Advanced Emissions Solutions(ADES) - 2025 Q1 - Quarterly Results

Exhibit 99.1 Arq Reports First Quarter 2025 Results Delivered 25% YoY revenue growth driven by PAC business turnaround Achieved 8 straight quarter of double-digit YoY ASP growth, strong gross margins of 36.4%, 4 consecutive quarter of positive Adjusted EBITDA and positive net income for the quarter th th Signed second largest PAC contract in Arq's history, evidencing sustainability and value of foundational business Updating timing for first commercial GAC production at Red River to end of Q2 or early Q3 20 ...