X0306 4 2021-08-20 0001494259 CarGurus, Inc. CARG 0001719138 Steinert Langley 2 CANAL PARK, 4TH FLOOR CAMBRIDGE MA 02141 1 1 1 Executive Chairman Class A Common Stock 2021-08-20 4 S 0 13994 26.84 D 1441482 D Class A Common Stock 2021-08-20 4 S 0 1555 26.84 D 139567 I See Footnote Class A Common Stock 2021-08-23 4 S 0 13994 27.47 D 1427488 D Class A Common Stock 2021-08-23 4 S 0 1555 27.47 D 138012 I See Footnote This sale was 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 $26.46 to $27.20 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. 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.03 to $27.65 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. /s/ Kathleen Patton, as attorney-in-fact 2021-08-24