Monolithic Power Systems, Inc.
MPWR- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001280452
In the last 90 days, Monolithic Power Systems, Inc. insiders filed 0 open-market purchases and 8 sales; 1,250 institutions reported holding it in 13F filings for Q2 2026, worth $65.6B in total; superinvestors D1 Capital Partners and Maverick Capital hold it.
Politicians who traded MPWR
Since 2020, newest trade first. Shares and options by default, including trades reported under an earlier ticker.
- Trades
- 14
- Filings
- 11
- Politicians
- 6
- Buys / sells
- 7 / 7
- Estimated volume
- $185.5K
- Sum of range midpoints
| Politician | Trades | Buys / sells | Est. volume | Last traded | Last filed |
|---|---|---|---|---|---|
 Byron Donalds House · FL | 2 | 0 / 2 | $16.0K | Jun 5, 2026 | Jul 15, 2026 |
 Markwayne Mullin Senate · OK | 3 | 3 / 0 | $97.5K | Feb 4, 2026 | Mar 2, 2026 |
 Michael Guest House · MS | 1 | 1 / 0 | $8.00K | Oct 20, 2025 | Nov 19, 2025 |
 Robert P. Bresnahan, Jr. House · PA | 2 | 1 / 1 | $16.0K | Apr 8, 2025 | May 8, 2025 |
 Tommy Tuberville Senate · AL | 5 | 2 / 3 | $40.0K | May 3, 2024 | Aug 5, 2026 |
 Donna E. Shalala House · FL | 1 | 0 / 1 | $8.00K | Jun 24, 2019 | Apr 27, 2020 |
Trades
Reported trades in Monolithic Power Systems, Inc., newest filings first.
| Politician | Asset | Type | Owner | Traded | Filed | Delay | Amount | Source |
|---|---|---|---|---|---|---|---|---|
Donna E. Shalala House · FL | MPWRMonolithic Power Systems, Inc. | Sell | Self | Jun 24, 2019 | Apr 27, 2020 | 308 daysLate | $1K-$15K | Filing |
Tommy Tuberville Senate · AL | MPWRMonolithic Power Systems, Inc. - Common Stock | Buy | Joint | Sep 30, 2021 | Oct 15, 2021 | 15 days | $1K-$15K | Filing |
Tommy Tuberville Senate · AL | MPWRMonolithic Power Systems, Inc. - Common Stock | Sell (partial) | Joint | Apr 3, 2023 | May 12, 2023Amended | 38 days | $1K-$15K | Filing |
Tommy Tuberville Senate · AL | MPWRMonolithic Power Systems, Inc. - Common Stock | Sell (partial) | Joint | Apr 3, 2023 | May 12, 2023Amended | 38 days | $1K-$15K | Filing |
Tommy Tuberville Senate · AL | MPWRMonolithic Power Systems, Inc. - Common Stock | Buy | Joint | Oct 17, 2023 | Nov 16, 2023 | 30 days | $1K-$15K | Filing |
Robert P. Bresnahan, Jr. House · PA | MPWRMonolithic Power Systems, Inc. - Common Stock | Sell | Joint | Jan 13, 2025 | Feb 13, 2025 | 31 days | $1K-$15K | Filing |
Robert P. Bresnahan, Jr. House · PA | MPWRMonolithic Power Systems, Inc. - Common Stock | Buy | Self | Apr 8, 2025 | May 8, 2025 | 30 days | $1K-$15K | Filing |
Michael Guest House · MS | MPWRMonolithic Power Systems, Inc. - Common Stock | Buy | Child | Oct 20, 2025 | Nov 19, 2025 | 30 days | $1K-$15K | Filing |
Markwayne Mullin Senate · OK | MPWRMonolithic Power Systems, Inc. - Common Stock | Buy | Self | Jan 5, 2026 | Feb 4, 2026 | 30 days | $15K-$50K | Filing |
Markwayne Mullin Senate · OK | MPWRMonolithic Power Systems, Inc. - Common Stock | Buy | Spouse | Jan 5, 2026 | Feb 4, 2026 | 30 days | $15K-$50K | Filing |
Markwayne Mullin Senate · OK | MPWRMonolithic Power Systems, Inc. - Common Stock | Buy | Joint | Feb 4, 2026 | Mar 2, 2026 | 26 days | $15K-$50K | Filing |
Byron Donalds House · FL | MPWRMonolithic Power Systems, Inc. - Common Stock | Sell (partial) | Spouse | Jun 5, 2026 | Jul 15, 2026 | 40 days | $1K-$15K | Filing |
Byron Donalds House · FL | MPWRMonolithic Power Systems, Inc. - Common Stock | Sell (partial) | Self | Jun 5, 2026 | Jul 15, 2026 | 40 days | $1K-$15K | Filing |
Tommy Tuberville Senate · AL | MPWRMonolithic Power Systems, Inc. - Common Stock | Sell (full) | Joint | May 3, 2024 | Aug 5, 2026Amended | 42 days | $1K-$15K | Filing |
Source: U.S. House Clerk and Senate Office of Public Records (eFD). Amounts are the ranges filers report. Profiles, committees and photos: the unitedstates project (public domain). District maps: U.S. Census Bureau.