Luminate is a provider of music sales data. Established by Mike Fine and Mike Shalett in 1991, data is collected weekly and made available every Sunday and every Monday to subscribers, which include record companies, publishing firms, music retailers, independent promoters, film and TV companies, and artist managers. It is the source of sales information for the Billboard music charts. It is owned by PMRC, a joint venture between Eldridge Industries and Penske Media Corporation.