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Disclosery

MPWR MONOLITHIC PWR SYS INC

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Stock (common), issuer CIK 1280452

1,086 managers (1,124 13F filers) reported a position in MPWR shares at 2026-03-31, 47,264,132 shares in all. 159 filers opened a position and 104 filers sold out during the quarter.

Managers
1,086
13F filers
1,124
New
159
Added
385
Reduced
408
Sold out
104
Shares held by filers
47,264,132

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Rakuten Group, Inc.group of 2 filers holding14,959$15M+1,594Timeline
WESTWOOD HOLDINGS GROUP INCin group WESTWOOD HOLDINGS GROUP INC13,713$15M0.11%-3,66513F-HRTimelineGroup
Harvest Fund Management Co., Ltdin group Harvest Fund Management Co., …13,685$15M0.64%+13913F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC13,512$14.8M0.01%+2,28313F-HRTimelineGroup
Stephens Investment Management Group LLCgroup of 2 filers holding13,501$14.8M+1,023Timeline
MetLife Investment Management, LLCin group MetLife Investment Management…13,432$14.7M0.07%-26013F-HRTimelineGroup
1832 Asset Management L.P.13,400$14.7M0.02%-2,54213F-HRTimeline
Czech National Bank13,266$14.5M0.1%+63413F-HRTimeline
Silvant Capital Management LLC13,106$14.3M0.5%+21113F-HRTimeline
Lombard Odier Asset Management (Europe)…13,083$14.3M0.79%-56713F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM13,018$14.2M0.08%-11013F-HRTimeline
XPONANCE LLC12,887$14.1M0.1%+1,01713F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC12,724$13.9M0.81%+2,61913F-HRTimelineGroup
STOREBRAND ASSET MANAGEMENT AS12,274$13.4M0.04%+82913F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\12,202$13.3M0.02%+15713F-HRTimelineGroup
Nicholas Investment Partners, LP12,029$13.2M0.95%+11713F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP12,018$13.1M0.01%new13F-HRTimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC12,009$13.1M0.05%+33513F-HRTimelineGroup
Bridgewater Associates, LP11,942$13.1M0.06%+9,07113F-HRTimeline
Cornerstone Advisors, LLC11,907$13M0.48%-2,78513F-HRTimeline
Lansforsakringar Fondforvaltning AB (pu…11,839$12.9M0.07%+14013F-HRTimeline
CARDEROCK CAPITAL MANAGEMENT INC11,665$12.8M3.15%+19613F-HRTimeline
AustralianSuper Pty Ltd11,496$12.6M0.07%new13F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…11,346$12.4M0.06%+20313F-HRTimeline
COMMERCE BANKin group COMMERCE BANK11,039$12.1M0.06%+8,33413F-HRTimelineGroup
AMALGAMATED BANK10,766$11.8M0.09%-4913F-HRTimeline
Generate Investment Management Ltd10,640$11.6M0.57%+30913F-HRTimeline
MACQUARIE GROUP LTDin group MACQUARIE GROUP LTD10,489$11.5M0.07%-19,06713F-HRTimelineGroup
NorthCrest Asset Manangement, LLC10,188$11.4M0.35%-7913F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS10,353$11.3M0.05%+2,02113F-HRTimeline
Retirement Systems of Alabama10,343$11.3M0.04%+15113F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV10,043$11M0.02%+1,10813F-HRTimeline
USS Investment Management Ltd9,997$10.9M0.04%+36813F-HRTimeline
SILVERCREST ASSET MANAGEMENT GROUP LLC9,847$10.8M0.08%-10,36213F-HRTimeline
GF FUND MANAGEMENT CO. LTD.9,817$10.7M0.18%-28813F-HRTimeline
Titan Investment Solutions Ltdin group Titan Investment Solutions Ltd9,710$10.6M1.36%013F-HRTimelineGroup
IFM Investors Pty Ltd9,569$10.5M0.09%new13F-HRTimeline
Stratos Wealth Partners, LTD.group of 2 filers holding9,444$10.3M+255Timeline
Stanley-Laman Group, Ltd.9,438$10.3M1.27%+20113F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.9,422$10.3M0.16%-1,16913F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Federation des caisses Desjardins du Qu…9,326$10.2M0.04%+2,78913F-HRTimeline
Larson Financial Group LLC9,197$10.1M0.32%-78813F-HRTimeline
BOKF, NAin group BOKF, NA9,105$9.95M0.15%-18313F-HRTimelineGroup
Eurizon Capital SGR S.p.A.8,961$9.76M0.03%-1,06813F-HRTimeline
SIH Partners, LLLPin group SIH Partners, LLLP8,916$9.75M0.3%new13F-HRTimelineGroup
Public Sector Pension Investment Board8,811$9.63M0.03%+1,71613F-HRTimeline
BURNEY CO/8,763$9.58M0.3%-5,20213F-HRTimeline
UniSuper Management Pty Ltd8,763$9.58M0.06%-69213F-HRTimeline
Wealthfront Advisers LLC8,731$9.55M0.02%+1,05813F-HRTimeline
BENJAMIN EDWARDS INCin group BENJAMIN EDWARDS INC8,722$9.54M0.09%+95013F-HRTimelineGroup
Vantage Investment Partners, LLC8,715$9.53M0.66%-1,38213F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.group of 2 filers holding8,523$9.32M-200Timeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC8,414$9.2M0.05%+2,72613F-HRTimeline
PensionDanmark Pensionsforsikringsaktie…7,960$8.7M0.08%-29013F-HRTimeline
CIBC WORLD MARKET INC.7,937$8.68M0.02%+7,07713F-HRTimeline
MACKENZIE FINANCIAL CORP7,736$8.46M0.01%+38913F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…7,724$8.45M0.1%+74113F-HRTimelineGroup
Bank Julius Baer & Co. Ltd, Zurich8,286$8.42M0.03%-93513F-HRTimeline
Dakota Wealth Management7,658$8.37M0.18%+1,44013F-HR/ATimeline
CCM INVESTMENT ADVISERS LLC7,586$8.29M0.79%+52513F-HRTimeline
Utah Retirement Systems7,525$8.23M0.08%-11413F-HRTimeline
Midwest Trust Co7,418$8.11M0.1%+21213F-HRTimeline
Polar Capital Holdings Plcin group Polar Capital Holdings Plc7,380$8.07M0.04%-1,80013F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson7,374$8.06M<0.01%+12813F-HR/ATimelineGroup
DZ BANK AG Deutsche Zentral Genossensch…in group DZ BANK AG Deutsche Zentral G…7,343$8.03M0.01%-9,47713F-HRTimelineGroup
Atlantic Union Bankshares Corpin group Atlantic Union Bankshares Corp7,339$8.02M0.15%013F-HRTimelineGroup
New York Life Investment Management LLCin group New York Life Investment Mana…7,249$7.93M0.07%+29813F-HRTimelineGroup
Police & Firemen's Retirement System of…7,111$7.77M0.07%+1413F-HRTimeline
LEVEL FOUR ADVISORY SERVICES, LLCin group LEVEL FOUR ADVISORY SERVICES,…7,075$7.74M0.25%-22713F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP6,732$7.36M0.01%new13F-HRTimelineGroup
Ethic Inc.6,625$7.24M0.11%+3313F-HRTimeline
