SUI / Sun Communities, Inc. - Pemfailan SEC, Laporan Tahunan, Penyata Proksi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: September 3, 2025 (Date of earliest event reported) SUN COMMUNITIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: September 3, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

Se pt em be r 2 02 5 WAVERLY SHORES VILLAGE – HOLLAND, MI Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-Looking Statements 2 This presentation has been prepared for informational purposes only from inf

a2q2025ipx09032025xfina Se pt em be r 2 02 5 WAVERLY SHORES VILLAGE – HOLLAND, MI Sun Communities, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 ☐ TRANSITION REPORT PURSUANT TO S

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-12616 SUN COMMUNITIES, INC (E

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 29, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of July 31, 2025, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 30, 2025 (Date of earliest event reported) SUN COMMUNITIES, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 30, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) Commission File Nu

Sun Communities, Inc. For the Quarter and Six Months Ended June 30, 2025

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarter and Six Months Ended June 30, 2025 Page Forward-Looking Statements 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 Cons

among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Charles D. Young

EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this “Agreement”), effective as of July 20, 2025 (the “Effective Date”), by and among SUN COMMUNITIES, INC.

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 20, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Source: Sun Communities, Inc. July 23, 2025 16:20 ET Sun Communities, Inc. Announces CEO Transition Charles D. Young Appointed Chief Executive Officer and Appointed to the Board of Directors, Effective October 1, 2025; Gary A. Shiffman to Transition

Source: Sun Communities, Inc. July 23, 2025 16:20 ET Sun Communities, Inc. Announces CEO Transition Charles D. Young Appointed Chief Executive Officer and Appointed to the Board of Directors, Effective October 1, 2025; Gary A. Shiffman to Transition to Non-Executive Chairman of the Board Southfield, Michigan, July 23, 2025 (GLOBE NEWSWIRE) - Sun Communities, Inc. (NYSE: SUI) (“Sun” or the “Company

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: June 2, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Ju ne 2 02 5 CHERRYWOOD – CLINTON, NY Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-Looking Statements 2 This presentation has been prepared for informational purposes only from information supplied by

a1q2025ipx06022025xfina Ju ne 2 02 5 CHERRYWOOD – CLINTON, NY Sun Communities, Inc.

Fifth Amended and Restated Bylaws

FIFTH AMENDED AND RESTATED BYLAWS OF SUN COMMUNITIES, INC. ARTICLE I CHARTER AND OFFICES Section 1.CHARTER. These bylaws (these “Bylaws”) shall be subject to the terms of the charter (the “Charter”), as from time to time in effect, of Sun Communities, Inc. (the “Corporation”). Section 2.PRINCIPAL OFFICE. The principal office of the Corporation shall be located at such place or places as the Board

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 13, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Sun Communities, Inc. Unaudited Pro Forma Condensed Consolidated Financial Statements

Sun Communities, Inc. Unaudited Pro Forma Condensed Consolidated Financial Statements On April 30, 2025 (the “Closing Date”), Sun Communities, Inc. (the “Company”) completed the initial closing of the previously announced sale of Safe Harbor Marinas, LLC and SHM TRS, LLC (collectively, “Safe Harbor”). As previously disclosed in the Current Report on Form 8-K filed by the Company with the Securitie

Sun Communities, Inc. Completes Sale of Safe Harbor Marinas to Blackstone Infrastructure April 30, 2025 Southfield, MI, April 30, 2025 (GLOBE NEWSWIRE) -- Sun Communities, Inc. (NYSE: SUI) (the "Company" or “Sun”), a real estate investment trust (“RE

Sun Communities, Inc. Completes Sale of Safe Harbor Marinas to Blackstone Infrastructure April 30, 2025 Southfield, MI, April 30, 2025 (GLOBE NEWSWIRE) - Sun Communities, Inc. (NYSE: SUI) (the "Company" or “Sun”), a real estate investment trust (“REIT”) that owns and operates or has an interest in manufactured housing (MH) and recreational vehicle (RV) communities, today announced that it has comp

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-12616 SUN COMMUNITIES, INC (

Regulation FD Disclosure, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 30, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employe

Sun Communities Announces Full Redemption of 5.500% Senior Notes due 2029 and 5.700% Senior Notes due 2033 April 30, 2025 Southfield, MI, April 30, 2025 (GLOBE NEWSWIRE) -- Sun Communities, Inc. (NYSE: SUI) (the “Company”) today announced that its op

Sun Communities Announces Full Redemption of 5.500% Senior Notes due 2029 and 5.700% Senior Notes due 2033 April 30, 2025 Southfield, MI, April 30, 2025 (GLOBE NEWSWIRE) - Sun Communities, Inc. (NYSE: SUI) (the “Company”) today announced that its operating partnership, Sun Communities Operating Limited Partnership (“SCOLP”), will redeem all $500 million aggregate principal amount of its outstandin

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of May 06, 2025, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

Sun Communities, Inc. For the Quarters Ended March 31, 2025 and 2024

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarters Ended March 31, 2025 and 2024 Page Forward-Looking Statements 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 Consolid

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 5, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) Commission File Numb

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: ☐ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2) þ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to ss.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: ☐ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2) ☐ Definitive Proxy Statement þ Definitive Additional Materials ☐ Soliciting Material Pursuant to ss.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: þ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2) ☐ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to ss.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 17, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employe

Membership Interest Purchase Agreement, dated as of February 24, 2025, by and among Safe Harbor Marinas, LLC, SHM TRS, LLC, Sun Communities Operating Limited Partnership, Sun Home Services, Inc., BIP Poseidon Holdco L.P., Consent NewCo, LLC and Consent TRS NewCo, LLC

MEMBERSHIP INTEREST PURCHASE AGREEMENT, dated as of February 24, 2025, by and among SAFE HARBOR MARINAS, LLC, SHM TRS, LLC, SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, SUN HOME SERVICES, INC.

List of Subsidiaries of Sun Communities, Inc.

SUN COMMUNITIES, INC. Exhibit 21.1 – List of Subsidiaries Main operating subsidiary: Sun Communities Operating Limited Partnership, a Michigan limited partnership Other subsidiaries: 481 Associates, a Florida general partnership 1008 Tuscany, LLC, a Mississippi limited liability company AIOP Brentwood West, L.L.C., a Delaware limited liability company AIOP Florida Properties I, L.L.C., a Delaware

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 Commission file number: 1-12616 SUN COM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 Commission file number: 1-12616 SUN COMMUNITIES, INC (Exact Name of Registrant as Specified in its Charter) Maryland 38-2730780 (State of Incorporation) (I.R.S. Employer Identification No.)

List issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of February 28, 2025, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

Sun Communities, Inc. Amended & Restated Non-Employee Directors Deferred Compensation Plan

Sun Communities, Inc. Amended and Restated Non-Employee Directors Deferred Compensation Plan Adopted December 13 , 2024 1. Establishment of Plan. Sun Communities, Inc. (the “Company”) amends and restates its unfunded deferred compensation plan for certain members of the Board of Directors (each a “Director,” and collectively the “Directors”) of the Company, which shall be known as the Sun Communit

Fe br ua ry 2 02 5 RIVERSIDE CLUB – RUSKIN, FL Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-Looking Statements 2 This presentation has been prepared for informational purposes only from information su

Fe br ua ry 2 02 5 RIVERSIDE CLUB – RUSKIN, FL Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-Looking Statements 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Company,” and from third-party sources indicated herein. Such thir

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 27, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

Sun Communities, Inc. For the Quarters and Years Ended December 31, 2024 and 2023

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarters and Years Ended December 31, 2024 and 2023 Page Forward-Looking Statements 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 Meas

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 26, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) Commission Fil

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 24, 2025 (Date of earliest event reported) SUN COMMUNITIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 24, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission F

SUN COMMUNITIES, INC. ANNOUNCES SALE OF SAFE HARBOR MARINAS TO BLACKSTONE INFRASTRUCTURE IN AN ALL-CASH TRANSACTION FOR $5.65 BILLION Strategically Repositions Company as a Pure-Play MH and RV Focused REIT Enhances Flexibility Through Substantial De-

Exhibit 99.1 SUN COMMUNITIES, INC. ANNOUNCES SALE OF SAFE HARBOR MARINAS TO BLACKSTONE INFRASTRUCTURE IN AN ALL-CASH TRANSACTION FOR $5.65 BILLION Strategically Repositions Company as a Pure-Play MH and RV Focused REIT Enhances Flexibility Through Substantial De-Leveraging and Improves Margin and Cash Flow Profile Southfield, MI, Feb. 24, 2025 – Sun Communities, Inc. (NYSE: SUI) (the “Company” or

Code of Conduct and Business Ethics

Sun Communities, Inc Code of Conduct & Business Ethics I.Code of Conduct Sun Communities, Inc. (the “Company” or “Sun”) seeks to conduct its business in accordance with the highest standards of honest and ethical conduct and in compliance with applicable laws, rules and regulations. This Code of Business Conduct and Ethics (the “Code”) governs the business decisions made and actions taken by the C

Form of Indemnification Agreement

INDEMNIFICATION AGREEMENT THIS INDEMNIFICATION AGREEMENT (“Agreement”) is made and entered into as of the day of , (the “Effective Date”), by and between Sun Communities, Inc.

