RALLYBIO CORPORATION
RALLYBIO CORPORATION is a registered legal entity registered in United States under 7965510, and its current status with Delaware Division of Corporations is active. The company was incorporated on 5 November 2020 and lists its registered address as United States. 2 shareholders are on record for RALLYBIO CORPORATION, and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from Delaware Division of Corporations and was last updated on 5 October 2026.
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Shareholders
2
Two shareholders are currently on record for RALLYBIO CORPORATION, reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing.
The largest of these is Vanguard Group Inc, holding 3.9% — the largest recorded stake — followed by Tekla Healthcare Investors at 2.8%.
Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Vanguard Group Inc | 3.9% | Delaware Division of Corporations | |
| Tekla Healthcare Investors | 2.8% | Delaware Division of Corporations |
Officers
4
Four officers are currently on record for RALLYBIO CORPORATION, filed with Delaware Division of Corporations. Martin W. Mackay Ph.d. serves as Co-founder & Executive Chairman; Stephen Uden M.b, M.d. serves as Co-founder, President, Ceo & Director; Jonathan I. Lieber M.b.a. serves as Cfo & Treasurer; Steven W. Ryder F.a.c.p, M.d. serves as Chief Medical Officer.
Management authority at RALLYBIO CORPORATION sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Group Structure
RALLYBIO CORPORATION has no recorded parent company — it sits at the top of its own group structure, with 3 subsidiaries recorded beneath it across 1 jurisdiction. Each of these downward relationships is derived rather than filed: resolved by matching entities across the registry network, not stated directly in a single document.
Those 3 subsidiaries span United States jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear.
RALLYBIO CORPORATION
United States
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Frequently Asked Questions
Who owns RALLYBIO CORPORATION?
Two shareholders are currently on record for RALLYBIO CORPORATION, reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is Vanguard Group Inc, holding 3.9% — the largest recorded stake — followed by Tekla Healthcare Investors at 2.8%. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is RALLYBIO CORPORATION's UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for RALLYBIO CORPORATION is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does RALLYBIO CORPORATION have on record?
2 shareholders are shown on record for RALLYBIO CORPORATION.
What is RALLYBIO CORPORATION's company registration number?
RALLYBIO CORPORATION's registration number is 7965510, filed with Delaware Division of Corporations in United States. Its current status on the register is active.
Is RALLYBIO CORPORATION still an active company?
RALLYBIO CORPORATION's status on Delaware Division of Corporations is listed as active.
When was RALLYBIO CORPORATION incorporated?
RALLYBIO CORPORATION was incorporated on 5 November 2020, according to Delaware Division of Corporations.
What is RALLYBIO CORPORATION's registered address?
The registered address on file for RALLYBIO CORPORATION is United States.
Who are the officers/directors of RALLYBIO CORPORATION?
Four officers are currently on record for RALLYBIO CORPORATION, filed with Delaware Division of Corporations. Martin W. Mackay Ph.d. serves as Co-founder & Executive Chairman; Stephen Uden M.b, M.d. serves as Co-founder, President, Ceo & Director; Jonathan I. Lieber M.b.a. serves as Cfo & Treasurer; Steven W. Ryder F.a.c.p, M.d. serves as Chief Medical Officer. Management authority at RALLYBIO CORPORATION sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does RALLYBIO CORPORATION have a parent company or subsidiaries?
RALLYBIO CORPORATION has no recorded parent company — it sits at the top of its own group structure, with 3 subsidiaries recorded beneath it across 1 jurisdiction. Those 3 subsidiaries span United States jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear.
Can Zavia monitor changes to RALLYBIO CORPORATION's ownership over time?
This profile reflects a point-in-time snapshot from Delaware Division of Corporations. Zavia's monitoring API can track changes to RALLYBIO CORPORATION's registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access RALLYBIO CORPORATION's data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United States, so records like RALLYBIO CORPORATION's registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Delaware Division of Corporations and was last synced on 5 October 2026.