Who owns MRK
Institutions that file 13Fs hold 80% of the shares
Shares they hold, quarter on quarter
+2.6%
210 new, 1393 added, 1309 cut, 182 sold out
Top 10 holders
46%
of the shares institutions hold
A 13F lists the long positions of managers with more than $100M in US stocks. It shows the last day of a quarter and is filed up to 45 days later. Two managers can report the same shares, so totals can count some shares twice.
Institutional owners
The 25 biggest holders
| Holder | Shares | Value | % of company | From Mar 31, 2026 |
|---|---|---|---|---|
| BlackRock, Inc. | 227.00M | $29.2B | 9.21% | Added +0.5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 161.32M | $20.7B | 6.54% | Held |
| STATE STREET CORP | 120.41M | $15.6B | 4.88% | Added +0.9% |
| WELLINGTON MANAGEMENT GROUP LLP | 86.25M | $11.1B | 3.50% | Added +2.3% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 67.74M | $8.7B | 2.75% | Added +0.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 60.74M | $7.8B | 2.46% | Added +2.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 54.37M | $7.0B | 2.21% | Added +9.2% |
| MORGAN STANLEY | 48.64M | $6.3B | 1.97% | Added +2.1% |
| FMR LLC | 45.44M | $5.8B | 1.84% | Added +2.1% |
| JPMORGAN CHASE & CO | 43.89M | $5.7B | 1.78% | Reduced -17.2% |
| Fisher Asset Management, LLC | 38.52M | $4.9B | 1.56% | Added +45.7% |
| NORGES BANK | 36.98M | $4.8B | 1.50% | New |
| BANK OF AMERICA CORP /DE/ | 30.54M | $3.9B | 1.24% | Reduced -0.8% |
| NORTHERN TRUST CORP | 26.28M | $3.4B | 1.07% | Reduced -3.0% |
| GOLDMAN SACHS GROUP INC | 22.08M | $2.8B | 0.90% | Added +9.6% |
| FRANKLIN RESOURCES INC | 19.55M | $2.5B | 0.79% | Added +20.2% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 19.55M | $2.5B | 0.79% | Reduced -4.3% |
| Legal & General Group Plc | 18.87M | $2.4B | 0.77% | Reduced -3.4% |
| Invesco Ltd. | 18.61M | $2.4B | 0.75% | Reduced -14.8% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 18.52M | $2.4M | 0.75% | Reduced -19.6% |
| Bank of New York Mellon Corp | 18.34M | $2.4B | 0.74% | Reduced -2.0% |
| DIMENSIONAL FUND ADVISORS LP | 17.49M | $2.2B | 0.71% | Added +13.1% |
| AMERIPRISE FINANCIAL INC | 17.39M | $2.2B | 0.71% | Added +6.9% |
| Capital International Investors | 15.39M | $2.0B | 0.62% | Added ×18 |
| ROYAL BANK OF CANADA | 14.29M | $1.8B | 0.58% | Added +8.3% |
Show the other 15 holders
This quarter
Who bought and who sold the most shares
Bought the most shares
- NORGES BANK +36.98M, new
- Capital International Investors +14.52M
- Fisher Asset Management, LLC +12.08M
- Assenagon Asset Management S.A. +4.66M
- CHARLES SCHWAB INVESTMENT MANAGEMENT INC +4.60M
- Jupiter Topco LLC +3.90M, new
- FRANKLIN RESOURCES INC +3.28M
- DIMENSIONAL FUND ADVISORS LP +2.03M
- GOLDMAN SACHS GROUP INC +1.94M
- WELLINGTON MANAGEMENT GROUP LLP +1.93M
Sold the most shares
- JPMORGAN CHASE & CO -9.09M
- NORDEA INVESTMENT MANAGEMENT AB -5.02M
- PRICE T ROWE ASSOCIATES INC /MD/ -4.52M
- JENNISON ASSOCIATES LLC -3.52M
- Invesco Ltd. -3.24M
- JANUS HENDERSON GROUP PLC -2.88M, sold out
- MARSHALL WACE, LLP -2.78M, sold out
- DIAMANT ASSET MANAGEMENT, INC. -2.05M
- California Public Employees Retirement System -1.98M
- CITADEL ADVISORS LLC -1.89M
Superinvestors
Superinvestors holding MRK
| Investor | Quarter | Shares | Value | % of portfolio | Last quarter |
|---|---|---|---|---|---|
| Bill Nygren Harris Associates (Oakmark) | Jun 30, 2026 | 12.07M | $1.6B | 2.08% | Reduced -2.4% |
| Dodge & Cox Dodge & Cox | Jun 30, 2026 | 136K | $17.4M | 0.01% | Held |
| Christopher Bloomstran Semper Augustus Investments | Jun 30, 2026 | 45K | $5.7M | 0.65% | Held |
| Thomas Russo Gardner Russo & Quinn | Jun 30, 2026 | 2K | $211K | 0.00% | Reduced -23.3% |
More than 5%
13D filings: owners who may push for change
No Schedule 13D about MRK in the last year.