SUN COMMUNITIES INC

Evaluation of disclosure controls and procedures

We maintain disclosure controls and procedures designed to ensure that information required to be disclosed in reports filed under the Exchange Act is recorded, processed, summarized and reported within the specified time periods and accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure. Any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives.

Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based upon this evaluation, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of March 31, 2026.

Changes in Internal Control over Financial Reporting

There were no changes in internal control over financial reporting during the quarter ended March 31, 2026, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II – OTHER INFORMATION

Legal Proceedings

We are involved in various legal proceedings. Refer to "Legal Proceedings - Class Action Litigation" and "Other Legal Proceedings" in Part I - Item 1 - Note 14, "Commitments and Contingencies," in our accompanying Notes to the Consolidated Financial Statements.

Environmental Matters

Item 103 of Regulation S-K requires disclosure of certain environmental matters when a governmental authority is a party to the proceedings and such proceedings involve potential monetary sanctions that we reasonably believe will exceed an applied threshold not to exceed $1.0 million. Applying this threshold, there are no environmental matters to disclose for the three months ended March 31, 2026.