This is the production company of Albie Hecht, founded in the mid-1980s (and resurrected in 2005).
Visuals: On a black background with some gray and white houses near the bottom, the camera pans through them to reveal a building with the large red text "WORLDWIDE BIGGIES" stacked on top of it. As the camera stop at a comfortable distance, a door opens on the building that lets out some light, and the background gradually becomes whiter. As some rays spin behind "WORLDWIDE BIGGIES", some more gray and white buildings appear at the bottom.
Variants:
Technique: Flash animation for the normal logo (as well as the zooming and Five Alts variants). CGI for the first variant.
Audio: None, the closing theme of the show or a loud rock tune.
Audio Variants:
Availability: Seen on The Naked Brothers Band and MoCap, LLC on DVD, iTunes and Amazon Instant Video. The Five Alts variant was last seen on an episode of My Family's Got Guts on Nick.com, which since has been taken down. Episodes of the show on YouTube have the ending logos cut off.