SUN COMMUNITIES, INC. Insider Trading Policy

SUN COMMUNITIES, INC. Insider Trading Policy 1.Introduction In the course of performing duties for Sun Communities, Inc. and its subsidiaries (the “Company,” “we” or “us”), our directors, officers and employees may, at times, have information about us or another company that is not generally available to the public. Because of this relationship with the Company, if you are aware of material nonpub

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 13, 2025 (Date of earliest event reported) SUN COMMUNITIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 13, 2025 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: December 11, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: November 5, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emplo

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 ☐ TRANSITION REPORT PURSUANT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-12616 SUN COMMUNITIES, I

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of November 07, 2024, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and John B. McLaren dated November 6, 2024

EX-10.1 2 employmentagreement-mclare.htm EX-10.1 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this “Agreement”) is made and entered into as of November 6, 2024 (the “Effective Date”), by and among SUN COMMUNITIES, INC., a Maryland corporation (the “REIT”), SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (“SCOLP”) and JOHN B. McLAREN (the “Executive”). As used herei

1

Sun Communities, Inc. CEO Succession Planning Committee Charter General Statement of Purpose The purpose of the CEO Succession Planning Committee (the “Committee”) of the Board of Directors (the “Board”) of Sun Communities, Inc. (the “Company”) is to assist the Board in succession planning for the position of chief executive officer (the “CEO”) of the Company. Composition The number of individuals

Restricted Stock Award Agreement dated November 6, 2024 by and between Sun Communities, Inc. and John B. McLaren

SUN COMMUNITIES, INC. EQUITY INCENTIVE PLAN RESTRICTED STOCK AWARD AGREEMENT Sun Communities, Inc., a Maryland corporation (the “Company”), upon the recommendation of the Compensation Committee of the Company's Board of Directors and pursuant to that certain 2015 Equity Incentive Plan (the “Plan”) adopted by the Company's Board of Directors and approved by its shareholders on July 20, 2015, as ame

COUNTRY MEADOWS VILLAGE – CALDONIA, MI Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-Looking Statements 2 This presentation has been prepared for informational purposes only from information supplied b

COUNTRY MEADOWS VILLAGE – CALDONIA, MI Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-Looking Statements 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Company,” and from third-party sources indicated herein. Such third-party

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: November 6, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emplo

Sun Communities, Inc. For the Quarter and Nine Months Ended September 30, 2024 and 2023

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarter and Nine Months Ended September 30, 2024 and 2023 Page Forward-Looking Statements 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 Financia

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: November 6, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) Commission File

Unregistered Sales of Equity Securities

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: September 30, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emp

COLONY IN THE WOOD – PORT ORANGE, FL Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-looking Statements 2 This presentation has been prepared for informational purposes only from information supplied by

COLONY IN THE WOOD – PORT ORANGE, FL Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-looking Statements 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Company,” and from third-party sources indicated herein. Such third-party in

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: September 5, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of August 01, 2024, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 ☐ TRANSITION REPORT PURSUANT TO S

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-12616 SUN COMMUNITIES, INC (E

Sun Communities, Inc. For the Quarter and Six Months Ended June 30, 2024 and 2023

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarter and Six Months Ended June 30, 2024 and 2023 Page Forward-Looking Statements 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 Meas

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 31, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) Commission File Nu

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: June 3, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Ju ne 2 02 4 FRIENDLY VILLAGE OF SIMI – SIMI VALLEY, CA Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-looking Statements 2 This presentation has been prepared for informational purposes only from infor

Ju ne 2 02 4 FRIENDLY VILLAGE OF SIMI – SIMI VALLEY, CA Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-looking Statements 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Company,” and from third-party sources indicated herein.

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 14, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

2,318,901 Shares of Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(7) Registration No. 333-278371 PROSPECTUS SUPPLEMENT (To Prospectus Dated March 29, 2024) 2,318,901 Shares of Common Stock This prospectus supplement relates to the offer and sale from time to time by the selling shareholders identified herein of up to 2,318,901 shares of Sun Communities, Inc. common stock, par value $0.01 per share. We refer to the

Calculation of Filing Fee Tables (Form Type) Sun Communities, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables 424B7 (Form Type) Sun Communities, Inc.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 7, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer I

M ay 2 02 4 DESERT HARBOR – APACHE JUNCTION, AZ Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-looking Statements 2 This presentation has been prepared for informational purposes only from information s

M ay 2 02 4 DESERT HARBOR – APACHE JUNCTION, AZ Sun Communities, Inc. (NYSE: SUI) Investor Presentation Cautionary Statement Regarding Forward-looking Statements 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Company,” and from third-party sources indicated herein. Such thi

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 7, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission File Nu

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 3, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission File Nu

Amendment No. 2 to At the Market Sales Offering Agreement, dated May 3, 2024

Exhibit 1.1 Execution Version SUN COMMUNITIES, INC. Amendment No. 2 To At the Market Offering Sales Agreement May 3, 2024 BMO Capital Markets Corp. 151 W 42nd Street New York, New York 10036 Bank of Montreal 55 Bloor Street West, 18th Floor Toronto, Ontario M5X 1A1 Canada BofA Securities, Inc. One Bryant Park New York, New York 10036 Bank of America, N.A. One Bryant Park New York, New York 10036 C

Up to $1,089,458,261 Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-278371 PROSPECTUS SUPPLEMENT (To Prospectus dated March 29, 2024) Up to $1,089,458,261 Common Stock We and our operating partnership, Sun Communities Operating Limited Partnership, have entered into an At the Market Offering Sales Agreement, as amended, or the sales agreement, relating to the issuance and sale of shares of our

CALCULATION OF FILING FEE TABLE (Form type) Sun Communities, Inc. (Exact name of Registrant as specified in its charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered 

Exhibit 107 CALCULATION OF FILING FEE TABLE 424(b)(5) (Form type) Sun Communities, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 ☐ TRANSITION REPORT PURSUANT TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-12616 SUN COMMUNITIES, INC (

May 2, 2024

May 2, 2024 VIA EDGAR Division of Corporation Finance Office of Real Estate and Construction United States Securities and Exchange Commission Washington, D.

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of May 02, 2024, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 29, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) Commission File N

Sun Communities, Inc. For the Quarters Ended March 31, 2024 and 2023

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarters Ended March 31, 2024 and 2023 Page Forward-Looking Statements 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 Consolid

Unregistered Sales of Equity Securities

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 1, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: ☐ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2) þ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to ss.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: o Preliminary Proxy Statement o CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2) o Definitive Proxy Statement þ Definitive Additional Materials o Soliciting Material Pursuant to ss.

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables S-3ASR (Form Type) Sun Communities, Inc.

Restated Certificate of Limited Partnership of Sun Communities Operating Limited Partnership

Exhibit 3.4 State of Michigan RESTATED CERTIFICATE OF LIMITED PARTNERSHIP For use by Domestic Limited Partnerships The following Restated Certificate of Limited Partnership supersedes the original Certificate of Limited Partnership as amended, and shall be the Certificate of Limited Partnership for the Limited Partnership: Section 1 The name of the limited partnership is: Sun Communities Operating

Opinion of Hunton Andrews Kurth LLP

EX-5.3 Exhibit 5.3 HUNTON ANDREWS KURTH LLP 600 TRAVIS, SUITE 4200 HOUSTON, TEXAS 77002-2929 TEL 713 • 220 • 4200 FAX 713 • 220 • 4285 March 29, 2024 Sun Communities, Inc. Sun Communities Operating Limited Partnership 27777 Franklin Road Suite 300 Southfield, Michigan 48034 Re: Registration Statement on Form S-3 filed with the U.S. Securities and Exchange Commission. Ladies and Gentlemen: We have

Form T-1 Statement of Eligibility under the Trust Indenture Act of 1939

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) UMB BANK, NATIONAL ASSOCIATION (Exact name of trustee as specified in its charter) 44-0194180 I.R.S. Em

As filed with the Securities and Exchange Commission on March 29, 2024

Table of Contents As filed with the Securities and Exchange Commission on March 29, 2024 Registration No.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 15, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employe

First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Fernando Castro-Caratini dated March 20, 2024

FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (this “Amendment”) is made and entered into as of March 20, 2024 (the “Effective Date”), by and among SUN COMMUNITIES, INC.

SUN COMMUNITIES, INC. Insider Trading Policy

SUN COMMUNITIES, INC. Insider Trading Policy 1. Introduction In the course of performing duties for Sun Communities, Inc. and its subsidiaries (the “Company,” “we” or “us”), our directors, officers and employees may, at times, have information about us or another company that is not generally available to the public. Because of this relationship with the Company, if you are aware of material nonpu

First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Marc Farrugia dated March 20, 2024

FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (this “Amendment”) is made and entered into as of March 20, 2024 (the “Effective Date”), by and among SUN COMMUNITIES, INC.

Third Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Bruce Thelen dated March 20, 2024

THIRD AMENDMENT TO EMPLOYMENT AGREEMENT THIS THIRD AMENDMENT TO EMPLOYMENT AGREEMENT (this “Amendment”) is made and entered into as of March 20, 2024 (the “Effective Date”), by and among SUN COMMUNITIES, INC.

M ar ch 2 02 4 Sun Communities, Inc. (NYSE: SUI) Investor Presentation CHERRYWOOD – CLINTON, NY Cautionary Statement Regarding Forward-looking Statements 2 This presentation has been prepared for informational purposes only from information supplied

sui4q2023ip03012024 M ar ch 2 02 4 Sun Communities, Inc. (NYSE: SUI) Investor Presentation CHERRYWOOD – CLINTON, NY Cautionary Statement Regarding Forward-looking Statements 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Company,” and from third-party sources indicated here

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 1, 2024 (Date of earliest event reported) SUN COMMUNITIES, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 1, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Sun Communities Inc. Executive Compensation Recovery (Clawback) Policy

Sun Communities, Inc. Executive Compensation Recovery (Clawback) Policy Sun Communities, Inc. (the “Company”) and the Company’s Board of Directors (the “Board”) believe that it is in the best interests of the Company and its shareholders to create and maintain a culture that emphasizes integrity and accountability and that reinforces the Company's pay-for-performance compensation philosophy. The B

Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Marc Farrugia dated June 13, 2022

4860-7527-9629 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this “Agreement”) is made and entered into on June 13, 2022 (the “Effective Date”), by and among SUN COMMUNITIES, INC.

List issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of February 27, 2024, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

List of Subsidiaries of Sun Communities, Inc.

SUN COMMUNITIES, INC. Exhibit 21.1 – List of Subsidiaries Main operating subsidiary: Sun Communities Operating Limited Partnership, a Michigan limited partnership Other subsidiaries: 481 Associates, a Florida general partnership 1008 Tuscany, LLC, a Mississippi limited liability company AIOP Brentwood West, L.L.C., a Delaware limited liability company AIOP Florida Properties I, L.L.C., a Delaware

Form of Restricted Stock Award Agreement For Executives

SUN COMMUNITIES, INC. EQUITY INCENTIVE PLAN RESTRICTED STOCK AWARD AGREEMENT Sun Communities, Inc., a Maryland corporation (the “Company”), upon the recommendation of the Compensation Committee of the Company's Board of Directors and pursuant to that certain 2015 Equity Incentive Plan (the “Plan”) adopted by the Company's Board of Directors and approved by its shareholders on July 20, 2015, as ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 Commission file number: 1-12616 SUN COM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 Commission file number: 1-12616 SUN COMMUNITIES, INC (Exact Name of Registrant as Specified in its Charter) Maryland 38-2730780 (State of Incorporation) (I.R.S. Employer Identification No.)

Financial Statements and Exhibits, Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 15, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) Commission Fil

Sun Communities, Inc. For the Quarters and Years Ended December 31, 2023 and 2022

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarters and Years Ended December 31, 2023 and 2022 Page Forward-Looking Statements 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 Meas

Cooperation Agreement, dated February 15, 2024, by and between Sun Communities, Inc. and Land & Buildings Investment Management LLC.

Exhibit 10.1 COOPERATION AGREEMENT This Cooperation Agreement (this “Agreement”) is made and entered into as of February 15, 2024 by and between SUN COMMUNITIES, INC., a Maryland corporation (the “Company”), and LAND & BUILDINGS INVESTMENT MANAGEMENT LLC, a Delaware limited liability company (“L&B Management” and together with its Affiliates (as defined below), the “L&B Parties”), with respect to

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 15, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

Web Sun Communities, Inc. Appoints Jerry Ehlinger and Craig Leupold to Board of Directors Enters Into Cooperation Agreement with Land & Buildings Your publication date and time will appear here. | Source: Sun Communities, Inc. Southfield, MI, Feb. 16

Exhibit 99.1 Web Sun Communities, Inc. Appoints Jerry Ehlinger and Craig Leupold to Board of Directors Enters Into Cooperation Agreement with Land & Buildings Your publication date and time will appear here. | Source: Sun Communities, Inc. Southfield, MI, Feb. 16, 2024 (GLOBE NEWSWIRE) — Sun Communities, Inc. (NYSE: SUI) (the “Company” and “Sun”) announced today that Jerry Ehlinger and Craig A. Le

SUI / Sun Communities, Inc. / COHEN & STEERS, INC. Passive Investment

SC 13G/A 1 sui13gbody-123123.htm SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (AMENDMENT NO. 4)* Sun Communities Inc (Name of Issuer) Common Stock (Title of Class of Securities) 866674104 (CUSIP Number) December 31, 20

SUI / Sun Communities, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv02014-suncommunitiesinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 18)* Name of issuer: Sun Communities Inc Title of Class of Securities: Common Stock CUSIP Number: 866674104 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to desig

Consent of Taft Stettinius & Hollister LLP (Included in Exhibit 5.3)

Exhibit 5.3 27777 Franklin Road, Suite 2500 Southfield, Michigan 48034-8214 Tel: 248.351.3000 | Fax: 248.351.3082 January 11, 2024 Sun Communities, Inc. Sun Communities Operating Limited Partnership 27777 Franklin Road Suite 300 Southfield, MI 48034 Attention: Board of Directors Ladies and Gentlemen: We have acted as Michigan counsel to Sun Communities Operating Limited Partnership, a Michigan lim

Fifth Supplemental Indenture, dated as of January 11, 2024 by and among Sun Communities Operating Limited Partnership, Sun Communities, Inc., and UMB Bank, N.A. as trustee.

Exhibit 4.2 SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP as the Company SUN COMMUNITIES, INC. as Guarantor and UMB BANK, N.A. as Trustee FIFTH SUPPLEMENTAL INDENTURE Dated as of January 11, 2024 to INDENTURE Dated as of June 28, 2021 5.500% SENIOR NOTES DUE 2029 TABLE OF CONTENTS Page ARTICLE ONE Relation to Indenture; Definitions 1 SECTION 1.01. Relation to Indenture. 1 SECTION 1.02. Definitions

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: January 11, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emplo

$500,000,000 Sun Communities Operating Limited Partnership 5.500% Senior Notes due 2029 Fully and Unconditionally Guaranteed by Sun Communities, Inc.

