Item 4. Controls and Procedures

**a)**Disclosure controls and procedures. The Company’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934) as of the end of the period covered by this report. Based upon that evaluation, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of such period, the Company’s disclosure controls and procedures are effective.

**b)**Internal controls over financial reporting. No changes occurred in the Company’s internal control over financial reporting during the first quarter of 2026 that materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

PART II—OTHER INFORMATION

Item 1. Legal Proceedings.

Cboe incorporates herein by reference the discussion set forth in Note 21 (“Commitments, Contingencies, and Guarantees”) of the condensed consolidated financial statements included herein.

There have been no material updates during the period covered by this Form 10-Q to the Legal Proceedings as set forth in Item 3 of our Annual Report on Form 10-K for the year ended December 31, 2025.