Kellogg, General Mills and Frito-Lay co-manufacturer and Michigan bakery giant changes ownership 04-Aug-2022 By Gill Hyslop Roskam Baking Co. – one of the largest bakeries in the US, punching in over $600m in annual sales – is merging with better-for-you granola and snacks producer Organic Milling, following its acquisition by Entrepreneurial Equity Partners (e2p).