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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, Q2 2026

Institutional positions in Merck & Co., Inc. as of Jun 30, 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

Q3 2026 data is still coming in: 11 institutions have reported holding MRK so far. See Q3 2026

Institutional holders
3,855
+95 vs. Q1 2026
Shares held
1.98B
+52.6M (+2.7%) vs. Q1 2026
Total value
$254.3B
+$23.0B (+9.9%) vs. Q1 2026
New holders
213
1,635 more added
Sold out
118
1,509 more reduced

53 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2026: 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 holdersQ2 2026: 3,855 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: 3,619 institutionsQ1 2025: 3,460 institutionsQ2 2025: 3,338 institutionsQ3 2025: 3,320 institutionsQ4 2025: 3,675 institutionsQ1 2026: 3,813 institutionsQ2 2026: 3,855 institutions
Value heldQ2 2026: $254.3B
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 20263,813$231.9B
Q4 20253,675$206.6B
Q3 20253,320$159.8B
Q2 20253,338$155.9B
Q1 20253,460$177.7B
Q4 20243,619$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, Q2 2026

Shares, value and share of portfolio for each institution holding Merck & Co., Inc.; share changes are against Q1 2026.

Institutions holding MRK in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
1st Source Bank93,431$12.0M0.54%−875−0.9%Reduced
Slocum, Gordon & Co LLP93,181$12.0M7.95%−1,267−1.3%Reduced
Financiere des Professionnels - Fonds d,investissement inc.93,117$12.0M0.67%−1,899−2.0%Reduced
NLB Skladi, upravljanje premozenja, d.o.o.93,000$12.0M0.45%−5,000−5.1%Reduced
Smithfield Trust Co92,939$11.9M0.48%+753+0.8%Added
Kinneret Advisory, LLC91,933$11.9M0.96%00.0%Unchanged
Hamel Associates, Inc.92,513$11.9M3.28%−288−0.3%Reduced
Linscomb & Williams, Inc.92,395$11.9M0.51%−1,216−1.3%Reduced
Ossiam91,787$11.8M0.16%+30,288+49.2%Added
Lowe Brockenbrough & Co Inc91,716$11.8M0.52%+89+0.1%Added
Evercore Wealth Management, LLC91,089$11.7M0.17%−708−0.8%Reduced
Algert Global LLC90,995$11.7M0.14%+9,323+11.4%Added
Advocate Group LLC90,572$11.6M1.75%−6,778−7.0%Reduced
Brighton Jones LLC90,183$11.6M0.22%+534+0.6%Added
Robertson Stephens Wealth Management, LLC89,372$11.6M0.28%−2,791−3.0%Reduced
Susquehanna Fundamental Investments, LLC89,259$11.5M0.22%+89,259New
Lee Danner & Bass Inc89,248$11.5M0.66%−712−0.8%Reduced
Quadrant Capital Group LLC88,627$11.4M0.31%−207−0.2%Reduced
Addenda Capital Inc.87,800$11.4M0.31%00.0%Unchanged
Cutler Investment Counsel LLC87,765$11.4M1.07%+134+0.2%Added
Beck Mack & Oliver LLC88,204$11.3M0.22%−1,415−1.6%Reduced
Sava Infond d.o.o.88,000$11.3M0.80%+34,380+64.1%Added
Azzad Asset Management Inc87,982$11.3M1.00%+2,257+2.6%Added
Birch Hill Investment Advisors LLC87,972$11.3M0.46%−833−0.9%Reduced
E. Ohman J:or Asset Management AB87,897$11.3M0.26%+2,840+3.3%Added
Neville Rodie & Shaw Inc87,699$11.3M0.73%−125−0.1%Reduced
NBT Bank N A87,583$11.3M0.75%−2,313−2.6%Reduced
Adalta Capital Management LLC86,966$11.2M4.94%−1,625−1.8%Reduced
Artisan Partners Limited Partnership87,246$11.2M0.02%−974,613−91.8%Reduced
Trillium Asset Management, LLC87,017$11.2M0.34%−4,355−4.8%Reduced
FLC Capital Advisors86,579$11.1M1.83%−823−0.9%Reduced
Buckingham Strategic Partners86,089$11.1M0.09%−11,635−11.9%Reduced
BLI - Banque de Luxembourg Investments85,000$11.0M0.39%+29,500+53.2%Added
WealthBridge Investment Counsel Inc.85,640$11.0M2.94%+425+0.5%Added
LaFleur & Godfrey LLC85,476$11.0M1.30%−2,676−3.0%Reduced
CBOE Vest Financial, LLC85,329$11.0M0.12%+10,278+13.7%Added
Heritage Trust Co84,905$10.9M0.95%+3,445+4.2%Added
Gladstone Institutional Advisory LLC84,891$10.9M0.34%+355+0.4%Added
Summit Trail Advisors, LLC84,812$10.9M0.14%+1,669+2.0%Added
Canandaigua National Bank & Trust Co83,853$10.8M0.91%+83,853New
