There's also Fitch and at least one other that escapes me. Barra, maybe? More if you go international. They also rate governments for municipals to countries.

There's also Fitch and at least one other that escapes me. Barra, maybe? More if you go international. They also rate governments for municipals to countries. I used to deal with issuer ratings quite extensively several jobs ago. Been away from it for about a decade, though.