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SEC Filings

HENN MATTHEW R. filed this Form 3 on 02/11/2019
Entire Document
                                                                     Exhibit 24

                                  POWER OF ATTORNEY

     KNOW ALL BY THESE PRESENTS, as of this 6th day of February, 2019, that the
undersigned hereby constitutes and appoints the Chief Executive Officer of Seres
Therapeutics, Inc. (the "Company"), who is currently Eric D. Shaff, and the
Chief Legal Officer of the Company who is currently Thomas J. DesRosier, or any
or each of them signing singly, and with full power of substitution, the
undersigned's true and lawful attorney-in-fact to:

     (1) prepare, execute in the undersigned's name and on the undersigned's
         behalf, and submit to the U.S. Securities and Exchange Commission (the
         "SEC") a Form ID, including amendments thereto, and any other documents
         necessary or appropriate to obtain codes and passwords enabling the
         undersigned to make electronic filings with the SEC of reports required
         by Section 16(a) of the Securities Exchange Act of 1934 (the "Exchange
         Act") or any rule or regulation of the SEC;

     (2) execute for and on behalf of the undersigned, in the undersigned's
         capacity as an officer and/or director of the Company, Forms 3, 4, and
         5 in accordance with Section 16(a) of the Exchange Act and the rules

     (3) do and perform any and all acts for and on behalf of the undersigned
         which may be necessary or desirable
 to complete and execute any such
         Form 3, 4, or 5, complete and execute any amendment or amendments
         thereto, and timely file such form with the SEC and any stock exchange
         or similar authority; and

     (4) take any other action of any type whatsoever in connection with the
         foregoing which, in the opinion of such attorney-in-fact, may be of
         benefit to, in the best interest of, or legally required by, the
         undersigned, it being understood that the documents executed by such
         attorney-in-fact on behalf of the undersigned pursuant to this Power of
         Attorney shall be in such form and shall contain such terms and
         conditions as such attorney-in-fact may approve in such attorney-in-
         fact's discretion.

     The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution and/or
revocation, hereby ratifying and confirming all that such attorney-in-fact, or
such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to
be done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Exchange Act.

     This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of the date first written above.

/s/ Matthew Henn, Ph.D.

Matthew Henn, Ph.D.
Printed Name


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