Exhibit 99.1 ABM REPORTS SECOND QUARTER FISCAL 2024 RESULTS AND RAISES OUTLOOK FOR FISCAL YEAR 2024 ADJUSTED EPS • Revenue up 2% to $2.0 billion, all organic growth • Net income of $43.8 million and GAAP EPS of $0.69, declines of 16% and 12%, respectively • Adjusted EBITDA of $125.3 million, down 9% • Adjusted EPS of $0.87, down 3% • Operating cash flow of $117.0 million and free cash flow of $101.4 million, both up significantly • Raises outlook for fiscal year 2024 adjusted EPS to $3.40 to $3.50, up from ...