X0306 4 2022-03-14 0 0001828791 Viant Technology Inc. DSP 0001284309 MADDEN LARRY C/O VIANT TECHNOLOGY INC. 2722 MICHELSON DRIVE, SUITE 100 IRVINE CA 92612 0 1 0 0 Chief Financial Officer Class A Common Stock 2022-03-14 4 S 0 21628 6.08 D 377663 D Class A Common Stock 2022-03-15 4 A 0 166667 0.00 A 544330 D Non-qualified Stock Option (Right to Buy) 6.00 2022-03-15 4 A 0 295508 0.00 A 2032-03-15 Class A Common Stock 295508 295508 D Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of 31,876 restricted stock units on March 10, 2022. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person. These shares were sold in the open market. The price reported in Column 4 is a weighted average price calculated by the broker. These shares were sold as part of a block trade in multiple transactions at various prices with a weighted average price of $6.08. The Reporting Person has provided to the Issuer, and undertakes to provide any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote with regard to the block trade. Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units. The restricted stock units have a four-year vesting schedule. 25% vest on the yearly anniversary of March 10, 2022 until fully vested, subject to the Reporting Person's continued service to the Issuer through the applicable vesting dates. The shares subject to the option have a four-year vesting schedule. 25% vest on the first anniversary of March 10, 2022. The balance will vest 6.25% quarterly thereafter until fully vested, subject to the Reporting Person's continued service to the Issuer through the applicable vesting dates. /s/ Larry Madden 2022-03-17