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: 20; +1 vs. Q2 2026
Shares held: 843.6K; −60.8K (−6.7%) vs. Q2 2026
Total value: $125.1M; +$8.93M (+7.7%) vs. Q2 2026
New holders: 1; 7 more added
Sold out: 0; 9 more reduced

3,836 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
Cambridge Investment Research Advisors, Inc.	–	–	–	–	Not filed
BI Asset Management Fondsmaeglerselskab A/S	–	–	–	–	Not filed
SRB Corp	–	–	–	–	Not filed
PensionDanmark Pensionsforsikringsaktieselskab	–	–	–	–	Not filed
GWM Advisors LLC	–	–	–	–	Not filed
Capital International Inc	–	–	–	–	Not filed
Alps Advisors Inc	–	–	–	–	Not filed
AIA Group Ltd	–	–	–	–	Not filed
Tocqueville Asset Management L.P.	–	–	–	–	Not filed
Fukoku Mutual Life Insurance Co	–	–	–	–	Not filed
Boston Trust Walden Corp	–	–	–	–	Not filed
MML Investors Services, LLC	–	–	–	–	Not filed
B. Metzler seel. Sohn & Co. AG	–	–	–	–	Not filed
Nichols & Pratt Advisers LLP	–	–	–	–	Not filed
Saudi Central Bank	–	–	–	–	Not filed
Amalgamated Bank	–	–	–	–	Not filed
Gateway Investment Advisers LLC	–	–	–	–	Not filed
USS Investment Management Ltd	–	–	–	–	Not filed
QRG Capital Management, Inc.	–	–	–	–	Not filed
S&CO Inc	–	–	–	–	Not filed
JustInvest LLC	–	–	–	–	Not filed
CORDA Investment Management, LLC.	–	–	–	–	Not filed
Vaughan David Investments LLC	–	–	–	–	Not filed
Fideuram - Intesa Sanpaolo Private Banking S.P.A.	–	–	–	–	Not filed
Systematic Alpha Investments, LLC	–	–	–	–	Not filed
Rakuten Investment Management, Inc.	–	–	–	–	Not filed
NEOS Investment Management LLC	–	–	–	–	Not filed
Public Sector Pension Investment Board	–	–	–	–	Not filed
Fiduciary Trust Co	–	–	–	–	Not filed
Raiffeisen Bank International AG	–	–	–	–	Not filed
Edmond de Rothschild Holding S.A.	–	–	–	–	Not filed
Varma Mutual Pension Insurance Co	–	–	–	–	Not filed
Panagora Asset Management Inc	–	–	–	–	Not filed
United Super Pty Ltd in its capacity as Trustee for the Construction & Building Unions Superannuation Fund	–	–	–	–	Not filed
Huntington National Bank	–	–	–	–	Not filed
Glenmede Trust Co NA	–	–	–	–	Not filed
Andra AP-fonden	–	–	–	–	Not filed
Northwestern Mutual Wealth Management Co	–	–	–	–	Not filed
Vontobel Holding Ltd.	–	–	–	–	Not filed
Meyer Handelman Co	–	–	–	–	Not filed
Glenview Trust Co	–	–	–	–	Not filed
Lido Advisors, LLC	–	–	–	–	Not filed
MAI Capital Management	–	–	–	–	Not filed
Point72 Asset Management, L.P.	–	–	–	–	Not filed
Illinois Municipal Retirement Fund	–	–	–	–	Not filed
RMB Capital Management, LLC	–	–	–	–	Not filed
Distillate Capital Partners LLC	–	–	–	–	Not filed
Ferguson Wellman Capital Management, Inc	–	–	–	–	Not filed
Capital Investment Advisors, LLC	–	–	–	–	Not filed
Utah Retirement Systems	–	–	–	–	Not filed
Life Cycle Investment Partners Ltd	–	–	–	–	Not filed
Police & Firemen's Retirement System of New Jersey	–	–	–	–	Not filed
British Columbia Investment Management Corp	–	–	–	–	Not filed
Sanctuary Advisors, LLC	–	–	–	–	Not filed
La Banque Postale Asset Management SA	–	–	–	–	Not filed
Banco Bilbao Vizcaya Argentaria, S.A.	–	–	–	–	Not filed
Westwood Holdings Group Inc.	–	–	–	–	Not filed
Ilmarinen Mutual Pension Insurance Co	–	–	–	–	Not filed
Allspring Global Investments Holdings, LLC	–	–	–	–	Not filed
Beacon Pointe Advisors, LLC	–	–	–	–	Not filed
Jefferies Financial Group Inc.	–	–	–	–	Not filed
Smith Chas P & Associates Pa Cpas	–	–	–	–	Not filed
Ethic Inc.	–	–	–	–	Not filed
Integral Health Asset Management, LLC	–	–	–	–	Not filed
Letko, Brosseau & Associates Inc	–	–	–	–	Not filed
Advisors Asset Management, Inc.	–	–	–	–	Not filed
TD Waterhouse Canada Inc.	–	–	–	–	Not filed
Conning Inc.	–	–	–	–	Not filed
Waters Parkerson & Co., LLC	–	–	–	–	Not filed
Prudential PLC	–	–	–	–	Not filed
Mirae Asset Global ETFs Holdings Ltd.	–	–	–	–	Not filed
New York Life Investment Management LLC	–	–	–	–	Not filed
Nissay Asset Management Corp	–	–	–	–	Not filed
Loring Wolcott & Coolidge Fiduciary Advisors LLP	–	–	–	–	Not filed
Kempen Capital Management N.V.	–	–	–	–	Not filed
Pinnacle Financial Partners, Inc.	–	–	–	–	Not filed
Kestra Advisory Services, LLC	–	–	–	–	Not filed
Norris Perne & French LLP	–	–	–	–	Not filed
Steward Partners Investment Advisory, LLC	–	–	–	–	Not filed
Wealthfront Advisers LLC	–	–	–	–	Not filed
Welch & Forbes LLC	–	–	–	–	Not filed
Heritage Investors Management Corp	–	–	–	–	Not filed
Public Employees Retirement Association of Colorado	–	–	–	–	Not filed
Willis Investment Counsel	–	–	–	–	Not filed
Northwest & Ethical Investments L.P.	–	–	–	–	Not filed
Cullen/Frost Bankers, Inc.	–	–	–	–	Not filed
Abn Amro Investment Solutions	–	–	–	–	Not filed
Howard Capital Management Group, LLC	–	–	–	–	Not filed
Healthcare of Ontario Pension Plan Trust Fund	–	–	–	–	Not filed
Oregon Public Employees Retirement Fund	–	–	–	–	Not filed
Generali Asset Management SPA SGR	–	–	–	–	Not filed
Private Wealth Partners, LLC	–	–	–	–	Not filed
Vinva Investment Management Ltd	–	–	–	–	Not filed
Avanza Fonder AB	–	–	–	–	Not filed
State of Alaska, Department of Revenue	–	–	–	–	Not filed
Teachers Retirement System of the State of Kentucky	–	–	–	–	Not filed
Voleon Capital Management LP	–	–	–	–	Not filed
Elo Mutual Pension Insurance Co	–	–	–	–	Not filed
Sequoia Financial Advisors, LLC	–	–	–	–	Not filed
Douglass Winthrop Advisors, LLC	–	–	–	–	Not filed