HOLLYWOOD — Longtime Kaplan-Stahler-Gumer-Braun Agency prexy Bob Gumer has ankled the tenpercentery and joined rival APA.

Gumer will serve as senior VP in the TV lit department at APA. Meanwhile, his old firm has now rebranded itself as the Kaplan-Stahler-Braun Agency.

Gumer spent 14 years at K-S-G-B; before that, he was a lit agent at ICM for seven years. Clients expected to join him at APA include “Alien Nation” and “Farscape” creator Rockne S. O’Bannon; “Mad TV” exec producer Dick Blasucci; and “Angel” co-creator David Greenwalt.

In moving to APA, Gumer characterized the agency as “strong and vibrant,” and one “where cooperation is encouraged and rewarded.”

Gumer’s resume also includes stints as an entertainment attorney and as a business affairs exec, and later a comedy development exec at Columbia Pictures Television.

Reps for Kaplan-Stahler-Braun were unavailable for comment.