AboitizPower, WalterMart renew retail energy supply partnership. Aboitiz Power Corporation (AboitizPower), through its subsidiary Adventenergy Inc. (ADVENT), recently secured a long-term retail energy supply deal with WM Shopping Center Management Inc. (WMSCMI) — the developer of the WalterMart community mall chain — to power 26 of its facilities spread around Luzon.