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. An evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this Annual Report was made under the supervision and with the participation of our management, including our principal executive officer and principal financial officer.

Based upon this evaluation, our principal executive officer and principal financial officer have concluded that, as of December 31, 2023, our disclosure controls and procedures were not effective as of such date due to a material weakness in internal control over financial reporting, as described below.

Management's report on internal control over financial reporting

Our management is responsible for establishing and maintaining effective internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. This system is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of consolidated financial statements for external purposes in accordance with GAAP. Because of the inherent limitations of internal control over financial reporting, including the possibility of collusion or improper management override of controls, misstatements due to error or fraud may not be prevented or detected on a timely basis.

Our management performed an assessment of the effectiveness of our internal control over financial reporting as of December 31, 2023, utilizing the criteria discussed in the Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. The objective of this assessment was to determine whether our internal control over financial reporting was effective as of December 31, 2023. Based on management's assessment, we have concluded that our internal control over financial reporting was ineffective as of December 31, 2023, due to the material weakness described below.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis.

As of December 31, 2023, there was a material weakness relating to the design of management's review controls and failure to identify triggering events including reduced financial projections and increased interest rates, relevant to the evaluation of goodwill impairment relating to our Park Holidays business within the MH segment.

The effectiveness of our internal control over financial reporting has been audited by Grant Thornton LLP, an independent registered public accounting firm, as stated in its report included herein. This report contains an adverse opinion on the effectiveness of our internal control over financial reporting.

Plan for remediation of the material weakness

The Company and its Board of Directors are committed to maintaining a strong internal control environment. Management, with oversight from the Audit Committee of the Board of Directors, has begun developing a comprehensive plan to remediate the material weakness. Remediation efforts are focused on more rigorous policies and procedures and sufficiency of reviews for the Company's evaluation of goodwill for impairment. These efforts will include enhanced education and training from third party specialists, development of a continuous process for monitoring, assessment and communication, as well as involvement of additional key stakeholders in reviews.

We will not be able to conclude whether these efforts will fully remediate the material weakness until the updated controls have operated for a sufficient period of time and management has concluded, through testing, that such controls are operating effectively.

Changes in internal control over financial reporting

Except as discussed above, there were no changes in internal control over financial reporting during the quarter ended December 31, 2023, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.