EXHIBIT 21.1
Subsidiaries of Registrant
as of 10/31/01
Percentage
of Voting
Securities
Owned by
State of Immediate
Name Incorporation Parent
- ---- ------------- ----------
ABM Industries Incorporated Delaware Registrant
(*) ABM Co. of Boston California 100%
ABM Engineering Services Company California 100%
ABM Facility Services Company California 100%
ABM Global Facility Services + California 100%
ABM Janitorial Services - Northern California California 100%
ABM Janitorial Services Co., Ltd. British Columbia 100%
ABM Supply Company + California 100%
Accurate Janitor Service, Inc. + California 100%
American Building Maintenance Co. California 100%
American Building Maintenance Co. of Georgia California 100%
American Building Maintenance Co. of Hawaii + California 100%
Allied Maintenance Services, Inc. California 100%
American Building Maintenance Co. of Illinois California 100%
American Building Maintenance Co. of Kentucky + California 100%
American Building Maintenance Co. of New York California 100%
American Building Maintenance Co. of Utah + California 100%
American Building Maintenance Co. - West California 100%
American Public Services California 100%
American Security and Investigative Services, Inc. + California 100%
ABMI Investigative Services + California 100%
ABMI Security Services, Inc. California 100%
American Commercial Security Services, Inc. California 100%
Ampco System Parking California 100%
Amtech Elevator Services California 100%
Amtech Energy Services + California 100%
Amtech Lighting & Electrical Services California 100%
Amtech Lighting Services California 100%
Amtech Lighting Services of the Midwest California 100%
Amtech Reliable Elevator Company of Texas + Texas 100%
Beehive Parking, Inc. + Utah 100%
Bonded Maintenance Company Texas 100%
Bradford Building Services, Inc. California 100%
California Janitorial and Supply Co. + California 100%
Canadian Building Maintenance Co., Ltd. + British Columbia 100%
CommAir Mechanical Services California 100%
Commercial Air Conditioning of Northern California, Inc. + California 100%
Commercial Property Services, Inc. + California 100%
Servall Services, Inc. Texas 100%
Supreme Building Maintenance, Ltd. British Columbia 100%
System Parking, Inc. + California 100%
Towel and Linen Service, Inc.+ California 100%
(*) Subsidiary relationship to registrant or to subsidiary parents shown by
progressive indentation.
+ Inactive companies.