There have been 50 recent insider transactions recorded for Quest Diagnostics Incorporated (DGX), including 11 buys and 33 sells. Total insider buying was valued at $27.15M and total insider selling at $28.42M.
Notable insiders with recent activity include Wentworth Timothy C, Prevoznik Michael E, Plewman Patrick. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — DGX
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-04-01 |
Wentworth Timothy C |
Director |
RSU Award |
198 |
- |
- |
198 |
| 2026-03-09 |
Wentworth Timothy C |
Director |
Unknown |
- |
- |
- |
- |
| 2026-03-09 |
Wentworth Timothy C |
Director |
RSU Award |
215 |
- |
- |
215 |
| 2026-03-05 |
Prevoznik Michael E |
SVP & General Counsel |
Informative Sell |
3,878 |
$206.21 |
$799.68K |
37,557 |
| 2026-03-05 |
Plewman Patrick |
SVP For Diagnostic Services |
Informative Sell |
2,855 |
$206.21 |
$588.73K |
15,198 |
| 2026-03-05 |
Doherty Catherine T. |
EVP, Regional Businesses |
Informative Sell |
5,558 |
$206.21 |
$1.15M |
67,122 |
| 2026-03-04 |
Prevoznik Michael E |
SVP & General Counsel |
Tax Withholding of RSU |
3,354 |
$204.86 |
$687.1K |
41,435 |
| 2026-03-04 |
Plewman Patrick |
SVP For Diagnostic Services |
Tax Withholding of RSU |
2,827 |
$204.86 |
$579.14K |
18,053 |
| 2026-03-04 |
Doherty Catherine T. |
EVP, Regional Businesses |
Tax Withholding of RSU |
5,806 |
$204.86 |
$1.19M |
72,680 |
| 2026-03-04 |
Davis J. E. |
CEO and President |
Tax Withholding of RSU |
26,414 |
$204.86 |
$5.41M |
142,423 |
| 2026-03-04 |
Samad Sam |
Executive Vice President & CFO |
Tax Withholding of RSU |
7,720 |
$204.86 |
$1.58M |
33,268 |
| 2026-03-04 |
Deppe Michael J |
SVP, Corp. Controller & CAO |
Tax Withholding of RSU |
750 |
$204.86 |
$153.65K |
35,196 |
| 2026-03-04 |
Kuppusamy Karthik |
SVP, Clinical Solutions |
Informative Sell |
2,628 |
$204.86 |
$538.37K |
13,441 |
| 2026-03-04 |
Delaney Mark E |
SVP & Chief Commercial Officer |
Tax Withholding of RSU |
2,326 |
$204.86 |
$476.5K |
11,864 |
| 2026-03-03 |
Prevoznik Michael E |
SVP & General Counsel |
Informative Sell |
526 |
$207.73 |
$109.27K |
37,557 |
| 2026-03-03 |
Plewman Patrick |
SVP For Diagnostic Services |
Informative Sell |
410 |
$207.73 |
$85.17K |
15,198 |
| 2026-03-03 |
Doherty Catherine T. |
EVP, Regional Businesses |
Informative Sell |
632 |
$207.73 |
$131.29K |
67,122 |
| 2026-03-02 |
Prevoznik Michael E |
SVP & General Counsel |
Tax Withholding of RSU |
288 |
$204.86 |
$59K |
38,083 |
| 2026-03-02 |
Plewman Patrick |
SVP For Diagnostic Services |
Tax Withholding of RSU |
230 |
$204.86 |
$47.12K |
15,608 |
| 2026-03-02 |
Doherty Catherine T. |
EVP, Regional Businesses |
Tax Withholding of RSU |
648 |
$204.86 |
$132.75K |
67,754 |
| 2026-03-02 |
Davis J. E. |
CEO and President |
Informative Sell |
10,000 |
$212.52 |
$2.13M |
117,185 |
| 2026-03-02 |
Samad Sam |
Executive Vice President & CFO |
Tax Withholding of RSU |
869 |
$204.86 |
$178.02K |
27,041 |
| 2026-03-02 |
Deppe Michael J |
SVP, Corp. Controller & CAO |
Tax Withholding of RSU |
88 |
$204.86 |
