MPWRMPWRMonolithic Power Systems, Inc. - Common Stock
7 members of Congress disclosed 19 transactions in MPWR between Dec 18, 2015 and Jun 5, 2026.
Price, with congressional trades marked
MPWR $1336.32 latest
+30%
Michael Guest, Republican
Michael Guest, Republican+41%
Markwayne Mullin, Republican
Markwayne Mullin, Republican+18%Markwayne Mullin, Republican
Markwayne Mullin, Republican
Byron Donalds, RepublicanMarked trades (4)
| Traded | Member | Amount | Adj. close | MPWR since | SPY since | Difference | |
|---|---|---|---|---|---|---|---|
| Oct 20, 2025 | Michael Guest (R) | buy | ~$8K | $1027.49 | +30.1% | +15.5% | +14.5% |
| Jan 5, 2026 | Markwayne Mullin (R) | buy | ~$33K | $950.88 | +40.5% | +12.4% | +28.1% |
| Feb 4, 2026 | Markwayne Mullin (R) | buy | ~$33K | $1133.64 | +17.9% | +12.7% | +5.2% |
| Jun 5, 2026 | Byron Donalds (R) | sell | ~$8K | $1475.52 | -9.4% | +4.6% | -14.0% |
Prices are dividend- and split-adjusted, so “adj. close” is not necessarily what the stock printed that day. The horizon runs to the latest close, so rows with different trade dates are not comparable to each other — and none of these is the benchmark-relative, fixed-window alpha the leaderboard ranks on.
19
Transactions
9 buys · 10 sells
7
Members
$226K
Est. volume
1D / 6R
Party split
distinct members
Transactions
19| Member | Type | Amount | Traded | Disclosed |
|---|---|---|---|---|
| Selljoint | $1K – $15K | May 3, 2024 | Aug 5, 2026 | |
| Sell (part) | $1K – $15K | Jun 5, 2026 | Jul 15, 2026 | |
| Sell (part)spouse | $1K – $15K | Jun 5, 2026 | Jul 15, 2026 | |
| Buyjoint | $15K – $50K | Feb 4, 2026 | Mar 2, 2026 | |
| Buy | $15K – $50K | Jan 5, 2026 | Feb 4, 2026 | |
| Buyspouse | $15K – $50K | Jan 5, 2026 | Feb 4, 2026 | |
| Buychild | $1K – $15K | Oct 20, 2025 | Nov 19, 2025 | |
| Buy | $1K – $15K | Apr 8, 2025 | May 8, 2025 | |
| Selljoint | $1K – $15K | Jan 13, 2025 | Feb 13, 2025 | |
| Selljoint | $1K – $15K | May 3, 2024 | Jun 14, 2024 | |
| Buyjoint | $1K – $15K | Oct 17, 2023 | Nov 16, 2023 | |
| Sell (part)joint | $1K – $15K | Apr 3, 2023 | May 12, 2023 | |
| Sell (part)joint | $1K – $15K | Apr 3, 2023 | May 12, 2023 | |
| Sell (part)joint | $1K – $15K | Apr 3, 2023 | May 11, 2023 | |
| Sell (part)joint | $1K – $15K | Apr 3, 2023 | May 11, 2023 | |
| Buyjoint | $1K – $15K | Sep 30, 2021 | Oct 15, 2021 | |
| Sell | $1K – $15K | Jun 24, 2019 | Apr 27, 2020 | |
| Buyjoint | $1K – $15K | Apr 1, 2016 | Apr 19, 2016 | |
| Buyjoint | $1K – $15K | Dec 18, 2015 | Jan 6, 2016 |
