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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
Yanina GranthuertaChief Accounting Officer2026-03-02377$5.08
$1.92kSell
Yanina GranthuertaChief Accounting Officer2026-03-02100$5.08
$508.30Sell
Yanina GranthuertaChief Accounting Officer2026-03-0224$5.08
$121.85Sell
Anhco NguyenPresident and CEO2026-03-02198$5.08
$1.01kSell

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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 Ltd26.40%2,649,559$21.43MInsider
Domain Partners VIII LP21.33%2,141,542$17.33MInsider
Gregory Austin Ciongoli12.17%1,221,395$9.88MInsider
Adiumentum Capital Fund I LP12.05%1,209,395$9.78MInsider
Redmile Group LLC10.75%1,078,553$8.73MInsider
Ecor1 Capital LLC10.41%1,044,593$8.45MInsider
Joel S. Marcus8.96%899,855$7.28MInsider
Isaac E. Ciechanover6.21%622,930$5.04MInsider
Eric Dobmeier5.61%563,325$4.56MInsider
Jakob Dupont2.90%290,794$2.35MInsider

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ATRA vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
ATRA0.03%99.97%Net BuyingNet Selling
ELTX0.01%43.40%Net Buying
FRMM0.02%99.98%Net SellingNet Selling
OKYO0.00%100.00%Net BuyingNet Buying
NRXS0.02%30.90%Net Buying
View Top Biotech Stocks

Atara Biotherapeutics Stock Ownership FAQ

Who owns Atara Biotherapeutics?

Atara Biotherapeutics (NASDAQ: ATRA) is owned by 0.04% institutional shareholders, 144.46% Atara Biotherapeutics insiders, and 0.00% retail investors. Panacea Innovation Ltd is the largest individual Atara Biotherapeutics shareholder, owning 2.65M shares representing 26.40% of the company. Panacea Innovation Ltd's Atara Biotherapeutics shares are currently valued at $21.43M.

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