D'Oyly Carte Opera Company was created in 1875.
The Philadelphia Dance Company was created in 1970.
Your answer depends totally on the size of the opera company. Further, it depends on whether the company includes -- or not -- the opera ballet, the opera chorus, the opera orchestra, the opera production company and crew, the administration for the company, and so forth.
Opera Company of Boston ended in 1990.
If you mean the opera scene from the movie "Philadelphia" (which used Springsteen's Streets of Philadelphia) as a theme tune), it was the aria "La Mamma Morta" ("They killed my mother") sung by Maria Callas from a performance of the 1896 opera Andréa Chenier by Giordino.
Philadelphia Opera Company was created in 1938.
Philadelphia Civic Opera Company was created in 1924.
Philadelphia Lyric Opera Company was created in 1958.
Philadelphia Grand Opera Company was created in 1926.
Philadelphia Civic Grand Opera Company was created in 1950.
Philadelphia La Scala Opera Company was created in 1925.
Philadelphia Opera Company ended in 1910.
Philadelphia Lyric Opera Company ended in 1974.
Philadelphia Civic Opera Company ended in 1930.
Philadelphia Grand Opera Company ended in 1921.
Philadelphia Civic Grand Opera Company ended in 1955.
Philadelphia La Scala Opera Company ended in 1954.