Casdin Capital buys 500K GeneDx Holdings shares
GeneDx Holdings Corp. reported that investment entities associated with Casdin Capital made open-market purchases of a total of 500,000 shares of Class A Common Stock.
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Form Type
4
Rhea-AI Filing Summary
GeneDx Holdings Corp. reported that investment entities associated with Casdin Capital made open-market purchases of a total of 500,000 shares of Class A Common Stock. These buys occurred on May 18–20, 2026 at weighted average prices in the low-to-mid $40 range.
After these transactions, an investment fund managed by Casdin Capital reported holding 3,507,164 shares indirectly. Separate positions include 20,517 shares owned directly by Eli Casdin and other indirect holdings of 333,144 and 19,247 shares reported for related entities.
Insider Trade Summary
Net Buyer: 500,000 shares
Net Buy
6 txns
Insider
Casdin Capital, LLC, Casdin Eli, Casdin Partners Master Fund, L.P., Casdin Partners GP, LLC
Role
Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner
Bought
500,000 shs ($21.46M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Purchase | Class A Common Stock, par value $0.0001 per share | 140,000 | $43.8061 | $6.13M |
| Purchase | Class A Common Stock, par value $0.0001 per share | 185,000 | $42.5964 | $7.88M |
| Purchase | Class A Common Stock, par value $0.0001 per share | 175,000 | $42.5517 | $7.45M |
| holding | Class A Common Stock, par value $0.0001 per share | -- | -- | -- |
| holding | Class A Common Stock, par value $0.0001 per share | -- | -- | -- |
| holding | Class A Common Stock, par value $0.0001 per share | -- | -- | -- |
Holdings After Transaction:
Class A Common Stock, par value $0.0001 per share — 3,507,164 shares (Indirect, See footnote);
Class A Common Stock, par value $0.0001 per share — 20,517 shares (Direct);
Class A Common Stock, par value $0.0001 per share — 352,391 shares (Indirect, See foonote)
Footnotes (7)
- F1. The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $42.4573 to $42.9153. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares bought at each separate price within the range set forth in this footnote.
- F2. 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.
- F3. The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $42.1118 to $42.6898. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares bought at each separate price within the range set forth in this footnote.
- F4. The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $43.6287 to $44.3384. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares bought at each separate price within the range set forth in this footnote.
- F5. The securities are owned directly by Eli Casdin.
- F6. 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.
- F7. 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.
Key Figures
Open-market purchase 1: 175,000 shares at $42.5517
Open-market purchase 2: 185,000 shares at $42.5964
Open-market purchase 3: 140,000 shares at $43.8061
+5 more
8 metrics
Open-market purchase 1
175,000 shares at $42.5517
Class A Common Stock bought on May 18, 2026
Open-market purchase 2
185,000 shares at $42.5964
Class A Common Stock bought on May 19, 2026
Open-market purchase 3
140,000 shares at $43.8061
Class A Common Stock bought on May 20, 2026
Total shares bought
500,000 shares
Net open-market purchases May 18–20, 2026
Indirect fund holdings
3,507,164 shares
Class A Common Stock held indirectly after May 20, 2026
Direct Eli Casdin holdings
20,517 shares
Class A Common Stock owned directly as referenced in footnote
Other indirect holdings
333,144 shares
Indirect Class A Common Stock position as of May 18, 2026
Additional indirect holdings
19,247 shares
Indirect Class A Common Stock position as of May 18, 2026
Key Terms
open-market purchase, weighted average price, indirectly beneficially owned, Class A Common Stock, +2 more
6 terms
open-market purchase financial
"transaction_action": "open-market purchase""
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
indirectly beneficially owned financial
"may be deemed to be indirectly beneficially owned by (i) Casdin Capital, LLC"
Class A Common Stock financial
"Class A Common Stock, par value $0.0001 per share"
Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.
ten percent owner financial
""is_ten_percent_owner": 1"
investment adviser financial
"Casdin Capital, LLC, the investment adviser to the Master Fund"
An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transactions did Casdin Capital report for GeneDx Holdings (WGS)?
Investment entities associated with Casdin Capital reported open-market purchases of 500,000 GeneDx Holdings Class A shares on May 18–20, 2026. These transactions were reported as weighted-average price buys in the low-to-mid $40 range, increasing the fund’s indirect ownership stake.
What is the indirect GeneDx (WGS) stake held by the Casdin-managed fund after these trades?
Following the reported open-market purchases, an investment fund managed by Casdin Capital reported indirectly holding 3,507,164 GeneDx Class A shares. This indirect ownership reflects the fund’s position after the May 18–20, 2026 transactions disclosed in the Form 4 filing.
Were the reported GeneDx (WGS) insider purchases made in the open market?
Yes. The transactions are coded as “P” and described as open-market or private purchases. Footnotes clarify that reported prices are weighted averages and that individual trades occurred within specified price ranges for each trading day.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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