Johannes Weber
Principal @ HTGF (High-Tech Gruenderfonds)
Hamburg, Germany
Johannes Weber is a seed investor at HTGF (High-Tech Gruenderfonds) in Hamburg focused on Software and Manufacturing. VC @ HTGF, Angel @ 11k Ventures
- Total investments:
- 23
- Last investment:
- Lead investor:
- 26%
Last updated:
For AI agents: llms.txt
Industries Johannes Weber invests in
Stages Johannes Weber invests in
Countries Johannes Weber invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Investment Focus
Industry
- Software 5 (22%)
- Manufacturing 3 (13%)
- Artificial Intelligence 3 (13%)
- Medical Device 2 (9%)
- Renewable Energy 2 (9%)
Stage
- Seed 8 (35%)
- Series A 5 (22%)
- Pre-Seed 4 (17%)
- Series B 2 (9%)
- Series C 1 (4%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| syte simplifies real estate decisions with AI-based software. Founded in 2021 and based in Münster, Germany, the company analyzes land and buildings in real time and makes complex real estate analyses easily accessible. The syte platform offers digital twins by intelligently linking various types of data, including cadastral and LiDAR data, aerialand satellite images, and market data. The database enables informed statements to be made about development opportunities, renovation potential, energy requirements, economic efficiency, and subsidy options.Project developers, real estate agents, and banks use syte for valuations, planning, and consulting. This includes evaluating locations, reviewing investment decisions, analyzing portfolios with regard to renovation needs, and identifying subsidies. Instead of time-consuming individual research or external expert opinions, the platform enables a reliable initial assessment.The team of over 30 people led by founders Matthias Zühlke and David Nellessen serves over 200 customers – from local real estate agencies to banks with thousands of properties. syte has received multiple awards for its innovative software, including the German AI Award 2023 and the PropTech of the Year Award 2025. | $10.3M / Series A / Sep 17, 2026 | ||
| Proxima Fusion is a fusion energy company developing stellarator-based fusion power plants to deliver safe, carbon-free, and commercially viable electricity. The company focuses on commercializing quasi-isodynamic (QI) stellarators, a type of magnetic confinement fusion reactor designed to provide continuous and stable plasma operation. ProximaFusion collaborates closely with research institutions, industrial partners, and energy companies across Europe through the Alpha Alliance, a consortium established to scale the manufacturing and engineering capabilities needed for commercial fusion. The company leverages scientific breakthroughs from the Wendelstein 7-X (W7-X) stellarator while developing proprietary engineering, simulation, and manufacturing technologies to industrialize fusion power generation. | $470.1M / Series B / Jul 07, 2026 | ||
| nuuEnergy is a tech-enabled solution aiming to revolutionize the heat pump installation industry. By leveraging technology and industry expertise, we streamline the purchasing and installation process. Our unique approach, refinanced through innovative strategies, promotes a self-reliant and carbon-neutral lifestyle for all our customers. | $5.1M / Seed / Feb 17, 2026 | ||
| nuuEnergy is a tech-enabled solution aiming to revolutionize the heat pump installation industry. By leveraging technology and industry expertise, we streamline the purchasing and installation process. Our unique approach, refinanced through innovative strategies, promotes a self-reliant and carbon-neutral lifestyle for all our customers. | $1.6M / Pre-Seed / Jun 12, 2025 | ||
| Proxima Fusion is a fusion energy company developing stellarator-based fusion power plants to deliver safe, carbon-free, and commercially viable electricity. The company focuses on commercializing quasi-isodynamic (QI) stellarators, a type of magnetic confinement fusion reactor designed to provide continuous and stable plasma operation. ProximaFusion collaborates closely with research institutions, industrial partners, and energy companies across Europe through the Alpha Alliance, a consortium established to scale the manufacturing and engineering capabilities needed for commercial fusion. The company leverages scientific breakthroughs from the Wendelstein 7-X (W7-X) stellarator while developing proprietary engineering, simulation, and manufacturing technologies to industrialize fusion power generation. | $149.6M / Series A / Jun 11, 2025 | ||
| syte simplifies real estate decisions with AI-based software. Founded in 2021 and based in Münster, Germany, the company analyzes land and buildings in real time and makes complex real estate analyses easily accessible. The syte platform offers digital twins by intelligently linking various types of data, including cadastral and LiDAR data, aerialand satellite images, and market data. The database enables informed statements to be made about development opportunities, renovation potential, energy requirements, economic efficiency, and subsidy options.Project developers, real estate agents, and banks use syte for valuations, planning, and consulting. This includes evaluating locations, reviewing investment decisions, analyzing portfolios with regard to renovation needs, and identifying subsidies. Instead of time-consuming individual research or external expert opinions, the platform enables a reliable initial assessment.The team of over 30 people led by founders Matthias Zühlke and David Nellessen serves over 200 customers – from local real estate agencies to banks with thousands of properties. syte has received multiple awards for its innovative software, including the German AI Award 2023 and the PropTech of the Year Award 2025. | $5.6M / Seed / Sep 26, 2024 | ||
| Proxima Fusion is a fusion energy company developing stellarator-based fusion power plants to deliver safe, carbon-free, and commercially viable electricity. The company focuses on commercializing quasi-isodynamic (QI) stellarators, a type of magnetic confinement fusion reactor designed to provide continuous and stable plasma operation. ProximaFusion collaborates closely with research institutions, industrial partners, and energy companies across Europe through the Alpha Alliance, a consortium established to scale the manufacturing and engineering capabilities needed for commercial fusion. The company leverages scientific breakthroughs from the Wendelstein 7-X (W7-X) stellarator while developing proprietary engineering, simulation, and manufacturing technologies to industrialize fusion power generation. | $21.7M / Seed / Apr 09, 2024 | ||
| Replacing fossil feedstock using plastic waste and CO2 | $5.1M / Seed / Feb 21, 2024 | ||
| Instagrid creates software-defined battery systems for advanced portable power supplies. | $94.9M / Series C / Jan 23, 2024 | ||
| Resourcify is on a mission to enable a zero-waste future!!! Through the digitisation of daily operations, our recycling platform enables all businesses to manage, track, and improve their recycling while having less administration, and saving up to 40% of the costs compared to conventional waste management.Resourcify is trusted by thousands ofthe most leading companies & organisations around the globe including : Cargill, McDonalds, Hornbach, Johnson & Johnson, Edeka, Frankfurt Airport, UK Bonn, and more! Our award-winning recycling platform improves the approach to sustainability as a best practice and enhances the recycling processes to reduce waste. | $15.4M / Series A / Sep 27, 2023 | ||
| See all 23 investments → | |||
Co-Investors
High-Tech Grunderfonds finances startups with growth potential. Its team of investment managers supports young companies with expertise, entrepreneurial spirit, and passion. The company focuses in the fields of digital tech, industrial tech, life sciences, chemistry, and related business areas. It also focuses on financial services in varioussectors.
HTGF (High-Tech Gruenderfonds) Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Alexander Hölz
Investment Controller
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Cornelia Klug
Marketing & Communications
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Irina Gerlach
Head of Office
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Kristin Müller
Investment Manager
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Lena Krzyzak
Principal
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FAQ
What does Johannes Weber invest in?
Johannes Weber invests primarily in Software, Manufacturing and Artificial Intelligence startups, most often at Seed and Series A stage. Most of the 23 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Johannes Weber?
Public channels for Johannes Weber 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 Johannes Weber last invest?
The most recent investment recorded for Johannes Weber closed in Sep 2026. Shizune tracks 23 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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