aegirion ventures

Building and scaling platform businesses in complex environments.

We build, back and advise.aegirion ventures combines venture building and strategic investment with hands-on executive advisory, working with founders, boards and investors at the intersection of technology, regulation and growth. From early concept to European scale.

What we do

Two modes.
One mission.

aegirion ventures operates as both a venture builder and an executive advisory practice. We co-found and build platform businesses from the ground up. And we step alongside founders, boards and investors who need operator-level support at critical moments.Whether we are building or advising, we take ownership and stay accountable for outcomes.

Venture Building

We build from conviction.

We identify opportunities at the intersection of technology, regulation and underserved markets. And we build alongside exceptional founders.Our venture building practice combines capital, operator experience and network to take platforms from concept to scale.We have done it before. We know where the complexity hides.

Executive Advisory

Operator-first. Always.

Our advisory practice works with founders, boards and leadership teams navigating complexity: in regulated markets, platform businesses, digital transformation and organisational scale.We do not advise from a distance. We take ownership, build alongside teams, and stay accountable for outcomes.Mandates range from interim executive leadership to strategic advisory, permanent or project-based, across Europe.

Where we operate

Our domains.

Regulated financial services and FinTech. InsurTech and digital insurance platforms. PropTech. Industrial technology and maritime/ OceanTech. Defense and critical infrastructure.Digital transformation in complex organisations.

About

Founded by Jens Riewe.

25+ years as an operator across regulated platforms, industrial technology and digital transformation in Europe. Managing Director, COO, CPO and CPTO level. Venture builder, interim executive and strategic advisor. Offshore sailor.

Contact

Let's talk.

If you are building something ambitious, facing a leadership gap, or navigating a transformation that needs more than advice - reach out.