Exhibit 2.1 MEMBERSHIP INTEREST PURCHASE AGREEMENT This Membership Interest Purchase Agreement (the "Agreement"), dated as of December 10, 1997, is by and among NRG Energy, Inc., a Delaware corporation ("NRG"); NRGG Funding Inc., a Delaware...Membership Interest Purchase Agreement • January 13th, 1998 • NRG Generating U S Inc • Cogeneration services & small power producers • Minnesota
