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Atara Biotherapeutics (ATRA) Institutional Ownership

Atara Biotherapeutics logo
$9.71 -0.20 (-2.02%)
As of 12:18 PM Eastern
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Institutional Ownership Changes (13F Filings) for Atara Biotherapeutics (NASDAQ:ATRA)

Current
Institutional Ownership
Percentage
70.90%
Number of
Institutional Buyers
(last 12 months)
10
Total
Institutional Inflows
(last 12 months)
$3.59M
Number of
Institutional Sellers
(last 12 months)
5
Total
Institutional Outflows
(last 12 months)
$2.86M
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ATRA Institutional Buying and Selling by Quarter

Atara Biotherapeutics Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/18/2026 EcoR1 Capital LLC99,593$471K0.0%-82.6%1.105%
2/18/2026 Mackenzie Financial Corp58,668$1.05M0.0%-8.1%0.814%
2/18/2026 Quadrature Capital Ltd20,321$368K0.0%+22.8%0.282%
2/18/2026 Bridgeway Capital Management LLC32,691$591K0.0%+133.5%0.453%
2/13/2026 Marshall Wace LLP148,632$2.69M0.0%+28.4%2.061%
2/13/2026 Walleye Capital LLC12,169$220K0.0%N/A0.169%
2/12/2026 Jane Street Group LLC13,990$253K0.0%-36.6%0.194%
2/12/2026 Renaissance Technologies LLC30,040$543K0.0%+58.6%0.417%
2/12/2026 Dimensional Fund Advisors LP10,028$181K0.0%N/A0.139%
2/11/2026 Globeflex Capital L P77,224$1.40M0.2%+399.6%1.071%
11/17/2025 Bank of America Corp DE5,845$84K0.0%-24.0%0.081%
11/13/2025 Mackenzie Financial Corp63,816$914K0.0%+183.5%0.909%
11/12/2025 Staley Capital Advisers Inc.50,000$716K0.0%-33.3%0.712%
11/7/2025 GSA Capital Partners LLP26,213$376K0.0%+33.8%0.373%
11/7/2025Vanguard Group Inc.203,438$2.92M0.0%+6.6%2.898%
8/15/2025 Bank of America Corp DE7,688$59K0.0%-95.9%0.109%
8/14/2025 Raymond James Financial Inc.4,021$31K0.0%N/A0.057%
8/13/2025 Marshall Wace LLP42,355$327K0.0%N/A0.711%
8/8/2025 Geode Capital Management LLC60,136$464K0.0%+2.5%1.009%
5/21/2025Acadian Asset Management LLC115,111$682K0.0%-7.5%1.931%
5/16/2025EcoR1 Capital LLC573,183$3.41M0.2%+7.7%9.616%
5/15/2025Vestal Point Capital LP94,085$559K0.0%-24.7%1.578%
5/12/2025Staley Capital Advisers Inc.80,000$475K0.0%+60.0%1.342%
2/17/2025Redmile Group LLC441,701$5.88M0.4%-2.3%7.668%
2/17/2025Point72 Asia Singapore Pte. Ltd.3,603$48K0.0%N/A0.063%
2/17/2025Millennium Management LLC10,133$135K0.0%-94.2%0.176%
2/17/2025Cubist Systematic Strategies LLC12,682$169K0.0%N/A0.220%
2/17/2025Citadel Advisors LLC267,353$3.56M0.0%+2.6%4.642%
2/17/2025Bank of America Corp DE205,170$2.73M0.0%+0.8%3.562%
2/14/2025Northern Trust Corp11,170$149K0.0%N/A0.194%
2/14/2025Birchview Capital LP22,000$293K0.2%N/A0.382%
2/13/2025Marshall Wace LLP24,958$332K0.0%N/A0.433%
2/12/2025Geode Capital Management LLC54,744$729K0.0%+17.2%0.950%
2/7/2025Staley Capital Advisers Inc.50,000$666K0.0%+25.0%0.868%
11/16/2024Geode Capital Management LLC46,720$380K0.0%+9.5%0.811%
11/15/2024State Street Corp22,353$182K0.0%+52.3%0.388%
11/15/2024Centiva Capital LP43,403$353K0.0%-69.1%0.754%
11/14/2024Vestal Point Capital LP124,677$1.01M0.1%+11.3%2.539%
11/13/2024FMR LLC25,061$204K0.0%+41.7%0.510%
9/16/2024Cubist Systematic Strategies LLC9,271$79K0.0%N/A0.189%
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9/16/2024Point72 Asia Singapore Pte. Ltd.6,292$53K0.0%N/A0.128%
8/15/2024AQR Capital Management LLC15,079$128K0.0%-99.4%0.313%
8/15/2024Point72 Asia Singapore Pte. Ltd.6,292$53K0.0%N/A0.131%
8/14/2024Cubist Systematic Strategies LLC9,271$79K0.0%N/A0.192%
8/9/2024Renaissance Technologies LLC46,064$392K0.0%-95.3%0.956%
