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Quest Diagnostics Inc(DGX US)

$241.89-1.390.57%Ext:$235.80-6.092.52%(Market Closed · 00:00:03 UTC)

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DGX US​

SEC Filings by Owner

Insider Ownership

PREVOZNIK MICHAEL E(112)

  • 4Statement of changes in beneficial ownership31 Aug
  • 4Statement of changes in beneficial ownership6 Mar
  • 4Statement of changes in beneficial ownership4 Mar
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership30 Sep 2025
  • 4Statement of changes in beneficial ownership25 Sep 2025
  • 4Statement of changes in beneficial ownership19 Mar 2025
  • 4Statement of changes in beneficial ownership5 Mar 2025
  • 4Statement of changes in beneficial ownership28 Feb 2025
  • 4Statement of changes in beneficial ownership21 Feb 2025

Doherty Catherine T.(81)

  • 4Statement of changes in beneficial ownership6 Mar
  • 4Statement of changes in beneficial ownership4 Mar
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership17 Feb
  • 4Statement of changes in beneficial ownership7 Mar 2025
  • 4Statement of changes in beneficial ownership5 Mar 2025
  • 4Statement of changes in beneficial ownership28 Feb 2025
  • 4Statement of changes in beneficial ownership21 Feb 2025
  • 4Statement of changes in beneficial ownership14 Feb 2025
  • 4Statement of changes in beneficial ownership2 Dec 2024

RING TIMOTHY M(73)

  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership3 Oct 2025
  • 4Statement of changes in beneficial ownership2 Jul 2025
  • 4Statement of changes in beneficial ownership19 May 2025
  • 4Statement of changes in beneficial ownership3 Apr 2025
  • 4Statement of changes in beneficial ownership6 Jan 2025
  • 4Statement of changes in beneficial ownership3 Oct 2024
  • 4Statement of changes in beneficial ownership2 Jul 2024
  • 4Statement of changes in beneficial ownership20 May 2024
  • 4Statement of changes in beneficial ownership3 Apr 2024

HAGEMANN ROBERT(61)

  • 4PRIMARY DOCUMENT7 Mar 2013
  • 4PRIMARY DOCUMENT6 Mar 2013
  • 4PRIMARY DOCUMENT27 Feb 2013
  • 4PRIMARY DOCUMENT19 Feb 2013
  • 4PRIMARY DOCUMENT12 Feb 2013
  • 4PRIMARY DOCUMENT5 Oct 2012
  • 4PRIMARY DOCUMENT3 Apr 2012
  • 4PRIMARY DOCUMENT2 Mar 2012
  • 4PRIMARY DOCUMENT29 Feb 2012
  • 4PRIMARY DOCUMENT16 Feb 2012

RUSCKOWSKI STEPHEN H(58)

  • 4Statement of changes in beneficial ownership8 Mar 2023
  • 4Statement of changes in beneficial ownership1 Mar 2023
  • 4Statement of changes in beneficial ownership27 Feb 2023
  • 4Statement of changes in beneficial ownership26 May 2022
  • 4Statement of changes in beneficial ownership25 May 2022
  • 4Statement of changes in beneficial ownership9 Mar 2022
  • 4Statement of changes in beneficial ownership28 Feb 2022
  • 4Statement of changes in beneficial ownership25 Feb 2022
  • 4Statement of changes in beneficial ownership30 Jul 2021
  • 4Statement of changes in beneficial ownership28 Jul 2021

Davis J. E.(58)

  • 4Statement of changes in beneficial ownership3 Sep
  • 4Statement of changes in beneficial ownership2 Jun
  • 4Statement of changes in beneficial ownership6 Mar
  • 4Statement of changes in beneficial ownership4 Mar
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership28 Nov 2025
  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership4 Apr 2025
  • 4Statement of changes in beneficial ownership5 Mar 2025
  • 4Statement of changes in beneficial ownership28 Feb 2025

BONGIORNO THOMAS F(56)

  • 4Statement of changes in beneficial ownership3 Mar 2015
  • 4Statement of changes in beneficial ownership18 Feb 2015
  • 4Statement of changes in beneficial ownership4 Feb 2015
  • 4Statement of changes in beneficial ownership20 Nov 2014
  • 4PRIMARY DOCUMENT29 Jul 2014
  • 4PRIMARY DOCUMENT3 Mar 2014
  • 4PRIMARY DOCUMENT27 Feb 2014
  • 4PRIMARY DOCUMENT18 Feb 2014
  • 4PRIMARY DOCUMENT5 Nov 2013
  • 4PRIMARY DOCUMENT30 Oct 2013

FREEMAN KENNETH W/NJ(56)

