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, Q3 2025
Institutional positions in Merck & Co., Inc. as of Sep 30, 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
- 3,319
- +42 vs. Q2 2025
- Shares held
- 1.90B
- −25.7M (−1.3%) vs. Q2 2025
- Total value
- $159.8B
- +$6.99B (+4.6%) vs. Q2 2025
- New holders
- 191
- 1,361 more added
- Sold out
- 149
- 1,427 more reduced
60 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Merck & Co., Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Tri Locum Partners LP | 446,874 | $37.5M | 8.62% | +446,874 | New |
| Pinnacle Associates Ltd | 443,116 | $37.2M | 0.49% | +292+0.1% | Added |
| CORDA Investment Management, LLC. | 440,283 | $37.0M | 2.60% | +8,245+1.9% | Added |
| Kahn Brothers Group Inc | 433,750 | $36.4M | 6.85% | −56,715−11.6% | Reduced |
| Ilmarinen Mutual Pension Insurance Co | 433,000 | $36.3M | 0.27% | 00.0% | Unchanged |
| Pinebridge Investments, L.P. | 432,527 | $36.3M | 0.27% | −41,514−8.8% | Reduced |
| Fiduciary Trust Co | 432,043 | $36.3M | 0.41% | +2,774+0.6% | Added |
| SRS Capital Advisors, Inc. | 429,287 | $36.0M | 0.52% | +146,145+51.6% | Added |
| Schonfeld Strategic Advisors LLC | 427,765 | $35.9M | 0.25% | +377,266+747.1% | Added |
| USS Investment Management Ltd | 422,758 | $35.5M | 0.17% | 00.0% | Unchanged |
| S&CO Inc | 422,531 | $35.5M | 2.17% | −3,340−0.8% | Reduced |
| Utah Retirement Systems | 416,282 | $34.9M | 0.34% | −920−0.2% | Reduced |
| Union Bancaire Privee, UBP SA | 390,881 | $34.9M | 0.71% | +23,780+6.5% | Added |
| Vaughan David Investments LLC | 412,241 | $34.6M | 0.75% | +8,664+2.1% | Added |
| Xponance, Inc. | 411,145 | $34.5M | 0.27% | −19,686−4.6% | Reduced |
| Systematic Alpha Investments, LLC | 410,682 | $34.5M | 1.13% | 00.0% | Unchanged |
| Prudential PLC | 409,563 | $34.4M | 0.25% | +11,393+2.9% | Added |
| Rathbone Brothers plc | 409,261 | $34.3M | 0.14% | −68,271−14.3% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 406,370 | $34.1M | 0.09% | −41,849−9.3% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 406,255 | $34.1M | 0.27% | +23,661+6.2% | Added |
| Varma Mutual Pension Insurance Co | 402,774 | $33.8M | 0.22% | +33,100+9.0% | Added |
| Conning Inc. | 401,059 | $33.7M | 1.12% | +366,481+1,059.9% | Added |
| Vontobel Holding Ltd. | 398,452 | $33.4M | 0.10% | +16,386+4.3% | Added |
| RMB Capital Management, LLC | 390,423 | $33.0M | 0.61% | −2,365−0.6% | Reduced |
| CIBC Private Wealth Group, LLC | 392,779 | $33.0M | 0.06% | −16,094−3.9% | Reduced |
| QRG Capital Management, Inc. | 383,614 | $32.2M | 0.39% | −148,030−27.8% | Reduced |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 363,801 | $31.7M | 0.28% | −15,259−4.0% | Reduced |
| Horizon Investments, LLC | 377,589 | $31.7M | 0.42% | +86,095+29.5% | Added |
| Meyer Handelman Co | 377,173 | $31.7M | 1.00% | +6,025+1.6% | Added |
| O'Shaughnessy Asset Management, LLC | 375,942 | $31.6M | 0.19% | +61,803+19.7% | Added |
