Casdin Partners GP, LLC 4

4 · GeneDx Holdings Corp. · Filed Jun 8, 2026

AI-generated summary of this filing

Updated Jun 8, 2026

GeneDx (WGS) 10% Owner Casdin Capital Buys 200,000 Shares

What Happened

Casdin Capital, LLC — identified as a 10% owner of GeneDx (ticker: WGS) — reported two open-market purchases totaling 200,000 shares. On 2026-06-04 it acquired 150,000 shares at $56.44 each ($8,466,735) and on 2026-06-05 it acquired 50,000 shares at $52.86 each ($2,642,830), for a combined outlay of approximately $11.11 million. These were outright purchases (code P), which are generally viewed as a purchase/bullish signal rather than a sale.

Key Details

Transaction dates & prices:
- 2026-06-04: 150,000 shares @ $56.44 — $8,466,735
- 2026-06-05: 50,000 shares @ $52.86 — $2,642,830
Total shares purchased: 200,000; total value: ≈ $11.11M.
Shares owned after transaction: not specified in the provided filing details.
Notable footnotes:
- F1 indicates those securities are directly owned by Casdin Partners Master Fund, L.P. and may be indirectly beneficially owned by Casdin Capital, the GP, and Eli Casdin.
- F2–F4 show related holdings directly held by Eli Casdin, the GP, and CMLS Holdings; Eli Casdin is noted in governance roles that share voting/investment discretion.
- Each reporting person disclaims beneficial ownership except to the extent of any pecuniary interest.
Filing timeliness: Form filed 2026-06-08 covering trades on 2026-06-04 and 2026-06-05. The filing does not indicate a late-report flag in the provided data; investors can verify the SEC filing timestamp for timeliness.

Context

These purchases were reported by a 10% owner / investment-adviser-related entity (institutional/insider group), not necessarily an operating executive. Purchases by large shareholders can indicate added exposure by the fund or related parties but do not by themselves reveal motive.
No options exercises, awards, gifts, or tax-withholding transactions were reported in these entries — only open-market purchases.

Form 4

Period: 2026-06-04

Director10% Owner

Transactions

Purchase
Class A Common Stock, par value $0.0001 per share
[F1]
2026-06-04$56.44/sh+150,000$8,466,735→ 3,657,164 total(indirect: See footnote)
Purchase
Class A Common Stock, par value $0.0001 per share
[F1]
2026-06-05$52.86/sh+50,000$2,642,830→ 3,707,164 total(indirect: See footnote)

Holdings

Class A Common Stock, par value $0.0001 per share
[F2]
20,517
Class A Common Stock, par value $0.0001 per share
[F3]
(indirect: See footnote)
19,247
Class A Common Stock, par value $0.0001 per share
[F4]
(indirect: See footnote)
333,144

Footnotes (4)

[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.

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