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Prothena Corp
PRTA

Overview Fund Activity

191 hedge funds and large institutions have $2.51B invested in Prothena Corp in 2023 Q1 according to their latest regulatory filings, with 27 funds opening new positions, 70 increasing their positions, 56 reducing their positions, and 32 closing their positions.

Holders
191
Holders Change
-10
Holders Change %
-4.98%
% of All Funds
3.06%
Holding in Top 10
7
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-12.5%
% of All Funds
0.11%
New
27
Increased
70
Reduced
56
Closed
32
Calls
$7.72M
Puts
$3.57M
Net Calls
+$4.15M
Net Calls Change
-$12.3M

Top Buyers

1
Fidelity Investments
1
Fidelity Investments
Massachusetts
$328M
2
Wellington Management Group
2
Wellington Management Group
Massachusetts
$110M
3
Bank of America
3
Bank of America
North Carolina
$27.4M
4
Janus Henderson Group
4
Janus Henderson Group
United Kingdom
$77.4M
5
Two Sigma Investments
5
Two Sigma Investments
New York
$17.7M

Top Sellers

1
APM
1
Avidity Partners Management
Texas
$51.8M
2
SCM
2
Suvretta Capital Management
New York
$0
3
WP
3
Woodline Partners
California
$0
4
MRCP
4
Maple Rock Capital Partners
Ontario, Canada
$14.2M
5
PHS
5
PFM Health Sciences
California
$37.5M
Name Market Value Shares Shares
Change 		Shares
Change %
EC
1
EcoR1 Capital
California
$561M 11,584,280 – –
Fidelity Investments
2
Fidelity Investments
Massachusetts
$328M 6,762,025 +2,814,753 +71%
BlackRock
3
BlackRock
New York
$176M 3,624,627 +139,559 +4%
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$155M 3,202,293 -3,610 -0.1%
Wellington Management Group
5
Wellington Management Group
Massachusetts
$110M 2,266,078 +501,185 +28%
State Street
6
State Street
Massachusetts
$102M 2,102,458 +50,498 +2%
PAI
7
Palo Alto Investors
California
$80.6M 1,663,777 +5,200 +0.3%
Janus Henderson Group
8
Janus Henderson Group
United Kingdom
$77.4M 1,596,303 +163,980 +11%
FLAM
9
First Light Asset Management
Minnesota
$73.2M 1,511,168 -24,431 -2%
Dimensional Fund Advisors
10
Dimensional Fund Advisors
Texas
$59.7M 1,232,635 -87,866 -7%
APM
11
Avidity Partners Management
Texas
$51.8M 1,068,200 -1,884,800 -64%
Vanguard Group
12
Vanguard Group
Pennsylvania
$45.8M 944,556 +74,422 +9%
T. Rowe Price Investment Management
13
T. Rowe Price Investment Management
Maryland
$44.3M 914,683 -13,276 -1%
Geode Capital Management
14
Geode Capital Management
Massachusetts
$37.8M 779,824 +64,223 +9%
PHS
15
PFM Health Sciences
California
$37.5M 774,546 -100,918 -12%
RSCM
16
Rock Springs Capital Management
Maryland
$36.5M 753,462 – –
Bank of America
17
Bank of America
North Carolina
$27.4M 564,441 +442,770 +364%
Nuveen Asset Management
18
Nuveen Asset Management
Illinois
$24.6M 506,728 -66,062 -12%
PM
19
Prosight Management
Texas
$21.7M 447,092 +117,092 +35%
EAM
20
Eventide Asset Management
Massachusetts
$21.3M 438,732 – –
Renaissance Technologies
21
Renaissance Technologies
New York
$19.7M 407,300 -67,600 -14%
Northern Trust
22
Northern Trust
Illinois
$18.5M 382,688 +21,103 +6%
Two Sigma Advisers
23
Two Sigma Advisers
New York
$18.5M 381,300 +54,300 +17%
Two Sigma Investments
24
Two Sigma Investments
New York
$17.7M 365,539 +162,104 +80%
Point72 Asset Management
25
Point72 Asset Management
Connecticut
$16.2M 334,993 +23,493 +8%
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