Investor profile
Seth Rosen
Private equity, Venture debt & Venture Partner at Western Technology Investment
Seth Rosen is a Venture Partner at Western Technology Investment, whose known portfolio counts 11 companies.
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Investment focus
Contacts
Affiliated funds' portfolios
Venture Partner at Western Technology Investment, whose known portfolio counts 11 companies
- Klar
- Crowded
- Last Energy
- Mesta
- Daisy
- Ava Financial
- Feltsense Holdings
- Accelsius
- Feltsense
- Ascent
- Teiko Bio
Investor Profile
The listing covers sectors AI, Climate, Commerce and Consumer, and focus areas Aerospace, Analytics, Clean Energy and Cloud Infrastructure. Startups operating in these areas may find Seth Rosen relevant.
Stage-wise, the deals at Western Technology Investment cluster around Growth, Late-Stage and Pre-Seed rounds.
What the affiliated firm has backed is the closest available signal on whether Seth Rosen is worth approaching.
Colleagues at Western Technology Investment
Maurice Werdegar
Chairman
Portola Valley, United States
Rudy Ruano
Investment Partner
Palo Alto, United States
Bill Miller
Director
Menlo Park, United States
Patrick Ward
Principal
New York, United States
David Gravano
Partner
San Jose, United States
Ronald Swenson
Partner
San Jose, United States
Allison Lee
Principal
New York City, United States
Maddy Burleson
Principal
San Francisco, United States
Dylan Bern
Principal
Portola Valley, United States
Ryan Turner
Partner
Menlo Park, United States
Jon Beizer
Investor
Burlingame, United States
Frequently asked questions
Who is Seth Rosen?
Seth Rosen is a private equity investor and venture debt investor based in Boston, Massachusetts, United States, listed as Venture Partner at Western Technology Investment. The known portfolio of that firm counts 11 companies. That portfolio belongs to the firm, not to Seth Rosen personally.
What does Seth Rosen invest in?
Listed sectors include AI, Climate, Commerce and Consumer; listed focus areas include Aerospace, Analytics, Clean Energy and Cloud Infrastructure. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Seth Rosen invest at?
Western Technology Investment appears in Growth, Late-Stage and Pre-Seed rounds across its known deals, and Seth Rosen is listed there as Venture Partner. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Seth Rosen listed at?
Seth Rosen is listed as Venture Partner at Western Technology Investment. 11 other people in the database share a firm with Seth Rosen.
How do I contact Seth Rosen?
An email address, a phone number and a LinkedIn page are on file for Seth Rosen. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal