ABM Industries Incorporated

Is ABM publicly traded?
Yes. It trades on the NYSE under ticker ABM.

What does ABM stand for?
American Building Maintenance, the company's 1909 founding name.

What does ABM do?
Facility services: janitorial, engineering, aviation support, parking, manufacturing services, and technical solutions including semiconductor fab support.

Who is the CEO of ABM?
Scott Salmirs, president and CEO since 2015.

How many employees does ABM have?
Approximately 117,000, making it one of the largest service employers in the United States.

Morris Rosenberg founded American Building Maintenance in San Francisco in 1909 as a one-man window washing business. The company grew through the mid-century building boom into a national janitorial contractor, going public on the NYSE in 1962 under the American Building Maintenance Industries name.

Decades of acquisitions built a diversified facility services platform: parking through Ampco, aviation through Air Serv and Transworld Aviation, and engineering through Linc Service and other mechanical contractors. The corporate name shortened to ABM Industries as the portfolio widened beyond janitorial work.

Scott Salmirs became CEO in 2015 and pushed the company up the value chain from commodity cleaning toward integrated facility solutions, data-driven building services, and technical work. The 2021 acquisition of Able Services for approximately $830 million added significant scale in janitorial and engineering.

Recent years brought a platform modernization effort including a multi-year ERP implementation and AI investment across operations. The 2025 acquisition of WGNSTAR, a semiconductor fab technical services provider with more than 1,300 employees, gave ABM a foothold in one of the fastest-growing segments of industrial services.

The company publishes sustainability reporting covering green cleaning programs, energy efficiency services delivered to clients, and workforce safety. Its own service offering increasingly includes building decarbonization and energy retrofit work, a growth category inside Technical Solutions.

As one of the country's largest employers of hourly service workers, ABM periodically faces labor disputes and union negotiations, particularly with SEIU locals representing janitors in major cities. Wage floors and worker classification remain its most politically sensitive exposures.