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; 3,855 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, Q4 2025
Institutional positions in Merck & Co., Inc. as of Dec 31, 2025. 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
- 3,674
- +428 vs. Q3 2025
- Shares held
- 1.96B
- +60.6M (+3.2%) vs. Q3 2025
- Total value
- $206.6B
- +$47.2B (+29.6%) vs. Q3 2025
- New holders
- 555
- 1,379 more added
- Sold out
- 127
- 1,404 more reduced
73 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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 | 3,855 | $254.3B |
| Q1 2026 | 3,813 | $231.9B |
| Q4 2025 | 3,675 | $206.6B |
| Q3 2025 | 3,320 | $159.8B |
| Q2 2025 | 3,338 | $155.9B |
| Q1 2025 | 3,460 | $177.7B |
| Q4 2024 | 3,619 | $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, Q4 2025
Shares, value and share of portfolio for each institution holding Merck & Co., Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Groupama Asset Managment | 900,786 | $94.8M | 1.39% | +68,181+8.2% | Added |
| Holocene Advisors, LP | 885,760 | $93.2M | 0.20% | +239,749+37.1% | Added |
| Jones Financial Companies LLLP | 879,646 | $92.6M | 0.06% | +41,110+4.9% | Added |
| Resona Asset Management Co.,Ltd. | 871,679 | $91.9M | 0.44% | −65,118−7.0% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 867,929 | $91.4M | 0.45% | +11,186+1.3% | Added |
| Capital International Investors | 860,735 | $90.6M | 0.01% | −2,532,633−74.6% | Reduced |
| State of New Jersey Common Pension Fund D | 860,235 | $90.5M | 0.33% | −18,294−2.1% | Reduced |
| Blair William & Co | 834,024 | $87.8M | 0.24% | +21,658+2.7% | Added |
| Keybank National Association | 830,095 | $87.4M | 0.31% | −6,845−0.8% | Reduced |
| Compagnie Lombard Odier SCmA | 827,676 | $87.1M | 0.95% | +134,772+19.5% | Added |
| Advisor Group Holdings, Inc. | 808,566 | $85.2M | 0.12% | −93,393−10.4% | Reduced |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 797,029 | $83.9M | 0.70% | −127,100−13.8% | Reduced |
| Forsta Ap-Fonden | 792,700 | $83.4M | 0.50% | −39,100−4.7% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 791,735 | $83.3M | 1.29% | 00.0% | Unchanged |
| ING Groep NV | 786,498 | $82.8M | 0.50% | −69,433−8.1% | Reduced |
| TCW Group Inc | 783,817 | $82.5M | 0.59% | +289,732+58.6% | Added |
| Teacher Retirement System of Texas | 777,967 | $81.9M | 0.28% | −85,347−9.9% | Reduced |
| Donaldson Capital Management, LLC | 777,961 | $81.9M | 2.60% | −8,922−1.1% | Reduced |
| PBU - The Pension Fund of Early Childhood & Youth Educators | 775,966 | $81.7M | 1.18% | +775,966 | New |
| Mercer Global Advisors Inc | 775,210 | $81.6M | 0.12% | +59,159+8.3% | Added |
| Vestal Point Capital, LP | 775,000 | $81.6M | 2.99% | +775,000 | New |
| Guggenheim Capital LLC | 773,718 | $81.4M | 0.60% | +59,725+8.4% | Added |
| Midwest Trust Co | 766,971 | $80.7M | 1.01% | +7,847+1.0% | Added |
| Bahl & Gaynor Inc | 764,839 | $80.5M | 0.41% | −265,002−25.7% | Reduced |
| Ferguson Wellman Capital Management, Inc | 760,650 | $80.1M | 1.28% | +13,069+1.7% | Added |
| First Financial Bankshares Inc | 728,519 | $76.7M | 1.54% | +7,509+1.0% | Added |
