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NASDAQ: ATRA
Atara Biotherapeutics Inc Stock Ownership - Who owns Atara Biotherapeutics?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Atara Biotherapeutics Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Yanina GranthuertaChief Accounting Officer2026-05-182,414$9.13
$22.04kSell
Anhco NguyenPresident and CEO2026-05-185,241$9.13
$47.85kSell
Ecor1 Capital LLC10% Owner2026-05-07507,407$9.35
$4.74MBuy
Panacea Innovation Ltd10% Owner2026-05-07313,446$10.10
$3.17MSell
Panacea Innovation Ltd10% Owner2026-03-175$5.23
$26.15Sell
Yanina GranthuertaChief Accounting Officer2026-03-021,603$5.08
$8.14kSell
Anhco NguyenPresident and CEO2026-03-02198$5.08
$1.01kSell
Anhco NguyenPresident and CEO2026-03-0258$5.08
$294.64Sell
Anhco NguyenPresident and CEO2026-03-021,298$5.09
$6.60kSell
Yanina GranthuertaChief Accounting Officer2026-03-02377$5.08
$1.92kSell

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Net Insider Buy/Sell (L12M) Ownership

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ATRA Shareholders

What type of owners hold Atara Biotherapeutics Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Panacea Innovation Ltd29.41%2,649,559$30.87MInsider
Domain Partners VIII LP23.77%2,141,542$24.95MInsider
Gregory Austin Ciongoli13.56%1,221,395$14.23MInsider
Adiumentum Capital Fund I LP13.42%1,209,395$14.09MInsider
Ecor1 Capital LLC11.59%1,044,593$12.17MInsider
Joel S. Marcus9.99%899,855$10.48MInsider
Adage Capital Partners GP LLC7.77%700,000$8.16MInstitution
Isaac E. Ciechanover6.91%622,930$7.26MInsider
Eric Dobmeier6.25%563,325$6.56MInsider
Redmile Group LLC4.90%441,701$5.15MInsider

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ATRA vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
ATRA15.61%84.39%Net BuyingNet Buying
CGTX23.93%30.49%Net SellingNet Buying
VRCA14.80%85.20%Net Buying
CBUS28.69%64.69%Net Buying
ONCY3.23%1.99%Net Buying
View Top Biotech Stocks

Atara Biotherapeutics Stock Ownership FAQ

Who owns Atara Biotherapeutics?

Atara Biotherapeutics (NASDAQ: ATRA) is owned by 28.46% institutional shareholders, 153.87% Atara Biotherapeutics insiders, and 0.00% retail investors. Panacea Innovation Ltd is the largest individual Atara Biotherapeutics shareholder, owning 2.65M shares representing 29.41% of the company. Panacea Innovation Ltd's Atara Biotherapeutics shares are currently valued at $30.87M.

If you're new to stock investing, here's how to buy Atara Biotherapeutics stock.
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