GOSSAMER BIO, INC.
GOSSAMER BIO, INC. is a registered legal entity registered in United States under 4005318, and its current status with California Secretary of State — bizfile Online is active. The company was incorporated on 16 March 2017 and lists its registered address as United States. 5 shareholders are on record for GOSSAMER 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 4 October 2026.
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Shareholders
5
Five shareholders are currently on record for GOSSAMER BIO, 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 10.1% — the largest recorded stake — followed by iShares Trust-iShares Russell 2000 ETF at 3.8%; the remaining 3 shareholders shown hold smaller stakes.
The register reports 7 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 | 10.1% | California Secretary of State — bizfile Online | |
| iShares Trust-iShares Russell 2000 ETF | 3.8% | California Secretary of State — bizfile Online | |
| Fidelity Salem Street Trust-Fidelity Small Cap Index Fund | 1.5% | California Secretary of State — bizfile Online | |
| iShares Trust-iShares Russell 2000 Growth ETF | 1.3% | California Secretary of State — bizfile Online | |
| iShares Trust-iShares Russell 2000 Growth ETF | 1.3% | California Secretary of State — bizfile Online |
Officers
5
The Co-founder, Ceo, President & Chairman of GOSSAMER BIO, INC. currently on record is Faheem Hasnain; five officers are currently on record for GOSSAMER BIO, INC., filed with California Secretary of State — bizfile Online.
The register reports 19 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at GOSSAMER 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.
Group Structure
GOSSAMER BIO, INC. 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.
GOSSAMER BIO, INC.
United States
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Frequently Asked Questions
Who owns GOSSAMER BIO, INC.?
Five shareholders are currently on record for GOSSAMER BIO, 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 10.1% — the largest recorded stake — followed by iShares Trust-iShares Russell 2000 ETF at 3.8%; 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 GOSSAMER BIO, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for GOSSAMER 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 GOSSAMER BIO, INC. have on record?
5 shareholders are shown on record for GOSSAMER BIO, INC.. The register reports 7 in total; only the top 5 by holding are shown here.
What is GOSSAMER BIO, INC.'s company registration number?
GOSSAMER BIO, INC.'s registration number is 4005318, filed with California Secretary of State — bizfile Online in United States. Its current status on the register is active.
Is GOSSAMER BIO, INC. still an active company?
GOSSAMER BIO, INC.'s status on California Secretary of State — bizfile Online is listed as active.
When was GOSSAMER BIO, INC. incorporated?
GOSSAMER BIO, INC. was incorporated on 16 March 2017, according to California Secretary of State — bizfile Online.
What is GOSSAMER BIO, INC.'s registered address?
The registered address on file for GOSSAMER BIO, INC. is United States.
Who are the officers/directors of GOSSAMER BIO, INC.?
The Co-founder, Ceo, President & Chairman of GOSSAMER BIO, INC. currently on record is Faheem Hasnain; five officers are currently on record for GOSSAMER BIO, INC., filed with California Secretary of State — bizfile Online. Management authority at GOSSAMER BIO, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does GOSSAMER BIO, INC. have a parent company or subsidiaries?
GOSSAMER BIO, INC. 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 GOSSAMER 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 GOSSAMER 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 GOSSAMER 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 GOSSAMER 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 4 October 2026.