Merck & Co., Inc.

MRK

Exchange: NYSE
Industry: Pharmaceutical Preparations
SEC CIK: 0000310158

SEC filings (opens in a new tab)

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, Q3 2026

Institutional positions in Merck & Co., Inc. as of Sep 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 (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 11; 0 vs. Q2 2026
Shares held: 764.0K; −1.57K (−0.2%) vs. Q2 2026
Total value: $113.6M; +$15.2M (+15.5%) vs. Q2 2026
New holders: 0; 3 more added
Sold out: 0; 6 more reduced

3,844 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 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 holders

Value held

Institutions holding MRK and their total value by quarter
Quarter	Holders	Value
Q2 2026	3,855	$254.3B
Q1 2026	3,813	$231.9B
Q4 2025	3,675	$206.6B
Q3 2025	3,320	$159.8B
Q2 2025	3,338	$155.9B
Q1 2025	3,460	$177.7B
Q4 2024	3,619	$196.9B
Q3 2024	3,502	$221.8B
Q2 2024	3,558	$242.3B
Q1 2024	3,547	$256.9B
Q4 2023	3,444	$211.6B
Q3 2023	3,222	$197.7B
Q2 2023	3,262	$222.8B
Q1 2023	3,188	$205.1B
Q4 2022	3,244	$212.2B
Q3 2022	2,997	$162.7B
Q2 2022	3,020	$171.5B
Q1 2022	2,962	$152.1B
Q4 2021	2,910	$142.2B
Q3 2021	2,658	$138.8B
Q2 2021	2,684	$144.3B
Q1 2021	2,693	$143.2B

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding Merck & Co., Inc.; share changes are against Q2 2026.

