Insider holders · CIK 0001280452
MONOLITHIC POWER SYSTEMS, INC. · MPWR
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| Michael HsingCEO | 1,146,137 | 133,040 | 1,279,177 | Feb 27, 2019 · 6:27 pm EST | Form 4 |
| James C MoyerDirector | 527,260 | 71,823 | 599,083 | Mar 12, 2019 · 5:00 pm EDT | Form 4 |
| Deming XiaoPres. of MPS Asia Operations | 353,856 | 1,101 | 354,957 | Feb 27, 2019 · 6:20 pm EST | Form 4 |
| Meera RaoCFO | 243,534 | — | 243,534 | Feb 9, 2016 · 5:31 pm EST | Form 4 |
| Saria TsengEVP & General Counsel | 142,218 | 1,000 | 143,218 | Sep 2, 2026 · 5:26 pm EDT | Form 4 |
| Maurice SciammasEVP, WW Sales & Marketing | 126,644 | 5,000 | 131,644 | Aug 6, 2026 · 8:31 pm EDT | Form 4 |
| Theodore BlegenCFO | 85,142 | — | 85,142 | Feb 21, 2019 · 5:20 pm EST | Form 4 |
| Victor K LeeDirector | 27,291 | — | 27,291 | Feb 12, 2019 · 6:04 pm EST | Form 4 |
| Pilkington Karen A Smith-Director | 22,996 | — | 22,996 | Apr 29, 2016 · 4:40 pm EDT | Form 4 |
| Jeff ZhouDirector | 21,491 | — | 21,491 | Feb 12, 2019 · 6:06 pm EST | Form 4 |
| Eugen J ElmigerDirector | 17,937 | — | 17,937 | Feb 12, 2019 · 6:02 pm EST | Form 4 |
| Robert W Dean IIInterim CFO | 7,089 | 65 | 7,154 | Aug 26, 2026 · 7:22 pm EDT | Form 4 |
| Kuo Wei Herbert ChangDirector | 515 | — | 515 | Aug 25, 2026 · 7:13 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.