IBKR · Interactive Brokers Group, Inc.

This 10-K/A represents Amendment No. 1 to Interactive Brokers Group, Inc.'s FY2025 annual report, filed on March 31, 2026, primarily to provide updated certifications from CEO and CFO under Sections 302 and 906 of the Sarbanes-Oxley Act. The explanatory note explicitly states no other changes were made to the original filing, and disclosures were not updated for post-filing events, underscoring this as a compliance-driven update rather than a substantive revision. This approach maintains continuity for investors, avoiding any reinterpretation of the underlying FY2025 financials while addressing post-audit regulatory formalities.

Deloitte & Touche LLP's audit opinion on internal control over financial reporting, dated February 27, 2026, confirms the Company's controls were effective as of December 31, 2025, under the COSO 2013 framework. This unqualified opinion, paired with their clean opinion on the consolidated financial statements, reassures investors of the integrity of IBKR's financial reporting amid its operations as a global electronic brokerage serving retail and institutional clients. The audit process involved risk assessments and testing of control design and operating effectiveness, highlighting disciplined governance in a high-volume trading environment prone to operational risks. Effective controls mitigate exposure to errors in trade execution, client fund segregation, and regulatory compliance, which are critical for maintaining client trust and avoiding penalties in competitive markets.

The absence of error corrections, restatements, or incentive compensation recovery analyses further bolsters confidence, signaling no material weaknesses or prior misstatements requiring remediation. This clean outcome reflects robust initial financial close processes and proactive audit collaboration, enabling IBKR to focus resources on core business growth rather than corrective actions. Signed by CFO Paul J. Brody, the amendment includes exhibits for the new certifications, closing the loop on regulatory requirements without introducing new financial insights or risks. Investors can view this filing as validation of ongoing compliance and control strength, reinforcing the reliability of the original 10-K's performance disclosures in a sector where transparency directly supports client acquisition and retention.