Curbline Properties's three largest insider shareholders as of September 29, 2026 are Alexander Otto (Director, 6.55Mn shares), David R Lukes (President Ceo, 756.01K shares), John M Cattonar (Evp Chief Investment Officer, 180.72K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Alexander Otto | Director | 6,550,075 | 0 | 6,550,075 | 90.4% | 16 Sep, 2026 |
| 2 | John M Cattonar | Evp Chief Investment Officer | 180,717 | 0 | 180,717 | 2.5% | 15 Sep, 2026 |
| 3 | Conor Fennerty | Evp, Cfo Treasurer | 151,437 | 0 | 151,437 | 2.1% | 15 Sep, 2026 |
| 4 | David R Lukes | President Ceo | 0 | 126,000 | 126,000 | 1.7% | 13 May, 2026 |
| 5 | Terrance R Ahern | Director | 68,618 | 0 | 68,618 | 0.9% | 17 Oct, 2024 |
| 6 | Jane E. Deflorio | Director | 42,488 | 0 | 42,488 | 0.6% | 17 Oct, 2024 |
| 7 | Linda B. Abraham | Director | 36,096 | 0 | 36,096 | 0.5% | 17 Oct, 2024 |
| 8 | Christina M. Yarian | Svp Chief Accounting Officer | 25,462 | 0 | 25,462 | 0.4% | 24 Feb, 2026 |
| 9 | Lesley H Solomon | Evp General Counsel | 24,398 | 0 | 24,398 | 0.3% | 09 Apr, 2026 |
| 10 | Barry A Sholem | Director | 21,874 | 0 | 21,874 | 0.3% | 17 Oct, 2024 |
| 11 | Victor B Macfarlane | Director | 17,466 | 0 | 17,466 | 0.2% | 17 Oct, 2024 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 08 Sep, 2026 | Alexander Otto | Director | Disposed S | 221,812 | $29.68 | $6.58Mn | 6,586,370 | Direct |
| 09 Sep, 2026 | Alexander Otto | Director | Disposed S | 33,112 | $29.59 | $979.78K | 6,553,258 | Direct |
| 01 Sep, 2026 | Alexander Otto | Director | Disposed S | 100 | $30.02 | $3.00K | 6,808,182 | Direct |
| 27 Aug, 2026 | Alexander Otto | Director | Disposed S | 500 | $30.00 | $15.00K | 6,922,026 | Direct |
| 28 Aug, 2026 | Alexander Otto | Director | Disposed S | 110,144 | $30.11 | $3.32Mn | 6,811,882 | Direct |
| 31 Aug, 2026 | Alexander Otto | Director | Disposed S | 3,600 | $30.05 | $108.18K | 6,808,282 | Direct |
| 25 Aug, 2026 | Alexander Otto | Director | Disposed S | 174,293 | $30.12 | $5.25Mn | 7,057,394 | Direct |
| 26 Aug, 2026 | Alexander Otto | Director | Disposed S | 134,868 | $30.17 | $4.07Mn | 6,922,526 | Direct |
| 18 Aug, 2026 | Alexander Otto | Director | Disposed S | 32,927 | $30.02 | $988.47K | 7,232,893 | Direct |
| 19 Aug, 2026 | Alexander Otto | Director | Disposed S | 1,206 | $30.10 | $36.30K | 7,231,687 | Direct |
| 14 Aug, 2026 | Alexander Otto | Director | Disposed S | 136,226 | $30.25 | $4.12Mn | 7,274,993 | Direct |
| 17 Aug, 2026 | Alexander Otto | Director | Disposed S | 9,173 | $30.04 | $275.56K | 7,265,820 | Direct |
| 12 Aug, 2026 | Alexander Otto | Director | Disposed S | 96,331 | $30.06 | $2.90Mn | 7,546,831 | Direct |
| 13 Aug, 2026 | Alexander Otto | Director | Disposed S | 135,612 | $30.15 | $4.09Mn | 7,411,219 | Direct |
| 06 Aug, 2026 | Alexander Otto | Director | Disposed S | 109,366 | $29.79 | $3.26Mn | 7,663,637 | Direct |
| 07 Aug, 2026 | Alexander Otto | Director | Disposed S | 20,475 | $29.76 | $609.34K | 7,643,162 | Direct |
| 04 Aug, 2026 | Alexander Otto | Director | Disposed S | 38,788 | $30.17 | $1.17Mn | 7,907,272 | Direct |
| 05 Aug, 2026 | Alexander Otto | Director | Disposed S | 134,269 | $30.11 | $4.04Mn | 7,773,003 | Direct |
| 30 Jul, 2026 | Conor Fennerty | Evp, Cfo Treasurer | Disposed S | 55,105 | $30.38 | $1.67Mn | 153,909 | Direct |
| 25 Jun, 2026 | John M Cattonar | Evp Chief Investment Officer | Acquired A | 45,051 | $0.00 | $0 | 183,189 | Direct |