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CURBCurbline Properties Corp. · Insider ownership research

Curbline Properties Corp. insiders sold $46.9M in the past 12 months. How much of their stake is that?

Insiders sold $46.9M in the past 12 months.0% was sold under disclosed trading plans, 100% with no plan disclosed. The largest seller, Alexander Otto (Director), sold $41.9M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why

Updated Oct 13, 2026 from SEC filings · covers Oct 14, 2025 to Oct 13, 2026
$46.9M
sold with no plan disclosed, past 12 months
0%
of sales were under disclosed trading plans, past 12 months
3 of 6
officers and directors sold shares, past 12 months
Latest filing: Filed Sep 16 for a sale on Sep 14. Alexander Otto sold 839 shares ($25K) with no plan disclosed. Filing
SEC ownership filings: 27 filed in the 12 months to Oct 13, 2026; 65 on record since Sep 23, 2024 · See the evidence

What stands out

Three insiders sold $46.9M with no disclosed plan: Alexander Otto ($41.9M), David Lukes ($3.3M) and Conor Fennerty ($1.7M). The filings don't state a reason.Alexander Otto: largest such sale, Sep 8, 2026 · David Lukes: largest such sale, Mar 16, 2026 · Conor Fennerty: largest such sale, Jul 30, 2026
Selling picked up in the last 90 days: officers and directors sold 1.45M shares, against an average of 40K per 90 days earlier in the period. Most of it was Alexander Otto (1.40M shares in the last 90 days) and Conor Fennerty (55K shares in the last 90 days); 0% of these sales were under disclosed plans.Alexander Otto: largest recent sale, Sep 8, 2026 · Conor Fennerty: largest recent sale, Jul 30, 2026

A share of stake is shown for 0 of the 3 officers and directors who sold. 6 are left out

i
Left out: Alexander Otto, David Lukes, Conor Fennerty, John Cattonar, Christina Yarian and Lesley Solomon (share of stake is being verified).
Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.

Alexander Otto
Director
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$41.9MNo plan disclosed
David Lukes
President & CEO, Director
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$3.3MNo plan disclosed
Conor Fennerty
EVP, CFO & Treasurer
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$1.7MNo plan disclosed
Amounts, filings and trading plans for each seller

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

No plan disclosedOne dollar scale for every month; the tallest bar is labeled
OctNovDecJanFebMar 2026: $3.3M no plan disclosedMarAprMayJunJul 2026: $1.7M no plan disclosedJulAug 2026: $34.2M no plan disclosed$34.2MAugSep 2026: $7.7M no plan disclosedSepOct

Recent activity

Past 30 days, Sep 14, 2026 to Oct 13, 2026
Sep 15, 20262 executives had 4.9K shares ($144K) withheld by the company for taxes (not a market sale).
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Conor Fennerty
EVP, CFO & Treasurer
2,472$29.08n/an/aSep 15, 2026Sep 15, 2026
John Cattonar
EVP & Chief Investment Officer
2,472$29.08n/an/aSep 15, 2026Sep 15, 2026
Sep 14, 2026Alexander Otto sold 839 shares ($25K) with no plan disclosed.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Alexander Otto
Director
839$29.52n/an/aSep 14, 2026Sep 16, 2026

"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Common questions

Is the Curbline Properties Corp. CEO selling stock?

Yes. David Lukes sold 123K shares ($3.3M) in the past 12 months, none of it under a trading plan disclosed in the filings.

Why are Curbline Properties Corp. insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 0% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 100% had no disclosed plan. A trading plan schedules sales in advance.

Are any Curbline Properties Corp. insiders buying?

No. Officers and directors reported no purchases in the past 12 months.

