The “administrator” of an employee benefit plan is the individual or entity specifically designated in the plan documents as the administrator. If the plan documents do not designate an administrator, the administrator is the employer maintaining the plan, or, in the case of a plan maintained by more than one employer, the association, committee, joint board of trustees, or similar group representing the parties maintaining the plan. The name, address, and phone number of the plan administrator is required to be included in the plan’s summary plan description. The summary plan description is a document that the administrator is required to furnish to each participant and to each beneficiary receiving benefits. It summarizes the rights and benefits of participants and beneficiaries and the obligations of the plan.

Reference: [ERISA §§ 3(16), 102(b), 29 CFR § 2520.102-3(f); IRC § 414(g), Treas. Reg. § 1.414(g)-1]