| State of Michigan Retirement System | 724,490 | $76.3M | 0.37% | −13,300−1.8% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 723,049 | $76.1M | 0.60% | +127,608+21.4% | Added |
| CIBC Asset Management Inc | 720,718 | $75.9M | 0.18% | +245,419+51.6% | Added |
| Calamos Advisors LLC | 719,806 | $75.8M | 0.31% | +209,606+41.1% | Added |
| Nisa Investment Advisors, LLC | 711,119 | $75.4M | 0.25% | +27,207+4.0% | Added |
| Epoch Investment Partners, Inc. | 710,451 | $74.8M | 0.42% | +17,339+2.5% | Added |
| Tredje AP-fonden | 709,260 | $74.7M | 0.56% | +78,195+12.4% | Added |
| Old Republic International Corporation | 705,600 | $74.3M | 3.00% | 00.0% | Unchanged |
| Panagora Asset Management Inc | 705,442 | $74.3M | 0.26% | +567,249+410.5% | Added |
| Arizona State Retirement System | 702,282 | $73.9M | 0.40% | −31,306−4.3% | Reduced |
| Empowered Funds, LLC | 686,197 | $72.2M | 1.23% | +83,405+13.8% | Added |
| Compass Capital Management, Inc | 682,027 | $71.8M | 3.99% | −104,841−13.3% | Reduced |
| Harvest Portfolios Group Inc. | 670,161 | $70.5M | 1.23% | −75,668−10.1% | Reduced |
| Boston Partners | 668,722 | $70.4M | 0.07% | −34,160−4.9% | Reduced |
| United Super Pty Ltd in its capacity as Trustee for the Construction & Building Unions Superannuation Fund | 658,905 | $69.4M | 0.96% | +658,905 | New |
| FIL Ltd | 656,094 | $69.1M | 0.05% | −168,147−20.4% | Reduced |
| Czech National Bank | 654,472 | $68.9M | 0.45% | +20,087+3.2% | Added |
| Cacti Asset Management LLC | 644,853 | $68.8M | 4.24% | +550.0% | Added |
| AustralianSuper Pty Ltd | 648,251 | $68.2M | 0.32% | 00.0% | Unchanged |
| ProShare Advisors LLC | 628,875 | $66.2M | 0.12% | +45,109+7.7% | Added |
| Fort Washington Investment Advisors Inc | 628,768 | $66.2M | 0.35% | +16,080+2.6% | Added |
| HRT Financial LP | 612,756 | $64.5M | 0.20% | +354,697+137.4% | Added |
| Heritage Wealth Advisors | 610,573 | $64.3M | 2.45% | −3,524−0.6% | Reduced |
| Jain Global LLC | 605,675 | $63.8M | 0.62% | +542,759+862.7% | Added |
| Ofi Invest Asset Management | 705,885 | $63.3M | 0.90% | −27,934−3.8% | Reduced |
| Clearbridge Investments, LLC | 600,371 | $63.2M | 0.05% | −4,370,116−87.9% | Reduced |
| Westwood Holdings Group Inc. | 599,995 | $63.2M | 0.51% | +570,776+1,953.4% | Added |
| MetLife Investment Management | 595,616 | $62.7M | 0.30% | −24,494−3.9% | Reduced |
| Fifth Third Bancorp | 588,969 | $62.0M | 0.20% | −11,563−1.9% | Reduced |
| Rockland Trust Co | 577,430 | $60.8M | 2.39% | −2,909−0.5% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 577,332 | $60.8M | 0.31% | −22,477−3.7% | Reduced |
| Whittier Trust Co | 557,983 | $60.7M | 0.66% | +18,574+3.4% | Added |
| D.A. Davidson & Co. | 576,959 | $60.7M | 0.37% | +24,576+4.4% | Added |
| Peapack Gladstone Financial Corp | 567,975 | $59.8M | 0.75% | +2,094+0.4% | Added |
| Douglas Lane & Associates, LLC | 565,829 | $59.6M | 0.82% | +26,479+4.9% | Added |
| Perpetual Ltd | 563,716 | $59.3M | 0.86% | +9,261+1.7% | Added |
| Banque Pictet & Cie SA | 557,062 | $58.6M | 0.59% | −231,291−29.3% | Reduced |
