Companies / Quest Diagnostics Inc

Quest Diagnostics Inc

NYSE: DGXCIK 1022079Health CareSECAUCUS, NJquestdiagnostics.com ↗
Steve Rusckowski
Chief Executive Officer
Steve Rusckowski
Photo: World Economic Forum · CC BY 3.0 · Wikimedia Commons
Insider flow · last 90 daysNet sells $3.57M

Financials · FY2025

Revenue$11.04B
Net income$1.05B
Total debt$6.45B
Cash$626.00M
Diluted EPS$8.75
Shares outstanding110.4M

Ownership

110.4M shares outstanding · as of Jul 15, 2026
0.45%Insiders
Ownership
Insiders0.45%494,631
10%+ / strategic13.02%14,371,196
Institutions96.20%106,182,215
Public float0.00%0

Reported holdings exceed shares outstanding — public float shown as 0; some positions may overlap or lag.

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 18

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Insider% of sharesShares
Davis J. E.CEOCEO and President · Director
0.12%132,423
Doherty Catherine T.EVP, Regional Businesses
0.06%67,122
Prevoznik Michael ESVP & General Counsel
0.03%37,557
Deppe Michael JSVP, Corp. Controller & CAO
0.03%35,196
Samad SamExecutive Vice President & CFO
0.03%33,376
Ring Timothy MDirector
0.03%31,140
Pfeiffer Gary MDirector
0.03%31,005
Main Timothy LDirector
0.02%27,439
Gregg Vicky BDirector
0.02%18,314
Plewman PatrickSVP for Diagnostic Services
0.01%15,247

Institutional holders 1,056

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HolderValue% of shares
Vanguard Group Inc$2.50B13.04%
BlackRock, Inc.$1.97B8.40%
State Street Corporation$1.17B5.00%
Boston Partners$786.65M3.64%
JPMorgan Chase & Co$719.44M3.76%
Geode Capital Management, LLC$602.66M2.80%
Morgan Stanley$467.42M2.44%
Grantham, Mayo, Van Otterloo & Co. LLC$369.04M1.71%
Dimensional Fund Advisors LP$335.20M1.75%
Victory Capital Management, Inc.$328.64M1.40%

Activity

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InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Mar 4, 2026Davis J. E.
CEO
GrantCommon Stock$10.58M+52K
+44.08%
168,837
0.15% of shares
low
Mar 4, 2026Davis J. E.
CEO
OtherCommon Stock$5.41M-26K
-15.64%
142,423
0.13% of shares
low
Feb 13, 2026Doherty Catherine T.
Executive
ExerciseCommon Stock$2.93M+26K
+38.44%
94,233
0.09% of shares
low
Mar 4, 2026Samad Sam
Executive
GrantCommon Stock$2.86M+14K
+51.58%
40,988
0.04% of shares
low
Mar 4, 2026Doherty Catherine T.
Executive
GrantCommon Stock$2.33M+11K
+16.93%
78,486
0.07% of shares
low
Feb 13, 2026Doherty Catherine T.
Executive
SellCommon Stock$2.17M-11K
-11.22%
83,660
0.08% of shares
medium
Mar 2, 2026Davis J. E.
CEO
SellCommon Stock$2.13M-10K
-7.86%
117,185
0.11% of shares
medium
Feb 13, 2026Doherty Catherine T.
Executive
SellCommon Stock$2.09M-10K
-12.10%
73,538
0.07% of shares
medium

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Vanguard Group IncPassive13G/A—0—
Vanguard Portfolio ManagementPassive13G—6,096,629—
Vanguard Capital ManagementPassive13G—8,274,567—

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
DGX——74834L100—