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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
1,467 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.

Institutional holdersQ1 2026: 3,812 institutions
Q1 2021: 2,693 institutionsQ2 2021: 2,684 institutionsQ3 2021: 2,658 institutionsQ4 2021: 2,910 institutionsQ1 2022: 2,962 institutionsQ2 2022: 3,020 institutionsQ3 2022: 2,997 institutionsQ4 2022: 3,244 institutionsQ1 2023: 3,188 institutionsQ2 2023: 3,262 institutionsQ3 2023: 3,222 institutionsQ4 2023: 3,444 institutionsQ1 2024: 3,547 institutionsQ2 2024: 3,558 institutionsQ3 2024: 3,502 institutionsQ4 2024: 3,618 institutionsQ1 2025: 3,459 institutionsQ2 2025: 3,337 institutionsQ3 2025: 3,319 institutionsQ4 2025: 3,674 institutionsQ1 2026: 3,812 institutionsQ2 2026: 3,855 institutions
Value heldQ1 2026: $231.9B
Q1 2021: $143.2BQ2 2021: $144.3BQ3 2021: $138.8BQ4 2021: $142.2BQ1 2022: $152.1BQ2 2022: $171.5BQ3 2022: $162.7BQ4 2022: $212.2BQ1 2023: $205.1BQ2 2023: $222.8BQ3 2023: $197.7BQ4 2023: $211.6BQ1 2024: $256.9BQ2 2024: $242.3BQ3 2024: $221.8BQ4 2024: $196.9BQ1 2025: $177.7BQ2 2025: $155.9BQ3 2025: $159.8BQ4 2025: $206.6BQ1 2026: $231.9BQ2 2026: $254.3B
Institutions holding MRK and their total value by quarter
QuarterHoldersValue
Q2 20263,855$254.3B
Q1 20263,812$231.9B
Q4 20253,674$206.6B
Q3 20253,319$159.8B
Q2 20253,337$155.9B
Q1 20253,459$177.7B
Q4 20243,618$196.9B
Q3 20243,502$221.8B
Q2 20243,558$242.3B
Q1 20243,547$256.9B
Q4 20233,444$211.6B
Q3 20233,222$197.7B
Q2 20233,262$222.8B
Q1 20233,188$205.1B
Q4 20223,244$212.2B
Q3 20222,997$162.7B
Q2 20223,020$171.5B
Q1 20222,962$152.1B
Q4 20212,910$142.2B
Q3 20212,658$138.8B
Q2 20212,684$144.3B
Q1 20212,693$143.2B

Institutions, Q1 2026

Shares, value and share of portfolio for each institution holding Merck & Co., Inc.; share changes are against Q4 2025.

