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 |
|---|---|---|---|---|---|
| CORDA Investment Management, LLC. | 427,526 | $51.4M | 3.56% | −9,548−2.2% | Reduced |
| Northwestern Mutual Wealth Management Co | 427,111 | $51.4M | 0.03% | +10,623+2.6% | Added |
| S&CO Inc | 425,528 | $51.2M | 3.18% | −30.0% | Reduced |
| Integral Health Asset Management, LLC | 425,000 | $51.1M | 2.71% | +175,000+70.0% | Added |
| Vaughan David Investments LLC | 414,509 | $49.9M | 1.05% | +514+0.1% | Added |
| GWM Advisors LLC | 413,565 | $49.7M | 0.18% | +17,134+4.3% | Added |
| Cambridge Investment Research Advisors, Inc. | 411,342 | $49.5M | 0.13% | −10,588−2.5% | Reduced |
| Systematic Alpha Investments, LLC | 410,682 | $49.4M | 1.74% | 00.0% | Unchanged |
| JustInvest LLC | 409,858 | $49.3M | 0.48% | +23,972+6.2% | Added |
| PensionDanmark Pensionsforsikringsaktieselskab | 408,667 | $49.2M | 0.48% | −27,385−6.3% | Reduced |
| Banco Bilbao Vizcaya Argentaria, S.A. | 407,269 | $49.0M | 0.34% | −63,229−13.4% | Reduced |
| Varma Mutual Pension Insurance Co | 406,874 | $48.9M | 0.29% | +10,000+2.5% | Added |
| Fiduciary Trust Co | 406,382 | $48.9M | 0.58% | −17,514−4.1% | Reduced |
| Sanctuary Advisors, LLC | 406,087 | $48.8M | 0.26% | +48,579+13.6% | Added |
| Raiffeisen Bank International AG | 413,033 | $48.8M | 0.70% | −7,285−1.7% | Reduced |
| Utah Retirement Systems | 404,056 | $48.6M | 0.50% | −12,241−2.9% | Reduced |
| Public Sector Pension Investment Board | 401,889 | $48.3M | 0.15% | +79,307+24.6% | Added |
| TD Waterhouse Canada Inc. | 397,990 | $48.0M | 0.14% | +115,080+40.7% | Added |
| Vontobel Holding Ltd. | 387,524 | $46.6M | 0.16% | −45,379−10.5% | Reduced |
| Ferguson Wellman Capital Management, Inc | 385,956 | $46.4M | 0.63% | −374,694−49.3% | Reduced |
| Erste Asset Management GmbH | 390,856 | $46.3M | 0.43% | +19,885+5.4% | Added |
| Huntington National Bank | 382,963 | $46.1M | 0.25% | +126,611+49.4% | Added |
| Police & Firemen's Retirement System of New Jersey | 382,636 | $46.0M | 0.39% | −3,717−1.0% | Reduced |
| Meyer Handelman Co | 380,705 | $45.8M | 1.42% | +2,418+0.6% | Added |
| MML Investors Services, LLC | 380,197 | $45.7M | 0.13% | −32,570−7.9% | Reduced |
| Glenview Trust Co | 376,892 | $45.3M | 0.71% | +9,616+2.6% | Added |
| AIA Group Ltd | 375,724 | $45.2M | 0.66% | −6,570−1.7% | Reduced |
| Capital Investment Advisors, LLC | 369,782 | $44.5M | 0.65% | +6,971+1.9% | Added |
| Smith Chas P & Associates Pa Cpas | 367,523 | $44.2M | 2.40% | −3,413−0.9% | Reduced |
| Beacon Pointe Advisors, LLC | 367,061 | $44.2M | 0.23% | +76,661+26.4% | Added |
| Ilmarinen Mutual Pension Insurance Co | 366,500 | $44.1M | 0.35% | −75,000−17.0% | Reduced |
| Andra AP-fonden | 364,485 | $43.8M | 0.55% | −63,615−14.9% | Reduced |
| NEOS Investment Management LLC | 364,439 | $43.8M | 0.22% | −45,111−11.0% | Reduced |