The evidence

Who sold3 officers and directors: amount, % of holdings, trading plan
Who soldAmount% of holdingsTrading plan
Alexander Otto
Director
$41.9M
1.40M shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
David Lukes
President & CEO, Director
$3.3M
123K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Conor Fennerty
EVP, CFO & Treasurer
$1.7M
55K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
The full ownership picture0 of 6 officers and directors confirmed

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

InsiderHeld Oct 13, 2025SoldHeld Oct 13, 2026Still held
Alexander Otto
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Alexander Otto are complete.
Director
n/a−1.40Mn/an/a
Vesting, gifts, unvested awards and holding lines for Alexander Otto

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Alexander Otto are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
David Lukes
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for David Lukes are complete.
President & CEO, Director
n/a−123Kn/an/a
Vesting, gifts, unvested awards and holding lines for David Lukes

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for David Lukes are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−89Kwithheld by the company for taxes
Conor Fennerty
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Conor Fennerty are complete.
EVP, CFO & Treasurer
n/a−55Kn/an/a
Vesting, gifts, unvested awards and holding lines for Conor Fennerty

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Conor Fennerty are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−26Kwithheld by the company for taxes
John Cattonar
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for John Cattonar are complete.
EVP & Chief Investment Officer
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for John Cattonar

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for John Cattonar are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−14Kwithheld by the company for taxes
Christina Yarian
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Christina Yarian are complete.
SVP & Chief Accounting Officer
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Christina Yarian

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Christina Yarian are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−154withheld by the company for taxes
Lesley Solomon
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Lesley Solomon are complete.
EVP & General Counsel
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Lesley Solomon

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Lesley Solomon are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−1Kwithheld by the company for taxes

Holdings and share of stake for Curbline Properties Corp. are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.

What explains the selling$46.9M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $46.9M across 1,574,502 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

No plan disclosed · $46.9M

Sales with no 10b5-1 plan and no tax reference in the filing. $41.9M of it is Alexander Otto. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Alexander Otto, Sep 8, 2026

Taxes

130,676 shares ($3.6M) were withheld by the company for taxes, which isn't a market sale.

SellerShares soldProceedsUnder a disclosed planShare of totalSales dates
Alexander Otto
Director
1.40M$41.9M0%89%Aug 4, 2026 to Sep 14, 2026
David Lukes
President & CEO, Director
123K$3.3M0%7%Mar 13, 2026 to Mar 16, 2026
Conor Fennerty
EVP, CFO & Treasurer
55K$1.7M0%4%Jul 30, 2026 to Jul 30, 2026

Sales by month

MonthSale proceedsDisclosed planTo cover taxesNo plan disclosed
Oct 2025$0$0$0$0
Nov 2025$0$0$0$0
Dec 2025$0$0$0$0
Jan 2026$0$0$0$0
Feb 2026$0$0$0$0
Mar 2026$3.3M$0$0$3.3M
Apr 2026$0$0$0$0
May 2026$0$0$0$0
Jun 2026$0$0$0$0
Jul 2026$1.7M$0$0$1.7M
Aug 2026$34.2M$0$0$34.2M
Sep 2026$7.7M$0$0$7.7M
Oct 2026$0$0$0$0
Known gaps and uncertainty6 officers and directors not confirmed

Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Curbline Properties Corp. are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology65 filings on record, 27 filed in the 12-month period, and how we read them

All 65 Forms 3, 4 and 5 on record for Curbline Properties Corp. (SEC CIK 2027317), filed from Sep 23, 2024 to Sep 16, 2026; 27 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 13, 2026. Prices are the ones reported in each filing, often weighted averages.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (6)No filing in 18 months; last reported balances, not in any total
NameLast filedLast reported balance
Jane DeFlorioOct 17, 202442,488 shares, last reported balance as of Oct 15, 2024
Linda AbrahamOct 17, 202436,096 shares, last reported balance as of Oct 15, 2024
Terrance AhernOct 17, 202468,618 shares, last reported balance as of Oct 15, 2024
Victor MacfarlaneOct 17, 202417,466 shares, last reported balance as of Oct 15, 2024
Barry SholemOct 17, 2024110,024 shares, last reported balance as of Oct 15, 2024
SITE Centers Corp.Oct 3, 2024No balance on record

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