Organization · Venture Capital
AltEnergy, LLC
AltEnergy, LLC is an entrepreneurial investor based in Rowayton, Connecticut, focusing on alternative energy projects and businesses globally. They engage in investment, development, and management across various sectors within the alternative energy space.
Overview
What AltEnergy, LLC does
What AltEnergy, LLC is
AltEnergy, LLC is an entrepreneurial investor based in Rowayton, Connecticut, focusing on alternative energy projects and businesses globally. They engage in investment, development, and management across various sectors within the alternative energy space.
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
- Venture Capital
- Founded
- Founded in 2006
- Approximate age
- About 20 years
- Structured capabilities
- Funder
- Last reviewed
- April 10, 2026
Official channels
Find AltEnergy, LLC elsewhere
Open the official website or a supported primary organization account.
Capability profile
AltEnergy, LLC as a funder
Investment thesis
AltEnergy, LLC focuses on investing in transformative alternative energy solutions, emphasizing energy storage, transmission infrastructure, and renewable power generation.
Focus narrative
AltEnergy invests across various sectors within the alternative energy landscape, including biofuels, renewable power generation, demand response software, transmission infrastructure, and energy storage technology. The organization employs a disciplined investment strategy, targeting opportunities from startups to established companies, with investments typically ranging from $5 million to $50 million.
Value beyond capital
AltEnergy adds value to its portfolio companies through active involvement in corporate development and management, leveraging its expertise in the alternative energy sector to drive growth and innovation.
Terms and economics
- Typical check
- $5,000,000–$50,000,000
Focus and fit
- Stages
- Seed · Series A · Series B · Series C · Growth Equity
- Regions
- North AmericaUnited States
Availability
- Currently deploying
- Yes
Portfolio and track record
- Recorded portfolio count
- 5
- Recorded notable exits
- Eos Energy Enterprises
Portfolio context
Notable portfolio companies include: Hawkeye Renewables: A leading biofuels company and one of the largest ethanol producers in the U.S. Iowa Winds: A company with a significant wind power portfolio in Iowa. Viridity Energy: A demand response software company addressing market needs in the energy sector. Tres Amigas: A transmission hub connecting the three isolated super-grids in the U.S. Eos Energy Storage: Focused on energy storage technology, specifically a zinc-aqueous hybrid battery.
Common questions
What to know about AltEnergy, LLC
Upseed classifies AltEnergy, LLC under the Venture Capital 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
April 10, 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.