8/6/2024Acadian Asset Management LLC119,370$1.01M0.0%-95.5%2.477%
5/16/2024Redmile Group LLC9,263,309$6.43M0.2%+1.7%7.693%
5/15/2024Price T Rowe Associates Inc. MD4,958,150$3.44M0.0%+8,916.3%4.117%
5/14/2024Delap Wealth Advisory LLC41,533$29K0.0%N/A0.034%
5/10/2024Acadian Asset Management LLC2,638,687$1.83M0.0%+49.5%2.191%
5/10/2024Vanguard Group Inc.5,012,938$3.48M0.0%-25.0%4.163%
5/1/2024BNP Paribas Financial Markets383,082$266K0.0%+29.3%0.318%
1/30/2024Vontobel Holding Ltd.80,000$41K0.0%N/A0.078%
1/8/2024Harbor Capital Advisors Inc.208,827$107K0.0%+368.0%0.205%
12/6/2023Citigroup Inc.453,102$671K0.0%-5.9%0.445%
11/22/2023Josh Arnold Investment Consultant LLC200,000$300K0.3%+17.6%0.196%
11/15/2023Redmile Group LLC6,280,813$9.30M0.4%+3.8%6.162%
11/14/2023683 Capital Management LLC1,200,000$1.78M0.1%+20.0%1.177%
11/14/2023Staley Capital Advisers Inc.1,000,000$1.48M0.1%+33.3%0.981%
11/13/2023Acadian Asset Management LLC534,393$789K0.0%-24.2%0.524%
11/9/2023Deutsche Bank AG388,384$575K0.0%-43.6%0.381%
11/3/2023Private Advisor Group LLC95,463$141K0.0%+53.0%0.094%
10/27/2023Hennion & Walsh Asset Management Inc.168,916$250K0.0%-5.7%0.167%
10/27/2023Allspring Global Investments Holdings LLC38,967$58K0.0%-41.3%0.039%
10/24/2023Pinnacle Associates Ltd.385,364$570K0.0%-2.6%0.381%
10/13/2023SG Americas Securities LLC38,743$57K0.0%N/A0.038%
9/21/2023Barclays PLC35,353$56K0.0%-91.2%0.035%
8/14/2023683 Capital Management LLC1,000,000$1.61M0.1%N/A0.989%
8/14/2023Graham Capital Management L.P.85,672$138K0.0%N/A0.085%
8/11/2023Baupost Group LLC MA9,773,616$15.74M0.3%+7.1%9.667%
8/11/2023B. Metzler seel. Sohn & Co. AG98,564$159K0.0%+100.0%0.097%
8/11/2023ExodusPoint Capital Management LP417,882$673K0.0%+52.8%0.427%
8/10/2023Private Advisor Group LLC62,400$100K0.0%N/A0.064%
8/8/2023Wasatch Advisors LP8,283,981$13.34M0.1%-0.8%8.456%
8/7/2023Acadian Asset Management LLC704,694$1.13M0.0%N/A0.719%
7/28/2023Vanguard Personalized Indexing Management LLC31,423$51K0.0%N/A0.032%
7/24/2023Allspring Global Investments Holdings LLC66,404$107K0.0%+47.2%0.068%
7/18/2023Allspring Global Investments Holdings LLC66,404$107K0.0%+47.2%0.068%
7/11/2023Harbor Capital Advisors Inc.50,076$81K0.0%N/A0.051%
5/12/2023Baupost Group LLC MA9,123,616$26.46M0.5%+12.3%9.442%
5/12/2023Profund Advisors LLC104,484$303K0.0%N/A0.108%
5/11/2023ExodusPoint Capital Management LP273,484$793K0.0%+346.5%0.283%
5/11/2023Citigroup Inc.911,219$2.64M0.0%-11.1%0.943%
5/11/2023E Fund Management Co. Ltd.32,062$93K0.0%+21.7%0.033%
5/5/2023Pinnacle Associates Ltd.399,316$1.16M0.0%+1.6%0.413%
5/4/2023Barclays PLC400,563$1.16M0.0%+39.4%0.415%
5/4/2023Mirae Asset Global Investments Co. Ltd.23,763$69K0.0%-38.7%0.025%
4/28/2023SG Americas Securities LLC34,707$101K0.0%+29.0%0.036%
4/20/2023Hennion & Walsh Asset Management Inc.269,146$781K0.0%-2.9%0.279%
4/14/2023Raymond James & Associates188,903$548K0.0%+4.0%0.195%
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3/23/2023MetLife Investment Management LLC36,073$118K0.0%-23.7%0.038%
2/16/2023Josh Arnold Investment Consultant LLC52,000$171K0.3%+73.3%0.054%
2/14/2023Alpine Global Management LLC35,475$116K0.0%N/A0.037%
2/10/2023M28 Capital Management LP439,300$1.44M1.4%N/A0.463%
2/10/2023Globeflex Capital L P25,783$85K0.0%N/A0.027%
2/9/2023Citigroup Inc.1,025,418$3.36M0.0%-20.5%1.081%
2/8/2023Swiss National Bank193,700$635K0.0%+3.9%0.204%
2/8/2023Oppenheimer & Co. Inc.27,350$90K0.0%-9.8%0.029%
2/7/2023Mitsubishi UFJ Kokusai Asset Management Co. Ltd.61,994$203K0.0%+26.7%0.065%
2/2/2023SG Americas Securities LLC26,915$88K0.0%-15.3%0.028%


