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Prothena Corp
PRTA

118 hedge funds and large institutions have $832M invested in Prothena Corp in 2014 Q1 according to their latest regulatory filings, with 29 funds opening new positions, 42 increasing their positions, 23 reducing their positions, and 17 closing their positions.

New
Increased
Maintained
Reduced
Closed

94% more capital invested

Capital invested by funds: $429M → $832M (+$402M)

83% more repeat investments, than reductions

Existing positions increased: 42 | Existing positions reduced: 23

71% more first-time investments, than exits

New positions opened: 29 | Existing positions closed: 17

10% more funds holding

Funds holding: 107 → 118 (+11)

0% more funds holding in top 10

Funds holding in top 10: 2 → 2 (0)

6% less call options, than puts

Call options by funds: $8.75M | Put options by funds: $9.26M

Holders
118
Holders Change
+11
Holders Change %
+10.28%
% of All Funds
3.41%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.06%
New
29
Increased
42
Reduced
23
Closed
17
Calls
$8.75M
Puts
$9.26M
Net Calls
-$515K
Net Calls Change
-$2.3M

Top Buyers

Rank Fund Capital Flow
1
Fidelity Investments
Fidelity Investments
Massachusetts
+$36.4M
2
Capital World Investors
Capital World Investors
California
+$26.6M
3
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
+$25.7M
4
O
OrbiMed
New York
+$22.1M
5
Millennium Management
Millennium Management
New York
+$17.8M

Top Sellers

Rank Fund Capital Flow
1
DM
Deerfield Management
New York
-$14M
2
Westfield Capital Management
Westfield Capital Management
Massachusetts
-$13.8M
3
Adage Capital Partners
Adage Capital Partners
Massachusetts
-$4.84M
4
BBA
Baker Bros. Advisors
New York
-$3.44M
5
RCM
RA Capital Management
Massachusetts
-$2.78M
Name Holding Trade Value Shares
Change 		Change in
Stake
Geode Capital Management
26
Geode Capital Management
Massachusetts
$4.69M +$1.01M +31,377 +34%
Invesco
27
Invesco
Georgia
$4.54M +$1.02M +31,674 +36%
GTC
28
Ghost Tree Capital
New York
$4.21M -$645K -20,000 -15%
Bank of New York Mellon
29
Bank of New York Mellon
New York
$3.29M +$447K +13,866 +19%
PC
30
PointState Capital
New York
$3.06M +$2.58M +80,000 New
Renaissance Technologies
31
Renaissance Technologies
New York
$3.03M +$468K +14,512 +22%
Two Sigma Investments
32
Two Sigma Investments
New York
$2.52M +$1.55M +47,993 +270%
JG
33
Jefferies Group
New York
$2.5M +$2.11M +65,350 New
RSCM
34
Rock Springs Capital Management
Maryland
$2.49M +$2.1M +65,000 New
TCIM
35
TIAA CREF Investment Management
New York
$2.47M -$63.5K -1,971 -3%
EAM
36
Eventide Asset Management
Massachusetts
$2.23M +$1.88M +58,300 New
ACM
37
Atika Capital Management
New York
$2.2M +$645K +20,000 +53%
SFM
38
Sphera Funds Management
Israel
$2.11M +$161K +5,000 +10%
SIM
39
Spark Investment Management
New York
$2.01M +$351K +10,900 +26%
BIM
40
BlackRock Investment Management
Delaware
$1.86M +$20K +620 +1%
WC
41
Wexford Capital
Florida
$1.85M +$1.55M +48,195 New
WMSA
42
Weiss Multi-Strategy Advisers
New York
$1.53M -$1.13M -35,000 -47%
GIM
43
Granahan Investment Management
Massachusetts
$1.3M – – –
Goldman Sachs
44
Goldman Sachs
New York
$1.23M -$2.09M -64,902 -67%
ProShare Advisors
45
ProShare Advisors
Maryland
$1.19M +$659K +20,452 +191%
ARC
46
Absolute Return Capital
Massachusetts
$1.06M +$892K +27,665 New
ARTA
47
A.R.T. Advisors
New York
$1.05M +$608K +18,847 +216%
CS
48
Credit Suisse
Switzerland
$1.01M +$176K +5,469 +26%
California State Teachers Retirement System (CalSTRS)
49
California State Teachers Retirement System (CalSTRS)
California
$988K – – –
IHM
50
Iguana Healthcare Management
New York
$958K +$806K +25,000 New
1
2
3 4 5

PRTA Hedge Fund Activity: Q1 2014 in Review

118 of the 3,462 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q1 2014, worth a combined $832M — up 94% from $429M a quarter earlier.

Buyers outnumbered sellers: 29 funds opened new PRTA positions and 17 closed out — a net gain of 12 holders — while 42 added to existing stakes and 23 trimmed.

The largest buyer was Fidelity Investments, adding an estimated $36.4M. The largest seller was Deerfield Management, exiting entirely with an estimated $14M sold.

  • 118 institutional investors held Prothena Corp (PRTA) as of Q1 2014, up from 107 in Q4 2013.
  • Funds reported $832M of Prothena Corp stock for Q1 2014, up 94% quarter-over-quarter.
  • 29 funds opened new Prothena Corp positions in Q1 2014 and 17 closed out, a net change of +12 holders.
  • The largest Prothena Corp buyer in Q1 2014 was Fidelity Investments, an estimated $36.4M added.
  • The largest Prothena Corp seller in Q1 2014 was Deerfield Management, an estimated $14M sold.

Based on aggregated 13F filings for Q1 2014.