MPWR Monolithic Power Systems, Inc.
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.
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.
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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.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 5.6M | 11.7% |
| 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 | 2.0% |
| 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 |
| STATE STREET CORP | Increased | 2.2M | 2.3M | +93.7K |
| HRT FINANCIAL LP | New | 0 | 92.1K | +92.1K |
| UBS Group AG | Reduced | 540.4K | 449.5K | -90.9K |
| D1 Capital Partners L.P. | New | 0 | 85.1K | +85.1K |
| BARCLAYS PLC | Reduced | 555.8K | 474.1K | -81.7K |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC | Increased | 4.4K | 78.4K | +74.0K |
| MORGAN STANLEY | Increased | 656.4K | 727.9K | +71.5K |
| FIL Ltd | Increased | 154.6K | 224.6K | +69.9K |
| Qube Research & Technologies Ltd | New | 0 | 64.5K | +64.5K |
| California Public Employees Retirement System | Increased | 159.7K | 223.9K | +64.2K |
| RENAISSANCE TECHNOLOGIES LLC | New | 0 | 63.1K | +63.1K |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | Reduced | 266.7K | 206.1K | -60.5K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Reduced | 135.9K | 76.4K | -59.6K |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | 393.6K | 340.3K | -53.3K |
| AMERICAN CENTURY COMPANIES INC | Reduced | 199.7K | 147.2K | -52.5K |
| ALLIANCEBERNSTEIN L.P. | Increased | 124.6K | 177.1K | +52.5K |
| RAYMOND JAMES FINANCIAL INC | Reduced | 196.1K | 145.6K | -50.4K |
| CITADEL ADVISORS LLC | Increased | 13.5K | 63.5K | +50.0K |
| WORLDQUANT MILLENNIUM ADVISORS LLC | New | 0 | 47.1K | +47.1K |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Reduced | 79.7K | 32.7K | -47.0K |
| TD Asset Management Inc | Reduced | 72.1K | 25.4K | -46.7K |
| NOMURA HOLDINGS INC | Increased | 2.9K | 49.6K | +46.7K |
| Quadrature Capital Ltd | New | 0 | 45.0K | +45.0K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Reduced | 148.0K | 103.5K | -44.4K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 3.1M | 3.1M | +43.3K |
| LMR Partners LLP | New | 0 | 35.8K | +35.8K |
| Connor, Clark & Lunn Investment Management Ltd. | Increased | 2.0K | 37.8K | +35.8K |
| PANAGORA ASSET MANAGEMENT INC | Reduced | 42.1K | 7.1K | -35.0K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Reduced | 130.0K | 95.0K | -35.0K |
| Caisse de depot et placement du Quebec | Reduced | 85.2K | 50.2K | -34.9K |
| Allspring Global Investments Holdings, LLC | Reduced | 118.8K | 84.3K | -34.5K |
| Robeco Institutional Asset Management B.V. | Increased | 13.9K | 47.1K | +33.3K |
| HSBC HOLDINGS PLC | Increased | 158.9K | 190.8K | +31.9K |
| Man Group plc | Increased | 6.5K | 37.1K | +30.6K |
| Pacer Advisors, Inc. | Reduced | 38.8K | 8.5K | -30.3K |
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.