# Lothar Stein

> Lothar Stein is a seed investor backing Information Technology and Energy. See 7 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Location: Munich, Germany
- Total investments: 7
- Last investment: Mar 2017
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/lothar-stein-3ba52856

Lothar Stein is a seed investor in Munich focused on Information Technology and Energy. Lothar Stein - Mentor @ SINN Power

## Contacts

5 contacts available for Lothar Stein: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/lothar-stein?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Series A | $7.5M–$9M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Information Technology | 2 | 29% |
| Energy | 1 | 14% |
| Railroad | 1 | 14% |
| Software | 1 | 14% |
| Machine Learning | 1 | 14% |

8 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 29% |
| Series A | 1 | 14% |
| Private Equity | 1 | 14% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| KONUX | KONUX is a German AI scale-up, transforming railway operations for a sustainable future. It combines Machine Learning and IoT to make railway the mobility choice of tomorrow by increasing capacity, reliability, and cost-efficiency. Since its foundation in 2014, KONUX has raised more than $130 million from world-leading investors, expanded tomultiple countries in Europe and Asia, and was selected by the World Economic Forum (WEF) as one of the world’s 30 most innovative start-ups and scale-ups worldwide. | $9M | Series A | Mar 06, 2017 | http://konux.com |
| SINN Power | We distribute our sustainable power generation technologies designed for harsh and maritime environments.Using the scalable versatile floating platform and our power electronics, we provide the ideal components for our wave power plants.In addition, these enable seamless incorporation of other sustainable generation technologies such asphotovoltaics and small wind turbines into our systems.We configure structural and electrical technologies individually assembled for your site and provide you with a one-stop solution up to grid feed-in. |  | Private Equity | Nov 11, 2016 | http://www.sinnpower.com |
| KONUX | KONUX is a German AI scale-up, transforming railway operations for a sustainable future. It combines Machine Learning and IoT to make railway the mobility choice of tomorrow by increasing capacity, reliability, and cost-efficiency. Since its foundation in 2014, KONUX has raised more than $130 million from world-leading investors, expanded tomultiple countries in Europe and Asia, and was selected by the World Economic Forum (WEF) as one of the world’s 30 most innovative start-ups and scale-ups worldwide. | $7.5M | Series A | Apr 08, 2016 | http://konux.com |
| SINN Power | We distribute our sustainable power generation technologies designed for harsh and maritime environments.Using the scalable versatile floating platform and our power electronics, we provide the ideal components for our wave power plants.In addition, these enable seamless incorporation of other sustainable generation technologies such asphotovoltaics and small wind turbines into our systems.We configure structural and electrical technologies individually assembled for your site and provide you with a one-stop solution up to grid feed-in. |  | Private Equity | Dec 23, 2015 | http://www.sinnpower.com |
| KONUX | KONUX is a German AI scale-up, transforming railway operations for a sustainable future. It combines Machine Learning and IoT to make railway the mobility choice of tomorrow by increasing capacity, reliability, and cost-efficiency. Since its foundation in 2014, KONUX has raised more than $130 million from world-leading investors, expanded tomultiple countries in Europe and Asia, and was selected by the World Economic Forum (WEF) as one of the world’s 30 most innovative start-ups and scale-ups worldwide. | $2M | Seed | Apr 01, 2015 | http://konux.com |
| SINN Power | We distribute our sustainable power generation technologies designed for harsh and maritime environments.Using the scalable versatile floating platform and our power electronics, we provide the ideal components for our wave power plants.In addition, these enable seamless incorporation of other sustainable generation technologies such asphotovoltaics and small wind turbines into our systems.We configure structural and electrical technologies individually assembled for your site and provide you with a one-stop solution up to grid feed-in. |  | Seed | Nov 11, 2014 | http://www.sinnpower.com |

6 of 7 investments shown.

## Co-investors
- [MIG Capital](https://shizune.co/investors/profile/mig-ag) — VC Fund, 3 deals together
- [UVC Partners](https://shizune.co/investors/profile/uvc-partners) — VC Fund, 3 deals together
- [Foundation Capital](https://shizune.co/investors/profile/foundation-capital) — VC Fund, 1 deal together
- [FOUNDER.org](https://shizune.co/investors/profile/founder-org) — VC Fund, 1 deal together
- [Green Bay Ventures](https://shizune.co/investors/profile/green-bay-ventures) — VC Fund, 1 deal together
- [New Enterprise Associates](https://shizune.co/investors/profile/new-enterprise-associates) — VC Fund, 1 deal together

## Similar investors

### Similar industry
- [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

### 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

### Similar country
- [HTGF (High-Tech Gruenderfonds)](https://shizune.co/investors/profile/high-tech-gr%C3%BCnderfonds) — VC Fund
- [HV Capital](https://shizune.co/investors/profile/holtzbrinck-ventures) — VC Fund
- [IBB Ventures](https://shizune.co/investors/profile/ibb) — VC Fund

## Featured in investor lists
- [Artificial intelligence Angel Investors in Germany](https://shizune.co/investors/artificial-intelligence-angel-investors-germany)
- [Transportation Angel Investors in Germany](https://shizune.co/investors/transportation-angel-investors-germany)
- [Artificial intelligence Angel Investors in Europe](https://shizune.co/investors/artificial-intelligence-angel-investors-europe)
- [Transportation Angel Investors in Europe](https://shizune.co/investors/transportation-angel-investors-europe)
- [Machine Learning Investors in Germany](https://shizune.co/investors/machine-learning-investors-germany)
- [Machine Learning Angel Investors in Europe](https://shizune.co/investors/machine-learning-angel-investors-europe)

## FAQ

### What does Lothar Stein invest in?

Lothar Stein invests primarily in Information Technology, Energy and Railroad startups, most often at Seed and Series A stage. Most of the 7 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Lothar Stein's check size?

Lothar Stein typically joins rounds of $7.5M–$9M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Lothar Stein participates in.

### How do I contact Lothar Stein?

Public channels for Lothar Stein include LinkedIn. 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.

### When did Lothar Stein last invest?

The most recent investment recorded for Lothar Stein closed in Mar 2017. Shizune tracks 7 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### 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.

# About Shizune
Shizune.co is an investor database. Core features:
- 48,091 startup investors (angels, VCs, accelerators, and others)
- Email, phone, LinkedIn (for intros), socials, and other contact data
- Updated daily from public funding news
- CSV and Excel export

The User can access the full database FOR FREE after signing up: shizune.co