MONOLITHIC POWER SYSTEMS INC (MPWR) Institutional Shareholders
MONOLITHIC POWER SYSTEMS INC (MPWR) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $46.43B in MPWR holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MPWR tracked by InsiderSet, reporting ownership valued at approximately $6.64B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $8.66B, representing an estimated gain of +30.43% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 55% of the total disclosed MPWR value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Fmr Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in MONOLITHIC POWER SYSTEMS INC (MPWR).
This page ranks the largest institutional MPWR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,127
Total Reported Value
$46.43B
Largest Holder
Blackrock, Inc.
Largest Position
$6.64B
Insider Transactions (90d)
40
Latest Filing Quarter
Q2 2026
New Institutional Positions
49
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.12% | 6,072,467 | $6,639,332,032 | $8,659,520,116 | +$2,020,188,084 | +30.43% | |
| Fmr Llc | 0.25% | 4,400,831 | $4,811,648,189 | $6,275,717,031 | +$1,464,068,842 | +30.43% | |
| Vanguard Capital Management Llc | 0.08% | 3,083,449 | $3,371,288,965 | $4,397,090,777 | +$1,025,801,812 | +30.43% | |
| Vanguard Portfolio Management Llc | 0.15% | 2,516,492 | $2,751,406,528 | $3,588,593,087 | +$837,186,559 | +30.43% | |
| State Street Corp | 0.08% | 2,188,454 | $2,397,061,793 | $3,120,801,058 | +$723,739,265 | +30.19% | |
| Invesco Ltd. | 0.25% | 1,485,093 | $1,623,726,783 | $2,117,787,171 | +$494,060,388 | +30.43% | |
| Geode Capital Management, Llc | 0.10% | 1,432,066 | $1,560,540,423 | $2,042,169,078 | +$481,628,655 | +30.86% | |
| Franklin Resources Inc | 0.25% | 928,671 | $1,015,362,732 | $1,324,312,706 | +$308,949,974 | +30.43% | |
| Morgan Stanley | 0.04% | 656,353 | $717,626,655 | $935,979,069 | +$218,352,414 | +30.43% | |
| First Trust Advisors Lp | 0.46% | 591,353 | $646,556,012 | $843,287,119 | +$196,731,107 | +30.43% | |
| Goldman Sachs Group Inc | 0.08% | 568,064 | $621,092,710 | $810,076,306 | +$188,983,596 | +30.43% | |
| Massachusetts Financial Services Co | 0.21% | 567,769 | $620,748,732 | $809,655,627 | +$188,906,895 | +30.43% | |
| Barclays Plc | 0.22% | 555,808 | $607,692,677 | $792,598,882 | +$184,906,205 | +30.43% | |
| Ubs Group Ag | 0.10% | 540,413 | $590,860,554 | $770,645,150 | +$179,784,596 | +30.43% | |
| Northern Trust Corp | 0.07% | 489,120 | $534,779,352 | $697,499,794 | +$162,720,442 | +30.43% | |
| Royal Bank Of Canada | 0.10% | 473,368 | $517,557,000 | $675,036,969 | +$157,479,969 | +30.43% | |
| Voya Investment Management Llc | 0.45% | 393,559 | $429,851,204 | $561,226,941 | +$131,375,737 | +30.56% | |
| Bank Of America Corp | 0.03% | 382,162 | $417,836,944 | $544,974,477 | +$127,137,533 | +30.43% | |
| Legal & General Group Plc | 0.10% | 380,089 | $415,570,309 | $542,018,317 | +$126,448,008 | +30.43% | |
| Brown Advisory Inc | 0.68% | 379,897 | $415,383,257 | $541,744,519 | +$126,361,262 | +30.42% | |
| Charles Schwab Investment Management Inc | 0.06% | 376,374 | $411,508,513 | $536,720,615 | +$125,212,102 | +30.43% | |
| Citigroup Inc | 0.24% | 340,832 | $372,648,381 | $486,036,657 | +$113,388,276 | +30.43% | |
