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Prothena Corp
PRTA

147 hedge funds and large institutions have $1.42B invested in Prothena Corp in 2015 Q3 according to their latest regulatory filings, with 20 funds opening new positions, 47 increasing their positions, 45 reducing their positions, and 11 closing their positions.

New
Increased
Maintained
Reduced
Closed

82% more first-time investments, than exits

New positions opened: 20 | Existing positions closed: 11

37% more call options, than puts

Call options by funds: $13.1M | Put options by funds: $9.59M

7% more funds holding

Funds holding: 138 → 147 (+9)

4% more repeat investments, than reductions

Existing positions increased: 47 | Existing positions reduced: 45

12% less capital invested

Capital invested by funds: $1.62B → $1.42B (-$195M)

33% less funds holding in top 10

Funds holding in top 10: 3 → 2 (-1)

Holders
147
Holders Change
+9
Holders Change %
+6.52%
% of All Funds
4.1%
Holding in Top 10
2
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-33.33%
% of All Funds
0.06%
New
20
Increased
47
Reduced
45
Closed
11
Calls
$13.1M
Puts
$9.59M
Net Calls
+$3.55M
Net Calls Change
+$1.99M

Top Buyers

1
WIM
Woodford Investment Management
United Kingdom
+$39.3M
2
Citadel Advisors
Citadel Advisors
Florida
+$23.7M
3
BB
BB Biotech
Switzerland
+$18.6M
4
Deutsche Bank
Deutsche Bank
Germany
+$10.5M
5
Axa
Axa
France
+$7.61M

Top Sellers

1
Westfield Capital Management
Westfield Capital Management
Massachusetts
-$23.6M
2
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
-$21.9M
3
Millennium Management
Millennium Management
New York
-$14.9M
4
Marshall Wace
Marshall Wace
United Kingdom
-$11.7M
5
CCI
Columbus Circle Investors
-$7.07M
Name Holding Trade Value Shares
Change 		Change in
Stake
Renaissance Technologies
51
Renaissance Technologies
New York
$1.65M +$2.12M +36,400 New
UBS Group
52
UBS Group
Switzerland
$1.41M +$30.2K +518 +2%
Ameriprise
53
Ameriprise
Minnesota
$1.4M -$788K -13,523 -30%
American Century Companies
54
American Century Companies
Missouri
$1.36M +$1.75M +30,011 New
New York State Common Retirement Fund
55
New York State Common Retirement Fund
New York
$1.35M -$149K -2,560 -8%
California Public Employees Retirement System
56
California Public Employees Retirement System
California
$1.32M +$384K +6,600 +29%
RhumbLine Advisers
57
RhumbLine Advisers
Massachusetts
$1.3M +$55.3K +949 +3%
NI
58
Numeric Investors
Massachusetts
$1.29M +$1.65M +28,400 New
ProShare Advisors
59
ProShare Advisors
Maryland
$1.22M -$118K -2,031 -7%
GCP
60
GSA Capital Partners
United Kingdom
$1.22M +$1.31M +22,539 +527%
HCM
61
Highbridge Capital Management
New York
$1.06M +$1.36M +23,388 New
RFC
62
Russell Frank Company
Washington
$930K -$1.25M -21,391 -51%
NFA
63
Nationwide Fund Advisors
Ohio
$914K -$6.17K -106 -0.5%
Fisher Asset Management
64
Fisher Asset Management
Washington
$863K +$1.11M +19,040 New
QIM
65
Quantitative Investment Management
Virginia
$834K +$320K +5,500 +43%
AIG
66
American International Group
New York
$832K +$1.22K +21 +0.1%
Morgan Stanley
67
Morgan Stanley
New York
$768K +$382K +6,560 +63%
Point72 Asset Management
68
Point72 Asset Management
Connecticut
$766K -$2.63M -45,100 -73%
State Board of Administration of Florida Retirement System
69
State Board of Administration of Florida Retirement System
Florida
$751K +$65.6K +1,126 +7%
WSA
70
Wall Street Associates
California
$717K +$921K +15,811 New
DekaBank Deutsche Girozentrale
71
DekaBank Deutsche Girozentrale
Germany
$714K +$49.5K +850 +6%
TCM
72
Traynor Capital Management
Pennsylvania
$711K +$575K +9,870 +169%
Goldman Sachs
73
Goldman Sachs
New York
$695K +$70.6K +1,212 +9%
BAMS
74
Bellevue Asset Management (Switzerland)
Switzerland
$680K +$116K +2,000 +15%
CCA
75
Checchi Capital Advisers
California
$636K – – –
1 2
3
4 5

PRTA Hedge Fund Activity: Q3 2015 in Review

147 of the 3,582 institutional investors tracked by Wall St. Rank reported a position in Prothena Corp (PRTA) for Q3 2015, worth a combined $1.42B — down 12% from $1.62B a quarter earlier.

Buyers outnumbered sellers: 20 funds opened new PRTA positions and 11 closed out — a net gain of 9 holders — while 47 added to existing stakes and 45 trimmed.

The largest buyer was Woodford Investment Management, adding an estimated $39.3M. The largest seller was Westfield Capital Management, cutting an estimated $23.6M.

  • 147 institutional investors held Prothena Corp (PRTA) as of Q3 2015, up from 138 in Q2 2015.
  • Funds reported $1.42B of Prothena Corp stock for Q3 2015, down 12% quarter-over-quarter.
  • 20 funds opened new Prothena Corp positions in Q3 2015 and 11 closed out, a net change of +9 holders.
  • The largest Prothena Corp buyer in Q3 2015 was Woodford Investment Management, an estimated $39.3M added.
  • The largest Prothena Corp seller in Q3 2015 was Westfield Capital Management, an estimated $23.6M sold.

Based on aggregated 13F filings for Q3 2015.