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.
Sign in or subscribeLargest 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.