Sean Armstrong
Managing Principal at Westport Capital Partners LLC
Westport, United States
Sean Armstrong, Managing Principal at Westport Capital Partners LLC is an active investor based in Westport, United States. This profile covers what Sean Armstrong backs, at which stage, and how founders can reach out in 2026.
Managing Principal at Westport Capital Partners LLC and holds the CFA designation.
Sean Armstrong typically invests at Late Stage Venture.
- Investor type
- PE
- Stages
- Late Stage Venture
- Location
- Westport, United States
- Typical check
- $7M
How to reach Sean Armstrong
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Cite this page
Round Funded. "Sean Armstrong." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/sean-armstrong
Frequently Asked Questions
Who is Sean Armstrong?
Sean Armstrong, Managing Principal at Westport Capital Partners LLC is an active investor based in Westport, United States. Sean Armstrong typically invests at Late Stage Venture.
What stage does Sean Armstrong invest at?
Sean Armstrong typically invests at Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Sean Armstrong's typical check size?
Sean Armstrong 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.