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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
1,466 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: 2,961 institutionsQ2 2022: 3,019 institutionsQ3 2022: 2,996 institutionsQ4 2022: 3,243 institutionsQ1 2023: 3,187 institutionsQ2 2023: 3,261 institutionsQ3 2023: 3,221 institutionsQ4 2023: 3,443 institutionsQ1 2024: 3,546 institutionsQ2 2024: 3,557 institutionsQ3 2024: 3,501 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 20243,501$221.8B
Q2 20243,557$242.3B
Q1 20243,546$256.9B
Q4 20233,443$211.6B
Q3 20233,221$197.7B
Q2 20233,261$222.8B
Q1 20233,187$205.1B
Q4 20223,243$212.2B
Q3 20222,996$162.7B
Q2 20223,019$171.5B
Q1 20222,961$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
Hodges Capital Management Inc.13,862$1.67M0.14%−2,603−15.8%Reduced
CSS LLC13,865$1.67M0.09%−2,060−12.9%Reduced
Cypress Wealth Services, LLC13,894$1.67M0.24%+205+1.5%Added
Beverly Hills Private Wealth, LLC13,899$1.67M0.28%+8,347+150.3%Added
Fjell Capital, LLC13,929$1.68M1.29%+416+3.1%Added
Landmark Wealth Management, LLC13,937$1.68M0.45%+13,937New
Baker Chad R13,950$1.68M0.32%−1,750−11.1%Reduced
Auxano Advisors, LLC13,971$1.68M0.34%−56−0.4%Reduced
Evermay Wealth Management LLC13,921$1.68M0.19%−84−0.6%Reduced
Meridian Financial Partners LLC14,120$1.68M0.64%+231+1.7%Added
SageGuard Financial Group, LLC14,010$1.69M0.26%−270−1.9%Reduced
Lavaca Capital LLC14,014$1.69M0.31%+3,180+29.4%Added
DGS Capital Management, LLC14,018$1.69M0.28%+2,118+17.8%Added
Van Hulzen Asset Management, LLC14,051$1.69M0.13%+1,369+10.8%Added
City State Bank14,052$1.69M0.44%−47−0.3%Reduced
Icon Wealth Advisors, LLC15,258$1.69M0.11%−198−1.3%Reduced
L2 Asset Management, LLC14,105$1.70M0.16%−3,999−22.1%Reduced
Bull Street Advisors, LLC14,123$1.70M0.84%00.0%Unchanged
Cladis Investment Advisory, LLC14,124$1.70M0.93%−550−3.7%Reduced
Texas Bank & Trust Co14,126$1.70M0.64%−1,031−6.8%Reduced
Diversified Enterprises, LLC14,153$1.70M0.09%+721+5.4%Added
Brave Asset Management Inc14,164$1.70M0.40%+430+3.1%Added
Redhawk Wealth Advisors, Inc.14,176$1.71M0.19%−870−5.8%Reduced
Pine Haven Investment Counsel, Inc14,187$1.71M1.25%+50+0.4%Added
Chilton Investment Co LLC14,196$1.71M0.04%−880−5.8%Reduced
Shufro Rose & Co LLC14,197$1.71M0.12%−183−1.3%Reduced
Meiji Yasuda Life Insurance Co14,243$1.71M0.06%+5,800+68.7%Added
Headinvest, LLC14,276$1.72M0.35%−1,722−10.8%Reduced
McDonald Partners LLC14,277$1.72M0.41%+46+0.3%Added
Peregrine Asset Advisers, Inc.14,278$1.72M0.46%−37−0.3%Reduced
44 Wealth Management LLC14,315$1.72M0.60%+14,315New
Colton Groome Financial Advisors, LLC14,325$1.72M0.49%+233+1.7%Added
E&G Advisors, LP14,335$1.72M0.38%+30+0.2%Added
Telos Capital Management, Inc.14,360$1.73M0.17%−816−5.4%Reduced
Platform Technology Partners14,432$1.74M0.33%+1,945+15.6%Added
Exchange Bank14,441$1.74M1.20%00.0%Unchanged
Register Financial Advisors LLC14,468$1.74M0.64%+43+0.3%Added
Cherokee Insurance Co14,498$1.74M0.66%00.0%Unchanged
Bank & Trust Co14,500$1.74M1.18%−98−0.7%Reduced
Wisconsin Capital Management LLC14,510$1.75M0.96%−1,044−6.7%Reduced
Meitav Dash Investments Ltd14,516$1.75M0.02%00.0%Unchanged
NWF Advisory Services Inc.14,568$1.75M0.20%−1,797−11.0%Reduced
Natural Investments, LLC14,589$1.75M0.43%−99−0.7%Reduced
Segment Wealth Management, LLC14,592$1.76M0.10%+602+4.3%Added
