CapitolRadar tracks every publicly disclosed MPWR trade by US congress members and corporate insiders: 24 disclosed trades (11 buys, 13 sells) by 3 tracked traders, from 2021-09-30 to 2026-02-04. Updated daily from official filings.
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Monolithic Power Systems, Inc. (MPWR) — Technology · Semiconductors, market cap about $59.5B.
CapitolRadar analysis
24 trades split narrowly between buys and sells
24 tracked MPWR trades comprise 11 buys and 13 sells by 3 distinct traders from September 30, 2021 through February 4, 2026. That is a near-balanced directional split, with sells exceeding buys by 2 transactions. The sample is small—both in total activity and trader count—so the record reflects a limited set of disclosures rather than broad congressional participation in Monolithic Power Systems, a Technology-sector semiconductor company.
5 trades made 2024 Q1 the busiest listed quarter
5 trades were recorded in 2024 Q1, including 2 buys and 3 sells, the largest count among the quarters provided. The next-highest listed totals were 3 trades in 2022 Q4, with 1 buy, and 3 in 2026 Q1, with 2 buys. Other reported quarters were smaller: 2 trades each in 2022 Q3, 2023 Q2 and 2023 Q4; and 1 trade each in 2023 Q1 and 2024 Q2. The quarterly sample is uneven and remains too small to establish a durable trading pattern.
7 of 11 buys came from Ro Khanna
7 buys were attributed to Ro Khanna, whose latest listed purchase was March 20, 2024. Markwayne Mullin and Tommy Tuberville each accounted for 2 buys, with latest purchases on February 4, 2026 and October 17, 2023, respectively. Together, these three traders account for all 11 tracked buys. One of the buyers also purchased each of AJG, BAC, CCL, CVS, FDS and IBM, but the data does not identify whether the same buyer made all six purchases or provide enough activity to infer a broader strategy.
Congressional transaction reports can be filed up to 45 days after a trade, so disclosures may not represent real-time activity. Reported transaction values are generally given as ranges, making any dollar amounts estimates; no amount ranges are provided here. Trade counts also measure transactions, not position size, conviction or current ownership.
Analysis written from the tracked record on 2026-09-03; it is refreshed whenever the underlying numbers change.
Activity by quarter
| Quarter | Disclosed trades | Buys | Sells |
|---|---|---|---|
| 2026 Q1 | 3 | 2 | 1 |
| 2024 Q2 | 1 | 0 | 1 |
| 2024 Q1 | 5 | 2 | 3 |
| 2023 Q4 | 2 | 1 | 1 |
| 2023 Q2 | 2 | 0 | 2 |
| 2023 Q1 | 1 | 1 | 0 |
| 2022 Q4 | 3 | 1 | 2 |
| 2022 Q3 | 2 | 1 | 1 |
Who is buying MPWR?
| Trader | Disclosed buys | Last buy | Grade |
|---|---|---|---|
| Ro Khanna | 7 | 2024-03-20 | — |
| Markwayne Mullin | 2 | 2026-02-04 | — |
| Tommy Tuberville | 2 | 2023-10-17 | — |
Disclosed trades in MPWR
| Date | Who | Type | Amount | 30d vs SPY |
|---|---|---|---|---|
| 2026-02-04 | Markwayne Mullin | buy | $15,001 - $50,000 | — |
| 2026-01-29 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2026-01-05 | Markwayne Mullin | buy | $15,001 - $50,000 | — |
| 2024-05-03 | Tommy Tuberville | sell | $1,001 - $15,000 | — |
| 2024-03-25 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2024-03-20 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2024-02-13 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2024-02-13 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2024-01-10 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2023-10-26 | Ro Khanna | sell | $15,001 - $50,000 | — |
| 2023-10-17 | Tommy Tuberville | buy | $1,001 - $15,000 | — |
| 2023-06-15 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2023-04-03 | Tommy Tuberville | sell | $1,001 - $15,000 | — |
| 2023-01-09 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2022-11-03 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2022-11-02 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2022-10-20 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2022-09-29 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2022-09-06 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2022-06-17 | Ro Khanna | sell | $1,001 - $15,000 | — |
These buyers also bought
Other stocks the tracked buyers of MPWR disclosed buying in the last six months: ADI (1) · APP (1) · BMO (1) · CHWY (1) · CRM (1) · DOV (1).
About Monolithic Power Systems, Inc.
Monolithic Power Systems, Inc. specializes in the creation, promotion, and sale of advanced semiconductor components for power management. Their innovative solutions cater to a broad spectrum of industries, including information technology, data storage, automotive, industrial applications, telecommunications, and consumer electronics. A core offering consists of direct current (DC) to DC integrated circuits (ICs), which are vital for regulating and transforming electrical voltages in diverse systems such as portable gadgets, wireless local area network access points, personal computers, displ…
Frequently asked questions
Which politicians bought MPWR most?
Ro Khanna leads with 7 disclosed buys, followed by Markwayne Mullin.
How current is this page?
It re-renders from the tracked record on every view and new filings are ingested daily — but STOCK Act disclosures can lag the trade by up to 45 days, so the most recent weeks are always incomplete.
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CapitolRadar tracks publicly disclosed trades (STOCK Act filings and SEC Form 4). Disclosures can lag the trade by up to 45 days. Backtests measure past disclosed buys against the S&P 500 and do not predict future results. Everything on this page is impersonal information for your own research — not investment advice.