Quest Diagnostics Inc

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Quest Diagnostics Inc
TickerDGX
CIK #0001022079
CUSIP74834L100
SectorLife Sciences - Services-Medical Laboratories
Address3 Giralda Farms, Madison, NJ 07940
Source [EDGAR]
CIK Filing 2011 - 2026
[0001022079] 10-K
[0001022079] 10-Q
[0001022079] 3
[0001022079] 4
[0001022079] 5
[0001022079] 8-K
[0001022079] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Vanguard Capital Management LLC Quest Diagnostics Inc [2026-04-30] 0.0
Vanguard Portfolio Management LLC Quest Diagnostics Inc [2026-04-29] 0.0
Price T Rowe Associates Inc /MD/ Quest Diagnostics Inc [2025-05-14] 0.0
State Street Corp Quest Diagnostics Inc [2022-02-10] 5.11
Macquarie Group Ltd Quest Diagnostics Inc [2019-02-14] 5.68
Macquarie Group Ltd Quest Diagnostics Inc [2015-02-13] 5.82
FMR LLC Quest Diagnostics Inc [2014-02-14] 0.0
Vanguard Group Inc Quest Diagnostics Inc [2013-02-13] 5.82
Price T Rowe Associates Inc /MD/ Quest Diagnostics Inc [2012-02-10] 5.4
Capital World Investors Quest Diagnostics Inc [2012-02-10] 5.6
Barrow Hanley Mewhinney & Strauss LLC Quest Diagnostics Inc [2012-02-09] 12.0
BlackRock Inc Quest Diagnostics Inc [2012-02-09] 5.22
Aberdeen Asset Management PLC/UK Quest Diagnostics Inc [2012-01-11] 5.91
Form 3/4/5 Filer 2011 - 2026
Quest Diagnostics Inc
Wentworth Timothy C
Kuppusamy Karthik
Davis J E
Morrison Denise M
Ring Timothy M
Lassiter Wright III
Doi Tracey
Pfeiffer Gary M
Gregg Vicky B
Diaz Luis
Main Timothy L
Carter Robert B
Plewman Patrick
Samad Sam
Delaney Mark E
Deppe Michael J
Prevoznik Michael E
Doherty Catherine T
Gardner Mark A
Wilensky Gail R
Rusckowski Stephen H
Guinan Mark
Eglinton Manner Carrie
Torley Helen
Mendez Manuel O
Stanzione Daniel
Cunningham Everett
Klug Robert A
Britell Jenne K
Leiden Jeffrey M
Cohen Jon R
Ziegler John B
Baldwin John C MD
Bongiorno Thomas F
Haydon John B
Buehler William F
Ordonez Kathy
Hagemann Robert
Mohapatra Surya N
Miller Joan Elizabeth
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Wentworth Timothy C
Common Stock
2026-03-09 Grant 215 $0.00
Prevoznik Michael E
Common Stock
2026-03-05 Sell 3,878 $206.21 799,682
Plewman Patrick
Common Stock
2026-03-05 Sell 2,855 $206.21 588,730
Doherty Catherine T
Common Stock
2026-03-05 Sell 5,558 $206.21 1,146,115
Davis J E
Common Stock
2026-03-04 Tax withheld 26,414 $204.86 5,411,172
Prevoznik Michael E
Common Stock
2026-03-04 Tax withheld 3,354 $204.86 687,100
Samad Sam
Common Stock
2026-03-04 Tax withheld 7,720 $204.86 1,581,519
Deppe Michael J
Common Stock
2026-03-04 Grant 1,473 $204.86 301,759
Delaney Mark E
Common Stock
2026-03-04 Tax withheld 2,326 $204.86 476,504
Doherty Catherine T
Common Stock
2026-03-04 Grant 11,364 $204.86 2,328,029
Delaney Mark E
Common Stock
2026-03-04 Grant 5,682 $204.86 1,164,015
Prevoznik Michael E
Common Stock
