Prime Books was created in 2001.
OR Books was created in 2010.
Seren Books was created in 1981.
Coliseum Books was created in 1974.
Tightrope Books was created in 2005.
Howard Books was created in 1969.
BBC Prime was created in 1995.
The Prime Element was created in 1976.
Prime of My Life was created in 1990.
Opes Prime was created in 2003.
Prime League was created in 1997.
Prime Press was created in 1947.
Superboy-Prime was created in 1985.