Carlson timeline

1938: Founded by Curtis L. Carlson

1962: Carlson acquires its first Radisson hotel

1975: Acquires TGI Fridays restaurants

1979: Carson enters the travel business

1998: Marilyn Carlson Nelson named president and CEO

2013: Diana Nelson named chairwoman

May 2014: Carlson sells TGI Fridays

August 2014: Carlson acquires the 45 percent interest in Carlson Wagonlit Travel owned by JPMorgan Chase

January 2016: Carlson rumored to be shopping its hotel group

April 2016: Carlson announces deal with HNA Tourism Group for its hotel group