The story
1900 - founded by Emerson McMillin as president
1935 - enactment of Public Utility Holding Act forced break-up of company due to antitrust provisions regulating integrated utility companies
1938 - Michigan Consolidated Gas (MichCon) formed
1949 - Michigan Consolidated Gas, the Milwaukee Gas Company, the Michigan-Wisconsin Gas Company, the Austin Field Pipeline Company and the Milwaukee Solvay Company merge to become American Natural Gas Company
1981 - MichCon becomes wholly owned subsidiary of Primark
1988 - spun off
2001 - merger with DTE Energy
From Wikipedia’s article on American Light and Traction, shared under CC BY-SA 4.0.3