Interactive Brokers (IBKR) 10-K/A 2024 FY Annual report (amended)

EXHIBIT 31.1

CERTIFICATION

I, Milan Galik, certify that:

1.I have reviewed this Amendment No. 1 to this Annual Report on Form 10‑K/A for the year ended December 31, 2024 of Interactive Brokers Group, Inc.; 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.

By:	/s/ Milan Galik
	Name:	Milan Galik
	Title:	Chief Executive Officer and President

Date: March 4,  2025