Arup (officially Arup Group Limited) is a British multinational professional services firm headquartered in London which provides design, engineering, architecture, planning, and advisory services across every aspect of the built environment. The firm employs approximately 16,000 staff in over 90 offices across 35 countries around the world. Arup has participated in projects in over 160 countries. The ownership of Arup is structured as a trust. The beneficiaries of the trust are Arup's employees, both past and present, who receive a share of the firm's operating profit each year.