Atara Biotherapeutics, Inc.
ATRA- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001604464
In the last 90 days, Atara Biotherapeutics, Inc. insiders filed 1 open-market purchase and 1 sale; 36 institutions reported holding it in 13F filings for Q2 2026, worth $51.3M in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Atara Biotherapeutics, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 1 filing
- 1 insider, $1.00M in total
- Open-market sells
- 1 filing
- 1 insider, $40.9K in total
- Insiders trading
- 2
- Net value
- +$959.1K
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Atara Biotherapeutics, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Cherry Brian N | Director | 166,486 | Sep 4, 2026 | 2 |
| Nguyen AnhCo | President and CEO | 132,775 | Aug 26, 2026 | 5 |
| Redmile Group, LLC | Director | 636,852Indirect | Jul 24, 2026 | 1 |
| Green Jeremy | Director | 636,852Indirect | Jul 24, 2026 | 1 |
| Heiden William K | Director | 34,188 | Jun 11, 2026 | 1 |
| Fust Matthew K | Director | 30,188 | Jun 11, 2026 | 1 |
| Ciongoli Gregory Austin | Director, 10% Owner, Other: See Remarks | 12,000 | Jun 11, 2026 | 1 |
| Grant-Huerta Yanina | Chief Accounting Officer | 49,636 | May 20, 2026 | 4 |
| Huang James | Director, 10% Owner | 1,011,000Indirect | May 11, 2026 | 4 |
| Panacea Innovation Ltd | 10% Owner | 1,011,000Indirect | May 11, 2026 | 4 |
| EcoR1 Capital, LLC | 10% Owner | 1,552,000Indirect | May 11, 2026 | 1 |
| Gallagher Carol Giltner | Director | 33,012 | Jun 12, 2025 | 0 |
| Touchon Pascal | Director | 77,955 | Jun 12, 2025 | 0 |
| Roncarolo Maria Grazia | Director | 17,368 | Jun 12, 2025 | 0 |
| Mallik Ameet | Director | 16,928 | Jun 12, 2025 | 0 |
| Adiumentum Capital Fund I LP | Director, 10% Owner, Other: See remarks | 1,209,395 | May 16, 2025 | 0 |
| Adiumentum Capital Fund I GP LLC | Director, 10% Owner, Other: See remarks | 1,209,395 | May 16, 2025 | 0 |
| Hyllengren Eric J | Other: Former EVP, CFO & COO | 56,231 | Apr 2, 2025 | 0 |
| Henrich Jill | EVP, Chief Regulatory Officer | 18,679 | Mar 5, 2025 | 0 |
| Murugan Amar | EVP, Chief Legal Officer | 26,827 | Aug 20, 2024 | 0 |
| Joshi Manher | EVP, Chief Medical Officer | 171,284 | Nov 20, 2023 | 0 |
| Dobmeier Eric | Director | 563,325 | Nov 14, 2023 | 0 |
| Seidenberg Beth C | Director | 115,689 | Jun 2, 2023 | 0 |
| Banard Charlene A. | EVP, Chief Technical Officer | 276,010 | May 18, 2023 | 0 |
| Dupont Jakob | EVP, Head of R&D | 290,794 | Mar 6, 2023 | 0 |
| Koppikar Utpal | Chief Financial Officer | 181,978 | Mar 6, 2023 | 0 |
| Renaud Ronald C JR | Director | 31,500 | Jun 27, 2022 | 0 |
| Baynes Roy D. | Director | 43,500 | Jun 27, 2022 | 0 |
| Yarema Kristin | Chief Commercial Officer | 171,415 | Mar 3, 2022 | 0 |
| Newell Joe | Chief Operations Officer | 113,097 | Nov 18, 2021 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 19, 2021 (view filing) | Aug 17 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −2.15K | $12.53 | −$27.0K | −2.3%92.8K after | |
| Aug 19, 2021 (view filing) | Aug 17 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −3.58K | $12.53 | −$44.8K | −2.2%161.4K after | |
| Aug 19, 2021 (view filing) | Aug 17 | 2 days | Murugan AmarSVP, GC & Secretary | SSale | −2.08K | $12.53 | −$26.1K | −2.3%89.7K after | |
