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TPG group shows 7.2% Rallybio (RLYB) stake and supports Candid merger

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Form Type
SCHEDULE 13D/A

Rhea-AI Filing Summary

Rallybio Corp received an updated Schedule 13D from TPG-affiliated entities showing continued beneficial ownership of 378,551 shares of common stock, or about 7.2% of the 5,289,675 shares outstanding as of February 26, 2026. The shares are held through The Rise Fund Rascal, L.P., and may be deemed beneficially owned by TPG GP A, LLC, James G. Coulter and Jon Winkelried, who each report no sole voting or dispositive power but shared power over these shares.

The filing explains that on March 1, 2026, Rallybio agreed to acquire Candid Therapeutics, Inc. via a merger in which Candid will become a wholly owned subsidiary. In connection with this merger agreement, Rise Fund Rascal entered into a support agreement committing to vote all of its Rallybio shares in favor of approving the merger and related transactions, vote against competing proposals or third‑party acquisition offers, and refrain from soliciting or negotiating alternative acquisition proposals in its capacity as a stockholder.

The reporting persons state they currently have no additional specific plans relating to corporate actions such as further mergers, asset sales, or board changes, but reserve the right to review their position, suggest changes to Rallybio’s operations, management, or capital structure, and potentially pursue actions that could affect control or ownership structure in the future.

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Insights

TPG reaffirms a 7.2% Rallybio stake and formally supports the planned Candid Therapeutics merger.

The filing clarifies that TPG GP A, LLC and related parties may be deemed to beneficially own 378,551 Rallybio common shares, about 7.2% of the 5,289,675 shares outstanding as of February 26, 2026. These shares are held through The Rise Fund Rascal, L.P., with shared, not sole, voting and dispositive power.

A key element is the Support Agreement tied to the March 1, 2026 merger agreement between Rallybio and Candid Therapeutics. Rise Fund Rascal agrees to vote all of its shares for the merger, against competing or alternative acquisition proposals, and not to solicit or negotiate alternatives. This formalizes backing from a meaningful shareholder block.

The reporting persons also outline a broad range of potential future actions they might consider, from acquiring or disposing of more shares to influencing management, capitalization, or listing status. Actual impact will depend on how the merger progresses and whether these investors later choose to pursue any of the contemplated corporate actions.

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

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FAQ

What ownership stake does TPG report in Rallybio (RLYB)?

TPG-affiliated entities may be deemed to beneficially own 378,551 Rallybio common shares, representing about 7.2% of the 5,289,675 shares outstanding as of February 26, 2026. The stake is held through The Rise Fund Rascal, L.P., with shared voting and dispositive power.

How is TPG’s Rallybio (RLYB) ownership structured in this filing?

The filing states The Rise Fund Rascal, L.P. directly holds 378,551 Rallybio common shares. TPG GP A, LLC exercises control through several affiliated entities, so it and Messrs. Coulter and Winkelried may be deemed beneficial owners, though they disclaim ownership beyond their pecuniary interests.

What merger involving Rallybio (RLYB) is described in this Schedule 13D/A?

On March 1, 2026, Rallybio entered a Merger Agreement with Candid Therapeutics, Inc. and a Rallybio subsidiary. The subsidiary will merge into Candid, leaving Candid as a wholly owned Rallybio subsidiary, subject to approvals described in the agreement.

What commitments did Rise Fund Rascal make regarding the Rallybio (RLYB) and Candid merger?

Rise Fund Rascal signed a Support Agreement to vote all its Rallybio shares for approving the Candid merger and related deals, vote against competing or third-party acquisition proposals, and avoid soliciting or negotiating alternative acquisition proposals as a stockholder.

Do the reporting persons plan further actions affecting Rallybio (RLYB)?

The reporting persons state they currently have no specific additional plans for actions like further mergers, asset sales, or board changes. However, they may later review their position and could pursue various corporate actions described if circumstances change.

How did the filing determine the 7.2% ownership in Rallybio (RLYB)?

The 7.2% beneficial ownership is calculated using 5,289,675 Rallybio common shares outstanding as of February 26, 2026. That share count comes from an Exhibit 2.1 attached to a Rallybio Form 8-K filed with the SEC on March 2, 2026.





Jennifer L. Chu
TPG Inc., 301 Commerce Street, Suite 3300
Fort Worth, TX, 76102
(817) 871-4000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
03/01/2026

(Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).






SCHEDULE 13D




Comment for Type of Reporting Person:
The percentage beneficial ownership set forth in response to Item 13 above is based on a total of 5,289,675 shares of Common Stock (as defined below) outstanding as of February 26, 2026, as set forth in Exhibit 2.1 to the Current Report on Form 8-K filed by the Issuer (as defined below) with the Securities and Exchange Commission (the "Commission") on March 2, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
The percentage beneficial ownership set forth in response to Item 13 above is based on a total of 5,289,675 shares of Common Stock outstanding as of February 26, 2026, as set forth in Exhibit 2.1 to the Current Report on Form 8-K filed by the Issuer with the Commission on March 2, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
The percentage beneficial ownership set forth in response to Item 13 above is based on a total of 5,289,675 shares of Common Stock outstanding as of February 26, 2026, as set forth in Exhibit 2.1 to the Current Report on Form 8-K filed by the Issuer with the Commission on March 2, 2026.


SCHEDULE 13D


TPG GP A, LLC
Signature:/s/ Martin Davidson
Name/Title:Martin Davidson / Chief Accounting Officer
Date:03/03/2026
James G. Coulter
Signature:/s/ Gerald Neugebauer
Name/Title:Gerald Neugebauer, on behalf of James G. Coulter (1)
Date:03/03/2026
Jon Winkelried
Signature:/s/ Gerald Neugebauer
Name/Title:Gerald Neugebauer, on behalf of Jon Winkelried (2)
Date:03/03/2026
Comments accompanying signature:
(1) Gerald Neugebauer is signing on behalf of Mr. Coulter pursuant to an authorization and designation letter dated January 10, 2024, which was previously filed with the Commission as an exhibit to a Form 4 filed by Mr. Coulter on February 7, 2024 (SEC File No. 001-41617). (2) Gerald Neugebauer is signing on behalf of Mr. Winkelried pursuant to an authorization and designation letter dated January 10, 2024, which was previously filed with the Commission as an exhibit to a Form 4 filed by Mr. Winkelried on February 7, 2024 (SEC File No. 001-41617).