The studio iteration of the Smashing Pumpkins evidently includes:  Billy Corgan on vocals, guitar, and whatever else; Mark Tulin on bass; Mike Byrne on drums; and Kerry Brown producing/engineering/etc.
In this embedded video, Brown (incidentally, ex-Pumpkin D’arcy Wretzky’s ex-husband) answers questions from fans, with bassist Tulin co-hosting and drummer Byrne manning the camera:

Head Pumpkin Corgan is [...]