Merck & Co.MRK
13F holders, Q3 2025 (September 30)3,311holders −15
155new positions
146sold out
14famous investors
$83.91avg. 13F price*
At the end of Q3 2025, 3,311 institutions reported holding Merck & Co. Inc. (MRK) in their 13F filings, down 15 from Q2 2025. 155 opened new positions and 146 sold out. The largest holders were Vanguard Group Inc. ($21.2B), BlackRock, Inc. ($18.0B) and State Street Corp. ($10.0B). 14 famous investors held it, including Jeremy Grantham (1.6% of GMO's portfolio), Bill Nygren (1.3% of Harris Associates (Oakmark Funds)'s portfolio) and Ken Fisher (0.7% 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 Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 155 | $472.2M |
| Exits | 146 | $271.4M |
All 13F filers, Q2 2025 → Q3 2025: 69,255,310 shares bought and 100,655,209 shares sold, net −31,399,899 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 3,311 holders
| Vanguard Group Inc. | 0.32% | Reduce -0.3% | 252,136,910 | $21.2B |
| BlackRock, Inc. | 0.32% | Reduce -1.6% | 214,876,600 | $18.0B |
| State Street Corp. | 0.35% | Reduce -0.3% | 118,180,178 | $10.0B |
| Wellington Management Group LLP | 1.11% | Reduce -2.0% | 75,279,104 | $6.3B |
| Geode Capital Management, LLC | 0.32% | Add +1.4% | 59,798,874 | $5.0B |
| Charles Schwab Investment Management Inc. | 0.72% | Reduce -0.3% | 53,699,460 | $4.5B |
| Morgan Stanley | 0.23% | Add +0.9% | 44,586,535 | $3.7B |
| JPMorgan Chase & Co. | 0.19% | Add +10.6% | 35,201,647 | $3.0B |
| FMR LLC | 0.15% | Add +5.9% | 33,426,750 | $2.8B |
| Northern Trust Corp. | 0.30% | Reduce -2.8% | 27,933,141 | $2.3B |
| Bank of America Corp. | 0.17% | Reduce -5.6% | 26,449,436 | $2.2B |
| Fisher Asset Management | 0.73% | Reduce -3.8% | 24,068,126 | $2.0B |
| Bank of New York Mellon Corp | 0.33% | Reduce -0.9% | 21,794,354 | $1.8B |
| Legal & General Group Plc | 0.39% | Add +5.9% | 20,659,157 | $1.7B |
| Invesco Ltd. | 0.26% | Add +16.6% | 19,844,936 | $1.7B |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.36% | Reduce -21.4% | 19,749,865 | $1.7B |
| Arrowstreet Capital, Limited Partnership | 0.99% | Reduce -3.8% | 18,708,703 | $1.6B |
| UBS Group AG | 0.28% | Add +0.0% | 16,906,008 | $1.4B |
| Deutsche Bank AG | 0.47% | Reduce -1.1% | 16,846,361 | $1.4B |
| Franklin Resources Inc. | 0.36% | Reduce -38.0% | 16,746,990 | $1.4B |
| Amundi | 0.43% | Reduce -8.0% | 15,214,187 | $1.4B |
| Ameriprise Financial Inc. | 0.31% | Add +20.7% | 15,933,909 | $1.3B |
| Goldman Sachs Group Inc. | 0.18% | Reduce -18.3% | 15,021,367 | $1.3B |
| State Farm Mutual Automobile Insurance Co. | 0.97% | No change | 13,794,969 | $1.2B |
| T. Rowe Price Associates Inc. | 0.12% | Add +26.0% | 13,601,321 | $1.1B |
| Royal Bank of Canada | 0.19% | Reduce -5.5% | 12,808,343 | $1.1B |
| Dimensional Fund Advisors LP | 0.20% | Add +2.4% | 10,877,574 | $912.5M |
