According to recent filings covering the 90 days ending February 19, 2026, the three most significant insider holders at Sangamo Therapeutics are TenPercentOwner Inc. Biogen (17.65Mn shares), President And Ceo And Director Sandy Macrae (1.95Mn shares), Svp Chief Development Officer Nathalie Dubois-Stringfellow (693.13K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Inc. Biogen | 17,652,466 | 28 Sep, 2023 | |
| Sandy Macrae | President And Ceo And Director | 1,946,584 | 26 Jan, 2026 |
| Nathalie Dubois-Stringfellow | Svp Chief Development Officer | 693,128 | 26 Jan, 2026 |
| Scott B. Willoughby | Svp And Chief Legal Officer And Secy | 665,410 | 26 Jan, 2026 |
| Prathyusha Duraibabu | Principal Financial Officer | 660,042 | 26 Jan, 2026 |
| Nikunj Jain | Principal Accounting Officer | 242,996 | 26 Jan, 2026 |
| David Mark Mcclung | Evp And Chief Operating Officer | 212,471 | 28 Nov, 2023 |
| Amy Pooler | Vp And Head Of Research | 193,923 | 27 Aug, 2024 |
| Gregory D Davis | Head Of Research & Technology | 191,062 | 26 Jan, 2026 |
| Rolf Andrew Ramelmeier | Evp And Technical Operations | 171,467 | 30 May, 2023 |
| Jason D. Fontenot | Svp And Chief Scientific Officer | 136,270 | 28 Nov, 2023 |
| H Stewart Parker | 112,600 | 16 Jun, 2025 | |
| Karen L. Smith | 102,100 | 16 Jun, 2025 | |
| Kenneth J. Hillan | 99,600 | 16 Jun, 2025 | |
| Robert Carey | 99,600 | 16 Jun, 2025 | |
| James R Meyers | 99,600 | 16 Jun, 2025 | |
| John Markels | 96,384 | 16 Jun, 2025 | |
| Margaret A Horn | 82,650 | 16 Jun, 2025 | |
| Courtney Beers | 82,650 | 16 Jun, 2025 | |
| Robert J. Schott | Svp And Head Of Development | 75,537 | 01 Mar, 2022 |
| Joseph S Zakrzewski | 60,700 | 01 Mar, 2022 | |
| Saira Ramasastry | 35,700 | 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 |
|---|---|---|---|---|---|---|---|---|
| 22 Jan, 2026 | Sandy Macrae | Common Stock | D | 102,950 | $0.40 | 1,946,584 | D | F |
| 22 Jan, 2026 | Prathyusha Duraibabu | Common Stock | D | 36,676 | $0.40 | 660,042 | D | F |
| 22 Jan, 2026 | Scott B. Willoughby | Common Stock | D | 36,676 | $0.40 | 665,410 | D | F |
| 22 Jan, 2026 | Nathalie Dubois-Stringfellow | Common Stock | D | 36,676 | $0.40 | 693,128 | D | F |
| 22 Jan, 2026 | Gregory D Davis | Common Stock | D | 7,721 | $0.40 | 191,062 | D | F |
| 22 Jan, 2026 | Nikunj Jain | Common Stock | D | 7,721 | $0.40 | 242,996 | D | F |
| 24 Nov, 2025 | Sandy Macrae | Common Stock | D | 7,488 | $0.42 | 2,049,534 | D | F |
| 24 Nov, 2025 | Prathyusha Duraibabu | Common Stock | D | 2,544 | $0.42 | 696,718 | D | F |
| 24 Nov, 2025 | Scott B. Willoughby | Common Stock | D | 2,035 | $0.42 | 702,086 | D | F |
| 24 Nov, 2025 | Nathalie Dubois-Stringfellow | Common Stock | D | 2,544 | $0.42 | 719,804 | D | F |
| 24 Nov, 2025 | Gregory D Davis | Common Stock | D | 723 | $0.42 | 193,791 | D | F |
| 24 Nov, 2025 | Nikunj Jain | Common Stock | D | 578 | $0.42 | 245,717 | D | F |
| 22 Oct, 2025 | Sandy Macrae | Common Stock | D | 126,950 | $0.66 | 2,057,022 | D | F |
| 22 Oct, 2025 | Prathyusha Duraibabu | Common Stock | D | 45,225 | $0.66 | 699,262 | D | F |
| 22 Oct, 2025 | Scott B. Willoughby | Common Stock | D | 44,122 | $0.66 | 704,121 | D | F |
| 22 Oct, 2025 | Nathalie Dubois-Stringfellow | Common Stock | D | 43,741 | $0.66 | 722,348 | D | F |
| 22 Oct, 2025 | Gregory D Davis | Common Stock | D | 6,708 | $0.66 | 194,514 | D | F |
| 22 Oct, 2025 | Nikunj Jain | Common Stock | D | 6,708 | $0.66 | 246,295 | D | F |
| 24 Aug, 2025 | Sandy Macrae | Common Stock | D | 7,488 | $0.59 | 2,183,972 | D | F |
| 24 Aug, 2025 | Prathyusha Duraibabu | Common Stock | D | 1,792 | $0.59 | 744,487 | D | F |