Investor profile
Thomas Tarnowski
Corporate VC, Family Office, Private equity, Venture debt & Managing Director at Summit Partners
Thomas Tarnowski is a Managing Director at Summit Partners, whose known portfolio counts 22 companies.
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Investment focus
- Focus
- AnalyticsBatteryCRMClean EnergyCloud InfrastructureCollaborationCommunity EventsCustomer SupportCybersecurityDataEnterprise SaaSHealthcare OperationsInformation ServicesLogisticsMarketing TechMedTechPaymentsProperty ServicesRetail TechSecuritySupply ChainTelecommunicationsVertical SaaSWealth Management
Contacts
Affiliated funds' portfolios
Managing Director at Summit Partners, whose known portfolio counts 22 companies
- Grockit
- Instrumentl
- Fundraise Up
- Sanctuary
- Stay22
- BookingLive
- Hyperlight
- Manychat
- Quorso
- Authenticate Information Systems
- Cenosco
- Cityport
- and 10 more
Investor Profile
Thomas Tarnowski is listed against sectors Climate, Commerce, Consumer and Energy, and focus areas Analytics, Battery, CRM and Clean Energy in the database.
Summit Partners appears in Late-Stage, Seed and Series B rounds across its known deals.
The firm portfolio and the focus above give founders context on whether Thomas Tarnowski matches their raise.
Colleagues at Summit Partners
Showing 20 of 79
Walter Kortschak
Senior Advisor
United States
Alex Yaroslavsky
Member
New York, United States
Kit Hunter Gordon
Founder & Managing Director
London, United Kingdom
Ryan McDonald
Healthcare Investor
San Francisco, United States
John Carroll
Managing Director
Boston, United States
Matthew Hamilton
Managing Director
Boston, United States
Hanyin Cheng
Principal
Cambridge, United States
Christopher Dean
Managing Director
Boston, United States
Chris Bon
Partner
London, United Kingdom
Darren Black
Managing Director
Boston, United States
Mark Hexamer
Principal, Talent & Recruiting
San Francisco, United States
Han Sikkens
Growth Investor & Head of Summit Partners Europe
London, United Kingdom
Jono Pagden
Partner
London, United Kingdom
Ravi Shah
Board Member
New York, United States
Johannes Grefe
Managing Director
London, United Kingdom
Andrew Collins
Managing Director
San Francisco, United States
Ross D. Stern
Managing Director
Boston, United States
Sydney Glickson
Technology Investor
San Francisco, United States
Matthew Burgess
Summit Ambassador
Los Angeles, United States
Clarck Oritiyz
Funding Specialist
Compton, United States
Frequently asked questions
Who is Thomas Tarnowski?
Thomas Tarnowski is a corporate venture investor and family office investor based in London, England, United Kingdom, listed as Managing Director at Summit Partners. The known portfolio of that firm counts 22 companies. That portfolio belongs to the firm, not to Thomas Tarnowski personally.
What does Thomas Tarnowski invest in?
Listed sectors include Climate, Commerce, Consumer and Energy; listed focus areas include Analytics, Battery, CRM and Clean Energy. 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 Thomas Tarnowski invest at?
Summit Partners appears in Late-Stage, Seed and Series B rounds across its known deals, and Thomas Tarnowski is listed there as Managing Director. 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 Thomas Tarnowski listed at?
Thomas Tarnowski is listed as Managing Director at Summit Partners. 79 other people in the database share a firm with Thomas Tarnowski.
How do I contact Thomas Tarnowski?
An email address, a phone number and a LinkedIn page are on file for Thomas Tarnowski. 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 6 September 2026 · How this data is built · Report a correction or request removal