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Disclosery

MPWR MONOLITHIC PWR SYS INC

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Stock (common), issuer CIK 1280452

844 managers (867 13F filers) reported a position in MPWR shares at 2025-03-31, 46,661,921 shares in all. 113 filers opened a position and 110 filers sold out during the quarter.

Managers
844
13F filers
867
New
113
Added
331
Reduced
310
Sold out
110
Shares held by filers
46,661,921

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 2025

Filers in the available 13F reports with a share position at 2025-03-31, 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
WealthCollab, LLC5$2.9K<0.01%+213F-HRTimeline
WealthTrak Capital Management LLC5$2.9K<0.01%+113F-HRTimeline
Kozak & Associates, Inc.4$2.17K<0.01%013F-HRTimeline
Colonial Trust Co / SCin group Colonial Trust Advisors4$2.06K<0.01%-2313F-HRTimelineGroup
LANARK FINANCIAL, INC.5$2K<0.01%new13F-HRTimeline
Avion Wealth5$2K<0.01%013F-HRTimeline
Capital Advisors, Ltd. LLC3$2K<0.01%+113F-HRTimeline
Hughes Financial Services, LLC3$1.74K<0.01%new13F-HRTimeline
ALBION FINANCIAL GROUP /UT3$1.74K<0.01%013F-HRTimeline
LONGFELLOW INVESTMENT MANAGEMENT CO LLC3$1.74K<0.01%013F-HRTimeline
CAROLINAS WEALTH CONSULTING LLC3$1.74K<0.01%+213F-HRTimeline
Hexagon Capital Partners LLC3$1.74K<0.01%-313F-HRTimeline
Addison Advisors LLC3$1.74K<0.01%new13F-HRTimeline
Crews Bank & Trust3$1.74K<0.01%013F-HRTimeline
Principia Wealth Advisory, LLC3$1.69K<0.01%+213F-HRTimeline
Cranbrook Wealth Management, LLC2$1.28K<0.01%013F-HRTimeline
BROWN, LISLE/CUMMINGS, INC.2$1.16K<0.01%new13F-HRTimeline
ST GERMAIN D J CO INCin group ST GERMAIN D J CO INC2$1.16K<0.01%013F-HRTimelineGroup
Riggs Asset Managment Co. Inc.2$1.16K<0.01%new13F-HRTimeline
Key Financial Inc2$1.16K<0.01%new13F-HRTimeline
TFC Financial Management, Inc.2$1.16K<0.01%013F-HRTimeline
Private Wealth Asset Management, LLC2$1.16K<0.01%13F-HRTimeline
Trifecta Capital Advisors, LLC2$1.16K<0.01%013F-HRTimeline
DiNuzzo Private Wealth, Inc.2$1.16K<0.01%013F-HRTimeline
Dogwood Wealth Management LLC2$1.16K<0.01%new13F-HRTimeline
PEAK6 LLCin group PEAK6 LLC2$913<0.01%-93513F-HRTimelineGroup
Bay Harbor Wealth Management, LLC1$581<0.01%new13F-HRTimeline
WestEnd Advisors, LLC1$580<0.01%new13F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC1$580<0.01%-113F-HRTimelineGroup
RAFFA WEALTH MANAGEMENT, LLC1$580<0.01%-113F-HRTimeline
HORIZON FINANCIAL SERVICES, LLC1$580<0.01%-113F-HR/ATimeline
First Command Advisory Services, Inc.1$580<0.01%new13F-HRTimeline
WEST PACES ADVISORS INC.1$580<0.01%013F-HRTimeline
Bare Financial Services, Inc1$580<0.01%new13F-HRTimeline
American Capital Advisory, LLC1$580<0.01%new13F-HRTimeline
Parkworth Wealth Management, Inc.1$580<0.01%013F-HRTimeline
MPWM ADVISORY SOLUTIONS, LLC1$580<0.01%013F-HRTimeline
CHESAPEAKE ASSET MANAGEMENT LLC1$579<0.01%013F-HRTimeline
West Oak Capital, LLC55$3190.01%013F-HRTimeline
Quest 10 Wealth Builders, Inc.0$273<0.01%new13F-HRTimelineAmount filed as zero, left out of ratios.
OGOREK ANTHONY JOSEPH /NY/ /ADV0$00%new13F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0-26713F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.
CBIZ Investment Advisory Services, LLC0$00%new13F-HR/ATimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.
Erste Asset Management GmbHin group Erste Asset Management GmbH0$00%013F-HRTimelineGroupValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.