Tenant demand for more flexible space options is forcing a dramatic shift in the office market as building owners adapt to occupier needs. In the U.S., the flexible space sector has grown at an average annual rate of 23% since 2010. That compares with just 1% average annual occupancy growth in the broader office market. Industry giants WeWork and IWG control approximately half of the flexible space market by rentable building area, but there are many other flexible space operators worldwide.