2026-03-04 Grant 7,232 $204.86 1,481,548
Kuppusamy Karthik
Common Stock
2026-03-04 Sell 2,628 $204.86 538,372
Kuppusamy Karthik
Common Stock
2026-03-04 Grant 6,200 $204.86 1,270,132
Deppe Michael J
Common Stock
2026-03-04 Tax withheld 750 $204.86 153,645
Plewman Patrick
Common Stock
2026-03-04 Grant 5,682 $204.86 1,164,015
Davis J E
Common Stock
2026-03-04 Grant 51,652 $204.86 10,581,429
Samad Sam
Common Stock
2026-03-04 Grant 13,947 $204.86 2,857,182
Plewman Patrick
Common Stock
2026-03-04 Tax withheld 2,827 $204.86 579,139
Doherty Catherine T
Common Stock
2026-03-04 Tax withheld 5,806 $204.86 1,189,417
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 1,066 94,143,510
2025-12-31 1,052 98,265,822
2025-09-30 1,009 100,774,080
2025-06-30 990 99,867,946
2025-03-31 968 96,892,893
2024-12-31 898 92,787,966
2024-09-30 851 93,886,495
2024-06-30 839 97,392,185
2024-03-31 818 103,163,132
2023-12-31 834 96,605,501
2023-09-30 800 92,699,946
2023-06-30 824 93,619,775
Form 13F Holdings
Firm Period DFND Voting Shares
Eastern Bank [2026-06-30] SOLE 171,286 182,858
Aegon Asset Management UK PLC [2026-06-30] SOLE 107,888 107,888
Swedbank AB [2026-06-30] DFND 97,588 97,588
JGP Wealth Management LLC [2026-06-30] SOLE 64,421 66,982
E Six Thirteen LLC [2026-06-30] SOLE 59,465 59,465
Simplify Asset Management Inc [2026-06-30] SOLE 49,715 49,715
OFI Invest Asset Management [2026-06-30] SOLE 7,823,217 41,285
GHP Investment Advisors Inc [2026-06-30] SOLE 38,039 38,517
Sequoia Financial Advisors LLC [2026-06-30] SOLE 0 33,797
Toth Financial Advisory Corp [2026-06-30] SOLE 7,797 32,530
Czech National Bank [2026-06-30] SOLE 31,508 31,508
Reliant Investment Management LLC [2026-06-30] SOLE 25,810 25,810
QRG Capital Management Inc [2026-06-30] SOLE 25,798 25,798
Canada Post Corp Registered Pension Plan [2026-06-30] SOLE 24,858 24,858
Commonwealth of Pennsylvania Public School Empls Retrmt SYS [2026-06-30] SOLE 24,450 24,450
MassMutual Private Wealth & Trust FSB [2026-06-30] SOLE 20,135 20,135
Bar Harbor Wealth Management [2026-06-30] DFND 18,575 18,585
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 395 16,842
Wasatch Advisors LP [2026-06-30] SOLE 16,775 16,775
Old National Bancorp /IN/ [2026-06-30] SOLE 16,057 16,057
Assenagon Asset Management SA [2026-06-30] SOLE 15,405 15,405
G&S Capital LLC [2026-06-30] SOLE 0 15,108
Yousif Capital Management LLC [2026-06-30] SOLE 5,284 15,051
Stablepoint Partners LLC [2026-06-30] SOLE 0 14,652
Marion Wealth Management [2026-06-30] SOLE 0 14,390
PensionDanmark Pensionsforsikringsaktieselskab [2026-06-30] SOLE 0 14,000
Linden Thomas Advisory Services LLC [2026-06-30] SOLE 0 12,539
IFP Advisors LLC [2026-06-30] SOLE 12,005 12,005
SVB Wealth LLC [2026-06-30] SOLE 10,399 11,482
Kavar Capital Partners Group LLC [2026-06-30] SOLE 0 11,415
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