ATRA Atara Biotherapeutics, Inc.
Nasdaq · SEC CIK 1604464 · EDGAR
- Bought, last 12 months
- $5.74M 2 purchases by 2 insiders
- Sold, last 12 months
- $3.85M 9 sales by 4 insiders
- Filings on record
- 153 since 2021-08-10, latest 2026-09-04 18:20
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| EcoR1 Capital, LLC | 10% | $4.74M | — |
| Panacea Innovation Ltd | 10% | — | $3.17M |
| Cherry Brian N | Dir | $1000.0K | — |
| Huang James | Dir, 10% | — | $489.0K |
| Nguyen AnhCo | Pres, CEO, Dir | — | $142.4K |
| Grant-Huerta Yanina | CAO | — | $56.5K |
| Ciongoli Gregory Austin | Dir, 10%, See Remarks | — | — |
| Redmile Group, LLC | Dir | — | — |
| Fust Matthew K | Dir | — | — |
| HEIDEN WILLIAM K | Dir | — | — |
Transactions 163
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-09-04 18:20 | 2026-09-04 | ATRA | Cherry Brian N | Dir | P - Purchase | $9.60 | +104.2K | 166.5K | +167% | +$1000.0K | |
| 2026-08-26 19:45 | 2026-08-17 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | S - Sale | $8.08 | -5,062 | 132.8K | -4% | -$40.9K | |
| DI | 2026-07-24 21:00 | 2026-07-22 | ATRA | Redmile Group, LLC | Dir | M - OptEx | — | +195.2K | 636.9K | +44% | — |
| DI | 2026-07-24 21:00 | 2026-07-22 | ATRA | Redmile Group, LLC | Dir | F - Tax | — | -60 | 636.9K | -0.0% | — |
| 2026-06-15 18:51 | 2026-06-11 | ATRA | Cherry Brian N | Dir | A - Grant | $0.00 | +24.0K | 62.3K | +63% | $0 | |
| 2026-06-11 16:37 | 2026-06-09 | ATRA | HEIDEN WILLIAM K | Dir | A - Grant | $0.00 | +12.0K | 34.2K | +54% | $0 | |
| 2026-06-11 16:36 | 2026-06-09 | ATRA | Fust Matthew K | Dir | A - Grant | $0.00 | +12.0K | 30.2K | +66% | $0 | |
| 2026-06-11 16:36 | 2026-06-09 | ATRA | Ciongoli Gregory Austin | Dir, 10%, See Remarks | A - Grant | $0.00 | +12.0K | 12.0K | New | $0 | |
| 2026-05-20 17:24 | 2026-05-18 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | S - Sale | $9.13 | -5,241 | 137.8K | -4% | -$47.8K | |
| 2026-05-20 17:24 | 2026-05-18 | ATRA | Grant-Huerta Yanina | CAO | S - Sale | $9.13 | -2,414 | 49.6K | -5% | -$22.0K | |
| I | 2026-05-11 18:45 | 2026-05-07 | ATRA | Panacea Innovation Ltd | 10% | S - Sale | $10.10 | -313.4K | 1.01M | -24% | -$3.17M |
| I | 2026-05-11 17:34 | 2026-05-07 | ATRA | EcoR1 Capital, LLC | 10% | P - Purchase | $9.35 | +507.4K | 1.55M | +49% | +$4.74M |
| DI | 2026-03-19 | 2026-03-17 | ATRA | Panacea Innovation Ltd | 10% | M - OptEx | $0.00 | +259.2K | 307.9K | +532% | $0 |
| DI | 2026-03-19 | 2026-03-17 | ATRA | Panacea Innovation Ltd | 10% | F - Tax | $5.23 | -5 | 307.9K | -0.0% | -$26.15 |
| 2026-03-11 | 2026-03-09 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | A - Grant | $0.00 | +81.1K | 143.1K | +131% | $0 | |
| 2026-03-11 | 2026-03-09 | ATRA | Grant-Huerta Yanina | CAO | A - Grant | $0.00 | +20.3K | 52.0K | +64% | $0 | |
| M | 2026-03-04 | 2026-03-02 | ATRA | Grant-Huerta Yanina | CAO | S - Sale | $5.08 | -2,104 | 31.8K | -6% | -$10.7K |
| M | 2026-03-04 | 2026-03-02 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | S - Sale | $5.09 | -2,996 | 62.0K | -5% | -$15.2K |
| I | 2026-01-14 | 2026-01-12 | ATRA | Huang James | Dir, 10% | S - Sale | $6.07 | -80.6K | 1.32M | -6% | -$489.0K |
| DI | 2025-12-01 | 2025-11-28 | ATRA | Panacea Innovation Ltd | 10% | F - Tax | $14.03 | -1 | 48.7K | -0.0% | -$14.03 |
| DI | 2025-12-01 | 2025-11-28 | ATRA | Panacea Innovation Ltd | 10% | M - OptEx | $0.00 | +48.7K | 48.7K | New | $0 |
| M | 2025-11-19 | 2025-11-17 | ATRA | Grant-Huerta Yanina | CAO | S - Sale | $13.19 | -1,804 | 33.5K | -5% | -$23.8K |
| M | 2025-11-19 | 2025-11-17 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | S - Sale | $13.19 | -2,915 | 65.0K | -4% | -$38.4K |
| M | 2025-08-20 | 2025-08-18 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | S - Sale | $11.62 | -2,958 | 69.5K | -4% | -$34.4K |
| M | 2025-08-20 | 2025-08-18 | ATRA | Grant-Huerta Yanina | CAO | S - Sale | $11.61 | -1,809 | 35.3K | -5% | -$21.0K |
| I | 2025-08-19 | 2025-08-15 | ATRA | Panacea Innovation Ltd | 10% | P - Purchase | $12.19 | +55.0K | 1.41M | +4% | +$670.5K |
| I | 2025-07-21 | 2025-07-17 | ATRA | Huang James | Dir, 10% | P - Purchase | $9.64 | +19.3K | 1.35M | +1% | +$186.4K |
| 2025-06-12 | 2025-06-10 | ATRA | MALLIK AMEET | Dir | A - Grant | $0.00 | +7,828 | 16.9K | +86% | $0 | |
| 2025-06-12 | 2025-06-10 | ATRA | Roncarolo Maria Grazia | Dir | A - Grant | $0.00 | +7,828 | 17.4K | +82% | $0 | |
| 2025-06-12 | 2025-06-10 | ATRA | Touchon Pascal | Dir | A - Grant | $0.00 | +7,828 | 78.0K | +11% | $0 | |
| 2025-06-12 | 2025-06-10 | ATRA | HEIDEN WILLIAM K | Dir | A - Grant | $0.00 | +7,828 | 22.2K | +55% | $0 | |
| 2025-06-12 | 2025-06-10 | ATRA | Fust Matthew K | Dir | A - Grant | $0.00 | +7,828 | 18.2K | +76% | $0 | |
| 2025-06-12 | 2025-06-10 | ATRA | Gallagher Carol Giltner | Dir | A - Grant | $0.00 | +7,828 | 33.0K | +31% | $0 | |
| 2025-05-20 | 2025-05-16 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | S - Sale | $6.76 | -3,276 | 70.8K | -4% | -$22.1K | |
| 2025-05-20 | 2025-05-16 | ATRA | Grant-Huerta Yanina | CAO | S - Sale | $6.76 | -2,218 | 37.1K | -6% | -$15.0K | |
| D | 2025-05-16 | 2025-05-16 | ATRA | Adiumentum Capital Fund I GP LLC | Dir, 10%, See remarks | A - Grant | $6.61 | +75.6K | 1.21M | +7% | +$499.5K |
