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Prothena Corp
PRTA

Overview Fund Activity

186 hedge funds and large institutions have $2.56B invested in Prothena Corp in 2023 Q3 according to their latest regulatory filings, with 25 funds opening new positions, 73 increasing their positions, 51 reducing their positions, and 32 closing their positions.

Holders
186
Holders Change
-10
Holders Change %
-5.1%
% of All Funds
2.97%
Holding in Top 10
5
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-16.67%
% of All Funds
0.08%
New
25
Increased
73
Reduced
51
Closed
32
Calls
$9.61M
Puts
$18.1M
Net Calls
-$8.45M
Net Calls Change
+$2.75M

Top Buyers

1
BC
1
Boxer Capital
California
$30.2M
2
T. Rowe Price Associates
2
T. Rowe Price Associates
Maryland
$184M
3
State Street
3
State Street
Massachusetts
$102M
4
Millennium Management
4
Millennium Management
New York
$12.8M
5
Janus Henderson Group
5
Janus Henderson Group
United Kingdom
$88.1M

Top Sellers

1
Man Group
1
Man Group
United Kingdom
$230K
2
APM
2
Avidity Partners Management
Texas
$18.4M
3
RSCM
3
Rock Springs Capital Management
Maryland
$29.6M
4
ACM
4
Atika Capital Management
New York
$0
5
EGI
5
EAM Global Investors
California
$0
Name Market Value Shares Shares
Change 		Shares
Change %
EC
1
EcoR1 Capital
California
$559M 11,584,280 – –
Fidelity Investments
2
Fidelity Investments
Massachusetts
$387M 8,030,290 +117,524 +1%
T. Rowe Price Associates
3
T. Rowe Price Associates
Maryland
$184M 3,820,013 +266,245 +7%
BlackRock
4
BlackRock
New York
$171M 3,541,244 -70,010 -2%
Wellington Management Group
5
Wellington Management Group
Massachusetts
$103M 2,141,647 -69,575 -3%
State Street
6
State Street
Massachusetts
$102M 2,110,233 +236,555 +13%
Janus Henderson Group
7
Janus Henderson Group
United Kingdom
$88.1M 1,826,609 +154,078 +9%
PAI
8
Palo Alto Investors
California
$80M 1,657,458 – –
FLAM
9
First Light Asset Management
Minnesota
$72.1M 1,494,039 -6,090 -0.4%
Dimensional Fund Advisors
10
Dimensional Fund Advisors
Texas
$53.2M 1,102,862 -47,346 -4%
Vanguard Group
11
Vanguard Group
Pennsylvania
$49.7M 1,030,774 -9,907 -1%
Geode Capital Management
12
Geode Capital Management
Massachusetts
$41.5M 859,060 +20,639 +2%
T. Rowe Price Investment Management
13
T. Rowe Price Investment Management
Maryland
$41.2M 853,479 -22,691 -3%
PHS
14
PFM Health Sciences
California
$40.4M 836,571 +62,025 +8%
BC
15
Boxer Capital
California
$30.2M 625,000 +325,000 +108%
RSCM
16
Rock Springs Capital Management
Maryland
$29.6M 614,298 -139,164 -18%
Bank of New York Mellon
17
Bank of New York Mellon
New York
$24.1M 499,382 -14,851 -3%
EAM
18
Eventide Asset Management
Massachusetts
$21.5M 445,155 – –
Nuveen Asset Management
19
Nuveen Asset Management
Illinois
$21.1M 437,270 -5,746 -1%
Northern Trust
20
Northern Trust
Illinois
$19.8M 409,847 -2,128 -0.5%
JPMorgan Chase & Co
21
JPMorgan Chase & Co
New York
$19.4M 402,031 -12,034 -3%
APM
22
Avidity Partners Management
Texas
$18.4M 382,305 -152,695 -29%
FC
23
Finepoint Capital
Massachusetts
$16.9M 349,300 +32,000 +10%
GIM
24
Granahan Investment Management
Massachusetts
$16.8M 348,065 +53,008 +18%
Charles Schwab
25
Charles Schwab
California
$14.9M 308,537 -3,946 -1%
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