| Edmond de Rothschild Holding S.A. | 364,118 | $43.8M | 0.63% | −60,298−14.2% | Reduced |
| Jefferies Financial Group Inc. | 361,688 | $43.5M | 0.53% | −139,240−27.8% | Reduced |
| Rakuten Investment Management, Inc. | 368,357 | $43.5M | 0.09% | +40,848+12.5% | Added |
| Farallon Capital Management, L.L.C. | 361,000 | $43.4M | 0.26% | +361,000 | New |
| Saudi Central Bank | 359,011 | $43.2M | 0.91% | +90,581+33.7% | Added |
| Letko, Brosseau & Associates Inc | 358,019 | $43.1M | 0.69% | −12,515−3.4% | Reduced |
| Northwest & Ethical Investments L.P. | 351,729 | $42.3M | 0.98% | +23,081+7.0% | Added |
| Waters Parkerson & Co., LLC | 351,577 | $42.3M | 2.17% | −1460.0% | Reduced |
| Jane Street Group, LLC | 351,131 | $42.2M | 0.05% | +223,444+175.0% | Added |
| Advisors Asset Management, Inc. | 349,476 | $42.0M | 0.70% | +6,787+2.0% | Added |
| New York Life Investment Management LLC | 344,750 | $41.5M | 0.35% | +4,462+1.3% | Added |
| British Columbia Investment Management Corp | 342,084 | $41.1M | 0.24% | −101,142−22.8% | Reduced |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 337,029 | $40.9M | 0.41% | −7,979−2.3% | Reduced |
| Kestra Advisory Services, LLC | 338,012 | $40.7M | 0.15% | +45,974+15.7% | Added |
| MAI Capital Management | 335,023 | $40.3M | 0.23% | +11,532+3.6% | Added |
| Conning Inc. | 333,031 | $40.1M | 1.33% | −19,946−5.7% | Reduced |
| Heritage Investors Management Corp | 332,467 | $40.0M | 1.21% | +595+0.2% | Added |
| Prudential PLC | 332,437 | $40.0M | 0.31% | −48,039−12.6% | Reduced |
| Lido Advisors, LLC | 330,201 | $39.9M | 0.16% | −29,272−8.1% | Reduced |
| Nissay Asset Management Corp | 329,632 | $39.7M | 0.21% | −3,203−1.0% | Reduced |
| Ethic Inc. | 326,297 | $39.3M | 0.62% | +8,152+2.6% | Added |
| Fred Alger Management, LLC | 321,001 | $38.7M | 0.17% | +276,750+625.4% | Added |
| Public Employees Retirement Association of Colorado | 320,946 | $38.6M | 0.15% | −611−0.2% | Reduced |
| Pinnacle Financial Partners, Inc. | 320,321 | $38.5M | 0.29% | −5,512−1.7% | Reduced |
| Norris Perne & French LLP | 318,845 | $38.4M | 1.87% | +66,683+26.4% | Added |
| Welch & Forbes LLC | 317,368 | $38.2M | 0.49% | −4,861−1.5% | Reduced |
| Willis Investment Counsel | 313,718 | $37.7M | 2.06% | 00.0% | Unchanged |
| Migdal Insurance & Financial Holdings Ltd. | 310,002 | $37.6M | 0.33% | +310,002 | New |
| State of Alaska, Department of Revenue | 311,685 | $37.5M | 0.41% | +510+0.2% | Added |
| Wealthfront Advisers LLC | 311,279 | $37.4M | 0.08% | +54,035+21.0% | Added |
| Private Wealth Partners, LLC | 309,338 | $37.2M | 2.87% | −2,449−0.8% | Reduced |
| Howard Capital Management Group, LLC | 308,798 | $37.1M | 2.47% | +5,766+1.9% | Added |
| Steward Partners Investment Advisory, LLC | 305,398 | $36.7M | 0.19% | +5,456+1.8% | Added |
