Monolithic Power SystemsMPWR
13F holders, Q3 2025 (September 30)981holders +75
153new positions
74sold out
8famous investors
$916.63avg. 13F price*
At the end of Q3 2025, 981 institutions reported holding Monolithic Power Systems Inc. (MPWR) in their 13F filings, up 75 from Q2 2025. 153 opened new positions and 74 sold out. The largest holders were Vanguard Group Inc. ($5.6B), BlackRock, Inc. ($5.3B) and FMR LLC ($3.3B). 8 famous investors held it, including Ken Griffin (0.2% of Citadel Advisors's portfolio), Israel Englander (0.1% of Millennium Management's portfolio) and Ron Baron (0.1% of Baron Capital (BAMCO)'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 Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 153 | $470.5M |
| Exits | 74 | $333.0M |
All 13F filers, Q2 2025 → Q3 2025: 2,981,753 shares bought and 3,218,349 shares sold, net −236,596 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 981 holders
| Vanguard Group Inc. | 0.08% | Add +2.3% | 6,074,033 | $5.6B |
| BlackRock, Inc. | 0.09% | Add +9.5% | 5,726,774 | $5.3B |
| FMR LLC | 0.17% | Add +5.1% | 3,564,796 | $3.3B |
| State Street Corp. | 0.07% | Add +0.7% | 2,134,704 | $2.0B |
| T. Rowe Price Associates Inc. | 0.16% | Reduce -24.7% | 1,573,798 | $1.4B |
| Geode Capital Management, LLC | 0.08% | Add +1.4% | 1,337,697 | $1.2B |
| Invesco Ltd. | 0.17% | Reduce -2.3% | 1,139,133 | $1.0B |
| Franklin Resources Inc. | 0.24% | Reduce -3.3% | 1,052,053 | $968.6M |
| JPMorgan Chase & Co. | 0.05% | Add +0.8% | 863,228 | $794.7M |
| T. Rowe Price Investment Management, Inc. | 0.42% | Reduce -19.1% | 750,688 | $691.1M |
| Van Eck Associates Corp. | 0.63% | Reduce -23.1% | 732,448 | $674.3M |
| Brown Advisory Inc. | 0.88% | Reduce -15.5% | 730,119 | $672.2M |
| Bank of America Corp. | 0.05% | Add +4.3% | 722,816 | $665.5M |
| Morgan Stanley | 0.03% | Reduce -1.1% | 558,671 | $514.3M |
| Massachusetts Financial Services Co. | 0.16% | Add +14.7% | 556,587 | $512.4M |
| UBS Group AG | 0.10% | Add +5.1% | 528,319 | $486.4M |
| FIL Ltd | 0.36% | Reduce -4.9% | 497,333 | $457.9M |
| Northern Trust Corp. | 0.06% | Add +0.8% | 485,831 | $447.3M |
| Wellington Management Group LLP | 0.07% | Reduce -35.6% | 452,938 | $417.0M |
| First Trust Advisors LP | 0.31% | Add +66.4% | 447,801 | $412.3M |
| Goldman Sachs Group Inc. | 0.06% | Reduce -15.3% | 434,325 | $399.9M |
| Rafferty Asset Management, LLC | 1.13% | Reduce -28.3% | 379,318 | $349.2M |
| Barclays PLC | 0.12% | Reduce -17.4% | 362,062 | $333.3M |
| Voya Investment Management LLC | 0.38% | Add +57.5% | 359,312 | $330.8M |
| Legal & General Group Plc | 0.07% | Add +2.2% | 358,429 | $330.0M |
| Charles Schwab Investment Management Inc. | 0.05% | Add +4.1% | 357,910 | $329.5M |
| Kayne Anderson Rudnick Investment Management LLC | 0.80% | Reduce -2.4% | 355,363 | $327.2M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.06% | Reduce -2.3% | 315,922 | $290.9M |
| Bank of New York Mellon Corp | 0.05% | Reduce -9.6% | 304,091 | $280.0M |
| Alliancebernstein L.P. | 0.08% | Reduce -10.6% | 280,703 | $258.4M |
| Vaughan Nelson Investment Management, L.P. | 2.28% | Add +0.2% | 272,529 | $250.9M |
| Raymond James Financial Inc. | 0.08% | Reduce -6.7% | 267,212 | $246.0M |
| Citadel Advisors | 0.20% | Add +3304.8% | 260,466 | $239.8M |
| American Century Companies Inc. | 0.10% | Add +18.1% | 214,950 | $197.9M |
| Royal Bank of Canada | 0.03% | Add +8.5% | 206,617 | $190.2M |
| Earnest Partners LLC | 0.82% | Add +1.3% | 205,779 | $189.4M |
| Sei Investments Co. | 0.20% | Add +0.1% | 199,686 | $183.8M |
| Artisan Partners Limited Partnership | 0.26% | Reduce -7.2% | 192,749 | $177.5M |
| Macquarie Group Ltd. | 0.19% | Reduce -7.0% | 180,795 | $166.4M |
| DekaBank Deutsche Girozentrale | 0.28% | No change | 190,443 | $165.9M |
| Citigroup Inc. | 0.11% | Reduce -36.1% | 178,183 | $164.0M |
| Deutsche Bank AG | 0.05% | Add +6.0% | 173,754 | $160.0M |
| Millennium Management | 0.13% | Add +997.7% | 170,490 | $157.0M |
| Allspring Global Investments Holdings, LLC | 0.25% | Add +2.6% | 171,221 | $156.8M |
| Principal Financial Group Inc. | 0.08% | Reduce -0.1% | 169,712 | $156.2M |
