Quest Diagnostics Incorporated

Last updated September 27, 2026

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Organization details

Legal name: Quest Diagnostics Incorporated
Former names: Corning Clinical Laboratories Inc
Ownership: Public
Status: Active
Sector (GICS): Health Care
SIC code: 8071 — Services-Medical Laboratories
Jurisdiction of incorporation: Delaware
Headquarters city: Secaucus
Headquarters state / province: New Jersey
Headquarters country: United States
Fiscal year end: December
Ticker symbol: DGX
Primary stock exchange: NYSE

Identifiers

SEC CIK: 0001022079
EIN: 16-1387862
Wikidata ID: Q7271456

Board of directors

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Denise M. Morrison · Director
Since 2023
Gail R. Wilensky · Director
Since 2023
Gary M. Pfeiffer · Director
Since 2023
J. E. Davis · Director · CEO and President
Since 2023
Luis Diaz · Director
Since 2023
Robert B. Carter · Director
Since 2024
Stephen H. Rusckowski · Director
Since 2023
Timothy C. Wentworth · Director
Since 2026
Timothy L. Main · Director
Since 2023
Timothy M. Ring · Director
Since 2023
Tracey Doi · Director
Since 2023
Vicky B. Gregg · Director
Since 2023
Wright Lassiter III · Director
Since 2023

Chief executives

J. E. Davis · CEO and President

Dates unknown

Director election results

Annual meeting of May 20, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Board connections

6 of this board's directors also sit on 9 other boards. 4 are in the same sector.

Shared director Other board Same sector

Acadia Healthcare Company Inc. Same sector
via Vicky B. Gregg
Baxter International Inc. Same sector
via Stephen H. Rusckowski
Becton Dickinson and Company Same sector
via Timothy M. Ring
Fortive Corporation
via Wright Lassiter III
MetLife Inc.
via Denise M. Morrison
Oracle Corporation
via Stephen H. Rusckowski
Pentair plc.
via Tracey Doi
Tenet Healthcare Corporation Same sector
via Stephen H. Rusckowski
Visa Inc.
via Denise M. Morrison

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months: $0; 0 purchases by 0 insiders
Sold, last 12 months: $42,770,323; 37 sales by 8 insiders

Date	Insider	Transaction	Shares	Price	Value
Nov 3, 2026	DELANEY MARK E Officer (SVP & Chief Commercial Officer)	Grant or award	+2,615	—	—
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Grant or award	+4,827	—	—
Nov 3, 2026	Ramachandran Subu Officer (SVP, Regional Businesses)	Grant or award	+352	—	—
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Option exercise	+22,105	$121.81	$2,692,500
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Open-market sale	−3,818	$245.45	$937,135
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Open-market sale	−5,990	$246.26	$1,475,127
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Open-market sale	−1,151	$246.98	$284,278
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Open-market sale	−2,358	$248.38	$585,689
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Open-market sale	−3,004	$249.40	$749,208
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Open-market sale	−2,877	$250.49	$720,655
Nov 3, 2026	Doherty Catherine T. Officer (Executive Vice President)	Open-market sale	−2,907	$251.24	$730,351
Oct 26, 2026	Gary M. Pfeiffer Director	Open-market sale	−1,203	$243.00	$292,329
Oct 21, 2026	Robert B. Carter Director	Small acquisition	+10	$235.93	$2,359
Oct 21, 2026	DELANEY MARK E Officer (SVP & Chief Commercial Officer)	Small acquisition	+25	$235.94	$5,899
Oct 21, 2026	Vicky B. Gregg Director	Grant or award	+63	$235.94	$14,864

Peers

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Questions about Quest Diagnostics Incorporated

Who is the CEO of Quest Diagnostics Incorporated?

J. E. Davis is Quest Diagnostics Incorporated's CEO and President.

How many directors are on Quest Diagnostics Incorporated's board?

Quest Diagnostics Incorporated's board has 13 directors: Denise M. Morrison, Gail R. Wilensky, Gary M. Pfeiffer, J. E. Davis, Luis Diaz, Robert B. Carter, Stephen H. Rusckowski, Timothy C. Wentworth, Timothy L. Main, Timothy M. Ring and 3 others.

Are Quest Diagnostics Incorporated insiders buying or selling shares?

Over the last 12 months, Quest Diagnostics Incorporated insiders made no open-market purchases and sold $42.8 million of shares in 37 sales on the open market, as reported to the SEC on Forms 4 and 5.

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