UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
 


SCHEDULE 13G
 

 
Under the Securities Exchange Act of 1934

(Amendment No. __)*
 
 
 

Surface Oncology, Inc.
(Name of Issuer)
 
 
 
Common Stock, $0.0001 par value per share
(Title of Class of Securities)
 
 
 
86877M209
(CUSIP Number)
 
 
 
December 31, 2018
(Date of Event Which Requires Filing of this Statement)
 
 
 
 
 
 
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

    Rule 13d-1(b)
    Rule 13d-1(c)
    Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 
CUSIP No.  86877M209
13G
Page 2 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
New Enterprise Associates 14, L.P.
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
Cayman Islands exempted limited partnership
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
PN
 
 
 
 
 
 

CUSIP No.  86877M209
13G
Page 3 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
NEA Partners 14, L.P.
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
Cayman Islands exempted limited partnership
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
PN
 
 
 
 

CUSIP No.  86877M209
13G
Page 4 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
NEA 14 GP, LTD
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
Cayman Islands exempted company
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
CO
 
 
 
 

CUSIP No.  86877M209
13G
Page 5 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
Peter J. Barris
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
United States
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
IN
 
 
 
 

CUSIP No.  86877M209
13G
Page 6 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
Forest Baskett
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
United States
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
IN
 
 
 
 

CUSIP No.  86877M209
13G
Page 7 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
Anthony A. Florence, Jr.
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
United States
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
IN
 
 
 
 

CUSIP No.  86877M209
13G
Page 8 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
Patrick J. Kerins
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
United States citizen
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
IN
 
 
 
 

CUSIP No.  86877M209
13G
Page 9 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
David M. Mott
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
United States
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
IN
 
 
 
 

CUSIP No.  86877M209
13G
Page 10 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
Scott D. Sandell
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
United States
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
IN
 
 
 
 

CUSIP No.  86877M209
13G
Page 11 of 20
 
1
NAMES OF REPORTING PERSONS
 
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
 
Peter W. Sonsini
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
   
(a)
   
(b)
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
United States
 
 
 
 
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
 
 
0 shares
 
 
 
 
6
SHARED VOTING POWER
 
 
3,312,877 shares
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
0 shares
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
3,312,877 shares
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
 
3,312,877 shares
 
 
 
 
10
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
 
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
 
 
12.0%
 
 
 
 
12
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
 
 
IN
 
 
 
 

CUSIP No.  86877M209
13G
Page 12 of 20
 
 
 
 
Item 1(a). Name of Issuer:

Surface Oncology, Inc. (the "Issuer").
 
 
Item 1(b). Address of Issuer's Principal Executive Offices:

50 Hampshire Street, 8th Floor, Cambridge, MA 02139
 

Item 2(a). Names of Persons Filing:

This statement is being filed by New Enterprise Associates 14, L.P. ("NEA 14"); NEA Partners 14, L.P. ("NEA Partners 14"), which is the sole general partner of NEA 14; NEA 14 GP, LTD ("NEA 14 GP"), which is the sole general partner of NEA Partners 14; and Peter J. Barris ("Barris"), Forest Baskett ("Baskett"), Anthony A. Florence, Jr. ("Florence"), Patrick J. Kerins ("Kerins"), David M. Mott ("Mott"), Scott D. Sandell ("Sandell") and Peter W. Sonsini ("Sonsini") (collectively, the "Directors").  The Directors are the individual directors of NEA 14 GP.  NEA 14, NEA Partners 14, NEA 14 GP and the Directors are sometimes referred to collectively herein as the "Reporting Persons".
 

Item 2(b). Address of Principal Business Office or, if none, Residence:

The address of the principal business office of NEA 14, NEA Partners 14 and NEA 14 GP is New Enterprise Associates, 1954 Greenspring Drive, Suite 600, Timonium, MD 21093.  The address of the principal business office of Baskett, Sandell and Sonsini is New Enterprise Associates, 2855 Sand Hill Road, Menlo Park, California 94025.  The address of the principal business office of Barris, Kerins and Mott is New Enterprise Associates, 5425 Wisconsin Avenue, Suite 800, Chevy Chase, MD 20815. The address of the principal business office of Florence is New Enterprise Associates, 104 5th Avenue, 19th Floor, New York, NY 10001.
 

