Jonathan E. Lim - 29 Jan 2026 Form 4 Insider Report for Erasca, Inc. (ERAS)

Role: Chairman & CEO, Director, 10%+ Owner
Signature: /s/ Ebun Garner, Attorney-in-fact
Issuer symbol: ERAS
Transactions as of: 29 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 30 Jan 2026, 09:05:03 UTC
Previous filing: 24 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Lim Jonathan E	Chairman & CEO, Director, 10%+ Owner	C/O ERASCA, INC., 3115 MERRYFIELD ROW, SUITE 300, SAN DIEGO	/s/ Ebun Garner, Attorney-in-fact	30 Jan 2026	0001283290

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ERAS	Stock option (right to buy)	Award	$0	+2,000,000		$0.000000	2,000,000	29 Jan 2026	Common Stock	2,000,000	$10.31	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.