| Kornitzer Capital Management Inc | 552,959 | $58.2M | 1.21% | +7,905+1.5% | Added |
| Illinois Municipal Retirement Fund | 546,730 | $57.5M | 0.72% | −2,215−0.4% | Reduced |
| Assenagon Asset Management S.A. | 541,572 | $57.0M | 0.09% | −4,955,092−90.1% | Reduced |
| Gateway Investment Advisers LLC | 537,068 | $56.5M | 0.53% | +594+0.1% | Added |
| Zurich Insurance Group Ltd | 529,303 | $55.7M | 0.39% | +529,303 | New |
| Retirement Systems of Alabama | 528,014 | $55.6M | 0.18% | −4,808−0.9% | Reduced |
| Kempen Capital Management N.V. | 524,615 | $55.2M | 0.47% | −82,120−13.5% | Reduced |
| Glenmede Trust Co NA | 524,371 | $55.2M | 0.26% | +524,371 | New |
| Radnor Capital Management, LLC | 519,558 | $54.7M | 8.12% | −1,491−0.3% | Reduced |
| Sanibel Captiva Trust Company, Inc. | 511,020 | $53.8M | 1.49% | −9,161−1.8% | Reduced |
| IFM Investors Pty Ltd | 509,829 | $53.7M | 0.45% | +455+0.1% | Added |
| RNC Capital Management LLC | 505,611 | $53.2M | 2.42% | +761+0.2% | Added |
| Wiley Bros.-Aintree Capital, LLC | 503,900 | $53.0M | 0.28% | +33,464+7.1% | Added |
| Oppenheimer Asset Management Inc. | 502,885 | $52.9M | 0.65% | −51,113−9.2% | Reduced |
| Jefferies Financial Group Inc. | 500,928 | $52.7M | 0.43% | +277,608+124.3% | Added |
| Aristotle Atlantic Partners, LLC | 496,610 | $52.3M | 2.39% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 492,451 | $51.8M | 0.17% | −72,786−12.9% | Reduced |
| Tocqueville Asset Management L.P. | 492,211 | $51.8M | 0.76% | −54,989−10.0% | Reduced |
| Federation des caisses Desjardins du Quebec | 483,385 | $50.9M | 0.19% | −8,095−1.6% | Reduced |
| SRB Corp | 473,365 | $49.8M | 2.74% | 00.0% | Unchanged |
| Benjamin Edwards Inc | 472,544 | $49.7M | 0.55% | −21,391−4.3% | Reduced |
| Banco Bilbao Vizcaya Argentaria, S.A. | 470,498 | $49.6M | 0.35% | −49,391−9.5% | Reduced |
| Pathstone Holdings, LLC | 469,580 | $49.5M | 0.19% | +3,988+0.9% | Added |
| O'Shaughnessy Asset Management, LLC | 469,388 | $49.4M | 0.27% | +93,446+24.9% | Added |
| B. Metzler seel. Sohn & Co. AG | 465,812 | $49.1M | 0.43% | +18,602+4.2% | Added |
| Boston Trust Walden Corp | 465,618 | $49.0M | 0.37% | −14,563−3.0% | Reduced |
| Alps Advisors Inc | 465,114 | $49.0M | 0.29% | +251,929+118.2% | Added |
| Amalgamated Bank | 464,116 | $48.9M | 0.35% | −11,172−2.4% | Reduced |
| Capitolis Liquid Global Markets LLC | 460,400 | $48.5M | 0.29% | +206,700+81.5% | Added |
| Nichols & Pratt Advisers LLP | 451,621 | $47.5M | 2.97% | −3,211−0.7% | Reduced |
| Gotham Asset Management, LLC | 447,427 | $47.1M | 0.17% | −144,880−24.5% | Reduced |
| Fukoku Mutual Life Insurance Co | 447,246 | $47.1M | 3.09% | −813−0.2% | Reduced |
| Pinnacle Associates Ltd | 446,260 | $47.0M | 0.60% | +3,144+0.7% | Added |
| RMB Capital Management, LLC | 443,222 | $47.0M | 0.81% | +52,799+13.5% | Added |
| Distillate Capital Partners LLC | 444,426 | $46.8M | 2.41% | −113,557−20.4% | Reduced |
| British Columbia Investment Management Corp | 443,226 | $46.7M | 0.25% | +81,689+22.6% | Added |
| Ilmarinen Mutual Pension Insurance Co | 441,500 | $46.5M | 0.37% | +8,500+2.0% | Added |