MPWR Monolithic Power Systems, Inc.

NASDAQ
$1,316.28

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 June 30, 2026.

Managers reporting
1,295
filed a 13F this quarter
Managers holding
1,219
+126 on the quarter
Buyers
620
202 opened new
Sellers
530
76 sold out entirely
Buyer share
53.9%
of managers who traded it
Breadth
+7.8
net buyers, as a share of those trading

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Largest holders

Manager Shares % of reported
BlackRock, Inc. 5.6M 11.8%
FMR LLC 5.2M 10.9%
VANGUARD CAPITAL MANAGEMENT LLC 3.1M 6.6%
VANGUARD PORTFOLIO MANAGEMENT LLC 2.5M 5.3%
Invesco Ltd. 2.3M 4.9%
STATE STREET CORP 2.3M 4.8%
GEODE CAPITAL MANAGEMENT, LLC 1.2M 2.5%
PRICE T ROWE ASSOCIATES INC /MD/ 976.8K 2.1%
FRANKLIN RESOURCES INC 812.0K 1.7%
GOLDMAN SACHS GROUP INC 780.7K 1.6%
NORGES BANK 751.4K 1.6%
VAN ECK ASSOCIATES CORP 746.2K 1.6%
MORGAN STANLEY 727.9K 1.5%
BANK OF AMERICA CORP /DE/ 536.2K 1.1%
ROYAL BANK OF CANADA 487.2K 1.0%
FIRST TRUST ADVISORS LP 482.8K 1.0%
NORTHERN TRUST CORP 479.5K 1.0%
BARCLAYS PLC 474.1K 1.0%
Rafferty Asset Management, LLC 459.3K 1.0%
UBS Group AG 449.5K 0.9%
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 442.2K 0.9%
JPMORGAN CHASE & CO 434.9K 0.9%
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 389.0K 0.8%
Legal & General Group Plc 359.9K 0.8%
VOYA INVESTMENT MANAGEMENT LLC 340.3K 0.7%

Largest changes

Manager Action Previous Current Change
FMR LLC Increased 4.4M 5.2M +776.4K
T. Rowe Price Investment Management, Inc. Sold Out 721.6K 0 -721.6K
BlackRock, Inc. Reduced 6.1M 5.6M -482.5K
PRICE T ROWE ASSOCIATES INC /MD/ Reduced 1.3M 976.8K -286.2K
GEODE CAPITAL MANAGEMENT, LLC Reduced 1.4M 1.2M -236.8K
Anther Capital Ltd Sold Out 233.3K 0 -233.3K
VAN ECK ASSOCIATES CORP Increased 524.6K 746.2K +221.7K
GOLDMAN SACHS GROUP INC Increased 568.1K 780.7K +212.6K
BROWN ADVISORY INC Reduced 379.9K 180.4K -199.5K
WELLINGTON MANAGEMENT GROUP LLP Reduced 250.5K 72.0K -178.5K
TWO SIGMA INVESTMENTS, LP Increased 12.0K 190.5K +178.5K
JANE STREET GROUP, LLC Increased 5.1K 179.3K +174.2K
Invesco Ltd. Reduced 2.5M 2.3M -172.1K
BANK OF AMERICA CORP /DE/ Increased 382.2K 536.2K +154.1K
Rafferty Asset Management, LLC Increased 317.5K 459.3K +141.8K
MILLENNIUM MANAGEMENT LLC New 0 136.8K +136.8K
JENNISON ASSOCIATES LLC Increased 49.4K 185.5K +136.1K
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Reduced 567.8K 442.2K -125.6K
JPMORGAN CHASE & CO Reduced 554.9K 434.9K -120.0K
FRANKLIN RESOURCES INC Reduced 928.7K 812.0K -116.7K
NOMURA ASSET MANAGEMENT CO LTD Reduced 146.9K 31.7K -115.2K
FIRST TRUST ADVISORS LP Reduced 591.4K 482.8K -108.6K
FEDERATED HERMES, INC. Increased 48.6K 144.9K +96.4K
CANADA PENSION PLAN INVESTMENT BOARD Increased 53.3K 148.8K +95.4K
SUSQUEHANNA INTERNATIONAL GROUP, LLP Increased 30.0K 123.8K +93.8K

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.