Proterra SPAC Presentation Deck

PROTERRA BUSINESS UNITS PROTERRA POWERED PROTERRA ENERGY PARE? SOLUTIONS 1 Outsourcing Likely to Remain a Major Component of OEMs' Battery Strategies Transit & School Buses 1 PROTERRA OEMs Typically Outsource Most, if Not All, Diesel/CNG Powertrains Across Most Commercial Vehicle Segments Already April 8, 2021 TRANSIT 100% Cutaway Chassis 2 100% 13rd-Party Supplier Technology leadership Straight Class 8 Trucks 3 2 <25% >75% Three Critical Elements of the Value that Proterra Powered Provides to OEMs in their Electrification Initiatives Speed to market Medium-Duty Trucks 4 25% 4. Based on Cummins' reported share of the North American medium-duty market in 2020 5. Based on Cummins' reported share of the global excavator market in 2020 75% Vertically-Integrated PROTERRA 3 Excavators 5 <85% 1. North American market. Based on product spec sheets from New Flyer, Nova Bus, Bluebird, Navistar, and Thomas Built Buses 2. North American market. While cutaway chassis include powertrains produced by "first-stage" manufacturers, they are by definition sold to "second-stage" manufacturers who build bodies on top of them 3. North American market. Based on Allison Transmission's 2019 and 2020 market share >15% Scale and Flexibility 28

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