ITEOS THERAPEUTICS, INC.
ITEOS THERAPEUTICS, INC. is a Public Limited Company registered in United States under 001424133, and its current status with Massachusetts Secretary of the Commonwealth is active. The company was incorporated on 4 February 2020 and lists its registered address as United States. 5 shareholders are on record for ITEOS THERAPEUTICS, INC., 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 Massachusetts Secretary of the Commonwealth and was last updated on 3 October 2026.
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Shareholders
5
Five shareholders are currently on record for ITEOS THERAPEUTICS, INC., 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 EcoR1 Capital, LLC, holding 36.6% — the largest recorded stake — followed by Blackrock Inc. at 15.7%; the remaining 3 shareholders shown hold smaller stakes.
The register reports 20 shareholders in total, though only the top 5 by holding are shown in this view.
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 |
|---|---|---|---|
| EcoR1 Capital, LLC | 36.6% | Massachusetts Secretary of the Commonwealth | |
| Blackrock Inc. | 15.7% | Massachusetts Secretary of the Commonwealth | |
| Tang Capital Management, LLC | 13.1% | Massachusetts Secretary of the Commonwealth | |
| Vanguard Group Inc | 5.7% | Massachusetts Secretary of the Commonwealth | |
| Dimensional Fund Advisors LP | 2.9% | Massachusetts Secretary of the Commonwealth |
Officers
5
The Chief Financial Officer of ITEOS THERAPEUTICS, INC. currently on record is Matthew Gall; five officers are currently on record for ITEOS THERAPEUTICS, INC., filed with Massachusetts Secretary of the Commonwealth.
The register reports 22 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at ITEOS THERAPEUTICS, INC. 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
ITEOS THERAPEUTICS, INC. sits 1 level below its ultimate parent, CONCENTRA BIOSCIENCES, LLC. 2 subsidiaries are recorded beneath it, across 1 jurisdiction. The full chain up to CONCENTRA BIOSCIENCES, LLC is derived by walking shareholder filings across jurisdictions; no link in it is independently corroborated by ITEOS THERAPEUTICS, INC.'s own shareholder record. 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 2 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.
CONCENTRA BIOSCIENCES, LLC
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Frequently Asked Questions
Who owns ITEOS THERAPEUTICS, INC.?
Five shareholders are currently on record for ITEOS THERAPEUTICS, INC., 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 EcoR1 Capital, LLC, holding 36.6% — the largest recorded stake — followed by Blackrock Inc. at 15.7%; the remaining 3 shareholders shown hold smaller stakes. 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 ITEOS THERAPEUTICS, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for ITEOS THERAPEUTICS, INC. 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 ITEOS THERAPEUTICS, INC. have on record?
5 shareholders are shown on record for ITEOS THERAPEUTICS, INC.. The register reports 20 in total; only the top 5 by holding are shown here.
What is ITEOS THERAPEUTICS, INC.'s company registration number?
ITEOS THERAPEUTICS, INC.'s registration number is 001424133, filed with Massachusetts Secretary of the Commonwealth in United States. Its current status on the register is active.
Is ITEOS THERAPEUTICS, INC. still an active company?
ITEOS THERAPEUTICS, INC.'s status on Massachusetts Secretary of the Commonwealth is listed as active.
When was ITEOS THERAPEUTICS, INC. incorporated?
ITEOS THERAPEUTICS, INC. was incorporated on 4 February 2020, according to Massachusetts Secretary of the Commonwealth.
What is ITEOS THERAPEUTICS, INC.'s registered address?
The registered address on file for ITEOS THERAPEUTICS, INC. is United States.
What legal structure is ITEOS THERAPEUTICS, INC. registered as?
ITEOS THERAPEUTICS, INC. is registered as a Public Limited Company in United States.
Who are the officers/directors of ITEOS THERAPEUTICS, INC.?
The Chief Financial Officer of ITEOS THERAPEUTICS, INC. currently on record is Matthew Gall; five officers are currently on record for ITEOS THERAPEUTICS, INC., filed with Massachusetts Secretary of the Commonwealth. Management authority at ITEOS THERAPEUTICS, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does ITEOS THERAPEUTICS, INC. have a parent company or subsidiaries?
ITEOS THERAPEUTICS, INC. sits 1 level below its ultimate parent, CONCENTRA BIOSCIENCES, LLC. 2 subsidiaries are recorded beneath it, across 1 jurisdiction. Those 2 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 ITEOS THERAPEUTICS, INC.'s ownership over time?
This profile reflects a point-in-time snapshot from Massachusetts Secretary of the Commonwealth. Zavia's monitoring API can track changes to ITEOS THERAPEUTICS, INC.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access ITEOS THERAPEUTICS, INC.'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 ITEOS THERAPEUTICS, INC.'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 Massachusetts Secretary of the Commonwealth and was last synced on 3 October 2026.