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, 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
- 1,466 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 | 3,855 | $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 | 3,501 | $221.8B |
| Q2 2024 | 3,557 | $242.3B |
| Q1 2024 | 3,546 | $256.9B |
| Q4 2023 | 3,443 | $211.6B |
| Q3 2023 | 3,221 | $197.7B |
| Q2 2023 | 3,261 | $222.8B |
| Q1 2023 | 3,187 | $205.1B |
| Q4 2022 | 3,243 | $212.2B |
| Q3 2022 | 2,996 | $162.7B |
| Q2 2022 | 3,019 | $171.5B |
| Q1 2022 | 2,961 | $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 |
|---|---|---|---|---|---|
| Causeway Capital Management LLC | 854,212 | $102.8M | 1.26% | −190,405−18.2% | Reduced |
| Resona Asset Management Co.,Ltd. | 856,748 | $102.7M | 0.51% | −14,931−1.7% | Reduced |
| Keybank National Association | 853,050 | $102.6M | 0.37% | +22,955+2.8% | Added |
| State of New Jersey Common Pension Fund D | 848,249 | $102.0M | 0.39% | −11,986−1.4% | Reduced |
| Tredje AP-fonden | 841,448 | $101.2M | 0.55% | +132,188+18.6% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 838,615 | $100.9M | 0.17% | −95,504−10.2% | Reduced |
| Squarepoint Ops LLC | 830,857 | $99.9M | 0.21% | +764,712+1,156.1% | Added |
| Advisor Group Holdings, Inc. | 827,246 | $99.6M | 0.15% | +18,680+2.3% | Added |
| Lansforsakringar Fondforvaltning AB (publ) | 804,827 | $96.8M | 0.51% | −63,102−7.3% | Reduced |
| Spears Abacus Advisors LLC | 798,223 | $96.0M | 1.88% | +452,283+130.7% | Added |
| Guggenheim Capital LLC | 794,868 | $95.6M | 0.76% | +21,150+2.7% | Added |
| Man Group plc | 793,167 | $95.4M | 0.20% | −1,050,361−57.0% | Reduced |
| Compagnie Lombard Odier SCmA | 792,577 | $95.3M | 1.17% | −35,099−4.2% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 791,735 | $95.2M | 1.42% | 00.0% | Unchanged |
| Mercer Global Advisors Inc | 785,937 | $94.5M | 0.14% | +10,727+1.4% | Added |
| Sarasin & Partners LLP | 785,691 | $94.5M | 1.15% | −129,503−14.2% | Reduced |
| Donaldson Capital Management, LLC | 785,160 | $94.4M | 3.06% | +7,199+0.9% | Added |
| Calamos Advisors LLC | 777,663 | $93.5M | 0.36% | +57,857+8.0% | Added |
| Munich Reinsurance Co Stock Corp in Munich | 752,637 | $90.5M | 2.23% | −237,281−24.0% | Reduced |
| Bahl & Gaynor Inc | 750,494 | $90.3M | 0.46% | −14,345−1.9% | Reduced |
| Midwest Trust Co | 747,618 | $89.9M | 1.12% | −19,353−2.5% | Reduced |
| PBU - The Pension Fund of Early Childhood & Youth Educators | 744,629 | $89.6M | 1.35% | −31,337−4.0% | Reduced |
| First Financial Bankshares Inc | 743,601 | $89.4M | 1.81% | +15,082+2.1% | Added |
| Assenagon Asset Management S.A. | 743,214 | $89.4M | 0.14% | +201,642+37.2% | Added |
| CIBC Asset Management Inc | 742,928 | $89.4M | 0.22% | +22,210+3.1% | Added |
| Pacer Advisors, Inc. | 732,981 | $88.2M | 0.25% | −3,618,416−83.2% | Reduced |
| Samlyn Capital, LLC | 726,481 | $87.4M | 1.50% | +726,481 | New |
| State of Michigan Retirement System | 723,090 | $87.0M | 0.46% | −1,400−0.2% | Reduced |