| Wells Fargo & Company | 0.18% | Reduce -8.2% | 10,448,560 | $876.9M |
| Nordea Investment Management AB | 0.77% | Add +1.9% | 10,945,187 | $876.6M |
| AQR Capital Management | 0.55% | Add +21.3% | 10,658,099 | $851.4M |
| Harris Associates (Oakmark Funds) | 1.32% | Add +7.6% | 9,823,608 | $824.5M |
| Stifel Financial Corp. | 0.67% | Add +12.4% | 8,720,884 | $731.9M |
| HSBC Holdings PLC | 0.42% | Add +7.7% | 8,387,858 | $701.9M |
| Swedbank AB | 0.71% | Add +6.0% | 8,344,126 | $700.3M |
| Alliancebernstein L.P. | 0.22% | Reduce -7.0% | 8,229,793 | $690.7M |
| PNC Financial Services Group, Inc. | 0.40% | Add +1.9% | 7,867,962 | $660.4M |
| Aristotle Capital Management, LLC | 1.27% | Reduce -3.9% | 7,817,938 | $656.2M |
| California Public Employees Retirement System | 0.38% | Reduce -1.4% | 7,566,306 | $635.0M |
| Massachusetts Financial Services Co. | 0.20% | Reduce -1.7% | 7,549,020 | $633.6M |
| Barclays PLC | 0.24% | Add +27.4% | 7,512,887 | $630.6M |
| Barrow Hanley Mewhinney & Strauss LLC | 1.98% | Reduce -14.8% | 7,415,270 | $622.4M |
| Sumitomo Mitsui Trust Group, Inc. | 0.36% | Reduce -0.9% | 7,366,188 | $618.2M |
| Swiss National Bank | 0.35% | Reduce -5.0% | 7,238,251 | $607.5M |
| Lazard Asset Management LLC | 0.80% | Add +6.9% | 7,063,672 | $592.9M |
| Raymond James Financial Inc. | 0.19% | Reduce -8.3% | 7,007,453 | $588.1M |
| Nuveen, LLC | 0.15% | Reduce -13.8% | 6,908,110 | $579.8M |
| GMO | 1.57% | Add +2.4% | 6,625,350 | $556.1M |
| BNP Paribas Financial Markets | 0.38% | Reduce -13.8% | 5,730,421 | $481.0M |
| National Pension Service | 0.37% | Add +3.2% | 5,707,385 | $479.0M |
| Assenagon Asset Management S.A. | 0.68% | Add +192.7% | 5,496,664 | $461.3M |
| Bank of Montreal | 0.19% | Add +15.4% | 5,398,269 | $453.1M |
| Van Eck Associates Corp. | 0.42% | Add +61.6% | 5,325,033 | $446.9M |
| LSV Asset Management | 0.98% | Reduce -0.7% | 5,299,273 | $444.8M |
| Pacer Advisors, Inc. | 1.15% | Reduce -13.3% | 5,237,153 | $439.6M |
| Principal Financial Group Inc. | 0.22% | Reduce -7.5% | 5,209,360 | $437.2M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.31% | Add +3.9% | 5,172,952 | $434.4M |
| DekaBank Deutsche Girozentrale | 0.71% | No change | 5,427,912 | $424.7M |
| First Trust Advisors LP | 0.31% | Reduce -0.8% | 5,011,611 | $420.6M |
| Clearbridge Investments, LLC | 0.31% | Add +1.6% | 4,970,487 | $417.2M |
| Beutel, Goodman & Co Ltd. | 2.45% | Reduce -4.9% | 4,852,678 | $407.3M |
| Caisse de depot et placement du Quebec | 0.72% | Add +7.8% | 4,767,070 | $400.1M |
| Victory Capital Management Inc. | 0.23% | Add +6.8% | 4,733,323 | $397.3M |
| American Century Companies Inc. | 0.20% | Add +20.9% | 4,559,640 | $382.7M |
| Citigroup Inc. | 0.26% | Reduce -11.5% | 4,522,390 | $379.6M |
| Aberdeen Group plc | 0.57% | Reduce -1.0% | 4,479,623 | $363.0M |
