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Disclosery

RLYB RALLYBIO CORP

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COM (common), issuer CIK 1739410

35 managers (37 13F filers) reported a position in RLYB shares at 2026-06-30, 11,698,780 shares in all. 9 filers opened a position and 10 filers sold out during the quarter.

Managers
35
13F filers
37
New
9
Added
9
Reduced
7
Sold out
10
Shares held by filers
11,698,780

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC926,352$14.8M0.7%+905,81713F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC7,705,787$12.7M0.01%+7,685,90113F-HRTimelineGroup
FMR LLCin group FMR LLC794,720$12.7M<0.01%+1,26913F-HRTimelineGroup
VIKING GLOBAL INVESTORS LPin group VIKING GLOBAL INVESTORS LP524,347$8.39M0.02%013F-HRTimelineGroup
TPG GP A, LLCin group TPG GP A, LLC378,551$6.06M0.12%013F-HRTimelineGroup
Pivotal bioVenture Partners Investment …in group Pivotal bioVenture Partners I…300,579$4.81M1.56%013F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC199,907$3.2M<0.01%+43,38013F-HRTimeline
VANGUARD GROUP INCgroup of 3 filers holding190,759$3.05M+63,730Timeline
Nantahala Capital Management, LLC188,422$3.01M0.18%-112,21313F-HR/ATimeline
Almitas Capital LLC120,682$1.93M0.46%-70,52413F-HRTimeline
Rangeley Capital, LLC104,850$1.68M1.56%+74,72013F-HRTimeline
Mariner, LLCin group Mariner, LLC50,566$809K<0.01%013F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC47,423$759K<0.01%new13F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC32,047$513K<0.01%-3,37813F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.30,332$485K<0.01%+12,84613F-HRTimelineGroup
HRT FINANCIAL LP25,657$410K<0.01%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd21,497$344K<0.01%+10,27113F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP16,619$266K<0.01%new13F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP12,996$208K<0.01%new13F-HRTimelineGroup
Quadrature Capital Ltdin group Quadrature Capital Ltd12,995$208K<0.01%new13F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP11,280$180K<0.01%013F-HRTimelineGroup
Hartford Financial Management Inc.812$13K<0.01%013F-HRTimeline
SBI Securities Co., Ltd.506$8.1K<0.01%-1813F-HRTimeline
Caitong International Asset Management …434$6.94K<0.01%new13F-HRTimeline
UBS Group AGin group UBS Group AG146$2.34K<0.01%-7,76813F-HRTimelineGroup
Truvestments Capital LLC129$2.06K<0.01%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY125$2K<0.01%-113F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS120$1.92K<0.01%013F-HRTimelineGroup
Fortitude Family Office, LLC53$848<0.01%013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN37$592<0.01%013F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…31$496<0.01%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO9$145<0.01%-2,48813F-HRTimelineGroup
Allworth Financial LP6$96<0.01%013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC3$48<0.01%new13F-HRTimelineGroup
DANSKE BANK A/S1$16<0.01%013F-HRTimeline