SEC Form 4 · accession 0000919574-26-003907
GeneDx Holdings Corp. · WGS
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owners
Casdin Partners GP, LLC
Director · 10% Owner
Casdin Capital, LLC
Director · 10% Owner
Eli Casdin
Director · 10% Owner
Casdin Partners Master Fund, L.P.
Director · 10% Owner
Period of report
Jun 4, 2026
Accepted (ET)
Jun 8, 2026 · 5:25 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001818331
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Class A Common Stock, par value $0.0001 per shareF1 | Jun 4, 2026 | P | 150,000 | $56.4449 | A | 3,657,164 | I | See footnote |
| Class A Common Stock, par value $0.0001 per shareF1 | Jun 5, 2026 | P | 50,000 | $52.8566 | A | 3,707,164 | I | See footnote |
| Class A Common Stock, par value $0.0001 per shareF2 | holding | — | — | — | 20,517 | D | ||
| Class A Common Stock, par value $0.0001 per shareF3 | holding | — | — | — | 19,247 | I | See footnote | |
| Class A Common Stock, par value $0.0001 per shareF4 | holding | — | — | — | 333,144 | I | See footnote |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The 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.
- F2The securities are owned directly by Eli Casdin.
- F3The 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.
- F4The 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.