Prothena Corp
PRTA
191 hedge funds and large institutions have $2.51B invested in Prothena Corp in 2023 Q1 according to their latest regulatory filings, with 27 funds opening new positions, 70 increasing their positions, 56 reducing their positions, and 32 closing their positions.
116% more call options, than puts
Call options by funds: $7.72M | Put options by funds: $3.57M
25% more repeat investments, than reductions
Existing positions increased: 70 | Existing positions reduced: 56
2.77% more ownership
Funds ownership: 95.67% → 98.44% (+2.8%)
5% less funds holding
Funds holding: 201 → 191 (-10)
13% less funds holding in top 10
Funds holding in top 10: 8 → 7 (-1)
13% less capital invested
Capital invested by funds: $2.9B → $2.51B (-$383M)
16% less first-time investments, than exits
New positions opened: 27 | Existing positions closed: 32
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$149M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
+$26.5M |
| 3 |
Bank of America
Charlotte,
North Carolina
|
+$23.4M |
| 4 |
Janus Henderson Group
London,
United Kingdom
|
+$8.66M |
| 5 |
Two Sigma Investments
New York
|
+$8.56M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
APM
Avidity Partners Management
Dallas,
Texas
|
-$99.6M |
| 2 |
SCM
Suvretta Capital Management
New York
|
-$12.4M |
| 3 |
WP
Woodline Partners
San Francisco,
California
|
-$7.45M |
| 4 |
MRCP
Maple Rock Capital Partners
Toronto,
Ontario, Canada
|
-$5.59M |
| 5 |
PHS
PFM Health Sciences
San Francisco,
California
|
-$5.33M |
PRTA Hedge Fund Activity: Q1 2023 in Review
191 of the 6,275 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q1 2023, worth a combined $2.51B — down 13% from $2.9B a quarter earlier.
Sellers outnumbered buyers: 32 funds closed out of PRTA and 27 opened new positions — a net loss of 5 holders — while 56 trimmed existing stakes and 70 added.
The largest buyer was Fidelity Investments, adding an estimated $149M. The largest seller was Avidity Partners Management, cutting an estimated $99.6M.
- 191 institutional investors held Prothena Corp (PRTA) as of Q1 2023, down from 201 in Q4 2022.
- Funds reported $2.51B of Prothena Corp stock for Q1 2023, down 13% quarter-over-quarter.
- 27 funds opened new Prothena Corp positions in Q1 2023 and 32 closed out, a net change of -5 holders.
- The largest Prothena Corp buyer in Q1 2023 was Fidelity Investments, an estimated $149M added.
- The largest Prothena Corp seller in Q1 2023 was Avidity Partners Management, an estimated $99.6M sold.
Based on aggregated 13F filings for Q1 2023.