Casdin Capital, LLC - Aug 22, 2025 Form 4 Insider Report for GeneDx Holdings Corp. (WGS)

Signature
Casdin Capital LLC, By: /s/ Eli Casdin, Managing Member
Stock symbol
WGS
Transactions as of
Aug 22, 2025
Transactions value $
-$60,451,950
Form type
4
Date filed
8/22/2025, 06:55 PM
Previous filing
May 15, 2025

Reporting Owners (4)

Name Relationship Address Signature Signature date CIK
Casdin Capital, LLC Director, 10%+ Owner 1350 AVENUE OF THE AMERICAS, SUITE 2600, NEW YORK Casdin Capital LLC, By: /s/ Eli Casdin, Managing Member 2025-08-22 0001534261
Casdin Partners Master Fund, L.P. Director, 10%+ Owner 1350 AVENUE OF THE AMERICAS, SUITE 2600, NEW YORK Casdin Partners Master Fund, LP, By: Casdin Partners GP, LLC, its General Partner, By: /s/ Eli Casdin, Managing Member 2025-08-22 0001534265
Casdin Partners GP, LLC Director, 10%+ Owner 1350 AVENUE OF THE AMERICAS, SUITE 2600, NEW YORK Casdin Partners GP LLC, By: /s/ Eli Casdin, Managing Member, /s/ Eli Casdin, Eli Casdin 2025-08-22 0001534260
Casdin Eli Director, 10%+ Owner 1350 AVENUE OF THE AMERICAS, SUITE 2600, NEW YORK /s/ Eli Casdin, Eli Casdin 2025-08-22 0001534264

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction WGS Class A Common Stock Sale -$60.5M -500K -14.26% $120.90 3.01M Aug 22, 2025 See footnote F1
holding WGS Class A Common Stock 20.5K Aug 22, 2025 Direct F2
holding WGS Class A Common Stock 19.2K Aug 22, 2025 See footnote F3
holding WGS Class A Common Stock 333K Aug 22, 2025 See footnote F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The securities are owned directly by the Casdin Partners Master Fund, L.P. (the "Master Fund") and may be deemed to be indirectly beneficially owned by (i) Casdin Capital, LLC, the investment adviser to the Master Fund ("Casdin"), (ii) Casdin Partners GP, LLC, the general partner of the Master Fund (the "GP"), and (iii) Eli Casdin, the managing member of Casdin and the GP.
F2 The securities are owned directly by Eli Casdin.
F3 The securities are owned directly by the GP and may be deemed to be indirectly beneficially owned by Eli Casdin, the managing member of the GP.
F4 The securities are owned directly by CMLS Holdings LLC ("CMLS Holdings"). The Board of Managers of CMLS Holdings includes Eli Casdin, who, as a member of the Board of Managers of CMLS Holdings, shares voting and investment discretion with respect to the common stock held by CMLS Holdings.

Remarks:

Each Reporting Person disclaims beneficial ownership in the securities reported on this Form 4 except to the extent of its pecuniary interest, if any, therein, and this report shall not be deemed to be an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.