X0306 4 2022-06-08 0 0001389002 MARIN SOFTWARE INC MRIN 0001570728 Hutchison Donald P. C/O MARIN SOFTWARE INCORPORATED 123 MISSION ST, 27TH FLOOR SAN FRANCISCO CA 94105 1 0 0 0 Common Stock 2022-06-08 4 M 0 69847 0.00 A 69847 D Restricted Stock Unit 2022-06-08 4 M 0 27972 0.00 D Common Stock 27972 27972 D Restricted Stock Unit 2022-06-08 4 M 0 41875 0.00 D Common Stock 41875 0 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. The RSUs shall vest 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, provided that the Reporting Person continues to serve on the Issuer's Board of Directors on each vesting date and provided further that, in the event of certain corporate transactions, all of the shares subject to the RSUs shall immediately vest in full as of the effectiveness of such transaction. 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 June 8, 2022. The RSUs have no expiration date. /s/ Donald P. Hutchison by Robert Bertz, Attorney-in-Fact 2022-06-10