Ida Illman

Associate, Master of Laws

I advise our domestic and international clients on assignments related to technology, data, and contract law. In addition, I assist clients with matters concerning intellectual property, consumer protection, and marketing law.

I graduated from the University of Helsinki in the summer of 2025. My thesis focused on the Data Act and the protection of trade secrets, reflecting my interest in analysing how the new data and digital legislation and the technological development are reshaping traditional legal frameworks and the business environment.

Before joining Castrén & Snellman, I gained experience in various trainee roles in both the private and public sectors, including working on technology and intellectual property matters at another law firm and on contract law issues in the public healthcare sector.

Latest references

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 G&W Electric with its acquisition of Safegrid Oy, a leading provider of intelligent grid monitoring solutions based in Finland. The acquisition accelerates G&W Electric’s long-term strategy to integrate intelligent monitoring and predictive analytics into its power distribution portfolio, strengthening its offering to utility customers worldwide. Founded in 1905 and headquartered in Bolingbrook, Illinois, G&W Electric is a global leader in innovative power grid solutions, with a presence in over 100 countries. The company is known for advanced load and fault interrupting switches, reclosers, sensors, system protection equipment, power grid automation, intelligent grid monitoring, and transmission and distribution cable accessories. Safegrid is a Finnish technology company headquartered in Espoo, Finland. The company develops the Intelligent Grid System®, a grid monitoring solution that combines instant-on wireless sensors with advanced analytics to deliver real-time insight into grid conditions, enabling utilities to identify emerging issues, anticipate failures, and reduce outage duration across medium and high voltage distribution and transmission networks.
Case published 8.5.2026
We advised General Catalyst as lead investor on ICEYE’s EUR 150 million series E funding round, valuing the company at EUR 2.4 billion. ICEYE is the world leader in synthetic aperture radar (SAR) satellite systems and operates the largest SAR constellation globally. Its technology delivers objective, near real-time Earth observation in any weather or light conditions, enabling governments and institutions to manage risks and respond faster. General Catalyst is a global investment and transformation company, partnering with leading entrepreneurs to build toward global resiliency and applied AI. Its portfolio includes companies such as Airbnb, Snap, Stripe, Mistral AI, Hubspot, Anduril, Helsing and Legora. We advised General Catalyst on this transaction in collaboration with the US law firm Goodwin. 
Case published 8.12.2025
We acted as Finnish law legal adviser to the lenders and the export credit agencies in connection with the EUR 514.4 million green project financing for the development and construction of Easpring Finland New Materials Oy’s cathode active material (CAM) manufacturing plant in Kotka, Finland. The borrower, Easpring Finland New Materials Oy, is a joint venture owned by Beijing Easpring Material Technology, Finnish Minerals Group and LG Energy Solution. The financing was provided by six international commercial banks, with Société Générale acting as financial adviser and mandated lead arranger together with Natixis as co-mandated lead arranger, and DNB, ICBC, ING and Standard Chartered participating as lenders, with support from the export credit agencies Finnvera and Sinosure. The project represents a significant milestone for Finland and the European battery value chain by strengthening Europe’s domestic supply of cathode active materials, a key component in lithium-ion batteries for electric vehicles and energy storage applications. Once the first phase of the project is operational, the Kotka facility is expected to produce approximately 60,000 tonnes of cathode active material annually, making it one of the largest CAM production plants in Europe and supplying leading battery manufacturers across Europe. 
Case published 21.7.2026
We acted as Finnish legal advisor to Delta Capacity in connection with its acquisition of the ready-to-build Karppio battery energy storage system (BESS) project from Helios Nordic Energy. The acquisition was made and the project will be implemented together with Strioga Family Foundation. The Karppio BESS project is located in Teuva, Finland, and has a capacity of 125 MW / 300 MWh. Delta Capacity will lead the remaining development of the project through to commissioning, planned for 2027, and will serve as long-term asset manager. Delta Capacity is a Swiss-based developer of utility scale battery storage systems. The acquisition adds to Delta Capacity’s growing Nordic portfolio. 
Case published 20.7.2026
We advised Swedbank AB (publ) on the refinancing of a large Finnish retail real estate portfolio owned by Trophi’s Finnish subsidiaries. Trophi is the leading Nordic real estate company focusing on grocery anchored retail properties, with 278 properties across Sweden and Finland. Finland is a market that continues to develop and is also strategically important for Trophi, accounting for approximately 30% of Trophi’s letting and property value.
Case published 17.7.2026
We are acting as Finnish legal advisor to HANZA in connection with its acquisition of Fortaco Finland’s heavy mechanics and assembly business. The transaction is structured as a combined asset and share acquisition and includes Fortaco Finland’s heavy mechanics and assembly operations in Finland, as well as shares in two Estonian and two Polish subsidiaries. The transaction is expected to close during the fourth quarter of 2026, subject to customary closing conditions, including regulatory approvals. Founded in 2008, HANZA is a Swedish mechanical engineering and electronics contract manufacturing company listed on the Nasdaq Stockholm main list. HANZA has approximately 5,000 employees and annual sales of SEK 10 billion. We advise HANZA on this transaction in collaboration with the Swedish law firm Lindahl.
Case published 15.7.2026
We acted as Finnish counsel to RVRC Holding AB (RevolutionRace) in its acquisition of 90.1% of the shares in ICANIWILL AB (ICIW). Mannheimer Swartling (Sweden) acted as lead counsel for RevolutionRace. ICIW, founded in Sweden in 2012, is a Swedish training apparel brand.  RevolutionRace is a fast-growing Swedish outdoor brand offering multifunctional products to people with an active lifestyle. The company operates with a digital D2C business model reaching customers in approximately 40 countries. The company is listed on Nasdaq Stockholm since 2021. 
Case published 14.7.2026