internal
James E. Davis
Chairman, Chief Executive Officer and President
Executive
3 yr
4 reports
Quest Diagnostics ·DGX
CEO directly oversees all major businesses—no standalone COO
Health Care · Fortune #419 · Functional structure · 50K employees · Secaucus, New Jersey
4
CEO span
↓ tighter than peers (avg 8)
4
Avg span
moderate
2
Max depth
2 levels
6 yr
Avg tenure
25%
Internal hires
↓ below industry avg
Consolidated financials FY2025 · period end 2025-12-31 · 10-K
Revenue
$11.0B
Operating income
$1.6B
Net income
$992M
Total assets
$16.2B
Shares out
110M
Sourced from Quest Diagnostics DEF 14A · filed 2026-04-06 ↗ View on SEC
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Quest Diagnostics organizational chart
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Quest Diagnostics operates with a notably centralized structure in which the CEO directly oversees all major enterprise functions without a COO. This page details the executive org chart, leadership tenure, compensation context, and peer comparison to highlight how Quest’s lean top structure differs from healthcare services peers.
What to model
Use the chart to test org decisions, not just view reporting lines
Start with the public baseline, then use the scenario views and source-backed changes to ask what happens when leadership, span, or team ownership shifts.
Latest signal Timothy Wentworth joined as Director
Elected to the Board on March 9, 2026.
Source · See change logScenario views in the chart
- Add Chief Operating Officer Introduce a COO reporting to the CEO to reduce span and centralize operational execution.
- Consolidate Regional and Clinical Ops Move Clinical Solutions under Regional Businesses to streamline operational accountability.
Atlas work this supports
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The people
Who's running this
5 executives identified as Named Executive Officers in the most recent SEC proxy. Bar length scales with tenure.
Sam A. Samad
Executive Vice President and Chief Financial Officer
Finance
7 yr
0 reports
Catherine T. Doherty
Executive Vice President, Regional Businesses
Operations
6 yr
0 reports
Michael E. Prevoznik
Senior Vice President and General Counsel
Legal
9 yr
0 reports
Karthik Kuppusamy
Senior Vice President, Clinical Solutions
Clinical & Diagnostics
5 yr
0 reports
The pay
Executive compensation
From the most recent DEF 14A Summary Compensation Table. 1 named executive officers disclosed. Bar length scales with total compensation.
James E. Davis $15.5M
- Base salary
- $1.25M
- Stock awards
- $8.76M
- Option awards
- $3.00M
- Non-equity incentive
- $2.21M
- Other
- $280K
- Fiscal year
- FY2025
- Source
- SEC DEF 14A ↗
The businesses
How Quest Diagnostics divides the work
4 divisions report into the group CEO. Tile size scales with estimated headcount.
Finance
2K employees
EVP & CFO (Sam A. Samad)
Manages financial reporting, capital allocation, investor relations, and enterprise controls.
Regional Businesses
40K employees
EVP, Regional Businesses (Catherine T. Doherty)
Oversees Quest’s diagnostic operations across U.S. regions and health system partnerships.
Clinical Solutions
3K employees
SVP, Clinical Solutions (Karthik Kuppusamy)
Leads advanced diagnostics, clinical innovation, and test development.
Legal & Compliance
500 employees
SVP & General Counsel (Michael E. Prevoznik)
Manages legal affairs, compliance, governance, and regulatory risk.
The thesis
Why this org is unusual
Quest Diagnostics stands out for lacking a standalone COO, with the CEO directly overseeing finance, regional operations, legal, and clinical solutions.
This creates a highly centralized executive span where all major enterprise levers report straight to James E. Davis. The structure reflects Quest’s emphasis on tight integration between diagnostics operations and enterprise strategy rather than semi-autonomous business units. Compared with peers, this concentrates accountability at the top and limits intermediate executive layers.
