AIMA - The Alternative Investment Management Association | 40,995 followers on LinkedIn. AIMA is the world’s largest membership association for alternative investments managers. | AIMA is the world’s largest membership association for alternative investment managers. Its membership has more firms, managing more assets than any other industry body, and through our 10 offices located around the world, we serve over 2,000 members in 60 different countries. AIMA’s mission, which includes that of its private credit affiliate, the Alternative Credit Council (ACC), is to ensure that our industry of hedge funds, private market funds and digital asset funds is always best positioned for success.