Updated Jul 16, 2026 · Last SEC filing 2026-07-02
QUEST DIAGNOSTICS INC (DGX) has filed 20 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-02. 4 Form 8-K material event filings were reported by DGX in the last 90 days. 2 Form 144 notices of proposed sale were filed for DGX stock. InsiderAlpha tracks every DGX SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Services-Medical Laboratories (SIC 8071) |
|---|---|
| SEC CIK | 0001022079 |
| Form 4 filings (90d) | 20 |
|---|---|
| Form 8-K filings (90d) | 4 |
| Form 144 notices (90d) | 2 |
| Latest Form 4 filing | 2026-07-02 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| KUPPUSAMY KARTHIK | SVP, Clinical Solutions | M — Option exercise | 3.3K | $127.72 | $424K | SEC | |
| KUPPUSAMY KARTHIK | SVP, Clinical Solutions | S — Open-market sale | 8.1K | $200.00 | $1.63M | SEC | |
| KUPPUSAMY KARTHIK | SVP, Clinical Solutions | M — Option exercise | 4.8K | $121.81 | $588K | SEC | |
| Davis J. E. | CEO and President | S — Open-market sale | 10.0K | $194.14 | $1.94M | SEC | |
| Doi Tracey | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| Diaz Luis | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| PFEIFFER GARY M | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| RING TIMOTHY M | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| MAIN TIMOTHY L | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| MORRISON DENISE M | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| WENTWORTH TIMOTHY C | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| Lassiter Wright III | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| CARTER ROBERT B | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| Gregg Vicky B | Director | A — Grant or award | 1.1K | $0.00 | — | SEC | |
| KUPPUSAMY KARTHIK | SVP, Clinical Solutions | J — Other acquisition / disposition | 39 | $194.70 | $8K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for QUEST DIAGNOSTICS INC (DGX). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| KUPPUSAMY KARTHIK | 6 | $3.66M |
| Gregg Vicky B | 2 | $13K |
| Lassiter Wright III | 2 | $1K |
| CARTER ROBERT B | 2 | $1K |
| WENTWORTH TIMOTHY C | 2 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in DGX insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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