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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1761918	Erasca Inc.	ERAS	()	DE

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1583977	Cormorant Asset Management, Lp	200 Clarendon Street 52Nd Floor Boston MA 02116	No	No	No	No
1599214	Bihua Chen	C/O Cormorant Asset Management, Llc 200 Clarendon Street, 52Nd Floor Boston MA 02116	No	No	No	No
1618442	Cormorant Global Healthcare Master Fund, Lp	200 Clarendon Street, 52Nd Floor Boston MA 02116	No	No	No	No
1747677	Cormorant Private Healthcare Fund Ii, Lp	200 Clarendon Street, 52Nd Floor Boston MA 02116	No	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2022-12-13	307,692	$6.50	10,813,246	No	4	P	Indirect	See Footnotes

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See Footnotes

Reported Derivative Holdings

Sec. Name	Sec. Type	Price	Date	Expiration Date	Amount	Remaning Holdings	Nature of Ownership
Common Stock	Stock Option (right to buy)	$5.81		2031-04-11	166,666	166,666	Direct
Common Stock	Stock Option (right to buy)	$5.35	2023-06-22	2032-06-21	40,000	40,000	Direct

Expiration Date	Amount	Remaning Holdings	Nature of Ownership
2031-04-11	166,666	166,666	Direct
2032-06-21	40,000	40,000	Direct

Footnotes

Shares reported herein are held by Cormorant Global Healthcare Master Fund, LP (the "Master Fund"), Cormorant Private Healthcare Fund II, LP ("Fund II"), and a managed account (the "Account"). Cormorant Asset Management, LP ("Cormorant") serves as the investment manager of the Master Fund, Fund II, and the Account. Bihua Chen serves as manager of the general partner of Cormorant. Ms. Chen disclaims beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, and the filing of this Form 4 shall not be construed as an admission that Ms. Chen is the beneficial owner of any such shares for purposes of Section 16(a) of the Securities Exchange Act of 1934 or for any other purpose.
Represents (i) 2,986,402 shares of Common Stock held by the Master Fund, (ii) 7,716,444 shares of Common Stock held by Fund II, and (iii) 110,400 shares of Common Stock held by the Account.
Shares reported herein as purchased on December 9, 2022 were purchased by the Master Fund.
Stock option grant for 166,666 shares, 41,667 shares of which become exercisable on 3/16/2022 and 124,999 shares of which become exercisable thereafter in equal monthly installments through 3/16/2025.
Stock options granted to Bihua Chen, in her capacity as a director of the Issuer.