As a result of this acquisition, Fortis became one of Alberta's major regulated electrical distribution companies, serving 415,000 Albertans in 2005.

The Belize Association of Non-Government Organisations took Fortis to the Judicial Committee of the Privy Council in 2003 to have a new environmental assessment of the Chalillo Dam on the Macal River which was a hydroelectricity development project.

Ecologists were concerned over the future of species such as the scarlet macaw, the tapir and the black howler monkey as the project would flood 10 km2 of rainforest in Belize.

[8] On February 21, 2012, CH Energy Group (a holding company for Central Hudson Gas & Electric, an upstate New York utility), announced a pending acquisition by Fortis valued at $1.5 billion.

[10] On February 9, 2016, Fortis announced an agreement to acquire ITC Holdings Corp., the largest independent transmission utility in the United States, for US$11.3 billion in cash and stock.