---
title: "Alector, Inc. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/39aa5ecb-dfad-52e0-99bd-faeeed41c794
json: https://whiteintel.dev/api/public/dossier/39aa5ecb-dfad-52e0-99bd-faeeed41c794
identifier: sec:0001653087
jurisdiction: US
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# Alector, Inc.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001653087`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/39aa5ecb-dfad-52e0-99bd-faeeed41c794  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/39aa5ecb-dfad-52e0-99bd-faeeed41c794  

## Ownership & control

### Owners / controllers

- **POLARIS VENTURE MANAGEMENT CO. VI, L.L.C.** (tenpercentowner) — https://whiteintel.dev/entity/518ebef1-0200-5909-aace-27e0b024ab02
- **POLARIS VENTURE PARTNERS FOUNDERS' FUND VI, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/adfde6ca-c8b1-52fb-afc3-2e3ef62bf303
- **POLARIS VENTURE PARTNERS VI (AIV), L.P.** (tenpercentowner) — https://whiteintel.dev/entity/0de5db05-f606-5b8e-a8b0-7cdd0e2ec05c
- **POLARIS VENTURE PARTNERS VI, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/7db5a83b-61d8-5f6d-a957-fafb277420ef
- **POLARIS VENTURE PARTNERS VI (AIV-B), L.P.** (tenpercentowner) — https://whiteintel.dev/entity/ff2ebfa5-253b-5919-b1e8-000b85ecab05
- **MCGUIRE TERRANCE** (tenpercentowner) — https://whiteintel.dev/entity/11ad993b-f7e2-5ee4-aa7b-888df479cafe
- **ORBIMED ADVISORS LLC** (tenpercentowner) — https://whiteintel.dev/entity/4fe8d3ec-3487-5b04-877d-c8ddaf0718be
- **ORBIMED CAPITAL GP IV LLC** (tenpercentowner) — https://whiteintel.dev/entity/3062f563-7e06-5569-a041-557da45428a4
- **ORBIMED CAPITAL LLC** (tenpercentowner) — https://whiteintel.dev/entity/561327d8-69e5-5ce8-a5e6-63690a1605ff
- **GORDON CARL L** (tenpercentowner) — https://whiteintel.dev/entity/f66dc571-93f9-5939-b406-a01b6c73b2c8

### UBO chain (walk to the ultimate owner)

A **41-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Alector, Inc.**. Human view: https://whiteintel.dev/entity/39aa5ecb-dfad-52e0-99bd-faeeed41c794 · Structured JSON: https://whiteintel.dev/api/public/dossier/39aa5ecb-dfad-52e0-99bd-faeeed41c794._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._