Exhibit 99.1 AAON Reports Second Quarter 2025 Results Q2 Highlights (All comparisons are year-over-year, unless otherwise noted) 1 • Operations impacted by ERP roll out and supply constraints ◦ Net sales down 0.6% to $311.6 million ◦ GAAP diluted EPS of$0.19 down 69.4% and Non-GAAP adjusted diluted EPS of $0.22 down 64.5% ◦ Non-GAAP Adjusted EBITDA margin down 1,120 basis points to 14.9% • Strong bookings trends of both AAON- and BASX-branded equipment points to share gains continuing ◦ Adjusted backlog up ...