28.9.2023

Marcus Blomfelt appointed as Senior Counsel and Piia Raappana and Yanhuan Zhou as Counsels

Our business is to enable our clients’ success and ensure their legal protection. To acknowledge their versatile expertise and dedicated work towards our clients’ success, we appoint Marcus Blomfelt as Senior Counsel and Piia Raappana and Yanhuan Zhou as Counsels as of 1 October 2023. Marcus was previously counsel at Castrén & Snellman, while Piia and Yanhuan were senior associates.

Marcus Blomfelt, Senior Counsel, Dispute Resolution

Marcus Blomfelt is an experienced dispute lawyer who specialises in complex litigation and criminal cases. He has assisted companies and their management in various criminal proceedings, including white collar, corruption and environmental criminal cases. In addition to handling criminal cases with distinction, he has extensive experience in disputes relating to, among other things, commercial agreements, M&A, sale of goods and agency agreements.

Marcus has particular expertise in private enforcement of competition law and has acted as counsel in the largest damages cases based on competition law in Finland.

Piia Raappana, Counsel, Intellectual Property

Piia Raappana is an expert in intellectual property law and dispute resolution. Her expertise includes industrial property rights and copyright as well as matters related to commercial agreements. In addition, she is well-versed in marketing and consumer law, media law and sports law.

Piia provides IP advise to our clients also in mergers and acquisitions, private equity transactions and other transactions.

The latest Managing Intellectual Property IP Stars recognised Piia as a Rising Star.

Yanhuan Zhou, Counsel, Mergers & Acquisitions

Yanhuan Zhou has extensive experience in demanding mergers and acquisitions as well as in restructuring of international companies. She advises clients in a wide range of domestic and cross-border mergers and acquisitions in various fields, such as the food industry, wholesale and retail, and heavy industry. She also specialises in various corporate matters.

Yanhuan’s key expertise lies in complex M&A with a multinational aspect. Lately, she has worked on several arrangements in which Finnish companies have exited their Russian operations. 

Our warmest congratulations to Marcus, Piia and Yanhuan for their new roles!

 

Read more: Castrén & Snellman appoints five new Senior Associates – an appointment also in Business Services

Latest references

We advised Efima Oyj on the sale of its financial management services business to Rantalainen as part of its strategic focus on fully concentrating on the delivery of business applications as well as data and AI solutions. As a result of the transaction, customer contracts related to financial management services and 65 experts working in these services will transfer to Rantalainen. The transaction will be carried out as a transfer of business, and the experts will move to the new owner as existing employees. Efima is a Finnish digital company that supports the sustainable growth of large and mid-sized companies by streamlining their business processes and by creating competitive advantage through the innovative use of artificial intelligence and data. The company has nearly 200 experts based in Helsinki and Tampere.
Case published 12.6.2026
We advised lead investor Ugly Duckling Ventures on the EUR 6.5 million funding round of Skyfora. The round also included Eviny Ventures, LUMO Labs and EIC Fund, alongside non-dilutive funding from Business Finland. The investment will support the commercial scale-up of Skyfora’s weather intelligence solutions, the expansion of partnerships with telecom operators, forecasting providers and meteorological institutions, and the continued growth of the team. Skyfora is a Finnish company developing high-resolution weather data solutions using patented technology that extracts atmospheric data from GNSS receivers embedded in existing infrastructure, such as telecom networks. By unlocking previously untapped data sources, Skyfora enables the next generation of AI-driven weather forecasting and supports improved decision-making across weather-sensitive industries. Ugly Duckling Ventures is a Copenhagen-based venture capital firm focused on early-stage Nordic B2B technology companies, with an emphasis on medtech, resilience tech and business services.
Case published 10.6.2026
castren snellman general atlantic iceye
We advised General Atlantic as the lead investor on ICEYE’s EUR 1 billion series F funding round, valuing the company at over EUR 10 billion. ICEYE raised EUR 450 million (USD 520 million) in a primary Series F funding round led by General Atlantic. Additional investors included Solidium, Tesi, Varma, Ilmarinen, Lifeline Ventures, Nokia, Qatar Investment Authority (QIA) and TCV. Together with a secondary placement, the total fundraising exceeds EUR 1 billion. ICEYE is the world leader in sovereign intelligence from space, providing continuous monitoring capabilities to detect and respond to changes in any location on Earth. The company operates the world’s largest and most advanced Synthetic Aperture Radar satellite constellation. General Atlantic is a leading global investor with more than four and a half decades of experience providing capital and strategic support for over 885 companies throughout its history. As of March 31, 2026, General Atlantic manages approximately USD 126 billion in assets across its investment strategies. We advised General Atlantic on this transaction in collaboration with the international law firm Paul, Weiss, Rifkind, Wharton & Garrison.
Case published 9.6.2026
We advised Oomi Solar Oy on the sale of a solar power park and battery energy storage project to Tuulipolar Oy. The transaction concerned a 24 MWp solar power plant and a 36 MW / 70 MWh battery energy storage system (BESS) to be constructed in Tornio. Tuulipolar Oy will act as the owner and operator of the plant, while Oomi Solar Oy will be responsible for its design and construction. The project will form the world’s northernmost industrial hybrid power plant, contributing to Finland’s green energy transition by increasing renewable energy production and electricity storage capacity in Northern Finland. The hybrid solution enables optimization of production as well as active participation in electricity markets and reserve services, improving the project’s profitability and supporting the balance of the electricity system year-round. Electricity production from the hybrid plant is expected to begin in 2028. Oomi Solar Oy is a Finnish renewable energy expert with experience from nearly 200 MW of installed solar capacity. The company helps businesses and communities accelerate the green transition by offering comprehensive solutions, including solar power plants, energy storage systems, and related lifecycle services from project development to maintenance. Oomi Solar Oy employs more than 20 energy professionals and delivers solar power projects across Finland. The company’s vision is to be Finland’s most desired partner for solar energy and energy solutions.
Case published 5.6.2026