  • 4PRIMARY DOCUMENT14 Dec 2004
  • 4PRIMARY DOCUMENT10 Dec 2004
  • 4PRIMARY DOCUMENT2 Dec 2004
  • 4PRIMARY DOCUMENT26 Nov 2004
  • 4PRIMARY DOCUMENT18 Nov 2004
  • 4PRIMARY DOCUMENT12 Nov 2004
  • 4PRIMARY DOCUMENT4 Nov 2004
  • 4PRIMARY DOCUMENT28 Oct 2004
  • 4PRIMARY DOCUMENT21 Oct 2004
  • 4PRIMARY DOCUMENT14 Oct 2004

MOHAPATRA SURYA N(45)

  • 4PRIMARY DOCUMENT2 May 2012
  • 4PRIMARY DOCUMENT2 Mar 2012
  • 4PRIMARY DOCUMENT17 Feb 2012
  • 4PRIMARY DOCUMENT14 Feb 2012
  • 4PRIMARY DOCUMENT1 Feb 2012
  • 4PRIMARY DOCUMENT30 Jan 2012
  • 4PRIMARY DOCUMENT4 Jan 2012
  • 4PRIMARY DOCUMENT2 Dec 2011
  • 4PRIMARY DOCUMENT3 Nov 2011
  • 4PRIMARY DOCUMENT1 Nov 2011

ZIEGLER JOHN B(42)

  • 4Statement of changes in beneficial ownership24 Feb 2017
  • 4Statement of changes in beneficial ownership27 Jul 2016
  • 4Statement of changes in beneficial ownership19 May 2016
  • 4Statement of changes in beneficial ownership5 Jan 2016
  • 4Statement of changes in beneficial ownership10 Aug 2015
  • 4Statement of changes in beneficial ownership19 May 2015
  • 4Statement of changes in beneficial ownership4 Feb 2015
  • 4PRIMARY DOCUMENT28 Jul 2014
  • 4PRIMARY DOCUMENT22 May 2014
  • 4PRIMARY DOCUMENT12 Aug 2013

GUINAN MARK(42)

  • 4Statement of changes in beneficial ownership9 Mar 2022
  • 4Statement of changes in beneficial ownership28 Feb 2022
  • 4Statement of changes in beneficial ownership25 Feb 2022
  • 4Statement of changes in beneficial ownership11 Mar 2021
  • 4Statement of changes in beneficial ownership25 Feb 2021
  • 4Statement of changes in beneficial ownership19 Feb 2021
  • 4Statement of changes in beneficial ownership28 Dec 2020
  • 4Statement of changes in beneficial ownership10 Jun 2020
  • 4Statement of changes in beneficial ownership12 Mar 2020
  • 4Statement of changes in beneficial ownership27 Feb 2020

PFEIFFER GARY M(41)

  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership24 Oct 2025
  • 4Statement of changes in beneficial ownership19 May 2025
  • 4Statement of changes in beneficial ownership20 May 2024
  • 4Statement of changes in beneficial ownership19 May 2023
  • 4Statement of changes in beneficial ownership20 May 2022
  • 4Statement of changes in beneficial ownership25 May 2021
  • 4Statement of changes in beneficial ownership21 May 2020
  • 4Statement of changes in beneficial ownership16 May 2019
  • 4Statement of changes in beneficial ownership17 May 2018

KUPPUSAMY KARTHIK(40)

  • 4Statement of changes in beneficial ownership23 Oct
  • 4Statement of changes in beneficial ownership27 Jul
  • 4Statement of changes in beneficial ownership8 Jun
  • 4Statement of changes in beneficial ownership24 Apr
  • 4Statement of changes in beneficial ownership6 Mar
  • 4Statement of changes in beneficial ownership4 Mar
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership24 Oct 2025
  • 4Statement of changes in beneficial ownership15 Aug 2025
  • 4Statement of changes in beneficial ownership1 Aug 2025

Cohen Jon R(38)

  • 4Statement of changes in beneficial ownership12 Mar 2018
  • 4Statement of changes in beneficial ownership6 Mar 2018
  • 4Statement of changes in beneficial ownership1 Mar 2018
  • 4Statement of changes in beneficial ownership27 Feb 2018
  • 4Statement of changes in beneficial ownership21 Feb 2018
  • 4Statement of changes in beneficial ownership3 Aug 2017
  • 4Statement of changes in beneficial ownership21 Jun 2017
  • 4Statement of changes in beneficial ownership3 Mar 2017
  • 4Statement of changes in beneficial ownership2 Mar 2017
  • 4Statement of changes in beneficial ownership28 Feb 2017

Plewman Patrick(38)

  • 4Statement of changes in beneficial ownership23 Oct
  • 4Statement of changes in beneficial ownership27 Jul
  • 4Statement of changes in beneficial ownership24 Apr
  • 4Statement of changes in beneficial ownership6 Mar
  • 4Statement of changes in beneficial ownership4 Mar
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership12 Feb
  • 4Statement of changes in beneficial ownership24 Oct 2025
  • 4Statement of changes in beneficial ownership25 Aug 2025
  • 4Statement of changes in beneficial ownership21 Aug 2025

Gregg Vicky B(36)