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-255020 Registration No. 333-255020-01 PROSPECTUS SUPPLEMENT (To Prospectus dated April 2, 2021) $500,000,000 Sun Communities Operating Limited Partnership 5.500% Senior Notes due 2029 Fully and Unconditionally Guaranteed by Sun Communities, Inc. Sun Communities Operating Limited Partnership, or the Operating Partnership, is of

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: January 4, 2024 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employ

Calculation of Filing Fee Tables (Form Type) SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Tables 424(b)(5) (Form Type) SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities The prospectus supplement to which this Exhibit is attached is a final prospectus for the related offerings.

Underwriting Agreement dated January 4, 2024 by and among Sun Communities, Inc., Sun Communities Operating Limited Partnership, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and BofA Securities, Inc.

Sun Communities, Inc. $500,000,000 5.500% Senior Notes due 2029 Underwriting Agreement New York, New York January 4, 2024 Citigroup Global Markets Inc. J.P. Morgan Securities LLC BofA Securities, Inc. As Representatives of the several Underwriters named in Schedule I hereto c/o Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 c/o J.P. Morgan Securities LLC 383 Madison Av

Sun Communities, Inc. Prices $500 Million of Senior Notes January 4, 2024 Southfield, MI, Jan. 04, 2024 (GLOBE NEWSWIRE) -- Sun Communities, Inc. (NYSE: SUI) (the “Company”), a real estate investment trust (“REIT”) that owns and operates, or has an i

Sun Communities, Inc. Prices $500 Million of Senior Notes January 4, 2024 Southfield, MI, Jan. 04, 2024 (GLOBE NEWSWIRE) - Sun Communities, Inc. (NYSE: SUI) (the “Company”), a real estate investment trust (“REIT”) that owns and operates, or has an interest in, manufactured housing and recreational vehicle communities and marinas, today announced that its operating partnership, Sun Communities Oper

Pricing Term Sheet January 4, 2024 Sun Communities Operating Limited Partnership $500,000,000 5.500% Senior Notes due 2029 Fully and Unconditionally Guaranteed by Sun Communities, Inc. Issuer: Sun Communities Operating Limited Partnership Guarantor:

Issuer Free Writing Prospectus Filed Pursuant to Rule 433 Registration Nos. 333-255020; 333-255020-01 Relating to Preliminary Prospectus Supplement dated January 4, 2024 to Prospectus dated April 2, 2021 Pricing Term Sheet January 4, 2024 Sun Communities Operating Limited Partnership $500,000,000 5.500% Senior Notes due 2029 Fully and Unconditionally Guaranteed by Sun Communities, Inc. Issuer: Sun

SUBJECT TO COMPLETION, DATED JANUARY 4, 2024

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-255020 Registration No. 333-255020-01 This preliminary prospectus supplement relates to an effective registration statement under the Securities Act of 1933, as amended, but is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: December 31, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

Twelfth Amendment to Agreement of Limited Partnership of Sun Communities Operating Limited Partnership, dated December 31, 2023

TWELFTH AMENDMENT TO THE FOURTH AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP This TWELFTH Amendment to the Fourth Amended and Restated agreement of Limited Partnership of Sun Communities Operating Limited Partnership (this “Amendment”) is made and entered into on December 31, 2023 (“Effective Date”), by SUN COMMUNITIES, INC.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: November 13, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) NOVEMBER 2023 WILLOW CROSSING – FORT LUPTON, CO 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “o

SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) NOVEMBER 2023 WILLOW CROSSING – FORT LUPTON, CO 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPORT PURSUANT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-12616 SUN COMMUNITIES, I

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of October 26, 2023, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

Sun Communities, Inc. For the Quarter and Nine Months Ended September 30, 2023 and 2022

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarter and Nine Months Ended September 30, 2023 and 2022 Page Forward-Looking Statements 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 Financia

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: October 25, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employ

SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) SEPTEMBER 2023 CHERRYWOOD – CLINTON, NY 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Su

SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) SEPTEMBER 2023 CHERRYWOOD – CLINTON, NY 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: September 7, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023. ☐ TRANSITION REPORT PURSUANT TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023. or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of July 27, 2023, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

Sun Communities, Inc. For the Quarter and Year Ended June 30, 2023 and 2022

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarter and Year Ended June 30, 2023 and 2022 Page Forward-Looking Statements 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 C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 26, 2023 (Date of earliest event reported) SUN COMMUNITIES, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 26, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

SUI / Sun Communities, Inc. / COHEN & STEERS, INC. Passive Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (AMENDMENT NO. 3)* Sun Communities Inc (Name of Issuer) Common Stock (Title of Class of Securities) 866674104 (CUSIP Number) June 30, 2023 (Date of Event Which Requires Fili

SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) JUNE 2023 LAKESIDE CROSSING – CONWAY, SC 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “S

a1q2023ipx062023 SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) JUNE 2023 LAKESIDE CROSSING – CONWAY, SC 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: June 5, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 16, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Sun Communities, Inc. Articles of Amendment effective May 18, 2023

SUN COMMUNITIES, INC. ARTICLES OF AMENDMENT Sun Communities, Inc., a Maryland corporation (the “Corporation”), having its principal office in the State of Maryland in Baltimore, Maryland, hereby certifies to the State Department of Assessments and Taxation of Maryland (which is hereinafter referred to as the “SDAT”), that: FIRST: The charter of the Corporation is hereby amended by increasing the n

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of April 27, 2023, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023. ☐ TRANSITION REPORT PURSUANT TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023. or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1

Sun Communities, Inc. For the Quarters Ended March 31, 2023 and 2022

Sun Communities, Inc. Earnings Press Release & Supplemental Operating and Financial Data For the Quarters Ended March 31, 2023 and 2022 Page Earnings Press Release and Guidance i 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 Consolid

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 26, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employe

Calculation of Filing Fee Tables (Form Type) Sun Communities, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

EX-FILING FEES 2 d475038dexfilingfees.htm EX-FILING FEES Exhibit 107 EX-FILING FEES Calculation of Filing Fee Tables 424B7 (Form Type) Sun Communities, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee

588,236 Shares of Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(7) Registration No. 333-255020 PROSPECTUS SUPPLEMENT (To Prospectus Dated April 2, 2021) 588,236 Shares of Common Stock This prospectus supplement relates to the offer and sale from time to time by the selling stockholders identified herein of up to 588,236 shares of Sun Communities, Inc. common stock, par value $0.01 per share. We refer to the share

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 5, 2023 (Date of earliest event reported) SUN COMMUNITIES, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 5, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: o Preliminary Proxy Statement o CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2) o Definitive Proxy Statement þ Definitive Additional Materials o Soliciting Material Pursuant to ss.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: ☐ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2) þ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to ss.

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 23, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employe

Eleventh Amendment to Agreement of Limited Partnership of Sun Communities Operating Limited Partnership, dated March 23, 2023

ELEVENTH AMENDMENT TO THE FOURTH AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP This Eleventh Amendment to the Fourth Amended and Restated agreement of Limited Partnership of Sun Communities Operating Limited Partnership (this “Amendment”) is made and entered into on March 23, 2023 (“Effective Date”), by SUN COMMUNITIES, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: þ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2) ☐ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to ss.

SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) MARCH 2023 SOUTHERN PALMS – LADSON, SC 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun

a4q2022ipx032023 SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) MARCH 2023 SOUTHERN PALMS – LADSON, SC 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 6, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

List issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of February 23, 2023, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 22, 2023 (Date of earliest event reported) SUN COMMUNITIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 22, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

List of Subsidiaries of Sun Communities, Inc.

SUN COMMUNITIES, INC. Exhibit 21.1 – List of Subsidiaries Main operating subsidiary: Sun Communities Operating Limited Partnership, a Michigan limited partnership Other subsidiaries: 481 Associates, a Florida general partnership 1008 Tuscany, LLC, a Mississippi limited liability company AIOP Brentwood West, L.L.C., a Delaware limited liability company AIOP Florida Properties I, L.L.C., a Delaware

Sun Communities, Inc. For the Quarter and Year Ended December 31, 2022 and 2021

Sun Communities, Inc. Press Release & Supplemental Operating and Financial Data For the Quarter and Year Ended December 31, 2022 and 2021 Page Earnings Press Release and Guidance i 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 Consol

Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer Identification No.)

