(Bloomberg) -- Inspire Brands Inc., the owner of fast-food chains Dunkin', Arby's and Jimmy John's, filed confidentially for a US initial public offering. The number of shares and price range for the proposed offering haven't been determined, according to a company statement Friday. The IPO could raise roughly $2 billion, people familiar with the matter have said. Inspire was formed by Roark Capital in 2018 as an owner, operator and franchisor of a portfolio of restaurant brands.