DGX
QUEST DIAGNOSTICS INC · Healthcare · Market cap $27.9B
Insiders sold $8.2M net in the last 90 days ·3 sellers, 0 buyers· 3 of 3 sales under Rule 10b5-1 plans· latest Form 4 filed Oct 28, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$37.3M
reported sales (SEC code S)
Unique Insiders
8
in the rolling window
Latest filing
Oct 28, 2026
PFEIFFER GARY M
QUEST DIAGNOSTICS INC (DGX) has 53 SEC Form 4 filings (106 transaction rows) in the rolling window, disclosed by 8 distinct insiders. Most recent filing: Oct 28, 2026.
Inside the rolling window, 8 insiders at QUEST DIAGNOSTICS INC reported no open-market purchases and 22 open-market sales totaling $37.3M. The most active filer is CEO and President Davis J. E. with 4 filings. Insiders have net sold $12.2M over the trailing 6 months. The most recent open-market filing is a sale of 1,203 shares by Director PFEIFFER GARY M, dated Oct 26, 2026, worth $292K.
- Industry:Medical - Diagnostics & Research
- CEO:James E. Davis
- Employees:51,500
- HQ:Secaucus, NJ, US
- IPO:1996-12-17
| Source | |||||||
|---|---|---|---|---|---|---|---|
PFEIFFER GARY MFirst filing | Director | Sale | 1,203 | $292K | Oct 28 | +3.0% | SEC ↗ |
Davis J. E.First in 3 months | CEO and President | Sale | 10,000 | $2.4M | Sep 3 | +5.6% | SEC ↗ |
PREVOZNIK MICHAEL EFirst in 6 months | SVP & General Counsel | Sale | 22,677 | $5.5M | Aug 31 | +5.3% | SEC ↗ |
DELANEY MARK EFirst in 8 months | SVP & Chief Commercial Officer | Sale | 1,600 | $376K | Jul 29 | +7.5% | SEC ↗ |
KUPPUSAMY KARTHIKFirst in 3 months | SVP, Clinical Solutions | Sale | 8,147 | $1.6M | Jun 8 | +28.2% | SEC ↗ |
Davis J. E.First in 3 months | CEO and President | Sale | 10,000 | $1.9M | Jun 2 | +30.9% | SEC ↗ |
| SVP for Diagnostic Services | Sale | 2,855 | $589K | Mar 6 | +27.0% | SEC ↗ | |
| EVP, Regional Businesses | Sale | 5,558 | $1.1M | Mar 6 | +27.0% | SEC ↗ | |
| SVP & General Counsel | Sale | 3,878 | $800K | Mar 6 | — | SEC ↗ | |
KUPPUSAMY KARTHIKFirst filing | SVP, Clinical Solutions | Sale | 2,628 | $538K | Mar 6 | — | SEC ↗ |
Davis J. E.First in 3 months | CEO and President | Sale | 10,000 | $2.1M | Mar 4 | — | SEC ↗ |
| EVP, Regional Businesses | Sale | 632 | $131K | Mar 4 | — | SEC ↗ | |
| SVP & General Counsel | Sale | 526 | $109K | Mar 4 | — | SEC ↗ | |
| SVP for Diagnostic Services | Sale | 410 | $85K | Mar 4 | — | SEC ↗ | |
| EVP, Regional Businesses | Sale | 1,433 | $294K | Feb 20 | — | SEC ↗ | |
| SVP for Diagnostic Services | Sale | 958 | $196K | Feb 20 | — | SEC ↗ | |
PREVOZNIK MICHAEL EFirst filing | SVP & General Counsel | Sale | 1,111 | $228K | Feb 20 | — | SEC ↗ |
Doherty Catherine T.First filing | EVP, Regional Businesses | Sale | 26,165 | $5.4M | Feb 17 | — | SEC ↗ |
Plewman PatrickFirst filing | SVP for Diagnostic Services | Sale | 5,662 | $1.2M | Feb 12 | — | SEC ↗ |
Davis J. E.First filing | CEO and President | Sale | 55,093 | $10.6M | Nov 28 | — | SEC ↗ |
Gregg Vicky BFirst filing | Director | Sale | 1,250 | $240K | Nov 28 | — | SEC ↗ |
DELANEY MARK EFirst filing | SVP & Chief Commercial Officer | Sale | 7,946 | $1.5M | Nov 20 | — | SEC ↗ |
Earnings: last 7 quarters
Congress trading DGX 45 all-time
- RRep. Carol Devine MillerSale$15,001 - $50,0002025-03-10
- DRep. Julie JohnsonPurchase$1,001 - $15,0002025-10-30
- DRep. Julie JohnsonSale$1,001 - $15,0002025-10-30
- RSen. Alan ArmstrongPurchase$1,001 - $15,0002026-03-27
- RSen. Alan ArmstrongPurchase$1,001 - $15,0002026-03-27
- RRep. Julia LetlowOther$1,001 - $15,0002025-07-24
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does DGX have?
QUEST DIAGNOSTICS INC (DGX) has 53 SEC Form 4 filings (106 transaction rows) in the rolling 365-day window, disclosed by 8 distinct insiders. Most recent filing: Oct 28, 2026.
When was the most recent SEC Form 4 filing for DGX?
The most recent Form 4 filing for DGX on Tracefour is dated Oct 28, 2026.
Who is the most active insider at DGX?
The most active SEC Form 4 filer at DGX in the rolling window is CEO and President Davis J. E., with 4 filings.
What is the net insider flow at DGX over the last 6 months?
Over the trailing 180 days, insiders at DGX have net sold $12.2M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at DGX in the current window?
Inside the rolling window, insiders at DGX bought $0 and sold $37.3M based on SEC Form 4 filings.
Can I get alerts for DGX insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at QUEST DIAGNOSTICS INC (DGX). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
QUEST DIAGNOSTICS INC is in the Healthcare sector.