Erasca, Inc. — Director's Dealing 2026

Jan 30, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Erasca, Inc. (ERAS)
CIK: 0001761918
Period of Report: 2025-12-15

Reporting Person: Chacko David M. (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-15	Common Stock	J	17793	$1.1943	Acquired	279980	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-29	Stock option (right to buy)	$10.31	A	640000	Acquired	2036-01-29	Common Stock (640000)	Direct

Footnotes

F1: Shares purchased under the Company's 2021 Employee Stock Purchase Plan

F2: The purchase price was calculated in accordance with the issuer's 2021 Employee Stock Purchase Plan.

F3: 1/48th of the shares subject to the option vest monthly on the 29th day of each month (or the last day of February), starting in February 2026, subject to the Reporting Person's continuous service to the issuer on each such vesting date.