DGX

QUEST DIAGNOSTICS INC

Superinvestors

Institutional investors holding DGX

Investor	Fund	Weight	Shares	Value	Quarter
Viking Global Investors	Viking Global Investors	2.22%	1,513,400	$78.2M	2008Q3
Valley Forge Capital Management	Valley Forge Capital Management	1.90%	128,803	$7.5M	2010Q1
William Von Mueffling	Cantillon Capital Management	1.76%	1,148,920	$68.8M	2006Q2
Alex Roepers	Atlantic Investment Management	1.61%	275,000	$13.7M	2010Q2
Robert Olstein	Olstein Capital Management	1.53%	35,800	$7K	2026Q1
Christopher Davis	Davis Selected Advisers	1.46%	1,617,813	$317.1M	2026Q1
Sarah Ketterer	Causeway Capital Management	0.43%	120,400	$20.4M	2025Q1
Bill Nygren	Oakmark Select Fund – Harris Associates	0.41%	4,268,300	$228.5M	2013Q4
Jensen Investment Management	Jensen Investment Management	0.01%	8,070	$490K	2014Q3
Lee Ainslie	Maverick Capital	0.01%	2,756	$540K	2026Q1
Meridian / ArrowMark	Meridian Contrarian Fund	0.01%	3,300	$204K	2013Q3
Kenneth Fisher	Fisher Asset Management	0.00%	1,269	$220K	2025Q4
Richard Pzena	Pzena Investment Management	0.00%	1,966	$241K	2022Q3
First Eagle Investment Management	First Eagle Investment Management	0.00%	3,000	$588K	2026Q1

Congressional Activity

Congressional data coming soon

Insider Activity

5

Total trades

$34K

Volume

5

Buys

0

Sells

Last trade: May 20, 2026

Insider Tradeslast 90 days

Date	Insider	Type	Value
May 20, 2026	Robert B Carter	Buy	–
May 20, 2026	Luis Diaz	Buy	–

Congressional Tradeslast 90 days

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