| Aug 19, 2021 (view filing) | Aug 17 | 2 days | Newell JoeChief Operations Officer | SSale | −2.43K | $12.53 | −$30.4K | −1.9%126.5K after | |
| Aug 19, 2021 (view filing) | Aug 17 | 2 days | Touchon PascalPresident and CEO | SSale | −8.22K | $12.53 | −$103.0K | −2.4%336.9K after | |
| Aug 31, 2021 (view filing) | Aug 30 | 1 day | Newell JoeChief Operations Officer | SSale | −3.50K | $15.00 | −$52.5K | −2.8%123.0K after | |
| Sep 17, 2021 (view filing) | Sep 15 | 2 days | Newell JoeChief Operations Officer | SSale | −3.12K | $15.61 | −$48.6K | −2.5%119.9K after | |
| Sep 24, 2021 (view filing) | Sep 22 | 2 days | Newell JoeChief Operations Officer | SSale | −10.5K | $17.00 | −$178.5K | −8.1%119.9K after | |
| Nov 4, 2021 (view filing) | Nov 2 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −5.00K | $16.41 | −$82.0K | −5.1%92.8K after | |
| Nov 5, 2021 (view filing) | Nov 4 | 1 day | Fust Matthew KDirector | SSale | −13.4K | $19.50 | −$260.4K | −29.8%31.5K after | |
| Nov 17, 2021 (view filing) | Nov 15 | 2 days | Newell JoeChief Operations Officer | SSale | −7.00K | $17.71 | −$124.0K | −5.7%116.4K after | |
| Nov 18, 2021 (view filing) | Nov 16 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −2.20K | $17.12 | −$37.6K | −2.4%90.6K after | |
| Nov 18, 2021 (view filing) | Nov 16 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −3.65K | $17.12 | −$62.6K | −2.3%157.7K after | |
| Nov 18, 2021 (view filing) | Nov 16 | 2 days | Murugan AmarSVP, GC & Secretary | SSale | −2.12K | $17.12 | −$36.4K | −2.4%87.5K after | |
| Nov 18, 2021 (view filing) | Nov 16 | 2 days | Newell JoeChief Operations Officer | SSale | −3.33K | $17.12 | −$57.0K | −2.9%113.1K after | |
| Nov 18, 2021 (view filing) | Nov 16 | 2 days | Touchon PascalPresident and CEO | SSale | −8.40K | $17.12 | −$143.8K | −2.5%328.5K after | |
| Dec 3, 2021 (view filing) | Dec 1 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −5.00K | $17.94 | −$89.7K | −5.2%90.6K after | |
| Jan 5, 2022 (view filing) | Jan 3 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −5.00K | $16.01 | −$80.0K | −5.2%90.6K after | |
| Feb 9, 2022 (view filing) | Feb 7 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −2.50K | $14.46 | −$36.1K | −1.6%155.7K after | |
| Feb 14, 2022 (view filing) | Feb 10 | 4 days | Dupont JakobEVP, Head of R&D | SSale | −5.00K | $16.00 | −$80.0K | −5.2%90.6K after | |
| Mar 3, 2022 (view filing) | Mar 1 | 2 days | Murugan AmarSVP, GC & Secretary | SSale | −2.58K | $9.86 | −$25.4K | −1.8%137.0K after | 2 lots |
| Mar 3, 2022 (view filing) | Mar 1 | 2 days | Touchon PascalPresident and CEO | SSale | −8.83K | $9.86 | −$87.0K | −1.7%500.2K after | |
| Mar 3, 2022 (view filing) | Mar 1 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −2.22K | $9.86 | −$21.9K | −1.3%166.9K after | |
| Mar 3, 2022 (view filing) | Mar 1 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −3.76K | $9.86 | −$37.1K | −1.7%213.2K after | 2 lots |
| May 19, 2022 (view filing) | May 17 | 2 days | Touchon PascalPresident and CEO | SSale | −13.9K | $5.32 | −$74.0K | −2.8%486.3K after | |
| May 19, 2022 (view filing) | May 17 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −3.87K | $5.32 | −$20.6K | −2.3%163.0K after | |
| May 19, 2022 (view filing) | May 17 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −5.58K | $5.32 | −$29.7K | −2.6%207.6K after | 2 lots |
