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Thin Line Capital
AddedFeb 15, 2024
UpdatedJun 28, 2026
Thin Line Capital

Thin Line Capital

Operating

Thin Line Capital: Experienced venture capital managers specializing in seed-stage, low-capex energy/sustainability investments.

Location
Pasadena, CA, US
Founded
2017
Firm
Compare
Portfolio
Employees
Website

Thin Line Capital is a seed-stage venture capital firm specializing in low-capex opportunities within the energy and sustainability sectors. The firm focuses on early-stage investments, typically participating in seed and Series A rounds. Thin Line Capital leverages its team's entrepreneurial experience and deep market knowledge to support startups in the climate-tech space.

The firm's portfolio includes notable companies such as Divirod, Operant Networks, Optiwatt, Voltaiq, and XGS Energy. Thin Line Capital's partners bring valuable expertise, having founded six climate-tech companies, including two unicorns. The firm emphasizes ethical conduct and is committed to partnering with dedicated entrepreneurs who are determined to succeed in the challenging energy and sustainability industries.

Thin Line Capital - Portfolio Snapshot

Portfolio activity breakdown across disclosed investments and stages

Total Investments8
Current Portfolio Count6
Total Portfolio Exits0

Top Investment Stages

Seed4 (50.0%)
Series A2 (25.0%)
Convertible Note1 (12.5%)
Series Unknown1 (12.5%)

Stage Mix

Seed 50%Series A 25%Convertible Note 13%Series Unknown 13%

Concentration shown as share of disclosed investments by stage.

Recent Investments

XGS Energy logo

XGS Energy

Optiwatt logo

Optiwatt

Divirod logo

Divirod

Operant Networks logo

Operant Networks

Sunairio logo

Sunairio

Voltaiq logo

Voltaiq

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Thin Line Capital - Classification

Also Known As
  • Thin Line Capital, LLC
NAICS
  • 520000Finance and Insurance
  • 523000Securities, Commodity Contracts, and Other Financial Investments and Related Activities
  • 523900Other Financial Investment Activities
  • 523990All Other Financial Investment Activities
  • 523999Miscellaneous Financial Investment Activities
SIC
  • 6700Holding And Other Investment Offices
  • 6790Miscellaneous Investing
  • 6799Investors, Not Elsewhere Classified
Show 5 more industry codes
NAICS
  • 525000Funds, Trusts, and Other Financial Vehicles
  • 523910Miscellaneous Intermediation
SIC
  • 6000Depository Institutions
  • 6720Investment Offices
  • 6722Management Investment Offices, Open-end