ESG and Corporate Sustainability

ESG and Corporate Sustainability

Sustainability and ESG regulations concern companies of all sizes – either directly or indirectly.

Sustainability is the true success factor of modern business. It ensures continuity of operations and transcends a company’s strategy, value chains and business practices. The regulatory framework of corporate sustainability is taking shape at a rapid pace, and evolving regulations concern companies of all sizes – either directly or indirectly.

The ESG and corporate sustainability service at Castrén & Snellman is the leading ESG practice among Finnish law firms. Our service is built around a multi-disciplinary approach that brings together legal expertise across all three pillars of ESG – environmental, social and governance – to deliver integrated advice. Our clients include a wide range of companies from family-owned businesses to listed companies. Our particular focus in ESG advice includes mergers and acquisitions, contract negotiations, and investigations.

Comprehensive and strategic ESG advisory

We conduct ESG due diligence reviews and provide analysis of the reviewed company’s ESG practices and risk management. We monitor the latest developments in ESG regulation for our clients and provide training in the legal aspects of corporate sustainability that is under continuous change.

As a member of the Net Zero Lawyers Alliance, we are committed to support our clients with extensive legal services they need in their transition to net zero.

We integrate our ESG knowhow across all services in our firm. Our experts can assist you in various areas:

ESG, compliance, corporate governance and management liability
Supply chain due diligence
ESG-related investigations
ESG in commercial contracts
Sustainable transactions and ESG due diligence
Sustainable finance
Green and just transition projects
Regulation and litigation on green and sustainability claims
Environment, Infrastructure & Natural Resources
Sustainability-linked competition law analysis and procurement
Advice on EU taxonomy

Latest references

Efima – Sale of financial management services business

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.

Ugly Duckling Ventures – EUR 6.5 million funding round of Skyfora

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.

castren snellman general atlantic iceye

General Atlantic – ICEYE’s EUR 1 Billion Series F Funding Round

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.

Oomi Solar – Sale of a Solar Power Plant and Battery Energy Storage Project

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.

Latest insights

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