X0407 4 2023-05-26 0 0001820630 Proterra Inc PTRA 0001888690 Bailey Christopher L C/O PROTERRA INC 1815 ROLLINS ROAD BURLNGAME CA 94010 0 1 0 0 President, Powered & Energy 0 Common Stock 2023-05-26 4 S 0 3742 1.1433 D 480771 D The sale reported in this Form 4 represents a nondiscretionary sale of shares required to be sold by the Reporting Person pursuant to sell to cover transactions to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units. Christopher L. Bailey, by /s/ Ron A. Metzger, Attorney-in-Fact 2023-05-30