Helen M. Boudreau - 06 Jul 2026 Form 4 Insider Report for Rallybio Corp (RLYB)

Reporting relationship: Director
Issuer ticker: RLYB
Reported as of: 06 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 10 Jul 2026, 16:14:56 UTC
Prior SEC filing: 02 Jun 2026
Source filing: View source filing
Reporting owner signature: By: /s/ Jonathan Lieber, Attorney-in-Fact

Key filing fact

Helen M. Boudreau filed Form 4 for Rallybio Corp (RLYB) on 10 Jul 2026.

Key facts

This page summarizes Helen M. Boudreau's Form 4 filing for Rallybio Corp (RLYB).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 10 Jul 2026, 16:14.

Change

Previous filing in this sequence was filed on 02 Jun 2026.
Current net transaction value: $0.

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 0001661481 Primary reporting owner

Boudreau Helen M

Relationship: Director
Address: C/O RALLYBIO CORPORATION, PO BOX 325, EAST BERLIN
Signature: By: /s/ Jonathan Lieber, Attorney-in-Fact
Signature date: 10 Jul 2026

Reported non-derivative transactions

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

RLYB transaction

Common Stock

Options Exercise

Transaction value
Shares: +3,562
Change %: +120%
Price: $2.38^*
Shares after: 6,542
Date: 06 Jul 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RLYB transaction Derivative

Option (Right to Buy)

Options Exercise

Transaction value
Shares: -3,562
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 06 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,562
Exercise price: $2.38

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

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