X0206 3 2019-02-20 1 0000855612 ZIX CORP ZIXI 0001767764 Van Buren Brandon C/O TRUE WIND CAPITAL, FOUR EMBARCADERO CENTER, SUITE 2350 SAN FRANCISCO CA 94111 1 0 0 0 Mr. Van Buren, an employee of True Wind Capital and/or one of its affiliates, is a member of the board of directors of the Issuer. Certain affiliates of True Wind Capital have filed a separate Form 3 reporting securities of the Issuer that they may be deemed to beneficially own. Mr. Van Buren disclaims beneficial ownership of any securities of the Issuer that may be deemed to be beneficially owned by affiliates of True Wind Capital. By: /s/ Brandon Van Buren 2019-02-22