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Prothena Corp
PRTA

140 hedge funds and large institutions have $418M invested in Prothena Corp in 2020 Q4 according to their latest regulatory filings, with 25 funds opening new positions, 24 increasing their positions, 52 reducing their positions, and 24 closing their positions.

New
Increased
Maintained
Reduced
Closed

200% more funds holding in top 10

Funds holding in top 10: 1 → 3 (+2)

109% more call options, than puts

Call options by funds: $3.92M | Put options by funds: $1.88M

18% more capital invested

Capital invested by funds: $355M → $418M (+$63.4M)

4% more first-time investments, than exits

New positions opened: 25 | Existing positions closed: 24

0% more funds holding

Funds holding: 140 → 140 (0)

3.51% less ownership

Funds ownership: 90.74% → 87.23% (-3.5%)

54% less repeat investments, than reductions

Existing positions increased: 24 | Existing positions reduced: 52

Holders
140
Holders Change
–
Holders Change %
0%
% of All Funds
2.48%
Holding in Top 10
3
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+200%
% of All Funds
0.05%
New
25
Increased
24
Reduced
52
Closed
24
Calls
$3.92M
Puts
$1.88M
Net Calls
+$2.04M
Net Calls Change
+$2.49M

Top Buyers

1
FLAM
First Light Asset Management
Minnesota
+$24.3M
2
IC
Ikarian Capital
Texas
+$14M
3
PM
Prosight Management
Texas
+$6.46M
4
PAI
Palo Alto Investors
California
+$4.29M
5
BFM
Boothbay Fund Management
New York
+$1.48M

Top Sellers

1
O
OrbiMed
New York
-$20.7M
2
State Street
State Street
Massachusetts
-$7.37M
3
GPP
Great Point Partners
Connecticut
-$6.75M
4
Fidelity Investments
Fidelity Investments
Massachusetts
-$6.11M
5
Wellington Management Group
Wellington Management Group
Massachusetts
-$4.51M
Name Holding Trade Value Shares
Change 		Change in
Stake
Acadian Asset Management
26
Acadian Asset Management
Massachusetts
$2.12M -$397K -33,578 -16%
Two Sigma Advisers
27
Two Sigma Advisers
New York
$2.12M -$419K -35,400 -17%
Axa
28
Axa
France
$2.11M – – –
ECM
29
Endurant Capital Management
California
$1.82M -$1.31M -110,953 -42%
Bank of New York Mellon
30
Bank of New York Mellon
New York
$1.68M -$108K -9,160 -6%
PIM
31
Platinum Investment Management
Australia
$1.54M – – –
BFM
32
Boothbay Fund Management
New York
$1.5M +$1.48M +125,249 New
Adage Capital Partners
33
Adage Capital Partners
Massachusetts
$1.5M -$887K -75,000 -38%
Morgan Stanley
34
Morgan Stanley
New York
$1.45M +$387K +32,749 +37%
Massachusetts Financial Services
35
Massachusetts Financial Services
Massachusetts
$1.3M +$253K +21,373 +25%
Russell Investments Group
36
Russell Investments Group
United Kingdom
$1.11M -$43K -3,637 -4%
Prudential Financial
37
Prudential Financial
New Jersey
$929K +$72.1K +6,100 +9%
AA
38
ALPS Advisors
Colorado
$866K +$853K +72,138 New
Man Group
39
Man Group
United Kingdom
$829K -$8.28K -700 -1%
California Public Employees Retirement System
40
California Public Employees Retirement System
California
$821K -$15.4K -1,300 -2%
AC
41
Apogem Capital
New York
$805K +$793K +67,013 New
RhumbLine Advisers
42
RhumbLine Advisers
Massachusetts
$797K +$60.2K +5,090 +8%
Marshall Wace
43
Marshall Wace
United Kingdom
$758K +$746K +63,073 New
PPA
44
Parametric Portfolio Associates
Washington
$723K -$377K -31,875 -35%
Swiss National Bank
45
Swiss National Bank
Switzerland
$695K – – –
Two Sigma Investments
46
Two Sigma Investments
New York
$607K -$582K -49,230 -49%
AllianceBernstein
47
AllianceBernstein
Tennessee
$602K -$58K -4,900 -9%
Wells Fargo
48
Wells Fargo
California
$573K +$134K +11,356 +31%
LCM
49
Lonestar Capital Management
California
$564K -$2M -169,435 -78%
California State Teachers Retirement System (CalSTRS)
50
California State Teachers Retirement System (CalSTRS)
California
$557K – – –
1
2
3 4 5

PRTA Hedge Fund Activity: Q4 2020 in Review

140 of the 5,651 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q4 2020, worth a combined $418M — up 18% from $355M a quarter earlier.

Buyers outnumbered sellers: 25 funds opened new PRTA positions and 24 closed out — a net gain of 1 holder — while 24 added to existing stakes and 52 trimmed.

The largest buyer was First Light Asset Management, opening a new position worth an estimated $24.3M. The largest seller was OrbiMed, cutting an estimated $20.7M.

  • 140 institutional investors held Prothena Corp (PRTA) as of Q4 2020, unchanged from Q3 2020.
  • Funds reported $418M of Prothena Corp stock for Q4 2020, up 18% quarter-over-quarter.
  • 25 funds opened new Prothena Corp positions in Q4 2020 and 24 closed out, a net change of +1 holder.
  • The largest Prothena Corp buyer in Q4 2020 was First Light Asset Management, an estimated $24.3M added.
  • The largest Prothena Corp seller in Q4 2020 was OrbiMed, an estimated $20.7M sold.

Based on aggregated 13F filings for Q4 2020.