SGMO's three largest insider shareholders as of April 22, 2026 are Inc. Biogen (TenPercentOwner, 17.65Mn shares), Sandy Macrae (President, Ceo And Director, 1.91Mn shares), Nathalie Dubois-Stringfellow (Svp Chief Development Officer, 678.71K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Inc. Biogen | - | 0 | 17,652,466 | 28 Sep, 2023 |
| Sandy Macrae | President, Ceo And Director | 1,907,656 | 0 | 26 Feb, 2026 |
| Nathalie Dubois-Stringfellow | Svp Chief Development Officer | 678,711 | 0 | 26 Feb, 2026 |
| Prathyusha Duraibabu | Principal Financial Officer | 660,042 | 0 | 26 Jan, 2026 |
| Scott B. Willoughby | Svp, Chief Legal Officer, Secy | 651,406 | 0 | 26 Feb, 2026 |
| Nikunj Jain | Principal Accounting Officer | 237,211 | 0 | 26 Feb, 2026 |
| David Mark Mcclung | Evp, Chief Operating Officer | 212,471 | 0 | 28 Nov, 2023 |
| Amy Pooler | Vp, Head Of Research | 193,923 | 0 | 27 Aug, 2024 |
| Gregory D Davis | Head Of Research Technology | 185,111 | 0 | 26 Feb, 2026 |
| Rolf Andrew Ramelmeier | Evp, Technical Operations | 171,467 | 0 | 30 May, 2023 |
| Jason D. Fontenot | Svp, Chief Scientific Officer | 136,270 | 0 | 28 Nov, 2023 |
| H Stewart Parker | - | 112,600 | 0 | 16 Jun, 2025 |
| Karen L. Smith | - | 102,100 | 0 | 16 Jun, 2025 |
| James R Meyers | - | 99,600 | 0 | 16 Jun, 2025 |
| Kenneth J. Hillan | - | 99,600 | 0 | 16 Jun, 2025 |
| Robert Carey | - | 99,600 | 0 | 16 Jun, 2025 |
| John Markels | - | 96,384 | 0 | 16 Jun, 2025 |
| Courtney Beers | - | 82,650 | 0 | 16 Jun, 2025 |
| Margaret A Horn | - | 82,650 | 0 | 16 Jun, 2025 |
| Robert J. Schott | Svp, Head Of Development | 75,537 | 0 | 01 Mar, 2022 |
| Joseph S Zakrzewski | - | 60,700 | 0 | 01 Mar, 2022 |
| Saira Ramasastry | - | 35,700 | 0 | 01 Mar, 2022 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Apr, 2026 | Gregory D Davis | Stock Option (Right to Buy) | A | 225,000 | $0.00 | 225,000 | D | A |
| 01 Apr, 2026 | Nathalie Dubois-Stringfellow | Stock Option (Right to Buy) | A | 800,000 | $0.00 | 800,000 | D | A |
| 01 Apr, 2026 | Nikunj Jain | Stock Option (Right to Buy) | A | 225,000 | $0.00 | 225,000 | D | A |
| 01 Apr, 2026 | Sandy Macrae | Stock Option (Right to Buy) | A | 2,500,000 | $0.00 | 2,500,000 | D | A |
| 01 Apr, 2026 | Scott B. Willoughby | Stock Option (Right to Buy) | A | 800,000 | $0.00 | 800,000 | D | A |
| 24 Feb, 2026 | Scott B. Willoughby | Common Stock | D | 1,650 | $0.47 | 663,760 | D | F |
| 24 Feb, 2026 | Sandy Macrae | Common Stock | D | 5,291 | $0.47 | 1,941,293 | D | F |
| 24 Feb, 2026 | Nathalie Dubois-Stringfellow | Common Stock | D | 2,063 | $0.47 | 691,065 | D | F |
| 24 Feb, 2026 | Gregory D Davis | Common Stock | D | 832 | $0.47 | 190,230 | D | F |
| 24 Feb, 2026 | Nikunj Jain | Common Stock | D | 666 | $0.47 | 242,330 | D | F |
| 25 Feb, 2026 | Sandy Macrae | Common Stock | D | 33,637 | $0.47 | 1,907,656 | D | F |
| 25 Feb, 2026 | Nikunj Jain | Common Stock | D | 5,119 | $0.47 | 237,211 | D | F |
| 25 Feb, 2026 | Gregory D Davis | Common Stock | D | 5,119 | $0.47 | 185,111 | D | F |
| 25 Feb, 2026 | Nathalie Dubois-Stringfellow | Common Stock | D | 12,354 | $0.47 | 678,711 | D | F |
| 25 Feb, 2026 | Scott B. Willoughby | Common Stock | D | 12,354 | $0.47 | 651,406 | D | F |
| 22 Jan, 2026 | Sandy Macrae | Common Stock | D | 102,950 | $0.40 | 1,946,584 | D | F |
| 22 Jan, 2026 | Gregory D Davis | Common Stock | D | 7,721 | $0.40 | 191,062 | D | F |
| 22 Jan, 2026 | Nathalie Dubois-Stringfellow | Common Stock | D | 36,676 | $0.40 | 693,128 | D | F |
| 22 Jan, 2026 | Scott B. Willoughby | Common Stock | D | 36,676 | $0.40 | 665,410 | D | F |
| 22 Jan, 2026 | Prathyusha Duraibabu | Common Stock | D | 36,676 | $0.40 | 660,042 | D | F |