CIK 0001280452 · Large accelerated filer
MONOLITHIC POWER SYSTEMS, INC.
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- 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 |
|---|---|---|---|---|---|---|
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −204 | $1,013.62 | $207K | 77,128 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −135 | $1,014.47 | $137K | 76,993 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $1,016.51 | $81K | 76,913 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −6 | $1,017.78 | $6K | 76,907 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −180 | $1,018.01 | $183K | 76,727 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −181 | $1,019.49 | $185K | 76,546 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −160 | $1,020.30 | $163K | 76,386 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −168 | $1,021.28 | $172K | 76,218 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −40 | $1,022.28 | $41K | 76,178 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −291 | $1,023.32 | $298K | 75,887 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −208 | $1,024.86 | $213K | 75,679 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −43 | $1,025.91 | $44K | 75,636 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −200 | $1,027.49 | $205K | 75,436 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −240 | $1,028.43 | $247K | 75,196 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −246 | $1,029.45 | $253K | 74,950 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −210 | $1,030.00 | $216K | 74,740 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −17 | $1,031.86 | $18K | 74,723 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −184 | $1,032.07 | $190K | 74,539 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $1,033.00 | $83K | 74,459 |
| 2025-11-03 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −40 | $1,034.99 | $41K | 74,419 |
Page 17 of 59 · 1,177 trades