Monolithic Power SystemsMPWR
13F holders, Q1 2026 (March 31)1,122holders +60
159new positions
100sold out
8famous investors
$1090.90avg. 13F price*
At the end of Q1 2026, 1,122 institutions reported holding Monolithic Power Systems Inc. (MPWR) in their 13F filings, up 60 from Q4 2025. 159 opened new positions and 100 sold out. The largest holders were BlackRock, Inc. ($6.6B), FMR LLC ($4.8B) and Vanguard Capital Management LLC ($3.4B). 8 famous investors held it, including Ron Baron (0.2% of Baron Capital (BAMCO)'s portfolio), Joel Greenblatt (0.1% of Gotham Asset Management's portfolio) and Ray Dalio (0.1% of Bridgewater Associates's portfolio).
- Company
- Monolithic Power Systems Inc.
- Sector
- Technology
- CUSIP
- 609839105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 159 | $243.9M |
| Exits | 100 | $246.7M |
All 13F filers, Q4 2025 → Q1 2026: 2,362,829 shares bought and 3,474,657 shares sold, net −1,111,828 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 1,122 holders
| BlackRock, Inc. | 0.12% | Add +1.9% | 6,072,467 | $6.6B |
| FMR LLC | 0.25% | Add +10.7% | 4,400,831 | $4.8B |
| Vanguard Capital Management LLC | 0.08% | — | 3,083,449 | $3.4B |
| Vanguard Portfolio Management LLC | 0.14% | — | 2,516,492 | $2.8B |
| Invesco Ltd. | 0.27% | Add +0.2% | 2,515,987 | $2.8B |
| State Street Corp. | 0.08% | Add +0.4% | 2,188,454 | $2.4B |
| Geode Capital Management, LLC | 0.10% | Add +3.6% | 1,432,066 | $1.6B |
| T. Rowe Price Associates Inc. | 0.16% | Reduce -25.3% | 1,262,954 | $1.4B |
| Franklin Resources Inc. | 0.25% | Reduce -11.5% | 928,671 | $1.0B |
| T. Rowe Price Investment Management, Inc. | 0.54% | Reduce -0.4% | 721,622 | $789.0M |
| Morgan Stanley | 0.04% | Add +1.1% | 656,367 | $717.6M |
| First Trust Advisors LP | 0.46% | Reduce -15.7% | 591,353 | $646.6M |
| Goldman Sachs Group Inc. | 0.08% | Reduce -4.3% | 568,064 | $621.1M |
| Massachusetts Financial Services Co. | 0.21% | Reduce -0.5% | 567,769 | $620.7M |
| Barclays PLC | 0.22% | Reduce -8.1% | 555,808 | $607.7M |
| UBS Group AG | 0.10% | Add +23.1% | 540,413 | $590.9M |
| Van Eck Associates Corp. | 0.43% | Add +4.4% | 524,571 | $573.5M |
| JPMorgan Chase & Co. | 0.04% | Add +8.3% | 554,919 | $556.2M |
| Northern Trust Corp. | 0.07% | Add +1.1% | 489,120 | $534.8M |
| Royal Bank of Canada | 0.10% | Add +168.1% | 473,368 | $517.6M |
| Voya Investment Management LLC | 0.51% | Add +15.8% | 393,559 | $429.9M |
| Bank of America Corp. | 0.03% | Reduce -30.5% | 382,162 | $417.8M |
| Legal & General Group Plc | 0.10% | Add +6.6% | 380,089 | $415.6M |
| Brown Advisory Inc. | 0.68% | Reduce -24.1% | 379,897 | $415.4M |
| Charles Schwab Investment Management Inc. | 0.06% | Add +3.0% | 376,374 | $411.5M |
| Citigroup Inc. | 0.24% | Add +38.8% | 340,832 | $372.6M |
| Rafferty Asset Management, LLC | 1.41% | Reduce -19.9% | 317,473 | $347.1M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.07% | Reduce -5.2% | 302,205 | $330.4M |
| Bank of New York Mellon Corp | 0.06% | Reduce -1.8% | 289,830 | $316.9M |
| Vanguard Fiduciary Trust Co. | 0.08% | — | 278,499 | $304.5M |
| Kayne Anderson Rudnick Investment Management LLC | 0.86% | Reduce -9.3% | 266,670 | $291.6M |
| Wellington Management Group LLP | 0.05% | Reduce -34.9% | 250,511 | $273.9M |
| Anther Capital Ltd | 6.67% | — | 233,288 | $255.1M |
| BNP Paribas Financial Markets | 0.16% | Reduce -9.3% | 224,011 | $244.9M |
| American Century Companies Inc. | 0.11% | Reduce -1.9% | 199,685 | $218.3M |
| Raymond James Financial Inc. | 0.06% | Reduce -7.3% | 196,060 | $205.4M |
| SG Americas Securities, LLC | 0.22% | Reduce -30.7% | 181,766 | $198.7M |
| Deutsche Bank AG | 0.07% | Add +4.3% | 181,726 | $198.7M |
| DekaBank Deutsche Girozentrale | 0.32% | No change | 190,443 | $194.1M |
| Principal Financial Group Inc. | 0.10% | Add +4.2% | 174,199 | $190.5M |
| California Public Employees Retirement System | 0.11% | Add +88.2% | 159,658 | $174.6M |
| Amundi | 0.05% | Add +22.7% | 158,907 | $173.7M |
| HSBC Holdings PLC | 0.10% | Reduce -20.8% | 158,873 | $173.5M |
| Nuveen, LLC | 0.05% | Reduce -3.4% | 155,854 | $170.4M |
| Sei Investments Co. | 0.16% | Reduce -6.8% | 155,291 | $169.8M |
| FIL Ltd | 0.13% | Reduce -51.1% | 154,637 | $169.1M |
