COMPANY DOSSIER

Alector Layoffs

Yes. Alector filed a WARN notice to cut 75 jobs in South San Francisco, California, with the layoffs effective Dec 22, 2025. It was filed Oct 21, 2025 under the federal WARN Act.

75 roles affected across 1 filing.

Canary status: ListeningEVIDENCE-BASED · NOT A PREDICTION
1 SEC restructuring disclosure (8-K Item 2.05) · 2 executive changes disclosed to the SEC
CanaryWhistle's own assessment, computed from the public filings listed on this page. It is a read of hiring and workforce activity, not a statement about Alector's solvency or creditworthiness. Not a credit rating and not financial advice. See our sources and method.
Corporate signalsSEC · PBGC · PRIMARY SOURCES

Material corporate events on record for Alector, beyond the WARN notice, that fill in the wider story of a company under pressure. Each links to its official source. No other layoff tracker connects these.

Dec 12, 2025Executive ChangeSEC Form 8-K, Item 5.02, filed 2025-12-12 by Alector, Inc. (ALEC).SEC filing →
Oct 21, 2025RestructuringSEC Form 8-K, Item 2.05, filed 2025-10-21 by Alector, Inc. (ALEC).SEC filing →
Oct 21, 2025Executive ChangeSEC Form 8-K, Item 5.02, filed 2025-10-21 by Alector, Inc. (ALEC).SEC filing →
Jun 13, 2025Executive ChangeSEC Form 8-K, Item 5.02, filed 2025-06-13 by Alector, Inc. (ALEC).SEC filing →
Mar 28, 2025Executive ChangeSEC Form 8-K, Item 5.02, filed 2025-03-28 by Alector, Inc. (ALEC).SEC filing →
Mar 10, 2025RestructuringSEC Form 8-K, Item 2.05, filed 2025-03-10 by Alector, Inc. (ALEC).SEC filing →
Nov 25, 2024RestructuringSEC Form 8-K, Item 2.05, filed 2024-11-25 by Alector, Inc. (ALEC).SEC filing →

Every filing

South San Francisco, California
Filed Oct 21, 2025 (9mo ago) · Effective Dec 22, 2025 · official filing →
75
Layoff

Questions

Is Alector laying off employees?

Yes. Alector filed a WARN notice to cut 75 jobs in South San Francisco, California, with the layoffs effective Dec 22, 2025. It was filed Oct 21, 2025 under the federal WARN Act.

How many jobs is Alector cutting?

75 jobs, across 1 official WARN filing.

When do the Alector layoffs take effect?

The filing lists an effective date of Dec 22, 2025. The WARN Act requires roughly 60 days' advance notice, so the filing date precedes the job losses.

Watching Alector?

We'll email you if there are further filings, expansions, or new locations affected.

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