Comparable stake leader
BlackRock, Inc.
SEC ownership of Curbline Properties Corp.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002027317.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
12 Aug 2026
- Public ticker
- CURB on NYSE
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
12 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002027317
- Issuer location
- New York, NY
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Curbline Properties Corp. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
12 Aug 2026
13F
13D/G
3/4/5
Lead comparable stake: 15%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 15%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
15%
VANGUARD GROUP INC
14%
T. Rowe Price Investment Manageme...
13%
Alexander Otto
6.4%
STATE STREET CORP
5.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
15%
from 13D/G
|
$531,338,324
17,478,234 shares
|
— | 30 Jun 2026 |
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
14%
|
$343,053,172
14,793,151 shares
|
$0 | 31 Dec 2024 |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
Company
|
13%
from 13D/G
|
$405,010,000
13,322,680 shares
|
— | 30 Jun 2026 |
| Alexander Otto |
13D/G
3/4/5
Director
|
6.4%
|
$225,375,170
7,411,219 shares
|
$0 | 12 Aug 2026 |
| STATE STREET CORP |
13F
13D/G
Company · STATE STREET CORPORATION
|
5.3%
from 13D/G
|
$169,625,938
5,549,842 shares
|
— | 30 Jun 2026 |
| FMR LLC |
13D/G
13F
Company
|
4%
|
$116,538,790
4,273,516 shares
|
-$34,172,746 | 31 Mar 2026 |
| Conor Fennerty |
3/4/5
EVP, CFO & Treasurer
|
0.13%
|
$4,676,063
153,909 shares
|
-$1,674,200 | 30 Jul 2026 |
| Christina M. Yarian |
3/4/5
SVP & Chief Accounting Officer
|
0.02%
|
$693,839
25,462 shares
|
— | 22 Feb 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$39,228,314.
Buys
$0
Insiders: 0
Sells
$39,228,314
Insiders: 3
Net
-$39,228,314
Shares: -1,316,295
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 1,316,295
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 1,192,883 | $0 | $35,918,486 | -$35,918,486 |
| 3-6 | 0 | 123,412 | $0 | $3,309,828 | -$3,309,828 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-12 of 12 reporting-owner rows connected to Curbline Properties Corp.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
12
Largest Forms 3/4/5 holder
Alexander Otto
Net 12M change
-$39,228,313
Latest report
27 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Alexander Otto | Director | $204,588,874 | -$34,244,285 | -14% | Filing P/S | 27 Aug 2026 |
| David R. Lukes | President & CEO, Director | $18,476,989 | -$3,309,828 | -15% | Mixed | 11 May 2026 |
| John M. Cattonar | EVP & Chief Investment Officer | $4,859,678 | Mixed | 25 Jun 2026 | ||
| Conor Fennerty | EVP, CFO & Treasurer | $4,676,063 | -$1,674,200 | -26% | Filing P/S | 30 Jul 2026 |
| Barry A. Sholem | Director | $2,680,185 | Mixed | 15 Oct 2024 | ||
| Terrance R. Ahern | Director | $1,671,534 | Mixed | 15 Oct 2024 | ||
| Jane E. DeFlorio | Director | $1,035,008 | Mixed | 15 Oct 2024 | ||
| Linda B. Abraham | Director | $879,299 | Mixed | 15 Oct 2024 | ||
| Christina M. Yarian | SVP & Chief Accounting Officer | $693,839 | Mixed | 22 Feb 2026 | ||
| Lesley H. Solomon | EVP & General Counsel | $629,468 | Mixed | 08 Apr 2026 | ||
| Victor B. MacFarlane | Director | $425,472 | Mixed | 15 Oct 2024 | ||
| SITE Centers Corp. | 10%+ Owner | Mixed | 01 Oct 2024 |
Recent insider transactions for Curbline Properties Corp.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Alexander Otto | CURB | Common Stock | Sale | -0.05% | $108,180 | $30.05 | -3,600 | 6,808,282 | 31 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -1.59% | $3,316,436 | $30.11 | -110,144 | 6,811,882 | 28 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -0.01% | $15,000 | $30.00 | -500 | 6,922,026 | 27 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -1.91% | $4,068,968 | $30.17 | -134,868 | 6,922,526 | 26 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -2.41% | $5,249,705 | $30.12 | -174,293 | 7,057,394 | 25 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -0.02% | $36,301 | $30.10 | -1,206 | 