Atara Biotherapeutics
ATRA
ATRA
34 hedge funds and large institutions have $12.1M invested in Atara Biotherapeutics in 2026 Q1 according to their latest regulatory filings, with 8 funds opening new positions, 10 increasing their positions, 3 reducing their positions, and 14 closing their positions.
New
Increased
Maintained
Reduced
Closed
more repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
more ownership
Funds ownership: →
less funds holding
Funds holding: →
less first-time investments, than exits
New positions opened: | Existing positions closed:
67% less capital invested
Capital invested by funds: $37.1M → $12.1M (-$24.9M)
Holders
34
Holding in Top 10
–
Calls
$1K
Puts
–
Top Buyers
| 1 | +$4.27M | |
| 2 | +$1.56M | |
| 3 | +$1.07M | |
| 4 |
Acadian Asset Management
Boston,
Massachusetts
|
+$469K |
| 5 |
UBS Group
Zurich,
Switzerland
|
+$297K |
Top Sellers
| 1 | -$2.89M | |
| 2 | -$2.69M | |
| 3 | -$1.4M | |
| 4 |
Renaissance Technologies
New York
|
-$543K |
| 5 |
Cambridge Investment Research Advisors
Fairfield,
Iowa
|
-$414K |
