X0306 4 2022-06-02 0 0000095552 SUPERIOR INDUSTRIES INTERNATIONAL INC SUP 0001767199 Mill Road Capital III, L.P. 382 GREENWICH AVENUE SUITE ONE GREENWICH CT 06830 0 0 1 0 0001767178 Mill Road Capital III GP LLC 382 GREENWICH AVENUE SUITE ONE GREENWICH CT 06830 0 0 1 0 0001244666 LYNCH THOMAS E 382 GREENWICH AVENUE SUITE ONE GREENWICH CT 06830 0 0 1 0 Common Stock, $0.01 par value 2022-06-02 4 P 0 29 3.94 A 3583724 D The shares reported are directly held by Mill Road Capital III, L.P. (the "Fund"). Mill Road Capital III GP LLC (the "GP") is the sole general partner of the Fund and has sole authority to vote (or direct the vote of), and to dispose (or direct the disposal) of, these shares on behalf of the Fund. Mr. Lynch is a management committee director of the GP and has shared authority to vote (or direct the vote of), and to dispose (or direct the disposal) of, these shares on behalf of the GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any. /s/ Justin C. Jacobs, Management Committee Director of sole general partner on behalf of Mill Road Capital III, L.P. 2022-06-06 /s/ Justin C. Jacobs, Management Committee Director on behalf of Mill Road Capital III GP LLC 2022-06-06 /s/ Justin C. Jacobs on behalf of Thomas E. Lynch by power of attorney 2022-06-06