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Prothena Corp
PRTA

170 hedge funds and large institutions have $741M invested in Prothena Corp in 2024 Q4 according to their latest regulatory filings, with 34 funds opening new positions, 63 increasing their positions, 39 reducing their positions, and 28 closing their positions.

New
Increased
Maintained
Reduced
Closed

104% more call options, than puts

Call options by funds: $8.78M | Put options by funds: $4.31M

62% more repeat investments, than reductions

Existing positions increased: 63 | Existing positions reduced: 39

21% more first-time investments, than exits

New positions opened: 34 | Existing positions closed: 28

4.67% more ownership

Funds ownership: 94.79% → 99.46% (+4.7%)

4% more funds holding

Funds holding: 164 → 170 (+6)

0% more funds holding in top 10

Funds holding in top 10: 3 → 3 (0)

13% less capital invested

Capital invested by funds: $856M → $741M (-$115M)

Holders
170
Holders Change
+6
Holders Change %
+3.66%
% of All Funds
2.24%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.04%
New
34
Increased
63
Reduced
39
Closed
28
Calls
$8.78M
Puts
$4.31M
Net Calls
+$4.48M
Net Calls Change
+$3.53M

Top Buyers

1
Wellington Management Group
Wellington Management Group
Massachusetts
+$15M
2
AC
Armistice Capital
New York
+$9.24M
3
Federated Hermes
Federated Hermes
Pennsylvania
+$5.38M
4
UBS Group
UBS Group
Switzerland
+$4.87M
5
FC
Finepoint Capital
Massachusetts
+$3.53M

Top Sellers

1
GIM
Granahan Investment Management
Massachusetts
-$5.23M
2
Citadel Advisors
Citadel Advisors
Florida
-$3.09M
3
DTC
Deep Track Capital
Connecticut
-$2.34M
4
UBS AM
UBS AM
Illinois
-$2.29M
5
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
-$2.16M
Name Holding Trade Value Shares
Change 		Change in
Stake
BC
26
Birchview Capital
Vermont
$4.22M +$1.5M +95,000 +45%
Renaissance Technologies
27
Renaissance Technologies
New York
$2.8M +$301K +19,100 +10%
N
28
Nuveen
North Carolina
$2.11M +$6.01K +381 +0.3%
Bank of New York Mellon
29
Bank of New York Mellon
New York
$2.08M +$307K +19,452 +15%
PP
30
PDT Partners
New York
$1.76M +$261K +16,549 +15%
Millennium Management
31
Millennium Management
New York
$1.7M +$165K +10,467 +9%
Axa
32
Axa
France
$1.67M -$1.97K -125 -0.1%
Bank of America
33
Bank of America
North Carolina
$1.65M +$583K +36,944 +45%
Barclays
34
Barclays
United Kingdom
$1.46M +$160K +10,116 +11%
DA
35
DCF Advisers
Connecticut
$1.43M -$63.1K -4,000 -4%
PA
36
Pinnacle Associates
New York
$1.43M -$358K -22,666 -18%
BNP Paribas Financial Markets
37
BNP Paribas Financial Markets
France
$1.35M +$655K +41,541 +74%
Deutsche Bank
38
Deutsche Bank
Germany
$1.33M +$1M +63,512 +196%
Connor, Clark & Lunn Investment Management (CC&L)
39
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$1.27M -$484K -30,652 -25%
SFI
40
Susquehanna Fundamental Investments
Pennsylvania
$1.12M +$1.27M +80,677 New
Rafferty Asset Management
41
Rafferty Asset Management
New York
$1.08M +$244K +15,442 +25%
Man Group
42
Man Group
United Kingdom
$1.07M +$581K +36,824 +91%
Manulife (Manufacturers Life Insurance)
43
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$972K -$251K -15,887 -18%
DWAM
44
Duncan Williams Asset Management
Tennessee
$958K +$323K +20,450 +42%
Swiss National Bank
45
Swiss National Bank
Switzerland
$951K – – –
Citigroup
46
Citigroup
New York
$948K +$574K +36,359 +113%
RhumbLine Advisers
47
RhumbLine Advisers
Massachusetts
$930K +$18.5K +1,175 +2%
TD Asset Management
48
TD Asset Management
Ontario, Canada
$896K -$568K -36,000 -36%
BFM
49
Boothbay Fund Management
New York
$859K +$978K +62,002 New
Norges Bank
50
Norges Bank
Norway
$796K – – –
1
2
3 4 5

PRTA Hedge Fund Activity: Q4 2024 in Review

170 of the 7,592 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q4 2024, worth a combined $741M — down 13% from $856M a quarter earlier.

Buyers outnumbered sellers: 34 funds opened new PRTA positions and 28 closed out — a net gain of 6 holders — while 63 added to existing stakes and 39 trimmed.

The largest buyer was Wellington Management Group, adding an estimated $15M. The largest seller was Granahan Investment Management, exiting entirely with an estimated $5.23M sold.

  • 170 institutional investors held Prothena Corp (PRTA) as of Q4 2024, up from 164 in Q3 2024.
  • Funds reported $741M of Prothena Corp stock for Q4 2024, down 13% quarter-over-quarter.
  • 34 funds opened new Prothena Corp positions in Q4 2024 and 28 closed out, a net change of +6 holders.
  • The largest Prothena Corp buyer in Q4 2024 was Wellington Management Group, an estimated $15M added.
  • The largest Prothena Corp seller in Q4 2024 was Granahan Investment Management, an estimated $5.23M sold.

Based on aggregated 13F filings for Q4 2024.