Complex sentence: The label is distributed in the United States by RED Distribution, having had previously been distributed by Atlantic Records from 1987 to 1991 while Anthrax's recordings from 1985 to 1991 were marketed by Island Records.
Split into simpler sentences: The label is distributed in the United States by RED Distribution. It was distributed by Atlantic Records in the United States from 1987 to 1991 while Anthrax's recordings from 1985 to 1991 were marketed by Island Records.