Headquarters: Ridgefield, Conn.
Business: Refines crude oil into fuel and other products at St. Paul Park refinery; has 166 company-operated and 67 franchised SuperAmerica stores in Minnesota and Wisconsin; stake in Minnesota pipeline.
History: Acquired refinery, pipeline and stores from Marathon Oil Corp. in 2010; initial public offering of master limited partnership units in July 2012.
Ticker: NTI
