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3S Incorporated
American Fire Protection Group, Inc.
APi Construction Company
APi Distribution, Inc.
APi National Service Group
Classic Industrial Services, Inc.
Davis-Ulmer Sprinkler Company
Grunau Company, Inc.
ICS, Inc.
International Fire Protection, Inc.
J. Fletcher Creamer & Son, Inc.
Jamar Company
Jomax Construction Company, Inc.
LeJeune Steel Company
Metropolitan Mechanical Contractors, Inc.
Mid-Ohio Pipeline Services
MP Nexlevel
Northland Constructors of Duluth, Inc.
NYCO, Inc.
Security Fire Protection Company, Inc.
Summit Pipeline Services ULC
Tessier's, Inc.
Texas Sprinkler
Train Oilfield Services Ltd.
Twin City Garage Door Company
United Piping Inc.
United States Alliance Fire Protection, Inc.
VFP Fire Systems, Inc.
Viking Automatic Sprinkler Company
Vipond Inc.
Western States Fire Protection Co.