X0206 3 2021-04-14 0 0001823593 TuSimple Holdings Inc. TSP 0001336664 Buss Brad W 9191 TOWNE CENTRE DRIVE, STE 600 SAN DIEGO CA 92122 1 0 0 0 Series E Convertible Preferred Stock Common Stock 141441 I By trust Series E Convertible Preferred Stock Common Stock 141442 I By trust Restricted Stock Unit Common Stock 17680 D Stock Option (right to buy) 4.20 2030-12-23 Common Stock 60000 D The shares are held by the 2011 Buss Family Trust, of which the Reporting Person is trustee. The reported security is convertible into the issuer's Common Stock on a one-for-one basis at any time at the holder's election and shall automatically convert into Class A Common Stock immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date. The shares are held by the Buss Family Heritage Trust, of which the Reporting Person is trustee. The reported security is convertible into the issuer's Common Stock on a one-for-one basis at any time at the holder's election and shall automatically convert into Class A Common Stock immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date. The Reporting Person was granted Restricted Stock Units ("RSUs") which represent a contingent right to receive one share of Class A Common Stock for each RSU. The RSUs are subject to a service-based vesting requirement, which shall be satisfied over a one-year period. 25% of the RSUs vested on March 15, 2021 and 25% of the RSUs shall vest each quarter thereafter, subject to the Reporting Person's continuous service with the issuer. The options are subject to a service-based vesting requirement, which shall be satisfied over a three-year period. One-twelfth of the options vested on March 15, 2021 and one-twelfth of the options shall vest each quarter thereafter, subject to the Reporting Person's continuous service with the issuer. The option may also be early exercised, subject to the issuer's right of repurchase. /s/ James Mullen, Attorney-in-Fact 2021-04-14