| Rafferty Asset Management, Llc | 1.41% | 317,473 | $347,109,105 | $452,726,022 | +$105,616,917 | +30.43% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.07% | 302,205 | $330,415,835 | $430,953,396 | +$100,537,561 | +30.43% | |
| Bank Of New York Mellon Corp | 0.06% | 289,830 | $316,885,651 | $413,306,275 | +$96,420,624 | +30.43% | |
| Vanguard Fiduciary Trust Co | 0.08% | 278,499 | $304,496,882 | $397,147,929 | +$92,651,047 | +30.43% | |
| Kayne Anderson Rudnick Investment Management Llc | 0.86% | 266,670 | $291,564,069 | $380,279,420 | +$88,715,351 | +30.43% | |
| Wellington Management Group Llp | 0.05% | 250,511 | $273,896,201 | $357,236,201 | +$83,340,000 | +30.43% | |
| Anther Capital Ltd | 6.67% | 233,288 | $255,065,435 | $332,675,687 | +$77,610,252 | +30.43% | |
| Bnp Paribas Financial Markets | 0.16% | 224,011 | $244,922,427 | $319,446,406 | +$74,523,979 | +30.43% | |
| American Century Companies Inc | 0.11% | 199,685 | $218,332,126 | $284,756,801 | +$66,424,675 | +30.42% | |
| Raymond James Financial Inc | 0.06% | 196,060 | $205,377,338 | $279,587,442 | +$74,210,104 | +36.13% | |
| Vaughan Nelson Investment Management, L.P. | 1.77% | 144,974 | $200,406,257 | $206,737,273 | +$6,331,016 | +3.16% | |
| Deutsche Bank Ag\ | 0.07% | 181,726 | $198,690,122 | $259,146,728 | +$60,456,606 | +30.43% | |
| Principal Financial Group Inc | 0.10% | 174,199 | $190,462,749 | $248,413,000 | +$57,950,251 | +30.43% | |
| California Public Employees Retirement System | 0.11% | 159,658 | $174,562,074 | $227,677,098 | +$53,115,024 | +30.43% | |
| Amundi | 0.05% | 158,907 | $173,730,281 | $226,606,149 | +$52,875,868 | +30.44% | |
| Hsbc Holdings Plc | 0.10% | 158,873 | $173,508,324 | $226,557,664 | +$53,049,340 | +30.57% | |
| Nuveen, Llc | 0.05% | 155,854 | $170,402,970 | $222,252,480 | +$51,849,510 | +30.43% | |
| Sei Investments Co | 0.16% | 155,291 | $169,786,734 | $221,449,625 | +$51,662,891 | +30.43% | |
| Fil Ltd | 0.13% | 154,637 | $169,072,364 | $220,517,001 | +$51,444,637 | +30.43% | |
| Dimensional Fund Advisors Lp | 0.03% | 153,767 | $168,060,370 | $219,276,355 | +$51,215,985 | +30.47% | |
| Earnest Partners Llc | 0.68% | 151,771 | $165,938,823 | $216,429,999 | +$50,491,176 | +30.43% | |
| Artisan Partners Limited Partnership | 0.27% | 150,873 | $164,957,133 | $215,149,424 | +$50,192,291 | +30.43% | |
| Neuberger Berman Group Llc | 0.12% | 150,107 | $164,120,028 | $214,057,085 | +$49,937,057 | +30.43% | |
| Nomura Asset Management International Inc. | 0.28% | 147,967 | $161,780,000 | $211,005,381 | +$49,225,381 | +30.43% | |
| Nomura Asset Management Co Ltd | 0.41% | 146,876 | $160,586,874 | $209,449,582 | +$48,862,708 | +30.43% | |
| Swiss National Bank | 0.09% | 140,540 | $153,659,409 | $200,414,256 | +$46,754,847 | +30.43% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.09% | 110,819 | $153,191,753 | $158,031,219 | +$4,839,466 | +3.16% | |
| Timessquare Capital Management, Llc | 2.58% | 138,840 | $151,800,714 | $197,990,005 | +$46,189,291 | +30.43% |
Frequently asked questions about MPWR
Who owns the most MPWR stock?
The largest holders of MPWR are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MONOLITHIC POWER SYSTEMS INC (MPWR).
Is MPWR widely held by superinvestors?
Many widely followed stocks like MPWR appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MPWR is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.