Atara Biotherapeutics, Inc. ATRA
We take great care to ensure that the data presented and summarized in this overview for Atara Biotherapeutics, Inc. is accurate and up-to-date, based on a comprehensive analysis of 13F filing forms for institutional ownership and form 4 filings for insider transactions. Please note that this data may differ from other sources and should not be relied upon as the sole basis for investment decisions.
Top Institutions Holding ATRA
View all-
Kpcb Xv Associates, LLC1.88MShares$25.8 Million19.79% of portfolio
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Antipodean Advisors LLC New York, NY1MShares$13.8 Million8.12% of portfolio
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American Portfolios Advisors Holbrook, NY4.5KShares$61,9200.0% of portfolio
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Wipfli Financial Advisors Llc,3.08KShares$42,3670.0% of portfolio
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Act Capital Management, LLC Wayne, PA900Shares$12,3840.0% of portfolio
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Alexis Investment Partners, LLC Montgomery, TX15Shares$2060.0% of portfolio
Latest Institutional Activity in ATRA
Top Purchases
Top Sells
About ATRA
Atara Biotherapeutics, Inc., an off-the-shelf T-cell immunotherapy company, develops treatments for patients with cancer, autoimmune, and viral diseases in the United States. It is developing tabelecleucel, a T-cell immunotherapy that is Phase 3 clinical trials for the treatment of epstein-barr virus (EBV) driven post-transplant lymphoproliferative disease, as well as hematologic and solid tumors, including nasopharyngeal carcinoma. The company is also developing next-generation CAR T immunotherapies for patients with hematologic malignancies and solid tumors, including ATA2271 and ATA3271 for mesothelin; and ATA2431 and ATA3219 for B-cell malignancies, as well as ATA188 for the treatment of multiple sclerosis. In addition, it develops ATA368 program for patients with human papillomavirus associated cancers. Atara Biotherapeutics, Inc. has a license agreement with Memorial Sloan Kettering Cancer Center; license, and research and development collaboration agreement with QIMR Berghofer Medical Research Institute; and strategic collaboration with H. Lee Moffitt Cancer Center, as well as Bayer AG for mesothelin-targeted CAR T-cell therapies for solid tumors. The company was incorporated in 2012 and is headquartered in South San Francisco, California.
Insider Transactions at ATRA
Insider Transaction List
View all| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Nov 28
2025
|
Panacea Innovation LTD |
SELL
Payment of exercise price or tax liability
|
Indirect |
1
-0.0%
|
$14
$14.03 P/Share
|
|
Nov 28
2025
|
Panacea Innovation LTD |
BUY
Exercise of conversion of derivative security
|
Indirect |
48,737
+50.0%
|
-
|
|
Nov 17
2025
|
Yanina Grant Huerta Chief Accounting Officer |
SELL
Open market or private sale
|
Direct |
1,804
-1.71%
|
$23,452
$13.19 P/Share
|
|
Nov 17
2025
|
Anh Co Nguyen President and CEO |
SELL
Open market or private sale
|
Direct |
2,915
-2.15%
|
$37,895
$13.19 P/Share
|
|
Aug 18
2025
|
Anh Co Nguyen President and CEO |
SELL
Open market or private sale
|
Direct |
2,958
-1.41%
|
$32,538
$11.62 P/Share
|
|
Aug 18
2025
|
Yanina Grant Huerta Chief Accounting Officer |
SELL
Open market or private sale
|
Direct |
1,809
-1.63%
|
$19,899
$11.61 P/Share
|
|
Aug 15
2025
|
Panacea Innovation LTD |
BUY
Open market or private purchase
|
Indirect |
55,000
+3.77%
|
$660,000
$12.19 P/Share
|
|
Jul 17
2025
|
Panacea Innovation LTD |
BUY
Open market or private purchase
|
Indirect |
19,335
+1.41%
|
$174,015
$9.64 P/Share
|
|
Jun 10
2025
|
William K Heiden |
BUY
Grant, award, or other acquisition
|
Direct |
7,828
+26.08%
|
-
|
|
Jun 10
2025
|
Ameet Mallik |
BUY
Grant, award, or other acquisition
|
Direct |
7,828
+31.62%
|
-
|
|
Jun 10
2025
|
Maria Grazia Roncarolo |
BUY
Grant, award, or other acquisition
|
Direct |
7,828
+31.07%
|
-
|
|
Jun 10
2025
|
Pascal Touchon |
BUY
Grant, award, or other acquisition
|
Direct |
7,828
+9.13%
|
-
|
|
Jun 10
2025
|
Matthew K Fust |
BUY
Grant, award, or other acquisition
|
Direct |
7,828
+30.09%
|
-
|
|
Jun 10
2025
|
Carol Giltner Gallagher |
BUY
Grant, award, or other acquisition
|
Direct |
7,828
+19.17%
|
-
|
|
May 16
2025
|
Anh Co Nguyen President and CEO |
SELL
Open market or private sale
|
Direct |
3,276
-4.42%
|
$19,656
$6.76 P/Share
|
|
May 16
2025
|
Yanina Grant Huerta Chief Accounting Officer |
SELL
Open market or private sale
|
Direct |
2,218
-5.65%
|
$13,308
$6.76 P/Share
|
|
May 16
2025
|
Adiumentum Capital Fund I LP Director |
BUY
Grant, award, or other acquisition
|
Direct |
75,572
+5.88%
|
$453,432
$6.61 P/Share
|
|
Mar 03
2025
|
Jill Henrich EVP, Chief Regulatory Officer |
SELL
Open market or private sale
|
Direct |
1,059
-5.37%
|
$7,413
$7.0 P/Share
|
|
Mar 03
2025
|
Eric J Hyllengren |
SELL
Open market or private sale
|
Direct |
1,211
-2.11%
|
$8,477
$7.0 P/Share
|
|
Mar 03
2025
|
Anh Co Nguyen President and CEO |
SELL
Open market or private sale
|
Direct |
3,331
-4.3%
|
$23,317
$7.0 P/Share
|
Last 12 Months Summary
| Grant, award, or other acquisition | 157K shares |
|---|---|
| Exercise of conversion of derivative security | 48.7K shares |
| Open market or private purchase | 74.3K shares |
| Open market or private sale | 20.6K shares |
|---|---|
| Payment of exercise price or tax liability | 1 shares |