Valter Olkkonen

Senior Associate, Member of the Finnish Bar

I assist our clients in various financing transactions.

Before joining Castrén & Snellman, I worked as a trainee at a major law firm in the United Kingdom and at a Big Four accounting firm in Finland.

In addition to my Master of Laws degree from the University of Helsinki, I have studied law at the University of Edinburgh.

Latest references

We advised S-Bank Plc in its issuance of a EUR 150 million Senior Non-Preferred Notes and on the tender offer of its EUR 150 million Senior Preferred MREL Eligible Notes maturing in 2026. The tender offer required prior approval from the Finnish Financial Stability Authority based on the Commission’s regulatory technical standards (EU) 2023/827. The Stability Authority granted S-Bank a permission for repurchases of the notes. Based on the permission, S-Bank replaced the notes with own funds or eligible liabilities instruments of equal or higher quality at terms that are sustainable for the income capacity of S-Bank. According to the final tender offer results published on 10 December 2025, S-Bank repurchased a total of EUR 97.9 million of the notes. The new notes will pay a floating interest rate, which is determined based on 3-month Euribor added with a margin of 1.35 per cent. The notes were issued on 11 December 2025 and listed on Nasdaq Helsinki Ltd. The maturity date of the notes is 11 December 2029. The purpose of the issue was to meet the minimum requirement for own funds and eligible liabilities (MREL) and to finance the bank’s activities.
Case published 18.12.2025
We advised Ålandsbanken Abp in the consent solicitation process regarding its SEK 150,000,000 Tier 2 notes due December 2041 and SEK 200,000,000 Tier 2 notes due March 2043. The terms and conditions of the aforementioned instruments were amended by removing the write-down mechanisms in the consent solicitation process. In addition, we advised Ålandsbanken Abp on the issue of SEK 350 million Additional Tier 1 notes. The notes bear floating interest at the rate of STIBOR three months plus a margin of 3.35 per cent per annum. The AT1 notes were issued on 20 November 2025, and admitted to trading on the official list of Nasdaq Helsinki Ltd. The instrument has no maturity date and qualifies as Additional Tier 1 capital in accordance with the EU Capital Requirements Regulation. The issue strengthens Ålandsbanken’s capital structure by taking advantage of favourable market conditions.
Case published 10.12.2025
We advised CapMan Real Estate in the acquisition and financing of a high-quality residential asset located in Katajanokka, Helsinki.  The asset was acquired from the Finnish Seamen’s Service Bureau (MEPA).  The property consisting of 38 modern rental apartments with a parking garage was completed in 2017. The building features high-quality construction, modern floorplans, and well-designed communal areas including a gym and rooftop sauna premises, and blends with the area’s historic maritime character. The residential asset is located in the prestigious Katajanokka seaside district of central Helsinki, known for its architectural heritage and proximity to the city centre. The property has a high ESG profile which will be further improved by CapMan Real Estate.
Case published 6.11.2025
We acted as legal advisor to OP Finland Infrastructure LP in connection with the conversion of the fund’s agreed EUR 50 million convertible bond into shares in Lounea Net Oyj in 2023. In connection with the conversion, the fund made a new additional investment of EUR 10 million in Lounea. As a result of the arrangement, OP Suomi Infra became a significant owner of Lounea Net Oyj with a 29% stake. Lounea is a Finnish optical fibre operator whose business consists of telecommunications infrastructure and ICT solutions. OP Finland Infrastructure is a fund investing in Finnish infrastructure. The fund is managed by OP Financial Group.
Case published 29.8.2025
We acted as the Finnish legal counsel for the funders to Nevel Oy in a EUR 665 million refinancing arrangement through a mix of multicurrency bank loans and private placement notes. Nevel is a utility infrastructure company offering advanced industrial and real estate infrastructure solutions that are fit-for-purpose and future-proof. The transaction supports Nevel’s growth strategy and its goal to help customers to achieve climate goals.
Case published 20.8.2025
We advised Triton Partners and Habeo Group in a leveraged financing arrangement with Danske Bank A/S, Nordea Bank Abp and Skandinaviska Enskilda Banken AB. The financing included facilities amounting to EUR 80 million for refinancing, acquisitions and other general corporate purposes. Habeo Group is a comprehensive service provider in the technical building services sector, cultivating the value of buildings throughout their lifecycle. The group employs some 600 technical building services professionals. In 2023, we advised Triton in its platform investment, the formation of Habeo Group, through its acquisition and financing of eight Finnish companies.  
Case published 7.8.2025
We advised The Mortgage Society of Finland in the update of a EUR 2,5 billion bond programme under which the Mortgage Society of Finland may issue senior preferred and unsecured Tier 2 notes, and covered bonds. The notes under the programme may be listed on the official list of Nasdaq Helsinki Ltd.  The Mortgage Society of Finland is the only nationwide credit institution in Finland that focuses on housing. It provides customers with the full range of home financing services such as granting mortgage and consumer loans for all stages of home owning including purchasing and renovating. The Mortgage Society of Finland carries out this activity in accordance with the Act on Credit Institutions and the Act on Mortgage Societies.
Case published 5.8.2025
We advised on the issuance of a EUR 10 million equity-classified convertible hybrid bond by Boreo Plc to the Norwegian insurance company Protector Forsikring ASA. The annual coupon interest on the bond is a fixed 4 percent until the reset date on 24 June 2030, after which the interest rate increases to 14 percent. The bondholders have the right to convert the principal amount into Boreo shares at a price of EUR 19 per share during a four-year period following the issuance. The bond is not intended to be admitted to trading on a stock exchange or any other trading venue. It has no specified maturity date, and Boreo has the right to redeem it for the first time after four years from the issuance date. ‘We are very pleased to have completed the transaction, and with the confidence Protector has shown in the company. The arrangement supports the execution of our acquisition-driven growth strategy, strengthens the company’s financial position, and lowers financing costs,’ says Kari Nerg, CEO of Boreo. OP Corporate Bank plc acts as the lead manager for the issuance of the convertible hybrid bond. Castrén & Snellman Attorneys Ltd serves as legal advisor to the transaction, and Legal Folks Ltd acts as Boreo’s legal advisor.
Case published 24.6.2025