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: 53; +2 vs. Q2 2026
Shares held: 3.12M; −130.2K (−4.0%) vs. Q2 2026
Total value: $455.5M; +$38.2M (+9.1%) vs. Q2 2026
New holders: 2; 14 more added
Sold out: 0; 30 more reduced

3,804 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	3,812	$231.9B
Q4 2025	3,674	$206.6B
Q3 2025	3,319	$159.8B
Q2 2025	3,337	$155.9B
Q1 2025	3,459	$177.7B
Q4 2024	3,618	$196.9B
Q3 2024	3,501	$221.8B
Q2 2024	3,557	$242.3B
Q1 2024	3,546	$256.9B
Q4 2023	3,443	$211.6B
Q3 2023	3,221	$197.7B
Q2 2023	3,261	$222.8B
Q1 2023	3,187	$205.1B
Q4 2022	3,243	$212.2B
Q3 2022	2,996	$162.7B
Q2 2022	3,019	$171.5B
Q1 2022	2,961	$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
Banque Transatlantique SA	–	–	–	–	Not filed
McMillan Office, Inc.	–	–	–	–	Not filed
Resonant Capital Advisors, LLC	–	–	–	–	Not filed
Kentucky Farm Bureau Mutual Insurance Co	–	–	–	–	Not filed
Stolper Co	–	–	–	–	Not filed
Herold Advisors, Inc.	–	–	–	–	Not filed
Western Wealth Management, LLC	–	–	–	–	Not filed
Kingswood Wealth Advisors, LLC	–	–	–	–	Not filed
Penobscot Investment Management Company, Inc.	–	–	–	–	Not filed
R.H. Dinel Investment Counsel, Inc.	–	–	–	–	Not filed
Investor's Fiduciary Advisor Network, LLC	–	–	–	–	Not filed
W.G. Shaheen & Associates DBA Whitney & Co	–	–	–	–	Not filed
PFG Advisors	–	–	–	–	Not filed
Dymon Asia Capital (Singapore) Pte. Ltd.	–	–	–	–	Not filed
Hudock, Inc.	–	–	–	–	Not filed
MainStreet Investment Advisors LLC	–	–	–	–	Not filed
Quadrant Private Wealth Management, LLC	–	–	–	–	Not filed
DT Investment Partners, LLC	–	–	–	–	Not filed
Providence Capital Advisors, LLC	–	–	–	–	Not filed
Kathmere Capital Management, LLC	–	–	–	–	Not filed
IFP Advisors, Inc	–	–	–	–	Not filed
South State Corp.	–	–	–	–	Not filed
Arvest Investments, Inc.	–	–	–	–	Not filed
Legato Capital Management LLC	–	–	–	–	Not filed
Independence Bank of Kentucky	–	–	–	–	Not filed
Parcion Private Wealth LLC	–	–	–	–	Not filed
Alpha Omega Wealth Management LLC	–	–	–	–	Not filed
Albion Financial Group	–	–	–	–	Not filed
Conscious Wealth Investments, LLC	–	–	–	–	Not filed
S-Bank Fund Management Ltd	–	–	–	–	Not filed
Belpointe Asset Management LLC	–	–	–	–	Not filed
Bridgewater Associates, LP	–	–	–	–	Not filed
EagleClaw Capital Managment, LLC	–	–	–	–	Not filed
Cito Capital Group, LLC	–	–	–	–	Not filed
Allegheny Financial Group LTD	–	–	–	–	Not filed
PKO Investment Management Joint-Stock Co	–	–	–	–	Not filed
Capital Investment Advisory Services, LLC	–	–	–	–	Not filed
Dean Investment Associates, LLC	–	–	–	–	Not filed
Shoker Investment Counsel, Inc.	–	–	–	–	Not filed
Eagle Rock Investment Company, LLC	–	–	–	–	Not filed
Cordatus Wealth Management LLC	–	–	–	–	Not filed
China Universal Asset Management Co., Ltd.	–	–	–	–	Not filed
A. D. Beadell Investment Counsel, Inc.	–	–	–	–	Not filed
