Johannes Weber
Managing Partner @ 11k Ventures
Hamburg, Germany
Johannes Weber is a seed investor at 11k Ventures in Hamburg focused on Software and Manufacturing. VC @ HTGF, Angel @ 11k Ventures
- Total investments:
- 22
- Last investment:
- Lead investor:
- 27%
Last updated:
For AI agents: llms.txt
Industries Johannes Weber invests in
SoftwareManufacturingArtificial IntelligenceMedical DeviceRenewable Energy
Stages Johannes Weber invests in
SeedPre-SeedSeries ASeries BSeries C
Countries Johannes Weber invests in
Germany
Investment Focus
Industry
- Software 5 (23%)
- Manufacturing 3 (14%)
- Artificial Intelligence 3 (14%)
- Medical Device 2 (9%)
- Renewable Energy 2 (9%)
Stage
- Seed 8 (36%)
- Pre-Seed 4 (18%)
- Series A 4 (18%)
- Series B 2 (9%)
- Series C 1 (5%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Proxima Fusion
|
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
|
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
|
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
|
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
|
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
|
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 | |
Cyclize
|
Replacing fossil feedstock using plastic waste and CO2 | $5.1M / Seed / Feb 21, 2024 | |
Instagrid
|
Instagrid creates software-defined battery systems for advanced portable power supplies. | $94.9M / Series C / Jan 23, 2024 | |
Resourcify
|
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 | |
traceless materials
|
traceless materials is offering a holistically sustainable alternative to plastics and bioplastics. With our first-of-a-kind biomaterial it’s our mission to contribute to solving global plastic pollution.Our innovative technology filed for patent allows to use food production residues to produce materials that are compostable under naturalcomposting conditions. While bio-based, our materials don’t compete with food nor cause land-use-change, don’t need hazardous additives or solvents and have up to 95% lower CO2 emissions. Our materials are neither chemically modified nor synthetically polymerized, therefore they will not fall under the EU Single Use Plastic Directive. Follow us on our journey, and become a part of the solution, not the pollution! | $38.8M / Series A / Sep 25, 2023 | |
| See all 22 investments → | |||
Co-Investors
About 11k Ventures
Business angel group that supports early-stage B2B Deep Tech startups.
11k Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
|
Johannes Weber
Managing Partner
|
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4 more contacts available
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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 Pre-Seed stage. Most of the 22 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.
When did Johannes Weber last invest?
The most recent investment recorded for Johannes Weber closed in Jul 2026. Shizune tracks 22 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.
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