Federal Signal Reports Strong Fourth Quarter Results and Positive Outlook for 2021 News provided by Share this article Share this article OAK BROOK, Ill., Feb. 25, 2021 /PRNewswire/ -- Federal Signal Corporation (NYSE:FSS), a leader in environmental and safety solutions, today reported results for the fourth quarter and year ended December 31, 2020. Fourth Quarter Highlights Operating margin of 11.5%, compared to 11.6% last year Adjusted EBITDA margin of 15.9%, up from 15.4% last year GAAP EPS of $0.42 Adjusted EPS of $0.44 Operating cash flow of $57 million, up 27% from last year $82 million of cash and $280 million of credit facility availability at end of year 2021 adjusted EPS * outlook of $1.73 to $1.85