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Prothena Corp
PRTA

140 hedge funds and large institutions have $355M invested in Prothena Corp in 2020 Q3 according to their latest regulatory filings, with 19 funds opening new positions, 32 increasing their positions, 49 reducing their positions, and 18 closing their positions.

New
Increased
Maintained
Reduced
Closed

6% more first-time investments, than exits

New positions opened: 19 | Existing positions closed: 18

1% more funds holding

Funds holding: 139 → 140 (+1)

3.69% less ownership

Funds ownership: 94.43% → 90.74% (-3.7%)

10% less capital invested

Capital invested by funds: $394M → $355M (-$39.6M)

22% less call options, than puts

Call options by funds: $1.6M | Put options by funds: $2.05M

35% less repeat investments, than reductions

Existing positions increased: 32 | Existing positions reduced: 49

50% less funds holding in top 10

Funds holding in top 10: 2 → 1 (-1)

Holders
140
Holders Change
+1
Holders Change %
+0.72%
% of All Funds
2.82%
Holding in Top 10
1
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-50%
% of All Funds
0.02%
New
19
Increased
32
Reduced
49
Closed
18
Calls
$1.6M
Puts
$2.05M
Net Calls
-$449K
Net Calls Change
+$1.15M

Top Buyers

1
BlackRock
BlackRock
New York
+$8.32M
2
PAI
Palo Alto Investors
California
+$6.71M
3
PM
Prosight Management
Texas
+$6.56M
4
Adage Capital Partners
Adage Capital Partners
Massachusetts
+$2.11M
5
Goldman Sachs
Goldman Sachs
New York
+$1.07M

Top Sellers

1
SCM
Soleus Capital Management
Connecticut
-$7.06M
2
GPP
Great Point Partners
Connecticut
-$6.43M
3
WP
Woodline Partners
California
-$5.1M
4
Wellington Management Group
Wellington Management Group
Massachusetts
-$3.6M
5
Point72 Asset Management
Point72 Asset Management
Connecticut
-$2.78M
Name Holding Trade Value Shares
Change 		Change in
Stake
EC
1
EcoR1 Capital
California
$94.2M – – –
BlackRock
2
BlackRock
New York
$37.2M +$8.32M +691,989 +23%
O
3
OrbiMed
New York
$35.4M – – –
Fidelity Investments
4
Fidelity Investments
Massachusetts
$20M +$495K +41,121 +2%
Dimensional Fund Advisors
5
Dimensional Fund Advisors
Texas
$17.6M -$443K -36,831 -2%
GPP
6
Great Point Partners
Connecticut
$15.5M -$6.43M -534,362 -26%
PAI
7
Palo Alto Investors
California
$13.3M +$6.71M +557,669 +72%
State Street
8
State Street
Massachusetts
$12.3M -$2.46M -204,174 -14%
RSCM
9
Rock Springs Capital Management
Maryland
$10.2M +$433K +35,989 +4%
Wellington Management Group
10
Wellington Management Group
Massachusetts
$6.06M -$3.6M -299,319 -33%
Vanguard Group
11
Vanguard Group
Pennsylvania
$5.74M -$2.39M -199,075 -26%
PM
12
Prosight Management
Texas
$5.45M +$6.56M +545,195 New
Goldman Sachs
13
Goldman Sachs
New York
$5.14M +$1.07M +88,627 +21%
Geode Capital Management
14
Geode Capital Management
Massachusetts
$4.68M -$965K -80,180 -15%
Northern Trust
15
Northern Trust
Illinois
$3.86M -$538K -44,714 -10%
N
16
Nuveen
North Carolina
$3.81M +$254K +21,076 +6%
AG
17
Artal Group
Luxembourg
$3.51M -$223K -18,500 -5%
PA
18
Pinnacle Associates
New York
$3.31M -$143K -11,901 -3%
Jacobs Levy Equity Management
19
Jacobs Levy Equity Management
New Jersey
$3.18M -$176K -14,615 -4%
D.E. Shaw & Co
20
D.E. Shaw & Co
New York
$2.94M -$661K -54,909 -16%
Renaissance Technologies
21
Renaissance Technologies
New York
$2.65M -$1.48M -122,762 -32%
ECM
22
Endurant Capital Management
California
$2.63M -$1.7M -141,020 -35%
Hudson Bay Capital Management
23
Hudson Bay Capital Management
Connecticut
$2.25M +$222K +18,445 +9%
LCM
24
Lonestar Capital Management
California
$2.16M -$874K -72,620 -25%
Two Sigma Advisers
25
Two Sigma Advisers
New York
$2.11M -$38.5K -3,200 -1%
1
2 3 4 5

PRTA Hedge Fund Activity: Q3 2020 in Review

140 of the 4,956 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q3 2020, worth a combined $355M — down 10% from $394M a quarter earlier.

Buyers outnumbered sellers: 19 funds opened new PRTA positions and 18 closed out — a net gain of 1 holder — while 32 added to existing stakes and 49 trimmed.

The largest buyer was BlackRock, adding an estimated $8.32M. The largest seller was Soleus Capital Management, exiting entirely with an estimated $7.06M sold.

  • 140 institutional investors held Prothena Corp (PRTA) as of Q3 2020, up from 139 in Q2 2020.
  • Funds reported $355M of Prothena Corp stock for Q3 2020, down 10% quarter-over-quarter.
  • 19 funds opened new Prothena Corp positions in Q3 2020 and 18 closed out, a net change of +1 holder.
  • The largest Prothena Corp buyer in Q3 2020 was BlackRock, an estimated $8.32M added.
  • The largest Prothena Corp seller in Q3 2020 was Soleus Capital Management, an estimated $7.06M sold.

Based on aggregated 13F filings for Q3 2020.