ANNEXON, INC.
ANNEXON, INC. is a registered legal entity registered in United States under 3398522, and its current status with California Secretary of State — bizfile Online is active. The company was incorporated on 3 August 2011 and lists its registered address as United States. 3 shareholders are on record for ANNEXON, INC., including at least one natural person recorded as a direct holder; the filing carries no beneficial-ownership flag, so that holder is noted here as a recorded shareholder rather than a confirmed ultimate beneficial owner (UBO). 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
3
Three shareholders are currently on record for ANNEXON, 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 Fidelity Salem Street Trust-Fidelity Small Cap Index Fund, holding 1.3% — the largest recorded stake — followed by Fidelity Rutland Square TRT II-Strategic Advisers U.S. Total Stock Fd. at 1.2%; the remaining 1 shareholder shown holds smaller stakes.
2 shareholders shown are companies, so the ownership chain continues above this level for those holdings; the other 1 is recorded as direct individual holder, though the record carries no UBO/PSC flag confirming beneficial-owner status.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Fidelity Salem Street Trust-Fidelity Small Cap Index Fund | 1.3% | California Secretary of State — bizfile Online | |
| Fidelity Rutland Square TRT II-Strategic Advisers U.S. Total Stock Fd. | 1.2% | California Secretary of State — bizfile Online | |
| Fidelity Concord Street Trust-Fidelity Series Small Cap Core Fund | 1.2% | California Secretary of State — bizfile Online |
Officers
5
The Evp of ANNEXON, INC. currently on record is SANJAY KESWANI; five officers are currently on record for ANNEXON, INC., filed with California Secretary of State — bizfile Online.
The register reports 32 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at ANNEXON, 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
ANNEXON, INC. has no recorded parent company — it sits at the top of its own group structure, with 1 subsidiary recorded beneath it across 2 jurisdictions. 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, Australia jurisdictions, 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.
ANNEXON, INC.
United States
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Frequently Asked Questions
Who owns ANNEXON, INC.?
Three shareholders are currently on record for ANNEXON, 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 Fidelity Salem Street Trust-Fidelity Small Cap Index Fund, holding 1.3% — the largest recorded stake — followed by Fidelity Rutland Square TRT II-Strategic Advisers U.S. Total Stock Fd. at 1.2%; the remaining 1 shareholder shown holds smaller stakes. 2 shareholders shown are companies, so the ownership chain continues above this level for those holdings; the other 1 is recorded as direct individual holder, though the record carries no UBO/PSC flag confirming beneficial-owner status.
Who is ANNEXON, INC.'s UBO (Ultimate Beneficial Owner)?
At least one shareholder recorded for ANNEXON, INC. is a natural person. The record carries no dedicated UBO/PSC flag, so that holder is stated here as a recorded shareholder rather than a confirmed Ultimate Beneficial Owner (UBO).
How many shareholders does ANNEXON, INC. have on record?
3 shareholders are shown on record for ANNEXON, INC..
What is ANNEXON, INC.'s company registration number?
ANNEXON, INC.'s registration number is 3398522, filed with California Secretary of State — bizfile Online in United States. Its current status on the register is active.
Is ANNEXON, INC. still an active company?
ANNEXON, INC.'s status on California Secretary of State — bizfile Online is listed as active.
When was ANNEXON, INC. incorporated?
ANNEXON, INC. was incorporated on 3 August 2011, according to California Secretary of State — bizfile Online.
What is ANNEXON, INC.'s registered address?
The registered address on file for ANNEXON, INC. is United States.
Who are the officers/directors of ANNEXON, INC.?
The Evp of ANNEXON, INC. currently on record is SANJAY KESWANI; five officers are currently on record for ANNEXON, INC., filed with California Secretary of State — bizfile Online. Management authority at ANNEXON, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does ANNEXON, INC. have a parent company or subsidiaries?
ANNEXON, INC. has no recorded parent company — it sits at the top of its own group structure, with 1 subsidiary recorded beneath it across 2 jurisdictions. Those 1 subsidiary spans United States, Australia jurisdictions, 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 ANNEXON, 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 ANNEXON, 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 ANNEXON, 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 ANNEXON, 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.