Casdin Alexander W. insider trades
Casdin Alexander W. has filed 15 Form 4s with the SEC that we hold, for Erasca, Inc. (ERAS) (Director) and SIEN (Director). Across all of them we count 4 purchases worth $384.0K and 0 sales worth $0 reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a purchase of 80,000 shares of Erasca, Inc. worth $181.6K, dated 2024-05-21. The first filing on our record is dated 2021-07-20 and the latest 2026-06-29.
Erasca, Inc. (ERAS)
| Trade date | Code | Shares | Value as filed | Filed | Source |
|---|---|---|---|---|---|
| 2022-12-15 | P, purchase reported on Form 4 | 20,000 | $97.4K | 2022-12-15 | SEC |
| 2023-04-10 | P, purchase reported on Form 4 | 20,000 | $55.2K | 2023-04-11 | SEC |
| 2023-12-04 | P, purchase reported on Form 4 | 30,000 | $49.8K | 2023-12-04 | SEC |
| 2024-05-21 | P, purchase reported on Form 4 | 80,000 | $181.6K | 2024-05-22 | SEC |
SIEN
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
Counted from the Form 4 filings this reporting owner (SEC CIK 1455228) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.

