X0306 4 2021-05-05 0001494259 CarGurus, Inc. CARG 0001719138 Steinert Langley 2 CANAL PARK, 4TH FLOOR CAMBRIDGE MA 02141 1 1 1 Executive Chairman Class A Common Stock 2021-05-05 4 S 0 83 25.01 D 1269881 D Class A Common Stock 2021-05-05 4 S 0 9 25.01 D 119991 I See Footnote This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by The Langley Steinert Irrevocable Family Trust dated June 21, 2004. These shares are owned directly by The Langley Steinert Irrevocable Family Trust dated June 21, 2004, of which the Reporting Person's children are the beneficiaries. The Reporting Person 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 2021-05-07