X0306 4 2021-08-15 0 0001671933 Trade Desk, Inc. TTD 0001783262 Hulst Michelle C/O THE TRADE DESK INC. 42 N. CHESTNUT STREET VENTURA CA 93001 0 1 0 0 Chief Operating Officer Class A Common Stock 2021-08-15 4 F 0 2169 80.91 D 59281 D Class A Common Stock 2021-08-15 4 F 0 1073 80.91 D 58208 D The shares were withheld at the election of the Reporting Person to satisfy tax withholding obligations in connection with the partial vesting of a Restricted Stock Award granted July 29, 2020. Includes 560 shares acquired through the Employee Stock Purchase Plan on May 15, 2021. On June 16, 2021, the Issuer effected a 10-for-1 stock split ("Stock Split") of its common stock resulting in the reporting person's ownership of 55,305 additional shares of common stock. All transactions presented prior to the effective date of the Stock Split have been retroactively adjusted to reflect the impact of the Stock Split. The shares were withheld at the election of the Reporting Person to satisfy tax withholding obligations in connection with the partial vesting of a Restricted Stock Award granted April 28, 2021. /s/ Alfred Palomino Attorney-in-Fact for Michelle Hulst 2021-08-17