Exhibit 99.1 Ameresco Reports First Quarter 2024 Financial Results Solid Execution with Growth Across All Business Lines 45% Y/Y Growth in Contracted Backlog Over 750 MWe Ameresco Owned Energy Assets in Development Reaffirms 2024 Guidance First Quarter 2024 Financial Highlights: • Revenues of $298.4 million • Net loss attributable to common shareholders of$2.9 million • GAAP EPS of ($0.06) • Non-GAAP EPS of ($0.10) • Adjusted EBITDA of $30.8 million FRAMINGHAM, MA – May 7, 2024 – Ameresco, Inc. (NYSE:AMRC) ...