SVP & Chief Commercial Officer

Director

Executive Vice President & CFO

Quest Diagnostics is a leading independent provider of diagnostic testing, information, and services in the US. The company generates over 97% of its revenue through clinical testing, anatomic pathology, esoteric testing, and substance abuse testing with specimens collected at its national network of roughly 2,400 patient service centers, as well as multiple doctors offices and hospitals. The firm also runs a much smaller diagnostic solutions segment that provides clinical trials testing, risk-assessment services, and information technology solutions.

Institution	Shares	Value	Change
Artemis Investment Management	467,921	$99M	INCREASED
Eurizon Capital Sgr S.P.a	222,564	$47M	DECREASED
Eastern Bank	189,969	$40M	INCREASED
Cookson Peirce &	155,589	$33M	DECREASED
Achmea Investment Management B.V	124,786	$26M	DECREASED

Insider	Type	Shares	Value	Date
Mark E Delaney (SVP & Chief Commercial Officer)	SELL	1,600	$376K	2026-07-28
Mark E Delaney (SVP & Chief Commercial Officer)	OTHER	34	$7K	2026-07-22
Wright Lassiter III (Director)	OTHER	6	$1K	2026-07-22
Sam Samad (Executive Vice President & CFO)	AWARD	102	$21K	2026-07-22
Timothy L Main (Director)	OTHER	21	$4K	2026-07-22

Quest Diagnostics Inc. (DGX) Ownership & Trading Activity

Top Institutional Holders

Recent Insider Trades

Recent Congressional Trades