Prothena Corp
PRTA
196 hedge funds and large institutions have $2.12B invested in Prothena Corp in 2021 Q4 according to their latest regulatory filings, with 41 funds opening new positions, 72 increasing their positions, 37 reducing their positions, and 36 closing their positions.
152% more call options, than puts
Call options by funds: $12.3M | Put options by funds: $4.86M
95% more repeat investments, than reductions
Existing positions increased: 72 | Existing positions reduced: 37
14% more first-time investments, than exits
New positions opened: 41 | Existing positions closed: 36
2% more funds holding
Funds holding: 192 → 196 (+4)
1.23% more ownership
Funds ownership: 90.85% → 92.07% (+1.2%)
20% less funds holding in top 10
Funds holding in top 10: 5 → 4 (-1)
27% less capital invested
Capital invested by funds: $2.91B → $2.12B (-$799M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
State Street
Boston,
Massachusetts
|
+$31.5M |
| 2 |
JP Morgan Chase
New York
|
+$11.1M |
| 3 |
FLAM
First Light Asset Management
Edina,
Minnesota
|
+$9.62M |
| 4 |
ECM
ExodusPoint Capital Management
New York
|
+$9.03M |
| 5 |
Marshall Wace
London,
United Kingdom
|
+$8.08M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
ACM
Atika Capital Management
New York
|
-$16M |
| 2 |
Invesco
Atlanta,
Georgia
|
-$10.5M |
| 3 |
RG
Redmile Group
San Francisco,
California
|
-$7.53M |
| 4 |
Adage Capital Partners
Boston,
Massachusetts
|
-$7.12M |
| 5 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$6.31M |
PRTA Hedge Fund Activity: Q4 2021 in Review
196 of the 6,498 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q4 2021, worth a combined $2.12B — down 27% from $2.91B a quarter earlier.
Buyers outnumbered sellers: 41 funds opened new PRTA positions and 36 closed out — a net gain of 5 holders — while 72 added to existing stakes and 37 trimmed.
The largest buyer was State Street, adding an estimated $31.5M. The largest seller was Atika Capital Management, exiting entirely with an estimated $16M sold.
- 196 institutional investors held Prothena Corp (PRTA) as of Q4 2021, up from 192 in Q3 2021.
- Funds reported $2.12B of Prothena Corp stock for Q4 2021, down 27% quarter-over-quarter.
- 41 funds opened new Prothena Corp positions in Q4 2021 and 36 closed out, a net change of +5 holders.
- The largest Prothena Corp buyer in Q4 2021 was State Street, an estimated $31.5M added.
- The largest Prothena Corp seller in Q4 2021 was Atika Capital Management, an estimated $16M sold.
Based on aggregated 13F filings for Q4 2021.