RLYB icon

Rallybio
RLYB

Overview Fund Activity

48 hedge funds and large institutions have $10.5M invested in Rallybio in 2025 Q2 according to their latest regulatory filings, with 7 funds opening new positions, 8 increasing their positions, 12 reducing their positions, and 6 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
48
Holders Change
+1
Holders Change %
+2.13%
% 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
7
Increased
8
Reduced
12
Closed
6
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
AC
Almitas Capital
California
$614K
2
UBS Group
UBS Group
Switzerland
$40.6K
3
Renaissance Technologies
Renaissance Technologies
New York
$164K
4
Fidelity Investments
Fidelity Investments
Massachusetts
$632K
5
VF
Virtu Financial
New York
$19K

Top Sellers

1
AI
Allostery Investments
Connecticut
$0
2
CPX
Canaan Partners XI
California
$318K
3
BCM
Bridgeway Capital Management
Texas
$0
4
Aberdeen Group
Aberdeen Group
United Kingdom
$539K
5
Squarepoint
Squarepoint
New York
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
Viking Global Investors
1
Viking Global Investors
Connecticut
$1.42M – – –
5VM
2
5AM Venture Management
California
$1.23M – – –
JJ
3
Johnson & Johnson
New Jersey
$1.21M – – –
NLVP
4
New Leaf Venture Partners
New York
$1.12M – – –
TGA
5
TPG GP A
Texas
$1.02M – – –
PBPIA
6
Pivotal bioVenture Partners Investment Advisor
California
$813K – – –
Fidelity Investments
7
Fidelity Investments
Massachusetts
$632K +$28.8K +85,058 +5%
AC
8
Almitas Capital
California
$614K +$175K +516,911 +40%
Aberdeen Group
9
Aberdeen Group
United Kingdom
$539K -$44.6K -131,805 -8%
CPX
10
Canaan Partners XI
California
$318K -$200K -591,568 -39%
Vanguard Group
11
Vanguard Group
Pennsylvania
$308K -$21K -61,986 -6%
AIIC
12
AJU IB Investment Company
South Korea
$255K – – –
LCM
13
Laurion Capital Management
New York
$249K – – –
Renaissance Technologies
14
Renaissance Technologies
New York
$164K +$29.9K +88,532 +22%
Mariner
15
Mariner
Kansas
$137K – – –
Geode Capital Management
16
Geode Capital Management
Massachusetts
$82.8K -$860 -2,543 -1%
Millennium Management
17
Millennium Management
New York
$60.8K -$16K -47,391 -21%
BlackRock
18
BlackRock
New York
$52.3K -$18.5K -54,771 -26%
UBS Group
19
UBS Group
Switzerland
$40.6K +$35.4K +104,844 +681%
Two Sigma Advisers
20
Two Sigma Advisers
New York
$30K -$717 -2,120 -2%
Acadian Asset Management
21
Acadian Asset Management
Massachusetts
$29K – – –
Citadel Advisors
22
Citadel Advisors
Florida
$21.9K +$4.08K +12,073 +23%
Two Sigma Investments
23
Two Sigma Investments
New York
$21.6K -$989 -2,925 -4%
State Street
24
State Street
Massachusetts
$21K – – –
VF
25
Virtu Financial
New York
$19K +$19K +56,762 New
1
2 3