Alpha & Omega Semiconductor Limited
A maker of power semiconductors, Alpha & Omega Semiconductor designs the chips inside everyday electronics—from laptops and smartphones to TVs and tablets—that manage, convert, and protect their electrical power. Founded in 2000 in Sunnyvale, California, the company was started by Dr. Mike Chang and fellow engineers from Siliconix. Its name comes from the Greek letters Alpha and Omega, the first and last of the alphabet, hinting at a full spectrum of power solutions from start to finish.
Granted 1.62M · Bought 184.6K · Sold 686.8K
Bought 27.4K · Sold 343.3K
Sold 481.5K
Granted 583.0K · Sold 20.5K
Granted 648.1K · Sold 258.9K
Granted 448.0K · Sold 489.9K
Granted 291.2K · Sold 134.5K
Granted 75.3K
Granted 74.6K · Sold 3.3K
Granted 99.2K · Sold 19.8K
Granted 75.3K · Bought 20.5K · Sold 30.9K
Granted 159.6K · Sold 116.1K
Granted 56.1K · Sold 23.9K
Granted 101.2K · Sold 79.0K
Granted 37.9K · Sold 9.7K
Granted 37.4K · Sold 13.3K
Granted 23.8K
Granted 23.8K
Granted 13.5K · Sold 2.6K
Granted 9.1K
Bought 1.2K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Chang Mike FDirector, 10% owner · 135 transactions | — | 4.36M | 1.62M | 184.6K | 686.8K |
| Stevens Mark ADirector, 10% owner · 54 transactions | — | 2.70Mas of Sep 2012 | — | 27.4K | 343.3K |
| SCGF III Management LLC +3 co-filers10% owner · 63 transactions | — | 2.52Mas of Dec 2012 | — | — | 481.5K |
| Chang Stephen ChunpingChief Executive Officer, Director · 44 transactions | — | 634.1K | 583.0K | — | 20.5K |
| Liang YifanCFO and Corp Secretary · 135 transactions | — | 269.4K | 648.1K | — | 258.9K |
| Ho Yueh-SeDirector · 92 transactions | — | 193.6Kas of Nov 2021 | 448.0K | — | 489.9K |
| Xue BingEVP-WW Sales & Bus Development · 91 transactions | — | 123.7K | 291.2K | — | 134.5K |
| Owyang KingDirector · 14 transactions | — | 75.3K | 75.3K | — | — |
| Pfeiffer Michael LDirector · 17 transactions | — | 71.3K | 74.6K | — | 3.3K |
| Li WenjunChief Operating Officer · 29 transactions | — | 68.8K | 99.2K | — | 19.8K |
| Salameh Michael JDirector · 26 transactions | — | 64.8K | 75.3K | 20.5K | 30.9K |
| Chang Daniel Kuang MingSenior VP of Marketing · 63 transactions | — | 46.5Kas of Mar 2019 | 159.6K | — | 116.1K |
| Chang Lucas S.Director · 16 transactions | — | 30.9K | 56.1K | — | 23.9K |
| Grizelj TonyVP of Power Discrete Product · 59 transactions | — | 28.4Kas of Jun 2015 | 101.2K | — | 79.0K |
| Chen ClaudiaDirector · 12 transactions | — | 28.4K | 37.9K | — | 9.7K |
| Chen Robert IDirector · 10 transactions | — | 24.0Kas of Nov 2018 | 37.4K | — | 13.3K |
| Jeong So-YeonDirector · 5 transactions | — | 23.8K | 23.8K | — | — |
| Li HanqingDirector · 5 transactions | — | 23.8K | 23.8K | — | — |
| Yilmaz HamzaChief Technology Officer · 27 transactions | — | 16.8Kas of Mar 2015 | 13.5K | — | 2.6K |
| Dotz MaryChief Financial Officer · 8 transactions | — | 10.2Kas of Sep 2013 | 9.1K | — | — |
| Bailey HowardDirector · 2 transactions | — | 229as of Sep 2011 | — | 1.2K | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -2.48M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.