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 923, 2026

(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 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 54.0201 ~~Departure~~Changes ofin ~~Directors~~Registrant’s orCertifying ~~Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers~~Accountant.

~~Appointment~~On March 23, 2026, the Audit Committee (the "Committee") of ~~John~~the BBoard of Directors of Sun Communities, Inc. ~~McLaren~~(the “Company”) approved the appointment of Deloitte & Touche LLP (“Deloitte”) as ~~Chief~~the ~~Operating~~new ~~Officer;~~independent ~~Amended~~registered ~~and~~public ~~Restated~~accounting ~~Employment~~firm ~~Agreement~~for the Company for the fiscal year ending December 31, 2026. Subject to completion of its customary client acceptance procedures, Deloitte’s appointment is effective on the day the Company files its Quarterly Report on Form 10-Q for the quarter ending March 31, 2026 (the “Effective Date”).

OnDuring ~~March~~the 9,fiscal ~~2026~~years ended December 31, ~~Sun~~2025 ~~Communities~~and 2024, ~~Inc.~~and (for the “subsequent interim period preceding Deloitte’s appointment, the Company” did not, nor did anyone on its behalf, consult with Deloitte with respect to (a) ~~appointed~~the ~~John~~application B.of ~~McLaren~~accounting principles to a specified transaction, either completed or proposed, or the type of audit opinion that might be rendered on the Company’s ~~current~~consolidated ~~President~~financial statements, asand ~~its~~no ~~Chief~~written ~~Operating~~report ~~Officer.~~or Inoral ~~his~~advice ~~role~~was provided to the Company that Deloitte concluded was an important factor considered by the Company in reaching a decision as ~~Chief~~to ~~Operating~~any ~~Officer~~accounting, ~~Mr.~~auditing ~~McLaren~~or ~~has~~financial ~~assumed~~reporting ~~additional~~issue ~~responsibilities~~or ~~directly~~(b) ~~overseeing~~any matter that was either the ~~Company’s~~subject ~~operations~~of ~~team~~a disagreement (as defined in Item 304(a)(1)(iv) of Regulation S-K and the related instructions) or a reportable event (as described in Item 304(a)(1)(v) of Regulation S-K).

~~Mr.~~In ~~McLaren,~~connection ~~age~~with ~~55, has served~~ the ~~Company~~Committee’s indetermination ~~various~~to ~~roles~~appoint ~~for~~Deloitte, 24on ~~years.~~March He23, ~~has~~2026, ~~been~~ the ~~President~~Committee ofdismissed ~~the~~Grant ~~Company~~Thornton ~~since~~LLP ~~November~~(“Grant ~~2024.~~Thornton”) ~~From~~as ~~November 2022 to November 2024, he served~~ the Company’s asindependent aregistered ~~senior~~public ~~advisor.~~accounting ~~Previously~~firm, heeffective ~~served~~upon ascompletion of the ~~Company’~~current engagement's ~~President~~services ~~from~~for ~~2014~~the toperiod ~~2022~~ended ~~and~~March ~~its~~31, ~~Chief Operating Officer from 2008 to 2022~~2026.

~~Mr.~~The ~~McLaren~~audit ~~does~~reports ~~not~~of ~~have~~Grant ~~any~~Thornton ~~family~~on ~~relationships~~the ~~with~~consolidated ~~any~~financial statements of the Company’s ~~directors~~for oreach ~~executive~~of ~~officers~~the ~~and~~past istwo ~~not~~fiscal ayears ~~party~~ended toDecember ~~any~~31, ~~transactions~~2025 ~~listed~~and ~~in Item 404(a) of Regulation S-K. Further~~2024, nodid ~~arrangement~~not orcontain ~~understanding~~an ~~exists~~adverse ~~between~~opinion ~~Mr. McLaren~~ or ~~any~~a ~~other~~disclaimer ~~person~~of ~~pursuant~~opinion toand ~~which~~were ~~Mr.~~not ~~McLaren~~qualified ~~was~~or ~~appointed~~modified as ~~the~~to ~~Company’s~~uncertainty, ~~principal~~audit ~~operating~~scope, ~~officer~~or accounting principles.

