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: 43; +2 vs. Q2 2026
Shares held: 3.01M; −129.5K (−4.1%) vs. Q2 2026
Total value: $439.3M; +$36.4M (+9.0%) vs. Q2 2026
New holders: 2; 12 more added
Sold out: 0; 23 more reduced

3,814 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
Walled Lake Planning & Wealth Management, LLC	–	–	–	–	Not filed
Sentry LLC	–	–	–	–	Not filed
Leuthold Group, LLC	–	–	–	–	Not filed
Ironwood Investment Counsel, LLC	–	–	–	–	Not filed
Equitable Trust Co	–	–	–	–	Not filed
Hengehold Capital Management LLC	–	–	–	–	Not filed
Ritholtz Wealth Management	–	–	–	–	Not filed
Citizens Business Bank	–	–	–	–	Not filed
Motco	–	–	–	–	Not filed
Modera Wealth Management, LLC	–	–	–	–	Not filed
Great Valley Advisor Group, Inc.	–	–	–	–	Not filed
Ipswich Investment Management Co., Inc.	–	–	–	–	Not filed
Mather Group, LLC.	–	–	–	–	Not filed
Artia Global Partners LP	–	–	–	–	Not filed
Cullinan Associates Inc	–	–	–	–	Not filed
Westerkirk Capital Inc.	–	–	–	–	Not filed
Arnhold LLC	–	–	–	–	Not filed
HORAN Wealth, LLC	–	–	–	–	Not filed
Martin Investment Management, LLC	–	–	–	–	Not filed
V-Square Quantitative Management LLC	–	–	–	–	Not filed
Savvy Advisors, Inc.	–	–	–	–	Not filed
Chatham Capital Group, Inc.	–	–	–	–	Not filed
Howland Capital Management LLC	–	–	–	–	Not filed
Nordwand Advisors, LLC	–	–	–	–	Not filed
Citizens National Bank Trust Department	–	–	–	–	Not filed
Sigma Planning Corp	–	–	–	–	Not filed
Venture Visionary Partners LLC	–	–	–	–	Not filed
Whitener Capital Management, Inc.	–	–	–	–	Not filed
Finer Wealth Management, Inc.	–	–	–	–	Not filed
Smith, Salley & Associates	–	–	–	–	Not filed
Norden Group LLC	–	–	–	–	Not filed
Zions Bancorporation, National Association	–	–	–	–	Not filed
Bontempo Ohly Capital Mgmt LLC	–	–	–	–	Not filed
Valley National Advisers Inc	–	–	–	–	Not filed
Morgan Dempsey Capital Management LLC	–	–	–	–	Not filed
180 Wealth Advisors, LLC	–	–	–	–	Not filed
Boston Private Wealth LLC	–	–	–	–	Not filed
West Michigan Advisors, LLC	–	–	–	–	Not filed
Semper Augustus Investments Group LLCSuperinvestorSemper Augustus	–	–	–	–	Not filed
Independent Financial Group, LLC	–	–	–	–	Not filed
BOCHK Asset Management Ltd	–	–	–	–	Not filed
Spinnaker Trust	–	–	–	–	Not filed
Bell & Brown Wealth Advisors, LLC	–	–	–	–	Not filed
Sandhill Capital Partners LLC	–	–	–	–	Not filed
McGinn Investment Management, Inc.	–	–	–	–	Not filed
LMR Partners LLP	–	–	–	–	Not filed
Cliftonlarsonallen Wealth Advisors, LLC	–	–	–	–	Not filed
Rench Wealth Management, Inc.	–	–	–	–	Not filed
Joel Isaacson & Co., LLC	–	–	–	–	Not filed
Prime Capital Investment Advisors, LLC	–	–	–	–	Not filed
Montgomery Investment Management Inc	–	–	–	–	Not filed
Financial Advisory Service, Inc.	–	–	–	–	Not filed
Essex Financial Services, Inc.	–	–	–	–	Not filed
Romano Brothers and Company	–	–	–	–	Not filed
Boston Family Office LLC	–	–	–	–	Not filed
OpenArc Corporate Advisory, LLC	–	–	–	–	Not filed
Chicago Trust Co NA	–	–	–	–	Not filed
Clear Harbor Asset Management, LLC	–	–	–	–	Not filed
Advisortrust Partners, LLC	–	–	–	–	Not filed
Thrive Capital Management, LLC	–	–	–	–	Not filed
StoneX Group Inc.	–	–	–	–	Not filed
Thomasville National Bank	–	–	–	–	Not filed
Pincus Capital Management, LP	–	–	–	–	Not filed
Roundview Capital LLC	–	–	–	–	Not filed
Mitchell Sinkler & Starr	–	–	–	–	Not filed
AMG National Trust Bank	–	–	–	–	Not filed
Uncommon Cents Investing LLC	–	–	–	–	Not filed
Aviance Capital Partners, LLC	–	–	–	–	Not filed
Leavell Investment Management, Inc.	–	–	–	–	Not filed
Aware Super Pty Ltd as trustee of Aware Super	–	–	–	–	Not filed
Castlefield Investment Partners LLP	–	–	–	–	Not filed
Change Path, LLC	–	–	–	–	Not filed
Ronald Blue Trust, Inc.	–	–	–	–	Not filed
First Pacific Financial	–	–	–	–	Not filed
Strengthening Families & Communities, LLC	–	–	–	–	Not filed
apricus wealth, LLC	–	–	–	–	Not filed
Ascent Group, LLC	–	–	–	–	Not filed
Grimes & Company, Inc.	–	–	–	–	Not filed
ACR Alpine Capital Research, LLC	–	–	–	–	Not filed
Studio Investment Management LLC	–	–	–	–	Not filed
Atlanta Consulting Group Advisors, LLC	–	–	–	–	Not filed
Twin Capital Management Inc	–	–	–	–	Not filed
Baader Bank INC	–	–	–	–	Not filed
Krilogy Financial LLC	–	–	–	–	Not filed
Harbour Investments, Inc.	–	–	–	–	Not filed
Smartleaf Asset Management LLC	–	–	–	–	Not filed
WealthTrust Axiom LLC	–	–	–	–	Not filed
Trilogy Capital Inc.	–	–	–	–	Not filed
Core Alternative Capital	–	–	–	–	Not filed
Patton Albertson Miller Group, LLC	–	–	–	–	Not filed
Community Bank & Trust, Waco, Texas	–	–	–	–	Not filed
Chicago Partners Investment Group LLC	–	–	–	–	Not filed
Asset Advisors Investment Management, LLC	–	–	–	–	Not filed
LGT Fund Management Co Ltd.	–	–	–	–	Not filed
Mesirow Financial Investment Management, Inc.	–	–	–	–	Not filed
Morton Community Bank	–	–	–	–	Not filed
Petredis Investment Advisors LLC	–	–	–	–	Not filed
Global Financial Private Client, LLC	–	–	–	–	Not filed
Catalytic Wealth RIA, LLC	–	–	–	–	Not filed
Evergreen Wealth Solutions, LLC	–	–	–	–	Not filed