Prothena Corp
PRTA
187 hedge funds and large institutions have $1.95B invested in Prothena Corp in 2023 Q4 according to their latest regulatory filings, with 41 funds opening new positions, 68 increasing their positions, 46 reducing their positions, and 38 closing their positions.
48% more repeat investments, than reductions
Existing positions increased: 68 | Existing positions reduced: 46
31% more call options, than puts
Call options by funds: $81.9M | Put options by funds: $62.6M
8% more first-time investments, than exits
New positions opened: 41 | Existing positions closed: 38
0.9% more ownership
Funds ownership: 98.94% → 99.84% (+0.9%)
1% more funds holding
Funds holding: 186 → 187 (+1)
24% less capital invested
Capital invested by funds: $2.56B → $1.95B (-$608M)
40% less funds holding in top 10
Funds holding in top 10: 5 → 3 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
State Street
Boston,
Massachusetts
|
+$25M |
| 2 |
AG
Artal Group
Luxembourg
|
+$19.3M |
| 3 |
Wellington Management Group
Boston,
Massachusetts
|
+$17.4M |
| 4 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$16.1M |
| 5 |
AC
Armistice Capital
New York
|
+$10.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$41.2M |
| 2 |
PHS
PFM Health Sciences
San Francisco,
California
|
-$24.9M |
| 3 |
APM
Avidity Partners Management
Dallas,
Texas
|
-$18.4M |
| 4 |
FLAM
First Light Asset Management
Edina,
Minnesota
|
-$15.6M |
| 5 |
Point72 Asset Management
Stamford,
Connecticut
|
-$10.6M |
PRTA Hedge Fund Activity: Q4 2023 in Review
187 of the 6,869 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q4 2023, worth a combined $1.95B — down 24% from $2.56B a quarter earlier.
Buyers outnumbered sellers: 41 funds opened new PRTA positions and 38 closed out — a net gain of 3 holders — while 68 added to existing stakes and 46 trimmed.
The largest buyer was State Street, adding an estimated $25M. The largest seller was T. Rowe Price Investment Management, exiting entirely with an estimated $41.2M sold.
- 187 institutional investors held Prothena Corp (PRTA) as of Q4 2023, up from 186 in Q3 2023.
- Funds reported $1.95B of Prothena Corp stock for Q4 2023, down 24% quarter-over-quarter.
- 41 funds opened new Prothena Corp positions in Q4 2023 and 38 closed out, a net change of +3 holders.
- The largest Prothena Corp buyer in Q4 2023 was State Street, an estimated $25M added.
- The largest Prothena Corp seller in Q4 2023 was T. Rowe Price Investment Management, an estimated $41.2M sold.
Based on aggregated 13F filings for Q4 2023.