MONOLITHIC POWER SYSTEMS, INC. (MPWR) has 1,279 open-market insider trades by 19 insiders since 2006. Over the last six months insiders net sold $153.5M. The most active filer is Deming Xiao, VP.
| Name | Title | Tier | Trades | Value | Last Trade |
|---|---|---|---|---|---|
| Michael Hsing | CEO | — | 201 | $1.3B | 2026-09-28 |
| Maurice Sciammas | VP | — | 186 | $449.4M | 2026-08-04 |
| Saria Tseng | CLOVP | — | 172 | $422.8M | 2026-08-31 |
| Deming Xiao | VP | — | 266 | $410.7M | 2026-05-06 |
| Theodore Blegen | CFOVP | — | 135 | $189.6M | 2026-02-06 |
| James C. Moyer | Dir | — | 78 | $136.3M | 2024-08-29 |
| Kuo Wei Herbert Chang | Dir | — | 94 | $60.6M | 2026-08-24 |
| Eugen J. Elmiger | Dir | — | 2 | $22.4M | 2026-05-06 |
| Jeff Zhou | Dir | — | 34 | $10.1M | 2026-05-26 |
| Victor K. Lee | Dir | — | 17 | $6.9M | 2026-02-09 |
| Insider | Title | Type | Value | Date |
|---|---|---|---|---|
| Michael Hsing | CEO | Sell | $40.3M | 2026-09-28 |
| Kuo Wei Herbert Chang | Director | Sell | $64K | 2026-08-24 |
| Robert W. Dean II | CFO | Sell | $42K | 2026-08-24 |
| Robert W. Dean II | CFO | Sell | $8K | 2026-08-17 |
| Kuo Wei Herbert Chang | Director | Sell | $71K | 2026-08-11 |
| Robert W. Dean II | CFO | Sell | $141K | 2026-08-05 |
Companies that share insiders with MPWR, and sector peers with recent insider buying. Related by who files, not by how the stocks move.
| Maurice Sciammas | VP | Sell | $40K | 2026-08-03 |
| Maurice Sciammas | VP | Sell | $20.2M | 2026-07-15 |
| Maurice Sciammas | VP | Sell | $41K | 2026-07-01 |
| Maurice Sciammas | VP | Sell | $46K | 2026-06-01 |
| Saria Tseng | CLO & VP | Sell | $12.9M | 2026-05-27 |
| Robert W. Dean II | CFO | Sell | $36K | 2026-05-26 |
| Jeff Zhou | Director | Sell | $816K | 2026-05-26 |
| Saria Tseng | CLO & VP | Sell | $7.9M | 2026-05-22 |
| Michael Hsing | CEO | Sell | $59.3M | 2026-05-18 |