[Form 4] Curbline Properties Corp. Insider Trading Activity

Rhea-AI Filing Summary

Curbline Properties Corp. executive John M. Cattonar reported a tax-related share disposition and updated equity holdings. He transferred 1,893 shares of common stock at $27.25 per share to cover tax withholding, leaving him with 147,458 common shares held directly.

He also reported 5,740 LTIP Units held directly. According to the terms, each LTIP Unit can be converted into a partnership common unit, which may then be redeemed for either one share of Curbline common stock or cash at the issuer’s election, with no expiration dates on these rights.

Footnotes state these LTIP Units represent an annual grant under Mr. Cattonar’s employment agreement and vest ratably over the first four anniversaries of the grant date, subject to his continued employment with the company.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Cattonar John M

Role EVP & Chief Investment Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,893	$27.25	$52K
holding	LTIP Units	--	--	--

Holdings After Transaction: Common Stock — 147,458 shares (Direct); LTIP Units — 5,740 shares (Direct)

Footnotes (1)

1. Reflects a class of limited partnership units in Curbline Properties LP ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes and vesting, each LTIP Unit may be converted into a common unit in Curbline Properties LP (a "Common Unit"). Each Common Unit acquired upon conversion of an LTIP Unit may be redeemed for one share of Issuer common stock or cash, at the election of the Issuer. The right to convert LTIP Units into Common Units and to redeem Common Units for cash or shares of Issuer common stock do not have expiration dates Annual grant of LTIP Units made in accordance with the terms of Mr. Cattonar's Assigned Employment Agreement dated as of September 1, 2024, as amended by the First Amendment thereto dated as of September 26, 2025 (the "Employment Agreement"). These LTIP Units vest ratably on the first four anniversaries of the grant date, subject generally to Mr. Cattonar's continued employment with the Issuer

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Form 4 Insider Transactions: What Each Field Means →

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^*

Cattonar John M

(Last) (First) (Middle)

320 PARK AVENUE

(Street)

NEW YORK NY 10022

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Curbline Properties Corp. [ CURB ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & Chief Investment Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/22/2026

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 Stock	02/22/2026		F		1,893	D	$27.25	147,458	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
LTIP Units	(1)							(2)	(1)	Common Stock	5,740		5,740	D

Explanation of Responses:

1. Reflects a class of limited partnership units in Curbline Properties LP ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes and vesting, each LTIP Unit may be converted into a common unit in Curbline Properties LP (a "Common Unit"). Each Common Unit acquired upon conversion of an LTIP Unit may be redeemed for one share of Issuer common stock or cash, at the election of the Issuer. The right to convert LTIP Units into Common Units and to redeem Common Units for cash or shares of Issuer common stock do not have expiration dates

2. Annual grant of LTIP Units made in accordance with the terms of Mr. Cattonar's Assigned Employment Agreement dated as of September 1, 2024, as amended by the First Amendment thereto dated as of September 26, 2025 (the "Employment Agreement"). These LTIP Units vest ratably on the first four anniversaries of the grant date, subject generally to Mr. Cattonar's continued employment with the Issuer

	/s/ Jennifer Daubenspeck, Attorney-In-Fact	02/24/2026
	** 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.