Monolithic Power Systems, Inc.
MPWR- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001280452
In the last 90 days, Monolithic Power Systems, Inc. insiders filed 0 open-market purchases and 9 sales; 1,250 institutions reported holding it in 13F filings for Q2 2026, worth $65.6B in total; superinvestors D1 Capital Partners and Maverick Capital hold it.
13F holders, Q3 2025
Institutional positions in Monolithic Power Systems, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 981
- +89 vs. Q2 2025
- Shares held
- 46.8M
- +118.5K (+0.3%) vs. Q2 2025
- Total value
- $43.0B
- +$8.79B (+25.7%) vs. Q2 2025
- New holders
- 164
- 361 more added
- Sold out
- 75
- 317 more reduced
15 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MPWR on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1,250 | $65.6B |
| Q1 2026 | 1,124 | $51.6B |
| Q4 2025 | 1,061 | $44.2B |
| Q3 2025 | 981 | $43.0B |
| Q2 2025 | 907 | $34.6B |
| Q1 2025 | 862 | $27.0B |
| Q4 2024 | 864 | $27.6B |
| Q3 2024 | 885 | $42.8B |
| Q2 2024 | 838 | $38.6B |
| Q1 2024 | 807 | $31.2B |
| Q4 2023 | 737 | $28.6B |
| Q3 2023 | 655 | $21.2B |
| Q2 2023 | 652 | $25.2B |
| Q1 2023 | 669 | $23.3B |
| Q4 2022 | 611 | $16.5B |
| Q3 2022 | 630 | $16.6B |
| Q2 2022 | 625 | $16.8B |
| Q1 2022 | 611 | $21.3B |
| Q4 2021 | 627 | $21.5B |
| Q3 2021 | 579 | $21.1B |
| Q2 2021 | 533 | $16.1B |
| Q1 2021 | 530 | $15.1B |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Monolithic Power Systems, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Allianz Asset Management GmbH | 80,277 | $73.9M | 0.09% | −30,275−27.4% | Reduced |
| Adage Capital Partners GP, L.L.C. | 83,152 | $76.6M | 0.12% | +7,200+9.5% | Added |
| California Public Employees Retirement System | 85,230 | $78.5M | 0.05% | −13,953−14.1% | Reduced |
| Candriam Luxembourg S.C.A. | 85,907 | $79.1M | 0.41% | +5,561+6.9% | Added |
| Victory Capital Management Inc | 88,206 | $81.2M | 0.05% | −3,651−4.0% | Reduced |
| Stifel Financial Corp | 99,322 | $91.5M | 0.08% | −6,011−5.7% | Reduced |
| Robeco Schweiz AG | 103,237 | $95.0M | 2.14% | −3,506−3.3% | Reduced |
| Rhumbline Advisers | 107,428 | $98.9M | 0.08% | −9,666−8.3% | Reduced |
| Congress Asset Management Co | 108,271 | $99.7M | 0.66% | −16,898−13.5% | Reduced |
| EULAV Asset Management | 108,277 | $99.7M | 2.32% | −7,999−6.9% | Reduced |
| Baird Financial Group, Inc. | 108,385 | $99.8M | 0.16% | +4,052+3.9% | Added |
| Manufacturers Life Insurance Company, The | 111,107 | $102.3M | 0.08% | +4,069+3.8% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 112,332 | $103.4M | 0.07% | +2,398+2.2% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 112,504 | $103.6M | 0.06% | −120.0% | Reduced |
| AXA Investment Managers S.A. | 115,618 | $106.4M | 0.29% | +115,618 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 116,896 | $107.6M | 0.20% | −10,014−7.9% | Reduced |
| Nomura Asset Management Co Ltd | 122,401 | $112.7M | 0.29% | +53,629+78.0% | Added |
| Janus Henderson Group PLC | 127,738 | $117.5M | 0.05% | +309+0.2% | Added |
| Susquehanna International Group, LLP | 129,902 | $119.6M | 0.17% | +53,829+70.8% | Added |