Keynote Financial Services LLC14,604$1.76M0.93%−35−0.2%Reduced
Costello Asset Management, INC14,608$1.76M0.61%−831−5.4%Reduced
Diversified Management Inc14,623$1.76M0.30%+5,985+69.3%Added
Meridian Financial, LLC14,634$1.76M0.96%−947−6.1%Reduced
LRI Investments, LLC14,643$1.76M0.16%+1,401+10.6%Added
Acropolis Investment Management, LLC14,643$1.76M0.08%−406−2.7%Reduced
Hager Investment Management Services, LLC14,663$1.76M0.97%−70.0%Reduced
Cascade Financial Partners, LLC14,666$1.76M0.18%−71−0.5%Reduced
OneAscent Financial Services LLC14,671$1.76M0.10%+6,583+81.4%Added
Elgethun Capital Management14,677$1.77M0.29%+2,776+23.3%Added
Umpqua Bank14,703$1.77M0.50%+40.0%Added
Nicholas Hoffman & Company, LLC.14,754$1.77M0.04%−102−0.7%Reduced
Chesapeake Wealth Management14,755$1.77M0.54%+15+0.1%Added
Capital Management Associates, Inc14,778$1.78M0.40%+998+7.2%Added
Scott & Selber, Inc.14,792$1.78M0.46%−394−2.6%Reduced
Grove Bank & Trust14,808$1.78M0.20%−55−0.4%Reduced
Chapin Davis, Inc.14,820$1.78M0.40%+702+5.0%Added
Raleigh Capital Management Inc.14,878$1.79M0.62%+3,412+29.8%Added
Vega Investment Solutions14,924$1.80M0.43%+1,244+9.1%Added
Arvest Bank Trust Division14,982$1.80M0.10%−236−1.6%Reduced
Baker Ellis Asset Management LLC14,988$1.80M0.21%00.0%Unchanged
Quattro Financial Advisors LLC15,000$1.80M0.55%−500−3.2%Reduced
Moss Adams Wealth Advisors LLC14,921$1.81M0.13%+741+5.2%Added
Cassia Capital Partners, LLC15,031$1.81M0.93%+843+5.9%Added
Chesapeake Asset Management LLC15,053$1.81M1.45%−1,113−6.9%Reduced
Beaumont Financial Advisors, LLC15,089$1.82M0.12%+41+0.3%Added
Avaii Wealth Management, LLC15,123$1.82M0.64%−157−1.0%Reduced
St. Johns Investment Management Company, LLC15,158$1.82M0.77%+744+5.2%Added
Csenge Advisory Group15,172$1.83M0.08%+2,051+15.6%Added
Emerald Advisors, LLC15,173$1.83M0.23%+351+2.4%Added
Trust Point Inc.15,181$1.83M0.16%+48+0.3%Added
Mraz, Amerine & Associates, Inc.15,209$1.83M0.27%+10.0%Added
High Net Worth Advisory Group LLC15,215$1.83M0.43%+119+0.8%Added
Am Investment Strategies LLC15,237$1.83M0.40%+218+1.5%Added
Rare Wolf Capital LLC15,249$1.83M1.19%−8,180−34.9%Reduced
United Advisor Group, LLC15,279$1.84M0.23%+437+2.9%Added
Insigneo Advisory Services, LLC15,423$1.86M0.13%−2,178−12.4%Reduced
Sunflower Bank, N.A.15,428$1.86M0.47%−60.0%Reduced
Aspiriant, LLC15,434$1.86M0.05%+251+1.7%Added
Oasis Advisors, LLC15,472$1.86M0.37%+15,472New
Richards, Merrill & Peterson, Inc.15,523$1.87M0.68%−357−2.2%Reduced
Windsor Capital Management, LLC15,582$1.87M0.53%+52+0.3%Added
Summit Wealth Partners, LLC15,653$1.88M0.30%+3,163+25.3%Added
Wills Financial Group LLC16,616$1.89M0.71%−339−2.0%Reduced
Wealth Dimensions Group, Ltd.15,704$1.89M0.37%−815−4.9%Reduced
Founders Financial Alliance, LLC15,752$1.89M0.34%−117−0.7%Reduced
Sentinus, LLC15,789$1.90M0.17%+1,841+13.2%Added
First Interstate Bank15,822$1.90M0.11%−1,377−8.0%Reduced
Abacus Wealth Partners, LLC15,829$1.90M0.17%+792+5.3%Added
South Plains Financial, Inc.15,845$1.91M1.11%+310+2.0%Added
Kavar Capital Partners Group, LLC15,864$1.91M0.24%−10−0.1%Reduced
Processus Wealth & Capital Management, LLC15,873$1.91M1.30%+68+0.4%Added
Abel Hall, LLC15,909$1.91M0.41%+4,520+39.7%Added
IPG Investment Advisors LLC15,827$1.92M0.33%+13,667+632.7%Added
Navalign, LLC15,925$1.92M0.48%+219+1.4%Added
Portfolio Design Labs, LLC15,936$1.92M0.34%−5,582−25.9%Reduced