Organization · Private Equity
Turnstone Capital Management LLC
Turnstone Capital Management LLC is an investment firm based in Rowayton, Connecticut, focusing on early-stage technology ventures and infrastructure projects that support the energy transition.
Overview
What Turnstone Capital Management LLC does
What Turnstone Capital Management LLC is
Turnstone Capital Management LLC is an investment firm based in Rowayton, Connecticut, focusing on early-stage technology ventures and infrastructure projects that support the energy transition.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Private Equity
- Founded
- Founded in 2004
- Approximate age
- About 22 years
- Structured capabilities
- Funder
- Last reviewed
- March 4, 2026
Official channels
Find Turnstone Capital Management LLC elsewhere
Open the official website or a supported primary organization account.
Capability profile
Turnstone Capital Management LLC as a funder
Investment thesis
Turnstone Capital invests in early-stage technology ventures and infrastructure projects that support the energy transition. They focus on disruptive technologies with validated product-market fit and renewable energy initiatives.
Focus narrative
Turnstone Capital focuses on early-stage technology ventures and infrastructure projects. Their investment strategy includes sponsoring bespoke investment partnerships in early-stage ventures (Seed, A Round) that are developing disruptive technology with validated product-market fit. Current sector interests include AI Infrastructure and Applications, and Enterprise Software, as well as renewable energy projects aimed at creating a cleaner infrastructure.
Focus and fit
- Stages
- Seed · Series A
- Regions
- EuropeNorth America
Availability
- Currently deploying
- Not published
Portfolio and track record
- Recorded notable exits
- Luxexcel and Google dMarc Broadcasting
Portfolio context
Notable portfolio companies include EnerSmart Storage, a California-based developer of distributed energy storage; Veritone, creators of 'AiWare,' a SaaS AI operating system; Luxexcel, a Netherlands-based company specializing in 3D printing optics technology; Morgan Solar, focusing on energy optics and IoT technology; and Google dMarc Broadcasting, an ad-serving technology company acquired by Alphabet.
Common questions
What to know about Turnstone Capital Management LLC
Upseed classifies Turnstone Capital Management LLC under the Private Equity organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
March 4, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.