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MONOLITHIC POWER SYSTEMS, INC. (MPWR) S&P 500 XNAS SEMICONDUCTORS & RELATED DEVICES Net insider selling (90d)
Latest MPWR Insider Trades
About MONOLITHIC POWER SYSTEMS, INC. (MPWR) Monolithic Power Systems is a power chipmaker specializing in voltage regulators. Its mission is to reduce total energy consumption in end systems to improve performance and save customers cost. It serves the data center, automotive, industrial, communications, and consumer end markets. MPS uses a fabless manufacturing model, partnering with third-party chip foundries to host its proprietary BCD process technology.
Headquarters WEST PALM BEACH, FL
Employees 4,501
Listed 2004
Exchange XNAS https://www.monolithicpower.com SEC filings for MPWR on EDGAR
90-Day SEC Filing Activity Form 4 transaction type Transactions Shares Total value Open-market sale 25 15,303 $20.65M Grant or award 1 1,359 Bona-fide gift 4 54,000
MPWR Insider Transactions (Form 4) 127 107 Form 4 filings on record, the earliest from Oct 2, 2024, newest first. Filing history page 3 of 3.
Date Insider Transaction Security Shares Price Value Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 699
Recent MPWR Form 8-K Filings 4
Recent MPWR Form 144 Notices of Proposed Sale 3 A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
Filed Filer Relationship Shares Market value Notice Aug 24, 2026 DEAN ROBERT W II Officer 32 $42K View on EDGAR Aug 17, 2026 DEAN ROBERT W II Officer
MPWR Insider Trading - FAQ
What is the latest insider trade for MPWR? MONOLITHIC POWER SYSTEMS, INC. (MPWR) had 11 insider filings in the last 90 days, with the most recent on 2026-09-02. The full record for MPWR runs to 107 Form 4 filings, the earliest from 2024-10-02. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying MPWR stock? No insider purchases of MPWR were filed in the last 90 days.
How many insiders are selling MPWR stock? 25 insider sales of MPWR were filed in the last 90 days, totaling $20.65M.
Where can I see MPWR SEC filings (Form 4, 10-K, 10-Q, 8-K)? This page tracks MPWR Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow MPWR insider buys? Create a free InsiderAlpha account and press Watch on this page to add MPWR to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Information Technology Companies with Insider Activity Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Related Companies - Recent Insider Activity What is SEC Form 4? The filing insiders must submit within two business days of a trade, and how to read its transaction codes. Track MPWR insider activity as it files Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
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Market cap $56.40B
P/E ratio 72.10
Dividend yield 0.68%
Average volume 889.8K
52 week high $1,714.09
52 week low $833.18
Today's high -
Today's low -
Open -
Volume -
Previous close $1,169.58
Shares outstanding 49.14M Market cap
$56.40B
4,501 employees
MPWR Insider Sentiment - Last 90 Days Share of open-market insider dollar volume that was buying versus selling, from SEC Form 4 filings.
0% Buying 100% Selling
0 insider purchases totaling $0 against 25 sales totaling $20.65M.
Most-Active MPWR Insiders - Last 90 Days 10 Other acquisition / disposition 1 5
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 723 $868.42 $628K
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 1,842 $869.39 $1.60M
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 320 $870.36 $279K
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 220 $871.45 $192K
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 574 $872.80 $501K
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 1,146 $873.78 $1.00M
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 731 $874.50 $639K
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 160 $863.86 $138K
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 40 $865.89 $35K
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 240 $862.58 $207K
Nov 19, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 339 $866.19 $294K
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 797 $956.50 $762K
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 1,020 $957.71 $977K
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 2,500 $958.59 $2.40M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 4,010 $959.45 $3.85M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 2,734 $960.45 $2.63M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 3,900 $961.47 $3.75M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 4,172 $962.57 $4.02M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 1,894 $963.41 $1.82M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 739 $964.38 $713K
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 321 $965.44 $310K
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 1,246 $966.30 $1.20M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 154 $967.15 $149K
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 80 $951.69 $76K
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 1,516 $952.62 $1.44M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 2,927 $953.69 $2.79M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 7,934 $954.61 $7.57M
Nov 11, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 4,056 $955.46 $3.88M
