Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Novartis Institutes for BioMedical Research, Inc.
   2. Issuer Name and Ticker or Trading Symbol
Surface Oncology, Inc. [SURF] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
250 MASSACHUSETTS AVENUE		 3. Date of Earliest Transaction (Month/Day/Year)
04/23/2018
(Street)

CAMBRIDGE, MA 02139		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 04/23/2018   C   2,272,726 A (1) 2,272,726 D (3)  
Common Stock 04/23/2018   C   909,090 A (2) 3,181,816 D (3)  
Common Stock 04/23/2018   P   766,666 A $ 15 3,948,482 D (3)  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series A Preferred Stock (1) 04/23/2018   C     1,571,429   (1)   (4) Common Stock 2,272,726 $ 0 0 D (3)  
Series A-1 Preferred Stock (2) 04/23/2018   C     5,214,286   (2)   (4) Common Stock 909,090 $ 0 0 D (3)  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Novartis Institutes for BioMedical Research, Inc.
250 MASSACHUSETTS AVENUE
CAMBRIDGE, MA 02139		     X    
NOVARTIS AG
LICHTSTRASSE 35
BASEL, V8 CH 4056		     X    

Signatures

 NOVARTIS INSTITUTES FOR BIOMEDICAL RESEARCH, INC., /s/ Scott A. Brown, By: VP, General Counsel   04/23/2018
**Signature of Reporting Person Date
 NOVARTIS AG, /s/ Christian Rehm, By: Authorized Signatory   04/23/2018
**Signature of Reporting Person Date
 /s/ Katja Roth Pellanda, By: Authorized Signatory   04/23/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The 1,571,429 shares of Series A Preferred Stock held by the Reporting Person automatically converted upon the closing of the Issuer's initial public offering into 2,272,726 shares of the Issuer's Common Stock without payment or further consideration.
(2) The 5,214,286 shares of Series A-1 Preferred Stock held by the Reporting Person automatically converted upon the closing of the Issuer's initial public offering into 909,090 shares of the Issuer's Common Stock without payment or further consideration.
(3) The shares are held directly by Novartis Institutes for BioMedical Research, Inc. ("NIBRI"). NIBRI is an indirect wholly-owned subsidiary of, and controlled by, Novartis AG.
(4) Not applicable.

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