Merck & Co., Inc.
MRK- Exchange
- NYSE
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0000310158
In the last 90 days, Merck & Co., Inc. insiders filed 0 open-market purchases and 7 sales; 3,854 institutions reported holding it in 13F filings for Q2 2026, worth $254.3B in total; 4 superinvestors hold it, including Harris Associates (Oakmark) and Fairfax Financial.
13F holders, Q1 2026
Institutional positions in Merck & Co., Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 3,812
- +195 vs. Q4 2025
- Shares held
- 1.93B
- +269.1M (+16.2%) vs. Q4 2025
- Total value
- $231.9B
- +$56.6B (+32.3%) vs. Q4 2025
- New holders
- 316
- 1,467 more added
- Sold out
- 121
- 1,594 more reduced
57 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MRK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 3,854 | $254.3B |
| Q1 2026 | 3,812 | $231.9B |
| Q4 2025 | 3,674 | $206.6B |
| Q3 2025 | 3,319 | $159.8B |
| Q2 2025 | 3,337 | $155.9B |
| Q1 2025 | 3,459 | $177.7B |
| Q4 2024 | 3,618 | $196.9B |
| Q3 2024 | 3,502 | $221.8B |
| Q2 2024 | 3,558 | $242.3B |
| Q1 2024 | 3,547 | $256.9B |
| Q4 2023 | 3,444 | $211.6B |
| Q3 2023 | 3,222 | $197.7B |
| Q2 2023 | 3,262 | $222.8B |
| Q1 2023 | 3,188 | $205.1B |
| Q4 2022 | 3,244 | $212.2B |
| Q3 2022 | 2,997 | $162.7B |
| Q2 2022 | 3,020 | $171.5B |
| Q1 2022 | 2,962 | $152.1B |
| Q4 2021 | 2,910 | $142.2B |
| Q3 2021 | 2,658 | $138.8B |
| Q2 2021 | 2,684 | $144.3B |
| Q1 2021 | 2,693 | $143.2B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Merck & Co., Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 225,830,330 | $27.2B | 0.48% | +6,734,865+3.1% | Added |
| Vanguard Capital Management LLC | 160,987,624 | $19.4B | 0.48% | +160,987,624 | New |
| State Street Corp | 119,325,673 | $14.5B | 0.50% | −714,495−0.6% | Reduced |
| Wellington Management Group LLP | 84,314,971 | $10.1B | 1.89% | −2,120,487−2.5% | Reduced |
| Vanguard Portfolio Management LLC | 67,304,305 | $8.10B | 0.42% | +67,304,305 | New |
| Geode Capital Management, LLC | 59,558,154 | $7.14B | 0.44% | −489,830−0.8% | Reduced |
| JPMorgan Chase & Co | 52,972,983 | $6.26B | 0.42% | +23,773,005+81.4% | Added |
| Charles Schwab Investment Management Inc | 49,765,225 | $5.99B | 0.91% | +1,201,421+2.5% | Added |
| Morgan Stanley | 47,632,487 | $5.73B | 0.35% | +2,686,466+6.0% | Added |
| FMR LLC | 44,516,010 | $5.35B | 0.28% | +3,679,444+9.0% | Added |
| Bank of America Corp | 30,774,221 | $3.70B | 0.27% | +2,919,780+10.5% | Added |
| Northern Trust Corp | 27,090,023 | $3.26B | 0.43% | −144,619−0.5% | Reduced |
| Fisher Asset Management, LLC | 26,436,284 | $3.18B | 1.08% | +1,562,957+6.3% | Added |
| Price T Rowe Associates Inc | 23,042,842 | $2.77B | 0.32% | +4,289,452+22.9% | Added |
| Invesco Ltd. | 21,855,101 | $2.63B | 0.26% | +1,308,916+6.4% | Added |
| UBS Asset Management Americas Inc | 20,414,819 | $2.46B | 0.51% | +981,416+5.1% | Added |
| Goldman Sachs Group Inc | 20,133,379 | $2.42B | 0.32% | +784,661+4.1% | Added |
| Legal & General Group Plc | 19,538,545 | $2.35B | 0.54% | −238,297−1.2% | Reduced |
| Bank of New York Mellon Corp | 18,713,363 | $2.25B | 0.41% | −451,163−2.4% | Reduced |
| Ameriprise Financial Inc | 16,262,708 | $1.96B | 0.45% | +288,299+1.8% | Added |
| Franklin Resources Inc | 16,267,205 | $1.96B | 0.48% | +203,155+1.3% | Added |
| Dimensional Fund Advisors LP | 15,456,039 | $1.86B | 0.39% | +2,969,856+23.8% | Added |
