X0508 4 2023-07-27 0000350894 SEI INVESTMENTS CO SEIC 0001191733 WITHROW WAYNE 1 FREEDOM VALLEY DRIVE OAKS PA 19456 true Executive Vice President false Common Stock 2023-07-27 4 M 0 10000 33.76 A 65399 D Common Stock 2023-07-27 4 S 0 10000 62.74 D 55399 D Option to Purchase Common Stock 33.76 2023-07-27 4 M 0 10000 D 2015-12-31 2023-12-10 Common Stock 10000 20000 D Represents the weighted average of a range of sale prices from $62.70 to $62.86. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. Received as employment compensation. /s/ Wayne Withrow, by John Munch, attorney in fact 2023-07-31