# EDGAR Filing Document

**Accession Number:** 0001171077
**File Stem:** 0000912593-25-000280
**Filing Date:** 2025-12
**Character Count:** 7478
**Document Hash:** 750d528563f88089f3b40e999fa369b2
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912593-25-000280.hdr.sgml**: 20251210

**ACCESSION NUMBER**: 0000912593-25-000280

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251209

**FILED AS OF DATE**: 20251210

**DATE AS OF CHANGE**: 20251210

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** SHIFFMAN GARY A
- **CENTRAL INDEX KEY:** 0001171077

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-12616
- **FILM NUMBER:** 251562962

**MAIL ADDRESS:**
- **STREET 1:** 27777 FRANKLIN ROAD
- **STREET 2:** STE 200
- **CITY:** SOUTHFIELD
- **STATE:** MI
- **ZIP:** 48034
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SUN COMMUNITIES INC
- **CENTRAL INDEX KEY:** 0000912593
- **STANDARD INDUSTRIAL CLASSIFICATION:** REAL ESTATE INVESTMENT TRUSTS [6798]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 382730780
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 0513

**BUSINESS ADDRESS:**
- **STREET 1:** 27777 FRANKLIN ROAD
- **STREET 2:** SUITE 300
- **CITY:** SOUTHFIELD
- **STATE:** MI
- **ZIP:** 48034
- **BUSINESS PHONE:** 2482082500

**MAIL ADDRESS:**
- **STREET 1:** 27777 FRANKLIN ROAD
- **STREET 2:** SUITE 300
- **CITY:** SOUTHFIELD
- **STATE:** MI
- **ZIP:** 48034

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>SHIFFMAN GARY A<br><sub>(Last) (First) (Middle)</sub><br>27777 FRANKLIN ROAD<br>SUITE 300<br><sub>(Street)</sub><br>SOUTHFIELD, MI 48034<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-12-09 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>SUN COMMUNITIES INC [ SUI ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| COMMON STOCK, $0.01 PAR VALUE | 2025-12-09 |  | M |  | 156875<sup>(1)</sup> | A | $0 | 156875 | I | Owned by irrevocable trust.<sup>(1)</sup> |
| COMMON STOCK, $0.01 PAR VALUE |  |  |  |  |  |  |  | 881175 | D |  |
| COMMON STOCK, $0.01 PAR VALUE |  |  |  |  |  |  |  | 6278 | I | Owned by spouse |
| COMMON STOCK, $0.01 PAR VALUE |  |  |  |  |  |  |  | 86800 | I | Owned by irrevocable trust.<sup>(2)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| COMMON OPERATING PARTNERSHIP UNITS | $0 | 2025-12-09 |  | M |  |  | 156875<sup>(1)</sup> | <sup>(3)</sup> | <sup>(3)</sup> | COMMON STOCK, $0.01 PAR VALUE | 156875 | $0 | 0 | I | Owned by irrevocable trust<sup>(1)</sup> |
| COMMON OPERATING PARTNERSHIP UNITS | $0 |  |  |  |  |  |  | <sup>(3)</sup> | <sup>(3)</sup> | COMMON STOCK, $0.01 PAR VALUE | 576222 |  | 576222 | I | Owned by certain LLC's<sup>(4)</sup> |

---

### Footnotes:

(1) This transaction represents the conversion of Common Operating Partnership Units of Sun Communities Operating Limited Partnership (the "Operating Partnership") reported in Table II into Common Stock of the Issuer reported in Table I. The Reporting Person is a trustee and a beneficiary of the irrevocable trust that owns these securities. The Reporting Person disclaims beneficial ownership of the securities held by the trust except to the extent of his pecuniary interest therein. This conversion was completed for tax planning reasons.

(2) Owned by an irrevocable trust of which the Reporting Person is a trustee and a beneficiary. The Reporting Person disclaims beneficial ownership of the securities held by the trust except to the extent of his pecuniary interest therein.

(3) The Common Operating Partnership Units of the Operating Partnership are convertible into Common Stock of the Issuer at any time on a one-for-one basis and have no expiration date.

(4) Owned by certain limited liability companies of which the Reporting Person is a member and a manager. The Reporting Person disclaims beneficial ownership of the securities held by these limited liability companies except to the extent of his pecuniary interest therein.

**Signature:** Gary A. Shiffman  
**Date:** 2025-12-10

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**