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  4. [Form 4] Curbline Properties Corp. Insider Trading Activity

Curbline Properties (CURB) director sells 145K shares with no 10b5-1 plan disclosed

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Curbline Properties Corp. (CURB) director Otto Alexander reported two open-market sales of common stock. On August 14, 2026, he sold 136,226 shares at a weighted average price of $30.25, with individual prices ranging from $30.03 to $30.42. On August 17, 2026, he sold an additional 9,173 shares at a weighted average price of $30.04, with individual prices ranging from $30.00 to $30.23. The sales were executed through a broker-dealer in multiple same-way transactions aggregated within one-dollar price ranges, and the Rule 10b5-1 checkbox was not marked.

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Insider Otto Alexander
Role Director
Sold 145,399 shs ($4.40M)
Type Security Shares Price Value
Sale Common Stock F1, F3 9,173 $30.04 $276K
Sale Common Stock F1, F2 136,226 $30.25 $4.12M
Holdings After Transaction: Common Stock — 7,265,820 shares (Direct)
Footnotes (3)
  1. F1. The reporting person effected multiple same-way open market sale transactions on the same day at different prices through a sale order executed by a broker-dealer. The reporting person reported on a single line all such transactions that occurred within a one dollar price range. The reporting person hereby undertakes to provide upon request by the SEC staff, the issuer, or a shareholder of the issuer, full information regarding the number of shares sold at each separate price.
  2. F2. Reflects the weighted average sale price. The range of prices for such transaction is between $30.03 and $30.42.
  3. F3. Reflects the weighted average sale price. The range of prices for such transaction is between $30.00 and $30.23.
Shares sold August 14, 2026 136,226 shares Open-market sale of CURB common stock by director Otto Alexander
Weighted average price August 14, 2026 $30.25 per share Aggregated trades with individual prices between $30.03 and $30.42
Shares sold August 17, 2026 9,173 shares Open-market sale of CURB common stock by director Otto Alexander
Weighted average price August 17, 2026 $30.04 per share Aggregated trades with individual prices between $30.00 and $30.23
Total shares sold 145,399 shares Sum of both reported sales in this Form 4
Sell transactions count 2 transactions Number of non-derivative sale entries reported
weighted average sale price financial
"Reflects the weighted average sale price."
open market sale transactions financial
"multiple same-way open market sale transactions on the same day"
broker-dealer financial
"through a sale order executed by a broker-dealer"
A broker-dealer is a licensed firm or individual that both executes trades on behalf of clients (acting as a broker) and buys or sells securities for its own account (acting as a dealer). Investors care because broker-dealers provide the plumbing of markets — they place orders, hold or move cash and securities, offer research or advice, and their stability and fees directly affect trade execution, costs, and the safety of client funds; think of them as a combined travel agent and taxi for your investments.

FAQ

What insider transactions did CURB director Otto Alexander report in this Form 4?
Otto Alexander reported two open-market sales of Curbline Properties Corp. common stock totaling 145,399 shares. The sales occurred on August 14, 2026 and August 17, 2026, executed through a broker-dealer in multiple aggregated trades.

How many CURB shares did Otto Alexander sell on August 14, 2026 and at what price?
On August 14, 2026, Otto Alexander sold 136,226 CURB shares at a weighted average price of $30.25. Individual trade prices for this aggregated transaction ranged between $30.03 and $30.42, all executed as open-market sales through a broker-dealer.

What were the details of Otto Alexander’s CURB share sale on August 17, 2026?
On August 17, 2026, Otto Alexander sold 9,173 CURB shares at a weighted average price of $30.04. The underlying trades were executed in the open market at prices ranging from $30.00 to $30.23, aggregated into one reported transaction line.

Were Otto Alexander’s CURB stock sales executed under a Rule 10b5-1 trading plan?
The Form 4 indicates the Rule 10b5-1 checkbox was not checked, so these sales were not affirmed as being made under a Rule 10b5-1 trading plan. No separate footnote describes any pre-arranged trading arrangement.

How many CURB shares did Otto Alexander sell in total according to this Form 4?
In total, Otto Alexander sold 145,399 CURB common shares across the two reported dates. This total consists of 136,226 shares sold on August 14, 2026 and 9,173 shares sold on August 17, 2026, all as open-market transactions.

How were the sale prices for Otto Alexander’s CURB transactions calculated and reported?
Each transaction’s reported price is a weighted average sale price across multiple trades. For August 14, the price range was $30.03–$30.42; for August 17, it was $30.00–$30.23. Detailed per-trade prices are available on request from specified parties.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
Otto Alexander
(Last)(First)(Middle)
KG CURA VERMOGENSVERWALTUNG G.M.B.H.&CO.
SASELER DAMM 39 A
(Street)
HAMBURGGERMANYD-22395
(City)(State)(Zip)
GERMANY
(Country)		2. Issuer Name and Ticker or Trading Symbol
Curbline Properties Corp. [ CURB ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock08/14/2026S136,226D$30.25(1)(2)7,274,993D
Common Stock08/17/2026S9,173D$30.04(1)(3)7,265,820D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The reporting person effected multiple same-way open market sale transactions on the same day at different prices through a sale order executed by a broker-dealer. The reporting person reported on a single line all such transactions that occurred within a one dollar price range. The reporting person hereby undertakes to provide upon request by the SEC staff, the issuer, or a shareholder of the issuer, full information regarding the number of shares sold at each separate price.
2. Reflects the weighted average sale price. The range of prices for such transaction is between $30.03 and $30.42.
3. Reflects the weighted average sale price. The range of prices for such transaction is between $30.00 and $30.23.
/s/ Frederic Arndts, managing director of KG CURA Vermogensverwaltung G.m.b.H. & Co., For: Alexander Otto08/18/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR