Alexander Otto holds 6.4% of Curbline Properties

Alexander Otto reports beneficial ownership of 7,411,219 shares of Curbline Properties Corp. common stock, representing 6.4% of the outstanding common stock.

Rhea-AI Filing Summary

Alexander Otto reports beneficial ownership of 7,411,219 shares of Curbline Properties Corp. common stock, representing 6.4% of the outstanding common stock. This percentage is based on 115,038,025 shares outstanding as of July 22, 2026, as reported by the company.

Otto holds sole voting and sole dispositive power over all 7,411,219 shares. In the last sixty days, he executed several open market sales, including 134,269 shares at a weighted average price of $30.11 on August 5, 2026, and 135,612 shares at a weighted average price of $30.15 on August 13, 2026.

Filing Explained

The amendment reports six open-market sales from August 4 through August 13, 2026, while Alexander Otto retains 7,411,219 shares and sole voting and dispositive power over them; the filing states those shares represent 6.4% of the outstanding common stock.

Key Figures

Beneficial ownership: 7,411,219 shares Ownership percentage: 6.4% Shares outstanding: 115,038,025 shares +3 more

6 metrics

Beneficial ownership 7,411,219 shares Shares of Curbline Properties Corp. common stock beneficially owned by Alexander Otto

Ownership percentage 6.4% Percent of Curbline Properties Corp. common stock represented by 7,411,219 shares

Shares outstanding 115,038,025 shares Curbline Properties Corp. common stock outstanding as of July 22, 2026

Sale on August 5, 2026 134,269 shares at $30.11 Open market sale at weighted average price with range $30.06–$30.25

Sale on August 13, 2026 135,612 shares at $30.15 Open market sale at weighted average price with range $30.00–$30.42

Sale price range (Aug 6, 2026) $29.75–$30.46 Price range for open market sale of 109,366 shares on August 6, 2026

Key Terms

beneficially owns, sole voting power, sole dispositive power, weighted average sale price, +1 more

5 terms

beneficially owns financial

"The Reporting Person beneficially owns 7,411,219 shares of Common Stock"

Beneficially owns means a person or entity enjoys the economic benefits and control of a security even if the legal title or registration is held in another name. Think of it like having the keys and profits from a car that is registered to a friend: you use it, benefit from it, and make decisions about it even though the official paperwork lists someone else. For investors, this matters because it reveals who truly controls shares, affects voting power, potential conflicts of interest, and regulatory disclosure obligations.

sole voting power financial

"Mr. Otto has sole voting power and sole dispositive power"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"Mr. Otto has sole voting power and sole dispositive power"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

weighted average sale price financial

"Reflects the weighted average sale price. The range of prices"

open market sale financial

"August 5, 2026 Open Market Sale 134,269 $30.11"

An open market sale is when a company or a shareholder sells shares through the regular stock market to any willing buyer, using ordinary exchange trading rather than private deals. It matters to investors because it increases the number of shares available and can push the price down or change ownership balance—think of it like someone putting extra items on a supermarket shelf for any shopper to buy, which can lower the item's price if supply suddenly grows.

FAQ

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

What percentage of Curbline Properties Corp. (CURB) does Alexander Otto currently beneficially own?

Alexander Otto beneficially owns 7,411,219 shares of Curbline Properties Corp., representing 6.4% of the company’s outstanding common stock, based on 115,038,025 shares outstanding as of July 22, 2026.

How many Curbline Properties Corp. (CURB) shares are outstanding for calculating Alexander Otto’s stake?

The ownership percentage is calculated using 115,038,025 shares of Curbline Properties Corp. common stock outstanding as of July 22, 2026, as reported in the company’s Form 10-Q filed on July 29, 2026.

Does Alexander Otto have sole or shared control over his CURB shares?

Alexander Otto has sole voting power and sole dispositive power over all 7,411,219 Curbline Properties Corp. shares he beneficially owns, meaning he alone can vote and decide on their disposition.

What recent open market sales of Curbline Properties Corp. (CURB) stock did Alexander Otto report?

Reported transactions include open market sales such as 134,269 shares at $30.11 on August 5, 2026, and 135,612 shares at $30.15 on August 13, 2026, along with several other August 2026 sales at prices near $30.

