales & Bus Development | Sale | 4,916 | $47.09 | 123,660 |
| May 22, 2026 | Claudia Chendirector | Sale · 2 lots | 4,061 | $39.53 | 28,192 |
| May 18, 2026 | Bing Xueofficer: EVP-WW Sales & Bus Development | Sale | 4,916 | $41.00 | 127,701 |
| Apr 16, 2026 | Bing Xueofficer: EVP-WW Sales & Bus Development | Sale | 1,832 | $31.21 | 132,617 |
| Apr 17, 2026 | Stephen Chunping Changdirector, officer: Chief Executive Officer | Sale · 3 lots | 14,884 | $34.47 | 635,901 |
| Apr 17, 2026 | Yifan Liangofficer: CFO and Corp Secretary | Sale | 8,625 | $35.00 | 270,003 |
| Apr 14, 2026 | Stephen Chunping Changdirector, officer: Chief Executive Officer | Sale | 5,594 | $31.90 | 650,785 |
| Apr 14, 2026 | Yifan Liangofficer: CFO and Corp Secretary | Sale · 3 lots | 26,517 | $30.57 | 278,628 |
| Mar 16, 2026 | Bing Xueofficer: EVP-WW Sales & Bus Development | Sale | 2,408 | $21.92 | 113,631 |
CongressHouse and Senate disclosures
Not reported.