The station was sold in 1977, to Faribault County Broadcasting Co. for $200,000, principally owned by Paul C. Hedberg and his wife.
From January 1993 to the fall of 2000, KEEZ was owned and operated by Nolan Broadcast Group.
KEEZ's longtime competitor, 96.7 KDOG, was a CHR station from 1984 until shifting to hot AC in 2000.
While Z99 was a hot AC format during the daytime (playing a mix of hit music from the 1980s, 1990s, 2000s and today), it took a Top 40/CHR format at night, as the station added hip-hop to their playlist, thus it could be considered an adult Top 40.
The next day, at 9 a.m., KEEZ relaunched with a hot adult contemporary format as "Mix 99.1".