Sec Form 4 Filing - Green Jeffrey Terry @ Trade Desk, Inc. - 2021-10-06

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Green Jeffrey Terry 2. Issuer Name and Ticker or Trading Symbol Trade Desk, Inc. [ TTD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) C/O THE TRADE DESK, INC., 42 NORTH CHESTNUT STREET 3. Date of Earliest Transaction (MM/DD/YY) 10/06/2021 (Street) VENTURA, CA93001 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Option (Right to Buy) $ 68.29 10/06/2021 A 19,200,000 ( 1 )( 2 ) 10/06/2031 Class A Common Stock 19,200,000 $ 0 19,200,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Green Jeffrey Terry C/O THE TRADE DESK, INC. 42 NORTH CHESTNUT STREET VENTURA, CA93001 X X President and CEO Signatures /s/ Jeffrey Terry Green 10/08/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The shares subject to the option vest in eight tranches over a ten-year term beginning on October 6, 2021, (the "Grant Date"), and ending on October 6, 2031, (i) if the closing price of Issuer's Class A Common Stock measured over any 30-consecutive-trading-day period equals or exceeds $90.00, $115.00, $145.00, $185.00, $225.00, $260.00, $300.00 or $340.00, respectively, and (ii) for the first four years following the Grant Date, subject to continued service as the Issuer's Chief Executive Officer as of the applicable vesting date, and thereafter subject to continued service for the Issuer as of the applicable vesting date as Chief Executive Officer or in another role to be determined by the board of directors. ( 2 )The number of awards shown is at the highest level, with the target level being an aggregate of 16,000,000 shares; the actual number of shares of Class A Common Stock issuable upon vesting is subject to adjustment based on the greatest result of three tests tied to the stock price of the Issuer's Class A Common Stock relative to performance of the companies comprising the Nasdaq-100 Index as of the Grant Date, and may range from 80% to 120% of the target level (12,800,000 to 19,200,000 shares in the aggregate).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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