  • 4Statement of changes in beneficial ownership23 Oct
  • 4Statement of changes in beneficial ownership27 Jul
  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership24 Apr
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership28 Nov 2025
  • 4Statement of changes in beneficial ownership24 Oct 2025
  • 4Statement of changes in beneficial ownership25 Jul 2025
  • 4Statement of changes in beneficial ownership19 May 2025
  • 4Statement of changes in beneficial ownership2 May 2025

WILENSKY GAIL R(35)

  • 4Statement of changes in beneficial ownership19 May 2023
  • 4Statement of changes in beneficial ownership20 May 2022
  • 4Statement of changes in beneficial ownership28 Jul 2021
  • 4Statement of changes in beneficial ownership25 May 2021
  • 4Statement of changes in beneficial ownership27 Nov 2020
  • 4Statement of changes in beneficial ownership21 May 2020
  • 4Statement of changes in beneficial ownership27 Nov 2019
  • 4Statement of changes in beneficial ownership16 May 2019
  • 4Statement of changes in beneficial ownership25 Feb 2019
  • 4Statement of changes in beneficial ownership17 May 2018

Miller Joan Elizabeth(35)

  • 4PRIMARY DOCUMENT2 Mar 2012
  • 4PRIMARY DOCUMENT29 Feb 2012
  • 4PRIMARY DOCUMENT27 Feb 2012
  • 4PRIMARY DOCUMENT16 Feb 2012
  • 4PRIMARY DOCUMENT14 Feb 2012
  • 4PRIMARY DOCUMENT7 Feb 2012
  • 4PRIMARY DOCUMENT1 Nov 2011
  • 4PRIMARY DOCUMENT20 Jun 2011
  • 4PRIMARY DOCUMENT16 Jun 2011
  • 4PRIMARY DOCUMENT14 Jun 2011

Deppe Michael J(33)

  • 4Statement of changes in beneficial ownership6 Mar
  • 4Statement of changes in beneficial ownership4 Mar
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership5 Mar 2025
  • 4Statement of changes in beneficial ownership28 Feb 2025
  • 4Statement of changes in beneficial ownership21 Feb 2025
  • 4Statement of changes in beneficial ownership14 Feb 2025
  • 4Statement of changes in beneficial ownership7 Nov 2024
  • 4Statement of changes in beneficial ownership1 Mar 2024
  • 4Statement of changes in beneficial ownership27 Feb 2024

Cunningham Everett(32)

  • 4Statement of changes in beneficial ownership5 Mar 2019
  • 4Statement of changes in beneficial ownership28 Feb 2019
  • 4Statement of changes in beneficial ownership27 Feb 2019
  • 4Statement of changes in beneficial ownership25 Feb 2019
  • 4Statement of changes in beneficial ownership20 Feb 2019
  • 4Statement of changes in beneficial ownership12 Jul 2018
  • 4Statement of changes in beneficial ownership5 Jul 2018
  • 4Statement of changes in beneficial ownership6 Mar 2018
  • 4Statement of changes in beneficial ownership25 Mar 2019
  • 4Statement of changes in beneficial ownership1 Mar 2018

STANZIONE DANIEL(27)

  • 4Statement of changes in beneficial ownership24 Nov 2020
  • 4Statement of changes in beneficial ownership21 May 2020
  • 4Statement of changes in beneficial ownership16 May 2019
  • 4Statement of changes in beneficial ownership17 May 2018
  • 4Statement of changes in beneficial ownership13 Sep 2017
  • 4Statement of changes in beneficial ownership7 Sep 2017
  • 4Statement of changes in beneficial ownership18 May 2017
  • 4Statement of changes in beneficial ownership19 May 2016
  • 4Statement of changes in beneficial ownership19 May 2015
  • 4Statement of changes in beneficial ownership12 Feb 2015

DELANEY MARK E(27)

  • 4Statement of changes in beneficial ownership23 Oct
  • 4Statement of changes in beneficial ownership29 Jul
  • 4Statement of changes in beneficial ownership27 Jul
  • 4Statement of changes in beneficial ownership24 Apr
  • 4Statement of changes in beneficial ownership6 Mar
  • 4Statement of changes in beneficial ownership4 Mar
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership20 Nov 2025
  • 4Statement of changes in beneficial ownership24 Oct 2025
  • 4Statement of changes in beneficial ownership25 Jul 2025

BRITELL JENNE K(26)

  • 4Statement of changes in beneficial ownership6 Jun 2018
  • 4Statement of changes in beneficial ownership17 May 2018
  • 4Statement of changes in beneficial ownership18 May 2017
  • 4Statement of changes in beneficial ownership26 Apr 2017
  • 4Statement of changes in beneficial ownership22 Aug 2016
  • 4Statement of changes in beneficial ownership11 Aug 2016
  • 4Statement of changes in beneficial ownership19 May 2016
  • 4Statement of changes in beneficial ownership16 May 2016
  • 4Statement of changes in beneficial ownership5 Jan 2016
  • 4Statement of changes in beneficial ownership19 May 2015

Klug Robert A(26)

