 BOSTON--BUSINESS WIRE--Advent Technologies Holdings, Inc. NASDAQ: ADN Advent today announced consolidated financial results for the three months ended March 31, 2021. All amounts are in U.S. dollars unless otherwise noted and have been prepared in accordance with U.S. generally accepted accounting principles GAAP. Q1 2021 Financial Highlights all comparisons are to Q1 2020 unless otherwise noted Total revenue was 1.49 million, a year-over-year increase of 1.39 million, the result 