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
Delta Fire Systems, Inc.
Grunau Company, Inc.
ICS, Inc.
Industrial Contractors, Inc.
Industrial Fabricators, Inc.
International Fire Protection, Inc.
Island Fire Sprinkler, Inc.
J. Fletcher Creamer & Son, Inc.
Jamar Company
Jomax Construction Company, Inc.
Landmark Sprinkler Inc.
LeJeune Steel Company
M & N Construction
Metropolitan Mechanical Contractors, Inc.
Modulus MEP, Inc.
Northland Constructors of Duluth, LLC
NYCO, Inc.
Quality Integrated Services, Inc.
Reliance Fire Protection, Inc.
Security Fire Protection Company, Inc.
Summit Pipeline Services ULC
Tessier's, Inc.
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.