As of June 06, 2026, the three largest insider holders of WGS are Eli Casdin (Director, 102.15Mn shares), School Of Medicine At Mount Sinai Icahn (TenPercentOwner, 94.61Mn shares), Eli Casdin (Director, 15.99Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Joshua Ruch | - | 0 | 6,410,714 | 03 Feb, 2023 |
| Health, Inc. Opko | - | 2,646,972 | 0 | 19 Aug, 2024 |
| Richard C Jr Pfenniger | - | 41,506 | 0 | 23 Jun, 2025 |
| Keith A. Meister | - | 0 | 3,228,150 | 05 Mar, 2026 |
| Michael J Pellini | - | 17,114 | 0 | 18 Oct, 2022 |
| Capital, Llc Casdin | - | 3,507,164 | 0 | 05 Aug, 2024 |
| Eli Casdin | - | 0 | 102,151,785 | 02 Feb, 2023 |
| Jason Ryan | Executive Chairman | 189,626 | 0 | 04 Jan, 2023 |
| Katherine Stueland | Chief Executive Officer | 91,514 | 0 | 30 Mar, 2026 |
| Emily M. Leproust | - | 37,836 | 0 | 12 May, 2022 |
| Rachel E. Sherman | - | 58,290 | 0 | 04 May, 2023 |
| Nat Turner | - | 37,836 | 0 | 12 May, 2022 |
| Tactical Opportunities Associates Iii - Nq L.P. Blackstone | - | 0 | 162,309 | 03 May, 2022 |
| Isaac Ro | Chief Financial Officer | 244,041 | 0 | 10 Aug, 2022 |
| Eric Schadt | President Chief Rd Officer | 243,380 | 0 | 24 May, 2022 |
| Kareem Saad | Chief Transformation Officer | 101,765 | 0 | 05 Jan, 2023 |
| James Coffin | President And Coo | 22,903 | 0 | 03 Dec, 2021 |
| Shawn Assad | Chief Accounting Officer | 32,107 | 0 | 12 May, 2022 |
| Anthony Prentice | Chief Product Officer | 12,102 | 0 | 27 Jul, 2022 |
| Karen Ann White | Chief People Officer | 4,761 | 0 | 27 Jul, 2023 |
| Daniel Emmett Clark | Secretary And General Counsel | 312,207 | 0 | 27 Jul, 2022 |
| Sema4 Holdings L.P. Bto | - | 0 | 162,309 | 03 May, 2022 |
| School Of Medicine At Mount Sinai Icahn | - | 94,605,473 | 0 | 05 May, 2022 |
| Richard Miao | - | 24,867 | 0 | 26 Aug, 2022 |
| Kevin Feeley | Chief Financial Officer | 34,580 | 0 | 30 Mar, 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 |
|---|---|---|---|---|---|---|---|---|
| 26 Mar, 2026 | Kevin Feeley | Class A Common Stock | A | 16,250 | $0.00 | 43,398 | D | M |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | A | 80,000 | $0.00 | 138,447 | D | M |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | A | 80,000 | $0.00 | 138,447 | D | M |
| 26 Mar, 2026 | Kevin Feeley | Class A Common Stock | D | 2,485 | $61.29 | 40,913 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 13,229 | $61.29 | 125,218 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 13,229 | $61.29 | 125,218 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 5,117 | $62.33 | 120,101 | D | S |
| 26 Mar, 2026 | Kevin Feeley | Class A Common Stock | D | 961 | $62.33 | 39,952 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 5,117 | $62.33 | 120,101 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 13,412 | $63.28 | 106,689 | D | S |
| 26 Mar, 2026 | Kevin Feeley | Class A Common Stock | D | 2,520 | $63.28 | 37,432 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 13,412 | $63.28 | 106,689 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 5,292 | $64.60 | 101,397 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 5,292 | $64.60 | 101,397 | D | S |
| 26 Mar, 2026 | Kevin Feeley | Class A Common Stock | D | 995 | $64.60 | 36,437 | D | S |
| 26 Mar, 2026 | Kevin Feeley | Class A Common Stock | D | 1,857 | $65.21 | 34,580 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 9,883 | $65.21 | 91,514 | D | S |
| 26 Mar, 2026 | Katherine Stueland | Class A Common Stock | D | 9,883 | $65.21 | 91,514 | D | S |
| 26 Mar, 2026 | Kevin Feeley | Restricted Stock Unit | D | 16,250 | $0.00 | 32,500 | D | M |
| 26 Mar, 2026 | Katherine Stueland | Restricted Stock Unit | D | 80,000 | $0.00 | 160,000 | D | M |