| May 19, 2022 (view filing) | May 17 | 2 days | Murugan AmarSVP, GC & Secretary | SSale | −3.22K | $5.32 | −$17.1K | −2.4%133.7K after | 2 lots |
| Jun 10, 2022 (view filing) | Jun 8 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −5.85K | $5.63 | −$33.0K | −2.8%203.5K after | |
| Jun 29, 2022 (view filing) | Jun 27 | 2 days | Touchon PascalPresident and CEO | SSale | −14.2K | $7.20 | −$102.4K | −2.9%472.1K after | |
| Aug 18, 2022 (view filing) | Aug 16 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −5.94K | $5.04 | −$29.9K | −2.9%197.6K after | |
| Aug 18, 2022 (view filing) | Aug 16 | 2 days | Murugan AmarSVP, GC & Secretary | SSale | −3.43K | $5.04 | −$17.3K | −2.5%131.2K after | 2 lots |
| Aug 18, 2022 (view filing) | Aug 16 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −4.12K | $5.03 | −$20.7K | −2.5%158.9K after | |
| Aug 18, 2022 (view filing) | Aug 16 | 2 days | Touchon PascalPresident and CEO | SSale | −14.8K | $5.04 | −$74.6K | −3.1%457.3K after | |
| Nov 18, 2022 (view filing) | Nov 16 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −6.25K | $4.49 | −$28.1K | −3.2%191.3K after | 2 lots |
| Nov 18, 2022 (view filing) | Nov 16 | 2 days | Murugan AmarSVP, GC & Secretary | SSale | −3.61K | $4.49 | −$16.2K | −2.8%127.6K after | |
| Nov 18, 2022 (view filing) | Nov 16 | 2 days | Touchon PascalPresident and CEO | SSale | −15.6K | $4.49 | −$70.0K | −3.4%441.7K after | |
| Nov 18, 2022 (view filing) | Nov 16 | 2 days | Dupont JakobEVP, Head of R&D | SSale | −4.34K | $4.49 | −$19.5K | −2.7%154.5K after | 2 lots |
| Feb 9, 2023 (view filing) | Feb 7 | 2 days | Koppikar UtpalChief Financial Officer | SSale | −2.48K | $5.46 | −$13.6K | −1.3%188.8K after | |
| Mar 6, 2023 (view filing) | Mar 2 | 4 days | Dupont JakobEVP, Head of R&D | SSale | −5.07K | $3.63 | −$18.4K | −1.7%290.8K after | |
| Mar 6, 2023 (view filing) | Mar 2 | 4 days | Koppikar UtpalChief Financial Officer | SSale | −6.87K | $3.63 | −$24.9K | −3.6%182.0K after | |
| Mar 6, 2023 (view filing) | Mar 2 | 4 days | Murugan AmarSVP, GC & Secretary | SSale | −4.22K | $3.63 | −$15.3K | −1.5%279.3K after | |
| Mar 6, 2023 (view filing) | Mar 2 | 4 days | Touchon PascalPresident and CEO | SSale | −15.7K | $3.63 | −$56.9K | −2.0%750.7K after | |
| May 18, 2023 (view filing) | May 16 | 2 days | Hyllengren Eric JSVP, CFO | SSale | −7.92K | $2.04 | −$16.2K | −3.4%226.1K after | 2 lots |
| May 18, 2023 (view filing) | May 16 | 2 days | Touchon PascalPresident and CEO | SSale | −29.8K | $2.04 | −$60.7K | −4.0%721.0K after | |
| May 18, 2023 (view filing) | May 16 | 2 days | Murugan AmarEVP, Chief Legal Officer | SSale | −8.39K | $2.04 | −$17.1K | −3.0%270.9K after | 2 lots |
| May 18, 2023 (view filing) | May 16 | 2 days | Banard Charlene A.EVP, Chief Technical Officer | SSale | −19.0K | $2.04 | −$38.8K | −6.5%276.0K after | |
| Jun 29, 2023 (view filing) | Jun 27 | 2 days | Touchon PascalPresident and CEO | SSale | −14.3K | $1.66 | −$23.7K | −2.0%706.7K after | |
| Aug 18, 2023 (view filing) | Aug 16 | 2 days | Henrich JillEVP, Global Head RA & Quality | SSale | −3.35K | $1.65 | −$5.52K | −3.0%107.7K after | 2 lots |
| Aug 18, 2023 (view filing) | Aug 16 | 2 days | Joshi ManherEVP, Chief Medical Officer | SSale | −6.97K | $1.65 | −$11.5K | −3.7%183.6K after | 2 lots |