MRK

Merck & Co. Inc.

$120.29

Closing price as of Mar 31, 2026

24 superinvestors own MRK

Based on latest 13F filings — data is 45–90 days delayed

Investor	Fund	Weight	Shares	Value	Quarter	Activity
Kahn Brothers Group	Kahn Brothers Group	4.85%	227,288	$27.3M	2026Q1	Reduced
Hillman Capital Management	Hillman Value Fund	2.38%	66,707	$5.7M	2022Q3	Reduced
Valley Forge Capital Management	Valley Forge Capital Management	2.05%	167,290	$6.2M	2010Q3	New
Harry Burn	Sound Shore	2.02%	547,423	$62.2M	2024Q3	Added
Bill Nygren	Oakmark Select Fund – Harris Associates	1.98%	12,366,933	$1.5B	2026Q1	Reduced
David Tepper	Appaloosa Management	1.76%	2,113,620	$74.6M	2011Q2	Reduced
Sarah Ketterer	Causeway Capital Management	1.26%	854,212	$102.8M	2026Q1	Reduced
Kenneth Fisher	Fisher Asset Management	1.08%	26,436,284	$3.2B	2026Q1	Added
Prem Watsa	Fairfax Financial Holdings	1.07%	172,900	$20.8M	2026Q1	Held
Chuck Akre	Akre Capital Management	0.62%	7,700	$584K	2001Q1	Held
William Von Mueffling	Cantillon Capital Management	0.39%	390,223	$16.4M	2006Q3	Reduced
Warren Buffett	Berkshire Hathaway	0.24%	9,157,192	$712.2M	2021Q2	Reduced
Mairs & Power	Mairs & Power Growth Fund	0.06%	50,348	$6.1M	2026Q1	Reduced
David Katz	Matrix Asset Advisors	0.02%	1,671	$201K	2026Q1	Reduced
Tweedy Browne Co.	Tweedy Browne Value Fund	0.01%	3,306	$274K	2020Q3	Held
Ruane Cunniff	Sequoia Fund	0.01%	23,954	$670K	2009Q2	Held
Jensen Investment Management	Jensen Investment Management	0.01%	7,560	$436K	2016Q2	Reduced
Dodge & Cox	Dodge & Cox	0.01%	136,050	$16.4M	2026Q1	Reduced
Christopher Davis	Davis Selected Advisers	0.00%	35,191	$1.6M	2012Q3	Reduced
Richard Pzena	Pzena Investment Management	0.00%	2,511	$302K	2026Q1	Reduced
Meridian / ArrowMark	Meridian Contrarian Fund	0.00%	6,000	$463K	2021Q1	Held
First Eagle Investment Management	First Eagle Investment Management	0.00%	33,790	$1.9M	2017Q4	Added
Bill & Melinda Gates Foundation	Bill & Melinda Gates Foundation Trust	0.00%	17,740	$1.8M	2023Q3	New
Thomas Russo	Gardner Russo & Quinn	0.00%	2,141	$258K	2026Q1	New

Recent insider activity — MRK

Open-market purchases (P) and sales (S) from SEC Form 4 filings · last 12 months

No open-market insider trades in the last 12 months.

Form 4 filings for option exercises and other transaction types are excluded.

Congressional trades — MRK

STOCK Act disclosures · last 12 months

Congressional trade data coming soon.

We are sourcing STOCK Act disclosures and will display them here shortly.

Learn more

What Is SEC Form 4?

Understand the insider trade filings behind MRK activity.

What Is a 13F Filing?

How superinvestors disclose their quarterly holdings.

Insider Cluster Buying

Why multiple insiders buying together is a strong signal.

Superinvestor Consensus

The most widely held stocks across all tracked institutions.