Merck & Co.MRK
13F holders, Q1 2026 (March 31)3,805holders +138
256new positions
118sold out
14famous investors
$120.02avg. 13F price*
At the end of Q1 2026, 3,805 institutions reported holding Merck & Co. Inc. (MRK) in their 13F filings, up 138 from Q4 2025. 256 opened new positions and 118 sold out. The largest holders were BlackRock, Inc. ($27.2B), Vanguard Capital Management LLC ($19.4B) and State Street Corp. ($14.5B). 14 famous investors held it, including Jeremy Grantham (2.2% of GMO's portfolio), Bill Nygren (2.0% of Harris Associates (Oakmark Funds)'s portfolio) and Ken Fisher (1.1% of Fisher Asset Management's portfolio).
- Company
- Merck & Co. Inc.
- Sector
- Health Care
- CUSIP
- 58933Y105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 256 | $689.2M |
| Exits | 118 | $673.9M |
All 13F filers, Q4 2025 → Q1 2026: 103,546,481 shares bought and 92,108,021 shares sold, net +11,438,460 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 3,805 holders
| BlackRock, Inc. | 0.48% | Add +3.1% | 225,830,330 | $27.2B |
| Vanguard Capital Management LLC | 0.48% | — | 160,987,624 | $19.4B |
| State Street Corp. | 0.50% | Reduce -0.6% | 119,325,673 | $14.5B |
| Wellington Management Group LLP | 1.90% | Reduce -2.5% | 84,314,971 | $10.1B |
| Vanguard Portfolio Management LLC | 0.42% | — | 67,304,305 | $8.1B |
| Geode Capital Management, LLC | 0.44% | Reduce -0.8% | 59,558,154 | $7.1B |
| JPMorgan Chase & Co. | 0.43% | Add +81.4% | 52,972,983 | $6.3B |
| Charles Schwab Investment Management Inc. | 0.91% | Add +2.5% | 49,765,225 | $6.0B |
| Morgan Stanley | 0.35% | Add +6.0% | 47,632,487 | $5.7B |
| FMR LLC | 0.28% | Add +9.0% | 44,516,010 | $5.4B |
| Bank of America Corp. | 0.27% | Add +10.5% | 30,774,221 | $3.7B |
| Northern Trust Corp. | 0.43% | Reduce -0.5% | 27,090,023 | $3.3B |
| Fisher Asset Management | 1.08% | Add +6.3% | 26,436,284 | $3.2B |
| T. Rowe Price Associates Inc. | 0.32% | Add +22.9% | 23,042,842 | $2.8B |
| Invesco Ltd. | 0.26% | Add +6.4% | 21,855,101 | $2.6B |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.51% | Add +5.0% | 20,414,819 | $2.5B |
| Goldman Sachs Group Inc. | 0.32% | Add +4.1% | 20,133,379 | $2.4B |
| Legal & General Group Plc | 0.54% | Reduce -1.2% | 19,538,545 | $2.4B |
| Bank of New York Mellon Corp | 0.41% | Reduce -2.4% | 18,713,363 | $2.3B |
| Ameriprise Financial Inc. | 0.46% | Add +1.8% | 16,262,708 | $2.0B |
| Franklin Resources Inc. | 0.49% | Add +1.3% | 16,267,205 | $2.0B |
| Dimensional Fund Advisors LP | 0.39% | Add +23.8% | 15,456,039 | $1.9B |
| Vanguard Fiduciary Trust Co. | 0.42% | — | 13,964,179 | $1.7B |
| UBS Group AG | 0.30% | Reduce -27.4% | 13,933,630 | $1.7B |
| State Farm Mutual Automobile Insurance Co. | 1.31% | No change | 13,794,969 | $1.7B |
| Amundi | 0.45% | Add +2.8% | 13,764,954 | $1.7B |