| Vanguard Fiduciary Trust Co | 13,964,179 | $1.68B | 0.42% | +13,964,179 | New |
| UBS Group AG | 13,933,630 | $1.68B | 0.30% | −5,244,642−27.3% | Reduced |
| State Farm Mutual Automobile Insurance Co | 13,794,969 | $1.66B | 1.31% | 00.0% | Unchanged |
| Amundi | 13,764,954 | $1.66B | 0.45% | +379,861+2.8% | Added |
| Royal Bank of Canada | 13,201,722 | $1.59B | 0.30% | +11,637+0.1% | Added |
| Deutsche Bank AG | 12,540,774 | $1.51B | 0.50% | −247,537−1.9% | Reduced |
| Harris Associates L PSuperinvestorHarris Associates (Oakmark) | 12,366,933 | $1.49B | 1.99% | −1,721,772−12.2% | Reduced |
| Wells Fargo & Company | 11,446,845 | $1.38B | 0.28% | +398,634+3.6% | Added |
| Nuveen, LLC | 10,099,764 | $1.21B | 0.33% | +3,141,695+45.2% | Added |
| Alliancebernstein L.P. | 11,301,486 | $1.19B | 0.39% | +2,669,101+30.9% | Added |
| AQR Capital Management LLC | 8,628,486 | $1.04B | 0.48% | −2,620,877−23.3% | Reduced |
| Nordea Investment Management AB | 8,527,993 | $1.02B | 0.95% | −2,045,828−19.3% | Reduced |
| Stifel Financial Corp | 8,291,826 | $997.4M | 0.92% | −255,243−3.0% | Reduced |
| Barrow Hanley Mewhinney & Strauss LLC | 7,917,866 | $952.4M | 3.12% | +124,690+1.6% | Added |
| HSBC Holdings PLC | 7,634,112 | $918.4M | 0.55% | −441,337−5.5% | Reduced |
| Barclays PLC | 7,557,518 | $909.1M | 0.32% | +2,783,832+58.3% | Added |
| The PNC Financial Services Group, Inc. | 7,530,441 | $905.8M | 0.52% | −91,391−1.2% | Reduced |
| California Public Employees Retirement System | 7,383,088 | $888.1M | 0.55% | −1,185,318−13.8% | Reduced |
| Swiss National Bank | 7,284,151 | $876.2M | 0.50% | +440,700+6.4% | Added |
| Swedbank AB | 7,091,711 | $853.1M | 0.90% | −559,960−7.3% | Reduced |
| Grantham, Mayo, Van Otterloo & Co. LLC | 7,013,777 | $843.7M | 2.16% | +143,632+2.1% | Added |
| Aristotle Capital Management, LLC | 6,894,432 | $829.3M | 1.74% | −386,461−5.3% | Reduced |
| Raymond James Financial Inc | 6,585,514 | $791.9M | 0.24% | −343,142−5.0% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 6,269,316 | $754.1M | 0.49% | −702,485−10.1% | Reduced |
| Jennison Associates LLC | 6,249,337 | $751.7M | 0.52% | +689,849+12.4% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 5,782,329 | $695.6M | 0.47% | +370,900+6.9% | Added |
| National Pension Service | 5,762,086 | $693.1M | 0.53% | −27,338−0.5% | Reduced |
| Vanguard Global Advisers, LLC | 5,585,694 | $671.9M | 0.36% | +5,585,694 | New |
| American Century Companies Inc | 5,547,858 | $667.4M | 0.34% | +179,248+3.3% | Added |
| DekaBank Deutsche Girozentrale | 5,427,912 | $651.9M | 1.08% | 00.0% | Unchanged |
| Voya Investment Management LLC | 5,159,124 | $620.6M | 0.65% | +2,172,653+72.7% | Added |
| LSV Asset Management | 5,088,709 | $612.1M | 1.32% | −85,724−1.7% | Reduced |
| Vanguard Asset Management, Ltd | 5,003,623 | $601.9M | 0.51% | +5,003,623 | New |
| Bank of Montreal | 4,831,161 | $581.1M | 0.25% | −541,040−10.1% | Reduced |
| Principal Financial Group Inc | 4,709,942 | $566.6M | 0.30% | −372,776−7.3% | Reduced |
| Standard Life Aberdeen plc | 4,665,193 | $561.2M | 0.91% | +14,191+0.3% | Added |
| Capital Wealth Planning, LLC | 4,516,730 | $543.3M | 3.00% | −487,467−9.7% | Reduced |
| First Trust Advisors LP | 4,465,569 | $537.2M | 0.38% | −162,791−3.5% | Reduced |
| Acadian Asset Management LLC | 4,202,381 | $505.5M | 0.72% | +2,607,712+163.5% | Added |
