Organization · Venture Capital
EcoR1 Capital, LLC
EcoR1 Capital, LLC is a San Francisco-based investment firm specializing in the biotechnology sector, focusing on innovative therapeutics. It operates as a crossover fund, investing in both late-stage private rounds and public equity.
Overview
What EcoR1 Capital, LLC does
What EcoR1 Capital, LLC is
EcoR1 Capital, LLC is a San Francisco-based investment firm specializing in the biotechnology sector, focusing on innovative therapeutics. It operates as a crossover fund, investing in both late-stage private rounds and public equity.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Venture Capital
- Founded
- Founded in 2012
- Approximate age
- About 14 years
- Structured capabilities
- Funder
- Last reviewed
- April 10, 2026
Official channels
Find EcoR1 Capital, LLC elsewhere
Open the official website or a supported primary organization account.
Capability profile
EcoR1 Capital, LLC as a funder
Investment thesis
EcoR1 Capital focuses on investing in biotechnology companies developing innovative therapeutics aimed at improving patient outcomes. The firm emphasizes long-term partnerships with entrepreneurs committed to advancing therapeutic innovation.
Focus narrative
EcoR1 Capital invests primarily in the biotechnology sector, targeting companies engaged in the development of therapeutics for various diseases. The firm seeks to identify and support innovative solutions that can significantly improve patient outcomes.
Value beyond capital
EcoR1 Capital adds value to its portfolio companies through strategic financing, scientific rigor, and a commitment to long-term partnerships. The firm leverages its expertise in the biotechnology sector to support entrepreneurs in navigating the complexities of drug development and commercialization.
Terms and economics
- Typical check
- $1,000,000–$50,000,000
- Sweet spot
- $10,000,000
Focus and fit
- Stages
- Seed · Series A · Series B · Series C · Growth Equity · Pre-IPO
- Regions
- Global · North America
Availability
- Currently deploying
- Yes
Portfolio and track record
- Recorded portfolio count
- 30
Portfolio context
Notable portfolio companies include Accent Therapeutics, which focuses on RNA-targeted therapies; Actio BioSciences, developing novel therapeutics; and Affinia Therapeutics, working on gene therapies. Other significant investments include AlloVir, Akouos, and Arcus Biosciences, among many others, showcasing a diverse range of therapeutic innovations.
Common questions
What to know about EcoR1 Capital, LLC
Upseed classifies EcoR1 Capital, LLC under the Venture Capital organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
April 10, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.