SUN COMMUNITIES INC

During the three months ended June 30, 2025, none of our officers or directors, as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, adopted, modified, orterminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement, as defined in Item 408 of Regulation S-K.

On July 4, 2025, the One Big Beautiful Bill Act ("OBBBA") was signed into law. The OBBBA made significant changes to the U.S. federal income tax laws in various areas. Among the notable changes, the OBBBA permanently extended certain provisions that were enacted in the Tax Cuts and Jobs Act of 2017, most of which were set to expire after December 31, 2025. As a result of such extensions, individuals and other non-corporate taxpayers will continue to be entitled to a 20% deduction for certain “qualified REIT dividends” for taxable years after 2025, subject to certain requirements, and the maximum U.S. federal income tax rate on ordinary income for individuals and other non-corporate taxpayers will continue to be 37% after 2025 (before application of the 3.8% Medicare tax on “net investment income”). In addition, the OBBBA also increased the percentage limit under the REIT asset test applicable to securities of one or more taxable REIT subsidiaries from 20% to 25% for 2026 and subsequent taxable years. You are urged to consult with your own tax advisor to determine the effects of the OBBBA and the ownership and disposition of our securities or debt securities of the Operating Partnership on your individual tax situation, including any state, local or non-U.S. tax consequences.