Diversify Advisory Services, LLC	–	–	–	–	Not filed
Diversify Wealth Management, LLC	–	–	–	–	Not filed
Rehmann Capital Advisory Group	–	–	–	–	Not filed
Broadwater Capital Management LLC	–	–	–	–	Not filed
Walter & Keenan Financial Consulting Co	–	–	–	–	Not filed
Prevail Innovative Wealth Advisors, LLC	–	–	–	–	Not filed
Central Bank & Trust Co	–	–	–	–	Not filed
National Asset Management, Inc.	–	–	–	–	Not filed
Syon Capital LLC	–	–	–	–	Not filed
VCI Wealth Management LLC	–	–	–	–	Not filed
Chilton Capital Management LLC	–	–	–	–	Not filed
E Fund Management Co., Ltd.	–	–	–	–	Not filed
Gould Capital, LLC	–	–	–	–	Not filed
Peak Retirement Planning, Inc.	–	–	–	–	Not filed
Glass Wealth Management Co LLC	–	–	–	–	Not filed
Ameritas Advisory Services, LLC	–	–	–	–	Not filed
Intrust Bank NA	–	–	–	–	Not filed
Turtle Creek Wealth Advisors, LLC	–	–	–	–	Not filed
Legacy Financial Advisors, Inc.	–	–	–	–	Not filed
Dearborn Partners LLC	–	–	–	–	Not filed
Independent Solutions Wealth Management, LLC	–	–	–	–	Not filed
Werlinich Asset Management, LLC	–	–	–	–	Not filed
Wealth Enhancement Trust Services, Inc.	–	–	–	–	Not filed
Kovack Advisors, Inc.	–	–	–	–	Not filed
Cassaday & Co Wealth Management LLC	–	–	–	–	Not filed
Harvey Investment Co LLC	–	–	–	–	Not filed
Newman Dignan & Sheerar, Inc.	–	–	–	–	Not filed
Global Trust Asset Management, LLC	–	–	–	–	Not filed
J.P. Marvel Investment Advisors, LLC	–	–	–	–	Not filed
Community Financial Services Group, LLC	–	–	–	–	Not filed
Beese Fulmer Investment Management, Inc.	–	–	–	–	Not filed
Heritage Wealth Management, Inc.	–	–	–	–	Not filed
CMH Wealth Management LLC	–	–	–	–	Not filed
Addison Capital Co	–	–	–	–	Not filed
Prudent Man Advisors, LLC	–	–	–	–	Not filed
Keebeck Wealth Management, LLC	–	–	–	–	Not filed
Accurate Wealth Management, LLC	–	–	–	–	Not filed
Essex Savings Bank	–	–	–	–	Not filed
Town & Country Bank & Trust CO dba First Bankers Trust CO	–	–	–	–	Not filed
Malaga Cove Capital, LLC	–	–	–	–	Not filed
Horizon Kinetics Asset Management LLC	–	–	–	–	Not filed
BigSur Wealth Management LLC	–	–	–	–	Not filed
Paradigm Capital Management, LLC	–	–	–	–	Not filed
PW Nova Financial Services LLC	–	–	–	–	Not filed
Cornerstone Planning, LLC	–	–	–	–	Not filed
Generali Investments CEE, investicni spolecnost, a.s.	–	–	–	–	Not filed
Means Investment Co., Inc.	–	–	–	–	Not filed
SNS Financial Group, LLC	–	–	–	–	Not filed
Nicolet Bankshares Inc	–	–	–	–	Not filed
Lynx Capital Group Ltd	–	–	–	–	Not filed
Sax Wealth Advisors, LLC	–	–	–	–	Not filed
WESPAC Advisors, LLC	–	–	–	–	Not filed
Harbor Capital Advisors, Inc.	–	–	–	–	Not filed
Castle Rock Wealth Management, LLC	–	–	–	–	Not filed
Employees Retirement System of Texas	–	–	–	–	Not filed
Garrett Investment Advisors LLC	–	–	–	–	Not filed
Trust Asset Management LLC	–	–	–	–	Not filed