Sec Form 4 Filing - Mullen James @ TuSimple Holdings Inc. - 2021-09-29

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 Mullen James 2. Issuer Name and Ticker or Trading Symbol TuSimple Holdings Inc. [ TSP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) See Remarks (Last) (First) (Middle) 9191 TOWNE CENTRE DRIVE, STE 600 3. Date of Earliest Transaction (MM/DD/YY) 09/29/2021 (Street) SAN DIEGO, CA92122 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 Class A Common Stock 09/29/2021 M 10,000 A 10,000 D Class A Common Stock 09/30/2021 S( 2 ) 1,200 D $ 36.2183 ( 3 ) 8,800 D Class A Common Stock 09/30/2021 S( 2 ) 1,816 D $ 37.2393 ( 4 ) 6,984 D

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 Restricted Stock Unit ( 5 ) 09/29/2021 M 10,000 ( 5 ) ( 5 ) Class A Common Stock 10,000 ( 5 ) 30,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Mullen James 9191 TOWNE CENTRE DRIVE, STE 600 SAN DIEGO, CA92122 See Remarks Signatures /s/ Laura Donald, Attorney-in-Fact 10/01/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The Reporting Person received Restricted Stock Units ("RSUs") that represent a contingent right to receive one share of Class A Common Stock for each RSU upon the satisfaction of applicable vesting conditions. The shares were issued pursuant to vested RSUs. ( 2 )The sales reported represent shares of Class A Common Stock required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs. These sales are mandated by the issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person. ( 3 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $35.65 to $36.60, inclusive. The Reporting Person undertakes to provide to 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 range(s) set forth in footnotes 3 and 4 of this Form 4. ( 4 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $36.72 to $37.52, inclusive. ( 5 )The Reporting Person was granted RSUs which represent a contingent right to receive one share of Common Stock for each RSU. The RSUs are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. 25% will vest on September 29, 2021 and 6.25% of the RSUs shall vest each quarter thereafter, subject to the Reporting Person's continuous service with the issuer.

Remarks: Chief Administrative and Legal Officer

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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