Sade Mäntylä

KM Lawyer

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I mentor the talented trainees at our information service part-time. Our team manages library and information services, conducting comprehensive research and investigations across all areas of business law.

I am an analytical, holistic, and creative lawyer. I am currently working on a doctoral dissertation in sustainability law, with a particular focus on corporate responsibility and human rights issues. My expertise also includes legal design. I hold a master’s degree in both law and political science.

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Latest references

Ministry of the Environment – Report on the promotion of circular economy aspects in public procurement

Castrén & Snellman was commissioned by the Ministry of the Environment to carry out a study on how the Circular Economy Act could be used to promote circular economy aspects in public procurement. Our report provides valuable information to the working group tasked with preparing the new Circular Economy Act. The report includes an overview of relevant strategies, action programmes and policies, a look at relevant legislation and case law, an assessment of the current state of circular economy procurement and examples of integrating circular economy aspects into public procurement from around the world. We end the report with concrete conclusions and a proposal for a new circular economy provision with justification. The proposal aims to maximise the regulation’s effectiveness and minimise any adverse side effects. The final report is available on the Circular Economy Act project’s Gateway to Information (in Finnish). The study was carried out by Anna Kuusniemi-Laine, Sanna Aalto-Setälä, Lotta Huhtamäki, Marja Ollila, Laura Vuorinen, Paavo Heinonen and Anna Ylitalo.

CapMan Real Estate – Acquisition of a High-Quality Residential Asset

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.

Stena Line – Acquisition of NLC Ferry (Wasaline)

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.

Prisma Properties – Acquisition of a retail property

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.

SRV – Sale of SRV Infra

We advised SRV Group Plc in its sale of SRV Infra Ltd to Kreate Ltd. The completion of the transaction is subject to regulatory approvals. The parties expect the transaction to be closed by the end of 2025. SRV, established in 1987, is a Finnish developer and innovator in the construction industry. The company is listed on the Helsinki Stock Exchange. In 2024, SRV’s revenue totalled EUR 745.8 million.

Suomen Aurinkovoima – Financing arrangement to build solar parks

Castrén & Snellman acted as legal advisor to Suomen Aurinkovoima Oy and its owners in a financing tender process and a financing arrangement implemented with Danske Bank to secure financing for the company’s future solar park projects. Suomen Aurinkovoima, established by Oulun Seudun Sähkö, Oulun Energia, Vantaan Energia and Savon Voima, is a company focused on increasing domestic solar power. The company manages solar park projects from planning to implementation and maintenance, and its goal is to build dozens of new solar parks across Finland by 2030.

DNB Bank ASA – Lease and development of premises

We advised DNB Bank ASA in its agreement with Fennia Mutual Insurance Company on the development and lease of the premises at Fabianinkatu 8, Helsinki. With the lease agreement, DNB Bank ASA will focus all its Finnish operations at the Fabian 8 office. The other tenants at the renewed premises will be DNB Carnegie Investment Bank AB’s Finnish operations and DNB Auto Finance Oy. In connection with the long-term lease agreement, the parties also agreed on a major renovation project to completely refurbish the premises. The object of lease will be completed in the second half of 2027.

Yellow Film Studios – Merger of Yellow Film Studios and REinvent Studios

We advised Yellow Film Studios, the largest independent film and television production company in the Nordics, in its strategic merger with Danish film industry sales and financing studio REinvent Studios. Together they form Reinvent Yellow, a unified hub for television and film production, sales, financing and innovation, combining over three decades of production experience and a vast catalogue of titles.

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