As of August 29, 2026, the three largest insider holders of ABEO are Vishwas Seshadri (Chief Executive Officer, 1.31Mn shares), Joseph Walter Vazzano (Chief Financial Officer, 509.04K shares), Joseph Walter Vazzano (Chief Financial Officer, 492.08K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Vishwas Seshadri | Chief Executive Officer | 1,306,111 | 0 | 1,306,111 | 29.7% | 09 Jul, 2026 |
| 2 | Joseph Walter Vazzano | Chief Financial Officer | 1,001,120 | 0 | 1,001,120 | 22.7% | 22 Jul, 2026 |
| 3 | Brendan M. O'Malley | Svp, Chief Legal Officer | 708,317 | 0 | 708,317 | 16.1% | 09 Jul, 2026 |
| 4 | Madhav Vasanthavada | Chief Commercial Officer | 290,623 | 0 | 290,623 | 6.6% | 09 Jul, 2026 |
| 5 | Michael Amoroso | Director | 217,784 | 0 | 217,784 | 4.9% | 27 Jan, 2026 |
| 6 | Faith L. Charles | Director | 176,407 | 0 | 176,407 | 4.0% | 27 Jan, 2026 |
| 7 | Donald A. Wuchterl | Director | 167,935 | 0 | 167,935 | 3.8% | 02 Feb, 2026 |
| 8 | Leila Alland | Director | 162,614 | 0 | 162,614 | 3.7% | 02 Jul, 2026 |
| 9 | Christine Berni Silverstein | Director | 119,562 | 0 | 119,562 | 2.7% | 15 Jun, 2026 |
| 10 | Bernhardt G Zeiher | Director | 84,458 | 0 | 84,458 | 1.9% | 27 Jan, 2026 |
| 11 | Mark Alvino | Director | 62,065 | 0 | 62,065 | 1.4% | 01 Sep, 2026 |
| 12 | Eric Crombez | Director | 37,313 | 0 | 37,313 | 0.8% | 15 May, 2026 |
| 13 | Keith A. Goldan | Director | 32,751 | 0 | 32,751 | 0.7% | 07 Apr, 2026 |
| 14 | Todd Wider | Director | 16,907 | 0 | 16,907 | 0.4% | 28 Sep, 2022 |
| 15 | Paul Elliot Mann | Director | 16,907 | 0 | 16,907 | 0.4% | 28 Sep, 2022 |
| 16 | Edward Carr | Chief Financial Officer | 3 | 0 | 3 | 0.0% | 08 Oct, 2021 |
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 |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | Mark Alvino | Director | Disposed S | 15,000 | $5.86 | $87.97K | 62,065 | Direct |
| 21 Jul, 2026 | Joseph Walter Vazzano | Chief Financial Officer | Disposed S | 1,478 | $6.53 | $9.65K | 492,079 | Direct |
| 09 Jul, 2026 | Brendan M. O'Malley | Svp, Chief Legal Officer | Disposed S | 12,050 | $6.96 | $83.91K | 427,953 | Direct |
| 09 Jul, 2026 | Joseph Walter Vazzano | Chief Financial Officer | Disposed S | 24,880 | $6.96 | $173.26K | 493,557 | Direct |
| 09 Jul, 2026 | Madhav Vasanthavada | Chief Commercial Officer | Disposed S | 12,606 | $6.96 | $87.78K | 290,623 | Direct |
| 09 Jul, 2026 | Vishwas Seshadri | Chief Executive Officer | Disposed S | 67,971 | $6.96 | $473.33K | 1,306,108 | Direct |
| 30 Jun, 2026 | Leila Alland | Director | Disposed S | 11,000 | $5.92 | $65.09K | 162,614 | Direct |
| 16 Jun, 2026 | Madhav Vasanthavada | Chief Commercial Officer | Disposed J | 222 | $5.67 | $1.26K | 303,229 | Direct |
| 15 Jun, 2026 | Christine Berni Silverstein | Director | Disposed S | 18,160 | $5.71 | $103.70K | 119,562 | Direct |
| 15 Jun, 2026 | Christine Berni Silverstein | Director | Disposed S | 18,160 | $5.71 | $103.70K | 119,562 | Direct |
| 08 Jun, 2026 | Brendan M. O'Malley | Svp, Chief Legal Officer | Disposed S | 4,826 | $5.43 | $26.20K | 446,308 | Direct |
| 08 Jun, 2026 | Madhav Vasanthavada | Chief Commercial Officer | Disposed S | 4,170 | $5.43 | $22.64K | 308,901 | Direct |
| 08 Jun, 2026 | Vishwas Seshadri | Chief Executive Officer | Disposed S | 24,428 | $5.43 | $132.63K | 1,405,995 | Direct |
| 08 Jun, 2026 | Joseph Walter Vazzano | Chief Financial Officer | Disposed S | 10,271 | $5.43 | $55.77K | 557,504 | Direct |
| 09 Jun, 2026 | Madhav Vasanthavada | Chief Commercial Officer | Disposed S | 5,450 | $5.30 | $28.91K | 303,451 | Direct |
| 09 Jun, 2026 | Joseph Walter Vazzano | Chief Financial Officer | Disposed S | 13,421 | $5.30 | $71.19K | 544,083 | Direct |
| 09 Jun, 2026 | Brendan M. O'Malley | Svp, Chief Legal Officer | Disposed S | 6,305 | $5.30 | $33.44K | 440,003 | Direct |
| 09 Jun, 2026 | Vishwas Seshadri | Chief Executive Officer | Disposed S | 31,916 | $5.30 | $169.29K | 1,374,079 | Direct |
| 09 Jun, 2026 | Joseph Walter Vazzano | Chief Financial Officer | Disposed S | 25,646 | $5.39 | $138.29K | 518,437 | Direct |
| 26 May, 2026 | Mark Alvino | Director | Disposed G | 500 | $0.00 | $0 | 77,065 | Direct |