Built for what's next

Scaling businesses beyond borders with smart capital and trusted partnerships

Numbers

Our Story

Our founders are our story

O3 Partners is a partnership as well as a close-knit family of private equity and venture capital investment and service provider entities with complementary regional and industry focus at different investment stages

See Our Family Members

PÉTER OSZKÓ, DR.

CO-FOUNDER, MANAGING PARTNER

Company builder, financial and transaction specialist with extensive problem-solving experience. After his career with various Big Four firms, he left his Managing Partner position in 2009 to take on a one-year crisis management role as Finance Minister. He then began his investor career during which he managed angel funds with spectacular returns and founded later a listed investment company, OXO Technologies Holding, which served as the predecessor to the current O3 Partners.

PEKKA MÄKI

CO-FOUNDER, MANAGING PARTNER

A seasoned growth equity investor with extensive experience in scaling technology companies across Europe and globally. Under his leadership, 3TS Capital Partners advised funds totalling more than €400m have invested into dozens of scaleups including LogMeIn, SolveDirect, Avangate, PerfectGym, Salesmanago, Piano, Homecare, Boksi, Autenti or Tosibox as an example. Earlier, he has been an angel investor and entrepreneur in consulting, media and advertising.

Our Approach

High-expertise partner scaling businesses beyond borders

We invest across borders to help outstanding founders and promising ventures scale beyond local limitations

O3 Partners connects stable yet high-growth businesses with capital that is not only smart and sector-aware, but geographically unbounded and capable of providing long-term, multi-cycle financing for growth. By combining regional expertise with a pan-European perspective, we simplify market entry, expansion, and scalability for selected founders ready to go beyond their home turf.

We operate with unified governance while ensuring independent, yet thorough investment decisions

Our framework provides transparency for LPs, while competitive operational efficiency and at the same time independent decision-making for family member GPs. Our integrated portfolio management system streamlines deal flow, valuations, risk management, and follow-on investments. This structure enables more efficient capital allocation and better risk-adjusted results.

We offer extensive market access, a completely unique pipeline and even particular co-investment opportunities

The diversity of O3 Partners provides access to exceptional market depth and unique deal information, which we use in our continuously evolving data-driven approach to select the best investment opportunities. This way, our investors can not only get the latest market updates, but also have the chance to take advantage of investment opportunities that are relevant to them.

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