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Disclosery

MPWR MONOLITHIC PWR SYS INC

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Stock (common), issuer CIK 1280452

Filings received so far for Q3 2026: 40 13F filers report a position in MPWR shares at 2026-09-30. The quarter is not complete: its 13F deadline is 2026-11-14, and the counts grow as filings arrive.

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, Q3 2026

Filers in the available 13F reports with a share position at 2026-09-30, 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
ZEVENBERGEN CAPITAL INVESTMENTS LLC74,736$101M2.3%-3,86813F-HRTimeline
CONGRESS ASSET MANAGEMENT CO74,381$100M0.65%-6,04413F-HRTimeline
PARK NATIONAL CORP /OH/16,082$21.7M0.59%-5,58113F-HRTimeline
Mn Services Vermogensbeheer B.V.13,653$18.4M0.14%013F-HRTimeline
SAPIENT CAPITAL LLC6,457$8.71M0.12%-15,51713F-HRTimeline
GAMMA Investing LLC2,337$3.15M0.11%+23013F-HRTimeline
Wedmont Private Capital2,006$2.75M0.07%+81213F-HRTimeline
Westwind Capital1,324$1.78M0.42%new13F-HRTimeline
MOODY NATIONAL BANK TRUST DIVISIONin group MOODY NATIONAL BANK TRUST DIV…1,168$1.57M0.13%-17613F-HRTimelineGroup
Green Alpha Advisors, LLC793$1.07M0.72%+513F-HRTimeline
Farther Finance Advisors, LLC779$1.05M0.01%-2613F-HRTimeline
Valeo Financial Advisors, LLC702$946K0.02%+9913F-HRTimeline
Versant Capital Management, Inc693$934K0.08%+1513F-HRTimeline
Central Pacific Bank - Trust Division659$888K0.09%-3713F-HRTimeline
Whalen Wealth Management Inc.650$876K0.37%+6013F-HRTimeline
Legacy Wealth Asset Management, LLC456$614K0.13%-2013F-HRTimeline
AMERICAN NATIONAL BANK & TRUST380$512K0.05%-1913F-HRTimeline
CoreCap Advisors, LLC354$478K0.01%-33813F-HRTimeline
CX Institutional308$414K0.01%-3513F-HRTimeline
ARGENT CAPITAL MANAGEMENT LLC271$365K0.01%-3,23613F-HRTimeline
MassMutual Private Wealth & Trust, FSB230$310K0.01%-1313F-HRTimeline
Graves Light Lenhart Wealth, Inc.206$277K0.03%013F-HRTimeline
Balefire, LLC199$268K0.04%+1013F-HRTimeline
FERGUSON WELLMAN CAPITAL MANAGEMENT, INC190$256K<0.01%013F-HRTimeline
Avidian Wealth Enterprises, LLC185$250K0.01%+813F-HRTimeline
Venture Visionary Partners LLC173$234K0.01%new13F-HRTimeline
Everhart Financial Group, Inc.155$209K0.01%-113F-HRTimeline
EASTERN BANK108$146K<0.01%+813F-HRTimeline
BURKETT FINANCIAL SERVICES, LLC52$70.1K0.02%new13F-HRTimeline
GK Wealth Management LLC32$43.1K0.02%new13F-HRTimeline
ARMSTRONG ADVISORY GROUP, INC20$27.2K<0.01%+413F-HRTimeline
ELEVATION WEALTH PARTNERS, LLC16$21.6K0.01%+113F-HRTimeline
Marquette Asset Management, LLC10$13.5K<0.01%013F-HRTimeline
Retirement Wealth Solutions LLC5$6.74K<0.01%+313F-HRTimeline
Grove Bank & Trust3$4.04K<0.01%013F-HRTimeline
TOTH FINANCIAL ADVISORY CORP2$2.69K<0.01%new13F-HRTimeline
GILPIN WEALTH MANAGEMENT, LLC2$2.69K<0.01%new13F-HRTimeline
Wealth Enhancement Trust Services, Inc.2$2.69K<0.01%-313F-HRTimeline
Trust Co1$1.35K<0.01%013F-HRTimeline
Davis Capital Management1$1.35K<0.01%013F-HRTimeline