As of July 26, 2026, the three largest insider holders of SGMT are Enterprise Associates 13 Lp New (TenPercentOwner, 3.85Mn shares), Patrick J Kerins (TenPercentOwner, 3.01Mn shares), Forest Baskett (TenPercentOwner, 3.01Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Beth C Seidenberg | - | 84,768 | 1,946,350 | 20 Jul, 2023 |
| Patrick J Kerins | - | 13,139 | 3,000,275 | 31 Jan, 2024 |
| Scott D Sandell | - | 0 | 3,007,272 | 31 Jan, 2024 |
| Forest Baskett | - | 0 | 3,011,575 | 31 Jan, 2024 |
| Enterprise Associates 13 Lp New | - | 3,850,275 | 0 | 20 Jul, 2023 |
| Partners 13, Limited Partnership Nea | - | 0 | 3,000,275 | 31 Jan, 2024 |
| David Happel | President Ceo | 805,621 | 0 | 20 Feb, 2026 |
| Eduardo Bruno Martins | Chief Medical Officer | 147,296 | 0 | 20 Feb, 2026 |
| Merdad Parsey | - | 12,794 | 0 | 20 Jul, 2023 |
| Jinzi Jason Wu | - | 0 | 1,654,701 | 20 Jul, 2023 |
| George Kemble | Executive Chairman | 81,005 | 0 | 21 Nov, 2025 |
| Thierry Chauche | Chief Financial Officer | 59,688 | 0 | 20 Feb, 2026 |
| Elizabeth Rozek | Chief Legal Admin. Officer | 234,959 | 0 | 20 Feb, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 19 Feb, 2026 | Thierry Chauche | Series A Common Stock | A | 44,000 | $0.00 | 59,688 | D | A |
| 19 Feb, 2026 | Eduardo Bruno Martins | Series A Common Stock | A | 44,000 | $0.00 | 147,296 | D | A |
| 19 Feb, 2026 | Elizabeth Rozek | Series A Common Stock | A | 44,000 | $0.00 | 234,959 | D | A |
| 19 Feb, 2026 | David Happel | Series A Common Stock | A | 128,000 | $0.00 | 805,621 | D | A |
| 19 Feb, 2026 | Eduardo Bruno Martins | Stock Option (Right to Buy) | A | 88,000 | $0.00 | 88,000 | D | A |
| 19 Feb, 2026 | David Happel | Stock Option (Right to Buy) | A | 256,000 | $0.00 | 256,000 | D | A |
| 19 Feb, 2026 | Elizabeth Rozek | Stock Option (Right to Buy) | A | 88,000 | $0.00 | 88,000 | D | A |
| 19 Feb, 2026 | Thierry Chauche | Stock Option (Right to Buy) | A | 88,000 | $0.00 | 88,000 | D | A |
| 10 Feb, 2026 | Elizabeth Rozek | Series A Common Stock | D | 2,622 | $5.36 | 190,959 | D | S |
| 10 Feb, 2026 | Thierry Chauche | Series A Common Stock | D | 1,312 | $5.36 | 15,688 | D | S |
| 10 Feb, 2026 | Eduardo Bruno Martins | Series A Common Stock | D | 3,640 | $5.36 | 103,296 | D | S |
| 10 Feb, 2026 | David Happel | Series A Common Stock | D | 12,101 | $5.36 | 677,621 | D | S |
| 20 Nov, 2025 | George Kemble | Series A Common Stock | D | 37,688 | $7.69 | 81,005 | D | S |
| 04 Nov, 2025 | Elizabeth Rozek | Series A Common Stock | A | 9,855 | $0.00 | 193,581 | D | A |
| 04 Nov, 2025 | Elizabeth Rozek | Stock Option (Right to Buy) | A | 13,367 | $0.00 | 13,367 | D | A |
| 21 Jul, 2025 | Elizabeth Rozek | Series A Common Stock | D | 10,780 | $9.13 | 183,726 | D | S |
| 21 Jul, 2025 | Eduardo Bruno Martins | Series A Common Stock | D | 8,277 | $9.13 | 106,936 | D | S |
| 21 Jul, 2025 | David Happel | Series A Common Stock | D | 65,478 | $9.13 | 689,722 | D | S |
| 09 Jun, 2025 | Anne M. Phillips | Stock Option (Right to Buy) | A | 27,268 | $0.00 | 27,268 | D | A |
| 09 Jun, 2025 | George Kemble | Stock Option (Right to Buy) | A | 32,250 | $0.00 | 32,250 | D | A |