Tuomas Honkinen

Counsel, Member of the Finnish Bar

I am a counsel at Castrén & Snellman’s Helsinki office and specialise in private equity and venture capital investments and private M&A. I have advised clients in a large number of domestic and cross-border transactions acting for private equity sponsors and industrial clients, including start-up and expansion stage companies. I also regularly advise clients on various ownership and equity structuring, fund formation and management, joint venture and general corporate law matters.

Latest references

We advised Springvest Oyj in organising a EUR 45 million Series A funding round for ReOrbit, a space technology company and a leading provider of software-first satellites. It’s the largest all-equity Series A round in Finland and one of the most significant deals overall in the European space and defence sector. The purpose of the funding round is to support ReOrbit’s growth. The round consisted of a private placement reserved for professional and institutional investors, which included, e.g. Icebreaker.vc, Expansion VC, 10xFounders, Inventure VC, Varma Mutual Pension Insurance Company, and Elo Mutual Pension Insurance Company, and an EUR 8 million public share offering, which was oversubscribed within 4.5 hours. Springvest is a Finland-based investment firm that connects unlisted growth companies with investors. ReOrbit builds sovereign satellites and connected systems for national security.
Case published 9.9.2025
Castrén & Snellman advised the lead investors Ten Eleven Ventures and Tesi in the EUR 275 million Series B financing round of IQM Quantum Computers, the global leader in building quantum computers. The round is largest Series B round ever in Finland and the second largest in the Nordics. In addition to the lead investors represented by C&S, the round was participated by several new and existing investors, including pension funds Elo Mutual Pension Insurance and Varma Mutual Pension Insurance, strategic investors Companies of Schwarz Group and Winbond Electronics Corporation, and sovereign wealth funds EIC and Bayern Kapital. Ten Eleven Ventures is the original cybersecurity-focused, global, and stage-agnostic investment firm. The firm identifies, invests in, and helps grow top cybersecurity companies addressing critical digital security needs, leveraging its team, network, and experience to build successful businesses. Since its founding, Ten Eleven Ventures has raised over USD 1 billion and made over 60 cybersecurity investments across various stages worldwide. Tesi (Suomen Teollisuussijoitus Oy / Finnish Industry Investment Ltd) is a state-owned investment company with an industrial policy mission focused on driving economic growth, renewal, and investments. Tesi invests on market terms both in venture capital and private equity funds, and directly in startups, scale-ups, and large industrial projects. IQM Quantum Computers, founded as a deep tech spin-off from Aalto University in 2019, specialises in developing quantum computers utilizing superconducting circuits. The company designs and produces quantum processors at its facility in Espoo, providing computing solutions and optimizations tailored to both research and industrial applications. In addition to its Finnish operations, IQM has expanded its presence to Germany, France, Italy, Japan, Poland, Spain, Singapore, South Korea, and the United States.
Case published 4.9.2025
We represented Vapaus Group, a leading provider of employee bicycle benefit services, in its cross-border acquisition of Azfalte, a French corporate bicycle solutions company. The acquisition accelerates Vapaus Group’s international expansion and strengthens its position in sustainable mobility by combining Vapaus’s digital platform and circular-economy capabilities with Azfalte’s established enterprise programs and partner network in France. The transaction advances Vapaus’s growth strategy and increases its ability to help employers meet well-being and sustainability goals in one of Europe’s most dynamic cycling markets. Vapaus Group is at the forefront of sustainable mobility services and has been a pioneer in the employee bicycle benefit sector since 2020 with a vision to become the leading bicycle benefit service in Europe. Vapaus has automated the employee bicycle process through its technology platform, covering payroll, invoicing, logistics, insurance, and financing. Azfalte, founded in 2020, is a pioneer of corporate cycling in France, optimizing financing, tailored bikes, insurance, maintenance, assistance, training, and carbon tracking for the benefit of its clients.
Case published 1.9.2025
We acted as legal advisor to OP Finland Infrastructure LP in connection with the conversion of the fund’s agreed EUR 50 million convertible bond into shares in Lounea Net Oyj in 2023. In connection with the conversion, the fund made a new additional investment of EUR 10 million in Lounea. As a result of the arrangement, OP Suomi Infra became a significant owner of Lounea Net Oyj with a 29% stake. Lounea is a Finnish optical fibre operator whose business consists of telecommunications infrastructure and ICT solutions. OP Finland Infrastructure is a fund investing in Finnish infrastructure. The fund is managed by OP Financial Group.
Case published 29.8.2025
We advised Huelsenberg Holding, a German group holding company, in a transaction whereby its subsidiary Schaumann Agri Austria GmbH & CO. KG acquired the entire share capital of RV Eurotrading Oy. Eurotrading will continue to operate as an independent subsidiary within the Schaumann Group. The transaction does not affect Eurotrading’s products, services or customer agreements. Schaumann is one of Europe’s leading manufacturers of speciality mineral feeds, probiotics and biological silage additives. Eurotrading provides agricultural professionals with profitability-enhancing products and has been a Schaumann product representative in Finland for over 25 years. 
Case published 20.2.2025
We advised 24 Pesula group in a transaction where Juuri Partners made an investment in Finland’s largest self-service laundry chain, 24 Pesula. Juuri Partners’ investment supports 24 Pesula’s strategy of strengthening its domestic market leadership, developing digital services, and expanding internationally. 24 Pesula, founded in 1999, has established a strong market position in the self-service laundry market with over 50 locations in Finland. The company has its own production facilities in Nokia, Finland. In the UK, 24 Pesula currently operates in four locations, and the company plans to expand into other international markets in the coming years. Juuri Partners is a Finnish private equity company, which invests in Finnish growth focused SMEs and offers financing to established and profitable SMEs in Finland.
Case published 20.12.2024
We advised Tesi (Finnish Industry Investment Ltd) in its investment in the heavy duty vehicles company Oy Sisu Auto Ab. With this investment, Tesi became an owner in the company with a share of 24.4 per cent. Sisu Auto is a pioneer in the Nordic market in the development of heavy duty vehicles. Sisu’s core competences are in the product development and production of trucks and military vehicles. Tesi is a state-owned, market-driven investment company that invests in venture capital and private equity funds and directly in Finnish startups and growth companies. The investments managed by Tesi total 2.1 billion euros.
Case published 19.8.2024
We acted as the legal advisor to OP Finland Infrastructure LP in its investment in Cactos Fleet Finland Ky. Cactos Fleet Finland invests in smart electricity storage systems in Finland. OP Finland Infrastructure is a fund investing in Finnish infrastructure. The fund is managed by OP Financial Group. Cactos Fleet Finland primarily invests in electricity storage systems installed in real estate properties. In addition to their grid-related tasks, these systems can level out peaks in the property’s electricity consumption and provide back-up power. 
Case published 29.4.2024