| Ruffer LLP | 368,848 | $31.0M | 1.72% | +277,916+305.6% | Added |
| Kovitz Investment Group Partners, LLC | 367,253 | $30.9M | 0.12% | −936,627−71.8% | Reduced |
| Glenview Trust Co | 367,399 | $30.8M | 0.49% | −2,490−0.7% | Reduced |
| Capital Investment Advisors, LLC | 363,917 | $30.5M | 0.50% | +14,012+4.0% | Added |
| M&G Plc | 362,987 | $30.5M | 0.16% | −92,913−20.4% | Reduced |
| British Columbia Investment Management Corp | 361,537 | $30.3M | 0.17% | −34,908−8.8% | Reduced |
| Lido Advisors, LLC | 358,879 | $30.3M | 0.12% | +124,536+53.1% | Added |
| Federated Hermes, Inc. | 360,695 | $30.3M | 0.05% | −307,109−46.0% | Reduced |
| Martingale Asset Management L P | 359,827 | $30.2M | 0.76% | −29,300−7.5% | Reduced |
| Toroso Investments, LLC | 357,597 | $30.0M | 0.13% | +20,061+5.9% | Added |
| LGT Group Foundation | 331,240 | $29.9M | 0.34% | −72,228−17.9% | Reduced |
| Letko, Brosseau & Associates Inc | 353,989 | $29.7M | 0.51% | +6,700+1.9% | Added |
| Pictet & Cie (Europe) SA | 349,292 | $29.3M | 0.59% | −199,923−36.4% | Reduced |
| NEOS Investment Management LLC | 347,684 | $29.2M | 0.22% | +99,074+39.9% | Added |
| Commerzbank Aktiengesellschaft | 347,249 | $29.1M | 0.61% | +148,957+75.1% | Added |
| Public Sector Pension Investment Board | 346,437 | $29.1M | 0.11% | −215,105−38.3% | Reduced |
| MML Investors Services, LLC | 345,904 | $29.0M | 0.08% | +13,885+4.2% | Added |
| Spears Abacus Advisors LLC | 345,292 | $29.0M | 0.55% | +7,934+2.4% | Added |
| CIBC Bancorp USA Inc. | 345,081 | $29.0M | 0.17% | +345,081 | New |
| GWM Advisors LLC | 341,158 | $28.6M | 0.13% | −25,231−6.9% | Reduced |
| Waters Parkerson & Co., LLC | 340,913 | $28.6M | 1.39% | +7,831+2.4% | Added |
| Generali Asset Management SPA SGR | 340,540 | $28.6M | 0.61% | +100,726+42.0% | Added |
| Advisors Asset Management, Inc. | 340,309 | $28.6M | 0.48% | +43,520+14.7% | Added |
| New York Life Investment Management LLC | 339,161 | $28.5M | 0.25% | −6,662−1.9% | Reduced |
| Sanctuary Advisors, LLC | 336,656 | $28.3M | 0.16% | −4,006−1.2% | Reduced |
| Nissay Asset Management Corp | 330,649 | $27.8M | 0.15% | −7,132−2.1% | Reduced |
| Heritage Investors Management Corp | 329,661 | $27.7M | 0.83% | +741+0.2% | Added |
| Welch & Forbes LLC | 326,753 | $27.4M | 0.33% | −4,855−1.5% | Reduced |
| CapWealth Advisors, LLC | 325,980 | $27.4M | 1.88% | +454+0.1% | Added |
| Gabelli Funds LLC | 325,440 | $27.3M | 0.18% | −675−0.2% | Reduced |
| Public Employees Retirement Association of Colorado | 322,783 | $27.1M | 0.10% | −7,108−2.2% | Reduced |
| Sector Gamma AS | 322,500 | $27.1M | 6.71% | +120,500+59.7% | Added |
| JustInvest LLC | 319,771 | $26.9M | 0.28% | −2,859−0.9% | Reduced |
| Private Wealth Partners, LLC | 318,299 | $26.7M | 1.90% | +1,535+0.5% | Added |
| Stephens Inc | 314,883 | $26.5M | 0.34% | +7,094+2.3% | Added |
