FERC-566, Annual Report of a Utility's Twenty Largest Purchasers

Section 305(c)(2) of the Federal Power Act and 18 CFR 46.3 require each public utility, on or before January 31 of each calendar year, to publish a list of its 20 largest purchasers of electric energy. The list must include each entity that purchased (for purposes other than resale) one of the 20 largest annual amounts of electric energy sold by such public utility (or by any public utility which is part of the same holding company system) during any one of the three calendar years immediately preceding the filing date. The information collected allows the Commission to determine whether public or private interests will be adversely affected by business relationships between public utilities and their 20 largest purchasers of electricity.

The latest form for FERC-566, Annual Report of a Utility's Twenty Largest Purchasers expires 2027-10-31 and can be found here.