DGX
Quest Diagnostics Incorporated
NYSE: DGX · HEALTHCARE · DIAGNOSTICS & RESEARCH
$235.02
+1.68% today
Updated 2026-09-11
Market cap
$25.99B
P/E ratio
25.03
P/S ratio
2.25x
EPS (TTM)
$9.41
Dividend yield
1.40%
52W range
$169 – $247
Volume
1.0M
Quest Diagnostics Incorporated (DGX) Insider transactions
Net insider activity
Net buying (47,869 shares)
Buy transactions
51
Sell transactions
49
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-01 | DAVIS, J. E. | Director, CEO and President | Sale | 10,000 | $242.72 | $2.43M |
| 2026-08-28 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 22,677 | $112.17 | $2.54M |
| 2026-08-28 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Buy | 22,677 | $112.17 | $2.54M |
| 2026-08-28 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 16,010 | $242.88 | $3.89M |
| 2026-08-28 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 6,237 | $243.63 | $1.52M |
| 2026-08-28 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 1,000 | — | — |
| 2026-08-28 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 430 | $244.51 | $105141.36 |
| 2026-07-28 | DELANEY, MARK E | SVP & Chief Commercial Officer | Sale | 1,600 | $235.18 | $376288.00 |
| 2026-07-22 | SAMAD, SAM | Executive Vice President & CFO | Buy | 102 | $206.81 | $21094.31 |
| 2026-07-22 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Buy | 46 | $206.81 | $9513.12 |
| 2026-07-22 | MAIN, TIMOTHY L | Director | Buy | 21 | $206.81 | $4343.01 |
| 2026-07-22 | LASSITER, WRIGHT III | Director | Buy | 6 | $206.81 | $1240.88 |
| 2026-07-22 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Buy | 37 | $206.81 | $7651.86 |
| 2026-07-22 | GREGG, VICKY B | Director | Buy | 72 | $206.81 | $14890.18 |
| 2026-07-22 | DELANEY, MARK E | SVP & Chief Commercial Officer | Buy | 34 | $206.81 | $7031.44 |
| 2026-07-22 | CARTER, ROBERT B | Director | Buy | 11 | $206.80 | $2274.84 |
| 2026-07-01 | WENTWORTH, TIMOTHY C | Director | Buy | 144 | — | — |
| 2026-06-04 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Sale | 4,827 | $121.81 | $587952.73 |
| 2026-06-04 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Sale | 3,320 | $127.73 | $424047.00 |
| 2026-06-04 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Sale | 8,147 | $200.00 | $1.63M |
| 2026-06-04 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Buy | 4,827 | $121.81 | $587952.73 |
| 2026-06-04 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Buy | 3,320 | $127.73 | $424047.00 |
| 2026-06-01 | DAVIS, J. E. | Director, CEO and President | Sale | 10,000 | $194.14 | $1.94M |
| 2026-05-20 | WENTWORTH, TIMOTHY C | Director | Buy | 1,142 | — | — |
| 2026-05-20 | RING, TIMOTHY M | Director | Buy | 1,142 | — | — |
| 2026-05-20 | PFEIFFER, GARY M | Director | Buy | 1,142 | — | — |
| 2026-05-20 | MORRISON, DENISE M | Director | Buy | 1,142 | — | — |
| 2026-05-20 | MAIN, TIMOTHY L | Director | Buy | 1,142 | — | — |
| 2026-05-20 | LASSITER, WRIGHT III | Director | Buy | 1,142 | — | — |
| 2026-05-20 | GREGG, VICKY B | Director | Buy | 1,142 | — | — |
| 2026-05-20 | DOI, TRACEY | Director | Buy | 1,142 | — | — |
| 2026-05-20 | DIAZ, LUIS | Director | Buy | 1,142 | — | — |
| 2026-05-20 | CARTER, ROBERT B | Director | Buy | 1,142 | — | — |
| 2026-04-20 | SAMAD, SAM | Executive Vice President & CFO | Buy | 108 | $194.70 | $21027.38 |
| 2026-04-20 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Buy | 49 | $194.70 | $9540.25 |
| 2026-04-20 | LASSITER, WRIGHT III | Director | Buy | 6 | $194.70 | $1168.19 |
| 2026-04-20 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Buy | 39 | $194.70 | $7593.26 |
| 2026-04-20 | GREGG, VICKY B | Director | Buy | 68 | $194.70 | $13239.46 |
| 2026-04-20 | DELANEY, MARK E | SVP & Chief Commercial Officer | Buy | 37 | $194.70 | $7203.75 |
| 2026-04-20 | CARTER, ROBERT B | Director | Buy | 7 | $194.70 | $1362.89 |
| 2026-04-01 | WENTWORTH, TIMOTHY C | Director | Buy | 198 | — | — |
| 2026-03-09 | WENTWORTH, TIMOTHY C | Director | Buy | 215 | — | — |
| 2026-03-05 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 3,878 | $206.21 | $799682.38 |
| 2026-03-05 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Sale | 2,855 | $206.21 | $588729.55 |
| 2026-03-05 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Sale | 5,558 | $206.21 | $1.15M |
| 2026-03-04 | SAMAD, SAM | Executive Vice President & CFO | Buy | 13,947 | $204.86 | $2.86M |
| 2026-03-04 | SAMAD, SAM | Executive Vice President & CFO | Sale | 7,720 | $204.86 | $1.58M |
| 2026-03-04 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Buy | 7,232 | $204.86 | $1.48M |
| 2026-03-04 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 3,354 | $204.86 | $687100.44 |
| 2026-03-04 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Buy | 5,682 | $204.86 | $1.16M |
| 2026-03-04 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Sale | 2,827 | $204.86 | $579139.22 |
| 2026-03-04 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Buy | 6,200 | $204.86 | $1.27M |
| 2026-03-04 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Sale | 2,628 | $204.86 | $538372.08 |
