0001005150-99-000857 424B2 1 19991008 AES CORPORATION 0000874761 4991 541163725 DE 1231 424B2 33 333-81953 99725878 1001 N 19TH ST STE 2000 ARLINGTON VA 22209 7035221315 424B2 1 000100515099000857-001-seq1-424b2.txt FORM 424B2