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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, 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
1,380 more added
Sold out
127
1,403 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.

Institutional holdersQ4 2025: 3,674 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 heldQ4 2025: $206.6B
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, Q4 2025

Shares, value and share of portfolio for each institution holding Merck & Co., Inc.; share changes are against Q3 2025.

Institutions holding MRK in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Legacy Bridge, LLC4$4220.00%+4New
Hoey Investments, Inc5$5270.00%00.0%Unchanged
Bear Mountain Capital, Inc.5$5550.00%−100−95.2%Reduced
Legacy Wealth Managment, LLC6$6320.00%00.0%Unchanged
Bridge Generations Wealth Management LLC6$6320.00%00.0%Unchanged
Palladiem, LLC10$1.05K0.00%+10New
Bard Associates Inc15$1.59K0.00%+15New
Luminist Capital LLC17$1.79K0.00%+17New
CWM Advisors, LLC18$1.90K0.00%+18New
Atlantic Private Wealth, LLC20$2.10K0.00%+20New
Davis Capital Management21$2.21K0.00%00.0%Unchanged
Benson Wealth Management INC21$2.21K0.00%+21New
C M Bidwell & Associates Ltd24$2.53K0.00%00.0%Unchanged
Three Bearings Fiduciary Advisors, Inc.25$2.76K0.00%+25New
ROSS\JOHNSON & Associates LLC27$2.84K0.05%−21−43.8%Reduced
Ball & Co Wealth Management Inc.31$3.00K0.00%00.0%Unchanged
Cresta Advisors, Ltd.31$3.26K0.00%+31New
HighMark Wealth Management LLC32$3.32K0.00%+18+128.6%Added
Greenline Wealth Management LLC32$3.37K0.00%+32New
Halbert Hargrove Global Advisors, LLC35$3.69K0.00%−266−88.4%Reduced
Clarity Asset Management, Inc.38$4.04K0.00%00.0%Unchanged
Whipplewood Advisors, LLC41$4.32K0.00%+41New
Elequin Capital LP42$4.42K0.00%+42New
RMG Wealth Management LLC42$4.59K0.00%00.0%Unchanged
Eukles Asset Management45$4.74K0.00%00.0%Unchanged
Investors Portfolio Services LLC47$4.97K0.00%+47New
Harvest Fund Management Co., Ltd44$5.00K0.00%−330−88.2%Reduced
Graney & King, LLC49$5.19K0.00%00.0%Unchanged
Alexis Investment Partners, LLC50$5.26K0.00%00.0%Unchanged
Bradley & Co. Private Wealth Management, LLC51$5.37K0.00%00.0%Unchanged
Networth Advisors, LLC51$5.37K0.00%+51New
Fountainhead AM, LLC52$5.47K0.01%−2,771−98.2%Reduced
Decker Retirement Planning Inc.55$5.79K0.00%00.0%Unchanged
CKW Financial Group56$6.00K0.00%−44−44.0%Reduced
Imprint Wealth LLC58$6.11K0.03%−176−75.2%Reduced
PayPay Securities Corp59$6.21K0.18%+13+28.3%Added
Eq Wealth Advisors, LLC62$6.53K0.00%+62New
Burkett Financial Services, LLC71$7.53K0.00%00.0%Unchanged
Navigoe, LLC81$8.00K0.00%00.0%Unchanged
E Fund Management (Hong Kong) Co., Ltd.73$8.28K0.00%+46+170.4%Added
Darwin Advisors, LLC79$8.33K0.00%−228−74.3%Reduced
Strive Financial Group ,LLC81$8.53K0.00%+81New
Mendota Financial Group, LLC87$9.13K0.01%00.0%Unchanged
Evelyn Partners Investment Management (Europe) Ltd87$9.16K0.00%00.0%Unchanged
Fairway Wealth LLC93$9.79K0.00%+93New
Key Capital Management, INC99$10.4K0.01%+99New
