Beecham Opera Company was created in 1915.
Beecham - pharmaceutical company - was created in 1859.
Berkshire Opera Company ended in 2009.
Philadelphia Opera Company ended in 1910.
Opera Company of Boston ended in 1990.
Aborn Opera Company ended in 1922.
Chicago Opera Company ended in 1946.
American Opera Company ended in 1930.
Boston Opera Company ended in 1915.
D'Oyly Carte Opera Company ended in 1982.
Philadelphia Civic Opera Company ended in 1930.
British National Opera Company ended in 1929.