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 847.0K · Bought 33.7K · Sold 292.8K
Granted 530.6K · Sold 20.5K
Granted 362.2K · Sold 159.3K
Granted 24.0K · Sold 51.7K
Granted 230.4K · Sold 92.0K
Granted 31.3K
Granted 30.7K · Sold 3.3K
Granted 99.2K · Sold 19.8K
Granted 31.3K · Sold 30.9K
Granted 23.8K · Sold 15.9K
Granted 23.8K · Sold 9.7K
Granted 23.8K
Granted 23.8K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Chang Mike FDirector, 10% owner · 52 transactions | — | 4.36M | 847.0K | 33.7K | 292.8K |
| Chang Stephen ChunpingChief Executive Officer, Director · 32 transactions | +132.5% | 634.1K | 530.6K | — | 20.5K |
| Liang YifanCFO and Corp Secretary · 50 transactions | +99.1% | 269.4K | 362.2K | — | 159.3K |
| Ho Yueh-SeDirector · 4 transactions | -12.5% | 193.6Kas of Nov 2021 | 24.0K | — | 51.7K |
| Xue BingEVP-WW Sales & Bus Development · 64 transactions | +124% | 123.7K | 230.4K | — | 92.0K |
| Owyang KingDirector · 6 transactions | +71.2% | 75.3K | 31.3K | — | — |
| Pfeiffer Michael LDirector · 9 transactions | +62.2% | 71.3K | 30.7K | — | 3.3K |
| Li WenjunChief Operating Officer · 29 transactions | +267.2% | 68.8K | 99.2K | — | 19.8K |
| Salameh Michael JDirector · 14 transactions | +0.6% | 64.8K | 31.3K | — | 30.9K |
| Chang Lucas S.Director · 9 transactions | +31.8% | 30.9K | 23.8K | — | 15.9K |
| Chen ClaudiaDirector · 10 transactions | +101.8% | 28.4K | 23.8K | — | 9.7K |
| Jeong So-YeonDirector · 5 transactions | — | 23.8K | 23.8K | — | — |
| Li HanqingDirector · 5 transactions | — | 23.8K | 23.8K | — | — |
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 the last 5 years: -662.2K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.