  • 4Statement of changes in beneficial ownership5 Mar 2019
  • 4Statement of changes in beneficial ownership28 Feb 2019
  • 4Statement of changes in beneficial ownership27 Feb 2019
  • 4Statement of changes in beneficial ownership25 Feb 2019
  • 4Statement of changes in beneficial ownership20 Feb 2019
  • 4Statement of changes in beneficial ownership16 Oct 2018
  • 4Statement of changes in beneficial ownership21 Aug 2018
  • 4Statement of changes in beneficial ownership6 Mar 2018
  • 4Statement of changes in beneficial ownership1 Mar 2018
  • 4Statement of changes in beneficial ownership27 Feb 2018

SAMAD SAM(26)

  • 4Statement of changes in beneficial ownership23 Oct
  • 4Statement of changes in beneficial ownership27 Jul
  • 4Statement of changes in beneficial ownership24 Apr
  • 4Statement of changes in beneficial ownership6 Mar
  • 4Statement of changes in beneficial ownership4 Mar
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership24 Oct 2025
  • 4Statement of changes in beneficial ownership25 Jul 2025
  • 4Statement of changes in beneficial ownership17 Jul 2025
  • 4Statement of changes in beneficial ownership2 May 2025

BALDWIN JOHN C MD(23)

  • 4Statement of changes in beneficial ownership13 Aug 2015
  • 4Statement of changes in beneficial ownership19 May 2015
  • 4PRIMARY DOCUMENT29 Jul 2014
  • 4PRIMARY DOCUMENT22 May 2014
  • 4PRIMARY DOCUMENT5 Nov 2013
  • 4PRIMARY DOCUMENT4 Nov 2013
  • 4PRIMARY DOCUMENT23 May 2013
  • 4PRIMARY DOCUMENT15 May 2013
  • 4PRIMARY DOCUMENT9 Aug 2012
  • 4PRIMARY DOCUMENT15 May 2012

EGLINTON MANNER CARRIE(22)

  • 4Statement of changes in beneficial ownership9 Mar 2022
  • 4Statement of changes in beneficial ownership28 Feb 2022
  • 4Statement of changes in beneficial ownership25 Feb 2022
  • 4Statement of changes in beneficial ownership11 Mar 2021
  • 4Statement of changes in beneficial ownership25 Feb 2021
  • 4Statement of changes in beneficial ownership19 Feb 2021
  • 4Statement of changes in beneficial ownership7 Jan 2021
  • 4Statement of changes in beneficial ownership27 Apr 2020
  • 4Statement of changes in beneficial ownership12 Mar 2020
  • 4Statement of changes in beneficial ownership27 Feb 2020

GRANT WILLIAM R(21)

  • 4PRIMARY DOCUMENT3 Apr 2007
  • 4PRIMARY DOCUMENT27 Feb 2007
  • 4PRIMARY DOCUMENT27 Feb 2007
  • 4PRIMARY DOCUMENT3 Jan 2007
  • 4PRIMARY DOCUMENT3 Oct 2006
  • 4PRIMARY DOCUMENT5 Jul 2006
  • 4PRIMARY DOCUMENT8 May 2006
  • 4PRIMARY DOCUMENT4 Apr 2006
  • 4PRIMARY DOCUMENT4 Jan 2006
  • 4PRIMARY DOCUMENT4 Oct 2005

HAGGERTY ROSANNE(21)

  • 4PRIMARY DOCUMENT10 May 2010
  • 4PRIMARY DOCUMENT15 May 2009
  • 4PRIMARY DOCUMENT14 Nov 2008
  • 4PRIMARY DOCUMENT19 May 2008
  • 4PRIMARY DOCUMENT3 Jan 2008
  • 4/APRIMARY DOCUMENT3 Jan 2008
  • 4PRIMARY DOCUMENT3 Oct 2007
  • 4PRIMARY DOCUMENT3 Jul 2007
  • 4PRIMARY DOCUMENT9 May 2007
  • 4PRIMARY DOCUMENT3 Apr 2007

MAIN TIMOTHY L(18)

  • 4Statement of changes in beneficial ownership23 Oct
  • 4Statement of changes in beneficial ownership27 Jul
  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership19 May 2025
  • 4Statement of changes in beneficial ownership20 May 2024
  • 4Statement of changes in beneficial ownership19 May 2023
  • 4Statement of changes in beneficial ownership20 May 2022
  • 4Statement of changes in beneficial ownership25 May 2021
  • 4Statement of changes in beneficial ownership21 May 2020
  • 4Statement of changes in beneficial ownership16 May 2019

FLAHERTY JAMES F III(18)

  • 4PRIMARY DOCUMENT8 May 2006
  • 4PRIMARY DOCUMENT4 Apr 2006
  • 4PRIMARY DOCUMENT4 Jan 2006
  • 4PRIMARY DOCUMENT4 Oct 2005
  • 4PRIMARY DOCUMENT6 Jul 2005
  • 4PRIMARY DOCUMENT18 May 2005
  • 4PRIMARY DOCUMENT11 May 2005
  • 4PRIMARY DOCUMENT5 Apr 2005
  • 4PRIMARY DOCUMENT4 Jan 2005
  • 4PRIMARY DOCUMENT4 Oct 2004