| SRS Capital Advisors, Inc. | 303,856 | $36.5M | 1.03% | +9,927+3.4% | Added |
| Atalanta Sosnoff Capital, LLC | 302,127 | $36.3M | 0.78% | +175,167+138.0% | Added |
| Cullen/Frost Bankers, Inc. | 300,942 | $36.2M | 0.41% | +84,945+39.3% | Added |
| Adams Diversified Equity Fund, Inc. | 300,200 | $36.1M | 1.27% | −8,600−2.8% | Reduced |
| M&G Plc | 298,044 | $35.8M | 0.18% | −73,223−19.7% | Reduced |
| Sequoia Financial Advisors, LLC | 297,046 | $35.7M | 0.20% | −9,097−3.0% | Reduced |
| Hancock Whitney Corp | 299,230 | $35.7M | 0.62% | −8,070−2.6% | Reduced |
| Massachusetts Financial Services Co | 271,829 | $35.6M | 0.01% | −4,144,192−93.8% | Reduced |
| Teachers Retirement System of the State of Kentucky | 295,607 | $35.6M | 0.28% | +23,719+8.7% | Added |
| Martingale Asset Management L P | 294,925 | $35.5M | 0.89% | −28,874−8.9% | Reduced |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 293,491 | $35.3M | 1.24% | +96,637+49.1% | Added |
| Quintet Private Bank (Europe) S.A. | 293,071 | $35.3M | 2.36% | −6,073−2.0% | Reduced |
| Douglass Winthrop Advisors, LLC | 292,328 | $35.2M | 0.64% | −15,002−4.9% | Reduced |
| Gabelli Funds LLC | 288,480 | $34.7M | 0.23% | −15,585−5.1% | Reduced |
| Avanza Fonder AB | 285,007 | $34.3M | 0.95% | −4,713−1.6% | Reduced |
| Bradley Foster & Sargent Inc | 284,705 | $34.2M | 0.53% | −4,279−1.5% | Reduced |
| Oregon Public Employees Retirement Fund | 284,228 | $34.2M | 0.45% | 00.0% | Unchanged |
| Generali Asset Management SPA SGR | 284,084 | $34.2M | 0.71% | −24,089−7.8% | Reduced |
| Wesbanco Bank Inc | 282,430 | $34.0M | 0.94% | −6,970−2.4% | Reduced |
| Whittier Trust Co of Nevada Inc | 280,055 | $33.8M | 0.69% | +18,723+7.2% | Added |
| Factory Mutual Insurance Co | 281,024 | $33.8M | 0.38% | +3,650+1.3% | Added |
| ASR Vermogensbeheer N.V. | 278,937 | $33.6M | 0.39% | +5,059+1.8% | Added |
| Horizon Investments, LLC | 277,662 | $33.4M | 0.37% | +18,625+7.2% | Added |
| Haverford Trust Co | 277,400 | $33.4M | 0.31% | −2,235−0.8% | Reduced |
| Stephens Inc | 272,906 | $33.2M | 0.42% | −69,234−20.2% | Reduced |
| Thompson Siegel & Walmsley LLC | 274,701 | $33.0M | 0.58% | −27,181−9.0% | Reduced |
| Private Advisor Group, LLC | 273,347 | $32.9M | 0.15% | −11,783−4.1% | Reduced |
| Becker Capital Management Inc | 271,104 | $32.8M | 0.97% | −14,351−5.0% | Reduced |
| CapWealth Advisors, LLC | 271,272 | $32.6M | 2.42% | −57,043−17.4% | Reduced |
| Citizens Financial Group Inc | 269,662 | $32.6M | 0.45% | −6,532−2.4% | Reduced |
| Dai-Ichi Life Insurance Company, Ltd | 270,465 | $32.5M | 0.93% | +41,648+18.2% | Added |
| Davenport & Co LLC | 269,725 | $32.4M | 0.18% | +8,738+3.3% | Added |
| Pinebridge Investments LLC | 266,126 | $32.0M | 0.27% | −71,357−21.1% | Reduced |
| Americana Partners, LLC | 266,031 | $32.0M | 0.83% | +45,626+20.7% | Added |