Fourth Amended and Restated Bylaws

FOURTH AMENDED AND RESTATED BYLAWS OF SUN COMMUNITIES, INC. ARTICLE I CHARTER AND OFFICES Section 1.CHARTER. These bylaws (these “Bylaws”) shall be subject to the terms of the charter (the “Charter”), as from time to time in effect, of Sun Communities, Inc. (the “Corporation”). Section 2.PRINCIPAL OFFICE. The principal office of the Corporation shall be located at such place or places as the Board

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 15, 2023 (Date of earliest event reported) SUN COMMUNITIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 15, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

SUI / Sun Communities Inc / COHEN & STEERS, INC. Passive Investment

SC 13G/A 1 sui13gbody-123122.htm SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (AMENDMENT NO. 2)* Sun Communities Inc (Name of Issuer) Common Stock (Title of Class of Securities) 866674104 (CUSIP Number) December 31, 20

SUI / Sun Communities Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01985-suncommunitiesinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 17)* Name of issuer: Sun Communities Inc. Title of Class of Securities: REIT CUSIP Number: 866674104 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate th

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: January 25, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emplo

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: January 17, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission Fi

Fourth Supplemental Indenture, dated as of January 17, 2023 by and among Sun Communities Operating Limited Partnership, Sun Communities, Inc. and UMB Bank., N.A. as trustee.

Exhibit 4.2 SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP as the Company SUN COMMUNITIES, INC. as Guarantor and UMB BANK, N.A. as Trustee FOURTH SUPPLEMENTAL INDENTURE Dated as of January 17, 2023 to INDENTURE Dated as of June 28, 2021 5.700% SENIOR NOTES DUE 2033 TABLE OF CONTENTS Page ARTICLE ONE Relation to Indenture; Definitions 1 SECTION 1.01. Relation to Indenture 1 SECTION 1.02. Definitions

Consent of Taft Stettinius & Hollister LLP (Included in Exhibit 5.3)

Exhibit 5.3 27777 Franklin Road, Suite 2500 Southfield, Michigan 48034-8214 Tel: 248.351.3000 | Fax: 248.351.3082 January 17, 2023 Sun Communities, Inc. Sun Communities Operating Limited Partnership 27777 Franklin Road Suite 300 Southfield, MI 48034 Attention: Board of Directors Ladies and Gentlemen: We have acted as Michigan counsel to Sun Communities Operating Limited Partnership, a Michigan lim

Calculation of Filing Fee Tables (Form Type) SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Tables 424(b)(5) (Form Type) SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities The prospectus supplement to which this Exhibit is attached is a final prospectus for the related offerings.

Underwriting Agreement dated January 9, 2023 by and among Sun Communities, Inc., Sun Communities Operating Limited Partnership, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and BofA Securities, Inc.

EX-1.1 2 underwritingagreementjanua.htm EX-1.1 Sun Communities, Inc. $400,000,000 5.700% Senior Notes due 2033 Underwriting Agreement New York, New York January 9, 2023 Citigroup Global Markets Inc. J.P. Morgan Securities LLC BofA Securities, Inc. As Representatives of the several Underwriters named in Schedule I hereto c/o Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 1001

Sun Communities, Inc. Prices $400 Million of Senior Notes January 9, 2023 Southfield, MI, Jan. 09, 2023 (GLOBE NEWSWIRE) -- Sun Communities, Inc. (NYSE: SUI) (the “Company”), a real estate investment trust (“REIT”) that owns and operates or has an in

Sun Communities, Inc. Prices $400 Million of Senior Notes January 9, 2023 Southfield, MI, Jan. 09, 2023 (GLOBE NEWSWIRE) - Sun Communities, Inc. (NYSE: SUI) (the “Company”), a real estate investment trust (“REIT”) that owns and operates or has an interest in manufactured housing (“MH”) communities, recreational vehicle (“RV”) communities and marinas, today announced that its operating partnership,

$400,000,000 Sun Communities Operating Limited Partnership 5.700% Senior Notes due 2033 Fully and Unconditionally Guaranteed by Sun Communities, Inc.

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-255020 Registration No. 333-255020-01 PROSPECTUS SUPPLEMENT (To Prospectus dated April 2, 2021) $400,000,000 Sun Communities Operating Limited Partnership 5.700% Senior Notes due 2033 Fully and Unconditionally Guaranteed by Sun Communities, Inc. Sun Communities Operating Limited Partnership, or the Operating Partnership, is of

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: January 9, 2023 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employ

Pricing Term Sheet January 9, 2023 Sun Communities Operating Limited Partnership $400,000,000 5.700% Senior Notes due 2033 Fully and Unconditionally Guaranteed by Sun Communities, Inc. Issuer: Sun Communities Operating Limited Partnership Guarantor:

Issuer Free Writing Prospectus Filed Pursuant to Rule 433 Registration Nos. 333-255020; 333-255020-01 Relating to Preliminary Prospectus Supplement dated January 9, 2023 to Prospectus dated April 2, 2021 Pricing Term Sheet January 9, 2023 Sun Communities Operating Limited Partnership $400,000,000 5.700% Senior Notes due 2033 Fully and Unconditionally Guaranteed by Sun Communities, Inc. Issuer: Sun

SUBJECT TO COMPLETION, DATED JANUARY 9, 2023

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-255020 Registration No. 333-255020-01 SUBJECT TO COMPLETION, DATED JANUARY 9, 2023 This preliminary prospectus supplement relates to an effective registration statement under the Securities Act of 1933, as amended, but is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus ar

SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) NOVEMBER 2022 CHERRYWOOD – CLINTON, NY 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun

SUN COMMUNITIES INVESTOR PRESENTATION (NYSE: SUI) NOVEMBER 2022 CHERRYWOOD ? CLINTON, NY 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: November 14, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of October 25, 2022, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022. ☐ TRANSITION REPORT PURSUAN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022. or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryla

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: October 24, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emplo

Sun Communities, Inc. For the Quarter and Nine Months Ended September 30, 2022 and 2021

Sun Communities, Inc. Press Release & Supplemental Operating and Financial Data For the Quarter and Nine Months Ended September 30, 2022 and 2021 Page Earnings Press Release i 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 5 Consolidate

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: October 4, 2022 (Date of earliest event reported) SUN COMMUNITIES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: October 4, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employ

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: September 8, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

INVESTOR PRESENTATION SEPTEMBER 8, 2022 SUN OUTDOORS CAROLINA PINES RV RESORT – CONWAY, SC 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “S

INVESTOR PRESENTATION SEPTEMBER 8, 2022 SUN OUTDOORS CAROLINA PINES RV RESORT ? CONWAY, SC 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: September 7, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 25, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file num

List of issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of July 26, 2022, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

Sun Communities, Inc. Reports 2022 Second Quarter Results

Table of Contents Summary - Earnings Press Release i Guidance vii Portfolio Overview, Research Coverage and Inquiries 1 Financial Information Financial and Operating Highlights 2 Consolidated Balance Sheets 4 Statements of Operations 5 Outstanding Securities and Capitalization 6 Debt Analysis 7 Reconciliations to Non-GAAP Financial Measures 8 Reconciliation of Net Income to Funds from Operations 9

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022. ☐ TRANSITION REPORT PURSUANT TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022. or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: July 25, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Sun Communities, Inc. Reports 2022 Second Quarter Results

Table of Contents Summary - Earnings Press Release i Guidance vii Portfolio Overview, Research Coverage and Inquiries 1 Financial Information Financial and Operating Highlights 2 Consolidated Balance Sheets 4 Statements of Operations 5 Outstanding Securities and Capitalization 6 Debt Analysis 7 Reconciliations to Non-GAAP Financial Measures 8 Reconciliation of Net Income to Funds from Operations 9

INVESTOR DAY PRESENTATION JUNE 2022 PARK HOLIDAYS – INVESTOR DAY AGENDA Overview and Rationale Business Overview Why Park Holidays 1 2 3 SEAVIEW – WHITSTABLE, KENT STEEPLE BAY – SOUTHMINSTER, ESSEX WOOD FARM – CHARMOUTH, DORSET 2 1 OVERVIEW AND RATIO

sui-phinvestordaypresent INVESTOR DAY PRESENTATION JUNE 2022 PARK HOLIDAYS – INVESTOR DAY AGENDA Overview and Rationale Business Overview Why Park Holidays 1 2 3 SEAVIEW – WHITSTABLE, KENT STEEPLE BAY – SOUTHMINSTER, ESSEX WOOD FARM – CHARMOUTH, DORSET 2 1 OVERVIEW AND RATIONALE ACQUISITION Source: Company information.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: June 21, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

As filed with the Securities and Exchange Commission on June 10, 2022

As filed with the Securities and Exchange Commission on June 10, 2022 Registration No.

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables S-8 (Form Type) Sun Communities, Inc.

INVESTOR PRESENTATION JUNE 6, 2022 SHADOW WOOD VILLAGE – HUDSON, FL 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Company,”

a1q2022ipx06062022xfina INVESTOR PRESENTATION JUNE 6, 2022 SHADOW WOOD VILLAGE – HUDSON, FL 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: June 6, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Unregistered Sales of Equity Securities, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 13, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 11, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

INVESTOR PRESENTATION MAY 11, 2022 SUN OUTDOORS MYRTLE BEACH – CONWAY, SC 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Com

EX-99.1 2 a1q2022ipx052022.htm EX-99.1 INVESTOR PRESENTATION MAY 11, 2022 SUN OUTDOORS MYRTLE BEACH – CONWAY, SC 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “Sun,” and “the Company,” and from third-party sources indicated herein. Such third-party information has not been independently v

Unregistered Sales of Equity Securities

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: May 2, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer I

issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of April 26, 2022, the debt instruments indicated are below fully and unconditionally guaranteed by Sun Communities, Inc. Debt Instrument Issuer Jurisdiction of Organization 2.7% Senior Notes due 2031 Sun Communities Operating Limited Partnership Michigan 2.3% Senior Notes due 2028 Sun Communities Operating Limited Partnership Michigan

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022. ☐ TRANSITION PURSUANT TO SECTIO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022. or ? TRANSITION PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616

Second Amendment to the Sun Communities, Inc. First Amended and Restated 2004 Non-Employee Director Option Plan effective as of March 29, 2022

SECOND AMENDMENT TO SUN COMMUNITIES, INC. FIRST AMENDED AND RESTATED 2004 NON-EMPLOYEE DIRECTOR OPTION PLAN This Second Amendment to the Sun Communities, Inc. First Amended and Restated 2004 Non-Employee Director Option Plan (this ?Amendment?) is effective as of March 29, 2022 (the ?Effective Date?). All capitalized terms used, but not defined, in this Amendment have the same meanings as in the Su

Sun Communities, Inc. Reports 2022 First Quarter Results

Table of Contents Summary - Earnings Press Release i Investor Information 1 Portfolio Overview 2 Financial Information Financial and Operating Highlights 3 Consolidated Balance Sheets 4 Statements of Operations 5 Outstanding Securities and Capitalization 6 Reconciliations to Non-GAAP Financial Measures 7 Reconciliation of Net Income to Funds from Operations 8 Reconciliation of Net Income to Net Op

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 25, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employe

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 7, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission File

UK Sub-Plan under the Sun Communities, Inc. 2015 Equity Incentive Plan

Exhibit 10.4 UK SUB-PLAN under the SUN COMMUNITIES, INC. 2015 EQUITY INCENTIVE PLAN April 6, 2022 Sun Communities, Inc. (the ?Company?) has established this Sub-Plan for the United Kingdom (the ?UK Sub-Plan?) under the Company?s 2015 Equity Incentive Plan (as amended from time to time, the ?Plan?), as of the date above, pursuant to a resolution adopted by the Board of the Plan and in accordance wi

Amendment No. 1, dated April 7, 2022, to the Fourth Amended and Restated Credit Agreement and Other Loan Documents, among Sun Communities Operating Limited Partnership, as Borrower, Citibank, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer, Citisecurities Limited, as special administrative agent for the AUD RC Lenders; with Citibank, N.A., Citizens Bank, N.A., BofA Securities, Inc., BMO Capital Markets Corp., JPMorgan Chase Bank, N.A., RBC Capital Markets, Fifth Third Bank, National Association, Regions Bank, The Huntington National Bank, Truist Securities, Inc., U.S. Bank National Association, Wells Fargo Bank, National Association, and Sumitomo Mitsui Banking Corporation, as Joint Lead Arrangers, Citibank, N.A., Citizens Bank, N.A., BofA Securities, Inc., BMO Capital Markets Corp., JPMorgan Chase Bank, N.A., RBC Capital Markets and Fifth Third Bank, National Association, as Joint Bookrunners, BofA Securities, Inc., Citibank, N.A., and Sumitomo Mitsui Banking Corporation, as Co-Sustainability Structuring Agents, and Bank of America N.A., JPMorgan Chase Bank, N.A., Bank of Montreal, Citizens Bank, N.A., Royal Bank of Canada and Fifth Third Bank, National Association, as Co-Syndication Agents.

Exhibit 10.1 EXECUTION VERSION AMENDMENT NO. 1 TO THE FOURTH AMENDED AND RESTATED CREDIT AGREEMENT AND OTHER LOAN DOCUMENTS Dated as of April 7, 2022 This AMENDMENT NO. 1 TO THE FOURTH AMENDED AND RESTATED CREDIT AGREEMENT AND OTHER LOAN DOCUMENTS (this ?Amendment?) among SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (the ?Operating Partnership? and, together with a

April 13, 2022

April 13, 2022 United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, NE Washington, D.

Employment Agreement dated April 8, 2022 among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Karen J. Dearing

Exhibit 10.2 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this ?Agreement?) is made and entered into as of April 8, 2022 but for all purposes shall become effective on May 2, 2022 (the ?Effective Date?), by and among SUN COMMUNITIES, INC., a Maryland corporation (the ?REIT?), SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (?SCOLP?) and KAREN J. DEARING (the ?Execu

Employment Agreement dated April 8, 2022 among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Fernando Castro-Caratini

Exhibit 10.3 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this ?Agreement?) is made and entered into as of April 8, 2022 but for all purposes shall become effective on May 2, 2022 (the ?Effective Date?), by and among SUN COMMUNITIES, INC., a Maryland corporation (the ?REIT?), SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (?SCOLP?) and FERNANDO CASTRO-CARATINI (th

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 12, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission File

Incorporated by reference to Exhibit 4.2 of Sun Communities Inc.’s Current Report on Form 8-k filed on April 12, 2022

Exhibit 4.2 SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP as the Company SUN COMMUNITIES, INC. as Guarantor and UMB BANK, N.A. as Trustee THIRD SUPPLEMENTAL INDENTURE Dated as of April 12, 2022 to INDENTURE Dated as of June 28, 2021 4.200% SENIOR NOTES DUE 2032 TABLE OF CONTENTS Page ARTICLE ONE Relation to Indenture; Definitions 1 SECTION 1.01. Relation to Indenture 1 SECTION 1.02. Definitions 1

Consent of Jaffe, Raitt, Heuer & Weiss, Professional Corporation (Included in Exhibit 5.3)

Exhibit 5.3 April 12, 2022 Sun Communities, Inc. Sun Communities Operating Limited Partnership 27777 Franklin Road Suite 200 Southfield, MI 48034 Attention: Board of Directors Ladies and Gentlemen: We have acted as Michigan counsel to Sun Communities Operating Limited Partnership, a Michigan limited partnership (the ?Operating Partnership?), in connection with the registration, offer and sale by t

$600,000,000 Sun Communities Operating Limited Partnership 4.200% Senior Notes due 2032 Fully and Unconditionally Guaranteed by Sun Communities, Inc.

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-255020 Registration No. 333-255020-01 PROSPECTUS SUPPLEMENT (To Prospectus dated April 2, 2021) $600,000,000 Sun Communities Operating Limited Partnership 4.200% Senior Notes due 2032 Fully and Unconditionally Guaranteed by Sun Communities, Inc. Sun Communities Operating Limited Partnership, or the Operating Partnership, is of

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: April 5, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission File

Calculation of Filing Fee Tables (Form Type) SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Tables 424(b)(5) (Form Type) SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities The prospectus supplement to which this Exhibit is attached is a final prospectus for the related offerings.

Sun Communities, Inc. Prices $600 Million of Senior Notes

Exhibit 99.1 Sun Communities, Inc. Prices $600 Million of Senior Notes April 5, 2022 Southfield, MI, April 05, 2022 (GLOBE NEWSWIRE) ? Sun Communities, Inc. (NYSE: SUI) (the ?Company?), a real estate investment trust (?REIT?) that owns and operates or has an interest in manufactured housing (?MH?) communities, recreational vehicle (?RV?) resorts and marinas, today announced that its operating part

Underwriting Agreement dated April 5, 2022 by and among Sun Communities, Inc., Sun Communities Operating Limited Partnership, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and BofA Securities, Inc.

EX-1.1 2 d343595dex11.htm EX-1.1 Exhibit 1.1 Sun Communities, Inc. $600,000,000 4.200% Senior Notes due 2032 Underwriting Agreement New York, New York April 5, 2022 Citigroup Global Markets Inc. J.P. Morgan Securities LLC BofA Securities, Inc. As Representatives of the several Underwriters named in Schedule I hereto c/o Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 c/

SUBJECT TO COMPLETION, DATED APRIL 5, 2022

424B5 1 d345161d424b5.htm 424B5 Table of Contents This preliminary prospectus supplement relates to an effective registration statement under the Securities Act of 1933, as amended, but is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and they are not soliciting an offer to buy these securities in a

Pricing Term Sheet April 5, 2022 Sun Communities Operating Limited Partnership $600,000,000 4.200% Senior Notes due 2032 Fully and Unconditionally Guaranteed by Sun Communities, Inc. Issuer: Sun Communities Operating Limited Partnership Guarantor: Su

FWP 1 d345161dfwp.htm FWP Issuer Free Writing Prospectus Filed Pursuant to Rule 433 Registration Nos. 333-255020; 333-255020-01 Relating to Preliminary Prospectus Supplement dated April 5, 2022 to Prospectus dated April 2, 2021 Pricing Term Sheet April 5, 2022 Sun Communities Operating Limited Partnership $600,000,000 4.200% Senior Notes due 2032 Fully and Unconditionally Guaranteed by Sun Communi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registra

DEFA14A 1 defa14adefinitiveadditiona.htm DEF 14A DEFINITIVE ADDITIONAL MATERIALS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the app

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEF 14A 1 a2022proxy-nextgen.htm DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant [ X ] Filed by a Party other than the Registrant [ ] Check the appropriate box: ☐ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED

First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Aaron Weiss dated March 30, 2022

Exhibit 10.5 FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (this ?Amendment?) is made and entered into as of March 30, 2022 (the ?Effective Date?), by and among SUN COMMUNITIES, INC., a Maryland corporation (the ?REIT?), SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (?SCOLP?), and Aaron Weiss (the ?Executive?). As used herein,

First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Gary A. Shiffman dated March 30, 2022

Exhibit 10.1 FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (this ?Amendment?) is made and entered into as of March 30, 2022 (the ?Effective Date?), by and among SUN COMMUNITIES, INC., a Maryland corporation (the ?REIT?), SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (?SCOLP?), and Gary A. Shiffman (the ?Executive?). As used her

First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Karen J. Dearing dated March 30, 2022

Exhibit 10.3 FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (this ?Amendment?) is made and entered into as of March 30, 2022 (the ?Effective Date?), by and among SUN COMMUNITIES, INC., a Maryland corporation (the ?REIT?), SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (?SCOLP?), and Karen J. Dearing (the ?Executive?). As used her

First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Bruce Thelen dated March 30, 2022

Exhibit 10.4 FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (this ?Amendment?) is made and entered into as of March 30, 2022 (the ?Effective Date?), by and among SUN COMMUNITIES, INC., a Maryland corporation (the ?REIT?), SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (?SCOLP?), and Bruce Thelen (the ?Executive?). As used herein,

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 30. 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission File

First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and John B. McLaren dated March 30, 2022

Exhibit 10.2 FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (this ?Amendment?) is made and entered into as of March 30, 2022 (the ?Effective Date?), by and among SUN COMMUNITIES, INC., a Maryland corporation (the ?REIT?), SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership (?SCOLP?), and John B. McLaren (the ?Executive?). As used here

Calculation of Filing Fee Tables (Form Type) Sun Communities, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum

Exhibit 107 EX-FILING FEES Calculation of Filing Fee Tables 424B7 (Form Type) Sun Communities, Inc.

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 17, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State or other jurisdiction of incorporation) (Commission File

SUN COMMUNITIES, INC. 145,455 Shares of Common Stock

424B7 1 d336932d424b7.htm 424B7 Table of Contents Filed Pursuant to Rule 424(b)(7) Registration No. 333-255020 PROSPECTUS SUPPLEMENT (To Prospectus Dated April 2, 2021) SUN COMMUNITIES, INC. 145,455 Shares of Common Stock This prospectus supplement relates to the offer and sale from time to time by the selling stockholders identified herein of up to 145,455 shares of common stock, par value $0.01

INVESTOR PRESENTATION MARCH 4, 2022 SUN OUTDOORS PANAMA CITY BEACH – PANAMA CITY BEACH, FL 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc., referred to herein as “we,” “our,” “S

INVESTOR PRESENTATION MARCH 4, 2022 SUN OUTDOORS PANAMA CITY BEACH ? PANAMA CITY BEACH, FL 2 This presentation has been prepared for informational purposes only from information supplied by Sun Communities, Inc.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: March 4, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 Commission file number 1-12616 SUN COMM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 Commission file number 1-12616 SUN COMMUNITIES, INC. (Exact Name of Registrant as Specified in its Charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.

List of Subsidiaries of Sun Communities, Inc.

SUN COMMUNITIES, INC. Exhibit 21.1 ? List of Subsidiaries Main operating subsidiary: Sun Communities Operating Limited Partnership, a Michigan limited partnership Other subsidiaries: 481 Associates, a Florida general partnership 1008 Tuscany, LLC, a Mississippi limited liability company AIOP Brentwood West, L.L.C., a Delaware limited liability company AIOP Florida Properties I, L.L.C., a Delaware

Sun Communities, Inc. Reports 2021 Fourth Quarter Results and 2022 Guidance

EX-99.1 2 exhibit991pressreleaseands.htm EX-99.1 Table of Contents Summary - Earnings Press Release i Investor Information 1 Portfolio Overview 2 Financial Information Financial and Operating Highlights 3 Consolidated Balance Sheets 4 Statements of Operations 5 Outstanding Securities and Capitalization 6 Reconciliations to Non-GAAP Financial Measures 7 Reconciliation of Net Income to Funds from Op

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 21, 2022 (Date of earliest event reported) SUN COMMUNITIES, INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Empl

List issuers of guaranteed securities

List of Issuers of Guaranteed Securities As of February 22, 2022, the debt instruments indicated are below fully and unconditionally guaranteed by Sun Communities, Inc. Debt Instrument Issuer Jurisdiction of Organization 2.7% Senior Notes due 2031 Sun Communities Operating Limited Partnership Michigan 2.3% Senior Notes due 2028 Sun Communities Operating Limited Partnership Michigan

Sun Communities, Inc. Non-Employee Directors Deferred Compensation Plan

Sun Communities, Inc. Non-Employee Directors Deferred Compensation Plan 1.Establishment of Plan. Sun Communities, Inc. (the ?Company?) adopts and establishes an unfunded deferred compensation plan for certain members of the Board of Directors (each a ?Director,? and collectively the ?Directors?) of the Company, which shall be known as the Sun Communities, Inc. Non-Employee Directors Deferred Compe

SUI / Sun Communities Inc / COHEN & STEERS, INC. Passive Investment

SC 13G/A 1 sui13gbody-123121.htm SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (AMENDMENT NO. 1)* Sun Communities Inc (Name of Issuer) Common Stock (Title of Class of Securities) 866674104 (CUSIP Number) December 31, 20

SUI / Sun Communities Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 16)* Name of issuer: Sun Communities Inc. Title of Class of Securities: REIT CUSIP Number: 866674104 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Rule

Unregistered Sales of Equity Securities

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: February 1, 2022 (Date of earliest event reported) SUN COMMUNITIES INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Employ

Unregistered Sales of Equity Securities

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: December 22, 2021 (Date of earliest event reported) SUN COMMUNITIES INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emplo

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: December 17, 2021 (Date of earliest event reported) SUN COMMUNITIES INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emplo

J.P. Morgan Securities LLC, RBC Capital Markets, LLC, Regions Securities LLC, Fifth Third Securities, Inc., BTIG, LLC, Jefferies LLC, Samuel A. Ramirez & Company, Inc. and Robert W. Baird & Co. Incorporated, in their capacity as Sales Agents (as defined above), principal and/or (except in the case of Regions Securities LLC, Fifth Third Securities, Inc., BTIG, LLC, Jefferies LLC, Samuel A. Ramirez & Company, Inc. and Robert W. Baird & Co. Incorporated) forward seller, and each of Bank of Montreal, Bank of America, N.A., Citibank, N.A., JPMorgan Chase Bank, National Association and Royal Bank of Canada, as forward purchaser, dated December 17, 2021.

