Now WWD reports that the deal is about to go through: "Sources said Rosen could be heading an investment group that would buy Permira’s 45 percent stake in the designer firm." Proenza's designers. Jack McCollolugh and Lazaro Hernandez, as well as their college friend/CEO Shirley Cook, own 55%. Along with his role as CEO/Founder of Theory--which is owned by the Japanese company that also owns Uniqlo--Rosen has personally invested in Rag & Bone, Alice & Olivia, and Gryphon.
It's obvious Rosen wants to move further into the designer space, given his appointment of Olivier Theyskens as Theory's creative director. If the Proenza deal goes through, we wouldn't be surprised if Rosen announced the launch of a Theyskens designer collection, creating a little luxury group of his own.