As of September 09, 2026, the three largest insider holders of BCAB are Jay M Phd Short (Chief Executive Officer, 2.66Mn shares), Jay M Phd Short (Chief Executive Officer, 793.55K shares), Richard A Waldron (Former Chief Financial Officer, 343.42K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Richard A Waldron | Former Chief Financial Officer | 343,421 | 0 | 343,421 | 62.9% | 02 Mar, 2026 |
| 2 | Eddie Williams | Director | 60,200 | 0 | 60,200 | 11.0% | 18 Jun, 2025 |
| 3 | Sylvia Mcbrinn | Director | 59,125 | 0 | 59,125 | 10.8% | 18 Jun, 2025 |
| 4 | Jay M Phd Short | Chief Executive Officer | 52,035 | 0 | 52,035 | 9.5% | 02 Sep, 2026 |
| 5 | Eric Sievers | Chief Medical Officer | 11,346 | 0 | 11,346 | 2.1% | 02 Sep, 2026 |
| 6 | Christian Vasquez | Chief Financial Officer | 10,476 | 0 | 10,476 | 1.9% | 02 Sep, 2026 |
| 7 | Scott Andrew Smith | Former President | 6,431 | 0 | 6,431 | 1.2% | 18 Jun, 2025 |
| 8 | Lawrence Steinman | Director | 1,569 | 0 | 1,569 | 0.3% | 18 Jun, 2025 |
| 9 | Susan Moran | Director | 1,046 | 0 | 1,046 | 0.2% | 18 Jun, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 11 Mar, 2026 | Jay M Phd Short | Chief Executive Officer | Acquired A | 430,000 | $0.00 | $0 | 53,192 | Direct |
| 10 Mar, 2026 | Eric Sievers | Chief Medical Officer | Acquired A | 240,000 | $0.00 | $0 | 598,705 | Direct |
| 11 Mar, 2026 | Jay M Phd Short | Chief Executive Officer | Acquired A | 430,000 | $0.00 | $0 | 2,659,603 | Direct |
| 10 Mar, 2026 | Eric Sievers | Chief Medical Officer | Acquired A | 240,000 | $0.00 | $0 | 11,974 | Direct |
| 10 Mar, 2026 | Christian Vasquez | Chief Financial Officer | Acquired A | 240,000 | $0.00 | $0 | 10,604 | Direct |
| 10 Mar, 2026 | Eric Sievers | Chief Medical Officer | Acquired A | 240,000 | $0.00 | $0 | 598,705 | Direct |
| 11 Mar, 2026 | Jay M Phd Short | Chief Executive Officer | Acquired A | 430,000 | $0.00 | $0 | 2,659,603 | Direct |
| 10 Mar, 2026 | Eric Sievers | Chief Medical Officer | Acquired A | 240,000 | $0.00 | $0 | 598,705 | Direct |
| 11 Mar, 2026 | Jay M Phd Short | Chief Executive Officer | Acquired A | 430,000 | $0.00 | $0 | 2,659,603 | Direct |
| 28 Feb, 2026 | Richard A Waldron | Former Chief Financial Officer | Disposed F | 2,729 | $0.25 | $674 | 343,421 | Direct |
| 28 Feb, 2026 | Eric Sievers | Chief Medical Officer | Disposed F | 3,140 | $0.25 | $776 | 358,705 | Direct |
| 28 Feb, 2026 | Eric Sievers | Chief Medical Officer | Disposed F | 3,140 | $12.35 | $38.78K | 7,174 | Direct |
| 28 Feb, 2026 | Eric Sievers | Chief Medical Officer | Disposed F | 3,140 | $0.25 | $776 | 358,705 | Direct |
| 28 Feb, 2026 | Richard A Waldron | Former Chief Financial Officer | Disposed F | 2,729 | $0.25 | $674 | 343,421 | Direct |
| 28 Feb, 2026 | Jay M Phd Short | Chief Executive Officer | Disposed F | 7,728 | $0.25 | $1.91K | 2,229,603 | Direct |
| 28 Feb, 2026 | Jay M Phd Short | Chief Executive Officer | Disposed F | 7,728 | $0.25 | $1.91K | 2,229,603 | Direct |
| 28 Feb, 2026 | Eric Sievers | Chief Medical Officer | Disposed F | 3,140 | $0.25 | $776 | 358,705 | Direct |
| 28 Feb, 2026 | Richard A Waldron | Former Chief Financial Officer | Disposed F | 2,729 | $0.25 | $674 | 343,421 | Direct |
| 28 Feb, 2026 | Jay M Phd Short | Chief Executive Officer | Disposed F | 7,728 | $0.25 | $1.91K | 2,229,603 | Direct |
| 28 Feb, 2026 | Christian Vasquez | Chief Financial Officer | Disposed F | 1,802 | $12.35 | $22.25K | 5,804 | Direct |