Casdin Alexander W. 4

What Happened
Alexander W. Casdin, a director of Erasca, Inc. (ERAS), received an award of 29,888 derivative securities on June 26, 2026. The transaction is reported with a $0.00 transaction price (no cash paid at grant) and no immediate cash value was reported. This was a grant/award (not a sale or an exercised option).

Key Details

• Transaction date: 2026-06-26; filing date (Form 4): 2026-06-29. Filing appears timely under the Form 4 reporting window.
• Transaction code: A (award/grant or other acquisition of a derivative security). Reported price: $0.00.
• Number of derivative securities granted: 29,888. Total reported dollar amount at grant: $0.
• Shares owned after transaction: not disclosed in the provided data.
• Footnote: 100% of the options to purchase shares vest on June 26, 2027, subject to Casdin’s continuous service to the company on that date.

Context
This was an award of derivative securities (likely stock options or similar vesting award), not an exercise or sale. The award gives the right to acquire shares in the future if/when it vests; no shares were sold and no cash changed hands at grant. Such grants are common for board compensation and do not by themselves indicate insider buying or selling sentiment.