Over what price ranges were Alexander Otto’s recent CURB share sales executed?

The reported open market sales used weighted average sale prices, with individual trades occurring in ranges such as $30.05–$30.28, $30.06–$30.25, and $29.75–$30.46, depending on the specific transaction date.

Does anyone else have rights to dividends or sale proceeds from Alexander Otto’s CURB holdings?

To the best of the reporting person’s knowledge, no person other than Alexander Otto has the right to receive dividends or proceeds from the sale of the Curbline Properties Corp. securities he beneficially owns.

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

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Accepted by SEC EDGAR 08/14/2026 - 05:00 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 1)

Curbline Properties Corp.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

23128Q101

(CUSIP Number)

Julie A. Mediamolle
Alston & Bird LLP, 950 F Street, N.W.
Washington, DC, 20004
202-239-3702

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

08/12/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 23128Q101

1

Name of reporting person

Alexander Otto

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

WC, PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

GERMANY

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 7,411,219.00
8	Shared Voting Power
9	Sole Dispositive Power 7,411,219.00
10	Shared Dispositive Power

11

Aggregate amount beneficially owned by each reporting person

7,411,219.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

6.4 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

The calculation of the percentage of the class beneficially owned by the reporting person is based on 115,038,025 shares of common stock outstanding as of July 22, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q, filed with the SEC on July 29, 2026.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock, par value $0.01 per share
(b)	Name of Issuer: Curbline Properties Corp.
(c)	Address of Issuer's Principal Executive Offices: 320 Park Avenue, New York City, NEW YORK , 10022.
Item 1 Comment: This Amendment No. 1 ("Amendment No. 1") amends and supplements the Schedule 13D filed on October 8, 2024 (as amended, the "Schedule 13D") by Alexander Otto. Information reported in the Schedule 13D remains in effect except to the extent that it is amended, restated or superseded by information contained in this Amendment No. 1. Capitalized terms used and not defined in this Amendment No. 1 have the meanings set forth in the Schedule 13D.
Item 5.	Interest in Securities of the Issuer
(a)	The information contained in Item 5(a) of the Schedule 13D is hereby amended and supplemented as follows: The Reporing Person beneficially owns 7,411,219 shares of Common Stock, representing 6.4% of the Issuer's outstanding Common Stock (based on 115,038,025 shares of Common Stock outstanding as of July 22, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q, filed with the SEC on July 29, 2026).
(b)	With respect to any rights or powers to vote, or to direct the vote of, or to dispose of, or to direct the disposition of, the Common Stock referenced in paragraph 5(a), Mr. Otto has sole voting power and sole dispositive power with regard to 7,411,219 shares of Common Stock.
(c)	Other than as set forth below, the Reporting Person has not effected any transactions in the Common Stock in the last sixty days. Transaction Date Transaction Type Number of Shares Purchase Price August 4, 2026 Open Market Sale 38,788 $30.17 (1) August 5, 2026 Open Market Sale 134,269 $30.11 (2) August 6, 2026 Open Market Sale 109,366 $29.79 (3) August 7, 2026 Open Market Sale 20,475 $29.76 (4) August 12, 2026 Open Market Sale 96,311 $30.06 (5) August 13, 2026 Open Market Sale 135,612 $30.15 (6) (1) Reflects the weighted average sale price. The range of prices for such transaction is between $30.05 and $30.28. (2) Reflects the weighted average sale price. The range of prices for such transaction is between $30.06 and $30.25. (3) Reflects the weighted average sale price. The range of prices for such transaction is between $29.75 and $30.46. (4) Reflects the weighted average sale price. The range of prices for such transaction is between $29.75 and $29.81. (5) Reflects the weighted average sale price. The range of prices for such transaction is between $30.00 and $30.13. (6) Reflects the weighted average sale price. The range of prices for such transaction is between $30.00 and $30.42.
(d)	To the best knowledge of the Reporting Person, no person other than the Reporting Person has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities beneficially owned by the Reporting Person identified in this Item 5.
(e)	Not applicable.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Alexander Otto

Signature:	/s/ Frederic Arndts
Name/Title:	By: Frederic Arndts, managing director of KG CURA Vermogensverwaltung G.m.b.H. & Co Vice President and Senior Counsel, Capital Research and Management
Date:	08/14/2026