[Form 4] Curbline Properties Corp. Insider Trading Activity

Rhea-AI Filing Summary

Curbline Properties Corp. (CURB) Form 4 shows that John M. Cattonar, EVP & Chief Investment Officer and director, reported the sale of 1,746 shares of the company's common stock on 09/15/2025 at a price of $22.47 per share. After the transaction he beneficially owns 149,351 shares. The filing was signed by an attorney-in-fact on behalf of the reporting person.

Insights

Financial Analyst

TL;DR: Insider sale of 1,746 shares; holding remains large at 149,351 shares, suggesting continued substantial ownership.

The reported transaction is a routine Section 16 disclosure of a small open-market sale relative to the insider's total holdings. The sale size (1,746 shares at $22.47) is modest compared with the remaining 149,351 shares, so this report alone is unlikely to materially change control or signal a major shift in insider conviction. Investors typically view single, small sales as liquidity actions rather than definitive signals about company prospects.

Corporate Governance Expert

TL;DR: Filing is a standard, properly executed Form 4 disclosing an insider disposition and continuing substantial ownership.

The form identifies the reporting person, relationship to the issuer (EVP & Chief Investment Officer and director), transaction date, transaction code (F indicating a sale), number of shares sold, sale price, and post-transaction beneficial ownership. The document appears complete and was signed by an authorized attorney-in-fact, meeting Section 16 reporting requirements. There are no indications of unusual derivative activity or changes in board/officer status in this filing.

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
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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^*

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)
09/15/2025

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 Stock	09/15/2025		F		1,746	D	$22.47	149,351	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

Explanation of Responses:

	/s/ Jennifer Daubenspeck, Attorney-In-Fact	09/15/2025
	** 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.

FAQ

What did CURB insider John M. Cattonar report on Form 4?

He reported a sale of 1,746 common shares on 09/15/2025 at $22.47 per share and now beneficially owns 149,351 shares.

How many shares does John M. Cattonar own after the reported transaction for CURB?

149,351 shares of Curbline Properties Corp. common stock are reported as beneficially owned following the sale.

What was the sale price per share reported on the CURB Form 4?

$22.47 per share for the 1,746 shares sold on 09/15/2025.

What is the relationship of the reporting person to CURB?

John M. Cattonar is EVP & Chief Investment Officer and a director of Curbline Properties Corp., as disclosed on the Form 4.

Was the Form 4 properly signed for the CURB filing?

Yes. The filing shows it was signed by an attorney-in-fact, Jennifer Daubenspeck, dated 09/15/2025.