Digital Production Solutions, a subsidiary of IDT Media, announced on 2003-09-16 that it would acquire a controlling stake in Mainframe. The acquisition was completed in December 2, 2003.
However, IDT later sold its IDT Entertainment division to Liberty Media on May 26 2006.
Mainframe was then acquired by RNK Capital Limited Partnership, a wholly owned subsidiary of Rainmaker Income Fund, on July 31, 2006, which purchased 62% of the company, although the deal was announced several weeks earlier on July 20, 2006.
Rainmaker Income Fund announced on August 29, 2006, that RNK Capital Limited Partnership would acquire the 38% of shares it didn't own by merging with Rainmaker Income Fund. After the merger, Rainmaker announced on January 31 2007 that Mainframe Entertainment's name would be changed to Rainmaker Animation. However, the individual studios kept the Mainframe name after the renaming.
On 2007-11-29, Rainmaker Income Fund announced the sale of Rainmaker Visual Effects and Rainmaker Post to Deluxe Entertainment Services Group, leaving only the animation business.