ATRA Institutional Ownership - Frequently Asked Questions

During the previous two years, 28 institutional investors and hedge funds held shares of Atara Biotherapeutics. The most heavily invested institutionals were Redmile Group LLC ($5.88M), Citadel Advisors LLC ($3.56M), Vanguard Group Inc. ($2.92M), Marshall Wace LLP ($2.69M), Globeflex Capital L P ($1.40M), Mackenzie Financial Corp ($1.05M), and Staley Capital Advisers Inc. ($716K).Learn more on Atara Biotherapeutics' institutional investors.

70.90% of Atara Biotherapeutics' stock is owned by institutional investors. Learn more on ATRA's institutional investor holdings.

Of the 23 institutional investors that purchased Atara Biotherapeutics' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Marshall Wace LLP ($100.15K), Globeflex Capital L P ($61.77K), Mackenzie Financial Corp ($41.30K), EcoR1 Capital LLC ($41.05K), Staley Capital Advisers Inc. ($40K), Birchview Capital LP ($22K), and Cubist Systematic Strategies LLC ($21.95K).

Institutional investors have bought a total of 210,974 shares in the last 24 months. This purchase volume represents approximately $3.59M in transactions.

The following institutional investors have sold Atara Biotherapeutics stock in the last 24 months: EcoR1 Capital LLC ($473.59K), Staley Capital Advisers Inc. ($25K), Jane Street Group LLC ($8.07K), Mackenzie Financial Corp ($5.15K), and Bank of America Corp DE ($1.84K).

Institutional investors have sold a total of 513,651 shares in the last 24 months. This volume of shares sold represents approximately $2.86M in transactions.


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Institutional ownership data for NASDAQ:ATRA is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 5/18/2026. New 13F filings are added each quarter as they're published.
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