X0407 4 2023-05-25 0 0001389002 MARIN SOFTWARE INC MRIN 0001570728 Hutchison Donald P. C/O MARIN SOFTWARE INCORPORATED 845 MARKET STREET, SUITE 450 SAN FRANCISCO CA 94103 1 0 0 0 0 Common Stock 2023-05-25 4 M 0 66040 0.00 A 135887 D Restricted Stock Unit 2023-05-25 4 M 0 27972 0.00 D Common Stock 27972 0 D Restricted Stock Unit 2023-05-25 4 M 0 38068 0.00 D Common Stock 38068 0 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. The RSUs vested as to one-third of the total number of shares on the date of the Issuer's annual meeting of stockholders held in each of 2021, 2022 and 2023. The RSUs have no expiration date. The RSUs vested as to 100% of the total number of shares on the date of the Issuer's annual meeting of stockholders held on May 25, 2023. The RSUs have no expiration date. /s/ Donald P. Hutchison by Robert Bertz, Attorney-in-Fact 2023-05-26