William Sorin, Principal at Audax Private Equity is an active investor based in Boston, Massachusetts. This profile covers what William Sorin backs, at which stage, and how founders can reach out in 2026.
Principal at Audax Private Equity.
William Sorin invests in SaaS & Enterprise and Manufacturing & Industrial, typically at Late Stage Venture.
- Investor type
- PE
- Stages
- Late Stage Venture
- Invests in
- SaaS & EnterpriseManufacturing & Industrial
- Location
- Boston, Massachusetts
- Typical check
- $7M
How to reach William Sorin
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Round Funded. "William Sorin." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/william-sorin
Frequently Asked Questions
Who is William Sorin?
William Sorin, Principal at Audax Private Equity is an active investor based in Boston, Massachusetts. William Sorin invests in SaaS & Enterprise and Manufacturing & Industrial, typically at Late Stage Venture.
What does William Sorin invest in?
William Sorin invests in SaaS & Enterprise and Manufacturing & Industrial, typically at Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does William Sorin invest at?
William Sorin typically invests at Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is William Sorin's typical check size?
William Sorin typically writes checks around $7M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.