SAN FRANCISCO, CA — September 6, 2006 — ABM Industries Incorporated (NYSE:ABM), a leading facility services contractor in the United States, today reported income from continuing operations for the third quarter of fiscal 2006 of $17.3 million ($0.35 per diluted share), down 16.2%, compared to $20.6 million ($0.41 per diluted share) for the prior year third quarter. Sales and other income for the third quarter of fiscal 2006 were $689.3 million, up 6.0% from $650.1 million in the third quarter of fiscal 2005.

During the third quarter, we achieved record revenue and quarterly earnings above our previous guidance,” commented Henrik Slipsager, ABM’s president and chief executive officer. “We delivered positive top-line comparisons across our janitorial, parking, security, engineering and lighting segments. Income from continuing operations for the quarter was solid. Our cash flow from operations was strong, generating $30 million for the quarter.”

There were two items that specifically impacted the quarterly comparison for janitorial operations. The third quarter of fiscal 2006 included one more work day than the comparable period in fiscal 2005, unfavorably impacting janitorial fixed-price contracts by approximately $2.4 million pre-tax. In addition, a gender discrimination lawsuit was settled in the third quarter of 2005 for an amount lower than accrued, which increased income from continuing operations by $1.3 million pre-tax in that quarter.

The 2006 actuarial report covering substantially all of the Company’s self-insurance reserves was completed in the third quarter of 2006. The report showed favorable developments in the Company’s California workers’ compensation and general and auto liability claims, offset in part by adverse development in the Company’s workers’ compensation claims outside of California, which resulted in a $7.9 million pre-tax reduction in the Company’s self-insurance reserve in the third quarter of 2006. This reduction was $1.1 million less than the $9.0 million pre-tax reduction in self-insurance reserves recorded in the third quarter of 2005. Of the $7.9 million pre-tax benefit in 2006, $4.7 million pre-tax was recorded by Corporate while $3.2 million pre-tax was allocated to the operating segments. The Company reported income from continuing operations during the nine months ended July 31, 2006 of $31.6 million ($0.64 per diluted share) on sales and other income of $2.0 billion, compared to $35.1 million ($0.69 per diluted share) on sales and other income of $1.9 billion for the same period last year. The 9.8% year-over-year decrease in income from continuing operations was primarily due to the $2.6 million pre-tax of share-based compensation costs as a result of the adoption of SFAS 123R, and $2.4 million pre-tax of professional fees for the Audit Committee’s independent investigation of the prior year accounting at SSA. Income from continuing operations in 2005 included a $5.0 million pre-tax litigation loss and a $3.4 million pre-tax charge for the amount the Company believes it overpaid SSA LLC, which reserve was reduced by $1.0 million pre-tax in the third quarter of 2006. Also included in 2005 was $2.7 million of income tax benefit resulting from a state tax audit settlement and $1.2 million pre-tax gain on the World Trade Center indemnity payment.

ABM’s financial position remains very strong as the Company ended the quarter with $51.5 million in cash and cash equivalents, $261.8 million in working capital and no long term debt.

“Given the strength of our balance sheet and our cash flow from continuing operations, we remain well positioned to expand our business through a combination of acquisitions and organic growth and to repurchase shares. We expect income from continuing operations for fiscal 2006 will be in the range of $1.80 to $1.85 per diluted share, which includes approximately $45 million or $0.90 per diluted share for the settlement of the business interruption insurance claim related to the destruction of the World Trade Center complex in New York City. We are reviewing strategic investments in our information technology infrastructure. Should we decide to implement these programs and enhancements, there will be one-time costs that are not reflected in our guidance,” Slipsager concluded.

Conference Call

On Thursday, September 7, 2006 at 6:00 a.m. (PDT), ABM will host a live webcast of remarks by President and Chief Executive Officer Henrik C. Slipsager, and Executive Vice President and Chief Financial Officer George B. Sundby. The webcast will be accessible at www.irconnect.com/primecast/06/q3/abm_3q2006.html. Listeners are asked to be online at least fifteen minutes early to register, as well as to download and install any complimentary audio software that might be required. Following the call, the webcast will be available at this URL for a period of three months. In addition to the webcast, a limited number of toll-free telephone lines will also be available for listeners who are among the first to call 800-524-4293 within fifteen minutes before the event. Telephonic replays will be accessible during the period from two hours to seven days after the call by dialing 800-642-1687, and then entering ID # 5032449.

About ABM Industries

ABM Industries Incorporated (NYSE:ABM) is among the largest facility services contractors listed on the New York Stock Exchange. With fiscal 2005 revenues in excess of $2.5 billion and more than 73,000 employees, ABM provides janitorial, parking, security, engineering and lighting services for thousands of commercial, industrial, institutional and retail facilities in hundreds of cities across the United States and British Columbia, Canada. The ABM Family of Services includes ABM Janitorial; Ampco System Parking; ABM Security Services, which includes American Commercial Security Services (ACSS) and Security Services of America (SSA); ABM Facility Services; ABM Engineering; and Amtech Lighting Services.

Cautionary Statement Under the Private Securities Litigation Reform Act of 1995.

Cautionary Statement Under the Private Securities Litigation Reform Act of 1995. This press release contains forward-looking statements that set forth management’s anticipated results based on management’s plans and assumptions. Any number of factors could cause the Company’s actual results to differ materially from those anticipated. These risks and uncertainties include, but are not limited to: (1) delays in remediating the material weakness in controls identified in the Company’s security business; (2) a change in the frequency or severity of claims against the Company, a deterioration in claims management, or the cancellation or non-renewal of the Company's primary insurance policies; (3) a change in actuarial analysis that causes an unanticipated change in insurance reserves; (4) inadequate technology systems that cannot support the growth of the business; (5) labor disputes that lead to a loss of sales or expense variations; (6) acquisition activity slows or is unsuccessful; (7) a decline in commercial office building occupancy and rental rates lowers sales and profitability; (8) weakness in airline travel and the hospitality industry that affects the results of the Company's Parking segment; (9) financial difficulties or bankruptcy of a major customer; (10) the loss of long-term customers; (11) intense competition that lowers revenue or reduces margins; (12) an increase in costs that the Company cannot pass on to customers; (13) natural disasters or acts of terrorism that disrupt the Company in providing services; (14) significant accounting and other control costs that reduce the Company’s profitability; and (15) other issues and uncertainties that may include: new accounting pronouncements or changes in accounting policies, labor shortages that adversely affect the Company’s ability to employ entry level personnel, legislation or other governmental action that detrimentally impacts the Company’s expenses or reduces sales by adversely affecting the Company’s customers, unanticipated adverse jury determinations, judicial rulings or other developments in litigation to which the Company is subject, a reduction or revocation of the Company’s line of credit that increases interest expense and the cost of capital, and the resignation, termination, death or disability of one or more of the Company’s key executives that adversely affects customer retention or day-to-day management of the Company. Additional information regarding these and other risks and uncertainties the Company faces is contained in the Company’s Annual Report on Form 10-K and in other reports it files from time to time with the Securities and Exchange Commission. The Company undertakes no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise.