Casdin Partners Master Fund, L.P.: insider buys
Every open-market stock purchase reported by Casdin Partners Master Fund, L.P. to the SEC on Form 4.
Total bought$22.59M
Purchases2
Companies2
Last purchase filedMay 20, 2026
Return on these buys+55%
Casdin Partners Master Fund, L.P. has made 2 open-market purchases worth $22.59M in 2 companies since Nov 17, 2025, according to SEC Form 4 filings. The most recent was filed on May 20, 2026: 500,000 shares of WGS at $42.92 (Director, 10% Owner), worth $21.46M. Taken together, these purchases are up 55% at the latest closing prices (split-adjusted, weighted by amount).
Companies Casdin Partners Master Fund, L.P. bought
| Ticker | Company | Role | Buys | Total | Since buy | Last filed |
|---|---|---|---|---|---|---|
| WGS | GeneDx Holdings Corp. | Director, 10% Owner | 1 | $21.46M | +61% | May 20 |
| LAB | Standard Biotools Inc. | Director, 10% Owner | 1 | $1.12M | -50% | Nov 17 |
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| Filed | Stock | Insider | Value | Shares | Price | Since buy | Stake | Trade | |
|---|---|---|---|---|---|---|---|---|---|
| May 20 | WGSGeneDx Holdings Corp. | Casdin Partners Master Fund…Director, 10% Owner | $21.46M | 500,000 | $42.92 | +61% | +19% | May 18 | SEC |
| Nov 17 | LABStandard Biotools Inc. | Casdin Partners Master Fund…Director, 10% Owner | $1.12M | 925,000 | $1.22 | -50% | +2% | Nov 13 | SEC |