Sun Communities CEO delivered or withheld 3,393 shares

The reported post-transaction common-stock position was 74,084 shares, with 28,151 performance rights also listed.

Rhea-AI Filing Summary

Sun Communities Inc. CEO & Director Charles D. Young reported 3,393 common shares delivered or withheld for payment of exercise price or tax liability on October 1, 2026. His reported direct common-stock holdings afterward were 74,084 shares; the reported price was $110.00 per share.

The filing also lists 28,151 performance rights, each a contingent right to one common share. Between 0% and 200% of target shares may be earned based on total shareholder return relative to industry indices and certain financial results over a three-year performance period; unvested shares are forfeited.

Insider Trade Summary

Exercise Price or Tax Liability: 3,393 shares

Exercise Price or Tax Liability 2 txns

Insider Young Charles D.

Role CEO & Director

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	COMMON STOCK, $0.01 PAR VALUE	3,393	$110.00	$373K
holding	PERFORMANCE RIGHT F1	--	--	--

Holdings After Transaction: COMMON STOCK, $0.01 PAR VALUE — 74,084 shares (Direct); PERFORMANCE RIGHT — 28,151 contracts (Direct)

Footnotes (1)

1. F1. Each performance right represents a contingent right to receive one share of common stock of Sun Communities, Inc (the "Company"). The target number of shares of common stock is set forth in column 7 of Table II. Between 0% and 200% of the target number will be earned based on the achievement of performance criteria related to the Company's total shareholder return relative to industry indices and to certain of the Company's financial results over a three-year performance period. Any shares that do not vest at the end of the performance period will be forfeited.

Key Figures

Shares delivered or withheld: 3,393 shares Reported price per share: $110.00 per share Direct common-stock holdings afterward: 74,084 shares +3 more

6 metrics

Shares delivered or withheld 3,393 shares For payment of exercise price or tax liability on October 1, 2026

Reported price per share $110.00 per share Transaction dated October 1, 2026

Direct common-stock holdings afterward 74,084 shares Charles D. Young's reported position after the transaction

Performance rights 28,151 rights Each represents a contingent right to receive one common share

Performance-right target range 0% to 200% of target Based on the stated performance criteria

Performance period Three years Period for the performance-right criteria

Key Terms

performance right, total shareholder return, performance period, forfeited

4 terms

performance right financial

"Each performance right represents a contingent right to receive one share of common stock"

total shareholder return financial

"performance criteria related to the Company's total shareholder return relative to industry indices"

Total shareholder return is the overall gain an investor gets from owning a stock, combining changes in the share price plus any cash payouts like dividends, and assuming those payouts are reinvested in more shares. Investors use it like a single score that shows the true return on their investment—similar to checking both the growth of a savings account and the interest earned—to compare how well different companies or investments perform over time.

performance period technical

"over a three-year performance period"

The performance period is the specific time span over which an investment’s results, an employee’s targets, or a fund’s returns are measured and judged. It matters to investors because the length and start/end of that window determine which gains or losses count toward performance fees, bonus payouts, or benchmark comparisons—much like timing a race decides who wins, the chosen period can change whether results look strong or weak.

forfeited technical

"Any shares that do not vest at the end of the performance period will be forfeited"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many SUI shares did Charles D. Young deliver or withhold?

On October 1, 2026, 3,393 common shares were delivered or withheld for payment of exercise price or tax liability; Charles D. Young's reported direct common-stock holdings afterward were 74,084 shares. The transaction row reports $110.00 per share.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/02/2026 - 04:02 PM Accepted by SEC EDGAR 10/02/2026 - 04:02 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Young Charles D.

(Last) (First) (Middle)

27777 FRANKLIN RD. SUITE 300

(Street)

SOUTHFIELD MICHIGAN 48034

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SUN COMMUNITIES INC [ SUI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO & Director

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
COMMON STOCK, $0.01 PAR VALUE	10/01/2026		F		3,393	D	$110	74,084	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
PERFORMANCE RIGHT	(1)							(1)	(1)	COMMON STOCK, $0.01 PAR VALUE	28,151		28,151	D

Explanation of Responses:

1. Each performance right represents a contingent right to receive one share of common stock of Sun Communities, Inc (the "Company"). The target number of shares of common stock is set forth in column 7 of Table II. Between 0% and 200% of the target number will be earned based on the achievement of performance criteria related to the Company's total shareholder return relative to industry indices and to certain of the Company's financial results over a three-year performance period. Any shares that do not vest at the end of the performance period will be forfeited.

Remarks:

	/s/ Charles D. Young	10/02/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)