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

Role: Chief Financial Officer
Signature: By:/s/ Stephen Uden, Attorney-in-Fact
Issuer symbol: RLYB
Transactions as of: 18 Feb 2026
Net transactions value: -$3,992
Form type: 4
Filing time: 23 Feb 2026, 18:21:32 UTC
Previous filing: 19 Feb 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Lieber Jonathan I	Chief Financial Officer	C/O RALLYBIO CORPORATION, 234 CHURCH STREET, NEW HAVEN	By:/s/ Stephen Uden, Attorney-in-Fact	23 Feb 2026	0001350090

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RLYB	Common Stock	Award	$0	+2,500	+104%	$0.000000	4,904	18 Feb 2026	Direct
transaction	RLYB	Common Stock	Sale	$3,992	-789	-16%	$5.06^*	4,115	23 Feb 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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.