Simmons Wayne R.(18)

  • 4PRIMARY DOCUMENT20 Jun 2011
  • 4PRIMARY DOCUMENT13 May 2011
  • 4PRIMARY DOCUMENT8 Mar 2011
  • 4PRIMARY DOCUMENT17 Feb 2011
  • 4PRIMARY DOCUMENT14 Feb 2011
  • 4PRIMARY DOCUMENT11 Mar 2010
  • 4PRIMARY DOCUMENT8 Mar 2010
  • 4PRIMARY DOCUMENT16 Feb 2010
  • 4PRIMARY DOCUMENT12 Feb 2010
  • 4PRIMARY DOCUMENT6 Nov 2009

Lassiter Wright III(18)

  • 4Statement of changes in beneficial ownership23 Oct
  • 4Statement of changes in beneficial ownership27 Jul
  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership24 Apr
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership3 Oct 2025
  • 4Statement of changes in beneficial ownership25 Jul 2025
  • 4Statement of changes in beneficial ownership2 Jul 2025
  • 4Statement of changes in beneficial ownership19 May 2025
  • 4Statement of changes in beneficial ownership3 Apr 2025

BUEHLER WILLIAM F(16)

  • 4PRIMARY DOCUMENT14 Feb 2014
  • 4PRIMARY DOCUMENT23 May 2013
  • 4PRIMARY DOCUMENT14 Aug 2012
  • 4PRIMARY DOCUMENT15 May 2012
  • 4PRIMARY DOCUMENT30 Jan 2012
  • 4PRIMARY DOCUMENT19 May 2011
  • 4PRIMARY DOCUMENT10 May 2010
  • 4PRIMARY DOCUMENT5 Aug 2009
  • 4PRIMARY DOCUMENT15 May 2009
  • 4PRIMARY DOCUMENT19 May 2008

LEIDEN JEFFREY M(16)

  • 4Statement of changes in beneficial ownership30 May 2018
  • 4Statement of changes in beneficial ownership17 May 2018
  • 4Statement of changes in beneficial ownership8 Aug 2017
  • 4Statement of changes in beneficial ownership31 Jul 2017
  • 4Statement of changes in beneficial ownership18 May 2017
  • 4Statement of changes in beneficial ownership4 Aug 2016
  • 4Statement of changes in beneficial ownership19 May 2016
  • 4Statement of changes in beneficial ownership6 Jan 2016
  • 4Statement of changes in beneficial ownership5 Oct 2015
  • 4Statement of changes in beneficial ownership2 Jul 2015

MORRISON DENISE M(13)

  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership19 May 2025
  • 4Statement of changes in beneficial ownership20 May 2024
  • 4Statement of changes in beneficial ownership19 May 2023
  • 4Statement of changes in beneficial ownership20 May 2022
  • 4Statement of changes in beneficial ownership25 May 2021
  • 4Statement of changes in beneficial ownership21 May 2020
  • 4Statement of changes in beneficial ownership2 Oct 2019
  • 4Statement of changes in beneficial ownership2 Jul 2019
  • 4Statement of changes in beneficial ownership16 May 2019

CARTER ROBERT B(10)

  • 4Statement of changes in beneficial ownership23 Oct
  • 4Statement of changes in beneficial ownership27 Jul
  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership24 Apr
  • 4Statement of changes in beneficial ownership20 Feb
  • 4Statement of changes in beneficial ownership24 Oct 2025
  • 4Statement of changes in beneficial ownership25 Jul 2025
  • 4Statement of changes in beneficial ownership19 May 2025
  • 3Initial statement of beneficial ownership20 May 2024
  • 4Statement of changes in beneficial ownership20 May 2024

ORDONEZ KATHY(10)

  • 4PRIMARY DOCUMENT2 Apr 2013
  • 4PRIMARY DOCUMENT6 Mar 2013
  • 4PRIMARY DOCUMENT2 Jan 2013
  • 4PRIMARY DOCUMENT2 Oct 2012
  • 4PRIMARY DOCUMENT3 Jul 2012
  • 4PRIMARY DOCUMENT3 Apr 2012
  • 4PRIMARY DOCUMENT29 Feb 2012
  • 4PRIMARY DOCUMENT3 Jan 2012
  • 4PRIMARY DOCUMENT4 Oct 2011
  • 3PRIMARY DOCUMENT17 Aug 2011

ZEWE DAVID M(9)

