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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
IFC & Insurance Marketing, Inc.293$31.0K0.03%+293New
Front Row Advisors LLC297$31.5K0.01%00.0%Unchanged
Gilpin Wealth Management, LLC301$31.7K0.03%+301New
Safe Harbor Fiduciary, LLC302$31.8K0.03%+302New
Evolution Wealth Management Inc.303$31.9K0.03%+58+23.7%Added
Anfield Capital Management, LLC318$33.5K0.01%+13+4.3%Added
Y.D. More Investments Ltd1,554$33.9K0.00%−265−14.6%Reduced
Tucker Asset Management LLC326$34.3K0.01%+326New
Moisand Fitzgerald Tamayo, LLC327$34.4K0.00%00.0%Unchanged
Marquette Asset Management, LLC336$35.4K0.01%+82+32.3%Added
Horizons Wealth Management344$36.2K0.02%00.0%Unchanged
Granite FO LLC347$36.5K0.02%−973−73.7%Reduced
Curio Wealth, LLC345$36.7K0.01%00.0%Unchanged
Entrust Financial LLC350$36.8K0.03%+350New
Silicon Valley Capital Partners350$36.9K0.00%−72−17.1%Reduced
POM Investment Strategies, LLC360$37.9K0.02%+287+393.2%Added
IMG Wealth Management, Inc.362$38.1K0.02%+20+5.8%Added
Winch Advisory Services, LLC364$38.3K0.01%+1+0.3%Added
Spurstone Advisory Services, LLC374$39.4K0.62%00.0%Unchanged
Wealth Watch Advisors, INC392$41.3K0.02%−18−4.4%Reduced
Wellington-Altus USA Inc.400$42.1K0.03%+400New
Horizon Bancorp Inc407$43.0K0.02%00.0%Unchanged
Deane Retirement Strategies, Inc.415$43.7K0.02%00.0%Unchanged
Stephens Consulting, LLC417$43.9K0.01%00.0%Unchanged
United Financial Planning Group LLC422$44.4K0.03%+53+14.4%Added
Accent Capital Management, LLC420$44.6K0.02%00.0%Unchanged
Miller Capital Partners, Inc.425$44.7K0.02%+425New
Alvarez & Marsal Private Wealth Partners, LLC441$46.8K0.01%+441New
Vermillion & White Wealth Management Group, LLC950$47.2K0.03%+200+26.7%Added
Valued Wealth Advisors LLC444$47.2K0.02%+94+26.9%Added
Fiduciary Advisors, Inc.453$47.7K0.04%00.0%Unchanged
Dunhill Financial, LLC455$47.9K0.01%+36+8.6%Added
Marshall & Sterling Wealth Advisors Inc.456$48.0K0.03%−90−16.5%Reduced
Tower Trust & Investment Co460$48.4K0.03%00.0%Unchanged
Sunrise Financial Services, LLC461$48.5K0.04%+461New
Camelot Portfolios, LLC461$48.6K0.03%+461New
Mascoma Wealth Management LLC472$49.7K0.01%+27+6.1%Added
Roble, Belko & Company, Inc475$50.0K0.01%+52+12.3%Added
Merited Wealth, LLC489$51.5K0.05%+489New
Board of the Pension Protection Fund500$52.6K0.05%−1,800−78.3%Reduced
Dougherty Wealth Advisers LLC500$52.6K0.03%00.0%Unchanged
J.Safra Asset Management Corp502$52.8K0.00%+52+11.6%Added
Hyposwiss Advisors SA505$53.2K0.05%+505New
Kilter Group LLC509$53.6K0.02%+140+37.9%Added
Quattro Advisors LLC509$53.6K0.04%+509New
Arcadia Investment Management Corp515$54.2K0.01%+15+3.0%Added
Blueline Advisors LLC521$54.8K0.04%+521New
AXS Investments LLC527$55.5K0.02%−170−24.4%Reduced
Howard Hughes Medical Institute534$56.2K0.03%−3−0.6%Reduced
