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Alector market cap ALEC

Share price times shares outstanding: what the whole company sells for, since 2019.

Today, Oct 23, 2026
$204.3M
Highest close in our data
$2.9B
Jul 2021

Alector is worth $204.3M at the close on Oct 23, 2026, at $1.83 a share.

That is up 35% over the last year and down 88% over five years.

Its highest close in our data was $2.9B in Jul 2021.

Market cap over time

Open the interactive chart, with overlays and comparisons

Year by year

YearEnd of yearLowHighChange
2026 so far$204.3M$164.3M$283.6M+29%
2025$158.3M$91.2M$336M−9%
2024$174.3M$174.3M$709.5M−74%
2023$671.4M$362.6M$813.8M−12%
2022$763.3M$640.9M$1.5B−55%
2021$1.7B$1.2B$2.9B+40%
2020$1.2B$745.9M$2.6B−1%
2019$1.2B$990.1M$1.4Bn/a

Against its peers

Companies in Healthcare nearest Alector's size, closest first, today.

What the market cap tells you

Share price times shares outstanding: what the whole company sells for today.

Size, not quality. Large caps move slower and are covered more. That is all it tells you.

More on Alector

Valuation data, not investment advice. Prices as of . Reported figures come from the company's filings with the SEC.