ALECTOR, INC.
ALECTOR, INC. is a registered legal entity registered in United States under 4079208, and its current status with California Secretary of State — bizfile Online is active. The company was incorporated on 30 October 2017 and lists its registered address as SOUTH SAN FRANCISCO, United States. 3 shareholders are on record for ALECTOR, 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 18 September 2026.
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Shareholders
3
Shareholders of ALECTOR, INC.
Three shareholders are currently on record for ALECTOR, 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 11.2% — the largest recorded stake — followed by Fidelity Salem Street Trust-Fidelity Small Cap Index Fund at 1.2%; 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 | 11.2% | California Secretary of State — bizfile Online | |
| Fidelity Salem Street Trust-Fidelity Small Cap Index Fund | 1.2% | California Secretary of State — bizfile Online | |
| BlackRock Funds-BlackRock Advantage Small Cap Core Fund | 1% | California Secretary of State — bizfile Online |
Officers
19
Directors and officers of ALECTOR, INC.
The Co-founder, Ceo & Director of ALECTOR, INC. currently on record is Arnon Rosenthal Ph.d.; 19 officers are currently on record for ALECTOR, INC., filed with California Secretary of State — bizfile Online. Management authority at ALECTOR, 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
Group structure of ALECTOR, INC.
ALECTOR, 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.
- Alector LLC (United States)
Data availability
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.
ALECTOR, INC.
United States
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Frequently Asked Questions
Who owns ALECTOR, INC.?
Three shareholders are currently on record for ALECTOR, 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 11.2% — the largest recorded stake — followed by Fidelity Salem Street Trust-Fidelity Small Cap Index Fund at 1.2%; 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 ALECTOR, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for ALECTOR, 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 ALECTOR, INC. have on record?
3 shareholders are shown on record for ALECTOR, INC..
What is ALECTOR, INC.'s company registration number?
ALECTOR, INC.'s registration number is 4079208, filed with California Secretary of State — bizfile Online in United States. Its current status on the register is active.
Is ALECTOR, INC. still an active company?
ALECTOR, INC.'s status on California Secretary of State — bizfile Online is listed as active.
When was ALECTOR, INC. incorporated?
ALECTOR, INC. was incorporated on 30 October 2017, according to California Secretary of State — bizfile Online.
What is ALECTOR, INC.'s registered address?
The registered address on file for ALECTOR, INC. is SOUTH SAN FRANCISCO, United States.
Who are the officers/directors of ALECTOR, INC.?
The Co-founder, Ceo & Director of ALECTOR, INC. currently on record is Arnon Rosenthal Ph.d.; 19 officers are currently on record for ALECTOR, INC., filed with California Secretary of State — bizfile Online. Management authority at ALECTOR, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does ALECTOR, INC. have a parent company or subsidiaries?
ALECTOR, 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 ALECTOR, 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 ALECTOR, 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 ALECTOR, 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 ALECTOR, 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 18 September 2026.