Curbline EVP delivers 2,472 shares for taxes

Curbline Properties Corp.’s chief investment officer reported a routine share withholding transaction for option exercise price or tax obligations.

Rhea-AI Filing Summary

Curbline Properties Corp. (CURB) reported that EVP & Chief Investment Officer John M. Cattonar had 2,472 shares of common stock withheld or delivered on September 15, 2026 to satisfy exercise price or tax liability. Following this code F transaction, he holds 180,717 shares of common stock directly.

Insider Trade Summary

Exercise Price or Tax Liability: 2,472 shares

Exercise Price or Tax Liability 1 txn

Insider Cattonar John M

Role EVP & Chief Investment Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	2,472	$29.08	$72K

Holdings After Transaction: Common Stock — 180,717 shares (Direct)

Key Figures

Shares delivered/withheld: 2,472 shares Transaction price per share: $29.08 per share Shares held after transaction: 180,717 shares +1 more

4 metrics

Shares delivered/withheld 2,472 shares Common stock used for payment of exercise price or tax liability on September 15, 2026

Transaction price per share $29.08 per share Price associated with the 2,472-share code F transaction

Shares held after transaction 180,717 shares Directly held common stock by John M. Cattonar following the transaction

Exercise price or tax-liability shares 2,472 shares Shares reported under code F for payment of exercise price or tax liability

Key Terms

exercise price, tax liability, withholding securities

3 terms

exercise price financial

"Payment of exercise price or tax liability by delivering or withholding securities"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

tax liability financial

"Payment of exercise price or tax liability by delivering or withholding securities"

withholding securities financial

"Payment of exercise price or tax liability by delivering or withholding securities"

FAQ

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

What insider transaction did CURB report for John M. Cattonar?

Curbline Properties Corp. reported that John M. Cattonar had 2,472 shares of common stock delivered or withheld on September 15, 2026 as payment of exercise price or tax liability, categorized as a code F transaction.

How many CURB shares does John M. Cattonar hold after this transaction?

After the September 15, 2026 transaction, John M. Cattonar directly holds 180,717 shares of Curbline Properties Corp. common stock, as reported in the Form 4 filing.

Was the CURB insider transaction a market sale or purchase?

No. The Form 4 classifies the transaction as a code F disposition, meaning 2,472 shares were delivered or withheld to pay exercise price or tax liability, rather than an open-market sale or purchase.

What price per share is associated with the CURB insider transaction?

The filing reports a transaction price of $29.08 per share for the 2,472 shares used to satisfy exercise price or tax liability in the September 15, 2026 transaction.

Is the CURB insider transaction reported under a Rule 10b5-1 trading plan?

No. The filing indicates that the Rule 10b5-1 checkbox is not selected, so the September 15, 2026 transaction is not affirmed as being made under a Rule 10b5-1 trading plan.

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

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Available on EDGAR 09/15/2026 - 04:05 PM Accepted by SEC EDGAR 09/15/2026 - 04:05 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^*

Cattonar John M

(Last) (First) (Middle)

320 PARK AVENUE

(Street)

NEW YORK NEW YORK 10022

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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	09/15/2026		F		2,472	D	$29.08	180,717	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	09/15/2026
	** 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)