| Hancock Whitney Corp | 315,335 | $26.5M | 0.48% | −11,701−3.6% | Reduced |
| Willis Investment Counsel | 313,817 | $26.3M | 1.44% | +50,635+19.2% | Added |
| Sequoia Financial Advisors, LLC | 311,565 | $26.1M | 0.16% | +12,467+4.2% | Added |
| Howard Capital Management Group, LLC | 310,960 | $26.1M | 1.65% | −349−0.1% | Reduced |
| State of Alaska, Department of Revenue | 310,665 | $26.1M | 0.27% | −16,779−5.1% | Reduced |
| Bridgeway Capital Management, LLC | 308,956 | $25.9M | 0.55% | +16,772+5.7% | Added |
| Douglass Winthrop Advisors, LLC | 308,927 | $25.9M | 0.45% | +25,337+8.9% | Added |
| Adams Diversified Equity Fund, Inc. | 308,800 | $25.9M | 0.87% | +308,800 | New |
| Ceredex Value Advisors LLC | 307,732 | $25.8M | 0.60% | +307,732 | New |
| Wesbanco Bank Inc | 306,579 | $25.7M | 0.72% | −45,025−12.8% | Reduced |
| Northwest & Ethical Investments L.P. | 304,530 | $25.6M | 0.60% | +1,970+0.7% | Added |
| Northwestern Mutual Wealth Management Co | 304,147 | $25.5M | 0.02% | +3,795+1.3% | Added |
| Investment Management Corp of Ontario | 303,153 | $25.4M | 0.39% | +79,006+35.2% | Added |
| Thompson Siegel & Walmsley LLC | 302,387 | $25.4M | 0.41% | +17,077+6.0% | Added |
| Private Advisor Group, LLC | 299,848 | $25.2M | 0.12% | −3,548−1.2% | Reduced |
| Aware Super Pty Ltd as trustee of Aware Super | 299,433 | $25.1M | 0.35% | 00.0% | Unchanged |
| Becker Capital Management Inc | 296,427 | $25.1M | 0.73% | −7,498−2.5% | Reduced |
| ARGA Investment Management, LP | 298,328 | $25.0M | 0.66% | −225,587−43.1% | Reduced |
| Cardinal Capital Management, Inc. | 293,875 | $24.7M | 0.71% | +24,204+9.0% | Added |
| Ethic Inc. | 291,066 | $24.4M | 0.40% | −9,582−3.2% | Reduced |
| MAI Capital Management | 290,739 | $24.4M | 0.15% | +38,358+15.2% | Added |
| Quintet Private Bank (Europe) S.A. | 290,430 | $24.4M | 1.37% | +26,740+10.1% | Added |
| Bradley Foster & Sargent Inc | 290,335 | $24.4M | 0.36% | −13,645−4.5% | Reduced |
| Whittier Trust Co of Nevada Inc | 272,642 | $24.3M | 0.52% | +2,487+0.9% | Added |
| Haverford Trust Co | 289,639 | $24.3M | 0.22% | −19,617−6.3% | Reduced |
| Elo Mutual Pension Insurance Co | 288,211 | $24.2M | 0.40% | +35,876+14.2% | Added |
| Oregon Public Employees Retirement Fund | 285,565 | $24.0M | 0.31% | +68,594+31.6% | Added |
| Citizens Financial Group Inc | 282,793 | $23.9M | 0.33% | +1,703+0.6% | Added |
| Beacon Pointe Advisors, LLC | 284,213 | $23.9M | 0.20% | −1,507−0.5% | Reduced |
| GW&K Investment Management, LLC | 283,110 | $23.8M | 0.21% | −17,170−5.7% | Reduced |
| Vestcor Inc | 281,084 | $23.6M | 0.70% | −5,019−1.8% | Reduced |
| Factory Mutual Insurance Co | 281,024 | $23.6M | 0.23% | 00.0% | Unchanged |
| Rafferty Asset Management, LLC | 279,848 | $23.5M | 0.08% | +11,466+4.3% | Added |
| Voleon Capital Management LP | 278,010 | $23.3M | 0.57% | +143,007+105.9% | Added |
| Omers Administration Corp | 277,974 | $23.3M | 0.17% | +7,129+2.6% | Added |