| Allianz Asset Management GmbH | 3,964,890 | $476.9M | 0.55% | −1,9360.0% | Reduced |
| Envestnet Asset Management Inc | 3,852,976 | $463.5M | 0.12% | +648,636+20.2% | Added |
| California State Teachers Retirement System | 3,835,612 | $461.4M | 0.49% | −110,513−2.8% | Reduced |
| Citadel Advisors LLC | 3,821,227 | $459.7M | 0.33% | −3,000,104−44.0% | Reduced |
| Caisse de Depot Et Placement du Quebec | 3,799,379 | $457.0M | 0.73% | −332,079−8.0% | Reduced |
| Rhumbline Advisers | 3,797,430 | $456.8M | 0.39% | −178,839−4.5% | Reduced |
| Victory Capital Management Inc | 3,789,757 | $455.9M | 0.29% | −1,018,770−21.2% | Reduced |
| LPL Financial LLC | 3,782,188 | $455.0M | 0.12% | +226,190+6.4% | Added |
| Thornburg Investment Management Inc | 3,728,673 | $448.5M | 4.66% | 00.0% | Unchanged |
| Bank Julius Baer & Co. Ltd, Zurich | 3,700,222 | $443.3M | 1.34% | +536,891+17.0% | Added |
| HighTower Advisors, LLC | 3,635,404 | $437.3M | 0.46% | −182,731−4.8% | Reduced |
| Canada Pension Plan Investment Board | 3,616,870 | $435.1M | 0.28% | −697,729−16.2% | Reduced |
| New York State Common Retirement Fund | 3,516,025 | $422.9M | 0.59% | −40,033−1.1% | Reduced |
| D. E. Shaw & Co., Inc. | 3,397,582 | $408.7M | 0.32% | −120,882−3.4% | Reduced |
| Neuberger Berman Group LLC | 3,280,851 | $394.6M | 0.30% | +240,953+7.9% | Added |
| Lazard Asset Management LLC | 3,254,331 | $391.5M | 0.64% | −1,152,710−26.2% | Reduced |
| Aviva PLC | 3,236,573 | $389.3M | 0.65% | +349,219+12.1% | Added |
| Beutel, Goodman & Co Ltd. | 3,029,891 | $364.5M | 2.47% | −1,032,502−25.4% | Reduced |
| Federated Hermes, Inc. | 3,008,096 | $361.8M | 0.59% | +516,058+20.7% | Added |
| Great West Life Assurance Co | 2,974,102 | $358.9M | 0.64% | +3,729+0.1% | Added |
| Natixis Advisors, L.P. | 2,970,290 | $357.3M | 0.50% | +442,713+17.5% | Added |
| Arrowstreet Capital, Limited Partnership | 2,936,330 | $353.2M | 0.19% | −7,007,793−70.5% | Reduced |
| Royal London Asset Management Ltd | 2,896,154 | $348.4M | 0.73% | −300,997−9.4% | Reduced |
| Janus Henderson Group PLC | 2,880,199 | $346.5M | 0.17% | +995,059+52.8% | Added |
| Eurizon Capital SGR S.p.A. | 2,822,423 | $338.5M | 1.06% | +311,350+12.4% | Added |
| Mariner, LLC | 2,795,221 | $336.2M | 0.39% | +41,991+1.5% | Added |
| Citigroup Inc | 2,779,106 | $334.3M | 0.21% | +142,995+5.4% | Added |
| Marshall Wace, LLP | 2,778,301 | $334.2M | 0.36% | −1,191,168−30.0% | Reduced |
| Adage Capital Partners GP, L.L.C. | 2,687,439 | $323.3M | 0.50% | −4110.0% | Reduced |
| Jones Financial Companies LLLP | 2,659,381 | $318.2M | 0.15% | +1,779,735+202.3% | Added |
| Ensign Peak Advisors, Inc | 2,613,009 | $314.3M | 0.59% | +774,766+42.1% | Added |
| Mackenzie Financial Corp | 2,517,435 | $302.8M | 0.36% | +1,052,450+71.8% | Added |
| Russell Investments Group, Ltd. | 2,526,631 | $301.9M | 0.32% | −685,244−21.3% | Reduced |
| Smead Capital Management, Inc. | 2,471,398 | $297.3M | 6.47% | −366,902−12.9% | Reduced |
| CI Private Wealth, LLC | 2,428,276 | $291.2M | 0.42% | −4,964−0.2% | Reduced |
| Thrivent Financial for Lutherans | 2,351,669 | $282.9M | 0.54% | −55,723−2.3% | Reduced |
| Robeco Institutional Asset Management B.V. | 2,322,293 | $279.3M | 0.40% | −175,682−7.0% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2,316,095 | $278.6M | 0.32% | −338,405−12.7% | Reduced |
| Alyeska Investment Group, L.P. | 2,305,574 | $277.3M | 0.78% | +728,862+46.2% | Added |