0001193125-03-037301 10-Q 5 20030630 20030814 SEI CORP 0000350894 6211 231707341 PA 1231 10-Q 34 000-10200 03844398 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 6106761000 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 10-Q 1 d10q.htm SEI CORP--FORM 10-Q EX-31.1 3 dex311.htm CEO CERTIFICATION EX-31.2 4 dex312.htm CFO CERTIFICATION EX-32.1 5 dex321.htm CERTIFICATION EX-32.2 6 dex322.htm CERTIFICATION