Item 2(c). Citizenship:

Each of NEA 14 and NEA Partners 14 is a Cayman Islands exempted limited partnership.  NEA 14 GP is a Cayman Islands exempted company.  Each of the Directors is a United States citizen.
 

Item 2(d). Title of Class of Securities:

Common stock, $0.0001 par value ("Common Stock").
 
 
Item 2(e). CUSIP Number:

86877M209
 

Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
 
Not applicable.
 
 

CUSIP No.  86877M209
13G
Page 13 of 20
 
 

 
Item 4. Ownership.

(a)
Amount Beneficially Owned: NEA 14 is the record owner of 3,312,877 shares of Common Stock as of December 31, 2018 (the "Shares").  As the sole general partner of NEA 14, NEA Partners 14 may be deemed to own beneficially the Shares.  As the sole general partner of NEA Partners 14, NEA 14 GP likewise may be deemed to own beneficially the Shares.  As the individual Directors of NEA 14 GP, each of the Directors also may be deemed to own beneficially the Shares.
 
(b)
Percent of Class:  See Line 11 of cover sheets.  The percentages set forth on the cover sheet for each Reporting Person are calculated based on 27,681,724 shares of Common Stock reported by the Issuer to be outstanding as of November 8, 2018 on the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 13, 2018.

(c)
Number of shares as to which such person has:

(i)
sole power to vote or to direct the vote:    See Line 5 of cover sheets.

(ii)
shared power to vote or to direct the vote:  See Line 6 of cover sheets.

  (iii)
sole power to dispose or to direct the disposition of:  See Line 7 of cover sheets.

  (iv)
shared power to dispose or to direct the disposition of:  See Line 8 of cover sheets.
 
Each Reporting Person disclaims beneficial ownership of such Securities except for the shares, if any, such Reporting Person holds of record.
 

Item 5. Ownership of Five Percent or Less of a Class.

Not applicable.
 

Item 6. Ownership of More Than Five Percent on Behalf of Another Person.

Not applicable.
 
 


CUSIP No.  86877M209
13G
Page 14 of 20
 
 
 
 
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

Not applicable.
 

Item 8. Identification and Classification of Members of the Group.

Not applicable.  The Reporting Persons expressly disclaim membership in a "group" as used in Rule 13d-5(b).
 

Item 9. Notice of Dissolution of Group.

Not applicable.
 
 
Item 10.
Certification.
 
Not applicable.  This Schedule 13G is not filed pursuant to Rule 13d‑1(b) or Rule 13d–1(c).
 
 
 
Material to be Filed as Exhibits.

Exhibit 1 – Agreement regarding filing of joint Schedule 13G.

Exhibit 2 – Power of Attorney regarding filings under the Securities Exchange Act of 1934, as amended.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

CUSIP No.  86877M209
13G
Page 15 of 20
 
 
SIGNATURE

After reasonable inquiry and to the best of its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Date:
February 13, 2019

 
 
NEW ENTERPRISE ASSOCIATES 14, L.P.

By:
NEA PARTNERS 14, L.P.
General Partner

By:
NEA 14 GP, LTD
General Partner

By:                                *                               
Peter J. Barris
Director


NEA PARTNERS 14, L.P.

By:
NEA 14 GP, LTD
General Partner

By:                                 *                               
                Peter J. Barris
 Director


NEA 14 GP, LTD

By:                                 *                               
                Peter J. Barris
 Director

 
 

                  *                                                    
Peter J. Barris


                  *                                                    
Forest Baskett
 

                  *                                                    
Anthony A. Florence, Jr.




CUSIP No.  86877M209
13G
Page 16 of 20
 
 
 
 

                  *                                                    
Patrick J. Kerins


                  *                                                    
David M. Mott


                  *                                                    
Scott D. Sandell


                  *                                                    
Peter W. Sonsini

 




*By: /s/ Sasha O. Keough                         
         Sasha O. Keough
         As attorney-in-fact

This Schedule 13G was executed by Sasha O. Keough on behalf of the individuals listed above pursuant to a Power of Attorney, a copy of which is attached as Exhibit 2.
 
 
 
 
 
 
 
 
 
 
 
 
 

CUSIP No.  86877M209
13G
Page 17 of 20
 
EXHIBIT 1


AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of shares of stock of Surface Oncology, Inc.
 
