Janne Juusela

Janne Juusela

We offer comprehensive advice in the fields of wealth management and marital property and inheritance law, combining tax aspects and family-law related risk management.

As a trusted partner for owner-entrepreneurs, family-owned businesses, and wealthy private individuals, our clients enjoy seamless, one-stop access to all the legal advice they need, ensuring that the strategic understanding of how they want their wealth to be managed remains crystal clear at all times.

When it comes to planning a business succession and the related ownership strategy, our support helps you identify how to pass on your business to the next generation in a viable way that respects the family’s wishes. We draft documentation under family law and contract law to prepare for situations where life doesn’t go according to expectations. We also update such documentation after a business transaction if the seller has acquired a substantial fortune as a result of the sale.

Advising estates on matters related to inheritance and estate taxation is another area of our expertise. We assist parties to an estate in resolving inheritance disputes and settling issues that are open to interpretation. We will also help you with taxation issues by applying for preliminary rulings and other pre-emptive guidance from the Tax Administration and by representing you in potential tax disputes. In tax-related administrative procedures, we screen all matters in advance to avoid any risk of criminal proceedings that may arise due to factors such as reporting errors.

We also offer support for all your other business legal needs from corporate governance to M&A and beyond. Your trusted personal advisor will act as your single point of contact and compile a team of experts with comprehensive legal insight and close contacts with business life to match your specific needs. We also work in close collaboration with major banks and asset management companies.

Our clients appreciate our straightforward and practical approach and our ability to explain legalese in plain language. Our expertise has also received international recognition: Chambers High Net Worth Finland Guide 2024 has ranked our team in Band 1 for Private Wealth Law.

Our services include

  • Wealth management planning
  • Planning and execution of ownership structures
  • Structuring and carrying out succession in a family business
  • Marital property and inheritance law related tax matters
  • Applications for preliminary ruling and other pre-emptive guidance
  • Tax litigation

Latest references

Castrén & Snellman advised Nscale, a European AI infrastructure company, in connection with its planned data centre project in Harjavalta, Finland. The facility will be located in the Sievari industrial area. Castrén & Snellman’s advisory role encompassed the negotiation and execution of a site securing and development agreement (SSDA) with Fortum, as well as the preliminary land sale process for the Sievari site with the Town of Harjavalta. Under the SSDA, Fortum supports the advancement of Nscale’s project development, including grid connection design and permitting.
Case published 15.4.2026
We are acting as legal adviser to Taaleri Plc on its acquisition of a 51 per cent ownership stake in Nordic Science Investments Oy (NSI), marking Taaleri’s expansion into deeptech-driven venture capital. Through the transaction, Taaleri broadens its private equity offering into early-stage venture capital funds as well as the commercialisation and scaling of research-driven innovations. NSI is a Finnish venture capital fund manager operating across the Nordic and Baltic regions, focusing on early-stage investments in research- and science-based technologies. Its portfolio companies develop, among other things, health technologies, life sciences, advanced materials and AI-driven solutions. In addition to providing growth capital, NSI supports spin-out companies with strategic guidance, access to networks and assistance in building teams during the early phases of business development. NSI’s first fund, the EUR 45 million NSI Nordic Science I Ky, was established in 2024 and has to date invested in 22 early-stage companies in Finland, Sweden and the Baltic countries. Taaleri is a specialist in investments, private asset management and non-life insurance, with a strong position in renewable energy, bioindustry and housing investments as well as credit risk insurance. Taaleri has EUR 2.7 billion of assets under management in its private equity funds, co-investments and single-asset vehicles, employs approximately 130 people and is listed on Nasdaq Helsinki. The founders of NSI will continue in their operational roles following the transaction. The completion of the transaction is subject to approval by the FIN-FSA.
Case published 13.4.2026
We delivered two information design workshops for the legal department of the Finnish Centre for Pensions, with participants from both legal and other professional backgrounds. In the sessions, we applied the principles of legal design thinking to the Finnish Centre for Pensions’ field of operation and background materials, also utilising AI as a design tool. The participants found the tailored training highly useful and commended the trainers for their in-depth familiarisation with the Centre’s opinion drafting process and operating environment. As a result of the workshops, our experts proposed a new structural and linguistic model for the legal department of the Finnish Centre for Pensions for drafting opinions and guidelines. The proposal was well received as clear and applicable to the participants’ everyday work. In addition, we presented tailored AI use cases to support experts, allowing for a more efficient AI-assisted way of working. Our experts who delivered the workshops combined their legal expertise with their leading experience in legal design. The participants appreciated this versatile expertise, which enabled a knowledgeable, creative and applied approach to legal writing. ‘C&S created a well-structured training tailored to our needs, providing clear direction for our organisation and concrete takeaways for our experts in their day-to-day work,’ says Mari Kuunvalo, Head Of the Legal Department at the Finnish Centre for Pensions.
Case published 10.4.2026
We advised Aktia Bank Plc on the issuance of an EUR 80 million Additional Tier 1 (AT1) bond. The bond pays a fixed interest rate of 6.75 per cent semi-annually. The bond is perpetual, and Aktia has the right to redeem or repurchase it in accordance with the terms of the bond, subject to certain conditions. The bond was issued on 1 April 2026. In addition, we assisted Aktia in listing the bond on the Nasdaq Helsinki Ltd stock exchange. For the listing, we prepared Finland’s first EU Follow-on prospectus for a bond. The EU Follow-on prospectus was introduced on 5 March 2026 with an update to the Prospectus Regulation (EU) No. 2017/1129. The EU Follow-on prospectus is a new type of prospectus that can be used, among others, by issuers whose securities have been admitted to trading on a regulated market continuously for at least the 18 months preceding the offer to the public or the admission to trading on a regulated market of the new securities. A follow-on prospectus is simpler than a so-called traditional prospectus, and it is intended to avoid repeating information that the issuer has already disclosed. Nordea Bank Abp acts as the sole structuring advisor for the issue of the Notes. Nordea Bank Abp, Danske Bank A/S and ABN Amro Bank N.V. act as the lead managers for the issue of the Notes. 
Case published 7.4.2026