Monolithic Power Systems, Inc. 13F holders
1,254 funds reported a position in Monolithic Power Systems, Inc. in their 13F for the quarter ended 30 June 2026, together 47.6 million shares worth $65.67 billion. Against the quarter before, 185 opened a position, 418 added, 463 trimmed and 79 sold out; together they sold a net 370,866 shares. The largest holders: BlackRock, Inc., FMR LLC and Vanguard Capital Management LLC.
Funds holding1,254+128 on Q1 2026
Shares they held47.6Mworth $65.67 billion
Net sold on the quarter370,866 sharesabout $511.1 million at the funds' values
Funds buying to selling603 to 542opened or added, to cut or sold
Opened 185Added 418Held 179Trimmed 463Sold out 79
What each fund did in MPWR against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in MPWR in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
4,696 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 649 reported a position in Monolithic Power Systems, Inc.: 55 opened one, 232 added, 233 trimmed and 61 sold out, a net 242,588 shares bought.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 1 reported a position in Monolithic Power Systems, Inc. in a 13F for the quarter ended 30 September 2026, and 8 more in a 13F for an earlier quarter, the latest each has filed. The largest: FMR LLC, 5.2 million shares worth $7.16 billion, 0.3% of its reported book (its 13F for the quarter ended 30 June 2026). In the quarter, 1 fund added or opened a position and 0 trimmed or sold out; together they bought a net 23,086 shares, about $31.0 million at the funds' own value per share on 30 September 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| FMR LLC | 5,177,258 | $7.16 billion | 0.3% | +776,427 | added | 30 June 2026, an earlier quarter | 13F |
| Geode Capital Management | 1,218,367 | $1.63 billion | 0.1% | +23,086 | added | 30 September 2026 | 13F |
| Norges Bank | 751,399 | $1.04 billion | 0.1% | held | 30 June 2026, an earlier quarter | 13F | |
| Two Sigma Investments | 190,505 | $263.3 million | 0.2% | +178,487 | added | 30 June 2026, an earlier quarter | 13F |
| Millennium Management | 136,835 | $189.2 million | 0.1% | +136,835 | new | 30 June 2026, an earlier quarter | 13F |
| Citadel Advisors | 63,487 | $87.8 million | 0.1% | +49,975 | added | 30 June 2026, an earlier quarter | 13F |
| Renaissance Technologies | 63,066 | $87.2 million | 0.1% | +63,066 | new | 30 June 2026, an earlier quarter | 13F |
| Bridgewater Associates | 3,096 | $4.3 million | 0.0% | -8,846 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Baillie Gifford | 5 | $6,912 | 0.0% | +5 | new | 30 June 2026, an earlier quarter | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 5,589,925 | 11.73% | $7.73 billion | 0.12% | -482,542 | 13F |
| FMR LLC | 5,177,258 | 10.87% | $7.16 billion | 0.31% | +776,427 | 13F |
| Vanguard Capital Management LLC | 3,126,756 | 6.56% | $4.32 billion | 0.09% | +43,307 | 13F |
| Vanguard Portfolio Management LLC | 2,504,858 | 5.26% | $3.46 billion | 0.16% | -11,634 | 13F |
| Invesco Ltd. | 2,343,930 | 4.92% | $3.24 billion | 0.26% | -172,057 | 13F |
| State Street Corp. | 2,282,186 | 4.79% | $3.16 billion | 0.09% | +93,732 | 13F |
| Geode Capital Management, LLC | 1,195,281 | 2.51% | $1.65 billion | 0.09% | -236,785 | 13F |
| Price T Rowe Associates Inc. | 976,798 | 2.05% | $1.35 billion | 0.14% | -286,156 | 13F |
| Franklin Resources Inc. | 811,974 | 1.70% | $1.12 billion | 0.24% | -116,697 | 13F |
| Goldman Sachs Group Inc. | 780,650 | 1.64% | $1.08 billion | 0.11% | +212,586 | 13F |
| Norges Bank | 751,399 | 1.58% | $1.04 billion | 0.10% | 13F | |
| Van Eck Associates Corp. | 746,237 | 1.57% | $1.03 billion | 0.63% | +221,666 | 13F |
| Morgan Stanley | 727,885 | 1.53% | $1.01 billion | 0.05% | +71,518 | 13F |
| Bank of America Corp. | 536,236 | 1.13% | $741.3 million | 0.05% | +154,074 | 13F |
| Royal Bank of Canada | 487,212 | 1.02% | $673.5 million | 0.11% | +13,844 | 13F |
| First Trust Advisors LP | 482,781 | 1.01% | $667.4 million | 0.39% | -108,572 | 13F |
| Northern Trust Corp. | 479,492 | 1.01% | $662.8 million | 0.08% | -9,628 | 13F |
| Barclays PLC | 474,132 | 1.00% | $655.4 million | 0.21% | -81,676 | 13F |
| Rafferty Asset Management, LLC | 459,278 | 0.96% | $634.9 million | 1.45% | +141,805 | 13F |
| UBS Group AG | 449,479 | 0.94% | $621.3 million | 0.10% | -90,934 | 13F |
| Massachusetts Financial Services Co. | 442,176 | 0.93% | $611.2 million | 0.19% | -125,593 | 13F |
