Prothena Corp
PRTA
192 hedge funds and large institutions have $2.91B invested in Prothena Corp in 2021 Q3 according to their latest regulatory filings, with 50 funds opening new positions, 57 increasing their positions, 49 reducing their positions, and 13 closing their positions.
285% more first-time investments, than exits
New positions opened: 50 | Existing positions closed: 13
59% more call options, than puts
Call options by funds: $18.1M | Put options by funds: $11.4M
40% more capital invested
Capital invested by funds: $2.08B → $2.91B (+$837M)
23% more funds holding
Funds holding: 156 → 192 (+36)
16% more repeat investments, than reductions
Existing positions increased: 57 | Existing positions reduced: 49
0% more funds holding in top 10
Funds holding in top 10: 5 → 5 (0)
0.65% less ownership
Funds ownership: 91.5% → 90.85% (-0.65%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BC
Boxer Capital
San Diego,
California
|
+$18.6M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$14.9M |
| 3 |
Vanguard Group
Malvern,
Pennsylvania
|
+$11.6M |
| 4 |
State Street
Boston,
Massachusetts
|
+$11M |
| 5 |
SG Americas Securities
New York
|
+$6.59M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
FLAM
First Light Asset Management
Edina,
Minnesota
|
-$29.7M |
| 2 |
RG
Redmile Group
San Francisco,
California
|
-$19.5M |
| 3 |
RSCM
Rock Springs Capital Management
Baltimore,
Maryland
|
-$14.9M |
| 4 |
APM
Avidity Partners Management
Dallas,
Texas
|
-$9.36M |
| 5 |
Fidelity Investments
Boston,
Massachusetts
|
-$8M |
PRTA Hedge Fund Activity: Q3 2021 in Review
192 of the 5,712 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q3 2021, worth a combined $2.91B — up 40% from $2.08B a quarter earlier.
Buyers outnumbered sellers: 50 funds opened new PRTA positions and 13 closed out — a net gain of 37 holders — while 57 added to existing stakes and 49 trimmed.
The largest buyer was Boxer Capital, opening a new position worth an estimated $18.6M. The largest seller was First Light Asset Management, cutting an estimated $29.7M.
- 192 institutional investors held Prothena Corp (PRTA) as of Q3 2021, up from 156 in Q2 2021.
- Funds reported $2.91B of Prothena Corp stock for Q3 2021, up 40% quarter-over-quarter.
- 50 funds opened new Prothena Corp positions in Q3 2021 and 13 closed out, a net change of +37 holders.
- The largest Prothena Corp buyer in Q3 2021 was Boxer Capital, an estimated $18.6M added.
- The largest Prothena Corp seller in Q3 2021 was First Light Asset Management, an estimated $29.7M sold.
Based on aggregated 13F filings for Q3 2021.