CGEM's three largest insider shareholders as of August 29, 2026 are Capital Management Lp Lynx1 (TenPercentOwner, 8.96Mn shares), Capital Management Lp Lynx1 (TenPercentOwner, 8.80Mn shares), Capital Management Lp Lynx1 (TenPercentOwner, 8.56Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Capital Management Lp Lynx1 | TenPercentOwner | 0 | 26,325,449 | 26,325,449 | 70.1% | 30 Oct, 2025 |
| 2 | Oncology Impact Fund L.P. Ubs | TenPercentOwner | 7,648,268 | 0 | 7,648,268 | 20.4% | 20 Sep, 2021 |
| 3 | Vision Scs F2 | TenPercentOwner | 1,255,963 | 0 | 1,255,963 | 3.3% | 04 Aug, 2022 |
| 4 | Bioscience I 2017 Ltd F2 | TenPercentOwner | 537,392 | 0 | 537,392 | 1.4% | 23 Jun, 2022 |
| 5 | Nadim Ahmed | President And Ceo | 390,803 | 0 | 390,803 | 1.0% | 25 Feb, 2026 |
| 6 | Corrine Savill | Chief Business Officer | 240,990 | 0 | 240,990 | 0.6% | 21 Feb, 2025 |
| 7 | Thomas Ebeling | Director | 186,653 | 0 | 186,653 | 0.5% | 11 Jun, 2024 |
| 8 | Jennifer Michaelson | Chief Scientific Officer | 162,844 | 0 | 162,844 | 0.4% | 14 Aug, 2026 |
| 9 | Jeffrey Alan Jones | Chief Medical Officer | 159,968 | 0 | 159,968 | 0.4% | 25 Feb, 2026 |
| 10 | Jeffrey Trigilio | Chief Financial Officer | 133,919 | 0 | 133,919 | 0.4% | 23 Feb, 2024 |
| 11 | Jacquelyn L Sumer | Chief Legal Officer | 130,559 | 0 | 130,559 | 0.3% | 02 Jul, 2026 |
| 12 | Mary Kay Fenton | Chief Financial Officer | 127,921 | 0 | 127,921 | 0.3% | 02 Jul, 2026 |
| 13 | Patrick Baeuerle | Chief Scientific Officer | 76,000 | 0 | 76,000 | 0.2% | 21 Feb, 2023 |
| 14 | Leigh Zawel | Officer | 69,785 | 0 | 69,785 | 0.2% | 15 Feb, 2022 |
| 15 | Partners L P/Il Bvf | TenPercentOwner | 64,161 | 0 | 64,161 | 0.2% | 19 Jan, 2023 |
| 16 | Raymond T Keane | Chief Legal Officer | 24,124 | 0 | 24,124 | 0.1% | 15 Feb, 2022 |
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 |
|---|---|---|---|---|---|---|---|---|
| 13 Aug, 2026 | Jennifer Michaelson | Chief Scientific Officer | Acquired M | 30,000 | $4.30 | $129.00K | 192,844 | Direct |
| 13 Aug, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed S | 30,000 | $20.26 | $607.80K | 162,844 | Direct |
| 13 Aug, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed M | 30,000 | $0.00 | $0 | 82,987 | Direct |
| 06 Jul, 2026 | Jennifer Michaelson | Chief Scientific Officer | Acquired M | 4,000 | $4.30 | $17.20K | 170,844 | Direct |
| 06 Jul, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed S | 8,000 | $17.82 | $142.56K | 162,844 | Direct |
| 06 Jul, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed M | 4,000 | $0.00 | $0 | 112,987 | Direct |
| 30 Jun, 2026 | Mary Kay Fenton | Chief Financial Officer | Acquired A | 1,541 | $8.60 | $13.25K | 127,921 | Direct |
| 30 Jun, 2026 | Jacquelyn L Sumer | Chief Legal Officer | Acquired A | 2,470 | $8.60 | $21.24K | 130,559 | Direct |
| 16 Jun, 2026 | Anthony Rosenberg | Director | Acquired A | 25,319 | $0.00 | $0 | 25,319 | Direct |
| 16 Jun, 2026 | Stephen W Webster | Director | Acquired A | 25,319 | $0.00 | $0 | 25,319 | Direct |
| 16 Jun, 2026 | Andrew R Allen | Director | Acquired A | 21,781 | $0.00 | $0 | 21,781 | Direct |
| 16 Jun, 2026 | Mary Thistle | Director | Acquired A | 25,319 | $0.00 | $0 | 25,319 | Direct |
| 05 May, 2026 | Jennifer Michaelson | Chief Scientific Officer | Acquired M | 4,000 | $4.30 | $17.20K | 174,844 | Direct |
| 05 May, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed S | 7,800 | $14.60 | $113.88K | 167,044 | Direct |
| 05 May, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed S | 200 | $15.58 | $3.12K | 166,844 | Direct |
| 05 May, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed M | 4,000 | $0.00 | $0 | 116,987 | Direct |
| 05 Mar, 2026 | Jennifer Michaelson | Chief Scientific Officer | Acquired M | 4,000 | $4.30 | $17.20K | 178,844 | Direct |
| 05 Mar, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed S | 8,000 | $15.68 | $125.44K | 170,844 | Direct |
| 05 Mar, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed M | 4,000 | $0.00 | $0 | 120,987 | Direct |
| 25 Feb, 2026 | Jennifer Michaelson | Chief Scientific Officer | Disposed S | 1,780 | $14.14 | $25.17K | 174,844 | Direct |