| BNP Paribas Financial Markets | 0.12% | Reduce -13.4% | 168,996 | $155.6M |
| Neuberger Berman Group LLC | 0.11% | Add +52.0% | 167,806 | $154.5M |
| Frontier Capital Management Co. LLC | 1.35% | Add +23.4% | 163,916 | $150.9M |
| Ensign Peak Advisors, Inc | 0.25% | Reduce -15.3% | 163,239 | $150.3M |
| Ameriprise Financial Inc. | 0.03% | Reduce -26.8% | 160,204 | $147.5M |
| Envestnet Asset Management Inc. | 0.04% | Reduce -6.0% | 159,740 | $147.1M |
| Pictet Asset Management Holding SA | 0.14% | Reduce -4.5% | 157,791 | $145.2M |
| Dimensional Fund Advisors LP | 0.03% | Add +4.1% | 156,577 | $144.1M |
| DF Dent & Co. Inc. | 1.78% | Reduce -12.5% | 149,730 | $137.8M |
| Amundi | 0.04% | Add +4.2% | 137,635 | $131.1M |
| TimesSquare Capital Management, LLC | 1.86% | Reduce -4.7% | 141,011 | $129.8M |
| Swiss National Bank | 0.07% | Reduce -4.7% | 138,100 | $127.1M |
| HSBC Holdings PLC | 0.07% | Reduce -3.3% | 137,912 | $126.3M |
| Nuveen, LLC | 0.03% | Reduce -2.6% | 134,146 | $123.5M |
| Marshall Wace, LLP | 0.13% | New | 132,145 | $121.7M |
| Natixis Advisors, LLC | 0.18% | Reduce -1.0% | 131,259 | $120.8M |
| Impax Asset Management Group plc | 0.70% | Reduce -24.4% | 131,401 | $120.0M |
| Susquehanna International Group, LLP | 0.18% | Add +70.8% | 129,902 | $119.6M |
| Janus Henderson Group PLC | 0.05% | Add +0.2% | 127,738 | $117.5M |
| Nomura Asset Management Co. Ltd. | 0.29% | Add +78.0% | 122,401 | $112.7M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.20% | Reduce -7.9% | 116,896 | $107.6M |
| AXA Investment Managers S.A. | 0.29% | — | 115,618 | $106.4M |
| Sumitomo Mitsui Trust Group, Inc. | 0.06% | Reduce -0.0% | 112,504 | $103.6M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.07% | Add +2.2% | 112,332 | $103.4M |
| Manufacturers Life Insurance Company, The | 0.08% | Add +3.8% | 111,107 | $102.3M |
| Baird Financial Group, Inc. | 0.16% | Add +3.9% | 108,385 | $99.8M |
| EULAV Asset Management | 2.32% | Reduce -6.9% | 108,277 | $99.7M |
| Congress Asset Management Co. | 0.66% | Reduce -13.5% | 108,271 | $99.7M |
| Rhumbline Advisers | 0.08% | Reduce -8.3% | 107,428 | $98.9M |
| Robeco Schweiz AG | 2.14% | Reduce -3.3% | 103,237 | $95.0M |
| Stifel Financial Corp. | 0.08% | Reduce -5.7% | 99,322 | $91.5M |
| Victory Capital Management Inc. | 0.05% | Reduce -4.0% | 88,206 | $81.2M |
| Candriam S.C.A. | 0.42% | Add +6.9% | 85,907 | $79.1M |
| California Public Employees Retirement System | 0.05% | Reduce -14.1% | 85,230 | $78.5M |
| Adage Capital Partners Gp, L.L.C. | 0.12% | Add +9.5% | 83,152 | $76.6M |
| Allianz Asset Management GmbH | 0.09% | Reduce -27.4% | 80,277 | $73.9M |
| National Pension Service | 0.06% | Add +2.4% | 79,014 | $72.7M |
| STRS Ohio | 0.26% | Reduce -28.9% | 77,807 | $71.6M |
| Analog Century Management LP | 3.84% | New | 77,591 | $71.4M |
| California State Teachers Retirement System | 0.07% | Add +0.5% | 74,748 | $68.8M |
| Zevenbergen Capital Investments LLC | 1.34% | Add +76.0% | 74,668 | $68.7M |
| TD Asset Management Inc | 0.06% | Reduce -16.9% | 74,628 | $68.7M |
| Wells Fargo & Company | 0.01% | Reduce -12.4% | 71,877 | $66.2M |
| Resona Asset Management Co.,Ltd. | 0.31% | Reduce -12.5% | 70,729 | $64.5M |
| Caisse de depot et placement du Quebec | 0.11% | Add +1.2% | 66,754 | $61.5M |
| HRT Financial LP | 0.22% | New | 65,877 | $60.6M |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.14% | Reduce -7.5% | 65,413 | $60.2M |
| Grandeur Peak Global Advisors, LLC | 8.05% | Reduce -4.6% | 65,175 | $60.0M |
| CANADA LIFE ASSURANCE Co | 0.09% | Add +1.1% | 67,650 | $59.9M |
| Toronto Dominion Bank | 0.12% | Add +167.4% | 65,057 | $59.9M |
| Panagora Asset Management Inc. | 0.23% | Add +0.4% | 62,607 | $57.6M |
| CIBC Private Wealth Group LLC | 0.10% | Reduce -2.0% | 62,363 | $57.4M |
| Mirae Asset Global Investments Co., Ltd. | 0.17% | Reduce -25.0% | 58,354 | $53.7M |
| LPL Financial LLC | 0.02% | Reduce -2.0% | 58,083 | $53.5M |
| Pacer Advisors, Inc. | 0.14% | Add +7.4% | 57,643 | $53.1M |
"% of holder's portfolio" is MPWR's weight in each manager's 13F, not the share of Monolithic Power Systems Inc. the manager owns.