| Rhumbline Advisers | 0.28% | Reduce -0.2% | 4,100,358 | $344.1M |
| California State Teachers Retirement System | 0.35% | Reduce -0.1% | 4,060,037 | $340.8M |
| HighTower Advisors, LLC | 0.37% | Add +2.7% | 3,869,125 | $324.7M |
| Canada Pension Plan Investment Board | 0.23% | Add +5.8% | 3,848,556 | $323.0M |
| New York State Common Retirement Fund | 0.40% | Add +1.3% | 3,667,999 | $307.9M |
| Prudential Financial Inc. | 0.36% | Reduce -6.5% | 3,580,045 | $300.5M |
| Thornburg Investment Management Inc. | 3.86% | Reduce -25.6% | 3,520,631 | $295.5M |
| D. E. Shaw & Co. | 0.25% | Reduce -66.5% | 3,467,852 | $291.1M |
| CANADA LIFE ASSURANCE Co | 0.42% | Add +1.7% | 3,693,267 | $290.1M |
| Los Angeles Capital Management LLC | 0.97% | Add +39.0% | 3,412,448 | $286.4M |
| Macquarie Group Ltd. | 0.33% | Reduce -2.0% | 3,404,859 | $285.8M |
| Envestnet Asset Management Inc. | 0.08% | Reduce -9.3% | 3,396,041 | $285.0M |
| Capital International Investors | 0.05% | Reduce -16.5% | 3,393,368 | $284.8M |
| Russell Investments Group, Ltd. | 0.32% | Reduce -7.0% | 3,426,693 | $284.2M |
| LPL Financial LLC | 0.08% | Add +1.8% | 3,372,059 | $283.0M |
| Allianz Asset Management GmbH | 0.33% | Add +55.2% | 3,232,938 | $271.3M |
| Royal London Asset Management Ltd. | 0.58% | Reduce -6.1% | 3,199,871 | $268.6M |
| Capital Wealth Planning, LLC | 1.89% | Add +101.1% | 3,191,442 | $267.9M |
| Bank Julius Baer & Co. Ltd, Zurich | 0.72% | Reduce -0.2% | 3,063,051 | $257.1M |
| Smead Capital Management, Inc. | 4.92% | Reduce -7.1% | 3,034,674 | $254.7M |
| Robeco Institutional Asset Management B.V. | 0.37% | Reduce -5.0% | 3,006,132 | $252.3M |
| Aviva PLC | 0.42% | Add +3.3% | 2,772,306 | $232.7M |
| Ensign Peak Advisors, Inc | 0.38% | Reduce -12.1% | 2,772,025 | $232.7M |
| Neuberger Berman Group LLC | 0.16% | Add +110.2% | 2,612,013 | $219.0M |
| Man Group plc | 0.42% | Reduce -12.8% | 2,570,911 | $215.8M |
| Mariner, LLC | 0.27% | Add +1.4% | 2,527,966 | $212.1M |
| Mitsubishi UFJ Trust & Banking Corp | 0.45% | Add +6.2% | 2,450,638 | $205.7M |
| Brandes Investment Partners, LP | 1.63% | Add +26.7% | 2,422,667 | $203.3M |
| Corient Private Wealth LP | 0.32% | Reduce -50.9% | 2,427,066 | $202.7M |
| Fayez Sarofim & Co | 0.47% | Reduce -8.2% | 2,406,322 | $202.0M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.34% | Add +3.4% | 2,405,583 | $201.9M |
| Thrivent Financial for Lutherans | 0.40% | Add +7.1% | 2,379,666 | $199.7M |
| Employees Provident Fund Board | 1.58% | Add +39.4% | 2,354,034 | $197.6M |
| Cullen Capital Management, LLC | 2.15% | Add +2.9% | 2,343,452 | $196.7M |
| Two Sigma Advisers, LP | 0.39% | Reduce -59.1% | 2,320,900 | $194.8M |
"% of holder's portfolio" is MRK's weight in each manager's 13F, not the share of Merck & Co. Inc. the manager owns.