| Caribou Biosciences, Inc.10% owner · 2 transactions | — | 8.54M†as of Jan 2018 | — | — | 1.60M |
| Haurwitz Rachel E.Director, 10% owner · 2 transactions | — | 5.77M†as of May 2016 | — | — | — |
| Caribou Biosciences, Inc. +1 co-filer10% owner · 2 transactions | — | 5.59Mas of May 2016 | — | — | — |
| Isaly Samuel D +3 co-filersDirector · 4 transactions | — | 5.02M†as of May 2016 | — | 250.0K | — |
| Novartis Ag +1 co-filer10% owner · 9 transactions | — | 4.35Mas of Jul 2018 | — | 277.8K | 1.52M |
| Gordon Carl LDirector · 4 transactions | — | 4.26M†as of May 2016 | — | 250.0K | — |
| Atlas Venture Associates IX, L.P. +1 co-filer10% owner · 2 transactions | — | 3.73M†as of Mar 2017 | — | — | 21.1K |
| Atlas Venture Associates IX, L.P. +2 co-filers10% owner · 8 transactions | — | 3.58Mas of Jul 2017 | — | — | 150.0K |
| Fullerton Management Pte Ltd +3 co-filers10% owner · 2 transactions | — | 1.28M†as of May 2016 | — | 300.0K | — |
| Leonard John MPresident and CEO, Director · 91 transactions | — | 1.21M† | 1.48M | — | 804.5K |
| Formela Jean FrancoisDirector · 52 transactions | — | 827.2K†as of Jun 2022 | 7.3K | — | 1.84M |
| Rivera Jose EEVP, General Counsel · 68 transactions | — | 693.8K†as of Apr 2021 | 321.6K | — | 165.8K |
| Leonard John M.President and CEO, Director · 11 transactions | — | 525.8K†as of Sep 2020 | 28.4K | — | 28.4K |
| Bermingham NessanPresident & CEO, Director · 7 transactions | — | 458.3Kas of Dec 2017 | 8.4K | — | 336.8K |
| Cohen Fred EDirector · 9 transactions | — | 216.7K | 66.7K | 150.0K | — |
| Dulac Edward J IIIEVP, Chief Financial Officer · 5 transactions | — | 161.0K | 174.8K | — | 13.8K |
| Basta JamesEVP, General Counsel · 13 transactions | — | 156.8K | 155.3K | — | 29.6K |
| Chase William JDirector · 6 transactions | — | 143.9K | 37.1K | 100.0K | — |
| Schultes Birgit CEVP, Chief Scientific Officer · 4 transactions | — | 137.7K | 76.8K | — | 8.5K |
| Lebwohl DavidEVP, Chief Medical Officer · 33 transactions | — | 131.2K | 152.0K | — | 41.9K |
| Clark ElianaEVP, Chief Technical Officer · 22 transactions | — | 93.9K | 116.8K | — | 32.8K |
| Baker Bros. Advisors LP +3 co-filersFormer 10% owner · 4 transactions | — | 85.9Kas of May 2016 | — | 200.0K | — |
| Sepp-Lorenzino LauraEVP, Chief Scientific Officer · 31 transactions | — | 77.4Kas of Jan 2025 | 201.4K | — | 144.6K |
| Dube Michael PVP, Chief Accounting Officer · 8 transactions | — | 69.5K | 49.1K | — | 10.7K |
| Goddard GlennEVP, Chief Financial Officer · 24 transactions | — | 69.2Kas of Mar 2024 | 115.7K | — | 61.3K |
| Hicks DerekEVP, Chief Business Officer · 6 transactions | — | 59.9Kas of Jan 2025 | 72.1K | — | 12.2K |
| Keresty GeorgiaDirector · 7 transactions | — | 41.1K | 41.1K | — | — |
| Bhanji MunaDirector · 11 transactions | — | 36.4K | 39.3K | — | 2.9K |
| Verwiel FrankDirector · 7 transactions | — | 35.1K | 36.7K | — | 1.5K |
| Goodman JesseDirector · 8 transactions | — | 33.6K | 36.7K | — | 3.1K |
| Goff BrianDirector · 3 transactions | — | 32.6K | 32.6K | — | — |
| Bell GraemeEVP, Chief Financial Officer · 3 transactions | — | 21.4Kas of Mar 2018 | 21.4K | — | — |
| Schiermeier AndrewEVP, Chief Operating Officer · 5 transactions | — | 16.7Kas of Jan 2021 | 6.3K | 7.5K | 1.4K |
| Dorsa CarolineDirector · 8 transactions | — | 12.7Kas of Jun 2022 | 20.2K | — | 7.5K |
| Crowley John FDirector · 11 transactions | — | 11.7Kas of Jun 2023 | 24.2K | — | 12.5K |
| Karsen Perry ADirector · 8 transactions | — | 5.0Kas of Dec 2020 | 93.8K | — | 88.8K |