Janne Koivisto

Associate, Master of Laws, Master of Arts

I advise our clients on intellectual property rights as well as data and technology issues. I also have experience in marketing assignments and matters concerning pharmaceutical, pharmacy and food law.

Before accomplishing my dream of becoming a lawyer, I worked as a journalist. I am excited at the prospect of delving into a client’s legal issue and finding the best solution for that particular client’s business.

Clients and colleagues have praised me on my thoroughness, analytical approach and collaborative skills. Working as a journalist developed my ability to gather and analyse information and to present it in a concise and understandable format. These skills are also important in my work as a lawyer.

Latest references

We are acting as legal adviser to Stena Line on its acquisition of NLC Ferry Ab Oy (Wasaline), strengthening Stena Line’s position in the Baltic Sea and enabling it to take over operations of the ferry route between Umeå in Sweden and Vaasa in Finland. The acquisition further strengthens Stena Line’s position as one of the leaders in sustainability within the ferry industry and enhances the company’s access to alternative fuels whilst providing a strong intermodal transport link towards Gothenburg and Trelleborg, and onwards to the European continent. NLC Ferry, operating under the auxiliary name Wasaline, were owned by Kvarken Link, a company jointly owned 50/50 by the cities of Umeå and Vaasa. Wasaline is the world’s northernmost shipping company, operating daily passenger and freight services between Vaasa, Finland and Umeå, Sweden, and is the first carbon-neutral ferry operator in the Baltic Sea with its hybrid vessel, Aurora Botnia, which runs on biogas and batteries. Stena Line is one of Europe’s leading ferry operators, with 20 routes across the continent. The company is family-owned, was founded in 1962 and is headquartered in Gothenburg, with 6,550 employees and an annual turnover of 19.6 billion SEK. The transaction is conditional to the approval of the respective municipal councils of Umeå and Vaasa as well as customary closing conditions such as authority approvals. The completion of the transaction is expected to take place in the beginning of the year 2026. Castrén & Snellman is collaborating with CMS Wistrand, Stena Line’s advisor on Swedish law matters in connection with the transaction.
Case published 4.11.2025
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 are acting as the joint legal advisor to Oomi Oy and Lumme Energia Oy in a transaction whereby Lumme Energia will merge with Oomi. As from the completion of the merger, the combined entity will be the largest electricity retail and service company in the Finnish market. In 2024, Oomi reported a turnover of EUR 373.9 million and had approximately 110 employees. Lumme Energia’s turnover for the same year was approximately EUR 314.6 million and it had approximately 50 employees. The transaction is primarily driven by the recent developments in the electricity market and the strategic goal to develop competitive products and services. Another key objective is to further enhance the customer experience, which is a shared value between the two companies. As a result of the merger, Lumme Energia’s customers will transfer to Oomi, and Lumme Energia will become one of Oomi’s shareholders. The completion of the transaction is subject to an approval by the Finnish Competition and Consumer Authority.
Case published 29.8.2025
We advised Lantmännen ek för in its contemplated acquisition of Leipurin from Aspo Plc. Lantmännen is an agricultural cooperative and Northern Europe’s leader in agriculture, machinery, bioenergy and food products. Lantmännen is owned by 17,000 Swedish farmers and has 12,000 employees in over 20 countries. Leipurin is a leading Nordic supplier of bakery ingredients, equipment, and expert services to professional bakeries, confectioneries, and food manufacturers. The company operates across Finland, Sweden, and the Baltic countries with subsidiaries located in the aforementioned countries, providing comprehensive solutions to the baking industry. The closing of the transaction remains subject to regulatory approvals.
Case published 25.8.2025
We advised Aker Arctic Technology Inc, a company specialised in icebreaker design, in its acquisition of Bluetech Finland Ltd. Under the signed agreement, Aker Arctic and Bluetech transferred to the ownership of Arctic Marine Technology Group Oy, an entity established for the purpose of owning the companies. Arctic Marine Technology Group is owned by Finnish Industry Investment (Tesi) and ABB, the current shareholders of Aker Arctic. The completion of the transaction required the approval of the Finnish Ministry of Economic Affairs and Employment and the fulfilment of other customary closing conditions. Aker Arctic Technology Inc is a private company specialising in the technology development, design, engineering, special products, consulting and testing services for ice-going vessels and icebreakers. Bluetech Finland Ltd specialises in cruise, ro-pax and cargo ship design, offering engineering services for ship owners, shipyards and marine suppliers.
Case published 26.6.2025
We advised Valio Oy in its acquisition of Raisio Oyj’s plant protein business, related fixed assets and the Härkis® and Beanit® fava bean brands. The fixed assets include, among other things, the production equipment of the factory that makes plant protein products in Kauhava. The transaction supports Valio’s strategy to grow from a dairy company to a food company. This business acquisition will make us an even more significant developer and producer of plant-based protein products. The demand for these products will grow in the long term, and a great deal of growth potential still remains. In 2022, we acquired the Gold&Green® business and, since then, we have been carrying out strong product development and renewed the brand. Following successful product launches, sales in the last quarter of 2024 increased by about 50% from the previous quarter. With this acquisition, we are building our own production capacity. The production equipment of the Kauhava factory is just right for our needs and situation. says Kimmo Luoma, Valio’s Senior Vice President. Valio is a Finnish dairy and food company founded in 1905 and owned by Finnish dairy cooperatives. Valio has subsidiaries in Sweden, Estonia, the United States and China. In 2023, the Group had a turnover of EUR 2 278 million and more than 4 000 employees.
Case published 14.2.2025
We advised CapMan Real Estate in the acquisition and financing of a high-quality residential asset located in Katajanokka, Helsinki.  The asset was acquired from the Finnish Seamen’s Service Bureau (MEPA).  The property consisting of 38 modern rental apartments with a parking garage was completed in 2017. The building features high-quality construction, modern floorplans, and well-designed communal areas including a gym and rooftop sauna premises, and blends with the area’s historic maritime character. The residential asset is located in the prestigious Katajanokka seaside district of central Helsinki, known for its architectural heritage and proximity to the city centre. The property has a high ESG profile which will be further improved by CapMan Real Estate.
Case published 6.11.2025
We advised Prisma Properties in a real estate transaction in which the company acquired a retail property in Helsinki from Hartela.  The acquired property was built specifically for the discount retailer Jula. Completed in October 2025, the property is modern and very energy-efficient, and it is fully leased to Jula under a 10-year lease agreement. The property located in the Konala district, adjacent to the busy Ristikko shopping centre, spans 2,600 square metres. Prisma Properties is a fast-growing developer and long-term owner of modern properties for discount retail, grocery retail, and quick-service restaurants. The company operates across the Nordics and manages a property portfolio valued at approximately EUR 650 million, primarily consisting of newly developed properties with long lease agreements.
Case published 29.10.2025