According to a source with direct knowledge of Jersey Mike's operations, the restaurant's suppliers have not changed since the acquisition. Today, Jersey Mike's moves from slinging subs to also slinging stock as it goes public at a roughly $7 billion valuation . The Jersey Mike's filing is unique in that it exposes the nuts and bolts of how their plan will work. The firm is likely doubling down on Jersey Mike's franchisee development pipeline of 1,600 potential new stores, 90% of them from existing franchise owners. Blackstone also used its financial heft to help Jersey Mike's refinance much of its debt earlier this year in a $760 million whole-business securitization.