Stem SPAC Presentation Deck

stem Overview of 2021 Revenue Coverage Bookings underpin significant visibility of 2021 $ 400 $300 $200 $100 $0 Source: Stem. $130 ■ Contracted Revenue $241 ~88% from executed contracts >14x coverage on remaining 12% of revenue target $147 Near-term Pipeline Revenue All figures above as of end of October 2020 ■2021E Revenue Confidential 28 Current Contracted Backlog 140 Projects in Process 43 Customers 2.5 MWh Average System Size

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