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Rallybio
RLYB

Overview Fund Activity

47 hedge funds and large institutions have $20.9M invested in Rallybio in 2025 Q1 according to their latest regulatory filings, with 2 funds opening new positions, 9 increasing their positions, 15 reducing their positions, and 4 closing their positions.

Holders
47
Holders Change
-2
Holders Change %
-4.08%
% of All Funds
0.64%
Holding in Top 10
4
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
2
Increased
9
Reduced
15
Closed
4
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
Citadel Advisors
1
Citadel Advisors
Florida
$34.6K
2
Vanguard Group
2
Vanguard Group
Pennsylvania
$637K
3
Fidelity Investments
3
Fidelity Investments
Massachusetts
$1.17M
4
Squarepoint
4
Squarepoint
New York
$21.8K
5
Jane Street
5
Jane Street
New York
$6.95K

Top Sellers

1
CPX
1
Canaan Partners XI
California
$1M
2
NFC
2
Northeast Financial Consultants
Connecticut
$0
3
Millennium Management
3
Millennium Management
New York
$149K
4
EGM
4
Engineers Gate Manager
New York
$0
5
AI
5
Allostery Investments
Connecticut
$492K
Name Market Value Shares Shares
Change 		Shares
Change %
Viking Global Investors
1
Viking Global Investors
Connecticut
$2.75M 4,194,777 – –
JJ
2
Johnson & Johnson
New Jersey
$2.38M 3,636,363 – –
5VM
3
5AM Venture Management
California
$2.38M 3,630,724 – –
NLVP
4
New Leaf Venture Partners
New York
$2.15M 3,301,603 – –
TGA
5
TPG GP A
Texas
$1.98M 3,028,414 – –
PBPIA
6
Pivotal bioVenture Partners Investment Advisor
California
$1.56M 2,404,644 – –
Fidelity Investments
7
Fidelity Investments
Massachusetts
$1.17M 1,785,218 +18,517 +1%
Aberdeen Group
8
Aberdeen Group
United Kingdom
$1.13M 1,727,067 – –
CPX
9
Canaan Partners XI
California
$1M 1,532,552 -165,132 -10%
AC
10
Almitas Capital
California
$851K 1,300,581 +2,462 +0.2%
Vanguard Group
11
Vanguard Group
Pennsylvania
$637K 971,927 +46,406 +5%
AIIC
12
AJU IB Investment Company
South Korea
$494K 754,678 – –
AI
13
Allostery Investments
Connecticut
$492K 752,235 -51,163 -6%
LCM
14
Laurion Capital Management
New York
$481K 735,543 – –
Mariner
15
Mariner
Kansas
$265K 404,546 – –
Renaissance Technologies
16
Renaissance Technologies
New York
$260K 396,500 -44,818 -10%
Geode Capital Management
17
Geode Capital Management
Massachusetts
$162K 247,552 -275 -0.1%
Millennium Management
18
Millennium Management
New York
$149K 227,230 -111,679 -33%
BlackRock
19
BlackRock
New York
$137K 209,419 +8,200 +4%
BCM
20
Bridgeway Capital Management
Texas
$60K 91,600 – –
Two Sigma Advisers
21
Two Sigma Advisers
New York
$59.6K 91,020 -280 -0.3%
Acadian Asset Management
22
Acadian Asset Management
Massachusetts
$57K 90,247 – –
Two Sigma Investments
23
Two Sigma Investments
New York
$43.7K 66,711 -10,100 -13%
State Street
24
State Street
Massachusetts
$40.6K 62,072 – –
Citadel Advisors
25
Citadel Advisors
Florida
$34.6K 52,811 +52,811 New
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