KATY originally was owned by Morden R. Buck and John R. Rider under the name of licensee San Luis Broadcasting Company but was then sold KATY to Sweetheart of San Luis Obispo Inc., which remains to this day.
In July 1952, San Luis sold KATY to Sweetheart of San Luis Obispo Inc., a group headed by Maynard Marquardt and former WCFL (Chicago) station engineer Glenn Porter for $30,000. Sweetheart held KATY for 14 years, selling the station and its FM counterpart (now KSLY) to Grandy Broadcasting Inc. for $200,000 on October 25, 1966. 
