Stock Ownership/MPWR

MONOLITHIC PWR SYS INC (MPWR): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in MPWR · Information Technology. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
38
13F filers
Aggregate Value
$1.3B
Across holders
Last Price
$1285.03
2026-08-24
Sector
Information Technology
GICS
Quarterly fund activity29 increased9 reduced2 exited
Full exits: Lighthouse Investment Partners, LLC, Holocene Advisors, LP
Institutional Holders of MPWR
↗
38 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund191K$263.3M19.7%0.2%Added+$255.1MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund137K$189.2M14.1%0.1%Added+$186.4MQ2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
Hedge Fund96K$133.2M10.0%0.2%Added+$31.4MQ2 2026
D1 Capital Partners L.P.
CIK 0001747057
Hedge Fund85K$117.6M8.8%0.3%Added—Q2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund65K$89.2M6.7%0.1%Added+$88.1MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund63K$87.8M6.6%0.0%Added$-13.7MQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund63K$87.2M6.5%0.1%Added—Q2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund53K$73.3M5.5%0.1%Added+$73.0MQ2 2026
Man Group plc
CIK 0001637460
Hedge Fund37K$51.3M3.8%0.1%Added+$45.2MQ2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLC
CIK 0001556921
Hedge Fund30K$41.4M3.1%0.2%Added—Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$263.3M· 19.7% of total· 0.2% port· 191K sh· +$255.1M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$189.2M· 14.1% of total· 0.1% port· 137K sh· +$186.4M QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Added
Hedge Fund
$133.2M· 10.0% of total· 0.2% port· 96K sh· +$31.4M QoQ· Q2 2026
D1 Capital Partners L.P.Added
Hedge Fund
$117.6M· 8.8% of total· 0.3% port· 85K sh· — QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$89.2M· 6.7% of total· 0.1% port· 65K sh· +$88.1M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$87.8M· 6.6% of total· 0.0% port· 63K sh· $-13.7M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCAdded
Hedge Fund
$87.2M· 6.5% of total· 0.1% port· 63K sh· — QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$73.3M· 5.5% of total· 0.1% port· 53K sh· +$73.0M QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$51.3M· 3.8% of total· 0.1% port· 37K sh· +$45.2M QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCAdded
Hedge Fund
$41.4M· 3.1% of total· 0.2% port· 30K sh· — QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$33.8M· 2.5% of total· 0.0% port· 25K sh· +$33.7M QoQ· Q2 2026
Gotham Asset Management, LLCAdded
Hedge Fund
$33.0M· 2.5% of total· 0.1% port· 24K sh· +$2.0M QoQ· Q2 2026
FRED ALGER MANAGEMENT, LLCAdded
Hedge Fund
$23.0M· 1.7% of total· 0.1% port· 17K sh· +$21.4M QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDReduced
Hedge Fund
$21.1M· 1.6% of total· 0.1% port· 15K sh· $-4.6M QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$20.2M· 1.5% of total· 0.1% port· 15K sh· +$17.6M QoQ· Q2 2026
Clearbridge Investments, LLCReduced
Hedge Fund
$16.9M· 1.3% of total· 0.0% port· 12K sh· $-6.2M QoQ· Q2 2026
MOORE CAPITAL MANAGEMENT, LPAdded
Hedge Fund
$8.6M· 0.6% of total· 0.1% port· 6K sh· — QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$8.0M· 0.6% of total· 0.1% port· 6K sh· +$7.5M QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$4.4M· 0.3% of total· 0.0% port· 3K sh· — QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$4.3M· 0.3% of total· 0.0% port· 3K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$4.3M· 0.3% of total· 0.0% port· 3K sh· $-10.7M QoQ· Q2 2026
Bridgewater Associates, LPReduced
Hedge Fund
$4.3M· 0.3% of total· 0.0% port· 3K sh· $-12.2M QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$4.2M· 0.3% of total· 0.0% port· 3K sh· +$2.5M QoQ· Q2 2026
Verition Fund Management LLCAdded
Hedge Fund
$3.5M· 0.3% of total· 0.0% port· 3K sh· +$3.1M QoQ· Q2 2026
Hudson Bay Capital Management LPAdded
Hedge Fund
$2.7M· 0.2% of total· 0.0% port· 2K sh· — QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$2.6M· 0.2% of total· 0.0% port· 2K sh· $-16.1M QoQ· Q2 2026
PineBridge Investments, L.P.Reduced
Hedge Fund
$1.9M· 0.1% of total· 0.0% port· 2K sh· $-2.2M QoQ· Q3 2025
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$1.5M· 0.1% of total· 0.0% port· 1K sh· +$442K QoQ· Q2 2026
Grantham, Mayo, Van Otterloo & Co. LLCReduced
Institutional Manager
$1.5M· 0.1% of total· 0.0% port· 1K sh· $-618K QoQ· Q2 2026
TCW GROUP INCAdded
Hedge Fund
$1.1M· 0.1% of total· 0.0% port· 815 sh· +$82K QoQ· Q2 2026
Walleye Capital LLCAdded
Hedge Fund
$887K· 0.1% of total· 0.0% port· 642 sh· $-633K QoQ· Q2 2026
MAVERICK CAPITAL LTDAdded
Hedge Fund
$820K· 0.1% of total· 0.0% port· 593 sh· — QoQ· Q2 2026
CAXTON ASSOCIATES LLPAdded
Hedge Fund
$553K· 0.0% of total· 0.0% port· 400 sh· — QoQ· Q2 2026
Bridgewater Advisors Inc.Added
Hedge Fund
$330K· 0.0% of total· 0.0% port· 252 sh· +$7K QoQ· Q2 2026
Fisher Asset Management, LLCReduced
Institutional Manager
$246K· 0.0% of total· 0.0% port· 177 sh· $-49K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$24K· 0.0% of total· 0.0% port· 18 sh· — QoQ· Q2 2026
Ancora Advisors, LLCReduced
Hedge Fund
$19K· 0.0% of total· 0.0% port· 14 sh· $-28K QoQ· Q2 2026
BAILLIE GIFFORD & COAdded
Institutional Manager
$7K· 0.0% of total· 0.0% port· 5 sh· — QoQ· Q2 2026
1–10 of 38
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