Who owns MPWR?
Institutional ownership of Monolithic Power Systems Inc. from Form 13F, Q2 2026
1,240 institutional managers reported holding Monolithic Power Systems Inc. (MPWR) in Form 13F filings for Q2 2026, with 47,620,202 shares worth $65.6B. The largest reported holder was BlackRock, Inc. Managers that filed both quarters added a net 1,446,151 shares (+3.1%). 204 opened new positions and 76 sold out.
- Funds holding
- 1,240
- Value held
- $65.6B
- New / sold out
- 204 / 76
- Net shares, same filers
- +3.1%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of MPWR
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| BlackRock, Inc. | $7.7B | 11.7% | 5,589,925 | Trimmed |
| FMR LLC | $7.2B | 10.9% | 5,177,258 | Added |
| Vanguard Capital Management LLC | $4.3B | 6.6% | 3,126,756 | Added |
| Vanguard Portfolio Management LLC | $3.5B | 5.3% | 2,504,858 | Trimmed |
| Invesco Ltd. | $3.2B | 4.9% | 2,343,930 | Added |
| State Street Corp | $3.2B | 4.8% | 2,282,186 | Added |
| Geode Capital Management, LLC | $1.6B | 2.5% | 1,195,281 | Trimmed |
| Price T Rowe Associates Inc | $1.4B | 2.1% | 976,798 | Trimmed |
| Franklin Resources Inc | $1.1B | 1.7% | 811,974 | Trimmed |
| Goldman Sachs Group Inc | $1.1B | 1.6% | 780,650 | Added |
| Norges Bank | $1.0B | 1.6% | 751,399 | New |
| Van Eck Associates Corp | $1.0B | 1.6% | 746,237 | Added |
| Morgan Stanley | $1.0B | 1.5% | 727,885 | Added |
| Bank of America Corp | $741M | 1.1% | 536,236 | Added |
| Royal Bank of Canada | $674M | 1.0% | 487,212 | Added |
| First Trust Advisors LP | $667M | 1.0% | 482,781 | Trimmed |
| Northern Trust Corp | $663M | 1.0% | 479,492 | Trimmed |
| Barclays PLC | $655M | 1.0% | 474,132 | Trimmed |
| Rafferty Asset Management, LLC | $635M | 1.0% | 459,278 | Added |
| UBS Group AG | $621M | 0.9% | 449,479 | Trimmed |
| Massachusetts Financial Services Co | $611M | 0.9% | 442,176 | Trimmed |
| JPMorgan Chase & Co | $571M | 0.9% | 434,949 | Trimmed |
| Charles Schwab Investment Management Inc | $538M | 0.8% | 388,951 | Added |
| Legal & General Group Plc | $498M | 0.8% | 359,936 | Trimmed |
| Voya Investment Management LLC | $470M | 0.7% | 340,269 | Trimmed |
Share of 13F holdings is each fund's shares as a share of the 47,620,202 MPWR shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- Invesco Ltd. Added+$1.2B
- FMR LLC Added+$1.1B
- Norges Bank New+$1.0B
- Van Eck Associates Corp Added+$306M
- Goldman Sachs Group Inc Added+$294M
- Two Sigma Investments, LP Added+$247M
- Jane Street Group, LLC Added+$241M
- Bank of America Corp Added+$213M
- Rafferty Asset Management, LLC Added+$196M
- Millennium Management LLC New+$189M
Biggest sellers in Q2 2026
- T. Rowe Price Investment Management, Inc. Sold out-$789M
- BlackRock, Inc. Trimmed-$667M
- Price T Rowe Associates Inc Trimmed-$396M
- Geode Capital Management, LLC Trimmed-$326M
- Brown Advisory Inc Trimmed-$276M
- Anther Capital Ltd Sold out-$255M
- Wellington Management Group LLP Trimmed-$247M
- Massachusetts Financial Services Co Trimmed-$174M
- Franklin Resources Inc Trimmed-$161M
- Nomura Asset Management Co LTD Trimmed-$159M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $8.5B and sold $6.2B; 416 added and 450 trimmed.
Schedule 13D and 13G filings on MPWR
Owners of more than 5% must file within days, so these can be newer than the 13F data.
- 2026-07-15Invesco Ltd. SCHEDULE 13G filed by Monolithic Power Systems Inc.Schedule 13G
Questions about MPWR ownership
- Who owns MPWR stock?
- 1,240 institutional investment managers reported MPWR positions in their Form 13F filings for Q2 2026, holding 47,620,202 shares worth $65.6B in total. BlackRock, Inc. reported the largest position.
- Are funds buying or selling MPWR?
- In Q2 2026, 204 managers opened new MPWR positions, 416 added, 450 trimmed and 76 sold out. Managers that filed in both quarters added a net 1,446,151 shares.
- How current is this MPWR institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to MPWR by CUSIP. Options are left out. MPWR news and filings · MPWR insider trades · Top funds