Curbline Properties Corp.

Evaluation of Disclosure and Control Procedures

The Company’s management, with the participation of the Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), conducted an evaluation of the effectiveness of the Company’s disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) as of September 30, 2025. Based on that evaluation, the CEO and CFO have concluded that the Company’s disclosure controls and procedures were effective as of the end of the period covered by this Quarterly Report on Form 10-Q to ensure that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms and were effective as of the end of such period to ensure that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is accumulated and communicated to the Company’s management, including its CEO and CFO, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

In August 2025, the Company completed the implementation of a new accounting software system. As part of this implementation, the Company updated its internal controls over financial reporting to address changes in business processes resulting from the new system. Management has evaluated the design and operating effectiveness of these updated controls and concluded that they are operating effectively.

Other than as noted above, there have not been any changes in the Company’s internal control over financial reporting during the three months ended September 30, 2025 that have materially affected, or are reasonably likely to materially affect the Company’s internal control over financial reporting.

PART II

OTHER INFORMATION