Jussi Nieminen

Partner, Member of the Finnish Bar

I am the head of our Competition & Procurement service and co-head of our Compliance & Investigations service. I specialise in competition law, state aid and public procurement matters.

I advise clients in all matters related to Finnish and EU competition law and have wide expertise and long experience in complex merger control proceedings, investigations and litigation cases concerning competition infringements, competition law analysis and strategic compliance advice. I have advised clients in many significant domestic and international matters related to merger control or competition law across a wide range of industries.

I also advice in various matters related to FDI proceedings and commercial contracts.

I approach legal matters in a comprehensive but pragmatic and solution-oriented manner.

I have been ranked by the international publications Chambers Europe and The Legal 500 among Finland’s leading competition law experts. In addition, Who’s Who Legal has listed me as a Future Leader in Competition matters.

Latest references

We acted as Finnish legal adviser to KKR in connection with its acquisition of the entire share capital of Karo Healthcare from EQT. The transaction follows Karo’s significant strategic transformation from a Nordic specialty pharma business into a leading pan-European consumer healthcare platform, with an attractive product portfolio spanning core categories such as Skin Health, Foot Health, and Intimate Health, as well as Digestive Health and Vitamins, Minerals & Supplements. KKR & Co. Inc. (NYSE: KKR), is a leading global investment firm that offers alternative asset management as well as capital markets and insurance solutions. KKR sponsors investment funds that invest in private equity, credit and real assets and has strategic partners that manage hedge funds.  Completion of the transaction is subject to customary conditions and regulatory approvals. The transaction is expected to close in the coming months.
Case published 17.4.2025
We advised Gasum in chartering a new LNG and bio-LNG bunker vessel. The vessel called Celsius will serve Gasum’s customers starting 2027. The investment is part of Gasum’s strategy to secure the availability of LNG and bio-LNG to its customers in the Northwestern European area as demand increases in the coming years. Gasum is a Nordic gas sector and energy market expert. Gasum offers cleaner energy and energy market expert services for industry and for combined heat and power production as well as cleaner fuel solutions for road and maritime transport. The company helps its customers to reduce their own carbon footprint as well as that of their customers. Sirius is a Swedish shipping company founded by the Backman family. Sirius operates 11 product/chemical tankers and 2 LNG tankers and has a further 3 product/chemical tankers under commercial management.
Case published 11.3.2025
We are acting as a counsel to Fortum in a transaction in which Fortum is strengthening its renewable power project pipeline through the acquisition of a project development portfolio from Enersense. The debt-and-cash free purchase price is approximately EUR 9 million, with the potential for project-specific earn-outs subject to projects successfully reaching a final investment decision in the future. The transaction is subject to customary closing conditions and is expected to be completed during the first quarter of 2025. Fortum is a leading Nordic energy company with the purpose to power a world where people, businesses and nature thrive together. Fortum’s core operations comprise of efficient, CO2-free power generation as well as reliable supply of electricity and district heat to private and business customers. The company is listed on Nasdaq Helsinki. One of Fortum’s strategic targets is to develop at least 800 MW of ready-to-build onshore wind and solar projects by the end of 2026.
Case published 19.12.2024
We advised Helkama-Autokauppa Oy in the acquisition of the Škoda dealerships in Helsinki and Tampere from Hedin Automotive Finland. Helkama-Autokauppa Oy operates as an independent dealer in the dealer network of Helkama-Auto Oy, the Finnish importer of Škoda cars, spare parts and accessories.
Case published 3.12.2024
We acted as legal advisor to OP Finland Infrastructure LP in its investment in ESL Shipping Ltd, a Finnish shipping company. Varma Mutual Pension Insurance Company co-invested in the company. The investment was made against new shares in ESL Shipping, and  the EUR 45 million co-investment  corresponds to a  21.43 % holding in the company. The aim of the investment is to accelerate ESL Shipping’s green transition. ESL Shipping Ltd is a Finnish shipping company. Its main shareholder is Aspo Plc. OP Finland Infrastructure is a fund investing in Finnish infrastructure. The fund is managed by OP Financial Group. Varma Mutual Pension Insurance Company is a Finnish pension insurance company. In September 2023 the value of its investment portfolio amounted to EUR 57.5 billion. 
Case published 26.4.2024
We acted as the lead counsel to REMONDIS Group and REMONDIS Maintenance & Services International GmbH in a cross-border acquisition of all the shares in Delete Group Oyj from its shareholders, including Axcel, a Nordic private equity firm. The redemption of all Delete Group’s outstanding senior secured notes was also carried out in connection with the transaction. The acquisition complements REMONDIS Maintenance & Services’ existing industrial cleaning business and marks the entry of the REMONDIS Group to the Finnish market. As a result of the transaction, Delete Group became the third industrial cleaning services company in the REMONDIS Group, alongside BUCHEN Industrial Services and REYM. Operating in Finland and Sweden, Delete Group is one of the leading providers of high-quality industrial cleaning services. It employs approximately 675 professionals in 29 locations. The sale and purchase agreement was signed in May 2023. The transaction was notified to the competition authorities in Finland and Sweden. We assisted REMONDIS in notifying the Finnish Competition and Consumer Authority. Mannheimer Swartling advised REMONDIS in matters under the laws of Sweden. REMONDIS Maintenance & Services belongs to the REMONDIS Group, one of the world’s largest recycling, service and water companies. REMONDIS employs more than 40,000 employees all around the globe in over 30 countries.
Case published 5.12.2023
Castrén & Snellman is the trusted partner for companies in the insurance sector both in Finland and internationally. We have assisted our clients in matters such as obtaining authorisation for activities transactions, such as insurance portfolio transfers and ownership control processes system acquisitions disputes outsourcing arrangements sales, marketing and insurance distribution matters. We have extensive experience in the insurance sector and decades of collaboration with supervisory authorities. We offer our clients our internationally recognised competence, clear thinking and solution-oriented experts.
Case published 5.12.2023
We advised Sodexo in connection with the sale of its minority shareholding in Epassi Group Oy, alongside the majority shareholder Bregal Milestone and other minority shareholders, to TA Associates and Warburg Pincus. Epassi is a market leader in the provision of employee benefits within the Nordics, the UK and Italy. The unique solution combines all benefits under one mobile application allowing the employees to easily access their employee benefits. Epassi has over 13 million users. Sodexo is a French food services and facilities management company. Sodexo Benefits & Reward Services, recently rebranded as Pluxee, offers employee and health related services and benefits within the meal & food segment to help employers attract, retain, and motivate talents. With vast knowledge and insights of the value of employees’ wellbeing, Pluxee creates and develops innovative solutions for a sustainable and attractive workplace for small businesses as well as for listed and multinational companies.
Case published 11.8.2023