MPWR Monolithic Power Systems, Inc.

NASDAQ
$1,425.98

Monolithic Power Systems, Inc. (MPWR) Institutional Ownership

What the institutions did with MPWR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.

Managers compared
10
filed both this quarter and last
Managers holding
9
+0 on the quarter
Buyers
3
1 opened new
Sellers
6
1 sold out entirely
Buyer share
33.3%
of managers who traded it
Breadth
-33.3
net buyers, as a share of those trading

Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

Sign in or subscribe

Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
PARK NATIONAL CORP /OH/ 16.1K 86.5%
Versant Capital Management, Inc 693 3.7%
Central Pacific Bank - Trust Division 659 3.5%
CX Institutional 308 1.7%
ARGENT CAPITAL MANAGEMENT LLC 271 1.5%
MassMutual Private Wealth & Trust, FSB 230 1.2%
FERGUSON WELLMAN CAPITAL MANAGEMENT, INC 190 1.0%
EASTERN BANK 108 0.6%
BURKETT FINANCIAL SERVICES, LLC 52 0.3%

Largest changes

Manager Action Previous Current Change
PARK NATIONAL CORP /OH/ Reduced 21.7K 16.1K -5.6K
ARGENT CAPITAL MANAGEMENT LLC Reduced 3.5K 271 -3.2K
Silverleafe Capital Partners, LLC Sold Out 625 0 -625
BURKETT FINANCIAL SERVICES, LLC New 0 52 +52
Central Pacific Bank - Trust Division Reduced 696 659 -37
CX Institutional Reduced 343 308 -35
Versant Capital Management, Inc Increased 678 693 +15
MassMutual Private Wealth & Trust, FSB Reduced 243 230 -13
EASTERN BANK Increased 100 108 +8

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.