20.9.2016

Preliminary Tax Rulings – Tax Disputes Avoidable through Proactive Planning

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Careful planning is often the key to a successful arrangement, and it is possible to get definitive answers to questions that are open to interpretation through a ruling of the Finnish Tax Administration. The Tax Administration has recently focused on improving cooperation with its customers and has encouraged companies to actively apply for written preliminary rulings and even engage in preliminary discussions concerning more challenging arrangements.

We have assisted Finnair and Municipality Finance, among others, in arrangements that involved significant income tax questions, which we resolved by applying for preliminary rulings. In the following, we describe a few of our recent case references involving preliminary rulings.

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Tax Disputes – A Key Part of Corporate Financial Administration

Disagreements that arise in the tax assessment and in tax audits often lead to lengthy appeal processes that sap time and resources from a company’s management and financial department. We advocate a pre-emptive approach to avoid problems through careful analysis of tax issues, diligent reporting and smooth communication with the tax authorities. Should you nevertheless find yourself facing a tax dispute, whether domestic or international in nature, you will be able to rely on our renowned dispute resolution team to defend your interests. We will also provide you with the best possible assistance in handling tax complaint processes if your company is subject to a tax audit or if the Finnish Tax Administration intervenes in any arrangements at a later date.

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.

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