aegirion ventures

Building and scaling platform businesses in complex environments.

From complexity to scale.aegirion ventures combines venture building and strategic investment with hands-on executive advisory and execution. Where the mandate demands it, we deploy full teams - product, engineering, design and operations - from our network of senior operators across Europe. From early concept to scale, we take ownership of the outcome.

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What we do

Three modes.
One mission.

aegirion ventures operates as a venture builder, an investor and an executive advisory practice.We co-found and build platform businesses from the ground up. We back exceptional founders with capital, operator experience and network. And we step alongside leadership teams who need execution capacity at critical moments: as a single executive or as a full deployed team. Whatever the mandate requires, we take ownership and stay accountable for outcomes.

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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. Where execution is needed, we deploy product, engineering, design and operations talent from our senior operator network. We have done it before. We know where the complexity hides.

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Executive Advisory & Execution

Operator-first. Team-ready.

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. Depending on what the mandate requires, we engage as a single senior executive or deploy a full team from our network of product managers, engineers, designers and operators across Europe. Permanent or interim. Project-based or ongoing.

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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.

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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.Zero to EUR 1M ARR in 18 months. 25 million customers. 17,500 advisors. Fortune Global 500 CIOs. The numbers are real. The complexity was too.Venture builder, investor and executive advisor. Backed by a network of senior operators across Europe. International experience across Europe, the Middle East and Latin America. Offshore sailor.Previously: Ueberseehub · Allianz X · Deutsche Fintech Solutions · ThoughtWorks · ABB Group · alfabet / Software AG

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Contact

Let's talk.

Translating complexity into scalable business models.If you are building something ambitious, need execution capacity at short notice, or are navigating a transformation that requires more than advice - reach out.

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