The Self-Insurance Institute of America, Inc. (SIIA) is the only national association dedicated exclusively to protecting and promoting the self-insurance/captive insurance industry. Membership constituencies include self-insured employers (healthcare and Workers' Compensation), group self-insured Workers' Compensation funds (SIFs), third-party administrators (TPAs), managing general underwriters (MGUs), excess/stop-loss insurance carriers, and a variety of other companies involved in the self-insurance/captive insurance industry.