X0306 4 2019-08-12 1 0001666071 Cardlytics, Inc. CDLX 0001419148 Canaan VIII LP C/O CANAAN PARTNERS 285 RIVERSIDE AVENUE, SUITE 250 WESTPORT CT 06880 1 0 0 0 0001552200 Canaan Partners VIII LLC C/O CANAAN PARTNERS 285 RIVERSIDE AVENUE, SUITE 250 WESTPORT CT 06880 1 0 0 0 Common Stock 2019-08-12 4 S 0 84185 31.7986 D 103498 D Common Stock 2019-08-12 4 S 0 2600 33.105 D 100898 D Common Stock 2019-08-12 4 S 0 100898 31.9986 D 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.75 - $32.185, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The shares are held directly by Canaan VIII L.P. (the "Canaan Fund"). Canaan Partners VIII LLC ("Canaan VIII") is the sole general partner of the Canaan Fund, and may be deemed to have sole voting, investment and dispositive power with respect to the shares held by the Canaan Fund. John Balen is a manager and member of Canaan VIII. Investment and voting decisions with respect to the shares held by the Canaan Fund are made by the managers of Canaan VIII, collectively. Canaan VIII disclaims Section 16 beneficial ownership of the shares held by the Canaan Fund, except to the extent, if any, of its pecuniary interest therein. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.00 - $33.21, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.75 - $32.50, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Exhibit 24 - Power of Attorney (incorporated by reference to the Power of Attorney filed as Exhibit 24 to the Form 4 filed by the Reporting Persons on August 9, 2018) Canaan VIII L.P., By: Canaan Partners VIII LLC, its general partner, By: /s/ Nancy Levenson, Attorney-in-Fact 2019-08-13 Canaan Partners VIII LLC, By: /s/ Nancy Levenson, Attorney-in-Fact 2019-08-13