Invests in tech startups that solve sustainability challenges in an ingenious and profitable way​


About Us

Fortress Fund is an active pre-seed investor in Norwegian tech companies solving global sustainability challenges.

We first invest in pre-seed rounds, typically between 1-2MNOK for 10% ownership, and then aim to follow up in the next rounds with 1-2MNOK.

After the initial investment, we personally guide you in scaling your venture and preparing for the next fundraising rounds (Seed, Series A).

Why Us?

We are company -builders and operators. Together our team has started and exited multiple companies. We`ve been in the founder's seat and know how hard it is. ​

Through having helped 100+ companies over the last five years, we have developed a deep understanding of what it takes to transform a ground-breaking idea into a scalable business.

Our Approach

We are a generalist pre-seed fund with specialist investors and partners within Enterprise SaaS, Energy Systems, AI, and Smart Cities.​

We will actively support you in building and scaling your venture to international markets. We share our vast network and domain experience to help you move faster. We like to be able to take board seats, and we usually spend our time tweaking your business model, go-to-market plan, fundraising strategy, technology roadmap, and help build a strong team.

What does
Fortress Fund
Invest in?




Digital Energy Systems

Investment Team


Lorenzo Ruscelli

Fund Manager / CEO

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Ståle Bjørnstad

Investment Manager

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Eli Haugerud

Investment Manager

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Knut Johansen

Investment Manager

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Stian Johansen


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In order for us to evaluate companies we require the following documents to be uploaded in the asked formats.

We will not reply or evaluate companies that fail to provide us with the requested information.

Håkon Melbergs Vei 16, 1783 Halden