By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
Monolithic Power Systems Inc officers and board members have only been selling lately: 11 insiders sold off about $746.3 million of stock over 12 months, with no open-market purchases.
That's worth context: executives sell for plenty of routine reasons, from scheduled trading plans to tax bills. Buying is the rarer, more telling signal.
Members of Congress reported 9 trades in MPWR over the past two years (five members). 1,239 investment managers listed MPWR in their latest 13F filings (Q2 2026); more funds bought than sold. Looking at the quarterly pattern: 7 quarters in a row of net selling by insiders. Insiders bought in 0 of the last 7 full quarters.
Are insiders buying or selling MPWR stock?
In the last 12 months Monolithic Power Systems Inc insiders made open-market purchases worth about $0 and sales worth about $746.3 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in MPWR?
The most recent open-market insider trade in MPWR was filed on 2026-09-30.
How many institutions own MPWR?
1,239 investment managers reported holding MPWR in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded MPWR?
Yes. Members of Congress reported 9 trades in MPWR over the past two years. The full list is free on CapitalSnitch.
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Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).