7,231,687 | 19 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -0.45% | $988,469 | $30.02 | -32,927 | 7,232,893 | 18 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -0.13% | $275,557 | $30.04 | -9,173 | 7,265,820 | 17 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -1.84% | $4,120,836 | $30.25 | -136,226 | 7,274,993 | 14 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -1.8% | $4,088,702 | $30.15 | -135,612 | 7,411,219 | 13 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -1.26% | $2,895,710 | $30.06 | -96,331 | 7,546,831 | 12 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -0.27% | $609,336 | $29.76 | -20,475 | 7,643,162 | 07 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -1.41% | $3,258,013 | $29.79 | -109,366 | 7,663,637 | 06 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -1.7% | $4,042,840 | $30.11 | -134,269 | 7,773,003 | 05 Aug 2026 | Direct |
| Alexander Otto | CURB | Common Stock | Sale | -0.49% | $1,170,234 | $30.17 | -38,788 | 7,907,272 | 04 Aug 2026 | Direct |
| Conor Fennerty | CURB | Common Stock | Sale | -26.4% | $1,674,200 | $30.38 | -55,105 | 153,909 | 30 Jul 2026 | Direct |
| Conor Fennerty | CURB | Common Stock | Award | 30.9% | 49,326 | 209,014 | 25 Jun 2026 | Direct | ||
| John M. Cattonar | CURB | Common Stock | Award | 32.6% | 45,051 | 183,189 | 25 Jun 2026 | Direct | ||
| David R. Lukes | CURB | Common Stock | Gift | 42,000 | 42,000 | 11 May 2026 | By Child in the Sarah Lukes 2025 Irrevocable Trust U/A dtd 08/07/2025 | |||
| David R. Lukes | CURB | Common Stock | Gift | 42,000 | 42,000 | 11 May 2026 | By Child in the Jacqueline Lukes 2025 Irrevocable Trust U/A dtd 08/07/2025 | |||
| David R. Lukes | CURB | Common Stock | Gift | 42,000 | 42,000 | 11 May 2026 | By Child in the Katherine Kensett Lukes 2025 Irrevocable Trust U/A dtd 08/07/2025 | |||
| David R. Lukes | CURB | Common Stock | Gift | -100% | -126,000 | 0 | 11 May 2026 | By Spouse in The Elizabeth G Lukes 2025 Revocable Trust U/A dtd 08/07/2025 | ||
| Lesley H. Solomon | CURB | Common Stock | Tax liability | -1.64% | -408 | 24,398 | 08 Apr 2026 | Direct | ||
| David R. Lukes | CURB | Common Stock | Sale | -14.2% | $2,244,595 | $26.83 | -83,663 | 506,597 | 16 Mar 2026 | Direct |
| David R. Lukes | CURB | Common Stock | Sale | -6.31% | $1,065,233 | $26.80 | -39,749 | 590,260 | 13 Mar 2026 | Direct |
| David R. Lukes | CURB | Common Stock | Tax liability | -9.33% | -77,816 | 756,009 | 28 Feb 2026 | Direct | ||
| Conor Fennerty | CURB | Common Stock | Tax liability | -10.9% | -19,562 | 159,688 | 28 Feb 2026 | Direct | ||
| John M. Cattonar | CURB | Common Stock | Tax liability | -6.32% | -9,320 | 138,138 | 28 Feb 2026 | Direct | ||
| Christina M. Yarian | CURB | Common Stock | Tax liability | -0.6% | -154 | 25,462 | 22 Feb 2026 | Direct | ||
| Christina M. Yarian | CURB | Common Stock | Award | 9.41% | 2,204 | 25,616 | 22 Feb 2026 | Direct | ||
| Lesley H. Solomon | CURB | Common Stock | Tax liability | -2.52% | -640 | 24,806 | 22 Feb 2026 | Direct | ||
| Lesley H. Solomon | CURB | Common Stock | Award | 17.7% | 3,828 | 25,446 | 22 Feb 2026 | Direct | ||
| David R. Lukes | CURB | Common Stock | Tax liability | -1.36% | -11,537 | 833,825 | 22 Feb 2026 | Direct | ||
| Conor Fennerty | CURB | Common Stock | Tax liability | -2.4% | -4,402 | 179,250 | 22 Feb 2026 | Direct | ||
| Conor Fennerty | CURB | Common Stock | Award | 5.49% | 9,564 | 183,652 | 22 Feb 2026 | Direct | ||
| John M. Cattonar | CURB | Common Stock | Tax liability | -1.27% | -1,893 | 147,458 | 22 Feb 2026 | Direct | ||
| David R. Lukes | CURB | Common Stock | Gift | 126,000 | 126,000 | 02 Feb 2026 | By Spouse in The Elizabeth G Lukes 2025 Revocable Trust U/A dtd 08/07/2025 | |||
| David R. Lukes | CURB | Common Stock | Gift | -16.7% | -126,000 | 630,009 | 02 Feb 2026 | Direct | ||
| Conor Fennerty | CURB | Common Stock | Tax liability | -1.4% | -2,472 | 174,088 | 15 Sep 2025 | Direct | ||
| John M. Cattonar | CURB | Common Stock | Tax liability | -1.16% | -1,746 | 149,351 | 15 Sep 2025 | Direct |
* marks a reported price that did not pass the local price check.