BOUNDLESS BIO, INC.
BOUNDLESS BIO, INC. is a registered legal entity registered in United States under 4187720, and its current status with California Secretary of State — bizfile Online is active. The company was incorporated on 23 August 2018 and lists its registered address as United States. 3 shareholders are on record for BOUNDLESS BIO, 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 21 October 2026.
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Shareholders
3
Three shareholders are currently on record for BOUNDLESS BIO, INC., reflecting the stock ledger kept by the company 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 6.3% — the largest recorded stake — followed by Fidelity Securities Fund-Fidelity Small Cap Growth Fund at 0.8%; the remaining 1 shareholder shown holds 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.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Vanguard Group Inc | 6.3% | California Secretary of State — bizfile Online | |
| Fidelity Securities Fund-Fidelity Small Cap Growth Fund | 0.8% | California Secretary of State — bizfile Online | |
| iShares Trust-iShares Micro-Cap ETF | 0.4% | California Secretary of State — bizfile Online |
Officers
5
The Ceo, President & Director of BOUNDLESS BIO, INC. currently on record is ZACHARY HORNBY; five officers are currently on record for BOUNDLESS BIO, INC., filed with California Secretary of State — bizfile Online.
The register reports 34 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at BOUNDLESS BIO, 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.
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Frequently Asked Questions
Who owns BOUNDLESS BIO, INC.?
Three shareholders are currently on record for BOUNDLESS BIO, INC., reflecting the stock ledger kept by the company 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 6.3% — the largest recorded stake — followed by Fidelity Securities Fund-Fidelity Small Cap Growth Fund at 0.8%; the remaining 1 shareholder shown holds 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 BOUNDLESS BIO, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for BOUNDLESS BIO, 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 BOUNDLESS BIO, INC. have on record?
3 shareholders are shown on record for BOUNDLESS BIO, INC..
What is BOUNDLESS BIO, INC.'s company registration number?
BOUNDLESS BIO, INC.'s registration number is 4187720, filed with California Secretary of State — bizfile Online in United States. Its current status on the register is active.
Is BOUNDLESS BIO, INC. still an active company?
BOUNDLESS BIO, INC.'s status on California Secretary of State — bizfile Online is listed as active.
When was BOUNDLESS BIO, INC. incorporated?
BOUNDLESS BIO, INC. was incorporated on 23 August 2018, according to California Secretary of State — bizfile Online.
What is BOUNDLESS BIO, INC.'s registered address?
The registered address on file for BOUNDLESS BIO, INC. is United States.
Who are the officers/directors of BOUNDLESS BIO, INC.?
The Ceo, President & Director of BOUNDLESS BIO, INC. currently on record is ZACHARY HORNBY; five officers are currently on record for BOUNDLESS BIO, INC., filed with California Secretary of State — bizfile Online. Management authority at BOUNDLESS BIO, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Can Zavia monitor changes to BOUNDLESS BIO, 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 BOUNDLESS BIO, 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 BOUNDLESS BIO, 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 BOUNDLESS BIO, 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 21 October 2026.