We build companies

We build companies

The futures of companies depend on new concepts. They will require sustainable approaches, boundary-pushing attitudes and game-changing innovation – and we’re ready to play.


As passionate entrepreneurs, all of us have been part of the start-up & tech industry for more than 15 years.

We have founded several companies, and while some were more successful than others, we have approached each and every project with deep commitment and equal enthusiasm.

We are always open to and looking for new ideas. However, the three areas where we really stand out due to our vast experience are e-commerce, data and tech

With ATVNTR we have joined forces with very clear intentions:

To work alongside like-minded entrepreneurs, have fun and build something cool & meaningful together.

To engage in new ideas and involve ourselves in a variety of commerce-centric projects.

To take entrepreneurial risks – the smart way, by building a portfolio and hedging our investments.

What we can offer you

Whether you are a fledgling start-up, an established hidden champion, a person with an idea or a team at a crossroads: It takes a lot to succeed and to keep moving forward.

We are here to accompany and consult you on your business journey with our expertise, our many years of experience, and our know-how that may come in forms of of general sparring, detailed strategising, efficient implementation and at times capital investment.

The Team

Andreas Fischer

Our man for organisation and communication, Andreas is an authority on e-commerce and marketing.

Current role: CEO at minubo

Previous companies include: studiVZ, Bertelsmann, Modomoto, Outfittery

Mathias Fiedler

Our philanthropist, tech genius & great entrepreneur all in one – and an expert for tech and e-commerce.

Current role: CTO & advisor at Stroeh e-commerce

Previous companies include: OXID eSales, artflakes, Modomoto, Outfittery

Lennard Stoever

Our visionary, always full of great ideas, Lennard is an expert for business intelligence, organizational structure and sustainable concepts.

Current role: co-founder & management board at Zellerfeld

Previous companies include: Sportplatz Media, minubo, adtriba

Become part of the team!

We’re always on the lookout for the next idea and look forward to hearing from you.

Our Portfolio

ATVNTR bundles the shares we own in our three portfolio companies. Each of the companies is run by one of us in day-to-day operations. At the same time, we work very closely together on strategic topics and support one another where needed.

What unites these companies

What unites these companies is that they all shape the future of commerce – each in its own way.

What differentiates them is that they are at very different stages and therefore have other risk-reward-profiles. We believe this is essential for a good portfolio mix and ensures that we are not putting all our eggs in one basket.

Our goal for now is to ensure the success of the current portfolio companies, yet over time we might add more companies to our portfolio.

Get in touch

We’re always on the lookout for the next idea, inspirational project or fun challenge and look forward to hearing from you.

Write us and we’ll be in touch shortly: