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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
3,675
+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
1,404 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
Green Harvest Asset Management LLC2,407$253.4K0.00%−3−0.1%Reduced
ShankerValleau Wealth Advisors, Inc.2,407$253.4K0.07%00.0%Unchanged
SFG Wealth Management, LLC.2,407$253.4K0.10%+2,407New
Wealthedge Investment Advisors, LLC2,408$253.5K0.09%+2,408New
Alessandra Capital Management, LLC2,410$253.7K0.23%+2,410New
Osborne Partners Capital Management, LLC2,411$253.8K0.01%00.0%Unchanged
AGH Wealth Advisors, LLC2,412$253.9K0.19%−532−18.1%Reduced
Asset Planning,Inc2,413$254.0K0.18%+116+5.1%Added
Haven Private, LLC2,415$254.2K0.11%00.0%Unchanged
Pacitti Group Inc.2,405$254.4K0.09%+2,405New
Bell Investment Advisors, Inc2,421$254.8K0.04%−439−15.3%Reduced
Sterling Wealth Management, Inc.2,423$255.0K0.07%−927−27.7%Reduced
Blue Bell Private Wealth Management, LLC2,423$255.0K0.04%+40+1.7%Added
Wall Street Financial Group, Inc.2,423$255.0K0.19%+2,423New
Strait & Sound Wealth Management LLC2,424$255.2K0.09%00.0%Unchanged
Quaker Wealth Management, LLC2,428$255.6K0.08%+66+2.8%Added
Sharp Financial Services, LLC2,430$255.8K0.13%−55−2.2%Reduced
Concentric Capital Strategies, LP2,433$256.1K0.01%−114,797−97.9%Reduced
Pine Harbor Wealth Management, LLC2,433$256.1K0.08%−31−1.3%Reduced
Acorns Advisers, LLC2,439$257.0K0.00%−10−0.4%Reduced
Coquina Private Wealth LLC2,446$257.5K0.21%+2,446New
HBE Wealth Management, LLC2,449$257.8K0.24%+2,449New
Grey Fox Wealth Advisors, LLC2,436$258.5K0.05%−380−13.5%Reduced
McGuire Capital Advisors Inc2,456$258.5K0.16%+2,456New
MLG Wealth Management DBA Pine Grove Financial Group2,463$259.2K0.03%+2,463New
WFA of San Diego, LLC2,470$260.0K0.19%+10+0.4%Added
Grant Private Wealth Management Inc2,476$260.6K0.16%−236−8.7%Reduced
Swisher Financial Concepts, Inc.2,478$260.8K0.15%+2,478New
American Trust Investment Advisors, LLC2,483$261.4K0.14%00.0%Unchanged
49 Wealth Management, LLC2,488$261.9K0.02%−198−7.4%Reduced
Ground Swell Capital, LLC2,492$262.3K0.54%+2,492New
Forte Asset Management LLC2,475$262.6K0.12%00.0%Unchanged
BlueChip Wealth Advisors LLC2,500$263.1K0.11%−275−9.9%Reduced
Harvey Capital Management Inc2,500$263.1K0.06%00.0%Unchanged
Independent Investors Inc2,500$263.1K0.05%00.0%Unchanged
Holt Capital Advisors, L.L.C. dba Holt Capital Partners, L.P.2,500$263.1K0.04%00.0%Unchanged
Waycross Partners, LLC2,500$263.1K0.02%00.0%Unchanged
Viewpoint Investment Partners Corp2,500$263.1K0.13%+2,500New
Crusonia Wealth Advisors LLC2,508$264.0K0.06%+2,508New
Kellett Schaffner Wealth Advisors LLC2,509$264.1K0.15%−307−10.9%Reduced
Greenberg Financial Group2,511$264.3K0.11%+2,511New
Aspen Wealth Strategies, LLC2,513$264.6K0.14%+27+1.1%Added
Family Wealth Group, LLC2,518$265.0K0.17%+2,518New
Measured Wealth Private Client Group, LLC2,518$265.0K0.07%−55−2.1%Reduced
Southern Financial Group, LLC2,520$265.2K0.08%+2,520New
Academy Capital Management Inc2,524$265.7K0.04%00.0%Unchanged
J.E. Simmons & Co., P.C.2,524$265.7K0.17%+2,524New
