X0306 4 2018-02-28 0 0001494259 CarGurus, Inc. CARG 0001719138 Steinert Langley 2 CANAL PARK, 4TH FLOOR CAMBRIDGE MA 02141 1 1 1 0 CEO, President and Chairman Class A Common Stock 2018-02-28 4 A 0 58333 0.00 A 9109534 D Class A Common Stock 1042768 I See Footnote Represents shares issuable upon settlement of restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock. Subject to the reporting person's continuous service as an employee of the Issuer, 6.25% of the RSUs will vest on April 1, 2018 and 6.25% of the RSUs will vest on the last day of each three-month period thereafter until January 1, 2022. Such vesting may be accelerated in connection with a Change of Control (as defined in the Issuer's Omnibus Incentive Compensation Plan). These shares are owned directly by The Langley Steinert Irrevocable Family Trust dated June 21, 2004, of which Langley Steinert's children are the beneficiaries. Langley Steinert may be deemed to have indirect ownership over such shares, but expressly disclaims beneficial ownership of such shares. /s/ Kathleen Patton, as attorney-in-fact 2018-03-02