Thin Line Capital

General contacts
Investor type

VC

Founded

2017

AUM

-

Location

Pasadena, California, United States

Investment Ticket

$0-1 m

Investment Stage

Seed Series B

Region of investment

North America

ESG Focus

Impact investor
Investor profile last updated: 11 August, 2026

Profile

Thin Line Capital is a venture capital firm based in Pasadena, California, founded in 2017 by Aaron Fyke, a seasoned entrepreneur with a background in climate-tech. The firm is composed of a small team of professionals who bring deep technical and engineering expertise to support founding teams. Thin Line Capital is distinguished by its commitment to ethical conduct and its focus on partnering with entrepreneurs to drive success in the energy and sustainability sectors.

The firm invests in seed-stage, low-capex companies with a focus on renewable energy, electrification of transport, and climate resiliency. Typical investment sizes range from $400,000 to $600,000, and the firm primarily operates in North America. Thin Line Capital follows a concentrated portfolio strategy to maximize resource allocation for portfolio success.

Notable investments include SenseNet - other hardware, Trace AQ - environmental services, Audette - business productivity software, Mineral Forecast - business productivity software, and XGS Energy - energy infrastructure. These investments reflect the firm's focus on sectors that contribute to the decarbonization of the global economy.

Industry

WaterTech Technology ClimateTech Internet of Things (IoT) CleanTech Energy AI Agriculture

Contacts

Name
Title
Email
Social Networks
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Aaron Fyke Founder and Managing Partner
Founder and Managing Partner
a•••@•••
LinkedIn
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Investment-team contacts for Thin Line Capital — including verified work emails and LinkedIn profiles — are available to Private Equity List subscribers.
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FAQs about Thin Line Capital

Thin Line Capital is a venture capital firm. It backs companies at Seed and Series B, writing tickets of $0-1 m.
Thin Line Capital is located in Pasadena, California, United States.
Thin Line Capital was founded in 2017.
Thin Line Capital invests in companies and startups in WaterTech, Technology, ClimateTech, Internet of Things (IoT), CleanTech, Energy, AI, Agriculture.
Thin Line Capital invests in companies and startups in North America.
Thin Line Capital invests in companies and startups at Seed, Series B.
Thin Line Capital usually invests $0-1 m on average.
Yes, Thin Line Capital is impact investor.
Thin Line Capital can be reached through its website thinlinecapital.com and its LinkedIn page. Its general enquiries address is [email protected]. Cold-mailing a general inbox rarely reaches a partner, so Private Equity List also lists the investment-team contacts for Thin Line Capital — names, roles, verified work emails and LinkedIn profiles — available on a Pro plan from $129/month (see pricing). Contacts are sourced from the firm's website and LinkedIn and re-verified on a rolling cycle. Spot a stale contact, or none at all? Report it — we re-run that firm within 48h and get back to you.
Yes. Every field on this page — profile, funds, investment criteria, portfolio and investment-team contacts — is available programmatically through the Private Equity List REST API and MCP server, so AI assistants such as Claude and ChatGPT can query Thin Line Capital directly instead of scraping this page. One subscription covers both the web app and machine access — see API & MCP.
Private Equity List re-verifies investor profiles on a rolling cycle, pulling from the firm's own website and LinkedIn rather than a one-off import. This profile was last updated on 11 August, 2026. Something out of date here? Report it — we re-run that firm within 48h and get back to you.