13D Filing: Oak Management Corp and U.S. Auto Parts Network Inc. (PRTS)

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SIGNATURES

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

Date: May 16, 2017

Entities:
Oak Investment Partners XI, Limited Partnership
Oak Associates XI, LLC
Oak Management Corporation
By: /s/
Edward F. Glassmeyer
Edward F. Glassmeyer, as General Partner or
Managing Member or as Attorney-in-fact for
the above-listed entities
Individuals:
Bandel L. Carano
Edward F. Glassmeyer
Fredric W. Harman
Ann H. Lamont
By: /s/ Edward F. Glassmeyer
Edward F. Glassmeyer, Individually and as
Attorney-in-fact for the above-listed
individuals

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