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Monolithic Power Systems
MPWR · listed on Nasdaq · worth $57.36 billion
$1,167.27
+2.38% on Oct 26
Since Nov 11, 2025, no insider has bought Monolithic Power Systems stock. They sold it 228 times, $580.1 million in all. Two members of Congress reported trading Monolithic Power Systems in the last year.
Red dot = an insider soldA number = that many on nearby days · click a mark to see who, or read the filing
The shares anyone can buy and sell, leaving out those held by insiders and big long-term owners.
47.4M shares
96% of all shares
Shares borrowed and sold by investors who expect the price to drop.
Company insiders
Since Nov 11, 2025, nine insiders sold Monolithic Power Systems stock and none bought. 28 of the 228 sales are marked on the filing as planned in advance; most by company executives. The biggest seller was Michael Hsing, CEO.
Planned sales
Form 144 notices filed for Monolithic Power Systems in recent months, beside the Form 4 sales reported after each. A notice says a person intends to sell; it is not a sale.
CEO Michael Hsing filed to sell 30,000 shares on 28 Sep; sold 30,000 by 28 Sep10b5-1 plan adopted 29 May 2026 · Notice on SEC.gov
CFO Robert W. Dean II filed to sell 32 shares on 24 Aug; sold 32 by 24 AugNotice on SEC.gov
CFO Robert W. Dean II filed to sell 6 shares on 17 Aug; sold 6 by 17 AugNotice on SEC.gov
US Congress
Members of Congress who reported trading Monolithic Power Systems in the last year. They have up to 45 days to report, so the newest trades show up late.
MemberTradeAmountWhose accountTradedReported
All reports
Every insider trade and SEC report we hold for Monolithic Power Systems.
Newest first
ReportedTradeInsiderOf their holdingShares @ priceValue
Sep 30SoldMichael HsingSep 30 · Traded Sep 28 · CEO · A trade scheduled ahead of time under a written plan, so its timing was set before the day it happened.130 @ $1,356.94$176.4K
Sep 30SoldMichael HsingSep 30 · Traded Sep 28 · CEO · A trade scheduled ahead of time under a written plan, so its timing was set before the day it happened.10,967 @ $1,351.43$14.82M
Sep 30SoldMichael HsingSep 30 · Traded Sep 28 · CEO · A trade scheduled ahead of time under a written plan, so its timing was set before the day it happened.6,343 @ $1,347.15$8.54M
Sep 30SoldMichael HsingSep 30 · Traded Sep 28 · CEO · A trade scheduled ahead of time under a written plan, so its timing was set before the day it happened.5,783 @ $1,343.76$7.77M
Sep 30SoldMichael HsingSep 30 · Traded Sep 28 · CEO · A trade scheduled ahead of time under a written plan, so its timing was set before the day it happened.2,949 @ $1,338.66$3.95M
223 more with Pro →Analysts, earnings and news
Analysts' price target
$1,789.23 average
13 analysts
Analysts' opinions, which tend to run optimistic. Not our forecast or advice.
Profit vs what was expected
4 of 4 quarters above
Q1 '26$5.10 a share+$0.20
Q4 '25$4.79 a share+$0.05
Q3 '25$4.73 a share+$0.09
Q2 '25$4.21 a share+$0.09