Atara Biotherapeutics, Inc.(ATRA)
Biotechnology
Cell Therapy (CAR-T, etc.)
| Filing Date | Insider | Type | 10b5-1 | Net Shares | Ownership change | Avg. Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-05-20 | Nguyen AnhCo President and CEO | Sale | -5,241 | -3.66%137,837 | $9.13 | $47,845 | View SEC filing | |
| 2026-05-20 | Grant-Huerta Yanina Chief Accounting Officer | Sale | -2,414 | -4.64%49,636 | $9.13 | $22,036 | View SEC filing | |
| 2026-05-11 | Huang James Director, 10% Owner | Sale | -313,446 | -23.67%1,011,000 | $10.10 | $3,165,021 | View SEC filing | |
| 2026-05-11 | EcoR1 Capital, LLC 10% Owner | Purchase | +507,407 | +48.57%1,552,000 | $9.35 | $4,744,255 | View SEC filing | |
| 2026-03-04 | Grant-Huerta Yanina Chief Accounting Officer | Sale | -2,104 | -6.21%31,750 | $5.08 | $10,691 | View SEC filing | |
| 2026-03-04 | Nguyen AnhCo President and CEO | Sale | -2,996 | -4.61%61,978 | $5.09 | $15,237 | View SEC filing | |
| 2026-01-14 | Huang James Director, 10% Owner | Sale | -80,554 | -5.73%1,324,446 | $6.07 | $489,019 | View SEC filing | |
| 2025-11-19 | Nguyen AnhCo President and CEO | Sale | -2,915 | -4.29%64,974 | $13.19 | $38,437 | View SEC filing | |
| 2025-11-19 | Grant-Huerta Yanina Chief Accounting Officer | Sale | -1,804 | -5.12%33,454 | $13.19 | $23,788 | View SEC filing | |
| 2025-08-20 | Nguyen AnhCo President and CEO | Sale | -2,958 | -4.18%67,889 | $11.62 | $34,360 | View SEC filing | |
| 2025-08-20 | Grant-Huerta Yanina Chief Accounting Officer | Sale | -1,809 | -4.88%35,258 | $11.61 | $21,009 | View SEC filing | |
| 2025-08-19 | Huang James Director, 10% Owner | Purchase | +55,000 | +4.07%1,405,000 | $12.19 | $670,423 | View SEC filing | |
| 2025-07-21 | Huang James Director, 10% Owner | Purchase | +19,335 | +1.45%1,350,000 | $9.64 | $186,372 | View SEC filing | |
| 2025-05-20 | Grant-Huerta Yanina Chief Accounting Officer | Sale | -2,218 | -5.65%37,067 | $6.76 | $15,000 | View SEC filing | |
| 2025-05-20 | Nguyen AnhCo President and CEO | Sale | -3,276 | -4.42%70,847 | $6.76 | $22,156 | View SEC filing | |
| 2025-03-05 | Nguyen AnhCo President and CEO | Sale | -3,331 | -4.30%74,123 | $7.00 | $23,307 | View SEC filing | |
| 2025-03-05 | Hyllengren Eric J EVP, CFO and COO | Sale | -1,211 | -2.11%56,231 | $7.00 | $8,473 | View SEC filing | |
| 2025-03-05 | Henrich Jill EVP, Chief Regulatory Officer | Sale | -1,059 | -5.37%18,679 | $7.00 | $7,410 | View SEC filing | |
| 2024-11-20 | Henrich Jill EVP, Chief Regulatory Officer | Sale | -1,000 | -4.91%19,378 | $11.20 | $11,198 | View SEC filing | |
| 2024-11-20 | Hyllengren Eric J EVP, CFO and COO | Sale | -1,364 | -5.51%23,392 | $11.20 | $15,274 | View SEC filing | |
| 2024-11-20 | Nguyen AnhCo President and CEO | Sale | -1,664 | -2.10%77,454 | $11.20 | $18,633 | View SEC filing | |
| 2024-08-20 | Touchon Pascal President and CEO | Sale | -3,038 | -4.15%70,127 | $6.63 | $20,139 | View SEC filing | |
| 2024-08-20 | Nguyen AnhCo EVP, Chief Sci. & Tech Officer | Sale | -1,821 | -5.07%34,118 | $6.63 | $12,072 | View SEC filing | |
| 2024-08-20 | Murugan Amar EVP, Chief Legal Officer | Sale | -1,158 | -4.14%26,827 | $6.63 | $7,677 | View SEC filing | |
| 2024-08-20 | Hyllengren Eric J EVP, CFO | Sale | -1,070 | -4.14%24,756 | $6.63 | $7,093 | View SEC filing |
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