X0306 4 2019-06-14 0 0001671933 Trade Desk, Inc. TTD 0001615037 Yang Vivian C/O THE TRADE DESK. 42 N. CHESTNUT ST. VENTURA CA 93001 0 1 0 0 Chief Legal Officer Class A Common Stock 2019-06-14 4 S 0 1389 246.28 D 42464 D Class A Common Stock 2019-06-14 4 C 0 5546 0.00 A 48010 D Class A Common Stock 2019-06-14 4 S 0 5546 242.51 D 42464 D Employee Stock Option (right to Buy) 18.03 2019-06-14 4 M 0 5546 0.00 D 2026-08-14 Class B Common Stock 5546 18977 D Class B Common Stock 0.00 2019-06-14 4 M 0 5546 0.00 A Class A Common Stock 5546 5546 D Class B Common Stock 0.00 2019-06-14 4 C 0 5546 0.00 D Class A Common Stock 5546 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $246.27 to $246.38, 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 $242.50 to $242.58, 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 August 15, 2016, 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. Each share of Class B Common Stock has no expiration date and is convertible for no additional consideration into one (1) share of Class A Common Stock at the option of the holder thereof at any time and upon certain other circumstances. /s/ Paul E. Ross, Attorney-in-Fact for Vivian Yang 2019-06-17