  • 4PRIMARY DOCUMENT13 Feb 2007
  • 4PRIMARY DOCUMENT1 Nov 2006
  • 4PRIMARY DOCUMENT17 Feb 2006
  • 4PRIMARY DOCUMENT13 May 2005
  • 4PRIMARY DOCUMENT24 Feb 2005
  • 4PRIMARY DOCUMENT17 Aug 2004
  • 4PRIMARY DOCUMENT2 Mar 2004
  • 4PRIMARY DOCUMENT2 Mar 2004
  • 4Statement of changes in beneficial ownership30 Jul 2003

Torley Helen(8)

  • 4Statement of changes in beneficial ownership25 May 2021
  • 4Statement of changes in beneficial ownership21 May 2020
  • 4Statement of changes in beneficial ownership16 May 2019
  • 4Statement of changes in beneficial ownership3 Oct 2018
  • 4Statement of changes in beneficial ownership5 Jul 2018
  • 4Statement of changes in beneficial ownership5 Jun 2018
  • 3Initial statement of beneficial ownership17 May 2018
  • 4Statement of changes in beneficial ownership17 May 2018

QUEST DIAGNOSTICS INC(7)

  • 4Statement of changes in beneficial ownership16 May 2011
  • 4Statement of changes in beneficial ownership12 May 2011
  • 4Statement of changes in beneficial ownership10 May 2011
  • 4Statement of changes in beneficial ownership6 May 2011
  • 3Initial statement of beneficial ownership6 May 2011
  • 4PRIMARY DOCUMENT28 Aug 2007
  • 3PRIMARY DOCUMENT29 Jul 2005

GLAXOSMITHKLINE PLC(7)

  • 4Statement of changes in beneficial ownership2 Feb 2011
  • 4Statement of changes in beneficial ownership19 Mar 2009
  • 4MAIN DOCUMENT DESCRIPTION18 Sep 2008
  • 4Statement of changes in beneficial ownership20 Feb 2007
  • 4Statement of changes in beneficial ownership9 Jun 2006
  • 4PRIMARY DOCUMENT15 Dec 2004
  • 4PRIMARY DOCUMENT29 Jun 2004

CIRILLO MARY A(7)

  • 4PRIMARY DOCUMENT5 Apr 2004
  • 4PRIMARY DOCUMENT23 Feb 2004
  • 4PRIMARY DOCUMENT5 Jan 2004
  • 4PRIMARY DOCUMENT17 Nov 2003
  • 4PRIMARY DOCUMENT2 Oct 2003
  • 4MARY A. CIRILLO29 Jul 2003
  • 4Statement of changes in beneficial ownership2 Jul 2003

Doi Tracey(7)

  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership19 May 2025
  • 4Statement of changes in beneficial ownership20 May 2024
  • 4Statement of changes in beneficial ownership19 May 2023
  • 4Statement of changes in beneficial ownership20 May 2022
  • 4Statement of changes in beneficial ownership17 Aug 2021
  • 3Initial statement of beneficial ownership17 Aug 2021

WENTWORTH TIMOTHY C(6)

  • 4Statement of changes in beneficial ownership2 Oct
  • 4Statement of changes in beneficial ownership2 Jul
  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership2 Apr
  • 4Statement of changes in beneficial ownership11 Mar
  • 3Initial statement of beneficial ownership11 Mar

Peters Robert E(6)

  • 4PRIMARY DOCUMENT13 Feb 2007
  • 4PRIMARY DOCUMENT24 Feb 2006
  • 4PRIMARY DOCUMENT17 Feb 2006
  • 4PRIMARY DOCUMENT24 Feb 2005
  • 3PRIMARY DOCUMENT5 Jan 2005
  • 3/APRIMARY DOCUMENT31 Aug 2005

GARDNER MARK A(6)

  • 4Statement of changes in beneficial ownership26 Sep 2024
  • 4Statement of changes in beneficial ownership1 Mar 2024
  • 4Statement of changes in beneficial ownership16 Feb 2024
  • 4Statement of changes in beneficial ownership27 Sep 2023
  • 4Statement of changes in beneficial ownership27 Feb 2023
  • 3Initial statement of beneficial ownership22 Nov 2022

BRODY KENNETH D(5)

  • 4PRIMARY DOCUMENT28 Apr 2004
  • 4PRIMARY DOCUMENT11 Feb 2004
  • 4PRIMARY DOCUMENT9 Feb 2004
  • 4PRIMARY DOCUMENT5 Feb 2004
  • 4PRIMARY DOCUMENT2 Feb 2004

MARRONE GERALD C(5)

  • 4PRIMARY DOCUMENT2 Mar 2004
  • 4PRIMARY DOCUMENT25 Feb 2004
  • 4PRIMARY DOCUMENT2 Mar 2004
  • 4Statement of changes in beneficial ownership20 Aug 2003
  • 4Statement of changes in beneficial ownership22 Jul 2003

Mendez Manuel O.(5)

  • 4Statement of changes in beneficial ownership22 Feb 2021
  • 4Statement of changes in beneficial ownership7 Oct 2020
  • 4Statement of changes in beneficial ownership26 Feb 2020
  • 4Statement of changes in beneficial ownership20 Feb 2020
  • 3Initial statement of beneficial ownership21 Nov 2019

