---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-122184"
form_type: "8-K"
ticker: "ALEC"
cik: "0001653087"
company_name: "Alector, Inc."
filed_at: "2023-04-27T23:59:59+00:00"
generated_at: "2026-06-16T09:04:10.719160+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Director and Chairperson Tillman Gerngross to resign from Alector's board in June 2023

## Summary
- Gerngross resigns as Board Chairperson effective June 13, 2023, and as director effective June 15, 2023.
- Resignation is for personal reasons; no disagreement with Company's operations, policies, or practices.
- No replacement named; Board will need to fill Chairperson and director vacancies.

## SEC filing metadata
- accession: 0001193125-23-122184
- form_type: 8-K
- ticker: ALEC
- cik: 0001653087
- company_name: Alector, Inc.
- filed_at: 2023-04-27T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1653087/000119312523122184/0001193125-23-122184-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1653087/000119312523122184/d501864d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-122184
- JSON: https://secwatch.observer/filing/0001193125-23-122184.json
- Plain text: https://secwatch.observer/filing/0001193125-23-122184.txt

## Key facts
- Executive change
  Tillman Gerngross resigned as Chairperson at Alector, Inc..
  - Action: resigned
  - Role: Chairperson
  source text: On April 25, 2023, Tillman Gerngross, Ph.D. informed Alector, Inc. (the “Company”) of his resignation as Chairperson of the Company’s board of directors (the “Board”), effective June 13, 2023, and his resignation as a director of the Board, effective June 15, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1653087/000119312523122184/0001193125-23-122184-index.htm
- Executive change
  Tillman Gerngross resigned as Director at Alector, Inc..
  - Action: resigned
  - Role: Director
  source text: On April 25, 2023, Tillman Gerngross, Ph.D. informed Alector, Inc. (the “Company”) of his resignation as Chairperson of the Company’s board of directors (the “Board”), effective June 13, 2023, and his resignation as a director of the Board, effective June 15, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1653087/000119312523122184/0001193125-23-122184-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.