ArcLight Clean Transition Corp. Information Request Form

You are hereby notified that Levi & Korsinsky, LLP has commenced an investigation into the fairness of the merger of ArcLight Clean Transition Corp. (“ArcLight” or the “Company”) (NASDAQ: ACTC) with Proterra Inc. Upon closing of the business combination, Proterra’s common stock is expected to trade on the Nasdaq under the ticker symbol PTRA. The public stockholders of ACTC will own 11.6% of the post-close PTRA.

The ArcLight merger investigation concerns whether the Board of ArcLight has harmed stockholders by agreeing to enter into this transaction and whether all material facts have been properly disclosed to stockholders.