Atara Biotherapeutics, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Panacea Innovation Ltd | — | Option Exercise | 48,737 | — | — | 48,737 | Nov 28, 2025 |
| Nguyen AnhCo | President and CEO | Sale | 2,859 | $13.19 | $37,710 | 65,030 | Nov 17, 2025 |
| Grant-Huerta Yanina | Chief Accounting Officer | Sale | 85 | $13.19 | $1,121 | 33,528 | Nov 17, 2025 |
| Nguyen AnhCo | President and CEO | Sale | 1,281 | $11.62 | $14,885 | 69,509 | Aug 18, 2025 |
| Grant-Huerta Yanina | Chief Accounting Officer | Sale | 1,668 | $11.61 | $19,365 | 35,258 | Aug 18, 2025 |
| Panacea Innovation Ltd | — | Purchase | 55,000 | $12.19 | $670,450 | 1,405,000 | Aug 15, 2025 |
| Huang James | — | Purchase | 19,335 | $9.64 | $186,389 | 1,350,000 | Jul 17, 2025 |
| Gallagher Carol Giltner | — | Award / Grant | 7,828 | — | — | 33,012 | Jun 10, 2025 |
| Fust Matthew K | — | Award / Grant | 7,828 | — | — | 18,188 | Jun 10, 2025 |
| Touchon Pascal | — | Award / Grant | 7,828 | — | — | 77,955 | Jun 10, 2025 |
| Roncarolo Maria Grazia | — | Award / Grant | 7,828 | — | — | 17,368 | Jun 10, 2025 |
| MALLIK AMEET | — | Award / Grant | 7,828 | — | — | 16,928 | Jun 10, 2025 |
| HEIDEN WILLIAM K | — | Award / Grant | 7,828 | — | — | 22,188 | Jun 10, 2025 |
| Grant-Huerta Yanina | Chief Accounting Officer | Sale | 2,218 | $6.76 | $14,994 | 37,067 | May 16, 2025 |
| Nguyen AnhCo | President and CEO | Sale | 3,276 | $6.76 | $22,146 | 70,847 | May 16, 2025 |
| Adiumentum Capital Fund I GP LLC | — | Award / Grant | 75,572 | $6.61 | $499,531 | 1,209,395 | May 16, 2025 |
| Nguyen AnhCo | President and CEO | Sale | 3,331 | $7.00 | $23,317 | 74,123 | Mar 3, 2025 |
| Hyllengren Eric J | EVP, CFO and COO | Sale | 1,211 | $7.00 | $8,477 | 56,231 | Mar 3, 2025 |
| Henrich Jill | EVP, Chief Regulatory Officer | Sale | 1,059 | $7.00 | $7,413 | 18,679 | Mar 3, 2025 |
| Hyllengren Eric J | EVP, CFO and COO | Award / Grant | 34,050 | — | — | 57,442 | Jan 27, 2025 |
| Henrich Jill | EVP, Chief Regulatory Officer | Sale | 1,000 | $11.20 | $11,200 | 19,378 | Nov 18, 2024 |
| Hyllengren Eric J | EVP, CFO and COO | Sale | 1,364 | $11.20 | $15,277 | 23,392 | Nov 18, 2024 |
| Nguyen AnhCo | President and CEO | Sale | 1,664 | $11.20 | $18,637 | 77,454 | Nov 18, 2024 |
| Nguyen AnhCo | President and CEO | Award / Grant | 45,000 | — | — | 79,118 | Sep 9, 2024 |
| Touchon Pascal | President and CEO | Sale | 2,762 | $6.63 | $18,312 | 70,403 | Aug 16, 2024 |
| Nguyen AnhCo | EVP, Chief Sci. & Tech Officer | Sale | 56 | $6.63 | $371 | 34,118 | Aug 16, 2024 |
| Murugan Amar | EVP, Chief Legal Officer | Sale | 192 | $6.63 | $1,273 | 26,916 | Aug 16, 2024 |
| Hyllengren Eric J | EVP, CFO | Sale | 1,041 | $6.63 | $6,902 | 24,785 | Aug 16, 2024 |
| Henrich Jill | EVP, Global Head RA & Quality | Sale | 831 | $6.63 | $5,510 | 20,510 | Aug 16, 2024 |
| Touchon Pascal | President and CEO | Sale | 81,506 | $0.62 | $50,534 | 1,829,146 | May 16, 2024 |
| Nguyen AnhCo | EVP, Chief Sci. & Tech Officer | Sale | 42,899 | $0.62 | $26,597 | 898,498 | May 16, 2024 |
| Murugan Amar | EVP, Chief Legal Officer | Sale | 32,401 | $0.62 | $20,089 | 695,120 | May 16, 2024 |
| Hyllengren Eric J | EVP, CFO | Sale | 28,648 | $0.62 | $17,762 | 645,671 | May 16, 2024 |
| Henrich Jill | EVP, Global Head RA & Quality | Sale | 25,750 | $0.62 | $15,965 | 529,251 | May 16, 2024 |
| Fust Matthew K | — | Award / Grant | 150,000 | — | — | 259,000 | Mar 31, 2024 |
| HEIDEN WILLIAM K | — | Award / Grant | 150,000 | — | — | 359,000 | Mar 31, 2024 |
| Roncarolo Maria Grazia | — | Award / Grant | 150,000 | — | — | 238,500 | Mar 31, 2024 |
| Gallagher Carol Giltner | — | Award / Grant | 150,000 | — | — | 629,608 | Mar 31, 2024 |
| MALLIK AMEET | — | Award / Grant | 150,000 | — | — | 227,500 | Mar 31, 2024 |
| Touchon Pascal | President and CEO | Sale | 24,844 | $0.72 | $17,888 | 1,910,652 | Mar 4, 2024 |
| Nguyen AnhCo | EVP, Chief Sci. & Tech Officer | Sale | 10,746 | $0.72 | $7,737 | 941,397 | Mar 4, 2024 |
| Murugan Amar | EVP, Chief Legal Officer | Sale | 10,044 | $0.72 | $7,232 | 727,521 | Mar 4, 2024 |
| Hyllengren Eric J | EVP, CFO | Sale | 5,217 | $0.72 | $3,756 | 674,319 | Mar 4, 2024 |
| Henrich Jill | EVP, Global Head RA & Quality | Sale | 3,879 | $0.72 | $2,793 | 555,001 | Mar 4, 2024 |
| Touchon Pascal | President and CEO | Award / Grant | 1,280,000 | — | — | 1,935,496 | Jan 8, 2024 |
| Nguyen AnhCo | EVP, Chief Sci. & Tech Officer | Award / Grant | 675,000 | — | — | 952,143 | Jan 8, 2024 |
| Murugan Amar | EVP, Chief Legal Officer | Award / Grant | 475,000 | — | — | 737,565 | Jan 8, 2024 |
| Hyllengren Eric J | EVP, CFO | Award / Grant | 475,000 | — | — | 680,998 | Jan 8, 2024 |
| Henrich Jill | EVP, Global Head RA & Quality | Award / Grant | 450,000 | — | — | 558,880 | Jan 8, 2024 |
| Touchon Pascal | President and CEO | Sale | 20,409 | $0.39 | $7,960 | 655,496 | Nov 16, 2023 |