As of August 29, 2026, the three largest insider holders of ABCL are Holdings Ltd. Thermopylae (TenPercentOwner, 56.13Mn shares), Holdings Ltd. Thermopylae (TenPercentOwner, 56.13Mn shares), Veronique Lecault (Chief Operating Officer, 2.12Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Holdings Ltd. Thermopylae | TenPercentOwner | 56,134,097 | 0 | 56,134,097 | 90.0% | 02 Mar, 2026 |
| 2 | Veronique Lecault | Chief Operating Officer | 2,123,456 | 0 | 2,123,456 | 3.4% | 24 Jun, 2024 |
| 3 | Michael R Hayden | Director | 0 | 1,373,397 | 1,373,397 | 2.2% | 24 Aug, 2026 |
| 4 | Carl L. G. Hansen | Chief Executive Officer | 898,000 | 0 | 898,000 | 1.4% | 26 Nov, 2024 |
| 5 | Ester Falconer | Chief Technology Officer | 875,000 | 0 | 875,000 | 1.4% | 03 Sep, 2021 |
| 6 | Andrew Booth | Chief Financial Officer | 621,300 | 0 | 621,300 | 1.0% | 14 Aug, 2026 |
| 7 | John S. Montalbano | Director | 251,000 | 0 | 251,000 | 0.4% | 18 Aug, 2026 |
| 8 | John Hamer | Director | 128,862 | 0 | 128,862 | 0.2% | 02 Sep, 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 |
|---|---|---|---|---|---|---|---|---|
| 24 Aug, 2026 | Michael R Hayden | Director | Acquired P | 53,613 | $10.64 | $570.44K | 1,373,397 | Indirect |
| 18 Aug, 2026 | John S. Montalbano | Director | Acquired P | 10,000 | $11.03 | $110.30K | 251,000 | Direct |
| 14 Aug, 2026 | Andrew Booth | Chief Financial Officer | Acquired P | 37,200 | $10.32 | $383.90K | 482,800 | Direct |
| 01 Jul, 2026 | Victor Sandor | Director | Acquired A | 152,207 | $0.00 | $0 | 152,207 | Direct |
| 01 Jul, 2026 | Lynn Seely | Director | Acquired A | 152,207 | $0.00 | $0 | 152,207 | Direct |
| 11 Jun, 2026 | Michael R Hayden | Director | Acquired A | 111,701 | $0.00 | $0 | 1,011,544 | Direct |
| 11 Jun, 2026 | Stephen Quake | Director | Acquired A | 111,701 | $0.00 | $0 | 306,633 | Direct |
| 11 Jun, 2026 | John S. Montalbano | Director | Acquired A | 111,701 | $0.00 | $0 | 1,141,544 | Direct |
| 03 Jun, 2026 | Andrew Booth | Chief Financial Officer | Acquired M | 250,000 | $0.19 | $47.50K | 445,600 | Direct |
| 03 Jun, 2026 | Andrew Booth | Chief Financial Officer | Disposed M | 250,000 | $0.00 | $0 | 8,501,849 | Direct |
| 14 May, 2026 | John S. Montalbano | Director | Acquired P | 20,000 | $4.77 | $95.40K | 241,000 | Direct |
| 27 Feb, 2026 | Holdings Ltd. Thermopylae | TenPercentOwner | Acquired P | 38,000 | $3.44 | $130.72K | 56,134,097 | Direct |
| 27 Feb, 2026 | Holdings Ltd. Thermopylae | TenPercentOwner | Acquired P | 38,000 | $3.44 | $130.72K | 56,134,097 | Direct |
| 27 Feb, 2026 | Holdings Ltd. Thermopylae | TenPercentOwner | Acquired P | 38,000 | $3.44 | $130.72K | 56,134,097 | Direct |
| 27 Feb, 2026 | Holdings Ltd. Thermopylae | TenPercentOwner | Acquired P | 38,000 | $3.44 | $130.72K | 56,134,097 | Direct |
| 27 Feb, 2026 | Andrew Booth | Chief Financial Officer | Acquired P | 42,600 | $3.42 | $145.69K | 195,600 | Direct |
| 27 Feb, 2026 | Andrew Booth | Chief Financial Officer | Acquired P | 42,600 | $3.42 | $145.69K | 195,600 | Direct |
| 26 Feb, 2026 | Holdings Ltd. Thermopylae | TenPercentOwner | Acquired P | 177,457 | $3.27 | $580.28K | 56,096,097 | Direct |
| 26 Feb, 2026 | Holdings Ltd. Thermopylae | TenPercentOwner | Acquired P | 177,457 | $3.27 | $580.28K | 56,096,097 | Direct |
| 26 Feb, 2026 | Holdings Ltd. Thermopylae | TenPercentOwner | Acquired P | 177,457 | $3.27 | $580.28K | 56,096,097 | Direct |