ONCTERNAL THERAPEUTICS, INC.
ONCTERNAL THERAPEUTICS, INC. is a registered legal entity registered in United States under 4286626, and its current status with California Secretary of State — bizfile Online is active. The company was incorporated on 10 June 2019 and lists its registered address as SAN DIEGO, United States. 5 shareholders are on record for ONCTERNAL 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 California Secretary of State — bizfile Online and was last updated on 5 October 2026.
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Shareholders
5
Five shareholders are currently on record for ONCTERNAL 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 Vanguard Group Inc, holding 25.5% — the largest recorded stake — followed by Vanguard Total Stock Market Index Fund at 19.3%; 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 |
|---|---|---|---|
| Vanguard Group Inc | 25.5% | California Secretary of State — bizfile Online | |
| Vanguard Total Stock Market Index Fund | 19.3% | California Secretary of State — bizfile Online | |
| Millennium Management Llc | 14.7% | California Secretary of State — bizfile Online | |
| Blackrock Inc. | 7% | California Secretary of State — bizfile Online | |
| Vanguard Extended Market Index Fund | 5.5% | California Secretary of State — bizfile Online |
Officers
5
The President, Ceo & Director of ONCTERNAL THERAPEUTICS, INC. currently on record is James B. Breitmeyer M.d., Ph.d.; five officers are currently on record for ONCTERNAL THERAPEUTICS, INC., filed with California Secretary of State — bizfile Online.
The register reports 12 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at ONCTERNAL 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
ONCTERNAL THERAPEUTICS, INC. has no recorded parent company — it sits at the top of its own group structure, with 1 subsidiary 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 1 subsidiary spans 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.
ONCTERNAL THERAPEUTICS, INC.
United States
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Frequently Asked Questions
Who owns ONCTERNAL THERAPEUTICS, INC.?
Five shareholders are currently on record for ONCTERNAL 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 Vanguard Group Inc, holding 25.5% — the largest recorded stake — followed by Vanguard Total Stock Market Index Fund at 19.3%; 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 ONCTERNAL THERAPEUTICS, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for ONCTERNAL 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 ONCTERNAL THERAPEUTICS, INC. have on record?
5 shareholders are shown on record for ONCTERNAL THERAPEUTICS, INC.. The register reports 20 in total; only the top 5 by holding are shown here.
What is ONCTERNAL THERAPEUTICS, INC.'s company registration number?
ONCTERNAL THERAPEUTICS, INC.'s registration number is 4286626, filed with California Secretary of State — bizfile Online in United States. Its current status on the register is active.
Is ONCTERNAL THERAPEUTICS, INC. still an active company?
ONCTERNAL THERAPEUTICS, INC.'s status on California Secretary of State — bizfile Online is listed as active.
When was ONCTERNAL THERAPEUTICS, INC. incorporated?
ONCTERNAL THERAPEUTICS, INC. was incorporated on 10 June 2019, according to California Secretary of State — bizfile Online.
What is ONCTERNAL THERAPEUTICS, INC.'s registered address?
The registered address on file for ONCTERNAL THERAPEUTICS, INC. is SAN DIEGO, United States.
Who are the officers/directors of ONCTERNAL THERAPEUTICS, INC.?
The President, Ceo & Director of ONCTERNAL THERAPEUTICS, INC. currently on record is James B. Breitmeyer M.d., Ph.d.; five officers are currently on record for ONCTERNAL THERAPEUTICS, INC., filed with California Secretary of State — bizfile Online. Management authority at ONCTERNAL THERAPEUTICS, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does ONCTERNAL THERAPEUTICS, INC. have a parent company or subsidiaries?
ONCTERNAL THERAPEUTICS, INC. has no recorded parent company — it sits at the top of its own group structure, with 1 subsidiary recorded beneath it across 1 jurisdiction. Those 1 subsidiary spans 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 ONCTERNAL THERAPEUTICS, INC.'s ownership over time?
This profile reflects a point-in-time snapshot from California Secretary of State — bizfile Online. Zavia's monitoring API can track changes to ONCTERNAL 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 ONCTERNAL 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 ONCTERNAL 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 California Secretary of State — bizfile Online and was last synced on 5 October 2026.