CIK 0001280452 · Large accelerated filer
MONOLITHIC POWER SYSTEMS, INC.
Sign in to watch- Ticker
- MPWR
- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 770466789
- Phone
- 561-839-3999
- Business address
- 1555 PALM BEACH LAKES BLVD., WEST PALM BEACH, FL, 33401
- Former names
- MONOLITHIC POWER SYSTEMS INC
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $40,463,134
- in 4 filings, $40.3M under 10b5-1 plans
Net −$40,463,134. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −240 | $1,128.43 | $271K | 67,432 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −240 | $1,129.28 | $271K | 67,192 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −320 | $1,130.48 | $362K | 66,872 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −198 | $1,131.70 | $224K | 66,674 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −322 | $1,132.67 | $365K | 66,352 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −379 | $1,133.47 | $430K | 65,973 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −241 | $1,134.41 | $273K | 65,732 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −120 | $1,135.49 | $136K | 65,612 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −120 | $1,136.35 | $136K | 65,492 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $1,137.81 | $91K | 65,412 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $1,139.49 | $91K | 65,333 |
| 2026-01-02 | Lee Victor K Director | Sale 10b5-1 | −600 | $930.86 | $559K | 27,967 |
| 2026-01-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $927.61 | $74K | 71,252 |
| 2026-01-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −194 | $930.86 | $181K | 71,058 |
| 2026-01-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $933.64 | $75K | 70,978 |
| 2026-01-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −40 | $934.74 | $37K | 70,938 |
| 2026-01-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $935.33 | $75K | 70,858 |
| 2026-01-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −120 | $936.50 | $112K | 70,738 |
| 2026-01-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −460 | $938.52 | $432K | 70,278 |
| 2026-01-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −117 | $939.75 | $110K | 70,161 |
Page 10 of 59 · 1,177 trades