Rallybio director Nash exercises 3,562 options

Nash's reported post-exercise position was 3,562 common shares, while the option row shows zero remaining.

Available on EDGAR 10/30/2026 - 06:06 PM EDT Accepted by SEC EDGAR 10/30/2026 - 06:06 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Rallybio Corp (RLYB) director Christine A. Nash exercised 3,562 options on October 28, 2026, at an exercise price of $2.38 per share, acquiring 3,562 common shares. Her reported position after the transaction was 3,562 common shares, and the option position following the transaction was 0. The option was granted under the company's 2021 Equity Incentive Plan.

Insider Trade Summary

3,562 shares exercised/converted

Exercise 2 txns

Insider Nash Christine A

Role Director

Type	Security	Shares	Price	Value
Exercise	Option (Right to Buy) F1	3,562	$0.00	$0.00
Exercise	Common Stock	3,562	$2.38	$8K

Holdings After Transaction: Option (Right to Buy) — 0 contracts (Direct); Common Stock — 3,562 shares (Direct)

Footnotes (1)

1. F1. The option was granted under the Company's 2021 Equity Incentive Plan. The option vests on the earlier of May 13, 2026 or the date of the Company's 2026 Annual Meeting of Stockholders.

Key Figures

Options exercised: 3,562 options Exercise price: $2.38 per share Common shares acquired: 3,562 shares +1 more

4 metrics

Options exercised 3,562 options October 28, 2026

Exercise price $2.38 per share Options exercised October 28, 2026

Common shares acquired 3,562 shares October 28, 2026

Common shares after transaction 3,562 shares Reported following the October 28, 2026 transaction

Key Terms

Option (Right to Buy), 2021 Equity Incentive Plan, vests

3 terms

Option (Right to Buy) financial

"Option (Right to Buy)"

2021 Equity Incentive Plan financial

"granted under the Company's 2021 Equity Incentive Plan"

vests financial

"The option vests on the earlier of May 13, 2026"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many options did Rallybio director Christine A. Nash exercise?

Christine A. Nash exercised 3,562 options on October 28, 2026, at $2.38 per share, acquiring 3,562 common shares; her reported position afterward was 3,562 common shares.

What were the vesting terms for Christine A. Nash's Rallybio option?

The option was granted under Rallybio's 2021 Equity Incentive Plan and vests on the earlier of May 13, 2026, or the date of Rallybio's 2026 Annual Meeting of Stockholders.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Nash Christine A

(Last) (First) (Middle)

C/O RALLYBIO CORPORATION

PO BOX 325

(Street)

EAST BERLIN CONNECTICUT 06023

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Rallybio Corp [ RLYB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/28/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/28/2026		M		3,562	A	$2.38	3,562	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Option (Right to Buy)	$2.38	10/28/2026		M			3,562	(1)	05/13/2035	Common Stock	3,562	$0	0	D

Explanation of Responses:

1. The option was granted under the Company's 2021 Equity Incentive Plan. The option vests on the earlier of May 13, 2026 or the date of the Company's 2026 Annual Meeting of Stockholders.

	By: /s/ Jonathan Lieber, Attorney-in-Fact	10/30/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)