EXHIBIT 31.2

CERTIFICATIONS

I, Dennis J. McGonigle, certify that:

1. I have reviewed this Amendment No. 1 to Annual Report on Form 10-K of SEI Investments Company; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

Date: February 22, 2024

/s/ Dennis J. McGonigle

Dennis J. McGonigle

Chief Financial Officer