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Prothena Corp
PRTA

164 hedge funds and large institutions have $856M invested in Prothena Corp in 2024 Q3 according to their latest regulatory filings, with 23 funds opening new positions, 51 increasing their positions, 45 reducing their positions, and 19 closing their positions.

New
Increased
Maintained
Reduced
Closed

46% more call options, than puts

Call options by funds: $3.01M | Put options by funds: $2.06M

21% more first-time investments, than exits

New positions opened: 23 | Existing positions closed: 19

13% more repeat investments, than reductions

Existing positions increased: 51 | Existing positions reduced: 45

3% more funds holding

Funds holding: 160 → 164 (+4)

0.29% more ownership

Funds ownership: 94.51% → 94.79% (+0.29%)

0% more funds holding in top 10

Funds holding in top 10: 3 → 3 (0)

18% less capital invested

Capital invested by funds: $1.05B → $856M (-$193M)

Holders
164
Holders Change
+4
Holders Change %
+2.5%
% of All Funds
2.35%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.04%
New
23
Increased
51
Reduced
45
Closed
19
Calls
$3.01M
Puts
$2.06M
Net Calls
+$950K
Net Calls Change
+$1.23M

Top Buyers

Rank Fund Capital Flow
1
Wellington Management Group
Wellington Management Group
Massachusetts
+$11.6M
2
UBS AM
UBS AM
Illinois
+$10.4M
3
Federated Hermes
Federated Hermes
Pennsylvania
+$7.76M
4
PM
Prosight Management
Texas
+$4.23M
5
BlackRock
BlackRock
New York
+$3.68M

Top Sellers

Rank Fund Capital Flow
1
Janus Henderson Group
Janus Henderson Group
United Kingdom
-$21.7M
2
AG
Artal Group
Luxembourg
-$20.7M
3
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
-$8.92M
4
State Street
State Street
Massachusetts
-$5.54M
5
SFM
Systematic Financial Management
New Jersey
-$3.99M
Name Holding Trade Value Shares
Change 		Change in
Stake
Citadel Advisors
26
Citadel Advisors
Florida
$3.98M -$2.48M -115,470 -33%
BC
27
Birchview Capital
Vermont
$3.51M +$129K +6,000 +3%
JP Morgan Chase
28
JP Morgan Chase
New York
$3.35M -$2.06M -95,979 -32%
Renaissance Technologies
29
Renaissance Technologies
New York
$3.06M -$3.15M -146,700 -45%
N
30
Nuveen
North Carolina
$2.54M -$13.5K -627 -0.4%
DTC
31
Deep Track Capital
Connecticut
$2.34M +$3.01M +140,000 New
Bank of New York Mellon
32
Bank of New York Mellon
New York
$2.19M -$745K -34,637 -21%
Connor, Clark & Lunn Investment Management (CC&L)
33
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$2.05M +$208K +9,666 +9%
Axa
34
Axa
France
$2.02M +$774 +36 +0%
TD Asset Management
35
TD Asset Management
Ontario, Canada
$2.02M – – –
Millennium Management
36
Millennium Management
New York
$1.88M +$1.75M +81,246 +260%
PP
37
PDT Partners
New York
$1.85M +$171K +7,946 +8%
DA
38
DCF Advisers
Connecticut
$1.8M – – –
Jane Street
39
Jane Street
New York
$1.6M -$559K -26,021 -21%
Barclays
40
Barclays
United Kingdom
$1.59M +$1.07M +49,916 +110%
Manulife (Manufacturers Life Insurance)
41
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$1.44M +$68K +3,163 +4%
Bank of America
42
Bank of America
North Carolina
$1.37M -$791K -36,801 -31%
AG
43
Algert Global
California
$1.22M -$90.9K -4,230 -5%
Swiss National Bank
44
Swiss National Bank
Switzerland
$1.15M – – –
Wells Fargo
45
Wells Fargo
California
$1.11M +$118K +5,488 +9%
RhumbLine Advisers
46
RhumbLine Advisers
Massachusetts
$1.1M -$82K -3,816 -5%
UBS Group
47
UBS Group
Switzerland
$1.05M +$381K +17,738 +40%
SSA
48
Schonfeld Strategic Advisors
New York
$1.04M +$1.34M +62,272 New
Rafferty Asset Management
49
Rafferty Asset Management
New York
$1.04M -$748K -34,789 -36%
Norges Bank
50
Norges Bank
Norway
$961K – – –
1
2
3 4 5

PRTA Hedge Fund Activity: Q3 2024 in Review

164 of the 6,964 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q3 2024, worth a combined $856M — down 18% from $1.05B a quarter earlier.

Buyers outnumbered sellers: 23 funds opened new PRTA positions and 19 closed out — a net gain of 4 holders — while 51 added to existing stakes and 45 trimmed.

The largest buyer was Wellington Management Group, adding an estimated $11.6M. The largest seller was Janus Henderson Group, cutting an estimated $21.7M.

  • 164 institutional investors held Prothena Corp (PRTA) as of Q3 2024, up from 160 in Q2 2024.
  • Funds reported $856M of Prothena Corp stock for Q3 2024, down 18% quarter-over-quarter.
  • 23 funds opened new Prothena Corp positions in Q3 2024 and 19 closed out, a net change of +4 holders.
  • The largest Prothena Corp buyer in Q3 2024 was Wellington Management Group, an estimated $11.6M added.
  • The largest Prothena Corp seller in Q3 2024 was Janus Henderson Group, an estimated $21.7M sold.

Based on aggregated 13F filings for Q3 2024.