As a businesswoman, she and sister with erstwhile manager Manny Valera established Excellent Productions in 1990, but was later renamed Diamond Star Productions, Inc. taking over the weekly production of her TV drama show when Regal Films decided to discontinue. It was renamed "The Maricel Soriano Drama Special" with her sister as executive producer while she is the line producer. The same production outfit was responsible for TV sitcoms -"Kaya ni Mister, Kaya ni Misis", "Mary D'Potter" and "Bida si Mister, Bida si Misis" and the film "Kung Kaya Mo, Kaya Ko Rin" (1996) with Cesar "Buboy" Montano. She also opened Mr. Melody, a sing-along bar in Quezon City and Diamond Star Records.