OnDuring ~~March~~the 9Company’s two most recent fiscal years ended December 31, ~~2026~~2025 and 2024, and for the ~~Company~~subsequent ~~and~~interim ~~its~~period ~~operating~~preceding ~~subsidiary~~the date of the Form 8-K, ~~Sun~~(i) ~~Communities~~there ~~Operating~~were ~~Limited~~no ~~Partnership~~disagreements (within the ~~“Operating~~meaning ~~Partnership”~~of Item 304(a)(1)(iv) of Regulation S-K) with Grant Thornton on any matter of accounting principles or practices, ~~entered~~financial ~~into~~statement andisclosure, ~~Amended~~or auditing scope or procedure that if not resolved to Grant Thornton’s satisfaction, would have caused Grant Thornton to make reference thereto in its reports; and ~~Restated~~(ii) ~~Employment~~there ~~Agreement~~were no reportable events (~~the~~as ~~“Employment~~defined ~~Agreement”~~by Item 304(a)(1)(v) ~~with~~of ~~Mr.~~Regulation ~~McLaren.~~S-K), ~~The~~except ~~initial~~for ~~term~~the previously disclosed material weakness in the Company's internal control over financial reporting as of December 31, 2024, which was remediated in 2025, relating to the ~~Employment~~lack ~~Agreement~~of isan ~~for~~effective ~~three~~risk ~~years~~assessment process that defined clear financial reporting objectives, that identified and isevaluated ~~automatically~~risks ~~renewable~~of ~~for~~misstatement ~~successive~~due ~~one-year~~to ~~terms~~errors ~~unless~~over ~~either~~certain ~~party~~financial ~~timely~~reporting ~~terminates~~processes, or that developed internal controls to mitigate those risks. The Company has authorized Grant Thornton to respond fully to the ~~agreement~~inquiries of the successor auditor concerning the subject matter of this reportable event.

~~Mr.~~The ~~McLaren’s~~Company ~~annual~~provided ~~base~~Grant ~~salary~~Thornton ~~under~~with ~~the~~a ~~Employment~~copy ~~Agreement~~of isthe ~~$600,000.~~disclosures Incontained ~~addition~~in tothis ~~his~~Current ~~base~~Report ~~salary,~~on ~~Mr.~~Form ~~McLaren~~8-K isand ~~eligible~~requested tothat ~~receive~~Grant anThornton ~~annual~~furnish ~~cash~~the ~~bonus~~Company atwith a ~~target~~letter ~~amount~~addressed ofto ~~150%~~the ofSecurities ~~his base salary~~ and ~~the~~Exchange ~~earned~~Commission ~~amount~~stating ~~for~~whether ~~each~~it ~~year~~agrees ~~will~~with bethe ~~determined~~statements bycontained ~~the~~herein. ~~Compensation~~A ~~Committee~~copy of ~~the~~Grant ~~Company~~Thornton’s ~~Board of Directors~~letter, ~~based~~dated onMarch ~~individual~~27, ~~goals and objectives for Mr. McLaren~~2026, ~~the~~is ~~Company’s~~filed ~~performance~~as orExhibit ~~other relevant criteria~~16.1 ~~Incentive compensation paid or payable~~ to ~~Mr.~~this ~~McLaren~~Current ~~may~~Report beon ~~subject~~Form ~~to the Company’s Executive Compensation Recovery (Clawback) Policy in accordance with its terms~~8-K.

As previously disclosed, pursuant to a restricted stock award agreement dated November 6, 2024 (the “2024 Award Agreement”), the Company granted Mr. McLaren 50,000 shares of restricted common stock (the “2024 Restricted Shares”), which includes 30,000 shares (the “2024 Performance Vesting Shares”) that are subject to performance vesting based on certain market performance criteria during the three years ending December 31, 2027. Consistent with the terms of the 2024 Award Agreement, under the Employment Agreement if Mr. McLaren resigns without good reason or his employment is otherwise terminated under certain circumstances after November 6, 2026, he may retain some or all of the 2024 Restricted Shares.

