13D Filing: Engaged Capital and Aratana Therapeutics Inc. (PETX)

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SIGNATURES

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

Dated: April 5, 2018

Engaged Capital Flagship Master Fund, LP
By: Engaged Capital, LLC
General Partner
By: /s/ Glenn W. Welling
Name: Glenn W. Welling
Title: Founder and Chief Investment Officer
Engaged Capital Flagship Fund, LP
By: Engaged Capital, LLC
General Partner
By: /s/ Glenn W. Welling
Name: Glenn W. Welling
Title: Founder and Chief Investment Officer
Engaged Capital Flagship Fund, Ltd.
By: /s/ Glenn W. Welling
Name: Glenn W. Welling
Title: Director
Engaged Capital, LLC
By: /s/ Glenn W. Welling
Name: Glenn W. Welling
Title: Founder and Chief Investment Officer
Engaged Capital Holdings, LLC
By: /s/ Glenn W. Welling
Name: Glenn W. Welling
Title: Sole Member
/s/ Glenn W. Welling

Glenn W. Welling

Individually and as attorney-in-fact for Craig A. Barbarosh, Eric
J. Ende and Lowell W. Robinson

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