| Impax Asset Management Group plc | 131,401 | $120.0M | 0.70% | −42,443−24.4% | Reduced |
| Natixis Advisors, L.P. | 131,259 | $120.8M | 0.18% | −1,330−1.0% | Reduced |
| Marshall Wace, LLP | 132,145 | $121.7M | 0.13% | +132,145 | New |
| Nuveen, LLC | 134,146 | $123.5M | 0.03% | −3,652−2.7% | Reduced |
| HSBC Holdings PLC | 137,912 | $126.3M | 0.07% | −4,654−3.3% | Reduced |
| Swiss National Bank | 138,100 | $127.1M | 0.07% | −6,800−4.7% | Reduced |
| TimesSquare Capital Management, LLC | 141,011 | $129.8M | 1.86% | −6,896−4.7% | Reduced |
| Amundi | 137,635 | $131.1M | 0.04% | +5,515+4.2% | Added |
| DF Dent & Co Inc | 149,730 | $137.8M | 1.78% | −21,348−12.5% | Reduced |
| Dimensional Fund Advisors LP | 156,577 | $144.1M | 0.03% | +6,216+4.1% | Added |
| Pictet Asset Management Holding SA | 157,791 | $145.2M | 0.14% | −7,374−4.5% | Reduced |
| Envestnet Asset Management Inc | 159,740 | $147.1M | 0.04% | −10,167−6.0% | Reduced |
| Ameriprise Financial Inc | 160,204 | $147.5M | 0.03% | −58,773−26.8% | Reduced |
| Ensign Peak Advisors, Inc | 163,239 | $150.3M | 0.25% | −29,552−15.3% | Reduced |
| Frontier Capital Management Co LLC | 163,916 | $150.9M | 1.35% | +31,073+23.4% | Added |
| Neuberger Berman Group LLC | 167,806 | $154.5M | 0.11% | +57,417+52.0% | Added |
| BNP Paribas Arbitrage, SA | 168,996 | $155.6M | 0.12% | −26,138−13.4% | Reduced |
| Principal Financial Group Inc | 169,712 | $156.2M | 0.08% | −133−0.1% | Reduced |
| Allspring Global Investments Holdings, LLC | 171,221 | $156.8M | 0.25% | +4,379+2.6% | Added |
| Millennium Management LLC | 170,490 | $157.0M | 0.12% | +154,958+997.7% | Added |
| Deutsche Bank AG | 173,754 | $160.0M | 0.05% | +9,836+6.0% | Added |
| Citigroup Inc | 178,183 | $164.0M | 0.11% | −100,746−36.1% | Reduced |
| DekaBank Deutsche Girozentrale | 190,443 | $165.9M | 0.28% | 00.0% | Unchanged |
| Macquarie Group Ltd | 180,795 | $166.4M | 0.19% | −13,699−7.0% | Reduced |
| Artisan Partners Limited Partnership | 192,749 | $177.5M | 0.26% | −14,898−7.2% | Reduced |
| SEI Investments Co | 199,686 | $183.8M | 0.20% | +199+0.1% | Added |
| Earnest Partners LLC | 205,779 | $189.4M | 0.82% | +2,643+1.3% | Added |
| Royal Bank of Canada | 206,617 | $190.2M | 0.03% | +16,215+8.5% | Added |
| American Century Companies Inc | 214,950 | $197.9M | 0.10% | +33,024+18.2% | Added |
| Citadel Advisors LLC | 260,466 | $239.8M | 0.19% | +252,816+3,304.8% | Added |
| Raymond James Financial Inc | 267,212 | $246.0M | 0.08% | −19,236−6.7% | Reduced |
| Vaughan Nelson Investment Management, L.P. | 272,529 | $250.9M | 2.28% | +482+0.2% | Added |
| Alliancebernstein L.P. | 280,703 | $258.4M | 0.08% | −33,433−10.6% | Reduced |
| Bank of New York Mellon Corp | 304,091 | $280.0M | 0.05% | −32,459−9.6% | Reduced |
| UBS Asset Management Americas Inc | 315,922 | $290.9M | 0.06% | −7,371−2.3% | Reduced |
| Kayne Anderson Rudnick Investment Management LLC | 355,363 | $327.2M | 0.80% | −8,595−2.4% | Reduced |
| Charles Schwab Investment Management Inc | 357,910 | $329.5M | 0.05% | +13,949+4.1% | Added |
| Legal & General Group Plc | 358,429 | $330.0M | 0.07% | +7,855+2.2% | Added |
| Voya Investment Management LLC | 359,312 | $330.8M | 0.33% | +131,177+57.5% | Added |
