# Thin Line Capital

> Thin Line Capital is a VC fund backing Energy and Renewable Energy. See 13 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Pasadena, United States
- Total investments: 13
- Last investment: Oct 2025
- Lead investor: 15%
- Fund size: $5M
- Last fund: Aug 2019
- Last updated: Aug 2026
- Website: https://www.thinlinecapital.com/

Thin Line Capital is a seed stage venture capital manager focused on low-capex opportunities in energy/sustainability. We are experienced entrepreneurs with strong market knowledge of what’s required to succeed in energy/sustainability industries.

## Contacts

5 contacts available for Thin Line Capital. Shizune tracks 1 team members at Thin Line Capital. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/thin-line-capital?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Energy | 3 | 23% |
| Renewable Energy | 3 | 23% |
| Information Technology | 3 | 23% |
| Analytics | 2 | 15% |
| Predictive Analytics | 2 | 15% |

24 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 6 | 46% |
| Series A | 4 | 31% |
| Funding Round | 1 | 8% |
| Convertible Note | 1 | 8% |
| Venture - Series Unknown | 1 | 8% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 8 | 62% |
| Canada | 2 | 15% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Aaron Fyke | Founder & Managing Partner | 3 | — |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| SenseNet Inc. | sensenet provides an integrated Internet-of-Things (IoT) system that revolutionises data collection and analysis for large-scale IoT applications, with a focus on early wildfire detection to protect public communities and private industries from the destructive effects of wildfires. The installation of their IoT system as a wildfire monitoring andprotection belt is part of this pilot project. | $14M | Series A | Oct 22, 2025 |  |
| Trace AQ | Trace AQ AI platform manage wildfire smoke, regulatory risk, and environmental disruptions with predictive insights. | $1.3M | Seed | May 28, 2025 |  |
| XGS Energy | XGS Energy is a geothermal heat harvesting technology company. | $20M | Series A | May 21, 2024 |  |
| XGS Energy | XGS Energy is a geothermal heat harvesting technology company. | $10M | Venture - Series Unknown | Jan 16, 2024 |  |
| Optiwatt, Inc. | We connect home electricity rate data with EV battery metrics to show you the cost of every charge. Securely login to your EV's app, automatically find your electric utility costs using your home address, and see your EV's impact on your electric bill. We also get rid of range anxiety with charge forecasting, and use home electricityrates and real-time gas prices in your area to accurately calculate the amount you save by driving electric. | $7M | Series A | Sep 14, 2023 |  |
| Divirod Inc. | Divirod is developing the next generation of water risks management solutiuons. With a geographically distributed monitoring network and cutting-edge predictive data intelligence system, Divirod provides timely and reliable water risk insights helping businesses mitigate the financial impact from physical risks such as floods & droughts. | $3.6M | Convertible Note | Aug 03, 2023 |  |
| Othersphere | Othersphere identifies profitable and sustainable locations for deploying zero or low greenhouse gas industrial technologies. | $1.9M | Seed | Jul 17, 2023 |  |
| Operant Networks | Operant Networks is a network service provider company for complex systems and energy companies. This platform provides cyber-secure, and technology-agnostic solutions that help clients to deploy their services and evolve at a quicker rate than their competitors. Operant Networks was founded in 2016 and is headquartered in Santa Rosa, California. | $3.8M | Seed | Sep 19, 2022 |  |
| Sunairio | Sunairio is a developer of a weather intelligence platform for renewable energy prediction. Its platform offers simulations that account for correlations between multiple locations and weather features and leverages the complete NOAA sub-hourly historical archive. | $1.8M | Seed | May 13, 2022 |  |
| Optiwatt, Inc. | We connect home electricity rate data with EV battery metrics to show you the cost of every charge. Securely login to your EV's app, automatically find your electric utility costs using your home address, and see your EV's impact on your electric bill. We also get rid of range anxiety with charge forecasting, and use home electricityrates and real-time gas prices in your area to accurately calculate the amount you save by driving electric. | $4.3M | Seed | Feb 25, 2022 |  |

10 of 13 investments shown.

## Co-investors
- [Active Impact Investments](https://shizune.co/investors/profile/active-impact-investments) — VC Fund, 3 deals together
- [B Current Impact Investment](https://shizune.co/investors/profile/b-current-impact-investment) — VC Fund, 2 deals together
- [Constellation Technology Ventures](https://shizune.co/investors/profile/constellation-technology-ventures) — VC Fund, 2 deals together
- [Google Ventures](https://shizune.co/investors/profile/google-ventures) — VC Fund, 2 deals together
- [Urban Innovation Fund](https://shizune.co/investors/profile/urban-innovationfund) — VC Fund, 2 deals together
- [BlueScopeX](https://shizune.co/investors/profile/bluescopex) — VC Fund, 1 deal together

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Thin Line Capital invest in?

Thin Line Capital invests primarily in Energy, Renewable Energy and Information Technology startups, most often at Seed and Series A stage. Most of the 13 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Thin Line Capital?

Public channels for Thin Line Capital include the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Who are the partners at Thin Line Capital?

The team at Thin Line Capital includes Aaron Fyke (Founder & Managing Partner). The Team section lists each member with their title, investment count and links.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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