X0306 4 2019-06-06 0 0001509190 ARATANA THERAPEUTICS, INC. PETX 0001379218 Vander Vort John C/O ARATANA THERAPEUTICS, INC. 11400 TOMAHAWK CREEK PARKWAY, SUITE 340 LEAWOOD KS 66211 1 0 0 0 Common Stock 2019-06-06 4 A 0 4500 0.00 A 43000 D Stock Option (Right to Buy) 4.80 2019-06-06 4 A 0 7500 0.00 A 2029-06-05 Common Stock 7500 7500 D Vests on the earlier of (i) the first anniversary of the date of grant and (ii) the day immediately preceding the date of the Issuer's next annual meeting of stockholders following the date of grant, subject to continued service as a member of the Board of Directors of the Issuer through such vesting date. The transactions reported in this Form 4 consist of annual equity awards issued pursuant to the Issuer's Non-Employee Director Compensation Program, filed as Exhibit 10.2 to the Issuer's Form 10-Q dated August 5, 2016. /s/ John C. Ayres, Attorney-in-Fact for John Vander Vort 2019-06-07