CORRESP

Morgan Stanley & Co. LLC

1585 Broadway

New York, New York 10036

BofA Securities, Inc.

One Bryant Park

New York, New York 10036

Cowen and Company, LLC

599 Lexington Avenue, 20th Floor

New York, New York 10022

June 17, 2019

VIA EDGAR

U.S. Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N.E.

Washington, D.C. 20549

Attn:

    

James Giugliano

    

Craig Arakawa

    

Michael Killoy

    

Brigitte Lippmann

Re:      Personalis, Inc.
     Registration Statement on Form S-1, as amended (File No. 333-231703)
     Request for Acceleration of Effective Date

Ladies and Gentlemen:

In accordance with Rule 461 under the Securities Act of 1933, as amended (the “Act”), we, as representatives of the several underwriters, hereby join in the request of Personalis, Inc. (the “Company”) for acceleration of the effective date of the above-named Registration Statement so that it becomes effective at 4:00 PM, Eastern Time, on June 19, 2019, or as soon thereafter as practicable, or at such other time as the Company or its outside counsel, Cooley LLP, request by telephone that such Registration Statement be declared effective.

Pursuant to Rule 460 under the Act, we, as representatives of the several underwriters, wish to advise you that we have carried out the following distribution of the Company’s preliminary prospectus dated June 7, 2019:

 

  (i)

Dates of distribution: June 7, 2019 through the date hereof

 

  (ii)

Number of prospective underwriters to which the preliminary prospectus was furnished: 4

 

  (iii)

Number of prospectuses furnished to investors: approximately 2,200

 

  (iv)

Number of prospectuses distributed to others, including the Company, the Company’s counsel, independent accountants, and underwriters’ counsel: approximately 50

We, the undersigned, as representatives of the several underwriters, have complied and will comply, and we have been informed by the participating underwriters that they have complied and will comply, with the requirements of Rule 15c2-8 under the Securities Exchange Act of 1934, as amended.

[Signature page follows]


Very truly yours,

MORGAN STANLEY & CO. LLC

BOFA SECURITIES, INC.

COWEN AND COMPANY, LLC

 

Acting severally on behalf of themselves and the

several Underwriters

  MORGAN STANLEY & CO. LLC
By:  

/s/ Chris Rigoli

Name:   Chris Rigoli
Title:   Vice President

 

  BOFA SECURITIES, INC.
By:  

/s/ Michele A.H. Allong

Name:   Michele A.H. Allong
Title:   Authorized Signatory

 

  COWEN AND COMPANY, LLC
By:  

/s/ Bill Follis

Name:   Bill Follis
Title:   Managing Director

[Signature Page to Acceleration Request]