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SEC.gov | Request Rate Threshold Exceeded

U.S. Securities and Exchange Commission

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More Information

Internet Security Policy

By using this site, you are agreeing to security monitoring and auditing. For security purposes, and to ensure that the public service remains available to users, this government computer system employs programs to monitor network traffic to identify unauthorized attempts to upload or change information or to otherwise cause damage, including attempts to deny service to users.

Unauthorized attempts to upload information and/or change information on any portion of this site are strictly prohibited and are subject to prosecution under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act of 1996 (see Title 18 U.S.C. §§ 1001 and 1030).

To ensure our website performs well for all users, the SEC monitors the frequency of requests for SEC.gov content to ensure automated searches do not impact the ability of others to access SEC.gov content. We reserve the right to block IP addresses that submit excessive requests. Current guidelines limit users to a total of no more than 10 requests per second, regardless of the number of machines used to submit requests.

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sui-20260224false000091259300009125932026-02-242026-02-24

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, 2026 (Date of earliest event reported)

SUN COMMUNITIES, INC

(Exact name of registrant as specified in its charter)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On February 24, 2026, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended December 31, 2025, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on February 25, 2026 to discuss the financial results for the period ended December 31, 2025.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated February 24, 2026

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: February 24, 2026By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20251029false000091259300009125932025-10-292025-10-29

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 29, 2025 (Date of earliest event reported)

SUN COMMUNITIES, INC

(Exact name of registrant as specified in its charter)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On October 29, 2025, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended September 30, 2025, and certain other information.

The Company will hold an investor conference call and webcast at 2:00 p.m. ET on October 30, 2025 to discuss the financial results for the period ended September 30, 2025.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated October 29, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: October 29, 2025By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20250730false000091259300009125932025-07-302025-07-30

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)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On July 30, 2025, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended June 30, 2025, and certain other information.

The Company will hold an investor conference call and webcast at 2:00 p.m. ET on July 31, 2025 to discuss the financial results for the period ended June 30, 2025.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated July 30, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: July 30, 2025By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20250505false000091259300009125932025-05-052025-05-05

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)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On May 5, 2025, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended March 31, 2025, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on May 6, 2025 to discuss the financial results for the period ended March 31, 2025.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated May 5, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: May 5, 2025By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20250226false000091259300009125932025-02-262025-02-26

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)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On February 26, 2025, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended December 31, 2024, and certain other information.

The Company will hold an investor conference call and webcast at 2:00 p.m. ET on February 27, 2025 to discuss the financial results for the period ended December 31, 2024.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated February 26, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: February 26, 2025By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20241106false000091259300009125932024-11-062024-11-06

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)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On November 6, 2024, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended September 30, 2024, and certain other information.

The Company will hold an investor conference call and webcast at 5:00 p.m. ET on November 6, 2024 to discuss the financial results for the period ended September 30, 2024.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated November 6, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: November 6, 2024By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20240731false000091259300009125932024-07-312024-07-31

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)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On July 31, 2024, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended June 30, 2024, and certain other information.

The Company will hold an investor conference call and webcast at 2:00 p.m. ET on August 1, 2024 to discuss the financial results for the period ended June 30, 2024.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated July 31, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: July 31, 2024By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20240429false000091259300009125932024-04-292024-04-29

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)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On April 29, 2024, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended March 31, 2024, and certain other information.

The Company will hold an investor conference call and webcast at 2:00 p.m. ET on April 30, 2024 to discuss the financial results for the period ended March 31, 2024.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated April 29, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: April 29, 2024By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20240215false000091259300009125932024-02-202024-02-20

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)

Maryland1-1261638-2730780 (State or other jurisdiction of incorporation)Commission File Number(IRS Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On February 20, 2024, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended December 31, 2023, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on February 21, 2024 to discuss the financial results for the period ended December 31, 2023.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Item 4.02 Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review

(a)    In 2022, the Company acquired a portfolio of holiday park properties located in the United Kingdom (“Park Holidays”), a reporting unit within the Company’s manufactured housing segment. During the course of management’s 2023 year-end procedures, the Company reviewed the controls relating to the valuation of the Park Holidays business and the associated goodwill at March 31, 2023, June 30, 2023 and September 30, 2023 (collectively, the "Interim Period End Dates"). In connection with that review, the Company concluded that changes in certain triggering factors relevant to the valuation of the Park Holidays business, including reduced financial projections and increased interest rates, should have been taken into account when preparing its previously issued unaudited interim consolidated financial statements (collectively, the "Interim Financial Statements") as of and for the period ended March 31, 2023, as of and for the period ended June 30, 2023, and as of and for the period ended September 30, 2023 (collectively, the “Interim Periods”), included in the Company’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2023, June 30, 2023 and September 30, 2023, respectively. Management undertook a full review of the valuations and determined that as of each Interim Period End Date, the Company should have recognized non-cash impairments to goodwill for the Park Holidays business.

On February 15, 2024, the Audit Committee of the Board of Directors (the “Audit Committee”) of the Company, after discussion with the management of the Company, concluded that the Interim Financial Statements should no longer be relied upon due to errors in such financial statements. Similarly, any previously furnished or filed reports, related earnings releases, investor presentations or similar communications of the Company describing the Interim Financial Statements should no longer be relied upon. The Company determined that each of the Interim Financial Statements contained an error relating to non-cash goodwill impairment and that a restatement of the Interim Financial Statements is required.

The non-cash goodwill impairments result in the following negative adjustments to net inc

sui-20231025false000091259300009125932023-10-252023-10-25

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On October 25, 2023, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended September 30, 2023, and certain other information.

The Company will hold an investor conference call and webcast at 2:00 p.m. ET on October 26, 2023 to discuss the financial results for the period ended September 30, 2023.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated October 25, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: October 25, 2023By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20230726false000091259300009125932023-07-262023-07-26

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On July 26, 2023, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended June 30, 2023, and certain other information.

The Company will hold an investor conference call and webcast at 12:00 p.m. ET on July 27, 2023 to discuss the financial results for the period ended June 30, 2023.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated July 26, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: July 26, 2023By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20230426false000091259300009125932023-04-262023-04-26

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On April 26, 2023, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended March 31, 2023, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on April 27, 2023 to discuss the financial results for the period ended March 31, 2023.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated April 26, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: April 26, 2023By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20230222false000091259300009125932023-02-232023-02-23

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 300,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On February 22, 2023, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended December 31, 2022, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on February 23, 2023 to discuss the financial results for the period ended December 31, 2022.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated February 22, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: February 23, 2023By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20221024false000091259300009125932022-10-242022-10-24

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 200,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On October 24, 2022, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended September 30, 2022, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on October 25, 2022 to discuss the financial results for the period ended September 30, 2022.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated October 24, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: October 24, 2022By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20220725false000091259300009125932022-07-252022-07-25

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 200,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On July 25, 2022, Sun Communities, Inc. (the "Company") furnished a Current Report on Form 8-K (the “Original 8-K”) that included a press release announcing its financial results for the period ended June 30, 2022 and certain other information. This current report on Form 8-K/A amends the Original 8-K solely for the purpose of updating the values in the table under the heading “Guidance – UK Operations Guidance” on page viii of the updated press release to include certain recently-acquired UK properties which were previously omitted.

The updated press release is furnished as Exhibit 99.1 and incorporated herein by reference.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Updated press release dated July 25, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: July 26, 2022By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20220725false000091259300009125932022-07-252022-07-25

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 200,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On July 25, 2022, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended June 30, 2022, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on July 26, 2022 to discuss the financial results for the period ended June 30, 2022.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated July 25, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: July 25, 2022By: /s/ Fernando Castro-Caratini Fernando Castro-Caratini, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20220425false000091259300009125932022-04-252022-04-25

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 200,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On April 25, 2022, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended March 31, 2022, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on April 26, 2022 to discuss the financial results for the period ended March 31, 2022.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated April 25, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: April 26, 2022By: /s/ Karen J. Dearing

Karen J. Dearing, Executive Vice President, Chief Financial Officer, Secretary and Treasurer

sui-20220221false000091259300009125932022-02-212022-02-21

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)

Maryland1-1261638-2730780 (State of Incorporation)Commission file number(I.R.S. Employer Identification No.)

27777 Franklin Rd.Suite 200,Southfield,Michigan 48034 (Address of Principal Executive Offices) (Zip Code)

(248) 208-2500 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value SUI New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition

On February 21, 2022, Sun Communities, Inc. (the "Company") issued a press release, furnished as Exhibit 99.1 and incorporated herein by reference, announcing its financial results for the period ended December 31, 2021, and certain other information.

The Company will hold an investor conference call and webcast at 11:00 a.m. ET on February 22, 2022 to discuss the financial results for the period ended December 31, 2021.

The information contained in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d)        Exhibits.

Exhibit No. Description

99.1Press release dated February 21, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

SUN COMMUNITIES, INC.

Dated: February 22, 2022By: /s/ Karen J. Dearing

Karen J. Dearing, Executive Vice President, Chief Financial Officer, Secretary and Treasurer