Atara Biotherapeutics's top three insider shareholders as of June 06, 2026 are Capital Fund I Lp Adiumentum (Director, 1.21Mn shares), Innovation Ltd Panacea (TenPercentOwner, 307.89K shares), Charlene A. Banard (Evp, Chief Technical Officer, 276.01K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Carol Giltner Gallagher | - | 33,012 | 0 | 12 Jun, 2025 |
| Ronald C Jr Renaud | - | 31,500 | 0 | 27 Jun, 2022 |
| Matthew K Fust | - | 18,188 | 0 | 12 Jun, 2025 |
| Joe Newell | Chief Operations Officer | 113,097 | 0 | 18 Nov, 2021 |
| Utpal Koppikar | Chief Financial Officer | 181,978 | 0 | 06 Mar, 2023 |
| Pascal Touchon | President And Ceo | 77,955 | 0 | 12 Jun, 2025 |
| Kristin Yarema | Chief Commercial Officer | 171,415 | 0 | 03 Mar, 2022 |
| Amar Murugan | Evp, Chief Legal Officer | 26,827 | 0 | 20 Aug, 2024 |
| Maria Grazia Roncarolo | - | 17,368 | 0 | 12 Jun, 2025 |
| Ameet Mallik | - | 16,928 | 0 | 12 Jun, 2025 |
| Charlene A. Banard | Evp, Chief Technical Officer | 276,010 | 0 | 18 May, 2023 |
| Anhco Nguyen | President And Ceo | 143,078 | 0 | 11 Mar, 2026 |
| Jill Henrich | Evp, Chief Regulatory Officer | 18,679 | 0 | 05 Mar, 2025 |
| Innovation Ltd Panacea | - | 0 | 307,894 | 19 Mar, 2026 |
| Capital Fund I Lp Adiumentum | - | 1,209,395 | 0 | 16 May, 2025 |
| Yanina Grant-Huerta | Chief Accounting Officer | 52,050 | 0 | 11 Mar, 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Mar, 2026 | Innovation Ltd Panacea | Common Stock | A | 259,163 | $0.00 | 307,899 | I | M |
| 17 Mar, 2026 | Innovation Ltd Panacea | Common Stock | A | 259,163 | $0.00 | 307,899 | I | M |
| 17 Mar, 2026 | Innovation Ltd Panacea | Common Stock | D | 5 | $5.23 | 307,894 | I | F |
| 17 Mar, 2026 | Innovation Ltd Panacea | Common Stock | D | 5 | $5.23 | 307,894 | I | F |
| 17 Mar, 2026 | Innovation Ltd Panacea | Warrants | D | 259,163 | $6.61 | 0 | I | M |
| 17 Mar, 2026 | Innovation Ltd Panacea | Warrants | D | 259,163 | $6.61 | 0 | I | M |
| 09 Mar, 2026 | Yanina Grant-Huerta | Common Stock | A | 20,300 | $0.00 | 52,050 | D | A |
| 09 Mar, 2026 | Anhco Nguyen | Common Stock | A | 81,100 | $0.00 | 143,078 | D | A |
| 09 Mar, 2026 | Anhco Nguyen | Common Stock | A | 81,100 | $0.00 | 143,078 | D | A |
| 09 Mar, 2026 | Yanina Grant-Huerta | Common Stock | A | 20,300 | $0.00 | 52,050 | D | A |
| 02 Mar, 2026 | Anhco Nguyen | Common Stock | D | 198 | $5.08 | 64,776 | D | S |
| 02 Mar, 2026 | Yanina Grant-Huerta | Common Stock | D | 24 | $5.08 | 33,830 | D | S |
| 02 Mar, 2026 | Anhco Nguyen | Common Stock | D | 198 | $5.08 | 64,776 | D | S |
| 02 Mar, 2026 | Yanina Grant-Huerta | Common Stock | D | 24 | $5.08 | 33,830 | D | S |
| 02 Mar, 2026 | Yanina Grant-Huerta | Common Stock | D | 1,603 | $5.08 | 32,227 | D | S |
| 02 Mar, 2026 | Anhco Nguyen | Common Stock | D | 58 | $5.08 | 64,718 | D | S |
| 02 Mar, 2026 | Anhco Nguyen | Common Stock | D | 58 | $5.08 | 64,718 | D | S |
| 02 Mar, 2026 | Yanina Grant-Huerta | Common Stock | D | 1,603 | $5.08 | 32,227 | D | S |
| 02 Mar, 2026 | Yanina Grant-Huerta | Common Stock | D | 377 | $5.08 | 31,850 | D | S |
| 02 Mar, 2026 | Yanina Grant-Huerta | Common Stock | D | 377 | $5.08 | 31,850 | D | S |