X0306 4 2021-11-19 0 0001671933 Trade Desk, Inc. TTD 0001206977 FALBERG KATHRYN E C/O THE TRADE DESK, INC. 42 NORTH CHESTNUT STREET VENTURA CA 93001 1 0 0 0 Class A Common Stock 2021-11-19 4 S 0 80563 108.03 D 119437 I By Family Trust Class A Common Stock 2021-11-19 4 S 0 47719 108.90 D 71718 I By Family Trust Class A Common Stock 2021-11-19 4 S 0 21468 109.98 D 50250 I By Family Trust Class A Common Stock 2021-11-19 4 S 0 250 110.44 D 50000 I By Family Trust Class A Common Stock 214760 I By Trust Class A Common Stock 16650 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.42 to $108.41, 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. On June 16, 2021, the Issuer effected a 10-for-1 stock split of its common stock resulting in the reporting person's ownership of 180,000 additional shares of common stock. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.42 to $109.41, 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 $109.42 to $110.40, 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 $110.42 to $110.46, 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. Reflects a transfer exempt from reporting pursuant to Rule 16a-13. On June 16, 2021, the Issuer effected a 10-for-1 stock split of its common stock resulting in the reporting person's ownership of 28,269 additional shares of common stock. /s/ Kelli Faerber, Attorney-in-Fact for Kathryn E. Falberg 2021-11-23