0001193125-03-007402 10-Q/A 3 20030331 20030530 SEI CORP 0000350894 6211 231707341 PA 1231 10-Q/A 34 000-10200 03726376 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 6106761000 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 10-Q/A 1 d10qa.htm FORM 10Q/A EX-99.2 3 dex992.htm CERTIFICATION OF CEO EX-99.3 4 dex993.htm CERTIFICATION OF CFO