| 2025-03-05 | 2025-03-03 | ATRA | Henrich Jill | EVP, Chief Regulatory Off | S - Sale | $7.00 | -1,059 | 18.7K | -5% | -$7,413 | |
| 2025-03-05 | 2025-03-03 | ATRA | Hyllengren Eric J | EVP, CFO, COO | S - Sale | $7.00 | -1,211 | 56.2K | -2% | -$8,477 | |
| 2025-03-05 | 2025-03-03 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | S - Sale | $7.00 | -3,331 | 74.1K | -4% | -$23.3K | |
| 2025-01-29 | 2025-01-27 | ATRA | Hyllengren Eric J | EVP, CFO, COO | A - Grant | $0.00 | +34.0K | 57.4K | +146% | $0 | |
| 2024-11-20 | 2024-11-18 | ATRA | Henrich Jill | EVP, Chief Regulatory Off | S - Sale | $11.20 | -1,000 | 19.4K | -5% | -$11.2K | |
| 2024-11-20 | 2024-11-18 | ATRA | Hyllengren Eric J | EVP, CFO, COO | S - Sale | $11.20 | -1,364 | 23.4K | -6% | -$15.3K | |
| 2024-11-20 | 2024-11-18 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | S - Sale | $11.20 | -1,664 | 77.5K | -2% | -$18.6K | |
| 2024-09-11 | 2024-09-09 | ATRA | Nguyen AnhCo | Pres, CEO, Dir | A - Grant | $0.00 | +45.0K | 79.1K | +132% | $0 | |
| M | 2024-08-20 | 2024-08-16 | ATRA | Touchon Pascal | Pres, CEO, Dir | S - Sale | $6.63 | -3,038 | 70.4K | -4% | -$20.1K |
| M | 2024-08-20 | 2024-08-16 | ATRA | Murugan Amar | EVP, CLO | S - Sale | $6.63 | -1,158 | 26.9K | -4% | -$7,678 |
| M | 2024-08-20 | 2024-08-16 | ATRA | Henrich Jill | EVP, Gbl Head RA, Quality | S - Sale | $6.63 | -963 | 20.5K | -4% | -$6,385 |
| M | 2024-08-20 | 2024-08-16 | ATRA | Nguyen AnhCo | EVP, Chief Sci, Tech Off | S - Sale | $6.63 | -1,821 | 34.1K | -5% | -$12.1K |
| M | 2024-08-20 | 2024-08-16 | ATRA | Hyllengren Eric J | EVP, CFO | S - Sale | $6.63 | -1,070 | 24.8K | -4% | -$7,094 |
| 2024-05-20 | 2024-05-16 | ATRA | Hyllengren Eric J | EVP, CFO | S - Sale | $0.62 | -28.6K | 645.7K | -4% | -$17.8K | |
| 2024-05-20 | 2024-05-16 | ATRA | Henrich Jill | EVP, Gbl Head RA, Quality | S - Sale | $0.62 | -25.8K | 529.3K | -5% | -$16.0K | |
| 2024-05-20 | 2024-05-16 | ATRA | Murugan Amar | EVP, CLO | S - Sale | $0.62 | -32.4K | 695.1K | -4% | -$20.1K | |
| 2024-05-20 | 2024-05-16 | ATRA | Touchon Pascal | Pres, CEO, Dir | S - Sale | $0.62 | -81.5K | 1.83M | -4% | -$50.5K | |
| 2024-05-20 | 2024-05-16 | ATRA | Nguyen AnhCo | EVP, Chief Sci, Tech Off | S - Sale | $0.62 | -42.9K | 898.5K | -5% | -$26.6K | |
| 2024-04-02 | 2024-03-31 | ATRA | Roncarolo Maria Grazia | Dir | A - Grant | $0.00 | +150.0K | 238.5K | +169% | $0 | |
| 2024-04-02 | 2024-03-31 | ATRA | HEIDEN WILLIAM K | Dir | A - Grant | $0.00 | +150.0K | 359.0K | +72% | $0 | |
| 2024-04-02 | 2024-03-31 | ATRA | Fust Matthew K | Dir | A - Grant | $0.00 | +150.0K | 259.0K | +138% | $0 | |
| 2024-04-02 | 2024-03-31 | ATRA | MALLIK AMEET | Dir | A - Grant | $0.00 | +150.0K | 227.5K | +194% | $0 | |
