Over the 90-day window ending January 10, 2026, GeneDx Holdings's three dominant insider ownership positions are held by Director Capital, Llc Casdin (6.51Mn shares), Director Keith A. Meister (3.08Mn shares), TenPercentOwner School Of Medicine At Mount Sinai Icahn (2.72Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Eli Casdin | 453,376 | 07 Aug, 2025 | |
| Capital, Llc Casdin | 6,514,328 | 05 Aug, 2024 | |
| Keith A. Meister | 3,078,758 | 23 Jun, 2025 | |
| School Of Medicine At Mount Sinai Icahn | 2,719,692 | 19 Nov, 2024 | |
| Health, Inc. Opko | 2,646,972 | 19 Aug, 2024 | |
| Daniel Emmett Clark | Secretary And General Counsel | 9,460 | 27 Jul, 2022 |
| Isaac Ro | 7,394 | 10 Aug, 2022 | |
| Eric Schadt | President & Chief R&D Officer | 7,374 | 24 May, 2022 |
| Sema4 Holdings L.P. Bto | 4,918 | 03 May, 2022 | |
| Tactical Opportunities Associates Iii - Nq L.P. Blackstone | 4,918 | 03 May, 2022 | |
| Joshua Ruch | 149,806 | 23 Jun, 2025 | |
| Jason Ryan | 115,188 | 27 Aug, 2025 | |
| Rachel E. Sherman | 1,766 | 04 May, 2023 | |
| Richard C Jr Pfenniger | 41,506 | 23 Jun, 2025 | |
| Nat Turner | 1,146 | 12 May, 2022 | |
| Shawn Assad | Chief Accounting Officer | 973 | 12 May, 2022 |
| Kareem Saad | Chief Transformation Officer | 29,517 | 19 Mar, 2024 |
| Richard Miao | 753 | 26 Aug, 2022 | |
| James Coffin | President And Coo | 694 | 03 Dec, 2021 |
| Emily M. Leproust | 21,276 | 23 Jun, 2025 | |
| Michael J Pellini | 519 | 18 Oct, 2022 | |
| Katherine Stueland | Chief Executive Officer | 14,237 | 18 Dec, 2025 |
| Anthony Prentice | Chief Product Officer | 367 | 27 Jul, 2022 |
| Kevin Feeley | Chief Financial Officer | 8,731 | 18 Dec, 2025 |
| Karen Ann White | Chief People Officer | 4,761 | 27 Jul, 2023 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | A | 18,750 | $0.00 | 25,094 | D | M |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 940 | $144.27 | 19,471 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 369 | $138.93 | 24,725 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 2,679 | $141.20 | 21,015 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 74 | $150.75 | 14,593 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 1,031 | $140.08 | 23,694 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 604 | $142.12 | 20,411 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 932 | $148.55 | 14,941 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 1,970 | $146.93 | 15,873 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 274 | $149.20 | 14,667 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 1,628 | $145.36 | 17,843 | D | S |
| 16 Dec, 2025 | Katherine Stueland | Class A Common Stock | D | 356 | $140.95 | 14,237 | D | S |
| 16 Dec, 2025 | Kevin Feeley | Class A Common Stock | D | 699 | $146.93 | 9,312 | D | S |
| 16 Dec, 2025 | Kevin Feeley | Class A Common Stock | D | 127 | $140.45 | 8,731 | D | S |
| 16 Dec, 2025 | Kevin Feeley | Class A Common Stock | A | 7,197 | $0.00 | 12,586 | D | M |
| 16 Dec, 2025 | Kevin Feeley | Class A Common Stock | D | 334 | $144.27 | 10,589 | D | S |
| 16 Dec, 2025 | Kevin Feeley | Class A Common Stock | D | 951 | $141.20 | 11,138 | D | S |
| 16 Dec, 2025 | Kevin Feeley | Class A Common Stock | D | 97 | $149.20 | 8,884 | D | S |
| 16 Dec, 2025 | Kevin Feeley | Class A Common Stock | D | 215 | $142.12 | 10,923 | D | S |
| 16 Dec, 2025 | Kevin Feeley | Class A Common Stock | D | 331 | $148.55 | 8,981 | D | S |