| Barclays PLC | 362,062 | $333.3M | 0.12% | −76,537−17.5% | Reduced |
| Rafferty Asset Management, LLC | 379,318 | $349.2M | 1.13% | −149,806−28.3% | Reduced |
| Goldman Sachs Group Inc | 434,325 | $399.9M | 0.06% | −78,123−15.2% | Reduced |
| First Trust Advisors LP | 447,801 | $412.3M | 0.31% | +178,622+66.4% | Added |
| Wellington Management Group LLP | 452,938 | $417.0M | 0.07% | −250,213−35.6% | Reduced |
| Northern Trust Corp | 485,831 | $447.3M | 0.06% | +3,774+0.8% | Added |
| FIL Ltd | 497,333 | $457.9M | 0.36% | −25,740−4.9% | Reduced |
| UBS Group AG | 528,319 | $486.4M | 0.10% | +25,783+5.1% | Added |
| Massachusetts Financial Services Co | 556,587 | $512.4M | 0.16% | +71,199+14.7% | Added |
| Morgan Stanley | 558,671 | $514.3M | 0.03% | −6,348−1.1% | Reduced |
| Bank of America Corp | 722,816 | $665.5M | 0.05% | +30,069+4.3% | Added |
| Brown Advisory Inc | 730,119 | $672.2M | 0.88% | −134,190−15.5% | Reduced |
| Van Eck Associates Corp | 732,448 | $674.3M | 0.63% | −219,612−23.1% | Reduced |
| T. Rowe Price Investment Management, Inc. | 750,688 | $691.1M | 0.42% | −177,118−19.1% | Reduced |
| JPMorgan Chase & Co | 863,228 | $794.7M | 0.05% | +6,503+0.8% | Added |
| Franklin Resources Inc | 1,052,053 | $968.6M | 0.24% | −36,244−3.3% | Reduced |
| Invesco Ltd. | 1,139,133 | $1.05B | 0.17% | −26,926−2.3% | Reduced |
| Geode Capital Management, LLC | 1,337,697 | $1.23B | 0.08% | +19,156+1.5% | Added |
| Price T Rowe Associates Inc | 1,573,798 | $1.45B | 0.16% | −515,006−24.7% | Reduced |
| State Street Corp | 2,134,704 | $1.97B | 0.07% | +14,670+0.7% | Added |
| FMR LLC | 3,564,796 | $3.28B | 0.17% | +172,092+5.1% | Added |
| BlackRock, Inc. | 5,726,774 | $5.27B | 0.09% | +497,553+9.5% | Added |
| Vanguard Group Inc | 6,074,033 | $5.59B | 0.08% | +134,087+2.3% | Added |
| Erste Asset Management GmbH | 0 | $0 | 0.00% | −1,818−100.0% | Sold out |
| Rokos Capital Management LLP | 0 | $0 | 0.00% | −121,436−100.0% | Sold out |
| AXA S.A. | 0 | $0 | 0.00% | −104,584−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −48,016−100.0% | Sold out |
| Capital Fund Management S.A. | 0 | $0 | 0.00% | −30,545−100.0% | Sold out |
| Davidson Kempner Capital Management LP | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| Meridiem Capital Partners LP | 0 | $0 | 0.00% | −15,100−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −13,044−100.0% | Sold out |
| ICICI Prudential Asset Management Co Ltd | 0 | $0 | 0.00% | −12,877−100.0% | Sold out |
| Greenland Capital Management LP | 0 | $0 | 0.00% | −9,517−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −8,541−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −7,290−100.0% | Sold out |
| Edgestream Partners, L.P. | 0 | $0 | 0.00% | −7,183−100.0% | Sold out |
| Mirabaud Asset Management Ltd | 0 | $0 | 0.00% | −5,627−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −5,177−100.0% | Sold out |
| Burr Financial Services, LLC | 0 | $0 | 0.00% | −4,660−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −4,289−100.0% | Sold out |
| Hel Ved Capital Management Ltd | 0 | $0 | 0.00% | −4,000−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −3,298−100.0% | Sold out |