Michael Hsing, CEO at MONOLITHIC POWER SYSTEMS, INC. (MPWR), sold 30,000 shares at $1323.31 ($40.3M) on 2026-09-28, disclosed to the SEC on 2026-09-30.
Scheduled sale ($40.3M) by CEO under a pre-arranged 10b5-1 plan. Pre-set trade — not a discretionary signal on the stock.
Negative factors outweigh the positive ones.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $1323.31 | 596 | $789K | 2.0% |
| 2 | $1328.54 | 2,121 | $2.8M | 7.0% |
| 3 | $1333.34 | 1,111 | $1.5M | 3.7% |
| 4 | $1338.66 | 2,949 | $3.9M | 9.8% |
| 5 | $1343.76 | 5,783 | $7.8M | 19.3% |
| 6 | $1347.15 | 6,343 |
| $8.5M |
| 21.2% |
| 7 | $1351.43 | 10,967 | $14.8M | 36.7% |
| 8 | $1356.94 | 130 | $176K | 0.4% |
| Total | $1344.97 avg | 30,000 | $40.3M | 100% |
| Filing → |
| MPWR | SELL | 2026-02-13 | $39.2M | — | Filing → |
| MPWR | SELL | 2026-02-12 | $38.8M | — | Filing → |
| MPWR | SELL | 2026-02-10 | $64.3M | — | Filing → |