X0306 4 2018-04-10 0 0001494259 CarGurus, Inc. CARG 0001718790 Zales Samuel 2 CANAL PARK, 4TH FLOOR CAMBRIDGE MA 02141 0 1 0 0 Chief Operating Officer Class A Common Stock 2018-04-10 4 M 0 15000 0.16 A 65000 D Class A Common Stock 2018-04-10 4 S 0 15000 38.29 D 50000 D Class A Common Stock 2018-04-11 4 M 0 15000 0.16 A 65000 D Class A Common Stock 2018-04-11 4 S 0 15000 34.90 D 50000 D Class A Common Stock 2018-04-11 4 F 0 988 38.06 D 49012 D Employee Stock Option (Right to Buy) 0.16 2018-04-10 4 M 0 15000 0.00 D 2024-12-10 Class A Common Stock 15000 242782 D Employee Stock Option (Right to Buy) 0.16 2018-04-11 4 M 0 15000 0.00 D 2024-12-10 Class A Common Stock 15000 227782 D The stock option exercise reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $37.84 to $38.75 per share, inclusive. Information regarding the number of shares sold at each separate price will be made available from the Reporting Person upon request by the staff of the Securities and Exchange Commission, the Issuer or any security holder of the Issuer. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.15 to $36.45 per share, inclusive. Information regarding the number of shares sold at each separate price will be made available from the Reporting Person upon request by the staff of the Securities and Exchange Commission, the Issuer or any security holder of the Issuer. Shares withheld for payment of tax liability upon vesting of restricted stock units. 16,566 shares of Class A common stock subject to the option will vest and become exercisable (or have vested and became exercisable, as applicable) on each of November 3, 2017, May 3, 2018, August 3, 2018, and November 3, 2018 and 16,568 shares of Class A common stock subject to the option vested and became exercisable on February 3, 2018. /s/ Kathleen Patton, attorney-in-fact 2018-04-12