Spark Acquisition Corp(5)

  • 4Statement of changes in beneficial ownership16 May 2011
  • 4Statement of changes in beneficial ownership12 May 2011
  • 4Statement of changes in beneficial ownership10 May 2011
  • 4Statement of changes in beneficial ownership6 May 2011
  • 3Initial statement of beneficial ownership6 May 2011

Diaz Luis(5)

  • 4Statement of changes in beneficial ownership21 May
  • 4Statement of changes in beneficial ownership19 May 2025
  • 4Statement of changes in beneficial ownership20 May 2024
  • 3Initial statement of beneficial ownership19 May 2023
  • 4Statement of changes in beneficial ownership19 May 2023

GRANT THOMAS W II(4)

  • 4PRIMARY DOCUMENT13 Feb 2007
  • 5PRIMARY DOCUMENT7 Feb 2007
  • 4PRIMARY DOCUMENT17 Feb 2006
  • 3PRIMARY DOCUMENT6 Jan 2006

Haydon John B.(4)

  • 4PRIMARY DOCUMENT18 Feb 2014
  • 4PRIMARY DOCUMENT17 Dec 2013
  • 4PRIMARY DOCUMENT27 Feb 2013
  • 3PRIMARY DOCUMENT4 Jan 2013

≥5% Ownership

BlackRock Inc.(18)

  • SC 13G/AQuest Diagnostics Inc24 Jan 2024
  • SC 13G/AQuest Diagnostics Inc23 Jan 2023
  • SC 13G/AQuest Diagnostics Inc8 Apr 2022
  • SC 13G/AQuest Diagnostics Inc7 Feb 2022
  • SC 13G/AQuest Diagnostics Inc1 Feb 2021
  • SC 13G/AQuest Diagnostics Inc6 Feb 2020
  • SC 13G/AQuest Diagnostics Inc10 Apr 2019
  • SC 13G/AQuest Diagnostics Inc6 Feb 2019
  • SC 13G/AQuest Diagnostics Inc8 Feb 2018
  • SC 13G/AQuest Diagnostics Inc17 Jan 2017

VANGUARD GROUP INC(14)

  • SC 13G/AQuest Diagnostics Inc27 Mar
  • SC 13G/AQuest Diagnostics Inc13 Feb 2024
  • SC 13G/AQuest Diagnostics Inc9 Feb 2023
  • SC 13G/AQuest Diagnostics Inc10 Feb 2022
  • SC 13G/AQuest Diagnostics Inc10 Feb 2021
  • SC 13G/AQuest Diagnostics Inc12 Feb 2020
  • SC 13G/AQuest Diagnostics Inc12 Feb 2019
  • SC 13G/AQuest Diagnostics Inc12 Feb 2018
  • SC 13G/AQuest Diagnostics Inc10 Mar 2017
  • SC 13G/AQuest Diagnostics Inc13 Feb 2017

QUEST DIAGNOSTICS INC(11)

  • SC 13DCelera CORP18 May 2011
  • SC 13D/ACiphergen Biosystems Inc19 Jan 2006
  • SC 13DCiphergen Biosystems Inc1 Aug 2005
  • SC 13GVasogen Inc9 Jul 2003
  • SC 13D/AUnilab Corp /De/24 Jun 2002
  • SC 13DUnilab Corp /De/12 Apr 2002
  • SC 13D/AMedplus Inc /Oh/1 Nov 2001
  • SC 13D/AMedplus Inc /Oh/30 Apr 2001
  • SC 13D/AMedplus Inc /Oh/2 Apr 2001
  • SC 13D/AMedplus Corp1 Aug 2000

PRICE T ROWE ASSOCIATES INC /MD/(9)

  • SC 13G/AQuest Diagnostics Inc14 Aug
  • SC 13G/AQuest Diagnostics Inc14 Aug 2025
  • SC 13GQuest Diagnostics Inc14 May 2025
  • SC 13G/AQuest Diagnostics Inc9 Feb 2016
  • SC 13G/AQuest Diagnostics Inc12 Feb 2015
  • SC 13G/AQuest Diagnostics Inc12 Feb 2014
  • SC 13G/AQuest Diagnostics Inc11 Feb 2014
  • SC 13G/AQuest Diagnostics Inc6 Feb 2013
  • SC 13GQuest Diagnostics Inc10 Feb 2012

GLAXOSMITHKLINE PLC(9)

  • SC 13D/AQuest Diagnostics Inc1 Feb 2011
  • SC 13D/AQuest Diagnostics Inc20 Mar 2009
  • SC 13D/AQuest Diagnostics Inc18 Sep 2008
  • SC 13D/AQuest Diagnostics Inc16 Feb 2007
  • SC 13D/AQuest Diagnostics Inc14 Jun 2006
  • SC 13D/AQuest Diagnostics Inc15 Dec 2004
  • SC 13D/AQuest Diagnostics Inc29 Jun 2004
  • SC 13D/AQuest Diagnostics Inc22 May 2002
  • SC 13D/AQuest Diagnostics Inc14 May 2001

