ACEN Corp. engages in power generation and trading, oil and mineral exploration, development, and production. It operates through the following segments: Philippines, International, and Parent and Others. The Philippines segment includes Retail Electricity Supply, Renewables, Thermal, Project development, Leasing, Bulk water supply, Petroleum and exploration. The International segment represents the operations of ACRI, which is the holding company for all offshore investments. The Parent and Others segment refers to the operations of the Parent Company excluding RES / CO and ACE Shared Services, Inc. It also includes interest expenses incurred by ACEN Finance Limited. The company was founded on September 8, 1969 and is headquartered in Makati City, Philippines.