| Royal Bank of Canada | 0.30% | Add +0.1% | 13,201,722 | $1.6B |
| Deutsche Bank AG | 0.50% | Reduce -1.9% | 12,540,774 | $1.5B |
| Harris Associates (Oakmark Funds) | 1.99% | Reduce -12.2% | 12,366,933 | $1.5B |
| Wells Fargo & Company | 0.28% | Add +3.6% | 11,446,845 | $1.4B |
| Nuveen, LLC | 0.33% | Add +45.1% | 10,099,764 | $1.2B |
| Alliancebernstein L.P. | 0.39% | Add +30.9% | 11,301,486 | $1.2B |
| AQR Capital Management | 0.48% | Reduce -23.3% | 8,628,486 | $1.0B |
| Nordea Investment Management AB | 0.95% | Reduce -19.4% | 8,527,993 | $1.0B |
| Stifel Financial Corp. | 0.92% | Reduce -3.0% | 8,291,826 | $997.4M |
| Barrow Hanley Mewhinney & Strauss LLC | 3.12% | Add +1.6% | 7,917,866 | $952.4M |
| HSBC Holdings PLC | 0.55% | Reduce -5.5% | 7,634,112 | $918.4M |
| Barclays PLC | 0.33% | Add +58.3% | 7,557,518 | $909.1M |
| PNC Financial Services Group, Inc. | 0.52% | Reduce -1.2% | 7,530,441 | $905.8M |
| California Public Employees Retirement System | 0.55% | Reduce -13.8% | 7,383,088 | $888.1M |
| Swiss National Bank | 0.50% | Add +6.4% | 7,284,151 | $876.2M |
| Swedbank AB | 0.90% | Reduce -7.3% | 7,091,711 | $853.1M |
| GMO | 2.16% | Add +2.1% | 7,013,777 | $843.7M |
| Aristotle Capital Management, LLC | 1.74% | Reduce -5.3% | 6,894,432 | $829.3M |
| Raymond James Financial Inc. | 0.24% | Reduce -5.0% | 6,585,514 | $791.9M |
| Sumitomo Mitsui Trust Group, Inc. | 0.49% | Reduce -10.1% | 6,269,316 | $754.1M |
| Jennison Associates LLC | 0.52% | Add +12.4% | 6,249,337 | $751.7M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.47% | Add +6.8% | 5,782,329 | $695.6M |
| National Pension Service | 0.53% | Reduce -0.5% | 5,762,086 | $693.1M |
| Vanguard Global Advisers, LLC | 0.36% | — | 5,585,694 | $671.9M |
| American Century Companies Inc. | 0.34% | Add +3.3% | 5,547,858 | $667.4M |
| DekaBank Deutsche Girozentrale | 1.08% | No change | 5,427,912 | $651.9M |
| Voya Investment Management LLC | 0.74% | Add +72.8% | 5,159,124 | $620.6M |
| LSV Asset Management | 1.32% | Reduce -1.7% | 5,088,709 | $612.1M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.51% | — | 5,003,623 | $601.9M |
| Bank of Montreal | 0.24% | Reduce -10.1% | 4,831,161 | $581.1M |
| Principal Financial Group Inc. | 0.30% | Reduce -7.3% | 4,709,942 | $566.6M |
| Aberdeen Group plc | 0.91% | Add +0.3% | 4,665,193 | $561.2M |
| Capital Wealth Planning, LLC | 3.00% | Reduce -9.7% | 4,516,730 | $543.3M |
| First Trust Advisors LP | 0.38% | Reduce -3.5% | 4,465,569 | $537.2M |
| Acadian Asset Management LLC | 0.72% | Add +163.5% | 4,202,381 | $505.5M |
| Allianz Asset Management GmbH | 0.55% | Reduce -0.1% | 3,964,890 | $476.9M |
| Envestnet Asset Management Inc. | 0.12% | Add +20.2% | 3,852,976 | $463.5M |
| California State Teachers Retirement System | 0.49% | Reduce -2.8% | 3,835,612 | $461.4M |
