X0609 4 2026-10-16 0 0001880613 Direct Digital Holdings, Inc. DRCT 0001493839 Diaz Diana P false 1177 WEST LOOP SOUTH, SUITE 1310 HOUSTON TX 77027 0 1 0 0 CFO 0 Class A Common Stock, par value $0.001 per share 2026-10-16 4 M 0 28 A 187 D Class A Common Stock, par value $0.001 per share 2026-10-16 4 F 0 9 0.32 D 178 D Restricted Stock Units 2026-10-16 4 M 0 28 0 D Class A Common Stock, par value $0.001 per share 28 0 D Each restricted stock unit represents a contingent right to one share of DRCT's Class A Common Stock, par value $0.001 per share, upon settlement. Represents shares withheld to satisfy tax liabilities associated with the reported vesting of restricted stock units for 28 shares. On October 16, 2023, the reporting person was granted 84 restricted stock units, vesting in three annual installments beginning on the first anniversary of the grant date. 33% of the restricted stock units vested on October 16, 2024, an additional 33% of the restricted stock units vested on October 16, 2025, and the remaining balance of 34% of the restricted stock units vested on October 16, 2026. Vesting will be accelerated upon certain termination of employment events and upon a "Change in Control" (as defined in the Direct Digital Holdings, Inc. 2022 Omnibus Incentive Plan). This grant was previously reported as covering 18,650 restricted stock units, but was adjusted to reflect the Reverse Stock Splits. /s/ Mark Walker, attorney-in-fact for Diana P. Diaz 2026-10-19