The story
Founded as TransCanada Power L.P. the company was renamed EPCOR Power L.P. after TransCanada Corporation sold its interest in the partnership to EPCOR Utilities Incorporated on September 1, 2005. It was then renamed on November 5, 2009 to reflect the transfer of ownership from EPCOR Utilities to its newly created spin-off Capital Power Corporation.
On November 7, 2011, Atlantic Power Corporation completed it plan of arrangement to acquire the company.
From Wikipedia’s article on Capital Power Income, shared under CC BY-SA 4.0.3