This industry comprises legal entities (i.e., funds, plans, and/or programs) organized to provide retirement income benefits exclusively for the sponsor's employees or members. Illustrative Examples: Employee benefit plans Retirement plans Pension funds and plans Cross-References. Establishments primarily engaged in-- ? Managing portfolios of pension funds--are classified in Industry 523920, Portfolio Management; and ? Initially underwriting annuities--are classified in U.S. Industry 524113, Direct Life Insurance Carriers.