Advent SPAC Presentation Deck

Transaction Summary Advent Technologies, Inc. Vasilis Gregoriou Chairman & CEO 7 Emory De Castro CTO AMCI Acquisition Corp. Bill Hunter CEO & President Incoming President & CFO of Advent Technologies, Inc. 2 AMCI & Advent Technologies - An ideal combination to unlock the Hydrogen Economy Transaction Structure AMCI Acquisition Corp. ("AMCI") has proposed to enter into a business combination with Advent Technologies, Inc. ("Advent"), an innovation driven fuel cell technology company that is unlocking the Hydrogen Economy AMCI (NASDAQ:AMCI) is a publicly listed special purpose acquisition company with -$93 million of cash held in trust, and has raised a $65 million PIPE to provide further capital in the transaction Advent and AMCI are combining to advance the development and manufacturing of Advent's platform technology that is based on high-temperature proton exchange membranes (HT-PEM) The transaction will fully fund the next phase of Advent's expansion efforts to respond to significant and immediate market opportunities Advent's existing shareholders are rolling 100% of their equity It is anticipated that the post-closing company will retain the Advent name and be listed on Nasdaq The transaction is currently expected to close in early 2021 Valuation Transaction implies pro forma enterprise value of $326 million (1) 2 2.7x 2024E Revenue projection of $122.8 million, compared to peer average of 24.2x(²) 2 13.7x 2024E EBITDA projection of $23.8 million, compared to peer average of 119.6x(2) Existing Advent shareholders will receive 54% of the pro forma equity(1) Pro forma, Advent will have -$135 million of cash to help realize production ramp up (1) Refer to page 35 for additional details. (2) Refer to page 36 for peer analysis. www.advent.energy AMCI ADVENT Acquisition Corp. 4

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