| 2026-03-04 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Buy | 11,364 | $204.86 | $2.33M |
| 2026-03-04 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Sale | 5,806 | $204.86 | $1.19M |
| 2026-03-04 | DEPPE, MICHAEL J | SVP, Corp. Controller & CAO | Buy | 1,473 | $204.86 | $301758.78 |
| 2026-03-04 | DEPPE, MICHAEL J | SVP, Corp. Controller & CAO | Sale | 750 | $204.86 | $153645.00 |
| 2026-03-04 | DELANEY, MARK E | SVP & Chief Commercial Officer | Buy | 5,682 | $204.86 | $1.16M |
| 2026-03-04 | DELANEY, MARK E | SVP & Chief Commercial Officer | Sale | 2,326 | $204.86 | $476504.36 |
| 2026-03-04 | DAVIS, J. E. | Director, CEO and President | Buy | 51,652 | $204.86 | $10.58M |
| 2026-03-04 | DAVIS, J. E. | Director, CEO and President | Sale | 26,414 | $204.86 | $5.41M |
| 2026-03-03 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 526 | $207.73 | $109265.98 |
| 2026-03-03 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Sale | 410 | $207.73 | $85169.30 |
| 2026-03-03 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Sale | 632 | $207.73 | $131285.36 |
| 2026-03-02 | SAMAD, SAM | Executive Vice President & CFO | Sale | 869 | $204.86 | $178023.34 |
| 2026-03-02 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 288 | $204.86 | $58999.68 |
| 2026-03-02 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Sale | 230 | $204.86 | $47117.80 |
| 2026-03-02 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Sale | 205 | $204.86 | $41996.30 |
| 2026-03-02 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Sale | 648 | $204.86 | $132749.28 |
| 2026-03-02 | DEPPE, MICHAEL J | SVP, Corp. Controller & CAO | Sale | 88 | $204.86 | $18027.68 |
| 2026-03-02 | DELANEY, MARK E | SVP & Chief Commercial Officer | Sale | 188 | $204.86 | $38513.68 |
| 2026-03-02 | DAVIS, J. E. | Director, CEO and President | Sale | 10,000 | $212.52 | $2.13M |
| 2026-03-02 | DAVIS, J. E. | Director, CEO and President | Sale | 2,968 | $204.86 | $608024.48 |
| 2026-02-19 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 1,111 | $204.83 | $227566.13 |
| 2026-02-19 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Sale | 958 | $204.83 | $196227.14 |
| 2026-02-19 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Sale | 1,433 | $204.83 | $293521.39 |
| 2026-02-18 | SAMAD, SAM | Executive Vice President & CFO | Buy | 18,303 | — | — |
| 2026-02-18 | SAMAD, SAM | Executive Vice President & CFO | Buy | 3,965 | — | — |
| 2026-02-18 | SAMAD, SAM | Executive Vice President & CFO | Sale | 1,010 | $206.99 | $209059.90 |
| 2026-02-18 | SAMAD, SAM | Executive Vice President & CFO | Sale | 855 | $210.01 | $179558.55 |
| 2026-02-18 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Buy | 9,289 | — | — |
| 2026-02-18 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Buy | 2,013 | — | — |
| 2026-02-18 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 347 | $206.99 | $71825.53 |
| 2026-02-18 | PREVOZNIK, MICHAEL E | SVP & General Counsel | Sale | 301 | $210.01 | $63213.01 |
| 2026-02-18 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Buy | 9,009 | — | — |
| 2026-02-18 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Buy | 1,952 | — | — |
| 2026-02-18 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Sale | 293 | $206.99 | $60648.07 |
| 2026-02-18 | PLEWMAN, PATRICK | SVP for Diagnostic Services | Sale | 244 | $210.01 | $51242.44 |
| 2026-02-18 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Buy | 9,853 | — | — |
| 2026-02-18 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Buy | 2,135 | — | — |
| 2026-02-18 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Sale | 259 | $206.99 | $53610.41 |
| 2026-02-18 | KUPPUSAMY, KARTHIK | SVP, Clinical Solutions | Sale | 252 | $210.01 | $52922.52 |
| 2026-02-18 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Buy | 13,514 | — | — |
| 2026-02-18 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Buy | 2,928 | — | — |
| 2026-02-18 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Sale | 728 | $206.99 | $150688.72 |
| 2026-02-18 | DOHERTY, CATHERINE T. | EVP, Regional Businesses | Sale | 433 | $210.01 | $90934.33 |
| 2026-02-18 | DEPPE, MICHAEL J | SVP, Corp. Controller & CAO | Buy | 1,688 | — | — |
| 2026-02-18 | DEPPE, MICHAEL J | SVP, Corp. Controller & CAO | Buy | 366 | — | — |
| 2026-02-18 | DEPPE, MICHAEL J | SVP, Corp. Controller & CAO | Sale | 99 | $206.99 | $20492.01 |
| 2026-02-18 | DEPPE, MICHAEL J | SVP, Corp. Controller & CAO | Sale | 83 | $210.01 | $17430.83 |
Frequently asked questions
Are DGX insiders buying or selling?
Over the transactions on record, DGX insiders have been net buyers, with about $33.91M in stock sold across 49 sales, against 26 open-market purchases.
Does insider selling at DGX mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which DGX insiders are selling the most?
Recent selling is concentrated in a few names. DAVIS, J. E. accounts for the largest share on record, with about $12.51M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.