Strategy is the
Art of Embracing
the Unknown

25A0 is unicode for black square and a management consultancy at the intersection of research, art and business.

We design strategic moves with tangible business results for clients that are driven by curiosity, vision and impact.

Guiding Ideas

Innovation requires Continuity.

Transformation and change do not happen over night.

That is why we don’t work against time.

Apathy enables Tyranny.

Not deciding is the worst decision.

That is why we support and inform decision making processes.

Simple is not easy.

Information overload is difficult to tackle.

That is why we structure complexity to say it simple.


Explore What’s Going On?

Making sense of the world requires more than quantification.

We combine a broad range of qualitative and investigative approaches with a high sensitivity for culture and everyday life.

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Create And What’s Next?

Ideas aren’t worth much without execution.

We bridge the gap between strategic oversight and operative baseline hands-on – with design, production, development and implementation.

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Selected Cases



Lothar Hartmann


In science, handcraft and economy, Lothar has acquired a broad range of creative and analytical skills to build and implement custom made solutions.

In his experience, unbiased innovation methods, explorative research and a team spirit that is not fueled by fear but by curiosity, increase the chance to implement sustainable and future-oriented solutions.


On behalf of the federal governments high-tech strategy, he has been involved in communicating and implementing regional climate adaptation strategies within the metropolitan region of Hamburg.

He has set up b2b and b2c product lines for a boutique interior lighting startup company, including the operational backend as well as the digital direct sales channel.

In various innovation, design and consulting contexts, he has worked for clients like the Otto Group, Volkswagen, Bayerische Hausbau, a private Bank based in Vaduz and the Hamburg University of Applied Sciences.

Besides his mother tongue german, he speaks portuguese and italian thanks to several stays abroad and still remembers some french grammar from school.

At 25a0 he helps organisations and networks to explore systemic questions and needs in order to gain insights that have a tangible strategic impact.

Next Member

Lothar Hartmann