If Mr. McLaren is terminated by the Company without cause or resigns for good reason (each as defined in the Employment Agreement) or if he dies or becomes disabled, subject to execution of a release and compliance with his noncompetition and confidentiality obligations: (i) he will receive payments equal to 1.50 times the sum of his then-current base salary and then-current target bonus amount, in the case of a termination without cause or a resignation for good reason, or 2.00 times his then-current base salary (less the value of any previously paid disability benefits), in the case of a termination upon death or disability; (ii) all time-vesting equity awards granted under the Company’s 2015 Equity Incentive Plan (the “2015 Incentive Plan”) and the 2024 Performance Vesting Shares (except to the extent forfeited in whole or part before the effective date of such termination and except as provided in the 2024 Award Agreement) will become fully vested; (iii) the acceleration, forfeiture or vesting of all other performance-vesting equity awards under the 2015 Incentive Plan will be governed by the terms of the applicable award agreement; and (iv) the Company will continue to provide him with group health benefits for up to one year.

If there is a change in control (as defined in the Employment Agreement) of the Company and either: (i) the Company or its successor terminates the Employment Agreement without cause within 60 days before or 24 months after the date of the change in control; (ii) Mr. McLaren terminates his employment for good reason within 60 days before or 24 months after the date of the change in control; or (iii) the form of the change in control transaction is a sale of all or substantially all of the Company’s assets and the Company or its successor does not expressly assume the Employment Agreement, subject to execution of a release and compliance with his noncompetition and confidentiality obligations, then (i) he will receive a change in control payment equal to 2.00 times the sum of his then-current base salary and then-current target bonus amount, (ii) his equity awards will be treated as described in the preceding paragraph, and (iii) he will be entitled to continued health coverage benefits as described in the preceding paragraph.

The non-competition provisions of the Employment Agreement generally preclude Mr. McLaren from engaging, directly or indirectly, in the same business as the Company, anywhere in the U.S. or any other country in which the Company operates for a period ending three years following the termination of his employment.

The foregoing description of the Employment Agreement and the 2024 Award Agreement does not purport to be complete and is subject to, and qualified in its entirety by, the full text of such agreements, copies of which are attached hereto as Exhibit 10.1 and 10.2, respectively, and the terms of which are incorporated by reference herein.

Departure of Bruce D. Thelen as Chief Operating Officer

On March 9, 2026, Bruce D. Thelen departed from his role as Executive Vice President and Chief Operating Officer of the Company to focus on other opportunities.


Item 9.01			Financial Statements and Exhibits

(d) Exhibits.

Exhibit No.	Description	Method of Filing
10.1*	Amended and Restated Employment Agreement dated March 9, 2026 by and among Sun Communities, Inc., Sun Communities Operating Limited Partnership and John B. McLaren	Filed herewith
16.1	Letter of Grant Thornton LLP dated March 27, 2026	Filed herewith
10.2*#	Restricted Stock Award Agreement dated November 6, 2024, by and between Sun Communities, Inc. and John B. McLaren	Incorporated by reference to Exhibit 10.2 of Sun Communities Inc.'s Current Report on Form 8-K filed on November 7, 2024.
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)	Filed herewith

* Management contract or compensatory plan or arrangement

# Certain schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K because such schedules and exhibits do not contain information which is material to an investment decision or which is not otherwise disclosed in the filed agreements. The Company will furnish the omitted schedules and exhibits to the SEC upon request by the SEC.

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: March 9, 2026	By:	/s/ Fernando Castro-Caratini
Dated: March 27, 2026	By:	/s/ Fernando Castro-Caratini
		Fernando Castro-Caratini, Chief Financial Officer, Executive Vice President, Secretary and Treasurer

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