MPWR Institutional Ownership
Who owns Monolithic Power Systems, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 1,250 funds reported holding MPWR at Jun 30, 2026, together owning 97.0% of the company.
- ▲628 buying vs 538 selling
- ▲Held by funds +0.8 pts
- ▲Funds holding +124
- ▲Superinvestors: 3 added, 1 cut
- ▲Put/call 1.44 to 0.97
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 1,250 | 1,126 | +11.0% |
| In funds' top 10 | 10 | 13 | −23.1% |
| 13F shares | 47.6M | 47.3M | +0.8% |
| Held by funds | 97.0% | 96.2% | +0.8 pts |
| New positions | 207 | 159 | +30.2% |
| Increased | 421 | 382 | +10.2% |
| Reduced | 461 | 407 | +13.3% |
| Sold out | 77 | 106 | −27.4% |
| Calls (shares) | 103K | 50K | +105.4% |
| Puts (shares) | 100K | 72K | +38.8% |
| Put/call ratio | 0.97 | 1.44 | −32.4% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in MPWR
All superinvestors →
Who owns MPWR
share of fund held shares- Index and passive funds42.5%
- Active managers and hedge funds37.1%
- Banks and brokers16.3%
- Pensions, insurers and other4.1%
The top 10 holders own 52.0% of all MPWR shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
446 funds changed their position- DekaBank Deutsche GirozentraleTrimmed−146K sh
- WT Asset Management LtdNew+138K sh
- Pembroke Management, LTDTrimmed−24K sh
- TimesSquare Capital Management, LLCTrimmed−20K sh
- Vest Financial, LLCTrimmed−17K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 11.37% | 5.6M | $7.7B | −483K |
| 2 | Fmr LLC | 10.54% | 5.2M | $7.2B | +776K |
| 3 | Vanguard Capital Management LLC | 6.36% | 3.1M | $4.3B | +43K |
| 4 | Vanguard Portfolio Management LLC | 5.10% | 2.5M | $3.5B | −12K |
| 5 | Invesco Ltd. | 4.77% | 2.3M | $3.2B | −172K |
| 6 | State Street Corp | 4.64% | 2.3M | $3.2B | +94K |
| 7 | Geode Capital Management, LLC | 2.43% | 1.2M | $1.6B | −237K |
| 8 | Price T Rowe Associates Inc /md/ | 1.99% | 977K | $1.4B | −286K |
| 9 | Franklin Resources Inc | 1.65% | 812K | $1.1B | −117K |
| 10 | Goldman Sachs Group Inc | 1.59% | 781K | $1.1B | +213K |
- Fmr LLC+776K sh+$1.1B
- Norges Bank+751K sh+$1B
- Van Eck Associates Corp+222K sh+$306M
- Goldman Sachs Group Inc+213K sh+$294M
- Two Sigma Investments, LP+178K sh+$247M
- Jane Street Group, LLC+174K sh+$241M
- Bank of America Corp /de/+154K sh+$213M
- Rafferty Asset Management, LLC+142K sh+$196M
- T. Rowe Price Investment Management, Inc.−722K sh−$789M
- BlackRock, Inc.−483K sh−$667M
- Price T Rowe Associates Inc /md/−286K sh−$396M
- Geode Capital Management, LLC−237K sh−$326M
- Brown Advisory Inc−199K sh−$276M
- Anther Capital Ltd−233K sh−$255M
- Wellington Management Group LLP−179K sh−$247M
- Invesco Ltd.−172K sh−$238M
MPWR institutional ownership FAQ
Who owns the most MPWR stock?
In Q2 2026 13F filings the largest holder of MPWR was BlackRock, Inc., followed by Fmr LLC and Vanguard Capital Management LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of MPWR is owned by institutions?
Funds that file 13F reports held 97.0% of MPWR's shares at Jun 30, 2026, compared with 96.2% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying MPWR?
In Q2 2026, 628 funds bought MPWR (207 of them new positions) and 538 sold (77 sold out completely). Among well known investors, 3 added and 1 cut. Our fund sentiment for MPWR is strongly bullish.
What is MPWR's institutional put/call ratio?
Funds reported $138M of MPWR puts against $142M of calls, a put/call ratio of 0.97 (1.44 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this MPWR ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.