Institutions holding MRK in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
First Trust Advisors LP	–	–	–	–	Not filed
Russell Investments Group, Ltd.	–	–	–	–	Not filed
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	–	–	–	–	Not filed
Jones Financial Companies LLLP	–	–	–	–	Not filed
Alyeska Investment Group, L.P.	–	–	–	–	Not filed
Schroder Investment Management Group	–	–	–	–	Not filed
National Bank of Canada	–	–	–	–	Not filed
Eurizon Capital SGR S.p.A.	–	–	–	–	Not filed
CI Private Wealth, LLC	–	–	–	–	Not filed
Robeco Institutional Asset Management B.V.	–	–	–	–	Not filed
Mackenzie Financial Corp	–	–	–	–	Not filed
Thrivent Financial for Lutherans	–	–	–	–	Not filed
TD Asset Management Inc	–	–	–	–	Not filed
Smead Capital Management, Inc.	–	–	–	–	Not filed
Truist Financial Corp	–	–	–	–	Not filed
Bank of Nova Scotia	–	–	–	–	Not filed
Danske Bank A/S	–	–	–	–	Not filed
State Board of Administration of Florida Retirement System	–	–	–	–	Not filed
Beutel, Goodman & Co Ltd.	–	–	–	–	Not filed
Manufacturers Life Insurance Company, The	–	–	–	–	Not filed
Captrust Financial Advisors	–	–	–	–	Not filed
Mirae Asset Global Investments Co., Ltd.	–	–	–	–	Not filed
Adage Capital Partners GP, L.L.C.	–	–	–	–	Not filed
Cullen Capital Management LLC	–	–	–	–	Not filed
APG Asset Management N.V.	–	–	–	–	Not filed
Handelsbanken Fonder AB	–	–	–	–	Not filed
Citadel Advisors LLC	–	–	–	–	Not filed
Capital Research Global Investors	–	–	–	–	Not filed
New York State Teachers Retirement System	–	–	–	–	Not filed
Prudential Financial Inc	–	–	–	–	Not filed
Brandes Investment Partners, LP	–	–	–	–	Not filed
Universal- Beteiligungs- und Servicegesellschaft mbH	–	–	–	–	Not filed
Korea Investment CORP	–	–	–	–	Not filed
Rockefeller Capital Management L.P.	–	–	–	–	Not filed
Lazard Asset Management LLC	–	–	–	–	Not filed
Nomura Asset Management Co Ltd	–	–	–	–	Not filed
Mitsubishi UFJ Trust & Banking Corp	–	–	–	–	Not filed
SEI Investments Co	–	–	–	–	Not filed
Storebrand Asset Management AS	–	–	–	–	Not filed
Fayez Sarofim & Co	–	–	–	–	Not filed
SEB Asset Management AB	–	–	–	–	Not filed
Janney Montgomery Scott LLC	–	–	–	–	Not filed
Alecta Pensionsforsakring, Omsesidigt	–	–	–	–	Not filed
Great Lakes Advisors, LLC	–	–	–	–	Not filed
Cerity Partners LLC	–	–	–	–	Not filed
US Bancorp	–	–	–	–	Not filed
Quantinno Capital Management LP	–	–	–	–	Not filed
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	–	–	–	–	Not filed
Fifth Third Bancorp	–	–	–	–	Not filed
Zurcher Kantonalbank (Zurich Cantonalbank)	–	–	–	–	Not filed
Mondrian Investment Partners LTD	–	–	–	–	Not filed
Toronto Dominion Bank	–	–	–	–	Not filed
DJE Kapital AG	–	–	–	–	Not filed
Pictet Asset Management Holding SA	–	–	–	–	Not filed
CIBC World Markets Inc.	–	–	–	–	Not filed
M&T Bank Corp	–	–	–	–	Not filed
Wealth Enhancement Advisory Services, LLC	–	–	–	–	Not filed
Candriam Luxembourg S.C.A.	–	–	–	–	Not filed
Asset Management One Co.,Ltd.	–	–	–	–	Not filed
Colony Group, LLC	–	–	–	–	Not filed
Van Eck Associates Corp	–	–	–	–	Not filed
Brown Advisory Inc	–	–	–	–	Not filed
Creative Planning	–	–	–	–	Not filed
PFA Pension, Forsikringsaktieselskab	–	–	–	–	Not filed
Treasurer of the State of North Carolina	–	–	–	–	Not filed
State of Wisconsin Investment Board	–	–	–	–	Not filed
Swiss Life Asset Management Ltd	–	–	–	–	Not filed
Regions Financial Corp	–	–	–	–	Not filed
KLP Kapitalforvaltning AS	–	–	–	–	Not filed
Vanguard Investments Australia, Ltd.	–	–	–	–	Not filed
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund	–	–	–	–	Not filed
Ci Investments Inc.	–	–	–	–	Not filed
Commerce Bank	–	–	–	–	Not filed
Cetera Investment Advisers	–	–	–	–	Not filed
Chevy Chase Trust Holdings, Inc.	–	–	–	–	Not filed
Quilter Plc	–	–	–	–	Not filed
UniSuper Management Pty Ltd	–	–	–	–	Not filed
Kames Capital plc	–	–	–	–	Not filed
CIBC Asset Management Inc	–	–	–	–	Not filed
Commonwealth Equity Services, LLC	–	–	–	–	Not filed
Lazard Freres Gestion S.A.S.	–	–	–	–	Not filed
KBC Group NV	–	–	–	–	Not filed
Woodline Partners LP	–	–	–	–	Not filed
Jane Street Group, LLC	–	–	–	–	Not filed
Macquarie Group Ltd	–	–	–	–	Not filed
Antipodes Partners Ltd	–	–	–	–	Not filed
Zacks Investment Management	–	–	–	–	Not filed
King Luther Capital Management Corp	–	–	–	–	Not filed
Bessemer Group Inc	–	–	–	–	Not filed
Groupama Asset Managment	–	–	–	–	Not filed
Baird Financial Group, Inc.	–	–	–	–	Not filed
STRS Ohio	–	–	–	–	Not filed
Nomura Asset Management International Inc.	–	–	–	–	Not filed
Epoch Investment Partners, Inc.	–	–	–	–	Not filed
Qube Research & Technologies Ltd	–	–	–	–	Not filed
Munich Reinsurance Co Stock Corp in Munich	–	–	–	–	Not filed
DnB Asset Management AS	–	–	–	–	Not filed
Man Group plc	–	–	–	–	Not filed
Public Employees Retirement System of Ohio	–	–	–	–	Not filed
Actiam N.V.	–	–	–	–	Not filed