Quest Diagnostics Incorporated
Last updated September 27, 2026
Organization details
- Legal name
- Quest Diagnostics Incorporated
- Former names
- Corning Clinical Laboratories Inc
- Ownership
- Public
- Status
- Active
- 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
Board of directors
-
Denise M. Morrison · DirectorSince 2023
-
Gail R. Wilensky · DirectorSince 2023
-
Gary M. Pfeiffer · DirectorSince 2023
-
J. E. Davis · Director · CEO and PresidentSince 2023
-
Luis Diaz · DirectorSince 2023
-
Robert B. Carter · DirectorSince 2024
-
Stephen H. Rusckowski · DirectorSince 2023
-
Timothy C. Wentworth · DirectorSince 2026
-
Timothy L. Main · DirectorSince 2023
-
Timothy M. Ring · DirectorSince 2023
-
Tracey Doi · DirectorSince 2023
-
Vicky B. Gregg · DirectorSince 2023
-
Wright Lassiter III · DirectorSince 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.
-
87.2%
-
89.1%
-
91.8%
-
94.0%
-
94.4%
-
95.6%
-
99.4%
-
99.6%
-
99.8%
-
99.8%
-
99.9%
Board connections
6 of this board's directors also sit on 9 other boards.
- via Vicky B. Gregg
- via Stephen H. Rusckowski
- via Timothy M. Ring
- via Wright Lassiter III
- via Denise M. Morrison
- via Stephen H. Rusckowski
- via Tracey Doi
- via Stephen H. Rusckowski
- 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
- $37,265,783
- 30 sales by 8 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 1, 2026 | J. E. Davis Director, Officer (CEO and President) | Open-market sale | −10,000 | $242.72 | $2,427,200 |
| Aug 28, 2026 | PREVOZNIK MICHAEL E Officer (SVP & General Counsel) | Option exercise | +22,677 | $112.17 | $2,543,679 |
| Aug 28, 2026 | PREVOZNIK MICHAEL E Officer (SVP & General Counsel) | Open-market sale | −16,010 | $242.88 | $3,888,437 |
| Aug 28, 2026 | PREVOZNIK MICHAEL E Officer (SVP & General Counsel) | Open-market sale | −6,237 | $243.63 | $1,519,505 |
| Aug 28, 2026 | PREVOZNIK MICHAEL E Officer (SVP & General Counsel) | Open-market sale | −430 | $244.51 | $105,141 |
| Aug 28, 2026 | PREVOZNIK MICHAEL E Officer (SVP & General Counsel) | Gift | −1,000 | — | — |
| Jul 28, 2026 | DELANEY MARK E Officer (SVP & Chief Commercial Officer) | Open-market sale | −1,600 | $235.18 | $376,288 |
| Jul 22, 2026 | Robert B. Carter Director | Small acquisition | +11 | $206.80 | $2,275 |
| Jul 22, 2026 | DELANEY MARK E Officer (SVP & Chief Commercial Officer) | Small acquisition | +34 | $206.81 | $7,031 |
| Jul 22, 2026 | Vicky B. Gregg Director | Grant or award | +72 | $206.81 | $14,890 |
| Jul 22, 2026 | KUPPUSAMY KARTHIK Officer (SVP, Clinical Solutions) | Small acquisition | +37 | $206.81 | $7,652 |
| Jul 22, 2026 | Wright Lassiter III Director | Small acquisition | +6 | $206.81 | $1,241 |
| Jul 22, 2026 | Timothy L. Main Director | Small acquisition | +21 | $206.81 | $4,343 |
| Jul 22, 2026 | Plewman Patrick Officer (SVP for Diagnostic Services) | Small acquisition | +46 | $206.81 | $9,513 |
| Jul 22, 2026 | Sam Samad Officer (Executive Vice President & CFO) | Grant or award | +102 | $206.81 | $21,094 |
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