Alector LLC Layoff — December 2025
SOURCEOFFICIAL FILINGCalifornia Employment Development Department· filed October 21, 2025View the filing ↗
What we know
Location: South San Francisco, CA (San Mateo County).
A WARN notice for this layoff is recorded on October 21, 2025.
Disclosed through an official WARN filing with the CA state workforce agency.
Summary
Alector LLC disclosed this layoff in an official WARN (Worker Adjustment and Retraining Notification) notice recorded by the CA state workforce agency on October 21, 2025. The notice covers 75 employees in South San Francisco, CA (San Mateo County), with the layoff effective December 22, 2025.
That is roughly 55.6% of the 135 people Alector LLC employs.
LayoffTalk has tracked 4 layoff events at Alector LLC since March 2025, including 75 jobs documented in official WARN filings, with 3 additional events known from news reporting.
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