Jonathan I. Lieber - 18 Feb 2026 Form 4 Insider Report for Rallybio Corp (RLYB)

Reporting relationship: Chief Financial Officer
Issuer ticker: RLYB
Reported as of: 18 Feb 2026
Net transaction value: -$3,992
SEC form: 4
Accepted by SEC: 23 Feb 2026, 18:21:32 UTC
Prior SEC filing: 19 Feb 2025
Source filing: View source filing
Reporting owner signature: By:/s/ Stephen Uden, Attorney-in-Fact

Key filing fact

Jonathan I. Lieber filed Form 4 for Rallybio Corp (RLYB) on 23 Feb 2026.

Key facts

This page summarizes Jonathan I. Lieber's Form 4 filing for Rallybio Corp (RLYB).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 23 Feb 2026, 18:21.

Change

Previous filing in this sequence was filed on 19 Feb 2025.
Current net transaction value: -$3,992.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001350090 Primary reporting owner

Lieber Jonathan I

Relationship: Chief Financial Officer
Address: C/O RALLYBIO CORPORATION, 234 CHURCH STREET, NEW HAVEN
Signature: By:/s/ Stephen Uden, Attorney-in-Fact
Signature date: 23 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RLYB transaction

Common Stock

Award

Transaction value: $0
Shares: +2,500
Change %: +104%
Price: $0.000000
Shares after: 4,904
Date: 18 Feb 2026
Ownership: Direct

RLYB transaction

Common Stock

Sale

Transaction value: $3,992
Shares: -789
Change %: -16%
Price: $5.06^*
Shares after: 4,115
Date: 23 Feb 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The reporting person sold shares of common stock upon the partial vesting of a performance stock award, solely to satisfy tax withholding obligations incurred upon vesting.