- No standalone COO
- All business leaders report directly to CEO
The comparison
How Quest Diagnostics stacks up
Compared with Labcorp and other healthcare services peers, Quest maintains a leaner C-suite without a COO role. Many peers insert an operating executive between the CEO and business heads, increasing depth but reducing CEO span. Quest’s model favors direct oversight and faster decision-making, but it also places …
C-suite size
Quest Diagnostics
5
Laboratory Corp. of America
8
Agilent Technologies
9
Thermo Fisher Scientific
9
Reporting depth
Quest Diagnostics
2 levels
Laboratory Corp. of America
4 levels
Agilent Technologies
5 levels
5 levels
Thermo Fisher Scientific
5 levels
Avg C-suite tenure
Quest Diagnostics
6 yr
Laboratory Corp. of America
6 yr
Agilent Technologies
5 yr
7 yr
Thermo Fisher Scientific
8 yr
Has COO / Has CAIO
Quest Diagnostics — no COO — no CAIO
Laboratory Corp. of America ✓ COO — no CAIO
Agilent Technologies ✓ COO — no CAIO
Thermo Fisher Scientific ✓ COO — no CAIO
Current signals
What changed recently
The most notable recent change was the March 2026 election of former Walgreens CEO Timothy Wentworth to Quest’s board.
- new
Leadership Timeline
Year-over-year executive structure based on SEC proxy and annual filings.
FY2025
DEF 14A filed 2026-04-06
- CEO
- James E. Davis
- CEO span
- 4
- C-suite
- 5
- Avg tenure
- 6 yr
Centralized executive structure without a COO remained intact.
Named executive officers (5)
- James E. Davis - CEO since 2022
- Sam A. Samad - CFO
- Catherine T. Doherty - EVP, Regional Businesses
- Michael E. Prevoznik - SVP & General Counsel
- Karthik Kuppusamy - SVP, Clinical Solutions
The board
Board of directors
2 directors. 1 of 2 independent (50%). Source: most recent DEF 14A.
James E. Davis
Chair Inside
Chairman, CEO and President, Quest Diagnostics
Timothy M. Ring
Lead Indep. Independent
Retired Chairman and CEO, C. R. Bard, Inc.
Also on: Becton, Dickinson and Company
The board, organized
Board committees
1 standing committees. Audit and Compensation must be 100% independent under SEC rules; the rest vary.
Audit and Finance Committee
100% independent
- Timothy M. Ring Chair
Frequently Asked Questions
Who is the CEO of Quest Diagnostics?
James E. Davis has served as Chairman, CEO, and President since November 1, 2022.
What type of organizational structure does Quest Diagnostics use?
Quest Diagnostics operates a functional structure with centralized oversight by the CEO.
How many direct reports does Quest Diagnostics's CEO have?
The CEO has four direct reports, covering finance, regional operations, legal, and clinical solutions.
How has Quest Diagnostics's leadership changed recently?
In March 2026, Quest elected Timothy Wentworth as a new independent director.
Does Quest Diagnostics have a COO?
No. Quest Diagnostics does not have a standalone Chief Operating Officer role.
Sources
- 8-K Filing, Mar 2026
- SEC EDGAR: Quest Diagnostics DEF 14A Proxy Statement
- SEC EDGAR: Quest Diagnostics 10-K Annual Report
Reference
Cite this page
If you reference this page in research, analysis, or news writing, use one of the formats below. Citation includes the SEC filing source where applicable.
APA 7th
Creately. (2026). Quest Diagnostics organizational structure. Creately. Retrieved , from https://creately.com/org-chart/fortune-500/quest-diagnostics/MLA 9th
"Quest Diagnostics Organizational Structure." Creately, April 1, 2026, https://creately.com/org-chart/fortune-500/quest-diagnostics/. Accessed .Chicago 17
Creately. "Quest Diagnostics Organizational Structure." Last modified April 1, 2026. https://creately.com/org-chart/fortune-500/quest-diagnostics/.Original SEC source View on SEC ↗
Quest Diagnostics. DEF 14A. Filed 2026-04-06. U.S. Securities and Exchange Commission. https://www.sec.gov/Archives/edgar/data/1022079/000114036126013356/ny20064122x1_def14a.htmPermanent URL: https://creately.com/org-chart/fortune-500/quest-diagnostics/ · last updated 2026-04-01