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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1718108	Surface Oncology Inc.	SURF	()	DE

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1587114	Ecor1 Capital, Llc	357 Tehama Street #3 San Francisco CA 94103		No	No	Yes	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	Disposition	2020-09-01	332,780	$7.14	4,701,081	No	4	S	Indirect	See note 1

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See note 1

Footnotes

The Filers are EcoR1 Capital, LLC (EcoR1), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. (Qualified). EcoR1 is the general partner and investment adviser of private funds, including Qualified (collectively, the Funds). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this report for itself, Mr. Nodelman and Qualified. The Filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 indirectly beneficially owns the securities reported herein as the investment adviser to the Funds, and Mr. Nodelman indirectly beneficially owns them as the control person of EcoR1. The Filers disclaim beneficial ownership of the securities except to the extent of their pecuniary interest therein.
Qualified sold 281,132 shares of the securities sold in the transaction and holds 3,981,674 shares of such securities after the transaction.