FMR LLC(7)

  • SC 13G/AQuest Diagnostics Inc13 Feb 2015
  • SC 13GQuest Diagnostics Inc14 Feb 2014
  • SC 13G/AQuest Diagnostics Inc11 Sep 2000
  • SC 13G/AQuest Diagnostics Inc11 Feb 2000
  • SC 13G/AQuest Diagnostics Inc7 Jan 1999
  • SC 13G/AQuest Diagnostics Inc11 Feb 1998
  • SC 13GQuest Diagnostics Inc8 May 1997

WELLINGTON MANAGEMENT CO LLP(6)

  • SC 13G/AQuest Diagnostics Inc13 Feb 2001
  • SC 13G/AQuest Diagnostics Inc9 Jun 2000
  • SC 13G/AQuest Diagnostics Inc11 Feb 2000
  • SC 13G/AQuest Diagnostics Inc9 Mar 1999
  • SC 13G/AQuest Diagnostics Inc10 Feb 1999
  • SC 13GQuest Diagnostics Inc10 Feb 1998

MACQUARIE GROUP LTD(6)

  • SC 13G/AQuest Diagnostics Inc13 Feb 2020
  • SC 13GQuest Diagnostics Inc14 Feb 2019
  • SC 13G/AQuest Diagnostics Inc13 Feb 2018
  • SC 13G/AQuest Diagnostics Inc14 Feb 2017
  • SC 13G/AQuest Diagnostics Inc16 Feb 2016
  • SC 13GQuest Diagnostics Inc13 Feb 2015

MELLON FINANCIAL CORP(5)

  • SC 13G/AQuest Diagnostics Inc18 Jan 2001
  • SC 13G/AQuest Diagnostics Inc27 Jan 2000
  • SC 13G/AQuest Diagnostics Inc6 Aug 1999
  • SC 13G/AQuest Diagnostics Inc5 Feb 1999
  • SC 13GQuest Diagnostics Inc23 Jan 1998

BARROW HANLEY MEWHINNEY & STRAUSS LLC(4)

  • SC 13GQuest Diagnostics Inc9 Feb 2012
  • SC 13GQuest Diagnostics Inc11 Feb 2011
  • SC 13G/AQuest Diagnostics Inc9 Feb 2010
  • SC 13GQuest Diagnostics Inc8 Feb 2010

BANK OF AMERICA CORP /DE/(3)

  • SC 13G/AQuest Diagnostics Inc13 Feb 2004
  • SC 13G/AQuest Diagnostics Inc14 Feb 2003
  • SC 13GQuest Diagnostics Inc11 Dec 2002

STATE STREET CORP(3)

  • SC 13G/AQuest Diagnostics Inc25 Jan 2024
  • SC 13G/AQuest Diagnostics Inc7 Feb 2023
  • SC 13GQuest Diagnostics Inc10 Feb 2022

VANGUARD WINDSOR FUNDS(3)

  • SC 13G/AQuest Diagnostics Inc26 Jan 2012
  • SC 13G/AQuest Diagnostics Inc10 Feb 2011
  • SC 13GQuest Diagnostics Inc4 Feb 2010

VANGUARD SPECIALIZED PORTFOLIOS INC(3)

  • SC 13G/AQuest Diagnostics Inc9 Feb 2001
  • SC 13G/AQuest Diagnostics Inc4 Feb 2000
  • SC 13GQuest Diagnostics Inc11 Feb 1999

ABERDEEN ASSET MANAGEMENT PLC/UK(3)

  • SC 13G/AQuest Diagnostics Inc24 Jan 2014
  • SC 13G/AQuest Diagnostics Inc25 Jan 2013
  • SC 13GQuest Diagnostics Inc11 Jan 2012

Capital World Investors(3)

  • SC 13G/AQuest Diagnostics Inc13 Feb 2014
  • SC 13G/AQuest Diagnostics Inc13 Feb 2013
  • SC 13GQuest Diagnostics Inc10 Feb 2012

GOLDMAN SACHS GROUP LP(2)

  • SC 13G/AQuest Diagnostics Inc16 Feb 1999
  • SC 13GQuest Diagnostics Inc13 Feb 1998

PZENA INVESTMENT MANAGEMENT LLC /ADV(2)

  • SC 13G/AQuest Diagnostics Inc16 Jul 1999
  • SC 13GQuest Diagnostics Inc19 Jan 1999

SMITHKLINE BEECHAM PLC(1)

  • SC 13DQuest Diagnostics Inc25 Aug 1999

BlackRock, Inc.(1)

  • SC 13G/AQuest Diagnostics Inc17 Apr 2025

VANGUARD CAPITAL MANAGEMENT LLC(1)

  • SC 13GQuest Diagnostics Inc30 Apr

VANGUARD PORTFOLIO MANAGEMENT LLC(1)

  • SC 13GQuest Diagnostics Inc29 Apr