Abstract: PT Cogindo Daya Bersama (CDB) was established with the aim of holding a commercial business in power supply generation and other related fields. The company has a market share up to 24.5%, making it the second largest company in operation and maintenance (O&M) services of power plants in Indonesia. The electricity market is currently growing, yet the revenues of PT CDB tend to decrease in the last 4 years. The purpose of this research is to determine the development future strategies of portfolio of business lines at PT CDB.