EXECUTED this 13th day of February, 2019.

 
NEW ENTERPRISE ASSOCIATES 14, L.P.

By:
NEA PARTNERS 14, L.P.
General Partner

By:
NEA 14 GP, LTD
General Partner

By:                               *                               
Peter J. Barris
Director


NEA PARTNERS 14, L.P.

By:
NEA 14 GP, LTD
General Partner

By:                                 *                               
                Peter J. Barris
 Director


NEA 14 GP, LTD

By:                                 *                               
                Peter J. Barris
 Director

 

 

                  *                                                    
Peter J. Barris


                  *                                                    
Forest Baskett


 
 

CUSIP No.  86877M209
13G
Page 18 of 20
 
 
 

                  *                                                    
Anthony A. Florence, Jr.


                  *                                                    
Patrick J. Kerins


                  *                                                    
David M. Mott


                  *                                                    
Scott D. Sandell


                  *                                                    
Peter W. Sonsini





*By: /s/ Sasha O. Keough                         
         Sasha O. Keough
         As attorney-in-fact

This Agreement was executed by Sasha O. Keough on behalf of the individuals listed above pursuant to a Power of Attorney, a copy of which is attached as Exhibit 2.
 
 
 
 
 
 
 
 
 
 
 
 

CUSIP No.  86877M209
13G
Page 19 of 20
 
EXHIBIT 2


POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Louis S. Citron, Timothy Schaller, Sasha Keough and Stephanie Brecher, and each of them, with full power to act without the others, his or her true and lawful attorney-in-fact, with full power of substitution, to sign any and all instruments, certificates and documents that may be necessary, desirable or appropriate to be executed on behalf of himself as an individual or in his or her capacity as a direct or indirect general partner, director, officer or manager of any partnership, corporation or limited liability company, pursuant to section 13 or 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and any and all regulations promulgated thereunder, and to file the same, with all exhibits thereto, and any other documents in connection therewith, with the Securities and Exchange Commission, and with any other entity when and if such is mandated by the Exchange Act or by the Financial Industry Regulatory Authority, granting unto said attorney-in-fact full power and authority to do and perform each and every act and thing necessary, desirable or appropriate, fully to all intents and purposes as he or she might or could do in person, thereby ratifying and confirming all that said attorney-in-fact, or his or her substitutes, may lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 13th day of March, 2017.


/s/ M. James Barrett                    
M. James Barrett

/s/ Peter J. Barris                         
Peter J. Barris

/s/ Forest Baskett                        
Forest Baskett

/s/ Ali Behbahani                        
Ali Behbahani

/s/ Colin Bryant                           
Colin Bryant

/s/ Carmen Chang                       
Carmen Chang

/s/ Anthony A. Florence, Jr.     
Anthony A. Florence, Jr.

/s/ Carol G. Gallagher                  
Carol G. Gallagher
 
/s/ Dayna Grayson                      
Dayna Grayson

/s/ Patrick J. Kerins                     
Patrick J. Kerins
 
 
 
 
 
 

CUSIP No.  86877M209
13G
Page 20 of 20
 
 
 
 
 
/s/ P. Justin Klein                        
P. Justin Klein

/s/ Vanessa Larco                       
Vanessa Larco

/s/ Joshua Makower                   
Joshua Makower

/s/ Mohamad H. Makhzoumi    
Mohamad H. Makhzoumi

/s/ Edward T. Mathers               
Edward T. Mathers

/s/ David M. Mott                       
David M. Mott

/s/ Sara M. Nayeem                    
Sara M. Nayeem

/s/ Jason R. Nunn                       
Jason R. Nunn

/s/ Gregory Papadopoulos        
Gregory Papadopoulos

/s/ Chetan Puttagunta                
Chetan Puttagunta

/s/ Jon Sakoda                             
Jon Sakoda

/s/ Scott D. Sandell                     
Scott D. Sandell

/s/ A. Brooke Seawell                 
A. Brooke Seawell

/s/ Peter W. Sonsini                   
Peter W. Sonsini

/s/ Melissa Taunton                   
Melissa Taunton

/s/ Frank M. Torti                       
Frank M. Torti

/s/ Ravi Viswanathan                 
Ravi Viswanathan

/s/ Paul E. Walker                       
Paul E. Walker

/s/ Rick Yang                               
Rick Yang