Commonwealth Retirement Investments LLC83,307$10.7M2.91%−10,599−11.3%Reduced
Oak Harvest Investment Services82,981$10.7M1.00%−407−0.5%Reduced
Winslow Asset Management Inc82,574$10.6M1.84%−439−0.5%Reduced
Northern Oak Wealth Management Inc82,232$10.6M1.20%−3,114−3.6%Reduced
Sky Investment Group LLC82,126$10.6M1.66%−241−0.3%Reduced
Daymark Wealth Partners, LLC81,443$10.5M0.26%−175−0.2%Reduced
Perigon Wealth Management, LLC81,333$10.5M0.17%+1,124+1.4%Added
Greenleaf Trust81,295$10.4M0.10%+2,611+3.3%Added
Schaper Benz & Wise Investment Counsel Inc80,680$10.4M0.69%−2,155−2.6%Reduced
Thomas Story & Son LLC80,662$10.4M3.66%+2,117+2.7%Added
We Are One Seven, LLC80,447$10.3M0.17%+3,595+4.7%Added
Kingsview Wealth Management, LLC80,440$10.3M0.13%−54,311−40.3%Reduced
CAPROCK Group, Inc.79,617$10.3M0.20%+3,930+5.2%Added
Fulton Bank, N.A.80,029$10.3M0.31%+1,917+2.5%Added
Bellars Harris Wealth Management, LLC79,847$10.3M2.09%+79,847New
Principle Wealth Partners LLC79,812$10.3M0.51%−240−0.3%Reduced
Meridian Wealth Management, LLC79,604$10.2M0.32%+7,950+11.1%Added
Stock Yards Bank & Trust Co79,544$10.2M0.29%−2,665−3.2%Reduced
Freestone Capital Holdings, LLC79,532$10.2M0.27%−1,871−2.3%Reduced
Northwestern Mutual Investment Management Company, LLC79,187$10.2M0.12%−231−0.3%Reduced
Caisse des Depots Et Consignations79,080$10.2M0.17%−12,335−13.5%Reduced
GFS Advisors, LLC79,451$10.2M1.16%+437+0.6%Added
Global Retirement Partners, LLC78,760$10.1M0.15%+78,760New
Mutual Advisors, LLC78,606$10.1M0.19%+987+1.3%Added
Carret Asset Management, LLC78,520$10.1M0.88%−203−0.3%Reduced
Nixon Peabody Trust Co77,974$10.0M0.71%−733−0.9%Reduced
RiverFront Investment Group, LLC77,843$10.0M0.13%+23,849+44.2%Added
AustralianSuper Pty Ltd77,831$10.0M0.04%−497,566−86.5%Reduced
Live Oak Private Wealth LLC77,794$10.0M1.25%−1,544−1.9%Reduced
Contravisory Investment Management, Inc.76,643$9.85M1.74%−655−0.8%Reduced
Pinnacle Wealth Management Advisory Group, LLC76,268$9.80M0.58%+1,939+2.6%Added
Busey Wealth Management76,140$9.78M0.24%−3,308−4.2%Reduced
Clifford Swan Investment Counsel LLC75,680$9.72M0.31%−440−0.6%Reduced
Wealthspire Advisors, LLC75,165$9.66M0.05%+21,681+40.5%Added
Siemens Fonds Invest GmbH75,099$9.65M0.47%+939+1.3%Added
Sowell Financial Services LLC75,015$9.64M0.31%+466+0.6%Added
Intesa Sanpaolo S.p.A.75,023$9.64M0.34%+6,131+8.9%Added
Kennedy Capital Management, Inc.74,733$9.60M0.17%−4,011−5.1%Reduced
BNP Paribas74,751$9.59M0.26%−399−0.5%Reduced
MUFG Securities Americas Inc.74,388$9.56M0.49%+5,723+8.3%Added
Plato Investment Management Ltd74,299$9.49M0.55%+9,877+15.3%Added
Global X Japan Co., Ltd.73,680$9.47M0.35%+2,758+3.9%Added
Lifeworks Advisors, LLC73,618$9.46M0.99%+6,126+9.1%Added
Level Four Advisory Services, LLC73,273$9.42M0.27%−1,602−2.1%Reduced
Fifth Third Wealth Advisors LLC73,198$9.41M0.26%+1,144+1.6%Added
North Dakota State Investment Board72,931$9.37M0.38%−80−0.1%Reduced
Principal Securities, Inc.72,897$9.37M0.11%+227+0.3%Added
Trust Co of Toledo NA72,892$9.37M0.78%+54+0.1%Added
Trajan Wealth LLC72,721$9.34M0.35%+15,960+28.1%Added
Augustine Asset Management Inc72,655$9.34M1.89%−560−0.8%Reduced
Hennion & Walsh Asset Management, Inc.72,515$9.32M0.27%−1,078−1.5%Reduced
W Advisors, LLC72,472$9.31M4.23%−91−0.1%Reduced
Capital Analysts, LLC72,378$9.30M0.21%−1,637−2.2%Reduced
Mission Wealth Management, LP72,281$9.29M0.12%+46,291+178.1%Added
American Investment Services, Inc.72,201$9.28M1.96%+5,724+8.6%Added
Ledyard National Bank71,938$9.24M0.74%−1,507−2.1%Reduced
Carnegie Capital Asset Management, LLC71,923$9.24M0.19%−13,538−15.8%Reduced
Meeder Asset Management Inc71,755$9.22M0.47%−12,986−15.3%Reduced
Jacobi Capital Management LLC71,539$9.19M0.45%−746−1.0%Reduced
Round Hill Asset Management71,350$9.17M5.76%−665−0.9%Reduced