CubeSmart (NYSE: CUBE) CEO reports option exercise and insider stock sales

Rhea-AI Filing Summary

CubeSmart’s CEO and director reported several insider transactions in the company’s common stock. On 12/12/2025, the executive exercised a stock option for 87,604 shares at $30.32 per share and received common stock, then sold 46,925 shares at $36.55. On 12/15/2025, an additional 679 shares were sold at $36.5459.

Following these transactions, the executive directly beneficially owned 581,191 common shares. The filing also reports indirect ownership of 263,838 shares through a spousal trust, 2,698 shares through a second spousal trust, and 20,265 shares held in another trust. The exercised option originally covered 87,604 shares at a $30.32 exercise price and carried an expiration date of 01/21/2026, and is now fully exercised with no derivative securities remaining.

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

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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^*

MARR CHRISTOPHER P

(Last) (First) (Middle)

5 OLD LANCASTER ROAD

(Street)

MALVERN PA 19355

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CubeSmart [ CUBE ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
12/12/2025

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

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

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

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	12/12/2025		M		87,604	A	$30.32	628,795	D
Common	12/12/2025		S		46,925	D	$36.55	581,870	D
Common	12/15/2025		S		679	D	$36.5459	581,191	D
Common								263,838	I	By Spousal Trust
Common								2,698	I	By Spousal Trust #2
Common								20,265	I	Held in Trust

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
Stock Option (right to buy)	$30.32	12/12/2025		M			87,604	(1)	01/21/2026	Common	87,604	$0.0000	0.0000	D

Explanation of Responses:

1. The original stock option for 87,604 shares became exercisable in three equal installments on January 22, 2017, 2018, and 2019.

	Douglas J. Tyrell, Attorney-in-Fact	12/15/2025
	** Signature of Reporting Person	Date
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FAQ

What insider transactions did CubeSmart (CUBE) report for its CEO?

The CEO and director of CubeSmart reported exercising a stock option for 87,604 common shares at $30.32 on 12/12/2025, then selling 46,925 shares at $36.55 that same day and 679 shares at $36.5459 on 12/15/2025.

How many CubeSmart shares does the CEO hold after these transactions?

After the reported trades, the CEO directly beneficially owned 581,191 CubeSmart common shares. The filing also lists indirect holdings through several trusts.

What indirect CubeSmart shareholdings does the CEO report?

The CEO reports indirect beneficial ownership of 263,838 shares through a spousal trust, 2,698 shares through a second spousal trust, and 20,265 shares held in another trust.

What were the terms of the CubeSmart stock option exercised by the CEO?

The derivative was a stock option (right to buy) for 87,604 shares at an exercise price of $30.32 per share, with an expiration date of 01/21/2026. It is now fully exercised with no derivative securities remaining.

When did the CubeSmart stock option originally become exercisable?

According to the explanation, the original stock option for 87,604 shares became exercisable in three equal installments on January 22, 2017, January 22, 2018, and January 22, 2019.