| Dimensional Fund Advisors LP | 0.03% | Add +1.8% | 153,767 | $168.1M |
| Earnest Partners LLC | 0.68% | Reduce -3.1% | 151,771 | $165.9M |
| Artisan Partners Limited Partnership | 0.27% | Reduce -1.9% | 150,873 | $165.0M |
| Neuberger Berman Group LLC | 0.13% | Reduce -17.4% | 150,107 | $164.1M |
| Nomura Asset Management International Inc. | 0.28% | Reduce -10.4% | 147,967 | $161.8M |
| Nomura Asset Management Co. Ltd. | 0.41% | Add +25.5% | 146,876 | $160.6M |
| Swiss National Bank | 0.09% | Add +7.1% | 140,540 | $153.7M |
| Vaughan Nelson Investment Management, L.P. | 1.53% | Reduce -45.9% | 139,352 | $152.4M |
| TimesSquare Capital Management, LLC | 2.58% | Reduce -1.0% | 138,840 | $151.8M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.25% | Reduce -33.0% | 135,938 | $148.6M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.10% | Add +10.8% | 131,582 | $143.9M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.17% | Add +12.3% | 130,003 | $142.1M |
| Envestnet Asset Management Inc. | 0.04% | Add +1.0% | 125,855 | $137.6M |
| Lord, Abbett & Co. LLC | 0.46% | Add +1074.4% | 121,847 | $133.2M |
| Allspring Global Investments Holdings, LLC | 0.22% | Reduce -22.5% | 118,806 | $133.0M |
| Pictet Asset Management Holding SA | 0.14% | Reduce -21.0% | 120,874 | $132.0M |
| Ameriprise Financial Inc. | 0.03% | Reduce -10.6% | 119,423 | $130.6M |
| Sumitomo Mitsui Trust Group, Inc. | 0.08% | Reduce -3.8% | 114,464 | $125.1M |
| Victory Capital Management Inc. | 0.08% | Reduce -2.6% | 111,992 | $122.4M |
| Vanguard Global Advisers, LLC | 0.06% | — | 106,602 | $116.6M |
| Alliancebernstein L.P. | 0.04% | Reduce -7.4% | 124,647 | $113.0M |
| Rhumbline Advisers | 0.10% | Reduce -2.0% | 102,110 | $111.6M |
| Wells Fargo & Company | 0.02% | Add +31.1% | 101,698 | $111.2M |
| Allianz Asset Management GmbH | 0.12% | Reduce -33.8% | 96,474 | $105.5M |
| Thrivent Financial for Lutherans | 0.20% | Reduce -14.0% | 96,116 | $105.1M |
| Natixis Advisors, LLC | 0.15% | Reduce -25.2% | 95,847 | $104.8M |
| Robeco Schweiz AG | 2.20% | Reduce -0.0% | 94,993 | $103.9M |
| DF Dent & Co. Inc. | 1.85% | Reduce -30.4% | 88,549 | $96.8M |
| Impax Asset Management Group plc | 0.67% | Reduce -16.7% | 88,456 | $96.7M |
| Caisse de depot et placement du Quebec | 0.15% | Reduce -37.9% | 85,159 | $93.1M |
| Congress Asset Management Co. | 0.65% | Reduce -8.1% | 83,343 | $91.1M |
| Mirae Asset Global Investments Co., Ltd. | 0.26% | Reduce -3.9% | 83,263 | $91.0M |
| Zevenbergen Capital Investments LLC | 2.58% | Add +0.7% | 81,911 | $89.6M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.08% | — | 81,837 | $89.5M |
| ProShare Advisors LLC | 0.13% | Reduce -18.1% | 81,441 | $89.0M |
| Frontier Capital Management Co. LLC | 0.90% | Reduce -5.3% | 79,699 | $87.1M |
| Stifel Financial Corp. | 0.08% | Reduce -1.7% | 79,334 | $86.8M |
| Ensign Peak Advisors, Inc | 0.16% | Reduce -4.6% | 78,096 | $85.4M |
| Baird Financial Group, Inc. | 0.13% | Reduce -23.9% | 74,271 | $81.2M |
| Adage Capital Partners Gp, L.L.C. | 0.12% | Reduce -5.4% | 73,652 | $80.5M |
| Quantinno Capital Management LP | 0.13% | Add +22.2% | 72,771 | $79.6M |
| California State Teachers Retirement System | 0.08% | Reduce -2.3% | 72,363 | $79.1M |
| TD Asset Management Inc | 0.06% | Reduce -3.0% | 72,110 | $78.8M |
| Liontrust Investment Partners LLP | 1.33% | Add +29.7% | 71,266 | $77.9M |
| STRS Ohio | 0.30% | Reduce -10.3% | 69,807 | $76.3M |
| Candriam S.C.A. | 0.39% | Reduce -27.0% | 68,944 | $75.4M |
| CIBC Bancorp USA Inc. | 0.10% | — | 68,819 | $75.2M |
| LPL Financial LLC | 0.02% | Add +6.0% | 67,944 | $74.3M |
| National Pension Service | 0.06% | Reduce -9.1% | 67,715 | $74.0M |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.15% | Reduce -28.0% | 64,842 | $70.9M |
| National Bank of Canada | 0.07% | Reduce -49.3% | 63,635 | $69.6M |
| Baron Capital (BAMCO) | 0.21% | Reduce -3.4% | 62,994 | $68.9M |
| CANADA LIFE ASSURANCE Co | 0.12% | Add +8.4% | 58,721 | $64.4M |
| EULAV Asset Management | 2.05% | Reduce -24.5% | 58,677 | $64.2M |
"% of holder's portfolio" is MPWR's weight in each manager's 13F, not the share of Monolithic Power Systems Inc. the manager owns.