$18.03K |
34,473 |
| 2026-03-02 |
Kuppusamy Karthik |
SVP, Clinical Solutions |
Tax Withholding of RSU |
205 |
$204.86 |
$42K |
9,869 |
| 2026-03-02 |
Delaney Mark E |
SVP & Chief Commercial Officer |
Tax Withholding of RSU |
188 |
$204.86 |
$38.51K |
8,508 |
| 2026-02-19 |
Prevoznik Michael E |
SVP & General Counsel |
Informative Sell |
1,111 |
$204.83 |
$227.57K |
38,371 |
| 2026-02-19 |
Plewman Patrick |
SVP For Diagnostic Services |
Informative Sell |
958 |
$204.83 |
$196.23K |
15,838 |
| 2026-02-19 |
Doherty Catherine T. |
EVP, Regional Businesses |
Informative Sell |
1,433 |
$204.83 |
$293.52K |
68,402 |
| 2026-02-18 |
Prevoznik Michael E |
SVP & General Counsel |
RSU Award |
9,289 |
$204.96 |
$1.9M |
9,289 |
| 2026-02-18 |
Plewman Patrick |
SVP For Diagnostic Services |
RSU Award |
9,009 |
$204.96 |
$1.85M |
9,009 |
| 2026-02-18 |
Doherty Catherine T. |
EVP, Regional Businesses |
RSU Award |
13,514 |
$204.96 |
$2.77M |
13,514 |
| 2026-02-18 |
Davis J. E. |
CEO and President |
RSU Award |
73,225 |
$204.96 |
$15.01M |
73,225 |
| 2026-02-18 |
Samad Sam |
Executive Vice President & CFO |
RSU Award |
18,303 |
$204.96 |
$3.75M |
18,303 |
| 2026-02-18 |
Deppe Michael J |
SVP, Corp. Controller & CAO |
RSU Award |
1,688 |
$204.96 |
$345.97K |
1,688 |
| 2026-02-18 |
Kuppusamy Karthik |
SVP, Clinical Solutions |
Tax Withholding of RSU |
259 |
$206.99 |
$53.61K |
7,914 |
| 2026-02-18 |
Delaney Mark E |
SVP & Chief Commercial Officer |
RSU Award |
7,332 |
$204.96 |
$1.5M |
7,332 |
| 2026-02-13 |
Doherty Catherine T. |
EVP, Regional Businesses |
Option Exercise (Sell) |
26,165 |
$112.17 |
$2.93M |
- |
| 2026-02-10 |
Plewman Patrick |
SVP For Diagnostic Services |
Option Exercise (Sell) |
5,662 |
$121.81 |
$689.66K |
- |
| 2026-01-28 |
Plewman Patrick |
SVP For Diagnostic Services |
RSU Award |
48 |
$183.51 |
$8.81K |
15,381 |
| 2026-01-28 |
Carter Robert B |
Director |
Small Transaction |
6 |
$183.51 |
$1.1K |
2,704 |
| 2026-01-28 |
Gregg Vicky B |
Director |
Small Transaction |
67 |
$183.51 |
$12.3K |
17,104 |
| 2026-01-28 |
Samad Sam |
Executive Vice President & CFO |
RSU Award |
69 |
$183.51 |
$12.66K |
27,910 |
| 2026-01-28 |
Lassiter Wright Iii |
Director |
Small Transaction |
7 |
$183.51 |
$1.28K |
9,057 |
| 2026-01-28 |
Kuppusamy Karthik |
SVP, Clinical Solutions |
Small Transaction |
16 |
$183.52 |
$2.94K |
10,065 |
| 2026-01-28 |
Delaney Mark E |
SVP & Chief Commercial Officer |
Small Transaction |
15 |
$183.51 |
$2.75K |
8,696 |
| 2025-11-25 |
Gregg Vicky B |
Director |
Informative Sell |
1,250 |
$191.76 |
$239.7K |
17,037 |
| 2025-11-25 |
Davis J. E. |
CEO and President |
Option Exercise (Sell) |
55,093 |
$95.80 |
$5.28M |
- |
| 2025-11-18 |
Delaney Mark E |
SVP & Chief Commercial Officer |
Option Exercise (Sell) |
7,846 |
$144.47 |
$1.13M |
- |
| 2025-11-05 |
Davis J. E. |
CEO and President |
Tax Withholding of RSU |
7,143 |
$175.57 |
$1.25M |
120,480 |
| 2025-10-23 |
Pfeiffer Gary M |
Director |
Discretionary Sell |
4,413 |
- |
- |
- |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
