Alector was founded by Arnon Rosenthal, Tillman Gerngross, Arnon Rosenthal PhD in 2013.

Who are Alector's investors?

Alector's investors include Foresite Capital, Mission Bay Capital, Mission Biocapital, MRL Ventures Fund, SV Health Investors, Polaris Partners.

How much funding has Alector raised?

Alector has disclosed $32.3M raised across 1 round.

Where is Alector headquartered?

Alector is headquartered in San Francisco, US.

Alector

NASDAQ: ALEC

San Francisco, US · Founded 2013 · Delaware LLC · 131 employees on LinkedIn · 6 known investors

Alector develops therapies targeting neurodegenerative diseases including Alzheimer's, frontotemporal dementia, and Parkinson's disease through protein removal, replacement, and immune cell restoration. The company focuses on patients with neurodegenerative conditions and applies genetics, neuroscience, and immunology to advance new treatments.

AI & Machine Learning Biotech Healthtech Longevity Medical Devices

Founders & leadership

Alector was founded in 2013 by Arnon Rosenthal, Tillman Gerngross, and Arnon Rosenthal PhD.

Arnon RosenthalPh.D.

Tillman GerngrossCo-founder

Arnon Rosenthal PhD inCo-Founder and CEOArnon Rosenthal holds a PhD from the Hebrew University of Jerusalem and previously worked as a scientist and executive staff scientist at Genentech before co-founding Rinat Neuroscience (acquired by Pfizer) and Annexon, where he served as CEO and board chair. He is co-founder and CEO of Alector, a biotechnology company developing microglia immune checkpoint therapies for Alzheimer's and other forms of dementia, and has served as a visiting professor at UCSF's Department of Anatomy.

Board

Carl GordonBoard director

Terry McGuire inBoard directorFounding Partner at Polaris Partners

Investors · 6

Foresite CapitalWest Hollywood

Mission Bay CapitalSan Francisco

Mission BiocapitalSan Francisco · $500K

MRL Ventures FundCambridge · $25M

SV Health InvestorsBoston · $1M – $20M

Polaris PartnersreportedBoston · $500K – $5Mvia Terry McGuire · board

Reported raises · per SEC filings

Form D private placements

$32.3M disclosed across 1 round · 2015

▶$32.3MraisedSep 2015 · 11 investors · Biotechnology

Rule 506(b)

Officers, directors & promoters on the filing

Carl GordonDirector
Tillman GerngrossDirector
Arnon RosenthalExecutive Officer, Director
Terry McGuireDirector

Offering amount: $32.3M
Amount sold: $32.3M
First sale: Sep 2015
Incorporated: Limited Liability Company, Delaware, 2013
Federal exemptions: 06b

Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Founder mafia

2 people who came through Alector went on to found or lead other companies.

Errik AndersonCo-FounderFounded Adimab +3 Sabah OneyChief Business OfficerFounded Vilya +1

Competitors · 2

by search overlap

Seeking Alpha30 shared keywordsSeeking Alpha is a financial research platform offering stock analysis, market news, investment ideas, and quantitative ratings across asset classes, drawing on a large community of contributing analysts. It serves individual and professional investors seeking research and data-driven insight on stocks and markets.

Robinhood29 shared keywordsRobinhood is a financial trading platform that enables users to manage portfolios across stocks, ETFs, cryptocurrencies, options, futures, and prediction markets. The platform serves retail investors with low barriers to entry, offering portfolio management services and market insights.

Companies competing with Alector for the same Google search keywords, organic and paid, via search-intersection analysis.

In the news

Alector (NASDAQ:ALEC) Shares Up 7.9% – What’s Next? - Daily Politicaldailypolitical.com · Jul 2026

Weekly News Roundup | 13 July 2026 | Life Science Daily Newslifesciencedaily.news · Jul 2026

Alector raises $133 million in Series E round for neurology drug development - MedCity Newsmedcitynews.com · Jul 2018

Frequently asked questions

What does Alector do?: Alector develops therapies targeting neurodegenerative diseases including Alzheimer's, frontotemporal dementia, and Parkinson's disease through protein removal, replacement, and immune cell restoration. The company focuses on patients with neurodegenerative conditions and applies genetics, neuroscience, and immunology to advance new treatments.
Who founded Alector?: Alector was founded by Arnon Rosenthal, Tillman Gerngross, Arnon Rosenthal PhD in 2013.
Who are Alector's investors?: Alector's investors include Foresite Capital, Mission Bay Capital, Mission Biocapital, MRL Ventures Fund, SV Health Investors, Polaris Partners.
How much funding has Alector raised?: Alector has disclosed $32.3M raised across 1 round.
Where is Alector headquartered?: Alector is headquartered in San Francisco, US.