HOUSTON-Direct Energy has expanded its global headquarters at Twelve Greenway Plaza to 93,593 square feet, an increase of 21,023 square feet. The company, which is North America’s largest competitive retailer of energy and energy-related services, inked a seven-year renewal for the class A office space.

Direct Energy has been a tenant in Greenway Plaza since 2001, according to Warren Savery, vice president of leasing for Crescent Real Estate Holdings LLC. He and Bubba Harkins, also with Crescent, represented the owner, Crescent Crown Greenway Plaza SVP LLC. Sue Rogers and Steven Heal of CresaPartners’ local office represented Direct Energy.

“Direct Energy has been a tremendous success story,” Savery says. “They started off as a 4,000-square-foot subtenant in Eight Greenway Plaza, as they grew, they relocated to Twelve Greenway Plaza and now they’re the largest tenant in that building, occupying more than five floors.”