MRK Institutional Ownership
Who owns Merck & Co., Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 3,849 funds reported holding MRK at Jun 30, 2026, together owning 80.3% of the company.
- ●1,728 buying vs 1,584 selling
- ▲Held by funds +2.0 pts
- ●Funds holding +36
- ▼Superinvestors: 1 added, 3 cut
- ▲Put/call 1.52 to 1.36
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 | 3,849 | 3,813 | +0.9% |
| In funds' top 10 | 79 | 89 | −11.2% |
| 13F shares | 1.98B | 1.93B | +2.6% |
| Held by funds | 80.3% | 78.3% | +2.0 pts |
| New positions | 160 | 257 | −37.7% |
| Increased | 1,568 | 1,408 | +11.4% |
| Reduced | 1,467 | 1,553 | −5.5% |
| Sold out | 117 | 125 | −6.4% |
| Calls (shares) | 4M | 4.6M | −13.1% |
| Puts (shares) | 5.5M | 7.1M | −22.1% |
| Put/call ratio | 1.36 | 1.52 | −10.5% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in MRK
All superinvestors →
Who owns MRK
share of fund held shares- Index and passive funds40.6%
- Active managers and hedge funds35.0%
- Banks and brokers19.1%
- Pensions, insurers and other5.4%
The top 10 holders own 46.2% of all MRK 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
1,658 funds changed their position- Assenagon Asset Management S.A.Trimmed−3.8M sh
- Mondrian Investment Partners LTDTrimmed−890K sh
- Swedbank ABAdded+732K sh
- Perpetual LtdTrimmed−582K sh
- Cambridge Investment Research Advisors, Inc.Trimmed−500K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 9.20% | 227M | $29.2B | +1.2M |
| 2 | Vanguard Capital Management LLC | 6.54% | 161M | $20.7B | +336K |
| 3 | State Street Corp | 4.88% | 120M | $15.6B | +1.1M |
| 4 | Wellington Management Group LLP | 3.50% | 86.2M | $11.1B | +1.9M |
| 5 | Vanguard Portfolio Management LLC | 2.75% | 67.7M | $8.7B | +435K |
| 6 | Geode Capital Management, LLC | 2.46% | 60.7M | $7.8B | +1.2M |
| 7 | Charles Schwab Investment Management Inc | 2.20% | 54.4M | $7B | +4.6M |
| 8 | Morgan Stanley | 1.97% | 48.6M | $6.3B | +1M |
| 9 | Fmr LLC | 1.84% | 45.4M | $5.8B | +924K |
| 10 | Jpmorgan Chase & Co | 1.78% | 43.9M | $5.7B | −9.1M |
- Norges Bank+37M sh+$4.8B
- Capital International Investors+14.5M sh+$1.9B
- Fisher Asset Management, LLC+12.1M sh+$1.6B
- Assenagon Asset Management S.A.+4.7M sh+$599M
- Charles Schwab Investment Management Inc+4.6M sh+$591M
- Franklin Resources Inc+3.3M sh+$422M
- Dimensional Fund Advisors LP+2M sh+$261M
- Goldman Sachs Group Inc+1.9M sh+$250M
- Jpmorgan Chase & Co−9.1M sh−$1.2B
- Nordea Investment Management AB−5M sh−$638M
- Price T Rowe Associates Inc /md/−4.5M sh−$581M
- Jennison Associates LLC−3.5M sh−$452M
- Invesco Ltd.−3.2M sh−$417M
- Marshall Wace, LLP−2.8M sh−$334M
- Diamant Asset Management, Inc.−2.1M sh−$264M
- California Public Employees Retirement System−2M sh−$255M
MRK institutional ownership FAQ
Who owns the most MRK stock?
In Q2 2026 13F filings the largest holder of MRK was BlackRock, Inc., followed by Vanguard Capital Management LLC and State Street Corp. Index fund managers are usually the biggest holders of large companies.
What percentage of MRK is owned by institutions?
Funds that file 13F reports held 80.3% of MRK's shares at Jun 30, 2026, compared with 78.3% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying MRK?
In Q2 2026, 1,728 funds bought MRK (160 of them new positions) and 1,584 sold (117 sold out completely). Among well known investors, 1 added and 3 cut. Our fund sentiment for MRK is neutral.
What is MRK's institutional put/call ratio?
Funds reported $705M of MRK puts against $518M of calls, a put/call ratio of 1.36 (1.52 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this MRK 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.