American Opera Company was created in 1937.
American Light Opera Company was created in 1960.
Chicago Opera Company ended in 1946.
Philadelphia Opera Company ended in 1910.
Berkshire Opera Company ended in 2009.
Beecham Opera Company ended in 1920.
Opera Company of Boston ended in 1990.
Aborn Opera Company ended in 1922.
Boston Opera Company ended in 1915.
American Opera Society ended in 1970.
D'Oyly Carte Opera Company ended in 1982.
Philadelphia Grand Opera Company ended in 1921.