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Prothena Corp
PRTA

129 hedge funds and large institutions have $398M invested in Prothena Corp in 2020 Q1 according to their latest regulatory filings, with 12 funds opening new positions, 38 increasing their positions, 38 reducing their positions, and 21 closing their positions.

New
Increased
Maintained
Reduced
Closed

319% more call options, than puts

Call options by funds: $2.57M | Put options by funds: $614K

100% more funds holding in top 10

Funds holding in top 10: 1 → 2 (+1)

0.66% more ownership

Funds ownership: 92.49% → 93.14% (+0.66%)

0% more repeat investments, than reductions

Existing positions increased: 38 | Existing positions reduced: 38

9% less funds holding

Funds holding: 141 → 129 (-12)

32% less capital invested

Capital invested by funds: $584M → $398M (-$186M)

43% less first-time investments, than exits

New positions opened: 12 | Existing positions closed: 21

Holders
129
Holders Change
-12
Holders Change %
-8.51%
% of All Funds
2.84%
Holding in Top 10
2
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+100%
% of All Funds
0.04%
New
12
Increased
38
Reduced
38
Closed
21
Calls
$2.57M
Puts
$614K
Net Calls
+$1.96M
Net Calls Change
-$6.02M

Top Buyers

1
RSCM
Rock Springs Capital Management
Maryland
+$6.06M
2
Point72 Asset Management
Point72 Asset Management
Connecticut
+$2.35M
3
Hudson Bay Capital Management
Hudson Bay Capital Management
Connecticut
+$2M
4
ECM
Endurant Capital Management
California
+$1.77M
5
N
Nuveen
North Carolina
+$1.59M

Top Sellers

1
PAI
Palo Alto Investors
California
-$2.63M
2
Fidelity Investments
Fidelity Investments
Massachusetts
-$2.35M
3
Citadel Advisors
Citadel Advisors
Florida
-$2.03M
4
Balyasny Asset Management
Balyasny Asset Management
Illinois
-$1.9M
5
OAM
Oxford Asset Management
United Kingdom
-$1.88M
Name Holding Trade Value Shares
Change 		Change in
Stake
EC
1
EcoR1 Capital
California
$101M – – –
BlackRock
2
BlackRock
New York
$36.3M -$433K -35,749 -1%
Fidelity Investments
3
Fidelity Investments
Massachusetts
$33.5M -$2.35M -194,096 -6%
O
4
OrbiMed
New York
$31.1M – – –
GPP
5
Great Point Partners
Connecticut
$22.3M -$219K -18,100 -0.9%
Dimensional Fund Advisors
6
Dimensional Fund Advisors
Texas
$19.6M -$56.1K -4,629 -0.3%
State Street
7
State Street
Massachusetts
$11.3M +$184K +15,176 +1%
Wellington Management Group
8
Wellington Management Group
Massachusetts
$9.96M -$522K -43,104 -4%
Vanguard Group
9
Vanguard Group
Pennsylvania
$8.48M +$288K +23,756 +3%
PAI
10
Palo Alto Investors
California
$8.3M -$2.63M -217,453 -22%
Citadel Advisors
11
Citadel Advisors
Florida
$8.09M -$2.03M -167,775 -18%
Millennium Management
12
Millennium Management
New York
$6.81M +$1.34M +110,541 +21%
Geode Capital Management
13
Geode Capital Management
Massachusetts
$6.31M +$252K +20,791 +4%
Point72 Asset Management
14
Point72 Asset Management
Connecticut
$5.52M +$2.35M +193,743 +60%
Northern Trust
15
Northern Trust
Illinois
$5.51M -$242 -20 -0%
N
16
Nuveen
North Carolina
$5.48M +$1.59M +131,483 +35%
RSCM
17
Rock Springs Capital Management
Maryland
$5.35M +$6.06M +500,000 New
WP
18
Woodline Partners
California
$4.55M +$1.22M +100,911 +31%
TCM
19
Tang Capital Management
California
$4.54M – – –
Goldman Sachs
20
Goldman Sachs
New York
$4.38M -$728K -60,126 -13%
PA
21
Pinnacle Associates
New York
$3.73M -$616K -50,831 -13%
LCM
22
Lonestar Capital Management
California
$3.64M +$485K +40,006 +13%
D.E. Shaw & Co
23
D.E. Shaw & Co
New York
$3.62M -$74.6K -6,163 -2%
Jacobs Levy Equity Management
24
Jacobs Levy Equity Management
New Jersey
$3.56M +$223K +18,391 +6%
Bank of New York Mellon
25
Bank of New York Mellon
New York
$3.56M -$49.3K -4,072 -1%
1
2 3 4 5

PRTA Hedge Fund Activity: Q1 2020 in Review

129 of the 4,538 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q1 2020, worth a combined $398M — down 32% from $584M a quarter earlier.

Sellers outnumbered buyers: 21 funds closed out of PRTA and 12 opened new positions — a net loss of 9 holders — while 38 trimmed existing stakes and 38 added.

The largest buyer was Rock Springs Capital Management, opening a new position worth an estimated $6.06M. The largest seller was Palo Alto Investors, cutting an estimated $2.63M.

  • 129 institutional investors held Prothena Corp (PRTA) as of Q1 2020, down from 141 in Q4 2019.
  • Funds reported $398M of Prothena Corp stock for Q1 2020, down 32% quarter-over-quarter.
  • 12 funds opened new Prothena Corp positions in Q1 2020 and 21 closed out, a net change of -9 holders.
  • The largest Prothena Corp buyer in Q1 2020 was Rock Springs Capital Management, an estimated $6.06M added.
  • The largest Prothena Corp seller in Q1 2020 was Palo Alto Investors, an estimated $2.63M sold.

Based on aggregated 13F filings for Q1 2020.