- Mapna Boiler Company
- Mapna Company
- MAPNA Electric & Control, Engineering & Manufacturing co.
- Mapna Generator Engineering and Manufacturing Company (Pars Co.)
- Mapna Locomotive Engineering and Manufacturing Company
- Mapna Operation and Maintenance Company (O&M Co.)
- Mapna Power Plant Construction and Development Company (Development One Co.)
- Mapna Turbine Blade Engineering and Construction Company (Parto Co.)
- Mapna Turbine Engineering and Manufacturing Company (TUGA Co.)
- Neyrperse Company
- Sepahan Equipment Manufacturing Company
- The Mapna Group’s Electricity Sector
- The Mapna Group’s Investment Sector
- The Mapna Group’s Oil and Gas Sector
- The Mapna Group’s Rail Transport Sector