1015 Capital Partners, LLC534$56.2K0.06%+534New
Swiss Re Ltd537$56.5K0.00%+537New
Seneschal Advisors, LLC542$57.1K0.04%+45+9.1%Added
Mountain Hill Investment Partners Corp.557$58.6K0.04%00.0%Unchanged
Accordant Advisory Group Inc563$59.3K0.04%00.0%Unchanged
Team Financial Group, LLC564$59.4K0.03%+5+0.9%Added
Turning Point Benefit Group, Inc.567$59.7K0.03%+55+10.7%Added
SWAN Capital LLC573$60.3K0.02%+16+2.9%Added
Gunpowder Capital Management, LLC dba Oliver Wealth Management575$60.5K0.05%+575New
Toth Financial Advisory Corp591$62.2K0.01%+52+9.6%Added
MJT & Associates Financial Advisory Group, Inc.596$62.7K0.05%−20−3.2%Reduced
Insight Financial Services597$62.8K0.03%00.0%Unchanged
Copeland Capital Management, LLC600$63.2K0.00%00.0%Unchanged
Chung Wu Investment Group, LLC600$63.2K0.05%+300+100.0%Added
Align Financial, LLC63,893$63.9K0.04%+63,893New
Evelyn Partners Investment Management Services Ltd608$64.0K0.01%00.0%Unchanged
Ares Financial Consulting, LLC613$64.5K0.06%+613New
Arlington Trust Co LLC615$64.7K0.01%−2,845−82.2%Reduced
Cherry Tree Wealth Management, LLC620$65.3K0.01%−77−11.0%Reduced
CBIZ Investment Advisory Services, LLC620$65.8K0.00%+71+12.9%Added
Sfam, LLC649$68.3K0.06%+649New
GPS Wealth Strategies Group, LLC658$69.2K0.06%−2,523−79.3%Reduced
Wiser Advisor Group LLC660$69.5K0.08%+5+0.8%Added
Cedar Mountain Advisors, LLC670$70.5K0.01%00.0%Unchanged
Clayton Financial Group LLC675$71.1K0.04%+675New
Retirement Wealth Solutions LLC679$71.5K0.05%+4+0.6%Added
Quest 10 Wealth Builders, Inc.680$71.6K0.06%−32−4.5%Reduced
Gleason Group, Inc.691$72.7K0.01%+32+4.9%Added
Aspect Partners, LLC703$74.0K0.03%00.0%Unchanged
Bellevue Asset Management, LLC717$75.5K0.04%+4+0.6%Added
VSM Wealth Advisory, LLC723$76.1K0.02%+3+0.4%Added
Battery Global Advisors, LLC718$76.2K0.04%00.0%Unchanged
Atwood & Palmer Inc730$76.8K0.00%00.0%Unchanged
Activest Wealth Management732$77.0K0.01%−37−4.8%Reduced
Scarborough Advisors, LLC767$80.7K0.01%−3−0.4%Reduced
Highline Wealth Partners LLC768$80.8K0.02%−9,905−92.8%Reduced
Modus Advisors, LLC773$81.3K0.02%+773New
Cornerstone Financial Management LLC779$82.0K0.08%+779New
Global Wealth Strategies & Associates786$82.7K0.02%+227+40.6%Added
LFA - Lugano Financial Advisors SA788$82.9K0.04%00.0%Unchanged
Fairman Group, LLC790$83.8K0.07%00.0%Unchanged
Phillip James Consulting Co.773$85.0K1.50%+773New
Country Trust Bank809$85.2K0.00%−23−2.8%Reduced
Signature Equity Partners, LLC830$87.3K0.05%+830New
Beaird Harris Wealth Management, LLC832$87.5K0.01%+220+35.9%Added
Wilkerson Advisory Group LLC841$88.5K0.03%+841New
1620 Investment Advisors, Inc.842$88.6K0.06%00.0%Unchanged
DiNuzzo Private Wealth, Inc.890$93.7K0.01%+21+2.4%Added
DV Trading LLC902$94.9K0.01%+902New
Principia Wealth Advisory, LLC928$97.6K0.06%+40+4.5%Added
Cedar Wealth Management, LLC935$98.4K0.03%−239−20.4%Reduced