SSB, the largest manufacturer and distributor of mattresses in … Serta Simmons Bedding, the nation's largest mattress company, combined all of their company’s locations into a new headquarters in Atlanta, Georgia. The new headquarters is located on a five-acre … The redevelopment of the former GM plant in Doraville is called … Serta Simmons was advised in the real estate deal by Jones Lang LaSalle Inc. Serta Simmons Bedding, LLC (SSB) manufactures bedding products. Serta Simmons Bedding (SSB) will officially open its new headquarters in Doraville at the site of the old General Motors Plant on Friday, May 3. Hendrick and Associates will design the headquarters’ interior. Serta Simmons Bedding to Consolidate Business in Single Headquarters Location SSB June 6th, 2017 Serta Simmons Bedding to Develop Mattress-In-A-Box Offerings for Its Leading Brands The Company offers blankets, sheets, bed frames, mattress protectors, and accessories.