Sun Communities : Supplemental Data June 30, 2023

Sun Communities, Inc.

Earnings Press Release & Supplemental Operating and Financial Data

For the Quarter and Year Ended June 30, 2023 and 2022

Forward-Looking Statements	Page
i
Earnings Press Release and Guidance	ii
Overview
Company Overview and Investor Information	1
Financial and Operating Highlights	2
Portfolio Overview	3
Financial Statements and Reconciliations to Non-GAAP Financial Measures
Consolidated Balance Sheets	4
Consolidated Statements of Operations	5
Reconciliation of Net Income Attributable to SUI Common Shareholders to Core FFO	6
Reconciliation of Net Income Attributable to SUI Common Shareholders to NOI	7
Reconciliation of Net Income Attributable to SUI Common Shareholders to Recurring EBITDA	8
Supplemental Disclosure
Real Property Operations - Total Portfolio	9
Real Property Operations - Same Property Portfolio	10
Other Operating Information
Home Sales Summary	13
Operating Statistics for MH and Annual RVs (excluding UK Operations)	13
Investment Activity
Acquisitions	14
Capital Expenditures and Investments	15
Capitalization
Capitalization Overview	16
Summary of Outstanding Debt	17
Debt Analysis	18
Definitions and Notes
Define and provide additional notes related to Non-GAAP financial measures and other capitalized terms	19

Sun Communities, Inc.

Earnings Press Release & Supplemental Operating and Financial Data

For the Quarter and Year Ended June 30, 2023 and 2022

Forward-Looking Statements:

This supplemental package contains various "forward-looking statements" within the meaning of the Securities Act of 1933, as amended (the "Securities Act"), and the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and Sun Communities, Inc. (the "Company") intends that such forward-looking statements will be subject to the safe harbors created thereby. For this purpose, any statements contained in this document that relate to expectations, beliefs, projections, future plans and strategies, trends or prospective events or developments and similar expressions concerning matters that are not historical facts are deemed to be forward- looking statements. Words such as "forecasts," "intends," "intend," "intended," "goal," "estimate," "estimates," "expects," "expect," "expected," "project," "projected," "projections," "plans," "predicts," "potential," "seeks," "anticipates," "anticipated," "should," "could," "may," "will," "designed to," "foreseeable future," "believe," "believes," "scheduled," "guidance," "target" and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these words. These forward-looking statements reflect the Company's current views with respect to future events and financial performance, but involve known and unknown risks and uncertainties, both general and specific to the matters discussed in this document some of which are beyond the Company's control. These risks and uncertainties may cause the Company's actual results to be materially different from any future results expressed or implied by such forward-looking statements. In addition to the risks described under "Risk Factors" contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2022 and in the Company's other filings with the Securities and Exchange Commission from time to time, such risks, uncertainties and other factors include those described under the heading "Cautionary Statement Regarding Forward-Looking Statements" in the accompanying press release.

Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date the statement was made. The Company undertakes no obligation to publicly update or revise any forward-looking statements included or incorporated by reference into this document, whether as a result of new information, future events, changes in the Company's expectations or otherwise, except as required by law.

Although the Company believes that the expectations reflected in the forward-looking statements are reasonable, the Company cannot guarantee future results, levels of activity, performance or achievements. All written and oral forward-looking statements attributable to the Company or persons acting on the Company's behalf are qualified in their entirety by these cautionary statements.

Note on Non-GAAP Measures:

This document includes information regarding various non-GAAP supplemental performance measures, including funds from operations ("FFO"), Core FFO, net operating income ("NOI"), earnings before interest, tax, depreciation and amortization ("EBITDA") and Recurring EBITDA. For information on these non-GAAP measures, please refer to "Reconciliation of Net Income Attributable to SUI Common Shareholders to Core FFO," "Reconciliation of Net Income Attributable to SUI Common Shareholders to NOI," "Reconciliation of Net Income Attributable to SUI Common Shareholders to Recurring EBITDA," and "Definitions and Notes."

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EARNINGS PRESS RELEASE

July 26, 2023

Sun Communities, Inc. Reports 2023 Second Quarter and Year-to-Date Results

Net Earnings per Diluted Share of $0.72 for the Quarter Increased by 18% Year-over-Year

Core FFO per Share of $1.96 for the Quarter, in line with Guidance

Same Property NOI Grew by 6.3% and 6.5%, for the Quarter and Year-to-Date over the 2022 Periods;

Strong Demand and Effective Expense Management Drove Outperformance

Same Property Adjusted Occupancy for MH and RV Increased by 170 Basis Points, Year-over-Year

Solid Transient-to-Annual RV Site Conversions of over 750 Sites

Revising Full-Year Core FFO per Share Guidance for 2023 to $7.09 - $7.23

Increasing Guidance for Total Same Property NOI Growth to 5.3% - 6.1%

Southfield, Michigan, July 26, 2023 - Sun Communities, Inc. (NYSE: SUI) (the "Company" or "SUI"), a real estate investment trust ("REIT") that owns and operates, or has an interest in, manufactured housing ("MH") and recreational vehicle ("RV") communities and marinas (collectively, the "properties"), today reported its second quarter results for 2023.

Financial Results for the Quarter and Six Months Ended June 30, 2023

• For the quarter ended June 30, 2023, net income attributable to common shareholders was $89.8 million, or $0.72 per diluted share, compared to net income attributable to common shareholders of $74.0 million, or $0.61 per diluted share for the same period in 2022, an 18% increase.
• For the six months ended June 30, 2023, net income attributable to common shareholders was $59.7 million, or $0.48 per diluted share, compared to net income attributable to common shareholders of $74.7 million, or $0.63 per diluted share, for the same period in 2022.

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Non-GAAP Financial Measures

• Core Funds from Operations ("Core FFO") for the quarter and six months ended June 30, 2023, were $1.96 per common share and dilutive convertible securities ("Share") and $3.19 per Share, respectively, representing 3.0% and 5.3% decreases as compared to the corresponding periods in 2022.
• Same Property Net Operating Income ("NOI") increased by 6.3% and 6.5% for the quarter and six months ended June 30, 2023, respectively, as compared to the corresponding period in 2022.

"We delivered strong second quarter results that were in line with our expectations, driven by the reliability of our real property operations which produce steady growth through economic cycles," said Gary A. Shiffman, Chairman, President and CEO. "This growth was demonstrated across each of our segments which possess sustained compelling market dynamics. In Manufactured Housing, we are pleased with our ability to outpace inflation rates in rental income, while also realizing a steady increase in occupancy levels. In our RV segment, we continued to successfully convert transient guests into annual residents at a record pace. Our outperformance in Marinas was primarily fueled by robust demand, as our members recognize the value of our industry-leading marina network. In the UK, where a more challenging macro environment is creating home sales headwinds, we continue to see strength in real property income generation. Overall, we remain highly confident in our ability to produce solid cash flow growth and generate value throughout our exceptional MH, RV and Marina portfolios."

OPERATING HIGHLIGHTS

North America Portfolio Occupancy

• Total MH and annual RV occupancy was 97.1% at June 30, 2023, as compared to 97.2% at June 30, 2022.
• During the quarter ended June 30, 2023, the number of MH and annual RV revenue producing sites increased by 1,039 sites, as compared to an increase of 950 sites during the corresponding period in 2022, a 9.4% increase.
• Transient-to-annualRV site conversions totaled over 750 sites during the second quarter of 2023 and account for 72.6% of the revenue producing site gains.

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