Sini Tossavainen

Senior Associate, Member of the Finnish Bar

Services

  1. Dispute Resolution

Contact details

I specialise in dispute resolution. My area of practice covers both international and domestic court and arbitration proceedings. I advise our clients in commercial disputes ranging across a variety of different business sectors. I have extensive experience in complex commercial disputes relating to product liability, sale of goods, mergers and acquisitions, joint ventures and shareholder agreements, outsourcing, and procurement of data systems as well other commercial agreements. I have also advised clients on various contractual and regulatory matters.

Before joining Castrén & Snellman, I worked within dispute resolution at Nordic a law firm and at a Finnish boutique law firm.

Latest references

Excelerate Energy – Chartering an FSRU to Finland
We advised Excelerate Energy on the conclusion of a lease agreement with Gasgrid Finland Oy for the Floating Storage and Regasification Unit (FSRU) Exemplar. The Inkoo LNG terminal project will have a significant impact on securing the supply of gas to Finland and Estonia as imports of pipeline gas from Russia cease. The Exemplar is the first FSRU in Finland and the Inkoo LNG terminal project is legally unique. Moreover, the project, which is critical for Finland’s and the Baltics’ gas supply, was completed in an exceptionally short timeframe. Our experts assisted the company in a wide range of areas including contracts, energy legislation, licensing, labour law, taxation and structuring.
Case published 9.6.2023
Piippo – Sale of bale netwrap and baler twine machines and certain trademarks
We are acting as legal advisor to Piippo Plc in the sale of their bale netwrap and baler twine machines, related assets, and trademarks used in Piippo’s business to Portuguese Cotesi S.A. The sale of assets will be carried out in two phases and the final completion of the transaction is expected to occur during the first quarter of 2026. Piippo Oyj’s core business is baling nets and twine and it is one of the leading suppliers in the industry globally. The company’s global distribution network covers more than 40 countries. The company’s shares are listed on the First North Growth Market Finland operated by Nasdaq Helsinki Oy. Founded in 1967, Cotesi is one of the world’s leading producers of synthetic and natural twines, nets and ropes, with operations in Europe, North America and South America and its main production plant in Vila Nova de Gaia, Portugal.
Case published 17.4.2025
KKR – Acquisition of Karo Healthcare
We acted as Finnish legal adviser to KKR in connection with its acquisition of the entire share capital of Karo Healthcare from EQT. The transaction follows Karo’s significant strategic transformation from a Nordic specialty pharma business into a leading pan-European consumer healthcare platform, with an attractive product portfolio spanning core categories such as Skin Health, Foot Health, and Intimate Health, as well as Digestive Health and Vitamins, Minerals & Supplements. KKR & Co. Inc. (NYSE: KKR), is a leading global investment firm that offers alternative asset management as well as capital markets and insurance solutions. KKR sponsors investment funds that invest in private equity, credit and real assets and has strategic partners that manage hedge funds.  Completion of the transaction is subject to customary conditions and regulatory approvals. The transaction is expected to close in the coming months.
Case published 17.4.2025
Savings Banks Group – Sale of Sb Life Insurance
We advised the Savings Banks Group on an arrangement whereby the shares in Sp-Henkivakuutus Oy were sold to Henki-Fennia and at the same time the parties agreed on a long-term distribution cooperation for insurance savings and loan protection products. The closing of the transaction remains subject to regulatory approvals. Sb Life Insurance is a domestic life insurance company, established in 2007, offering insurance savings and risk insurance products to private customers and companies. The Savings Banks and Oma Säästöpankki Oyj act as agents for Sp-Life Insurance. Henki-Fennia is a subsidiary of Keskinäinen Vakuutusyhtiö Fennia, specialising in voluntary life, pension and savings insurance.
Case published 11.4.2025
Readpeak – Capital Investment
We advised Readpeak in an arrangement where Finnish growth fund Voland Partners made an investment in Readpeak. Readpeak is a service platform specialising in native advertising for purchasing, designing, and targeting the distribution of advertising space. Readpeak has quickly risen to a leading position with its platform solution, which enables an easy way to target and schedule communications as part of the news feed on media sites. Readpeak is a company founded in Helsinki in 2014, which has since expanded to nine European market areas and collaborates with over a thousand publishers. Readpeak redefines content-driven advertising using advanced machine learning models, creating added value for both quality media and journalism. Voland Partners is a minority investor specialising in the development of technology companies, with a mission to work together with entrepreneurs to build successful companies responsibly, creating success stories that benefit the entire society. Readpeak is Voland Partners’ sixth investment target, into which the fund company is investing from its first growth fund of 57 million euros.
Case published 10.4.2025
Nokian Brewery – Listing on First North
We advised Nokian Brewery Plc in its listing on Nasdaq First North Growth Market Finland. Investor demand in the IPO, which consisted of a public and institutional offering, was very strong and the IPO was oversubscribed. Nokian Brewery raised gross proceeds of approximately EUR 10 million from the IPO. In the IPO subscriptions were received from more than 2,900 investors and as a result of IPO the number of shareholders in the company increased to more than 4,700 shareholders. The IPO gives us a strong platform for the next years of growth. We are grateful to investors for their confidence and excited about what we can achieve together. This is the beginning of a new chapter in the Nokian Brewery story.  – Janne Paavola, CEO Trading in Nokian Brewery’s shares began on First North on 3 April 2025 with trading symbol BEER. Nokian Brewery is Finland’s second largest microbrewery and fifth largest brewery in terms of turnover in 2023. Nokian Brewery is particularly known for its Keisari beers. Nokian Panimo manufactures all its products at its production facility in Nokia, and in 2024 its sales volume totalled more than 8.3 million litres and turnover was EUR 11.9 million. Domesticity, responsibility and sustainable practices are at the heart of Nokian Brewery.
Case published 3.4.2025
Fingrid – Update of EMTN Programme
We advised Fingrid Oyj on the Finnish law aspects of the update of an EMTN programme and increase to EUR 3 billion. Notes issued under the programme may be admitted to trading on Euronext Dublin. Fingrid Oyj is Finland’s transmission system operator.
Case published 2.4.2025
Huhtamäki – Preparing for EU sustainability legislation
We advised Huhtamäki on the EU sustainability legislation and its impacts on Huhtamäki’s ESG strategy.  Our team focused on compliance with the ESG regulation and the actions required to further Huhtamäki’s ESG targets.
Case published 1.4.2025

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