Monument Group Wealth Advisors, LLC2,530$266.3K0.15%00.0%Unchanged
Tandem Investment Advisors, Inc.2,531$266.4K0.01%−570−18.4%Reduced
Private Wealth Management Group, LLC2,539$267.3K0.07%−25−1.0%Reduced
Marks Group Wealth Management, Inc2,546$268.0K0.03%−167−6.2%Reduced
CFO4Life Group, LLC2,548$268.2K0.04%−173−6.4%Reduced
Wick Capital Partners, LLC2,553$268.7K0.05%+2,553New
O'Keefe Stevens Advisory, Inc.2,569$270.4K0.07%+25+1.0%Added
Heck Capital Advisors, LLC2,558$271.2K0.02%+20+0.8%Added
Leslie Global Wealth, LLC2,581$271.7K0.12%+38+1.5%Added
Vantage Point Financial LLC2,584$272.0K0.10%+2,584New
Pasadena Private Wealth, LLC2,595$273.1K0.04%+110+4.4%Added
QP Wealth Management, LLC2,595$273.1K0.24%+2,595New
Kings Path Partners LLC2,600$273.7K0.10%00.0%Unchanged
Triune Financial Partners, LLC2,484$273.9K0.06%+42+1.7%Added
Prospect Financial Group LLC2,606$274.3K0.26%−136−5.0%Reduced
Traveka Wealth, LLC2,608$274.5K0.11%+73+2.9%Added
One + One Wealth Management, LLC2,611$274.8K0.13%+111+4.4%Added
Legacy Edge Advisors, LLC2,612$275.0K0.03%+78+3.1%Added
Kelly Financial Group LLC2,600$275.9K0.07%−207−7.4%Reduced
Mattern Capital Management, LLC2,623$276.1K0.03%00.0%Unchanged
S Harris Financial Group, LLC2,630$276.8K0.27%+2,630New
Florida Financial Advisors, LLC2,651$277.1K0.08%+2,651New
Granville Capital, Inc.2,633$277.1K0.15%+2,633New
Valley Brook Capital Group2,636$277.5K0.18%−200−7.1%Reduced
Signet Private Wealth LLC2,645$278.4K0.27%+2,645New
Invst, LLC2,649$278.8K0.03%+2,649New
Avenue 1 Advisors, LLC2,650$278.9K0.09%+52+2.0%Added
Magnolia Private Wealth, LLC2,652$279.1K0.20%+51+2.0%Added
KDK Private Wealth Management, LLC2,659$279.9K0.24%+2,659New
Wealth Group, Ltd.2,667$281.0K0.27%+2,667New
Curran Financial Partners, LLC2,680$282.1K0.05%−99−3.6%Reduced
Family Wealth Partners, LLC2,684$282.5K0.10%00.0%Unchanged
Navellier & Associates Inc2,686$282.7K0.03%−5,707−68.0%Reduced
First Commonwealth Financial Corp2,688$283.0K0.05%−267−9.0%Reduced
Lanham O'Dell & Company, Inc.2,691$283.3K0.08%+2+0.1%Added
Shakespeare Wealth Management, Inc.2,692$283.4K0.06%00.0%Unchanged
Jag Capital Management, LLC2,696$283.8K0.03%00.0%Unchanged
Brighton Securities Corp.2,698$284.0K0.14%−328−10.8%Reduced
Cedarwood Wealth LLC2,644$284.0K0.32%+2,644New
Gabelli & Co Investment Advisers, Inc.2,700$284.2K0.04%−300−10.0%Reduced
Quantum Private Wealth, LLC2,700$284.2K0.08%00.0%Unchanged
JM2 Capital Inc.2,701$284.3K0.23%+2,701New
Trust Co of Oklahoma2,704$284.6K0.08%+180+7.1%Added
KWB Wealth2,705$284.7K0.03%+37+1.4%Added
Deroy & Devereaux Private Investment Counsel Inc2,703$285.0K0.01%00.0%Unchanged
Gibson Capital, LLC2,710$285.3K0.05%−570−17.4%Reduced
Vectors Research Management, LLC2,712$285.4K0.09%−33−1.2%Reduced
Moment Partners, LLC2,691$285.5K0.06%00.0%Unchanged
ORG Wealth Partners, LLC2,713$285.6K0.07%−455−14.4%Reduced
ASL Financial, LLC2,714$285.7K0.22%+2,714New
Harvest Investment Services, LLC2,717$286.0K0.05%+2,717New
Rollins Financial Advisors, LLC2,718$286.1K0.04%+12+0.4%Added
Winthrop Partners - WNY, LLC2,722$286.5K0.15%+2,722New