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Schedule 13G/A

RLYB Schedule 13G/A filing by Fidelity / FMR

Fidelity / FMR reported beneficial ownership of 561.8K shares, representing 12% of Rallybio Corp in this filing.

FiledMar 6, 2026
Ownership dateMar 4, 2026
Reported shares561.8K
Reported ownership12%
Ownership details

Voting and dispositive power reported in the filing

These figures describe the reporting filer’s disclosed voting and investment authority. They should be read together with the reported share count and percentage.

Sole voting power 561.8K
Shared voting power 561.8K
Sole dispositive power 561.8K
Shared dispositive power 561.8K
Price context

Price dates alongside the ownership filing

Price data provides market context around the disclosure. It does not identify the filer’s actual transaction price.

Close near filing date$10.91as of Mar 6, 2026
Latest tracked price$16.14as of Aug 5, 2026
Source

Original filing and accession

Use the SEC filing as the primary source when you need the complete disclosure, footnotes, exhibits, or reporting-person details.

Reporting filer
Fidelity / FMR
CIK
CIK0000315066
Accession
0000315066-26-000665
Form
Schedule 13G/A
Open SEC filing View RLYB ownership history
Read the filing in context

Understand what a Schedule 13 filing does—and does not—tell you.

How to read a Schedule 13G → Does a 13G mean the shares were just bought? → Filing date vs. ownership date →