ALEC's three largest insider shareholders as of April 17, 2026 are Terrance Mcguire (Director, 10.85Mn shares), Venture Management Co. Vi, L.L.C. Polaris (TenPercentOwner, 9.85Mn shares), Tillman U. Gerngross (Director, 2.64Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Terrance Mcguire | - | 0 | 10,853,817 | 13 Sep, 2023 |
| Venture Management Co. Vi, L.L.C. Polaris | - | 0 | 9,853,817 | 31 May, 2024 |
| Tillman U. Gerngross | - | 2,644,319 | 0 | 15 Jun, 2023 |
| Arnon Rosenthal | Chief Executive Officer | 2,454,422 | 0 | 13 Mar, 2026 |
| Arnon Rosenthal | Chief Executive Officer | 0 | 1,972,875 | 12 Nov, 2021 |
| Robert King | Chief Development Officer | 550,871 | 0 | 04 Oct, 2022 |
| Sara Kenkare-Mitra | President And Head Of Rd | 501,652 | 0 | 03 Dec, 2025 |
| Neil Lindsay Berkley | Cfo Chief Business Officer | 399,260 | 0 | 13 Mar, 2026 |
| Gary Romano | Chief Medical Officer | 332,977 | 0 | 05 Mar, 2025 |
| Robert Paul | Chief Medical Officer | 234,319 | 0 | 11 Aug, 2021 |
| Grace Wong-Sarad | Principal Accounting Officer | 106,465 | 0 | 12 Mar, 2026 |
| Kristine Yaffe | - | 95,409 | 0 | 23 Jun, 2025 |
| Calvin Yu | Vice President, Finance | 76,686 | 0 | 07 Jul, 2021 |
| Paula Hammond | - | 74,909 | 0 | 27 Aug, 2025 |
| Mark Altmeyer | - | 69,950 | 0 | 12 Jun, 2025 |
| Terrance Mcguire | - | 54,996 | 0 | 24 Aug, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 15 Mar, 2026 | Neil Lindsay Berkley | Common Stock | A | 54,600 | $0.00 | 399,260 | D | A |
| 13 Mar, 2026 | Arnon Rosenthal | Common Stock | A | 116,246 | $0.00 | 2,454,422 | D | A |
| 10 Mar, 2026 | Grace Wong-Sarad | Common Stock | D | 1,000 | $2.65 | 106,465 | D | S |
| 03 Mar, 2026 | Grace Wong-Sarad | Common Stock | D | 3,367 | $2.08 | 107,465 | D | S |
| 02 Mar, 2026 | Grace Wong-Sarad | Common Stock | D | 8,071 | $2.12 | 110,832 | D | S |
| 02 Mar, 2026 | Neil Lindsay Berkley | Common Stock | D | 29,649 | $2.12 | 344,660 | D | S |
| 02 Mar, 2026 | Arnon Rosenthal | Common Stock | D | 81,864 | $2.12 | 2,338,176 | D | S |
| 26 Feb, 2026 | Grace Wong-Sarad | Common Stock | D | 4,079 | $2.50 | 118,903 | D | S |
| 05 Dec, 2025 | Grace Wong-Sarad | Common Stock | D | 4,753 | $1.21 | 122,982 | D | S |
| 03 Dec, 2025 | Arnon Rosenthal | Common Stock | D | 104,347 | $1.12 | 2,420,040 | D | S |
| 03 Dec, 2025 | Grace Wong-Sarad | Common Stock | D | 8,056 | $1.12 | 127,735 | D | S |
| 03 Dec, 2025 | Neil Lindsay Berkley | Common Stock | D | 37,261 | $1.12 | 374,309 | D | S |
| 03 Dec, 2025 | Sara Kenkare-Mitra | Common Stock | D | 41,687 | $1.12 | 501,652 | D | S |
| 10 Nov, 2025 | Grace Wong-Sarad | Common Stock | A | 32,343 | $0.00 | 135,791 | D | A |
| 10 Nov, 2025 | Arnon Rosenthal | Common Stock | A | 174,167 | $0.00 | 2,524,387 | D | A |
| 10 Nov, 2025 | Neil Lindsay Berkley | Common Stock | A | 65,000 | $0.00 | 411,570 | D | A |
| 10 Nov, 2025 | Grace Wong-Sarad | Employee Stock Option (right to buy) | A | 48,535 | $0.00 | 48,535 | D | A |
| 10 Nov, 2025 | Neil Lindsay Berkley | Employee Stock Option (right to buy) | A | 195,000 | $0.00 | 195,000 | D | A |
| 10 Nov, 2025 | Arnon Rosenthal | Employee Stock Option (right to buy) | A | 522,500 | $0.00 | 522,500 | D | A |
| 02 Sep, 2025 | Arnon Rosenthal | Common Stock | D | 51,562 | $2.50 | 2,350,220 | D | S |