X0306 4 2021-02-09 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 2021-02-09 4 A 0 255000 0.00 A 255000 D Class A Common Stock 2021-02-09 4 A 0 255000 0.00 A 510000 D Class A Common Stock 2021-02-10 4 M 0 15000 0.00 A 525000 I By Viant Technology Equity Plan LLC Class A Common Stock 2021-02-10 4 S 0 15000 25.00 D 510000 I By Viant Technology Equity Plan LLC Class B Common Stock 474356 I By Viant Technology Equity Plan LLC Class B Units 0.00 2021-02-10 4 M 0 15000 0.00 D Class A Common Stock 15000 474356 I By Viant Technology Equity Plan LLC Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units. The award vests approximately 37.5% on August 8, 2021, and in approximately equal quarterly installments thereafter, subject to the Reporting Person's continued service to the Issuer. Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units. The award vests approximately 18.75% on August 8, 2021, and in approximately equal quarterly installments thereafter, subject to the Reporting Person's continued service to the Issuer Reflects the exchange of Class B Units into shares of Class A Common Stock of the Issuer. Upon the exchange, the corresponding shares of Class B Common Stock were automatically cancelled. In connection with the Issuer's initial public offering, 15,000 shares of Class A Common Stock beneficially owned by the Reporting Person were sold to the underwriters. The Class B Units of Viant Technology LLC are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock will be automatically cancelled. /s/ Larry Madden 2021-02-11