Institutions holding MRK in Q1 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Financial Life Planners1$780.00%+1New
Hurley Capital, LLC2$2410.00%+2New
Walsh & Associates, LLC4$4810.00%+4New
Bear Mountain Capital, Inc.5$5860.00%00.0%Unchanged
Hoey Investments, Inc5$6020.00%00.0%Unchanged
Networth Advisors, LLC6$7220.00%−45−88.2%Reduced
Breakwater Investment Management9$1.08K0.00%−100−91.7%Reduced
Nvest Wealth Strategies, Inc.9$1.08K0.00%+9New
Silver Grove Financial Group, Inc.9$1.08K0.00%+9New
Palladiem, LLC10$1.21K0.00%00.0%Unchanged
Mountain Hill Investment Partners Corp.10$1.22K0.00%−547−98.2%Reduced
Benson Wealth Management INC13$1.56K0.00%−8−38.1%Reduced
My Portfolio Guide, LLC16$1.93K0.00%+16New
CWM Advisors, LLC18$2.17K0.00%00.0%Unchanged
Atlantic Private Wealth, LLC20$2.41K0.00%00.0%Unchanged
Davis Capital Management21$2.53K0.00%00.0%Unchanged
ROSS\JOHNSON & Associates LLC24$2.89K0.05%−3−11.1%Reduced
C M Bidwell & Associates Ltd24$2.89K0.00%00.0%Unchanged
Ball & Co Wealth Management Inc.31$3.00K0.00%00.0%Unchanged
Elequin Capital LP27$3.25K0.00%−15−35.7%Reduced
Halbert Hargrove Global Advisors, LLC35$4.21K0.00%00.0%Unchanged
Altshuler Shaham Ltd36$4.33K0.00%+36New
Clarity Asset Management, Inc.39$4.65K0.00%+1+2.6%Added
PayPay Securities Corp46$5.31K0.18%−13−22.0%Reduced
Eukles Asset Management45$5.41K0.00%00.0%Unchanged
Vanguard Advisers Inc45$5.41K0.00%+45New
Three Bearings Fiduciary Advisors, Inc.45$5.49K0.01%+20+80.0%Added
Merkkuri Wealth Advisors LLC49$5.89K0.00%+49New
Key Capital Management, INC49$5.89K0.00%−50−50.5%Reduced
Graney & King, LLC50$5.98K0.00%+1+2.0%Added
Bradley & Co. Private Wealth Management, LLC51$6.18K0.00%00.0%Unchanged
Decker Retirement Planning Inc.55$6.62K0.00%00.0%Unchanged
CBIZ Investment Advisory Services, LLC57$6.91K0.00%−563−90.8%Reduced
Imprint Wealth LLC58$6.98K0.03%00.0%Unchanged
WestEnd Advisors, LLC67$8.06K0.00%−139−67.5%Reduced
Legacy Wealth Managment, LLC70$8.42K0.00%+64+1,066.7%Added
Burkett Financial Services, LLC72$8.67K0.00%+1+1.4%Added
Navigoe, LLC81$9.00K0.01%00.0%Unchanged
Darwin Advisors, LLC79$9.52K0.00%00.0%Unchanged
Portus Wealth Advisors, LLC80$9.62K0.01%+80New
Strive Financial Group ,LLC81$10.0K0.01%00.0%Unchanged
HFM Investment Advisors, LLC87$10.5K0.00%−28−24.3%Reduced
Evelyn Partners Investment Management (Europe) Ltd87$10.5K0.00%00.0%Unchanged
Prudent Man Investment Management, Inc.100$10.5K0.00%00.0%Unchanged
Park Square Financial Group, LLC94$11.2K0.08%−37−28.2%Reduced
Investors Towarzystwo Funduszy Inwestycyjnych Spolka Akcyjna96$11.5K0.00%+96New
RMG Wealth Management LLC105$11.6K0.00%+63+150.0%Added
Miller Wealth Advisors, LLC100$12.0K0.00%00.0%Unchanged
Frazier Financial Advisors, LLC100$12.0K0.01%00.0%Unchanged
NorthAvenue LLC100$12.0K0.01%00.0%Unchanged
Sofos Investments, Inc.100$12.0K0.00%+100New
Copia Wealth Management111$13.4K0.01%00.0%Unchanged
HighMark Wealth Management LLC114$13.7K0.01%+82+256.3%Added
Turim 21 Investimentos Ltda.114$13.7K0.00%+114New
Torren Management, LLC117$14.0K0.01%−1,417−92.4%Reduced
Evelyn Partners Asset Management Ltd118$14.2K0.00%00.0%Unchanged
LM Advisors LLC1,727$14.3K0.29%+215+14.2%Added
Morton Brown Family Wealth, LLC119$14.3K0.00%00.0%Unchanged
Mosley Wealth Management175$14.6K0.01%+175New
DecisionPoint Financial, LLC122$14.7K0.00%−15−10.9%Reduced
Financial Avengers, Inc.131$15.7K0.01%−14−9.7%Reduced
Keystone Financial Group, Inc.132$15.9K0.01%+1+0.8%Added
Luken Investment Analytics, LLC134$16.1K0.01%−15−10.1%Reduced
Virginia Estate & Retirement Planning Advisors Inc.135$16.2K0.07%+135New
Portfolio Resources Advisor Group, Inc.148$17.9K0.02%−9−5.7%Reduced
Clal Insurance Enterprises Holdings Ltd159$19.0K0.00%+1+0.6%Added
IFG Advisory, LLC158$19.0K0.05%−24,449−99.4%Reduced
Cherry Tree Wealth Management, LLC160$19.2K0.00%−460−74.2%Reduced
Robinson Value Management, Ltd.166$20.0K0.01%00.0%Unchanged
Financially Speaking Inc176$21.2K0.10%00.0%Unchanged
Burk Holdings LLC184$22.1K0.01%+184New
Y.D. More Investments Ltd269$22.7K0.00%−1,285−82.7%Reduced
Tidemark, LLC193$23.2K0.01%+18+10.3%Added
Advocate Investing Services LLC199$23.9K0.02%00.0%Unchanged
Knights of Columbus Asset Advisors LLC200$24.1K0.00%00.0%Unchanged
Sellwood Investment Partners LLC200$24.1K0.01%00.0%Unchanged
Atomic Invest LLC209$24.7K0.01%+59+39.3%Added
Bullseye Investment Management, LLC209$25.1K0.01%−18−7.9%Reduced
Provenance Wealth Advisors, LLC210$25.3K0.00%−60−22.2%Reduced
Capula Management Ltd220$26.5K0.00%+220New
Capital & Planning, LLC220$26.5K0.02%+220New
Friedenthal Financial223$26.8K0.01%00.0%Unchanged
Sankala Group LLC229$27.7K0.02%00.0%Unchanged
Pinney & Scofield, Inc.235$28.3K0.02%00.0%Unchanged
Bay Harbor Wealth Management, LLC239$28.9K0.01%+78+48.4%Added
Protective Life Corp241$29.0K0.10%+241New
WealthCollab, LLC245$29.5K0.01%+24+10.9%Added
Abound Financial, LLC246$29.6K0.01%00.0%Unchanged
Horizon Financial Services, LLC250$30.1K0.01%00.0%Unchanged
Greykasell Wealth Strategies, Inc.251$30.2K0.01%+251New
Solstein Capital, LLC255$30.7K0.01%+255New
Noble Wealth Management PBC261$31.4K0.02%00.0%Unchanged
Western Pacific Wealth Management, LP263$31.7K0.03%00.0%Unchanged
Security National Bank267$32.1K0.00%−1,365−83.6%Reduced
Red Tortoise LLC267$32.1K0.01%00.0%Unchanged
Lloyd Advisory Services, LLC.272$32.8K0.01%−684−71.5%Reduced
Kingdom Financial Group LLC.272$32.8K0.01%+31+12.9%Added
Cypress Capital Management LLC (WY)283$34.0K0.03%+25+9.7%Added
Harbor Asset Planning, Inc.285$34.3K0.03%00.0%Unchanged
Barnes Dennig Private Wealth Management LLC294$35.4K0.04%00.0%Unchanged