Miller Wealth Advisors, LLC100$10.5K0.00%00.0%Unchanged
Palouse Capital Management, Inc.100$10.5K0.01%+100New
Frazier Financial Advisors, LLC100$10.5K0.01%+100New
Prudent Man Investment Management, Inc.100$10.5K0.00%+100New
NorthAvenue LLC100$10.5K0.01%+100New
Minot DeBlois Advisors LLC100$10.6K0.01%−318−76.1%Reduced
Breakwater Investment Management109$11.5K0.00%−650−85.6%Reduced
Copia Wealth Management111$11.7K0.01%00.0%Unchanged
HFM Investment Advisors, LLC115$12.1K0.00%+94+447.6%Added
Evelyn Partners Asset Management Ltd118$12.4K0.00%00.0%Unchanged
Morton Brown Family Wealth, LLC119$12.5K0.00%+19+19.0%Added
Park Square Financial Group, LLC131$12.9K0.08%+129+6,450.0%Added
Estate Planners Group, LLC128$13.5K0.01%+128New
Keystone Financial Group, Inc.131$13.9K0.01%+2+1.6%Added
LM Advisors LLC1,512$14.3K0.29%−15,889−91.3%Reduced
DecisionPoint Financial, LLC137$14.4K0.00%+125+1,041.7%Added
Aviso Financial Inc.142$14.9K0.00%+142New
Financial Avengers, Inc.145$15.3K0.01%+1+0.7%Added
Luken Investment Analytics, LLC149$15.7K0.01%+15+11.2%Added
Atomic Invest LLC150$15.9K0.01%+150New
Portfolio Resources Advisor Group, Inc.157$16.7K0.02%+157New
Clal Insurance Enterprises Holdings Ltd158$17.0K0.00%−90−36.3%Reduced
Bay Harbor Wealth Management, LLC161$17.1K0.00%+127+373.5%Added
Robinson Value Management, Ltd.166$17.5K0.01%00.0%Unchanged
Osbon Capital Management LLC169$17.8K0.02%+169New
Tidemark, LLC175$18.4K0.01%00.0%Unchanged
Financially Speaking Inc176$18.5K0.01%00.0%Unchanged
eCIO, Inc.180$18.9K0.01%+180New
Intesa Sanpaolo Wealth Management184$19.4K0.00%+184New
Advocate Investing Services LLC199$20.9K0.02%+199New
Sellwood Investment Partners LLC200$21.1K0.01%−15−7.0%Reduced
Knights of Columbus Asset Advisors LLC200$21.1K0.00%00.0%Unchanged
Joseph Group Capital Management200$21.1K0.01%+200New
WestEnd Advisors, LLC206$21.7K0.00%−7−3.3%Reduced
WealthCollab, LLC221$23.3K0.01%+111+100.9%Added
Redmont Wealth Advisors LLC222$23.4K0.04%00.0%Unchanged
Friedenthal Financial223$23.5K0.01%00.0%Unchanged
Bullseye Investment Management, LLC227$23.9K0.01%+227New
Pinney & Scofield, Inc.235$24.7K0.01%−17−6.7%Reduced
Kingdom Financial Group LLC.241$25.3K0.01%+241New
Prosperity Bancshares Inc245$25.8K0.02%+245New
Abound Financial, LLC246$25.9K0.01%+246New
Horizon Financial Services, LLC250$26.3K0.01%00.0%Unchanged
Tradewinds Capital Management, LLC259$27.3K0.01%−162−38.5%Reduced
Cypress Capital Management LLC (WY)258$27.4K0.03%+73+39.5%Added
Midwest Capital Advisors, LLC261$27.5K0.01%00.0%Unchanged
Noble Wealth Management PBC261$27.5K0.01%00.0%Unchanged
Western Pacific Wealth Management, LP263$27.7K0.03%00.0%Unchanged
Red Tortoise LLC267$28.1K0.01%00.0%Unchanged
Sankala Group LLC229$28.4K0.02%+229New
Provenance Wealth Advisors, LLC270$28.4K0.00%−100−27.0%Reduced
Harbor Asset Planning, Inc.285$30.0K0.03%00.0%Unchanged
Barnes Dennig Private Wealth Management LLC294$30.9K0.03%−60−16.9%Reduced
High Note Wealth, LLC294$30.9K0.01%+109+58.9%Added