- Asheville Lyric Opera
- Berkshire Opera Co
- Boheme Opera NJ
- Boston Bel Canto Opera
- Boston Children's Opera
- Boston Festival Opera LTD
- Boston Lyric Opera
- Boston Opera House Inc
- Bostonian Opera & Concert
- Commonwealth Opera Inc
- CPCC Opera Theatre
- Frederick Festival Of The Arts
- Longwood Opera
- Lyric Opera Of Kansas City
- Minnesota Opera
- Motor City Lyric Opera
- Motor City Lyric Opera
- Nevada Opera Assn
- Nevada Opera Theatre
- New England Light Opera
- New Jersey State Opera
- Opera Boston
- Opera Grand Rapids
- Opera House Grand Ledge
- Opera League Of Nh
- Opera New England Of Cape Cod
- Opera North
- Opera Presto
- Opera Vivente
- Opera Worcester Inc
- Pine Mountain Music Festival
- Piper's Opera House
- Prism Opera
- Springfield Regional Opera
- State Repertory Opera
- Twin Cities Opera Guild
- Union Avenue Opera Theatre
- Victorian Lyric Opera Co