BRITISH COLUMBIA INVESTMENT MANAGEMENT …6,602$7.22M0.04%-1,88013F-HRTimeline
SATURNA CAPITAL CORP6,563$7.18M0.1%-21813F-HRTimeline
ARGENT CAPITAL MANAGEMENT LLC6,521$7.13M0.22%+2,31213F-HRTimeline
Man Group plcin group Man Group plc6,508$7.12M0.01%-20,42813F-HRTimelineGroup
QRG CAPITAL MANAGEMENT, INC.6,493$7.1M0.07%-38213F-HRTimeline
FIRST AMERICAN TRUST, FSB6,429$7.03M0.47%+4613F-HRTimeline
FIRST FOUNDATION ADVISORSin group FIRST FOUNDATION ADVISORS6,356$6.95M0.28%-2313F-HRTimelineGroup
State of Alaska, Department of Revenue6,322$6.91M0.07%+1,15513F-HRTimeline
AMERICAN CAPITAL MANAGEMENT INC6,320$6.91M0.37%-16813F-HRTimeline
Sumitomo Mitsui DS Asset Management Com…in group SUMITOMO MITSUI FINANCIAL GRO…6,310$6.9M0.06%+14213F-HRTimelineGroup
BANK OF NOVA SCOTIAin group BANK OF NOVA SCOTIA6,275$6.86M0.01%-34,19913F-HRTimelineGroup
CREDIT AGRICOLE S Ain group CREDIT AGRICOLE S A6,212$6.79M0.02%-16,72613F-HRTimelineGroup
QUEST INVESTMENT MANAGEMENT LLC6,061$6.63M0.77%-2,45413F-HRTimeline
Aware Super Pty Ltd as trustee of Aware…5,996$6.56M0.1%13F-HRTimeline
PROFUND ADVISORS LLC5,905$6.46M0.24%-1,18613F-HRTimeline
Louisiana State Employees Retirement Sy…5,700$6.23M0.11%+10013F-HRTimeline
Knollwood Investment Advisory, LLC5,685$6.22M0.63%013F-HRTimeline
FIRST NATIONAL BANK OF OMAHAgroup of 2 filers holding5,662$6.19M-439Timeline
SHELTON CAPITAL MANAGEMENT5,646$6.17M0.14%-8313F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND5,591$6.11M0.08%+11613F-HRTimeline
Davidson Capital Management Inc.5,412$5.92M1.07%+80313F-HRTimeline
MITCHELL CAPITAL MANAGEMENT CO5,385$5.89M1.08%-16213F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP5,379$5.88M0.01%+4413F-HRTimelineGroup
Ilmarinen Mutual Pension Insurance Co5,345$5.84M0.05%new13F-HRTimeline
Janney Montgomery Scott LLC5,256$5.75M0.01%+33113F-HRTimeline
Steward Partners Investment Advisory, L…5,255$5.74M0.03%+26013F-HRTimeline
Empirical Financial Services, LLC d.b.a…5,235$5.72M0.1%+53613F-HRTimeline
NewEdge Advisors, LLC5,197$5.68M0.02%-4,94713F-HR/ATimeline
ABN AMRO INVESTMENT SOLUTIONSgroup of 2 filers holding5,204$5.68M+2,973Timeline
Investment Management Corp of Ontario5,158$5.64M0.07%+96313F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC5,083$5.56M0.01%+59613F-HRTimelineGroup
ALLSTATE CORPin group ALLSTATE CORP5,064$5.54M0.06%+1,50813F-HRTimelineGroup
Bahl & Gaynor LLC5,042$5.51M0.03%013F-HRTimeline
Rathbones Group PLC4,929$5.39M0.02%-60613F-HR/ATimeline
YOUSIF CAPITAL MANAGEMENT, LLC4,898$5.36M0.06%-6313F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …5,081$5.32M<0.01%+17213F-HRTimelineGroup
Parcion Private Wealth LLC4,804$5.25M0.33%-2613F-HRTimeline
Calamos Advisors LLCgroup of 2 filers holding4,765$5.21M+1,395Timeline
AZZAD ASSET MANAGEMENT INC /ADV4,665$5.1M0.52%-14913F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC4,638$5.07M0.01%+1,44913F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd4,629$5.06M0.1%new13F-HRTimeline
