Harvard Student Agencies | 4,463 followers on LinkedIn. The world's largest student-run company. | Founded in 1957, Harvard Student Agencies (HSA) is a non-profit that provides educational and business opportunities to students. HSA is the largest student-run company in the world, generating $13M in annual revenue across 10 business units and employing 800 students each year. HSA strives to defray the costs of education with student wages and inspire the next generation of business leaders.