TScan Therapeutics's top three insider shareholders as of September 29, 2026 are Capital Management Lp Lynx1 (TenPercentOwner, 8.02Mn shares), Capital Management Lp Lynx1 (TenPercentOwner, 7.94Mn shares), Capital Management Lp Lynx1 (TenPercentOwner, 5.24Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Capital Management Lp Lynx1 | TenPercentOwner | 0 | 26,422,111 | 26,422,111 | 90.3% | 23 Dec, 2025 |
| 2 | Bros. Advisors Lp Baker | Director, TenPercentOwner | 0 | 2,528,583 | 2,528,583 | 8.6% | 12 May, 2022 |
| 3 | David P Southwell | Chief Executive Officer | 171,569 | 0 | 171,569 | 0.6% | 20 May, 2022 |
| 4 | Timothy J Barberich | Director | 67,027 | 0 | 67,027 | 0.2% | 21 Dec, 2023 |
| 5 | Barbara Klencke | Director | 45,000 | 0 | 45,000 | 0.2% | 24 Sep, 2024 |
| 6 | Brian M. Silver | Chief Financial Officer | 32,885 | 0 | 32,885 | 0.1% | 29 Dec, 2022 |
| 7 | Zoran Zdraveski | Chief Legal Officer | 4,716 | 0 | 4,716 | 0.0% | 27 Aug, 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 |
|---|---|---|---|---|---|---|---|---|
| 20 May, 2026 | Gabriela Gruia | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |
| 20 May, 2026 | Bros. Advisors Lp Baker | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Indirect |
| 20 May, 2026 | Katina Dorton | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |
| 20 May, 2026 | Barbara Klencke | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |
| 20 May, 2026 | Keith Woods | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |
| 20 May, 2026 | Garry A Nicholson | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |
| 20 May, 2026 | Bros. Advisors Lp Baker | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Indirect |
| 20 Jan, 2026 | Jason Amello | Chief Financial Officer | Acquired A | 350,000 | $0.00 | $0 | 350,000 | Direct |
| 20 Jan, 2026 | Chrystal Louis | Chief Medical Officer | Acquired A | 420,000 | $0.00 | $0 | 420,000 | Direct |
| 20 Jan, 2026 | Leiden Dworak | Officer | Acquired A | 100,000 | $0.00 | $0 | 100,000 | Direct |
| 20 Jan, 2026 | Zoran Zdraveski | Officer | Acquired A | 350,000 | $0.00 | $0 | 350,000 | Direct |
| 20 Jan, 2026 | Gavin Macbeath | Chief Executive Officer | Acquired A | 1,165,000 | $0.00 | $0 | 1,165,000 | Direct |
| 19 Dec, 2025 | Capital Management Lp Lynx1 | TenPercentOwner | Acquired P | 80,069 | $0.90 | $71.97K | 7,937,416 | Indirect |
| 22 Dec, 2025 | Capital Management Lp Lynx1 | TenPercentOwner | Acquired P | 75,500 | $0.90 | $67.95K | 8,012,916 | Indirect |
| 23 Dec, 2025 | Capital Management Lp Lynx1 | TenPercentOwner | Acquired P | 6,232 | $0.90 | $5.60K | 8,019,148 | Indirect |
| 30 Jun, 2025 | Barbara Klencke | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |
| 30 Jun, 2025 | Garry A Nicholson | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |
| 30 Jun, 2025 | Katina Dorton | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |
| 30 Jun, 2025 | Bros. Advisors Lp Baker | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Indirect |
| 30 Jun, 2025 | Keith Woods | Director | Acquired A | 67,000 | $0.00 | $0 | 67,000 | Direct |