Norinchukin Bank, Thein group Norinchukin Bank, The4,562$4.99M0.06%+26613F-HRTimelineGroup
BOSTON FAMILY OFFICE LLC4,544$4.97M0.33%-10913F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC4,536$4.96M0.01%-1,19113F-HRTimeline
Trilogy Capital Inc.4,503$4.92M0.22%+28913F-HRTimeline
Arosa Capital Management LP4,500$4.92M3.2%new13F-HRTimeline
KP Management LLC4,500$4.92M1.41%-1,00013F-HRTimeline
ASR Vermogensbeheer N.V.4,472$4.89M0.06%+8313F-HRTimeline
HB Wealth Management, LLC4,395$4.81M0.03%-1,66913F-HRTimeline
CAPITOLIS LIQUID GLOBAL MARKETS LLCin group CAPITOLIS LIQUID GLOBAL MARKE…4,391$4.8M0.03%13F-HRTimelineGroup
Indivisible Partners4,378$4.79M0.42%new13F-HRTimeline
NFJ INVESTMENT GROUP, LLC4,375$4.78M0.18%013F-HRTimeline
Avanza Fonder AB4,340$4.75M0.13%-7313F-HRTimeline
BI Asset Management Fondsmaeglerselskab…in group BI Asset Management Fondsmaeg…4,335$4.74M0.05%-1,78713F-HRTimelineGroup
Summit Trail Advisors, LLC4,325$4.73M0.07%+49113F-HRTimeline
OMERS ADMINISTRATION Corp4,249$4.65M0.03%+2,23413F-HRTimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC4,210$4.6M0.01%-19,57313F-HRTimelineGroup
KORNITZER CAPITAL MANAGEMENT INC /KS4,177$4.57M0.1%-1,05013F-HRTimeline
MML INVESTORS SERVICES, LLC4,164$4.55M0.01%-1,03313F-HRTimeline
Global X Japan Co., Ltd.4,150$4.54M0.23%+14413F-HRTimeline
Connective Capital Management, LLC4,105$4.49M3.71%new13F-HRTimeline
Private Advisor Group, LLC4,077$4.46M0.02%-53013F-HRTimeline
NORTHWESTERN MUTUAL INVESTMENT MANAGEME…group of 2 filers holding4,041$4.42M+205Timeline
4D Advisors, LLC4,000$4.37M2.77%013F-HRTimeline
BRASADA CAPITAL MANAGEMENT, LP3,704$4.37M0.8%-23513F-HRTimeline
Groupe la Francaisein group Groupe la Francaise3,992$4.36M0.06%-1,76613F-HRTimelineGroup
Hennion & Walsh Asset Management, Inc.3,914$4.28M0.14%+6113F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…3,806$4.16M0.03%013F-HRTimeline
HighTower Advisors, LLC3,772$4.12M<0.01%-62213F-HRTimeline
&PARTNERS3,765$4.09M0.02%-57613F-HRTimeline
Gulf International Bank (UK) Ltd3,714$4.06M0.09%+1,26813F-HRTimeline
Torray Investment Partners LLC3,707$4.05M0.59%-54213F-HRTimeline
Triasima Portfolio Management inc.3,707$4.05M0.61%+1013F-HRTimeline
Integrated Wealth Concepts LLC3,686$4.03M0.03%new13F-HRTimeline
Eurizon SLJ Capital Ltd3,984$3.99M1.9%-1,68413F-HRTimeline
GUARDIAN CAPITAL LPin group GUARDIAN CAPITAL LP3,615$3.95M0.1%+3,03413F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,614$3.95M0.1%-5,81613F-HRTimelineGroup
GREENUP STREET WEALTH MANAGEMENT LLC3,605$3.94M0.55%-1,16413F-HRTimeline
World Investment Advisors3,576$3.91M0.06%-21113F-HRTimeline
MV CAPITAL MANAGEMENT, INC.3,567$3.9M0.38%-10413F-HRTimeline
Oak Harvest Investment Services3,553$3.88M0.41%+1213F-HRTimeline
Sterling Capital Management LLC3,485$3.81M0.07%+3,03513F-HRTimeline
Thrive Capital Management, LLC3,439$3.76M0.82%-30113F-HRTimeline
Illinois Municipal Retirement Fund3,428$3.75M0.05%new13F-HRTimeline
Cambridge Investment Research Advisors,…3,416$3.73M0.01%+30013F-HRTimeline
