RKK Energiya NPO EnergoMash OKB Fakel KB KhimAvtomatiki (KB-KhA, also known as CADB) KB KhimMash OAO SNTK Kuznetsov (Dvigateli NK) NII Mashinostroeniya OAO Motorostroitel NII Teplovye Processy (NII-TP) NPO Saturn (KB Lyulka)
Alliant Techsystems (ATK) Allied Aerospace (formerly GASL/Gruen Applied Science Laboratory) ATK Thiokol Propulsion (a subsidiary of ATK) Atlantic Research Corp. (ARC) Boeing Rocketdyne Busek GenCorp Aerojet General Dynamics Ordnance & Tactical Systems (formerly Primex Technologies, Olin Aerospace and Kaiser-Marquardt) Northrop Grumman Space Technology (formerly TRW) Pratt&Whitney Space Propulsion Operations (SPO) Saddleback Aerospace Summa Technology