X0306 4 2018-12-01 0 0001671933 Trade Desk, Inc. TTD 0001671413 Stempeck Brian John C/O THE TRADE DESK, INC. 42 NORTH CHESTNUT STREET VENTURA CA 93001 0 1 0 0 Chief Client Officer Class A Common Stock 2018-12-01 4 A 0 9307 0.00 A 55246 D Class A Common Stock 2018-12-01 4 F 0 3135 142.45 D 52111 D Class A Common Stock 2018-12-01 4 F 0 2642 142.45 D 49469 D Employee Stock Option (Right to Buy) 142.45 2018-12-01 4 A 0 17535 0.00 A 2028-12-01 Class A Common Stock 17535 17535 D Represents restricted stock with a vesting commencement date ("VCD") of December 1, 2018, and which vests as to one-fourth of the granted shares on each anniversary of the VCD, subject to continued employment with the Issuer through the applicable vesting dates. Includes 919 shares acquired through the Employee Stock Purchase Plan on November 15, 2018. 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 December 23, 2016. 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 December 1, 2017. The option was granted on December 1, 2018, the VCD. One forty-eighth (1/48th) of the shares subject to the option vest on each monthly anniversary of the VCD, subject to continued employment with the Issuer through the applicable vesting dates. /s/ Vivian Yang, Attorney-in-Fact for Brian J. Stempeck 2018-12-04