MRK

Merck & Co., Inc.

Superinvestors

Institutional investors holding MRK

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

Congressional Activity

Congressional data coming soon

Insider Activity

Total trades

$3.8M

Volume

Buys

Sells

Last trade: May 29, 2026

Insider Tradeslast 90 days

Date	Insider	Type	Value
May 29, 2026	Douglas M Baker JR	Buy	$220K
May 29, 2026	Mary Ellen Coe	Buy	$220K

Congressional Tradeslast 90 days

Congressional trade data is being sourced and will appear here shortly.