In 1990, Sibley's parent, May Co., merged operations with Pittsburgh, Pennsylvania-based Kaufmann's. That same year, local chain AM&A's (Adam, Meldrum & Anderson Company) moved from the nearby Thruway Mall into the space originally planned for B. Altman. The owner of the Thruway Mall sued the AM&A's chain, claiming breach of contract; the chain would later be declared liable for damages to the Thruway Mall, which was subsequently torn down and rebuilt as a strip mall in the early 1990s. Finally, Hoyts sold the Walden Galleria theater complex to General Cinemas by the end of the year.