| JPMorgan Chase & Co. | 434,949 | 0.91% | $571.0 million | 0.03% | -119,970 | 13F |
| Charles Schwab Investment Management Inc. | 388,951 | 0.82% | $537.7 million | 0.07% | +12,577 | 13F |
| Legal & General Group Plc | 359,936 | 0.76% | $497.6 million | 0.10% | -20,153 | 13F |
| Voya Investment Management LLC | 340,269 | 0.71% | $469.7 million | 0.44% | -53,290 | 13F |
| Citigroup Inc. | 325,281 | 0.68% | $449.7 million | 0.21% | -15,551 | 13F |
| UBS AM, a distinct business unit of UBS Asset Management Americas LLC | 292,368 | 0.61% | $404.2 million | 0.07% | -9,837 | 13F |
| Bank of New York Mellon Corp | 291,107 | 0.61% | $402.4 million | 0.07% | +1,277 | 13F |
| Vanguard Fiduciary Trust Co. | 279,965 | 0.59% | $387.0 million | 0.09% | +1,466 | 13F |
| FIL Ltd | 224,582 | 0.47% | $310.5 million | 0.22% | +69,945 | 13F |
| California Public Employees Retirement System | 223,899 | 0.47% | $309.5 million | 0.17% | +64,241 | 13F |
| BNP Paribas Financial Markets | 207,881 | 0.44% | $287.4 million | 0.15% | -16,130 | 13F |
| Kayne Anderson Rudnick Investment Management LLC | 206,130 | 0.43% | $284.9 million | 0.89% | -60,540 | 13F |
| Two Sigma Investments, LP | 190,505 | 0.40% | $263.3 million | 0.20% | +178,487 | 13F |
| HSBC Holdings PLC | 190,811 | 0.40% | $262.4 million | 0.13% | +31,938 | 13F |
| Jennison Associates LLC | 185,502 | 0.39% | $256.4 million | 0.15% | +136,108 | 13F |
| Brown Advisory Inc. | 180,434 | 0.38% | $249.5 million | 0.39% | -199,463 | 13F |
| Principal Financial Group Inc. | 180,241 | 0.38% | $249.2 million | 0.12% | +6,042 | 13F |
| Jane Street Group, LLC | 179,293 | 0.38% | $247.8 million | 0.16% | +174,210 | 13F |
| Deutsche Bank AG | 167,290 | 0.35% | $231.3 million | 0.07% | -14,436 | 13F |
| SG Americas Securities, LLC | 162,475 | 0.34% | $224.6 million | 0.13% | -19,291 | 13F |
| Neuberger Berman Group LLC | 156,360 | 0.33% | $216.1 million | 0.14% | +6,253 | 13F |
| Dimensional Fund Advisors LP | 154,447 | 0.32% | $213.4 million | 0.04% | +680 | 13F |
| Canada Pension Plan Investment Board | 148,792 | 0.31% | $205.7 million | 0.11% | +95,448 | 13F |
| Earnest Partners LLC | 148,707 | 0.31% | $205.6 million | 0.74% | -3,064 | 13F |
| Sei Investments Co. | 147,966 | 0.31% | $204.5 million | 0.18% | -7,325 | 13F |
| American Century Companies Inc. | 147,212 | 0.31% | $203.5 million | 0.09% | -52,473 | 13F |
| Amundi | 145,747 | 0.31% | $201.4 million | 0.05% | -13,160 | 13F |
| Raymond James Financial Inc. | 145,618 | 0.31% | $201.3 million | 0.06% | -50,442 | 13F |
| Vaughan Nelson Investment Management, L.P. | 144,974 | 0.30% | $200.4 million | 1.77% | +5,622 | 13F |
The 50 largest of the 1,254 funds that reported a position in MPWR in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on MPWR
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Puts | 85,300 | $117.9 million | 30 June 2026 | 13F |
| Citadel Advisors | Calls | 72,200 | $99.8 million | 30 June 2026 | 13F |
| Millennium Management | Calls | 20,600 | $28.5 million | 30 June 2026 | 13F |
| Millennium Management | Puts | 16,300 | $22.5 million | 30 June 2026 | 13F |
| Two Sigma Investments | Puts | 2,800 | $3.9 million | 30 June 2026 | 13F |
| Two Sigma Investments | Calls | 2,600 | $3.6 million | 30 June 2026 | 13F |
| Point72 Asset Management | Calls | 900 | $1.2 million | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 5 November 2026 | 13G/A | FMR LLC and 3 others | 4.5 million | 9.1% | 30 September 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 15 July 2026 | 13G | Invesco Ltd. and 1 other | 2.5 million | 5.2% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 8 July 2026 | 13G/A | FMR LLC and 3 others | 5.2 million | 10.5% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 30 April 2026 | 13G | Vanguard Capital Management and 1 other | 3.6 million | 7.2% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Portfolio Management and 1 other | 2.5 million | 5.1% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 27 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 5 February 2026 | 13G/A | FMR LLC and 3 others | 4.0 million | 8.3% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 8 January 2026 | 13G/A | BlackRock, Inc. and 1 other | 4.9 million | 10.2% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 13 August 2026 | 41 | $1,425.01 | SEC |
| 3 August 2026 | 1 | $1,426.03 | SEC |
| 17 July 2026 | 38 | $1,305.65 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.