Rallybio Corp ownership disclosure: reporting persons from Balyasny report beneficial ownership of 376,573 shares of Rallybio common stock, representing approximately 7.12% of the class based on 5,289,675 shares outstanding as of March 6, 2026. The shares are held directly by Atlas Diversified Master Fund, Ltd. (ADMF); Balyasny entities and Dmitry Balyasny state they may be deemed to beneficially own the shares by virtue of their management and GP/member roles. The principal business address for the reporting persons is 444 West Lake Street, Chicago, IL.
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Insights
Large hedge fund affiliate holds roughly 7.12% of Rallybio.
Balyasny Asset Management and affiliated entities report beneficial ownership of 376,573 shares, equal to 7.12% of the 5,289,675 shares outstanding cited as of March 6, 2026. The shares are held by ADMF, of which BAM is the investment manager.
Filing shows typical ownership structure: manager, GP, holding entities, and the individual managing member. Subsequent filings could disclose changes in position or voting arrangements, but timing and any trading intentions are not stated in the excerpt.
Disclosure clarifies voting and dispositive powers across related entities.
The statement attributes sole voting and dispositive power over the 376,573 shares to the reporting entities, and explains the chain: BAM (investment manager) → BAM GP (general partner) → BAM Holdings → Dames → Mr. Balyasny.
This is a standard Schedule 13G ownership filing that documents beneficial ownership and control paths; it does not state any transaction activity or trading intent.
Key Figures
Shares held by ADMF:376,573 sharesPercent of class:7.12%Shares outstanding (base):5,289,675 shares
3 metrics
Shares held by ADMF376,573 sharesheld directly by Atlas Diversified Master Fund, Ltd.
Percent of class7.12%based on 5,289,675 shares outstanding as of March 6, 2026
Shares outstanding (base)5,289,675 sharesoutstanding as of March 6, 2026 (source: issuer 10-K cited in filing)
Key Terms
Schedule 13G, Beneficial ownership, Dispositive Power
3 terms
Schedule 13Gregulatory
"This statement is being filed by (1) Balyasny Asset Management L.P."
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
Beneficial ownershipregulatory
"may be deemed to beneficially own such Shares"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Dispositive Powerlegal
"Sole Dispositive Power 376,573.00"
Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Rallybio Corp
(Name of Issuer)
Common Stock, par value $0.001 per share
(Title of Class of Securities)
75120L209
(CUSIP Number)
03/31/2026
(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
Balyasny Asset Management L.P.
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
376,573.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
376,573.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
376,573.00
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)
7.12 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP Number(s):
75120L209
1
Names of Reporting Persons
BAM GP LLC
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
376,573.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
376,573.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
376,573.00
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)
7.12 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
75120L209
1
Names of Reporting Persons
Balyasny Asset Management Holdings 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
376,573.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
376,573.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
376,573.00
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)
7.12 %
12
Type of Reporting Person (See Instructions)
HC, PN
SCHEDULE 13G
CUSIP Number(s):
75120L209
1
Names of Reporting Persons
Dames GP LLC
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
376,573.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
376,573.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
376,573.00
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)
7.12 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
75120L209
1
Names of Reporting Persons
Dmitry Balyasny
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
376,573.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
376,573.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
376,573.00
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)
7.12 %
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, CT 06510
Item 2.
(a)
Name of person filing:
This statement is being filed by (1) Balyasny Asset Management L.P., a Delaware limited partnership ("BAM"), (2) BAM GP LLC, a Delaware limited liability company ("BAM GP"), (3) Balyasny Asset Management Holdings LP, a Delaware limited partnership ("BAM Holdings"), (4) Dames GP LLC, a Delaware limited liability company ("Dames"), and (5) Dmitry Balyasny, a United States citizen (collectively, the "Reporting Persons"). BAM GP is the General Partner of BAM. BAM Holdings is the Sole Member of BAM GP. Dames is the General Partner of BAM Holdings. Dmitry Balyasny is the Managing Member of Dames.
(b)
Address or principal business office or, if none, residence:
The principal business address of each of BAM, BAM GP, BAM Holdings, Dames, and Mr. Balyasny is located at 444 West Lake Street, 50th Floor, Chicago, IL 60606.
(c)
Citizenship:
(1) BAM is a Delaware limited partnership, (2) BAM GP is a Delaware limited liability company, (3) BAM Holdings is a Delaware limited partnership, (4) Dames is a Delaware limited liability company, and (5) Mr. Balyasny is a United States citizen.
(d)
Title of class of securities:
Common Stock, par value $0.001 per share
(e)
CUSIP Number(s):
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:
By virtue of its position as the investment manager of Atlas Diversified Master Fund, Ltd. ("ADMF"), the direct holder of the 376,573 shares of common stock, par value $0.001 per share ("Shares"), reported herein, BAM may be deemed to exercise voting and investment power over such Shares held by ADMF and thus may be deemed to beneficially own such Shares. By virtue of its position as the General Partner of BAM, BAM GP may be deemed to exercise voting and investment power over the Shares held directly by ADMF and thus may be deemed to beneficially own such Shares. By virtue of its position as the Sole Member of BAM GP, BAM Holdings may be deemed to exercise voting and investment power over the Shares held directly by ADMF and thus may be deemed to beneficially own such Shares. By virtue of its position as the General Partner of BAM Holdings, Dames may be deemed to exercise voting and investment power over the Shares held directly by ADMF and thus may be deemed to beneficially own such Shares. By virtue of his position as the Managing Member of Dames, Mr. Balyasny may be deemed to exercise voting and investment power over the Shares held directly by ADMF and thus may be deemed to beneficially own such Shares.
(b)
Percent of class:
Each of the Reporting Persons may be deemed to be the beneficial owner of approximately 7.12% of the Shares, based on 5,289,675 Shares outstanding as of March 6, 2026, as reported in the Issuer's annual report on form 10-K filed with the Securities and Exchange Commission on March 16, 2026.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
Each of the Reporting Persons has the sole power to vote or to direct the vote of 376,573 shares.
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
Each of the Reporting Persons has the sole power to vote or to direct the vote of 376,573 shares.
(iv) Shared power to dispose or to direct the disposition of:
0
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
ADMF, a Cayman Islands exempted company that is an investment management client of BAM, has the right to receive dividends from, or the proceeds from the sale of, the reported securities.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
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.
What stake did Balyasny report in Rallybio (RLYB)?
Balyasny entities reported beneficial ownership of 376,573 shares, approximately 7.12%. The percentage is calculated using 5,289,675 shares outstanding as of March 6, 2026, per the filing.
Who legally holds the 376,573 Rallybio shares reported?
The shares are held directly by Atlas Diversified Master Fund, Ltd. (ADMF). Balyasny entities state they may be deemed beneficial owners due to management and GP/member roles over ADMF.
Do the filers state voting or dispositive power over the shares?
Yes. The filing states the reporting persons have sole voting and sole dispositive power over the 376,573 shares, as reflected in the ownership table in the statement.
Does the Schedule 13G show any trades or intentions to trade?
No. The filing documents beneficial ownership and control relationships; it does not disclose any purchase, sale, or trading intentions or timing in the provided excerpt.