INTRUST BANK NA3,371$3.69M0.3%-2213F-HRTimeline
Brooklyn Investment Group3,369$3.68M0.12%+35913F-HRTimeline
EVOLVE PRIVATE WEALTH, LLC3,353$3.67M0.2%+3913F-HRTimeline
Leelyn Smith, LLC3,345$3.66M0.51%-7413F-HRTimeline
PFG Advisors3,344$3.66M0.18%-18613F-HRTimeline
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC3,343$3.65M0.03%-74413F-HRTimelineGroup
COLDSTREAM CAPITAL MANAGEMENT INC3,342$3.65M0.05%-1,52513F-HRTimeline
PINKERTON WEALTH, LLC3,982$3.61M0.33%+31613F-HRTimeline
MIZUHO FINANCIAL GROUP INCgroup of 2 filers holding3,300$3.61M-188Timeline
Harfst & Associates, Inc.3,288$3.59M0.64%-3013F-HRTimeline
Values First Advisors, Inc.3,278$3.58M1.87%+113F-HRTimeline
BLB&B Advisors, LLC3,257$3.56M0.15%-6,02613F-HRTimeline
Focus Partners Wealthin group Focus Partners Wealth3,099$3.54M<0.01%-10,75313F-HRTimelineGroup
Baker Avenue Asset Management, LP3,215$3.52M0.08%+3313F-HRTimeline
Modern Wealth Management, LLC3,105$3.48M0.06%-7113F-HRTimeline
Peak Retirement Planning, Inc.3,162$3.46M0.69%+12113F-HRTimeline
Paragon Advisors, LLC3,156$3.45M0.93%-14013F-HRTimeline
Advisors Asset Management, Inc.3,141$3.43M0.06%+3113F-HRTimeline
IMC-Chicago, LLC3,131$3.42M0.05%new13F-HRTimeline
Merit Financial Group, LLC3,098$3.39M0.03%+34113F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…13,124$3.28M0.01%+9,39813F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…2,998$3.28M0.01%+20913F-HRTimelineGroup
FIDEURAM - INTESA SANPAOLO PRIVATE BANK…2,991$3.27M0.11%-19313F-HRTimeline
Left Brain Wealth Management, LLC2,973$3.25M1.28%+2,14113F-HRTimeline
MIRABELLA FINANCIAL SERVICES LLP2,955$3.23M0.31%+2,52813F-HRTimeline
Havemeyer Place LP2,953$3.23M0.37%new13F-HRTimeline
WASATCH ADVISORS LP2,942$3.22M0.02%-98913F-HRTimeline
GKV Capital Management Co., Inc.2,940$3.21M1.21%+3013F-HR/ATimeline
Equitable Holdings, Inc.in group Equitable Holdings, Inc.3,060$3.19M0.02%+2,20613F-HRTimelineGroup
E Fund Management Co., Ltd.2,912$3.18M0.09%13F-HRTimeline
Sequoia Financial Advisors, LLC2,859$3.13M0.02%+17113F-HRTimeline
PEAPACK GLADSTONE FINANCIAL CORP2,823$3.09M0.04%+413F-HRTimeline
M&T Bank Corpin group M&T Bank Corp2,806$3.07M0.01%+5413F-HR/ATimelineGroup
HARTFORD INVESTMENT MANAGEMENT CO2,774$3.03M0.1%+813F-HRTimeline
Stiles Financial Services Inc2,769$3.03M0.93%-813F-HRTimeline
Investors Towarzystwo Funduszy Inwestyc…2,723$2.98M1.23%-73513F-HRTimeline
PRUDENTIAL PLCin group PRUDENTIAL PLC2,681$2.93M0.02%+46413F-HRTimelineGroup
Fideuram Asset Management (Ireland) dac2,826$2.93M0.37%-1,56913F-HRTimeline
Ketron Financial2,616$2.86M1.02%013F-HRTimeline
Allworth Financial LP2,610$2.85M0.01%+2,29513F-HRTimeline
Deeter Investments LLP2,500$2.73M0.48%new13F-HRTimeline
Diversify Advisory Services, LLCgroup of 2 filers holding1,761$2.69M+20Timeline
PREVAIL INNOVATIVE WEALTH ADVISORS, LLC2,445$2.67M0.45%new13F-HRTimeline
Ameritas Investment Partners, Inc.group of 2 filers holding2,425$2.65M-3Timeline