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 2023 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 19 (“Income Taxes”) and Note 21 (“Commitments, Contingencies, and Guarantees”) of the condensed consolidated financial statements included herein.