Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statement (No. 333-41343) on Form S-8 of our report dated June 23, 2026, with respect to the financial statements and the supplemental schedule of SEI Capital Accumulation Plan.

/s/ KPMG LLP

Houston, Texas

June 23, 2026

11