Atara Biotherapeutics Ownership | Who Owns Atara Biotherapeutics?
Atara Biotherapeutics Ownership Summary
Atara Biotherapeutics is owned by 14.79% institutional investors, 21.39% insiders, and 63.82% retail investors. Redmile group is the largest institutional shareholder, holding 3.62% of ATRA shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.05% of its assets in Atara Biotherapeutics shares.
ATRA Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Atara Biotherapeutics | 14.79% | 21.39% | 63.82% |
| Sector | Healthcare Stocks | 488.17% | 11.08% | -399.26% |
| Industry | Biotech Stocks | 306.59% | 11.10% | -217.69% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Redmile group | 441.70K | 3.62% | $3.41M |
| Vestal point capital, lp | 94.08K | 0.77% | $726.34K |
| Staley capital advisers | 75.00K | 0.61% | $579.00K |
| Blackrock funding, inc. /de | 70.85K | 0.58% | $546.95K |
| Acadian asset management | 65.16K | 0.53% | $502.00K |
| Marshall wace, llp | 42.35K | 0.35% | $326.98K |
| Mackenzie financial | 22.51K | 0.18% | $173.81K |
| Raymond james financial | 4.02K | 0.03% | $31.04K |
| Jones financial companies lllp | 703.00 | 0.01% | $5.60K |
| Birchview capital, lp | - | - | - |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Redmile group | 441.70K | 0.36% | $3.41M |
| Vestal point capital, lp | 94.08K | 0.04% | $726.34K |
| Staley capital advisers | 75.00K | 0.02% | $579.00K |
| Acadian asset management | 65.16K | 0.00% | $502.00K |
| Marshall wace, llp | 42.35K | 0.00% | $326.98K |
| Mackenzie financial | 22.51K | 0.00% | $173.81K |
| Birchview capital, lp | - | - | - |
| Legal & general group | - | - | - |
| Geode capital management | - | - | - |
| Ecor1 capital | - | - | - |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Marshall wace, llp | 42.35K | 0.00% | 42.35K |
| Mackenzie financial | 22.51K | 0.00% | 22.51K |
| Blackrock funding, inc. /de | 70.85K | - | 10.05K |
| Raymond james financial | 4.02K | - | 4.02K |
| Vestal point capital, lp | 94.08K | 0.04% | - |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Ecor1 capital | - | - | -10.17M |
| Blackrock | - | - | -6.83M |
| Bank of america corp /de/ | - | - | -6.58M |
| Vanguard group | - | - | -5.01M |
| Price t rowe associates inc /md/ | - | - | -4.96M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Mackenzie financial | 22.51K | 0.00% | 22.51K | $173.81K |
| Raymond james financial | 4.02K | - | 4.02K | $31.04K |
Sold Out
| Holder | Change |
|---|---|
| Citigroup | -2.00 |
| Nelson, van denburg & campbell wealth management group | -23.00 |
| Eversource wealth advisors | -35.00 |
| Nisa investment advisors | -50.00 |
| Gamma investing | -56.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2025 | 32 | -8.57% | 1,803,950 | 19.18% | 14 | 7.48% | 11 | -8.33% | 6 | -53.85% |
| Mar 31, 2025 | 36 | -14.29% | 2,086,297 | -10.96% | 19 | 4.03% | 13 | -43.48% | 13 | 18.18% |
| Dec 31, 2024 | 2 | 100.00% | 63 | 80.00% | - | 360000.00% | 1 | - | - | - |
| Sep 30, 2024 | 1 | -80.00% | 35 | -99.98% | - | 2.78% | - | -100.00% | - | -100.00% |
| Jun 30, 2024 | 5 | -93.98% | 182,077 | -99.78% | - | 0.00% | 1 | -97.62% | 2 | -92.86% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 120.26K | 2.05% | - |
| Vanguard Total Stock Mkt Idx Inv | 117.69K | 1.69% | -2.57K |
| Vanguard Institutional Extnd Mkt Idx Tr | 49.27K | 0.71% | -17.18K |
| Fidelity Extended Market Index | 29.13K | 0.43% | -76.00 |
| Fidelity VIP Disciplined Small Cap Init | 16.24K | 0.24% | -1.00 |
| Bridgeway Ultra-Small Company Market | 14.00K | 0.20% | - |
| Fidelity Enhanced Small Cap ETF | 10.45K | 0.18% | - |
| NT R2000 Value Index Fund - NL | 255.47K | 0.18% | - |
| NT R2000 Index Fund - NL | 9.83K | 0.17% | -1.01K |
| Fidelity Total Market Index | 10.59K | 0.16% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Aug 18, 2025 | Nguyen AnhCo | President and CEO | Sell | $18.82K |
| Aug 18, 2025 | Nguyen AnhCo | President and CEO | Sell | $14.88K |
| Aug 18, 2025 | Nguyen AnhCo | President and CEO | Sell | $661.94 |
| Aug 18, 2025 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | $638.50 |
| Aug 18, 2025 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | $998.72 |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q3 | 2 | 6 |
| 2025 Q2 | - | 2 |
| 2025 Q1 | - | 3 |
| 2024 Q4 | - | 3 |
| 2024 Q3 | - | 12 |
ATRA Ownership FAQ
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