William Blair is a private equity firm and venture debt provider. Based in Chicago, Illinois, United States. The known portfolio counts 8 companies, including Prime Trust, Inuvo, Xan3D Technologies, Halo Investing, HouseValues and Athersys.
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Investment focus
Contacts
Who to pitch at William Blair
William Blair portfolio companies (8)
- Prime Trust
- Inuvo
- Xan3D Technologies
- Halo Investing
- HouseValues
- Athersys
- NuVasive
- TargeGen
Co-investors
Funds that share portfolio companies with William Blair.
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About William Blair
The firm's listing covers sectors FinTech, Hardware and Healthcare, and focus areas Biotech, Crypto, Healthcare Operations and MedTech; known deals cluster at Growth, Late-Stage and Seed.
Of the 11 people on file at William Blair, Tom Lewis (Managing Director), Evan Kornack (Managing Director) and Jeff Hypes (Managing Director) are listed as the contacts to approach first.
Across the known portfolio, 14 co-investors appear alongside William Blair, including Fin Capital, Gatecap Ventures and Nationwide.
Frequently asked questions
What is William Blair?
William Blair is a private equity firm and venture debt provider based in Chicago, Illinois, 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 William Blair invest in?
Listed sectors include FinTech, Hardware and Healthcare; listed focus areas include Biotech, Crypto, Healthcare Operations and MedTech. 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 William Blair invest at?
The known deals of William Blair include Growth, Late-Stage and Seed 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 William Blair?
3 of the 11 people on file at William Blair are listed as contacts for the firm. All 11 have their own profile page.
How do I contact William Blair?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 11 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