| Virginia Retirement Systems Et Al | 718,238 | $86.4M | 0.64% | −638,100−47.0% | Reduced |
| Old Republic International Corporation | 705,600 | $84.9M | 3.37% | 00.0% | Unchanged |
| Epoch Investment Partners, Inc. | 701,092 | $84.3M | 0.51% | −9,359−1.3% | Reduced |
| Nisa Investment Advisors, LLC | 693,541 | $84.0M | 0.31% | −17,578−2.5% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 691,506 | $83.2M | 0.67% | −31,543−4.4% | Reduced |
| Arizona State Retirement System | 679,746 | $81.8M | 0.48% | −22,536−3.2% | Reduced |
| Czech National Bank | 675,968 | $81.3M | 0.53% | +21,496+3.3% | Added |
| Allspring Global Investments Holdings, LLC | 672,535 | $81.3M | 0.14% | −229,771−25.5% | Reduced |
| OrbiMed Advisors LLC | 663,400 | $79.8M | 1.81% | +663,400 | New |
| Teacher Retirement System of Texas | 659,877 | $79.4M | 0.33% | −118,090−15.2% | Reduced |
| Fort Washington Investment Advisors Inc | 659,851 | $79.4M | 0.44% | +31,083+4.9% | Added |
| Cacti Asset Management LLC | 645,299 | $77.6M | 4.79% | +446+0.1% | Added |
| Boston Partners | 641,766 | $77.5M | 0.08% | −26,956−4.0% | Reduced |
| ING Groep NV | 641,709 | $77.2M | 0.47% | −144,789−18.4% | Reduced |
| Clark Capital Management Group, Inc. | 640,272 | $77.0M | 0.48% | +622,454+3,493.4% | Added |
| Credit Agricole S A | 637,765 | $76.7M | 0.25% | −559,651−46.7% | Reduced |
| Harvest Portfolios Group Inc. | 626,802 | $75.4M | 1.24% | −43,359−6.5% | Reduced |
| 1832 Asset Management L.P. | 616,840 | $74.2M | 0.10% | −554,796−47.4% | Reduced |
| Westwood Holdings Group Inc. | 608,628 | $73.2M | 0.53% | +8,633+1.4% | Added |
| FIL Ltd | 597,352 | $71.9M | 0.06% | −58,742−9.0% | Reduced |
| O'Shaughnessy Asset Management, LLC | 596,468 | $71.7M | 0.36% | +127,080+27.1% | Added |
| Perpetual Ltd | 594,443 | $71.5M | 1.10% | +30,727+5.5% | Added |
| Compass Capital Management, Inc | 589,768 | $70.9M | 4.29% | −92,259−13.5% | Reduced |
| Whittier Trust Co | 585,422 | $70.7M | 0.80% | +27,439+4.9% | Added |
| MetLife Investment Management | 580,004 | $69.8M | 0.36% | −15,612−2.6% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 578,169 | $69.5M | 0.35% | +837+0.1% | Added |
| Clearbridge Investments, LLC | 577,786 | $69.5M | 0.06% | −22,585−3.8% | Reduced |
| AustralianSuper Pty Ltd | 575,397 | $69.2M | 0.36% | −72,854−11.2% | Reduced |
| D.A. Davidson & Co. | 572,593 | $68.9M | 0.42% | −4,366−0.8% | Reduced |
| Holocene Advisors, LP | 572,467 | $68.9M | 0.17% | −313,293−35.4% | Reduced |
| Federation des caisses Desjardins du Quebec | 570,879 | $68.7M | 0.25% | +87,494+18.1% | Added |
| Peapack Gladstone Financial Corp | 564,709 | $67.9M | 0.87% | −3,266−0.6% | Reduced |
| Douglas Lane & Associates, LLC | 561,892 | $67.6M | 0.97% | −3,937−0.7% | Reduced |
| Aristotle Atlantic Partners, LLC | 552,486 | $66.5M | 3.11% | +55,876+11.3% | Added |
| Ofi Invest Asset Management | 630,057 | $65.9M | 0.87% | −75,828−10.7% | Reduced |
| Kornitzer Capital Management Inc | 544,161 | $65.5M | 1.41% | −8,798−1.6% | Reduced |
| Rockland Trust Co | 534,963 | $64.4M | 2.58% | −42,467−7.4% | Reduced |
| Retirement Systems of Alabama | 527,079 | $63.4M | 0.21% | −935−0.2% | Reduced |
| ProShare Advisors LLC | 525,295 | $63.2M | 0.09% | −103,580−16.5% | Reduced |
| Kempen Capital Management N.V. | 522,959 | $62.9M | 0.55% | −1,656−0.3% | Reduced |
| IFM Investors Pty Ltd | 522,579 | $62.9M | 0.52% | +12,750+2.5% | Added |
| Glenmede Trust Co NA | 521,378 | $62.7M | 0.31% | −2,993−0.6% | Reduced |
| Radnor Capital Management, LLC | 519,443 | $62.5M | 9.25% | −1150.0% | Reduced |
| RNC Capital Management LLC | 514,340 | $61.9M | 2.71% | +8,729+1.7% | Added |
| Daiwa Securities Group Inc. | 513,752 | $61.8M | 0.18% | +21,301+4.3% | Added |
| Banque Pictet & Cie SA | 513,131 | $61.7M | 0.72% | −43,931−7.9% | Reduced |
| Natixis | 510,056 | $61.4M | 0.25% | +201,284+65.2% | Added |
| Empowered Funds, LLC | 507,815 | $61.1M | 0.39% | −178,382−26.0% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 506,594 | $61.0M | 0.30% | +2,694+0.5% | Added |
| Gotham Asset Management, LLC | 506,551 | $60.9M | 0.19% | +59,124+13.2% | Added |
| Mediolanum International Funds Ltd | 513,788 | $60.7M | 0.64% | −402,061−43.9% | Reduced |
| Sanibel Captiva Trust Company, Inc. | 503,081 | $60.5M | 1.69% | −7,939−1.6% | Reduced |
| United Super Pty Ltd in its capacity as Trustee for the Construction & Building Unions Superannuation Fund | 499,805 | $60.1M | 1.13% | −159,100−24.1% | Reduced |
| QRG Capital Management, Inc. | 499,732 | $60.1M | 0.62% | +79,823+19.0% | Added |
| Oppenheimer Asset Management Inc. | 492,072 | $59.2M | 0.68% | −10,813−2.2% | Reduced |
| Illinois Municipal Retirement Fund | 487,434 | $58.6M | 0.75% | −59,296−10.8% | Reduced |
| Pinnacle Associates Ltd | 485,756 | $58.4M | 0.75% | +39,496+8.9% | Added |
| Pathstone Holdings, LLC | 480,635 | $57.8M | 0.23% | +11,055+2.4% | Added |
| Xponance, Inc. | 473,091 | $56.9M | 0.40% | +59,880+14.5% | Added |
| SRB Corp | 463,298 | $55.7M | 3.42% | −10,067−2.1% | Reduced |
| Amalgamated Bank | 458,630 | $55.2M | 0.42% | −5,486−1.2% | Reduced |
| B. Metzler seel. Sohn & Co. AG | 454,985 | $54.7M | 0.51% | −10,827−2.3% | Reduced |
| Boston Trust Walden Corp | 453,194 | $54.5M | 0.45% | −12,424−2.7% | Reduced |
| Fukoku Mutual Life Insurance Co | 447,246 | $53.8M | 3.52% | 00.0% | Unchanged |
| Distillate Capital Partners LLC | 446,915 | $53.8M | 2.83% | +2,489+0.6% | Added |
| Nichols & Pratt Advisers LLP | 446,639 | $53.7M | 3.48% | −4,982−1.1% | Reduced |
| Tocqueville Asset Management L.P. | 446,512 | $53.7M | 0.80% | −45,699−9.3% | Reduced |
| RMB Capital Management, LLC | 443,638 | $53.7M | 0.96% | +416+0.1% | Added |
| Gateway Investment Advisers LLC | 443,847 | $53.4M | 0.60% | −93,221−17.4% | Reduced |
| USS Investment Management Ltd | 434,031 | $52.2M | 0.22% | +10,994+2.6% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 431,038 | $51.8M | 0.07% | +124,541+40.6% | Added |
| Alps Advisors Inc | 427,760 | $51.5M | 0.24% | −37,354−8.0% | Reduced |