Casdin Partners GP, LLC
CIK 1534260 · last filed 2026-05-21
Casdin Partners GP, LLC is a corporate insider who has filed 10 SEC Form 4 insider transactions across 3 companies since 2020. The most recent filing shows the insider sold $112.5M of BLFS on May 21, 2026. Across all open-market trades the lifetime net is +$2.3M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $360.2M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$360.15M
3
10
$2.28M
Holdings By Company
Recent Filings
10 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-21 | BLFS | Sell (S) | −4,800,000 | -$112.50M | EDGAR |
| 2026-05-20 | WGSWW | Buy (P) | +2,000,000 | $85.84M | EDGAR |
| 2025-06-12 | BLFS | Sell (S) | −4,000,000 | -$95.20M | EDGAR |
| 2025-03-04 | LAB | Mixed | +43,912,566 | $46.77M | EDGAR |
| 2025-03-04 | LAB | — | — | $0 | EDGAR |
| 2024-06-05 | WGSWW | Buy (P) | +650,000 | $13.79M | EDGAR |
| 2024-01-09 | LAB | Grant (A) | +111,925,952 | $0 | EDGAR |
| 2023-05-23 | BLFS | Buy (P) | +299,892 | $6.69M | EDGAR |
| 2022-04-06 | LAB | Grant (A) | — | $0 | EDGAR |
| 2020-07-02 | BLFS | Buy (P) | +3,962,332 | $57.45M | EDGAR |