| 2024-04-02 | 2024-03-31 | ATRA | Gallagher Carol Giltner | Dir | A - Grant | $0.00 | +150.0K | 629.6K | +31% | $0 | |
| M | 2024-03-06 | 2024-03-04 | ATRA | Hyllengren Eric J | EVP, CFO | S - Sale | $0.72 | -6,679 | 674.3K | -1.0% | -$4,809 |
| 2024-03-06 | 2024-03-04 | ATRA | Nguyen AnhCo | EVP, Chief Sci, Tech Off | S - Sale | $0.72 | -10.7K | 941.4K | -1% | -$7,737 | |
| 2024-03-06 | 2024-03-04 | ATRA | Henrich Jill | EVP, Gbl Head RA, Quality | S - Sale | $0.72 | -3,879 | 555.0K | -0.7% | -$2,793 | |
| 2024-03-06 | 2024-03-04 | ATRA | Murugan Amar | EVP, CLO | S - Sale | $0.72 | -10.0K | 727.5K | -1% | -$7,232 | |
| 2024-03-06 | 2024-03-04 | ATRA | Touchon Pascal | Pres, CEO, Dir | S - Sale | $0.72 | -24.8K | 1.91M | -1% | -$17.9K | |
| 2024-01-09 | 2024-01-08 | ATRA | Touchon Pascal | Pres, CEO, Dir | A - Grant | $0.00 | +1.28M | 1.94M | +195% | $0 | |
| 2024-01-09 | 2024-01-08 | ATRA | Murugan Amar | EVP, CLO | A - Grant | $0.00 | +475.0K | 737.6K | +181% | $0 | |
| 2024-01-09 | 2024-01-08 | ATRA | Henrich Jill | EVP, Gbl Head RA, Quality | A - Grant | $0.00 | +450.0K | 558.9K | +413% | $0 | |
| 2024-01-09 | 2024-01-08 | ATRA | Hyllengren Eric J | EVP, CFO | A - Grant | $0.00 | +475.0K | 681.0K | +231% | $0 | |
| 2024-01-09 | 2024-01-08 | ATRA | Nguyen AnhCo | EVP, Chief Sci, Tech Off | A - Grant | $0.00 | +675.0K | 952.1K | +244% | $0 | |
| 2023-11-20 | 2023-11-16 | ATRA | Hyllengren Eric J | SVP, CFO | S - Sale | $0.39 | -12.0K | 206.0K | -5% | -$4,664 | |
| 2023-11-20 | 2023-11-16 | ATRA | Touchon Pascal | Pres, CEO, Dir | S - Sale | $0.39 | -20.4K | 655.5K | -3% | -$7,960 | |
| 2023-11-20 | 2023-11-16 | ATRA | Murugan Amar | EVP, CLO | S - Sale | $0.39 | -8,307 | 257.1K | -3% | -$3,240 | |
| 2023-11-20 | 2023-11-16 | ATRA | Henrich Jill | EVP, Gbl Head RA, Quality | S - Sale | $0.39 | -3,267 | 104.4K | -3% | -$1,274 | |
| 2023-11-20 | 2023-11-16 | ATRA | Nguyen AnhCo | EVP, Chief Sci, Tech Off | S - Sale | $0.39 | -8,856 | 277.1K | -3% | -$3,454 | |
| 2023-11-20 | 2023-11-16 | ATRA | Joshi Manher | EVP, Chief Medical Off | S - Sale | $0.39 | -12.3K | 171.3K | -7% | -$4,792 | |
| M | 2023-11-15 | 2023-11-13+ | ATRA | Gallagher Carol Giltner | Dir | P - Purchase | $0.2503 | +270.0K | 459.4K | +143% | +$67.6K |
| 2023-11-14 | 2023-11-10 | ATRA | HEIDEN WILLIAM K | Dir | P - Purchase | $0.25 | +100.0K | 209.0K | +92% | +$25.0K | |
| 2023-11-14 | 2023-11-10 | ATRA | DOBMEIER ERIC | Dir | P - Purchase | $0.23 | +446.8K | 563.3K | +384% | +$102.8K | |
| M | 2023-08-18 | 2023-08-16 | ATRA | Henrich Jill | EVP, Gbl Head RA, Quality | S - Sale | $1.65 | -3,346 | 107.7K | -3% | -$5,521 |
