How Many People Work at Alector? Headcount and Employee Trends

Alector is a biotechnology company with a workforce of 206 employees. Reported new hires total 6 and attrition is 24. The team spans engineering, healthcare, business management, operations, finance and administration, human resources, sales and support, legal, and compliance. Headcount is distributed across multiple U.S. hubs, with the largest concentration in San Francisco.

Engineering is the largest function with 70 employees (about 34% of the company). Healthcare has 29 employees (~14%), and Business Management has 25 (~12%). Operations (19; ~9%), Finance and Administration (16; ~8%), and Human Resources (13; ~6%) follow. Smaller groups include Sales and Support (8), Risk, Safety, and Compliance (6), and Legal (5), with 15 employees categorized as Other.

San Francisco, CA is the largest single location with 83 employees (about 40% of total headcount). Additional Bay Area locations include South San Francisco (22), San Mateo (7), San Jose (5), and Redwood City (3), together representing roughly 58% of the workforce. Other U.S. hubs include San Diego (7), Los Angeles (3), Philadelphia (3), and Seattle (2). A distributed “Other” category accounts for 71 employees across additional locations.