| Citadel Advisors | 0.33% | Reduce -44.0% | 3,821,227 | $459.7M |
| Caisse de depot et placement du Quebec | 0.73% | Reduce -8.0% | 3,799,379 | $457.0M |
| Rhumbline Advisers | 0.39% | Reduce -4.5% | 3,797,430 | $456.8M |
| Victory Capital Management Inc. | 0.29% | Reduce -21.2% | 3,789,757 | $455.9M |
| LPL Financial LLC | 0.12% | Add +6.4% | 3,782,188 | $455.0M |
| Thornburg Investment Management Inc. | 4.66% | No change | 3,728,673 | $448.5M |
| Bank Julius Baer & Co. Ltd, Zurich | 1.34% | Add +17.0% | 3,700,222 | $443.3M |
| HighTower Advisors, LLC | 0.46% | Reduce -4.8% | 3,635,404 | $437.3M |
| Canada Pension Plan Investment Board | 0.28% | Reduce -16.2% | 3,616,870 | $435.1M |
| New York State Common Retirement Fund | 0.59% | Reduce -1.1% | 3,516,025 | $422.9M |
| D. E. Shaw & Co. | 0.35% | Reduce -3.4% | 3,397,582 | $408.7M |
| Neuberger Berman Group LLC | 0.30% | Add +7.9% | 3,280,851 | $394.6M |
| Lazard Asset Management LLC | 0.65% | Reduce -26.2% | 3,254,331 | $391.5M |
| Aviva PLC | 0.65% | Add +12.1% | 3,236,573 | $389.3M |
| Beutel, Goodman & Co Ltd. | 2.47% | Reduce -25.4% | 3,029,891 | $364.5M |
| Federated Hermes, Inc. | 0.59% | Add +20.7% | 3,008,096 | $361.8M |
| CANADA LIFE ASSURANCE Co | 0.64% | Add +0.1% | 2,974,102 | $358.9M |
| Natixis Advisors, LLC | 0.50% | Add +17.5% | 2,970,290 | $357.3M |
| Arrowstreet Capital, Limited Partnership | 0.19% | Reduce -70.5% | 2,936,330 | $353.2M |
| Royal London Asset Management Ltd. | 0.73% | Reduce -9.4% | 2,896,154 | $348.4M |
| Janus Henderson Group PLC | 0.17% | Add +52.8% | 2,880,199 | $346.5M |
| Eurizon Capital SGR S.p.A. | 1.06% | Add +12.4% | 2,822,423 | $338.5M |
| Mariner, LLC | 0.39% | Add +1.5% | 2,795,221 | $336.2M |
| Citigroup Inc. | 0.21% | Add +5.4% | 2,779,106 | $334.3M |
| Marshall Wace, LLP | 0.36% | Reduce -30.0% | 2,778,301 | $334.2M |
| Adage Capital Partners Gp, L.L.C. | 0.50% | Reduce -0.0% | 2,687,439 | $323.3M |
| Jones Financial Companies LLLP | 0.15% | Add +202.3% | 2,659,381 | $318.2M |
| Ensign Peak Advisors, Inc | 0.59% | Add +42.1% | 2,613,009 | $314.3M |
| Mackenzie Financial Corp. | 0.36% | Add +71.8% | 2,517,435 | $302.8M |
| Russell Investments Group, Ltd. | 0.33% | Reduce -21.3% | 2,526,631 | $301.9M |
| Smead Capital Management, Inc. | 6.48% | Reduce -12.9% | 2,471,398 | $297.3M |
| Corient Private Wealth LP | 0.42% | Reduce -0.2% | 2,428,276 | $291.2M |
| Thrivent Financial for Lutherans | 0.55% | Reduce -2.3% | 2,351,669 | $282.9M |
| Robeco Institutional Asset Management B.V. | 0.40% | Reduce -7.0% | 2,322,293 | $279.3M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.32% | Reduce -12.8% | 2,316,095 | $278.6M |
| Alyeska Investment Group, L.P. | 0.78% | Add +46.2% | 2,305,574 | $277.3M |
"% of holder's portfolio" is MRK's weight in each manager's 13F, not the share of Merck & Co. Inc. the manager owns.