SUN COMMUNITIES, INC. At the Market Offering Sales Agreement December 17, 2021 BMO Capital Markets Corp. 151 W 42nd Street New York, New York 10036 Bank of Montreal 55 Bloor Street West, 18th Floor Toronto, Ontario M5X 1A1 Canada BofA Securities, Inc. One Bryant Park New York, New York 10036 Bank of America, N.A. One Bryant Park New York, New York 10036 Citigroup Global Markets Inc. 388 Greenwich

CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Proposed Maximum Offering Price Amount of Registration Fee Common Stock, $0.01 par value per share $1,250,000,000(1) $100,218 (2)

Table of Contents CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Proposed Maximum Offering Price Amount of Registration Fee Common Stock, $0.

PRIVATE PLACEMENT PROCEDURES

To: Sun Communities, Inc. 27777 Franklin Road, Suite 200 Southfield, Michigan 48304 From: [DEALER NAME AND NOTICE INFORMATION] Date: [*], 202[*] Ladies and Gentlemen: The purpose of this communication (this ?Master Confirmation?) is to set forth the terms and conditions of the transactions to be entered into from time to time between [DEALER NAME] (?Dealer?) and Sun Communities, Inc. (?Counterpart

Underwriting Agreement dated November 15, 2021 among Sun Communities, Inc., Sun Communities Operating Limited Partnership, Citigroup Global Markets, Inc. (in its capacity as agent for Citibank, N.A.), as the forward seller, Citibank, N.A., as the forward counterparty, and Citigroup Global Markets Inc. and RBC Capital Markets, LLC, as the representatives of the several underwriters named in Schedule II thereto

EX-1.3 4 suiunderwritingagreementfo.htm EX-1.3 Sun Communities, Inc. 3,500,000 Shares1 Common Stock ($0.01 par value per share) Underwriting Agreement New York, New York November 15, 2021 Citigroup Global Markets Inc. RBC Capital Markets, LLC As the Representatives of the several Underwriters named in Schedule II hereto c/o Citigroup Global Markets Inc. 390 Greenwich Street, 3rd Floor New York, Ne

between Sun Communities, Inc. and Citibank, N.A.

EX-1.1 2 suicitiforwardconfirmation.htm EX-1.1 Date: November 15, 2021 To: Sun Communities, Inc. 27777 Franklin Road, Suite 200 Southfield, Michigan 48304 From: Citibank, N.A. 390 Greenwich Street New York, NY 10013 Attn: Eric Natelson Telephone: (212) 723-7310 Email: [email protected] Re: Registered Forward Transaction Ladies and Gentlemen: The purpose of this letter agreement is to confirm

Source: Sun Communities, Inc. November 15, 2021 16:27 ET Sun Communities, Inc. Commences Public Offering of 2,750,000 Shares of Common Stock Southfield, MI, Nov. 15, 2021 (GLOBE NEWSWIRE) -- Sun Communities, Inc. (NYSE:SUI) (the “Company”), a real es

EX-99.1 6 suncommunitiesinccommenc.htm EX-99.1 Source: Sun Communities, Inc. November 15, 2021 16:27 ET Sun Communities, Inc. Commences Public Offering of 2,750,000 Shares of Common Stock Southfield, MI, Nov. 15, 2021 (GLOBE NEWSWIRE) - Sun Communities, Inc. (NYSE:SUI) (the “Company”), a real estate investment trust (“REIT”) that owns and operates or has an interest in manufactured housing (“MH”)

Source: Sun Communities, Inc. November 15, 2021 23:02 ET Sun Communities, Inc. Announces Upsizing and Pricing of Public Offering of Common Stock Southfiled, MI, Nov. 15, 2021 (GLOBE NEWSWIRE) -- Sun Communities, Inc. (NYSE:SUI) (the “Company”), a rea

Source: Sun Communities, Inc. November 15, 2021 23:02 ET Sun Communities, Inc. Announces Upsizing and Pricing of Public Offering of Common Stock Southfiled, MI, Nov. 15, 2021 (GLOBE NEWSWIRE) - Sun Communities, Inc. (NYSE:SUI) (the ?Company?), a real estate investment trust (?REIT?) that owns and operates or has an interest in manufactured housing (?MH?) communities, recreational vehicle (?RV?) re

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report: November 15, 2021 (Date of earliest event reported) SUN COMMUNITIES INC. (Exact name of registrant as specified in its charter) Maryland 1-12616 38-2730780 (State of Incorporation) Commission file number (I.R.S. Emplo

between Sun Communities, Inc. and Citibank, N.A.

Date: November 16, 2021 To: Sun Communities, Inc. 27777 Franklin Road, Suite 200 Southfield, Michigan 48304 From: Citibank, N.A. 390 Greenwich Street New York, NY 10013 Attn: Eric Natelson Telephone: (212) 723-7310 Email: [email protected] Re: Registered Forward Transaction Ladies and Gentlemen: The purpose of this letter agreement is to confirm the terms and conditions of the Transaction ent

CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Amount to be Registered(1) Proposed Maximum Offering Price Per Unit Proposed Maximum Aggregate Offering Price Amount of Registration Fee(2) Common Stock, $0.01 par val

Table of Contents CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Amount to be Registered(1) Proposed Maximum Offering Price Per Unit Proposed Maximum Aggregate Offering Price Amount of Registration Fee(2) Common Stock, $0.

SUN COMMUNITIES, INC. TO ACQUIRE PARK HOLIDAYS UK FOR $1.3 BILLION Enters the UK Market with the Addition of a Leading UK Holiday Communities Platform with Irreplaceable Seaside Communities Conference Call Today at 4:30 PM EST

Exhibit 99.1 SUN COMMUNITIES, INC. TO ACQUIRE PARK HOLIDAYS UK FOR $1.3 BILLION Enters the UK Market with the Addition of a Leading UK Holiday Communities Platform with Irreplaceable Seaside Communities Conference Call Today at 4:30 PM EST Southfield, MI, November 15, 2021 - Sun Communities, Inc. (NYSE: SUI) (?Sun? or the ?Company?) today announced that it had entered into a definitive agreement t

Agreement for the Sale and Purchase of the Entire Issued Share Capital of Tiger Topco 1 Limited, dated November 13, 2021, by and among SCI Bidco Limited, Tiger VI Investment S.à r.l., the individual sellers named therein and Tiger VI Financing S.à r.l.

Exhibit 2.1 DATE: 13 November 2021 AGREEMENT FOR THE SALE AND PURCHASE OF THE ENTIRE ISSUED SHARE CAPITAL OF TIGER TOPCO 1 LIMITED Between (1) THE SELLERS (AS DEFINED HEREIN) (2) NON-SELLER MANAGEMENT LOAN NOTE HOLDERS (AS DEFINED HEREIN) (3) TIGER FINANCING (AS DEFINED HEREIN) and (4) THE PURCHASER (AS DEFINED HEREIN) TABLE OF CONTENTS 1. Definitions and Interpretation 1 2. Agreement for Sale of