Casdin Partners GP, LLC insider trades
Casdin Partners GP, LLC has filed 11 Form 4s with the SEC that we hold, for Standard Biotools INC. (LAB) (Director, 10% owner), Biolife Solutions INC (BLFS) (10% owner), GeneDx Holdings Corp. (WGS) (Director, 10% owner) and TSVT (Director). Across all of them we count 15 purchases worth $19.3M and 1 sale worth $21.4M reported on Form 4. In the last 12 months: 6 purchases ($11.4M) and 1 sale ($21.4M). The largest single trade was a sale of 750,000 shares of Biolife Solutions INC worth $21.4M, dated 2025-10-15. The first filing on our record is dated 2023-05-23 and the latest 2026-05-11.
Standard Biotools INC. (LAB)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2024-05-20 | P, purchase reported on Form 4 | 100,000 | $258.0K | 2024-05-22 |
| 2024-05-21 | P, purchase reported on Form 4 | 350,000 | $896.0K | 2024-05-22 |
| 2024-05-22 | P, purchase reported on Form 4 | 150,000 | $387.0K | 2024-05-22 |
| 2025-11-07 | P, purchase reported on Form 4 | 225,000 | $252.0K | 2025-11-12 |
| 2025-11-10 | P, purchase reported on Form 4 | 275,000 | $321.8K | 2025-11-12 |
| 2025-11-11 | P, purchase reported on Form 4 | 300,000 | $360.0K | 2025-11-12 |
| 2025-11-12 | P, purchase reported on Form 4 | 375,000 | $446.2K | 2025-11-12 |
| 2025-11-24 | P, purchase reported on Form 4 | 150,000 | $214.5K | 2025-11-26 |
| 2025-11-25 | P, purchase reported on Form 4 | 7,550,000 | $9.8M | 2025-11-26 |
Biolife Solutions INC (BLFS)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2023-05-19 | P, purchase reported on Form 4 | 50,000 | $1.1M | 2023-05-23 |
| 2023-05-22 | P, purchase reported on Form 4 | 24,973 | $545.9K | 2023-05-23 |
| 2023-08-09 | P, purchase reported on Form 4 | 58,465 | $771.7K | 2023-08-11 |
| 2025-10-15 | S, sale reported on Form 4 | 750,000 | $21.4M | 2025-10-17 |
GeneDx Holdings Corp. (WGS)
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
TSVT
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2024-03-21 | P, purchase reported on Form 4 | 300,000 | $1.5M | 2024-03-25 |
| 2024-03-22 | P, purchase reported on Form 4 | 147,377 | $754.6K | 2024-03-25 |
| 2024-03-25 | P, purchase reported on Form 4 | 330,000 | $1.7M | 2024-03-25 |
Counted from the Form 4 filings this reporting owner (SEC CIK 1534260) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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