X0508 4 2023-07-13 0 0001671933 Trade Desk, Inc. TTD 0001826731 GRANT JAY R C/O THE TRADE DESK, INC. 42 NORTH CHESTNUT STREET VENTURA CA 93001 0 1 0 0 Chief Legal Officer 1 Class A Common Stock 2023-07-13 4 M 0 21525 57.391 A 184423 D Class A Common Stock 2023-07-13 4 M 0 17185 59.57 A 201608 D Class A Common Stock 2023-07-13 4 S 0 21795 88.00 D 179813 D Class A Common Stock 2023-07-13 4 S 0 17185 90.00 D 162628 D Employee Stock Option (Right to Buy) 57.391 2023-07-13 4 M 0 21525 0.00 D 2030-10-05 Class A Common Stock 21525 27675 D Employee Stock Option (Right to Buy) 59.57 2023-07-13 4 M 0 17185 0.00 D 2032-04-26 Class A Common Stock 17185 65323 D The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on March 16, 2023 in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.60 to $88.00, inclusive. The Reporting Person undertakes to provide to the Issuer, 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 ranges set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.00 to $90.06, inclusive. The Reporting Person undertakes to provide to the Issuer, 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 ranges set forth in this footnote. The option was granted on October 5, 2020, the Vesting Commencement Date ("VCD"). One-fourth (1/4th) of the shares subject to the option vest on the first anniversary of the VCD, with one forty-eighth (1/48th) of the shares subject to the original grant vesting on each monthly anniversary thereafter, subject to continued employment with the Issuer through the applicable vesting dates. This option was previously reported as covering 4,920 shares at an exercise price of $573.91 per share but was adjusted to reflect a 10-for-1 stock split effective June 16, 2021. The option was granted on April 26,2022, 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/ Kelli Faerber, Attorney-In-Fact for Jay R. Grant 2023-07-17