0001193125-03-096296 8-K 2 20031218 12 7 20031218 SEI CORP 0000350894 6211 231707341 PA 1231 8-K 34 000-10200 031061638 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 6106761000 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 8-K 1 d8k.htm SEI INVESTMENTS COMPANY EX-99.1 3 dex991.htm PRESS RELEASE OF SEI INVESTMENTS COMPANY, DATED DECEMBER 16, 2003