Laurion Capital exits Rallybio (RLYB) position, reports 0% beneficial ownership

Rhea-AI Filing Summary

Rallybio Corp received an amended Schedule 13G filing in which Laurion Capital Management LP and its co-managing members, Benjamin Alexander Smith and Janaka Sheehan Maduraperuma, report that they beneficially own 0 shares of Rallybio common stock, representing 0% of the class.

The reporting persons state they have no sole or shared power to vote or dispose of any Rallybio shares, and affirm ownership of 5 percent or less of the outstanding common stock.

Key Figures

Beneficially owned shares: 0 shares Percent of class owned: 0 % Sole voting power: 0 shares +3 more

6 metrics

Beneficially owned shares 0 shares Laurion Capital Management LP and related reporting persons

Percent of class owned 0 % Rallybio common stock reported by each reporting person

Sole voting power 0 shares Shares over which each reporting person can solely vote

Shared voting power 0 shares Shares over which each reporting person can vote jointly

Sole dispositive power 0 shares Shares each reporting person can solely dispose of

Shared dispositive power 0 shares Shares each reporting person can dispose of jointly

Key Terms

beneficial owner, Sole Voting Power, Shared Dispositive Power, Percent of class, +1 more

5 terms

beneficial owner regulatory

"the beneficial owner of the shares of Common Stock reported herein"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

Sole Voting Power regulatory

"5 | Sole Voting Power 0.00 6 | Shared Voting Power 0.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Shared Dispositive Power regulatory

"8 | Shared Dispositive Power 0.00 9 0.00"

Percent of class regulatory

"(b) | Percent of class: 0 %"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

Reporting Persons regulatory

"The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons.""

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

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Available on EDGAR 08/04/2026 - 04:05 PM Accepted by SEC EDGAR 08/04/2026 - 04:03 PM Learn about SEC filing dates

FAQ

What does the latest Schedule 13G/A for RLYB report about Laurion Capital’s holdings?

The amended Schedule 13G shows Laurion Capital Management LP and related reporting persons beneficially own 0 Rallybio shares, representing 0% of the common stock, with no voting or dispositive power over any shares.

Who are the reporting persons in Rallybio (RLYB) Laurion Capital’s Schedule 13G/A?

The reporting persons are Laurion Capital Management LP, and its co-managing members Benjamin Alexander Smith and Janaka Sheehan Maduraperuma, each reporting beneficial ownership of 0 Rallybio shares and 0% of the class.

What percentage of Rallybio (RLYB) common stock does Laurion Capital report owning?

Laurion Capital and the individual reporting persons each report beneficial ownership of 0% of Rallybio’s common stock, with 0 shares held and no sole or shared voting or dispositive power.

Does Laurion Capital have any voting power in Rallybio (RLYB) according to this 13G/A?

No. Laurion Capital and the other reporting persons disclose 0 shares over which they have sole or shared power to vote or direct the vote, indicating no current voting power in Rallybio.

What does 'Ownership of 5 percent or less of a class' mean for Rallybio (RLYB)?

The filing’s Item 5 indicates the reporting persons now have ownership of 5 percent or less of Rallybio’s common stock. In this case, they specifically report 0 shares and 0% of the class.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Rallybio Corp

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

75120L209

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 75120L209

1

Names of Reporting Persons

Laurion Capital Management LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

IA, PN

SCHEDULE 13G

CUSIP Number(s): 75120L209

1

Names of Reporting Persons

Benjamin Alexander Smith

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

CUSIP Number(s): 75120L209

1

Names of Reporting Persons

Janaka Sheehan Maduraperuma

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED KINGDOM

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Rallybio Corp
(b)	Address of issuer's principal executive offices: 234 CHURCH STREET, SUITE 1020, NEW HAVEN, CONNECTICUT 06510
Item 2.
(a)	Name of person filing: This statement is filed by: (i) Laurion Capital Management LP ("Laurion Capital"), a Delaware limited partnership, and the investment adviser to certain funds and accounts (the "Laurion Funds"), with respect to the shares of Common Stock (as defined in Item 2(d) below) directly held by the Laurion Funds; (ii) Mr. Benjamin Alexander Smith ("Mr. Smith"), the co-managing member of Laurion Capital GP LLC, the general partner of Laurion Capital, with respect to the shares of Common Stock directly held by the Laurion Funds. (iii) Mr. Janaka Sheehan Maduraperuma ("Mr. Maduraperuma"), the co-managing member of Laurion Capital GP LLC, the general partner of Laurion Capital, with respect to the shares of Common Stock directly held by the Laurion Funds. The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons." The filing of this statement should not be construed as an admission that any of the forgoing persons or any Reporting Person is, for the the purposes of Section 13 of the Act, the beneficial owner of the shares of Common Stock reported herein.
(b)	Address or principal business office or, if none, residence: The address of the business office of each of the Reporting Persons is 360 Madison Avenue, Suite 1900, New York, NY 10017.
(c)	Citizenship: Laurion Capital is a Delaware limited partnership. Mr. Smith is a citizen of the United States. Mr. Maduraperuma is a citizen of the United Kingdom.
(d)	Title of class of securities: Common Stock, par value $0.0001 per share
(e)	CUSIP No.: 75120L209
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 0
(b)	Percent of class: 0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Laurion Capital Management LP - 0 Benjamin Alexander Smith - 0 Janaka Sheehan Maduraperuma - 0
	(ii) Shared power to vote or to direct the vote: Laurion Capital Management LP - 0 Benjamin Alexander Smith - 0 Janaka Sheehan Maduraperuma - 0
	(iii) Sole power to dispose or to direct the disposition of: Laurion Capital Management LP - 0 Benjamin Alexander Smith - 0 Janaka Sheehan Maduraperuma - 0
	(iv) Shared power to dispose or to direct the disposition of: Laurion Capital Management LP - 0 Benjamin Alexander Smith - 0 Janaka Sheehan Maduraperuma - 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Item 2(a) and Item 3
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Laurion Capital Management LP

Signature:	Jason Riesel
Name/Title:	Jason Riesel, General Counsel & CCO
Date:	08/04/2026

Benjamin Alexander Smith

Signature:	Benjamin Alexander Smith
Name/Title:	Benjamin Alexander Smith
Date:	08/04/2026

Janaka Sheehan Maduraperuma

Signature:	Janaka Sheehan Maduraperuma
Name/Title:	Janaka Sheehan Maduraperuma
Date:	08/04/2026