WestRiver Group is a venture capital firm. Based in Seattle, Washington, United States. Among the 8 companies in the known portfolio are Colossal Biosciences, Groopit, Viome, Cheq, Lumen Bioscience and Alladapt Immunotherapeutics.
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Investment focus
Who to pitch at WestRiver Group
WestRiver Group portfolio companies (8)
- Colossal Biosciences
- Groopit
- Viome
- Cheq
- Lumen Bioscience
- Alladapt Immunotherapeutics
- Talespin
- QorusDocs
Co-investors
Funds that share portfolio companies with WestRiver Group.
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About WestRiver Group
The firm's listing covers sectors Consumer, Education, FinTech and Hardware, and focus areas Aerospace, Analytics, Biotech and Cloud Infrastructure; known deals cluster at Growth, Seed and Series B.
The team counts 6 people in our database. Erik Anderson (Founder and CEO), Aaron Vaccaro (Managing Director) and Anthony Bontrager (Managing Director) are shown as the contacts to pitch.
Across the known portfolio, 20 co-investors appear alongside WestRiver Group, including US Innovative Technology, Camino Partners and Wave Digital Assets.
Frequently asked questions
What is WestRiver Group?
WestRiver Group is a venture capital firm based in Seattle, Washington, United States, with a known portfolio of 8 companies. The portfolio comes from public investment records rather than from the firm, so deals that never surfaced publicly are not in it.
What does WestRiver Group invest in?
Listed sectors include Consumer, Education, FinTech and Hardware; listed focus areas include Aerospace, Analytics, Biotech and Cloud Infrastructure. Those tags come from the portfolio attached to the firm, so they describe what has been backed rather than a stated mandate for what comes next.
What stage does WestRiver Group invest at?
The known deals of WestRiver Group include Growth, Seed and Series B rounds. Check that against your own round before reaching out: stage mismatch is the most common reason a well matched sector still goes nowhere.
Who should I pitch at WestRiver Group?
3 of the 6 people on file at WestRiver Group are listed as contacts for the firm. All 6 have their own profile page.
How do I contact WestRiver Group?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 6 people attached to the firm have their own pages, each showing whether an address is on file for them.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal