Any amendments to this list should be sent to the curators.

Purple indicates a Company that performs Gilbert & Sullivan almost exclusively, though they may do non-G&S concerts.
Blue indicates a Company that performs Gilbert & Sullivan regularly (at least every two or three years).
Cyan indicates a Company that has performed Gilbert & Sullivan within the past ten years.
Green indicates a Company that doesn't list its performance history, but that seems a likely candidate to perform G&S in the future.
Orange indicates a Company that has performed Gilbert & Sullivan in this century.
Red indicates a Company that doesn't list its performance history, but that seems a possible candidate to perform G&S in the future.