Form
SCHEDULE 13D/A
Active or control-oriented beneficial ownership filing.
TPG GP A, LLC - 01 Mar 2026 SCHEDULE 13D/A Report for Rallybio Corp Common Stock, par value $0.0001 per share (RLYB)
- Large-stake signal
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Ownership
7.2%Beneficial ownership of this reported class.
Shares
378,551 sharesShares beneficially owned as disclosed.
Event date
01 Mar 2026Date tied to the ownership event or amendment.
Accepted by SEC
03 Mar 2026EDGAR acceptance date.
How to read this large-stake filing
- Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
- Compare this filing with the holder history and issuer page before treating the percentage as a current position.
- Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
- Class ownership
- 7.2%
- Symbol
- RLYB
- Shares outstanding
- 5,257,653 shares
- Form type
- SCHEDULE 13D/A
- Accepted by SEC
- 03 Mar 2026, 16:34:32 UTC
- Event date
- 01 Mar 2026
- SEC filing
- View source filing
Ownership signal
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Subject security
Who this page is about.
2 source fields
Source evidence
Original filing metadata and source links.
4 source fields
Key filing fact
TPG GP A, LLC disclosed 7.2% ownership in Rallybio Corp Common Stock, par value $0.0001 per share (RLYB) on 01 Mar 2026.
Key facts
- TPG GP A, LLC filed SCHEDULE 13D/A for Rallybio Corp Common Stock, par value $0.0001 per share (RLYB).
- Disclosed ownership: 7.2%.
- Date of event: 01 Mar 2026.
Change
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 03 Mar 2026, 16:34.
Research use
- This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
- Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.
Evidence
Backed by Schedule 13D/13G
View source filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Disclosed reporting parties (3)
Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares owned | Sole voting power | Shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| TPG GP A, LLC | 7.2% | 378,551 | 0 | 378,551 | /s/ Martin Davidson | Martin Davidson / Chief Accounting Officer | 0001903793 |
| James G. Coulter | 7.2% | 378,551 | 0 | 378,551 | /s/ Gerald Neugebauer | Gerald Neugebauer, on behalf of James G. Coulter (1) | 0001099776 |
| Jon Winkelried | 7.2% | 378,551 | 0 | 378,551 | /s/ Gerald Neugebauer | Gerald Neugebauer, on behalf of Jon Winkelried (2) | 0001366946 |
CIK / CUSIP context first