Nov 5, 2025 MS Maurice Sciammas - Officer Open-market sale Common Stock 200 $986.81 $197K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 181 $1,019.49 $185K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 160 $1,020.30 $163K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 168 $1,021.28 $172K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 40 $1,022.28 $41K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 291 $1,023.32 $298K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 208 $1,024.86 $213K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 43 $1,025.91 $44K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 200 $1,027.49 $205K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 240 $1,028.43 $247K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 246 $1,029.45 $253K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 210 $1,030.00 $216K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 17 $1,031.86 $18K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 184 $1,032.07 $190K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 80 $1,033.00 $83K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 40 $1,034.99 $41K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 40 $1,035.25 $41K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 47 $1,038.41 $49K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 204 $1,013.62 $207K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 135 $1,014.47 $137K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 80 $1,016.51 $81K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 6 $1,017.78 $6K
Nov 3, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 180 $1,018.01 $183K
Oct 30, 2025 MH Michael Hsing - Officer Tax withholding / forfeiture Common Stock 121,918 $1,096.63 $133.70M
Oct 30, 2025 MS Maurice Sciammas - Officer Tax withholding / forfeiture Common Stock 54,543 $1,096.63 $59.81M
Oct 30, 2025 DX Deming Xiao - Officer Tax withholding / forfeiture Common Stock 54,543 $1,096.63 $59.81M
Oct 30, 2025 ST Saria Tseng - Officer Tax withholding / forfeiture Common Stock 54,543 $1,096.63 $59.81M
Oct 30, 2025 TB Theodore Blegen - Officer Tax withholding / forfeiture Common Stock 48,298 $1,096.63 $52.97M
Oct 25, 2025 DX Deming Xiao - Officer Grant or award Common Stock 135,520 $0.00 -
Oct 25, 2025 ST Saria Tseng - Officer Grant or award Common Stock 135,520 $0.00 -
Oct 25, 2025 TB Theodore Blegen - Officer Grant or award Common Stock 87,690 $0.00 -
Oct 25, 2025 MH Michael Hsing - Officer Grant or award Common Stock 302,920 $0.00 -
Oct 24, 2025 ST Saria Tseng - Officer Open-market sale Common Stock 1,300 $1,087.62 $1.41M
Oct 15, 2025 ST Saria Tseng - Officer Open-market sale Common Stock 14,028 $1,016.18 $14.25M
Oct 16, 2025 ST Saria Tseng - Officer Open-market sale Common Stock 1,499 $1,021.26 $1.53M
Oct 16, 2025 ST Saria Tseng - Officer Open-market sale Common Stock 1,313 $1,030.81 $1.35M
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 6 $902.61 $5K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 40 $903.82 $36K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 60 $904.00 $54K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 115 $905.37 $104K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 250 $907.36 $227K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 80 $909.52 $73K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 65 $911.27 $59K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 676 $912.73 $617K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 138 $913.87 $126K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 390 $914.71 $357K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 440 $915.43 $403K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 580 $916.37 $531K
Oct 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 160 $917.17 $147K
Sep 18, 2025 ST Saria Tseng - Officer Open-market sale Common Stock 14,510 $914.45 $13.27M
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 100 $803.43 $80K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 100 $804.64 $80K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 200 $806.57 $161K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 100 $808.53 $81K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 500 $811.45 $406K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 100 $812.84 $81K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 100 $813.09 $81K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 200 $814.75 $163K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 400 $815.39 $326K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 574 $816.47 $469K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 100 $818.44 $82K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 200 $820.70 $164K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 200 $821.75 $164K
Sep 2, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 126 $822.59 $104K
Aug 27, 2025 JZ Jeff Zhou Open-market sale Common Stock 193 $870.00 $168K
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 2,603 $825.69 $2.15M
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 2,555 $826.64 $2.11M
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 3,878 $827.72 $3.21M
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 396 $828.64 $328K
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 4,101 $829.45 $3.40M
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 2,100 $830.46 $1.74M
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 1,953 $831.57 $1.62M
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 1,510 $832.57 $1.26M
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 535 $833.37 $446K
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 200 $834.92 $167K
Aug 15, 2025 MH Michael Hsing - Officer Open-market sale Common Stock 400 $836.40 $335K
Aug 13, 2025 JZ Jeff Zhou Open-market sale Common Stock 400 $850.00 $340K
Aug 12, 2025 JZ Jeff Zhou Open-market sale Common Stock 200 $830.00 $166K
Aug 11, 2025 DX Deming Xiao - Officer Gift Common Stock 945 $0.00 -
Aug 11, 2025 DX Deming Xiao - Officer Gift Common Stock 945 $0.00 -
Aug 1, 2025 TB Theodore Blegen - Officer Open-market sale Common Stock 3,000 $750.00 $2.25M
$AIP
Arteris, Inc.
Robert W. Dean II - OfficerOpen-market sale$42K
