Iris Brisson

Senior Associate, Member of the Finnish Bar

Services

  1. Dispute Resolution

Contact details

I advise our clients in assignments relating to dispute resolution. My main areas of practice are domestic and international court and arbitration proceedings.

Prior to joining Castrén & Snellman, I worked as an associate with the dispute resolution team of another Finnish law firm and as an in-house lawyer for a global company manufacturing mobile phones. During my studies, I gained valuable work experience by working as a trainee at reputable Finnish law firms and by completing an internship with one of the case management teams of the ICC International Court of Arbitration in Paris.

I hold a Master of Laws degree from the University of Helsinki.

Latest references

Energy company – Dispute arising from an energy supply agreement
We represent a major energy company in arbitration. The dispute has arisen out of a long-term energy supply agreement and the value of the claims is approximately EUR 33 million.
Case published 19.9.2023
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
LähiTapiola and OP Henkivakuutus – Successful representation of insurance companies in Supreme Administrative Court health data processing cases
We successfully represented insurance companies LähiTapiola and OP Henkivakuutus in two cases concerning an important point of principle: the right of insurance companies to process health data as part of the insurance application process. The Supreme Administrative Court handed down twin decisions ( one published as precedent ) addressing the matter in light of contrary DPA decisions. Under the Finnish Data Protection Act, insurance companies may, to simplify, process health data concerning “insured persons” (vakuutettu, försäkrad) to determine liability under the insurance. This rule constitutes an exception to Article 9 GDPR. At issue was whether the term “insured person” also covers people in the process of obtaining insurance coverage or only people who are already covered. In more practical terms: can an insurance company rely on the rule when considering whether/how to grant the insurance in the first place? The SAC answered in the affirmative and thus upheld the traditional industry approach over the DPA’s contrary view. The SAC noted that the Data Protection Act did not define the term “insured person” and thus looked at insurance legislation for guidance. As argued by the insurance companies, that legislation also uses the term in the context of describing the insured person’s pre-contractual informational obligations. Thus, and in view of the underlying purpose of the rule at issue, the SAC found that an “insured person” could be someone in the process of obtaining coverage, not just a person already covered. The outcome clarifies the scope of the local rule at the insurance application stage for the Finnish insurance industry.
Case published 22.1.2026
Taaleri – AI workshop
Castrén & Snellman organised a practical AI workshop for Taaleri’s lawyers, combining the basic principles of AI thinking with practical applications in a legal environment. The training utilised use cases that were designed in collaboration based on Taaleri’s own materials. Participants found the use cases particularly useful and noted that what they had learnt was readily applicable to their daily work. The training was delivered by Castrén & Snellman’s legal technology experts with a legal background, and participants praised their strong expertise in both legal technology and its application in a legal environment. ‘Our team gained valuable insights into leveraging AI, which will continue to support our organisation’s AI journey,’ says Irina Bergström, Development Manager at Taaleri.
Case published 19.1.2026
Puhdistamo – PK Consumer Health invests in Puhdistamo
We advised the shareholders in Puhdistamo – Real Foods Oy in the sale of all shares in Puhdistamo to PK Consumer Health. Puhdistamo is a leading Nordic wellbeing company, best known for its high-quality supplements, sports nutrition products and, functional beverages. Puhdistamo employs 120 employees in Finland and Sweden. PK Consumer Health is owned by Avista Healthcare Partners and Damier Group. The sellers will make a reinvestment into PK Consumer Health as part of the transaction. Completion is subject to customary closing conditions.
Case published 15.1.2026
Urban Partners – Financing of EUR 100 million construction project in Herttoniemi, Helsinki
We advised the real estate investor and developer Urban Partners in the financing of a EUR 100 million construction project in Helsinki, which combines build-to-rent housing and care homes within one scheme.  A fund managed by Urban Partners (NSF V) purchased the plot of land in Herttoniemi, Helsinki and subsequently secured planning consent to deliver a hybrid living scheme. The modern complex will offer high-quality housing and care facilities for the elderly alongside rental accommodation. A total of 425 apartments and 108 care homes will be delivered across four buildings on the site.  The project will be implemented in accordance with Urban Partners’ sustainability targets. All buildings will be constructed to energy class A, and the project will aim for the highest Platinum level of the international LEED environmental certification and will be implemented in accordance with the EU taxonomy criteria.
Case published 5.1.2026
Citycon – Sale of a 275-apartment residential portfolio
We assisted Citycon Oyj in the sale of the Lippulaiva residential assets in Espoo, Finland. The sold residential assets consist of 275 apartments totaling approximately 13,000 sqm, located in connection to Citycon’s Lippulaiva shopping centre. The assets were sold at their latest IFRS book value for a gross purchase price of EUR 61.5 million.
Case published 19.12.2025
S-Bank – Issuance of EUR 150 million SNP notes and tender offer for notes maturing in 2026
We advised S-Bank Plc in its issuance of a EUR 150 million Senior Non-Preferred Notes and on the tender offer of its EUR 150 million Senior Preferred MREL Eligible Notes maturing in 2026. The tender offer required prior approval from the Finnish Financial Stability Authority based on the Commission’s regulatory technical standards (EU) 2023/827. The Stability Authority granted S-Bank a permission for repurchases of the notes. Based on the permission, S-Bank replaced the notes with own funds or eligible liabilities instruments of equal or higher quality at terms that are sustainable for the income capacity of S-Bank. According to the final tender offer results published on 10 December 2025, S-Bank repurchased a total of EUR 97.9 million of the notes. The new notes will pay a floating interest rate, which is determined based on 3-month Euribor added with a margin of 1.35 per cent. The notes were issued on 11 December 2025 and listed on Nasdaq Helsinki Ltd. The maturity date of the notes is 11 December 2029. The purpose of the issue was to meet the minimum requirement for own funds and eligible liabilities (MREL) and to finance the bank’s activities.
Case published 18.12.2025

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