RallybioRLYB

13F holders, Q1 2025 (March 31)
47holders −2
2new positions
4sold out
4famous investors
$0.65avg. 13F price*

At the end of Q1 2025, 47 institutions reported holding Rallybio Corp. (RLYB) in their 13F filings, down 2 from Q4 2024. 2 opened new positions and 4 sold out. The largest holders were Viking Global Investors ($2.7M), Johnson & Johnson ($2.4M) and 5AM Venture Management, LLC ($2.4M). 4 famous investors held it, including Andreas Halvorsen (0.0% of Viking Global Investors's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).

Company
Rallybio Corp.
CUSIP
75120L100
Latest filing quarter
Q4 2025

History

Number of 13F holders

020406080 Q1 2024: 62Q1 2024Q2 2024: 66Q2 2024Q3 2024: 49Q3 2024Q4 2024: 49Q4 2024Q1 2025: 47Q1 2025Q2 2025: 48Q2 2025Q3 2025: 45Q3 2025Q4 2025: 45Q4 2025

Total Exit/New Position Q4 2024 → Q1 2025

InstitutionsTotal Value
New Positions2$42K
Exits4$143K

All 13F filers, Q4 2024 → Q1 2025: 165,650 shares bought and 592,741 shares sold, net −427,091 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.

Ownership 47 holders
Viking Global Investors 0.01% No change 4,194,777 $2.7M
Johnson & Johnson 0.70% No change 3,636,363 $2.4M
5AM Venture Management, LLC 0.90% No change 3,630,724 $2.4M
New Leaf Venture Partners, L.L.C. 4.78% No change 3,301,603 $2.1M
TPG GP A, LLC 0.04% No change 3,028,414 $2.0M
Pivotal bioVenture Partners Investment Advisor LLC 1.26% No change 2,404,644 $1.6M
FMR LLC 0.00% Add +1.1% 1,785,218 $1.2M
Aberdeen Group plc 0.00% No change 1,727,067 $1.1M
Canaan Partners XI LLC 1.51% Reduce -9.7% 1,532,552 $1.0M
Almitas Capital LLC 0.28% Add +0.2% 1,300,581 $851K
Vanguard Group Inc. 0.00% Add +5.0% 971,927 $637K
AJU IB Investment Co., Ltd. 0.59% No change 754,678 $494K
Allostery Investments LP 0.71% Reduce -6.4% 752,235 $492K
Laurion Capital Management LP 0.04% No change 735,543 $481K
Mariner, LLC 0.00% No change 404,546 $265K
Renaissance Technologies 0.00% Reduce -10.2% 396,500 $260K
Geode Capital Management, LLC 0.00% Reduce -0.1% 247,552 $162K
Millennium Management 0.00% Reduce -33.0% 227,230 $149K
BlackRock, Inc. 0.00% Add +4.1% 209,419 $137K
Bridgeway Capital Management, LLC 0.00% No change 91,600 $60K
Two Sigma Advisers, LP 0.00% Reduce -0.3% 91,020 $60K
Acadian Asset Management LLC 0.00% No change 90,247 $57K
Two Sigma Investments, LP 0.00% Reduce -13.2% 66,711 $44K
State Street Corp. 0.00% No change 62,072 $41K
Citadel Advisors 0.00% New 52,811 $35K
Wells Fargo & Company 0.00% Add +4.7% 42,200 $28K
Northern Trust Corp. 0.00% Reduce -48.2% 38,124 $25K
Morgan Stanley 0.00% No change 36,484 $24K
Squarepoint Ops LLC 0.00% Add +94.0% 33,270 $22K
Barclays PLC 0.00% No change 15,390 $10K
UBS Group AG 0.00% Add +84.2% 15,398 $10K
Great Valley Advisor Group, Inc. 0.00% No change 15,000 $10K
ADAR1 Capital Management, LLC 0.00% No change 13,400 $9K
Utah Retirement Systems 0.00% No change 13,240 $9K
HSBC Holdings PLC 0.00% Reduce -14.4% 12,054 $8K
Jane Street Group, LLC 0.00% New 10,624 $7K
Point72 Asia (Singapore) Pte. Ltd. 0.00% Reduce -55.8% 10,007 $7K
Mercer Global Advisors Inc. 0.00% No change 10,000 $7K
Captrust Financial Advisors 0.00% No change 10,000 $7K
Bank of America Corp. 0.00% Add +0.1% 8,747 $6K
Hartford Financial Management Inc. 0.00% No change 6,500 $4K
Tower Research Capital LLC (TRC) 0.00% Add +42.9% 5,191 $3K
SBI Securities Co., Ltd. 0.00% Reduce -16.2% 4,488 $3K
Federated Hermes, Inc. 0.00% Reduce -63.1% 2,209 $1K
BNP Paribas Financial Markets 0.00% Reduce -10.6% 983 $643
Point72 (DIFC) Ltd 0.00% Reduce -83.6% 975 $638
JPMorgan Chase & Co. 0.00% Reduce -0.4% 944 $618

"% of holder's portfolio" is RLYB's weight in each manager's 13F, not the share of Rallybio Corp. the manager owns.