Quest Diagnostics Inc (DGX) insider trading
Every open-market stock purchase and sale by Quest Diagnostics Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- Michael E Prevoznik (Vice president) and 2 others sold $8.2M in the last 90 days.
- Last company insider buy: Mark Guinan (CFO), $222K, 12 years ago.
- Congress: Alan Armstrong bought $1K to $15K, 7 months ago.
Last 12 months: insiders bought $0 (0 buys) and sold $37.3M (22 sales). Last close $251.82 on Oct 30, 2026.
Recent DGX insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Oct 26, 2026 | Gary M Pfeiffer (Director) | Sold | $292K |
| Oct 21, 2026 | Sam Samad (CFO) | Bought (not open market) | $21.2K |
| Oct 21, 2026 | Vicky B Gregg (Director) | Bought (not open market) | $14.9K |
| Oct 21, 2026 | Patrick Plewman (VP) | Bought (not open market) | $9.7K |
| Oct 21, 2026 | Karthik Kuppusamy (VP) | Bought (not open market) | $7.8K |
| Oct 21, 2026 | Mark E Delaney (C-suite exec) | Bought (not open market) | $5.9K |
| Oct 21, 2026 | Timothy L Main (Director) | Bought (not open market) | $4.2K |
| Oct 21, 2026 | Robert B Carter (Director) | Bought (not open market) | $2.4K |
| Oct 21, 2026 | Wright Lassiter III (Director) | Bought (not open market) | $1.4K |
| Oct 1, 2026 | Timothy C Wentworth (Director) | Bought (not open market) | — |
| Sep 1, 2026 | J. E. Davis (CEO) | Sold | $2.4M |
| Aug 28, 2026 | Michael E Prevoznik (VP) | Sold | $3.9M |
| Aug 28, 2026 | Michael E Prevoznik (VP) | Bought (not open market) | $2.5M |
| Aug 28, 2026 | Michael E Prevoznik (VP) | Sold | $1.5M |
| Aug 28, 2026 | Michael E Prevoznik (VP) | Sold | $105K |
| Aug 28, 2026 | Michael E Prevoznik (VP) | Sold (not open market) | — |
| Jul 28, 2026 | Mark E Delaney (C-suite exec) | Sold | $376K |
| Jul 22, 2026 | Sam Samad (CFO) | Bought (not open market) | $21.1K |
| Jul 22, 2026 | Vicky B Gregg (Director) | Bought (not open market) | $14.9K |
| Jul 22, 2026 | Patrick Plewman (VP) | Bought (not open market) | $9.5K |
| Jul 22, 2026 | Karthik Kuppusamy (VP) | Bought (not open market) | $7.7K |
| Jul 22, 2026 | Mark E Delaney (C-suite exec) | Bought (not open market) | $7K |
| Jul 22, 2026 | Timothy L Main (Director) | Bought (not open market) | $4.3K |
| Jul 22, 2026 | Robert B Carter (Director) | Bought (not open market) | $2.3K |
| Jul 22, 2026 | Wright Lassiter III (Director) | Bought (not open market) | $1.2K |
Who's trading DGX
- Gary M Pfeiffer, Director: sold $292K (1 sale), last Oct 26, 2026
- Robert B Carter, Director: other filings, last Oct 21, 2026
- Sam Samad, CFO: other filings, last Oct 21, 2026
- Mark E Delaney, C-suite exec: sold $1.9M (2 sales), last Oct 21, 2026
- Patrick Plewman, VP: sold $2M (4 sales), last Oct 21, 2026
- Timothy L Main, Director: other filings, last Oct 21, 2026
- Wright Lassiter III, Director: other filings, last Oct 21, 2026
- Vicky B Gregg, Director: sold $240K (1 sale), last Oct 21, 2026
- Karthik Kuppusamy, VP: sold $2.2M (2 sales), last Oct 21, 2026
- Timothy C Wentworth, Director: other filings, last Oct 1, 2026
- J. E. Davis, CEO: sold $17.1M (6 sales), last Sep 1, 2026
- Michael E Prevoznik, VP: sold $6.6M (6 sales), last Aug 28, 2026
- Tracey Doi, Director: other filings, last May 20, 2026
- Luis Diaz, Director: other filings, last May 20, 2026
- Timothy M Ring, Director: other filings, last May 20, 2026
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