7 U.S. lawmakers have disclosed 15 Monolithic Power Systems, Inc. - trades under the STOCK Act — 9 buys and 6 sells between 2015 and 2026. Congress has been net buyers of MPWR, and their disclosed buys are up 41.3% versus the latest close.
*Notional-weighted price return on lawmakers' disclosed buys of MPWR, marked to the latest close — per-share (share counts aren't disclosed).
1 member disclosed a MPWR purchase in the last 90 days (newest first).
Lawmakers ranked by notional-weighted return on their disclosed MPWR buys (last ~3y), marked to the latest close.
| Date | Member | Type | Amount | Est. price | Latest close | Return |
|---|---|---|---|---|---|---|
| 2026-06-18 | Rohit Khanna | BUY | $1K–$15K | $1563.70 | $1362.55 2026-08-13 | -12.9% |
| 2026-06-05 | Byron Donalds | SELL | $1K–$15K | $1481.05 | $1362.55 2026-08-13 | +302.7% rt |
| 2026-02-04 | Markwayne Mullin | BUY | $15K–$50K | $1136.83 | $1362.55 2026-08-13 | +19.9% |
| 2026-01-05 | Markwayne Mullin | BUY | $15K–$50K | $955.03 | $1362.55 2026-08-13 | +42.7% |
| 2025-10-20 | Michael Patrick Guest | BUY | $1K–$15K | $1031.59 | $1362.55 2026-08-13 | +32.1% |
| 2024-05-03 | Thomas H Tuberville | SELL | $1K–$15K | $707.22 | $1362.55 2026-08-13 | +48.4% rt |
| 2024-05-03 | Thomas H Tuberville | SELL | $1K–$15K | $707.22 | $1362.55 2026-08-13 | -92.7% exit |
| 2023-10-17 | Thomas H Tuberville | BUY | $1K–$15K | $476.56 | $1362.55 2026-08-13 | +185.9% |
| 2023-04-03 | Thomas H Tuberville | SELL | $1K–$15K | $492.97 | $1362.55 2026-08-13 | -176.4% exit |
| 2023-04-03 | Thomas H Tuberville | SELL | $1K–$15K | $492.97 | $1362.55 2026-08-13 | +1.7% rt |
| 2022-12-07 | Byron Donalds | BUY | $1K–$15K | $367.77 | $1362.55 2026-08-13 | +270.5% |
| 2021-09-30 | Thomas H Tuberville | BUY | $1K–$15K | $484.68 | $1362.55 2026-08-13 | +181.1% |
| 2018-11-16 | DIANNE FEINSTEIN | SELL | $1K–$15K | $127.83 | $1362.55 2026-08-13 | -965.9% exit |
| 2016-04-01 | James B. Renacci | BUY | $1K–$15K | $64.45 | $1362.55 2026-08-13 | +2014.1% |
| 2015-12-18 | James B. Renacci | BUY | $1K–$15K | $63.15 | $1362.55 2026-08-13 | +2057.6% |
Return: buys marked to the latest close (open); sells tagged rt are realized round-trips vs a prior disclosed buy; exit = timing (stock move after the sale, seller's perspective).
7 members of the U.S. House and Senate have disclosed Monolithic Power Systems, Inc. - transactions under the STOCK Act — 9 purchases and 6 sales. The full member-by-member breakdown, with dates and dollar ranges, is in the table above.
1 member disclosed a MPWR purchase in the last 90 days — most recently Rohit Khanna on 2026-06-18. See the "Lawmakers who bought MPWR recently" section above for the dated list.
Notional-weighted, lawmakers' disclosed MPWR buys are up 41.3% versus the latest close of $1362.55. Each trade's own return — and realized round-trips on matched sells — is in the Return column.
Yes. Under the 2012 STOCK Act, members of Congress may buy and sell individual stocks but must publicly disclose each transaction within 45 days. Bargo surfaces those filings so you can see who traded MPWR and how it performed.