Michael Hsing, CEO at MONOLITHIC POWER SYSTEMS INC (MPWR), sold 37,762 shares at $833.37 ($31.3M) on 2025-08-15, disclosed to the SEC on 2025-08-18.
Seasonal sale ($31.3M) by CEO — this insider has traded MPWR in August in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $825.69 | 2,603 | $2.1M | 6.9% |
| 2 | $825.69 | 2,603 | $2.1M | 6.9% |
| 3 | $826.64 | 2,555 | $2.1M | 6.7% |
| 4 | $826.64 | 2,555 | $2.1M | 6.7% |
| 5 | $827.72 | 3,878 | $3.2M | 10.3% |
| 6 | $827.72 | 3,878 |
| $3.2M |
| 10.3% |
| 7 | $828.64 | 396 | $328K | 1.0% |
| 8 | $828.64 | 396 | $328K | 1.0% |
| 9 | $829.45 | 4,101 | $3.4M | 10.9% |
| 10 | $829.45 | 4,101 | $3.4M | 10.9% |
| 11 | $830.46 | 2,100 | $1.7M | 5.6% |
| 12 | $831.57 | 1,953 | $1.6M | 5.2% |
| 13 | $831.57 | 1,953 | $1.6M | 5.2% |
| 14 | $832.57 | 1,510 | $1.3M | 4.0% |
| 15 | $832.57 | 1,510 | $1.3M | 4.0% |
| 16 | $833.37 | 535 | $446K | 1.4% |
| 17 | $833.37 | 535 | $446K | 1.4% |
| 18 | $834.92 | 200 | $167K | 0.5% |
| 19 | $836.40 | 400 | $335K | 1.1% |
| Total | $828.92 avg | 37,762 | $31.3M | 100% |
| Filing → |
| MPWR | SELL | 2026-02-17 | $38.7M | — | Filing → |
| MPWR | SELL | 2026-02-13 | $39.2M | — | Filing → |
| MPWR | SELL | 2026-02-12 | $38.8M | — | Filing → |