144 0001896664 XXXXXXXX LIVE 0001880613 Direct Digital Holdings, Inc. 001-41261 1177 West Loop South Suite 1310 Houston TX 77027 832-402-1051 Mark Walker Officer Common APEX CLEARING

350 N ST. PAUL ST SUITE 300 DALLAS TX 75201

173185 157598.00 17318554 03/11/2025 Nasdaq Common 12/06/2023 Restricted Unit Vesting and Unit Conversion Direct Digital Holdings, Inc. N 173185 12/06/2023 NA Y *173,185 shares acquired through AJN Energy & Transport Ventures, LLC 03/11/2025 12/11/2024 /s/ Mark Walker