DGX's three largest insider shareholders as of June 06, 2026 are Stephen H Rusckowski (Chairman, Ceo And President, 389.60K shares), J. E. Davis (Ceo And President, 142.42K shares), Mark Guinan (Executive Vice President Cfo, 98.98K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Gail R Wilensky | - | 20,506 | 0 | 19 May, 2023 |
| Gary M Pfeiffer | - | 29,431 | 0 | 24 Oct, 2025 |
| Stephen H Rusckowski | Chairman, Ceo And President | 389,597 | 0 | 08 Mar, 2023 |
| Timothy L Main | - | 26,297 | 0 | 19 May, 2025 |
| Robert B Carter | - | 2,711 | 0 | 24 Apr, 2026 |
| Timothy M Ring | - | 29,507 | 0 | 19 May, 2025 |
| Michael E Prevoznik | Svp General Counsel | 37,557 | 0 | 06 Mar, 2026 |
| Denise M Morrison | - | 10,742 | 0 | 19 May, 2025 |
| Timothy C Wentworth | - | 215 | 0 | 11 Mar, 2026 |
| Patrick Plewman | Svp For Diagnostic Services | 15,247 | 0 | 24 Apr, 2026 |
| Mark Guinan | Executive Vice President Cfo | 98,981 | 0 | 09 Mar, 2022 |
| Vicky B Gregg | - | 17,172 | 0 | 24 Apr, 2026 |
| Catherine T. Doherty | Evp, Regional Businesses | 67,122 | 0 | 06 Mar, 2026 |
| Tracey Doi | - | 6,490 | 0 | 19 May, 2025 |
| J. E. Davis | Ceo And President | 142,423 | 0 | 06 Mar, 2026 |
| Sam Samad | Executive Vice President Cfo | 33,376 | 0 | 24 Apr, 2026 |
| Manner Carrie Eglinton | Svp, Advanced Diagnostics | 48,391 | 0 | 09 Mar, 2022 |
| Luis Diaz | - | 4,054 | 0 | 19 May, 2025 |
| Michael J Deppe | Svp, Corp. Controller Cao | 35,196 | 0 | 06 Mar, 2026 |
| Wright Iii Lassiter | - | 9,063 | 0 | 24 Apr, 2026 |
| Karthik Kuppusamy | Svp, Clinical Solutions | 13,490 | 0 | 24 Apr, 2026 |
| Mark A Gardner | Svp Of Molecular Gen Oncol | 4,673 | 0 | 26 Sep, 2024 |
| Mark E Delaney | Svp Chief Commercial Officer | 11,901 | 0 | 24 Apr, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 20 Apr, 2026 | Robert B Carter | Common Stock | A | 7 | $194.70 | 2,711 | D | L |
| 20 Apr, 2026 | Wright Iii Lassiter | Common Stock | A | 6 | $194.70 | 9,063 | D | L |
| 20 Apr, 2026 | Patrick Plewman | Common Stock | A | 49 | $194.70 | 15,247 | D | L |
| 20 Apr, 2026 | Sam Samad | Common Stock | A | 108 | $194.70 | 33,376 | D | A |
| 20 Apr, 2026 | Karthik Kuppusamy | Common Stock | A | 39 | $194.70 | 13,490 | D | L |
| 20 Apr, 2026 | Mark E Delaney | Common Stock | A | 37 | $194.70 | 11,901 | D | L |
| 20 Apr, 2026 | Vicky B Gregg | Common Stock | A | 68 | $194.70 | 17,172 | D | A |
| 20 Apr, 2026 | Sam Samad | Common Stock | A | 108 | $194.70 | 33,376 | D | A |
| 01 Apr, 2026 | Timothy C Wentworth | Phantom Stock Units | A | 198 | $0.00 | 198 | D | A |
| 09 Mar, 2026 | Timothy C Wentworth | Common Stock | A | 215 | $0.00 | 215 | D | A |
| 04 Mar, 2026 | Patrick Plewman | Common Stock | A | 5,682 | $204.86 | 20,880 | D | A |
| 04 Mar, 2026 | Michael J Deppe | Common Stock | A | 1,473 | $204.86 | 35,946 | D | A |
| 04 Mar, 2026 | Mark E Delaney | Common Stock | A | 5,682 | $204.86 | 14,190 | D | A |
| 04 Mar, 2026 | Michael E Prevoznik | Common Stock | A | 7,232 | $204.86 | 44,789 | D | A |
| 04 Mar, 2026 | Catherine T. Doherty | Common Stock | A | 11,364 | $204.86 | 78,486 | D | A |
| 04 Mar, 2026 | J. E. Davis | Common Stock | A | 51,652 | $204.86 | 168,837 | D | A |
| 04 Mar, 2026 | Sam Samad | Common Stock | A | 13,947 | $204.86 | 40,988 | D | A |
| 04 Mar, 2026 | Karthik Kuppusamy | Common Stock | A | 6,200 | $204.86 | 16,069 | D | A |
| 04 Mar, 2026 | Sam Samad | Common Stock | A | 13,947 | $204.86 | 40,988 | D | A |
| 04 Mar, 2026 | Sam Samad | Common Stock | A | 13,947 | $204.86 | 40,988 | D | A |