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Atara Biotherapeutics
ATRA
ATRA
33 hedge funds and large institutions have $12.1M invested in Atara Biotherapeutics in 2026 Q1 according to their latest regulatory filings, with 7 funds opening new positions, 10 increasing their positions, 3 reducing their positions, and 14 closing their positions.
New
Increased
Maintained
Reduced
Closed
233% more repeat investments, than reductions
Existing positions increased: 10 | Existing positions reduced: 3
2.93% more ownership
Funds ownership: 28.43% → 31.36% (+2.9%)
20% less funds holding
Funds holding: 41 → 33 (-8)
50% less first-time investments, than exits
New positions opened: 7 | Existing positions closed: 14
67% less capital invested
Capital invested by funds: $37.1M → $12.1M (-$24.9M)
Holders
33
Holders Change
-8
Holders Change %
-19.51%
% of All Funds
0.41%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
7
Increased
10
Reduced
3
Closed
14
Calls
$1K
Puts
–
Net Calls
+$1K
Net Calls Change
-$2K