| M | 2023-08-18 | 2023-08-16 | ATRA | Murugan Amar | EVP, CLO | S - Sale | $1.65 | -8,672 | 265.4K | -3% | -$14.3K |
| M | 2023-08-18 | 2023-08-16 | ATRA | Touchon Pascal | Pres, CEO, Dir | S - Sale | $1.65 | -30.8K | 685.2K | -4% | -$50.8K |
| M | 2023-08-18 | 2023-08-16 | ATRA | Hyllengren Eric J | SVP, CFO | S - Sale | $1.65 | -8,186 | 218.0K | -4% | -$13.5K |
| M | 2023-08-18 | 2023-08-16 | ATRA | Joshi Manher | EVP, Chief Medical Off | S - Sale | $1.65 | -6,975 | 183.6K | -4% | -$11.5K |
| M | 2023-08-18 | 2023-08-16 | ATRA | Nguyen AnhCo | EVP, Chief Sci, Tech Off | S - Sale | $1.65 | -15.1K | 295.3K | -5% | -$25.0K |
| 2023-06-29 | 2023-06-27 | ATRA | Touchon Pascal | Pres, CEO, Dir | S - Sale | $1.66 | -14.3K | 706.7K | -2% | -$23.7K | |
| D | 2023-06-02 | 2023-05-31 | ATRA | Gallagher Carol Giltner | Dir | A - Grant | $0.00 | +57.0K | 189.4K | +43% | $0 |
| D | 2023-06-02 | 2023-05-31 | ATRA | Roncarolo Maria Grazia | Dir | A - Grant | $0.00 | +57.0K | 88.5K | +181% | $0 |
| D | 2023-06-02 | 2023-05-31 | ATRA | HEIDEN WILLIAM K | Dir | A - Grant | $0.00 | +57.0K | 109.0K | +110% | $0 |
| D | 2023-06-02 | 2023-05-31 | ATRA | Fust Matthew K | Dir | A - Grant | $0.00 | +57.0K | 109.0K | +110% | $0 |
| D | 2023-06-02 | 2023-05-31 | ATRA | MALLIK AMEET | Dir | A - Grant | $0.00 | +57.0K | 77.5K | +278% | $0 |
| D | 2023-06-02 | 2023-05-31 | ATRA | SEIDENBERG BETH C | Dir | A - Grant | $0.00 | +57.0K | 115.7K | +97% | $0 |
| D | 2023-06-02 | 2023-05-31 | ATRA | DOBMEIER ERIC | Dir | A - Grant | $0.00 | +57.0K | 116.5K | +96% | $0 |
| 2023-05-18 | 2023-05-16 | ATRA | Banard Charlene A. | EVP, Chief Technical Off | S - Sale | $2.04 | -19.0K | 276.0K | -6% | -$38.8K | |
| M | 2023-05-18 | 2023-05-16 | ATRA | Hyllengren Eric J | SVP, CFO | S - Sale | $2.04 | -7,918 | 227.9K | -3% | -$16.2K |
| 2023-05-18 | 2023-05-16 | ATRA | Touchon Pascal | Pres, CEO, Dir | S - Sale | $2.04 | -29.8K | 721.0K | -4% | -$60.7K | |
| M | 2023-05-18 | 2023-05-16 | ATRA | Murugan Amar | EVP, CLO | S - Sale | $2.04 | -8,389 | 271.9K | -3% | -$17.1K |
| 2023-03-06 | 2023-03-02 | ATRA | Touchon Pascal | Pres, CEO, Dir | S - Sale | $3.63 | -15.7K | 750.7K | -2% | -$56.9K | |
| 2023-03-06 | 2023-03-02 | ATRA | Dupont Jakob | EVP, Head of R, D | S - Sale | $3.63 | -5,074 | 290.8K | -2% | -$18.4K | |
| 2023-03-06 | 2023-03-02 | ATRA | Koppikar Utpal | CFO | S - Sale | $3.63 | -6,871 | 182.0K | -4% | -$24.9K | |
| 2023-03-06 | 2023-03-02 | ATRA | Murugan Amar | SVP, GC, Sec | S - Sale | $3.63 | -4,221 | 279.3K | -1% | -$15.3K |
Purchase Sale Sale after option exercise All abbreviations