Sten Olsson

+358 9 2288 4297
+358 50 499 0312
Elina Aulis

Assistant's telephone:

+358 9 2288 4311

Assistant's e-mail:


Sten heads Hannes Snellman's M&A practice in Helsinki and is a member of the firm's Partner Committee. He is recognised as one of the leaders in mergers and acquisitions, private equity transactions and fund formation work in Finland. Sten is a member of the Finnish Bar and he was admitted to the New York State Bar in 2001.


  • Leading individual, Commercial, corporate and M&A, Legal 500, 2019
  • "Clients describe him as an 'excellent M&A lawyer with vast experience and good commercial judgement.'" Corporate/M&A, Chambers Global 2019
  • "Sten Olsson is ‘a skilled negotiator’; ‘probably the best M&A lawyers in Finland’ according to one client", Commercial, corporate and M&A, Legal 500, 2018
  • "One client highlights that 'he makes clear and concrete recommendations which take commercial perspectives into account.'", Corporate and M&A, Chambers Global 2018 and Chambers Europe 2018
  • “Excellent senior lawyer with strong communication and technical skills and ability to develop trusting long-term relationships." IFLR1000 2018
  • Ranked as being among the world’s leading M&A and Governance lawyers, Who’s Who Legal: M&A and Governance 2019
  • Ranked as a Highly regarded lawyer in Capital Markets in the 2019 edition of IFLR1000
  • Winner of the Client Choice Awards for Mergers & Acquisitions Finland, 2017
  • "According to clients, Sten Olsson 'has very good negotiation skills and is good with people.'", Corporate and M&A, Chambers Global 2017 and Chambers Europe 2017
  • Ranked as a Leading Individual, Corporate and M&A, in the 2014 - 2018 editions of Legal 500
  • Ranked as a Leading Lawyer in Capital Markets in the 2014, 2015, 2016, 2017 and 2018 editions of IFLR1000
  • Ranked among the best lawyers in Mergers and Acquisitions, Private Equity and Investment Funds in the 2014, 2015, 2016 and 2017 editions of Best Lawyers®
  • "Sten Olsson is well regarded for his work in industrial and private equity-related M&A. Clients offer strong praise: 'He is one of the few lawyers in Finland who combines commercial, pragmatic judgement with legal knowledge,' and 'He is skilful and experienced – his negotiation skills are such that a solution or compromise will always be found.'", Chambers Global
  • “Sten delivers legal advice that is exceptional and aligned with the commercial targets of his client; he manages to get the deal done”, ILO Client Choice 2017
  • “He is an expert within his field; a true business partner”, ILO Client Choice 2017
  • “Sten is an effective communicator; he is always clear and responsive”, ILO Client Choice 2017
  • “Sten has a business-oriented approach; he offers practical advice that exceeds the standard level of service”, ILO Client Choice 2017
  • "Department head Sten Olsson regularly advises leading private equity houses... One client comments: 'If you need a lawyer to drive the deal forward, go to Sten. He is well connected with lots of experience and is very commercial' ", Corporate/M&A, Chambers Global and Chambers Europe
  • "Sten Olsson is noted as having 'a good balance between being thorough and being fast, with the ability to support us in making commercial judgements.' " Corporate and M&A, Chambers Global and Chambers Europe
  •  “Market leader Hannes Snellman has nine dedicated M&A partners led by Sten Olsson. Its illustrious client base includes domestic and foreign private equity sponsors, multinational corporations, and Nordic private and public companies.” Legal 500
  •  “There is unanimous consent among peers that the 'large and experienced' M&A team, led by Sten Olsson, ranks among the very best in Finland.”, IFLR
  • “practice head Sten Olsson is well respected”, Chambers Europe
  • ‘Sten Olsson..., who comes highly praised by peers...’, Chambers Global
  • “Sten Olsson led teams on many of the firm’s top deals”, IFLR
  • ‘...a wealth of experience that is arguably ‘better than the rest’, particularly in the form of Mikko Heinonen, Sten Olsson and Johan Aalto.’, IFLR


  • Hartwall Capital's acquisition of LeaseGreen

  • Counsel to Vaaka Partners in its acquisition of NHG

  • DevCo's acquisition of Medix Biochemica

  • Counsel to Vaaka Partners in its sale of Solita

  • Counsel to Terveystalo in its IPO and listing on the Nasdaq Helsinki stock exchange

  • Counsel to Vaaka Partners in its acquisition of Jungle Juice Bar

  • Counsel to Terveystalo in its acquisition of Diacor

  • Counsel to Hartwall Capital Oy Ab in its acquisition of SUEZ Suomi Oy

  • Counsel to DevCo in its acquisition of Vexve

  • Counsel to Triton in its acquisition of Fläkt Woods

  • Counsel to EQT in its acquisition of Touhula

  • Counsel to Intera in its acquisition of Wise Group

  • Counsel to Valmet plc in its EUR 340 million acquisition of the process automation business from Metso Corporation

  • Counsel to Trust Kapital in its acquisition of Enfo Zender

  • Counsel to Infratek in its acquisition of Pohjolan Werkonrakennus Oy

  • Counsel to Vaaka in its acquisition of Solita

  • Counsel to The Finnish State in the acquisition of Gazprom’s shares in Gasum

  • Counsel to Triton in its sale of Suomen Lähikauppa

  • Counsel to Humana AB in its acquisition of Arjessa Oy from Sentica Partners

  • Counsel to Vaaka in its sale of leading Nordic pet specialty retailer Musti ja Mirri Group

  • Counsel to Advent’s, Bain Capital’s and ATP’s in the acquisition of Nets

  • Counsel to Mondi Group in its contemplated acquisition of Walki’s extrusion coating plants in Finland and Poland

  • Counsel to EQT in its acquisition of Terveystalo from Bridgepoint
  • Counsel to Microsoft in its EUR 5.44 billion acquisition of Nokia's Devices and Services Business
  • Counsel to Advent in its acquisition of Mondo Minerals from HgCapital
  • Counsel to Triton in its acquisition of Suomen Lähikauppa from IK Invest
  • Counsel to Clayton, Dubilier & Rice, LLC in its acquisition of Ashland Water Technologies
  • Counsel to Vaaka Partners in the closing of its Buyout Fund II
  • Counsel to Ratos in its EUR 128 million sale of Medisize to Phillips Plastics Corporation
  • Counsel to Valedo in its acquisition of Corbel from Sentica
  • Counsel to UPM in its sale of its packaging business to Billerud
  • Counsel to Triton’s and KKR in the acquisition of Ambea / Mehiläinen
  • Counsel to UPM-Kymmene Corporation in its acquisition of Oy Metsä-Botnia Ab's Uruguayan operations and related transactions, with the aggregate value of approximately EUR 2 billion
  • Counsel to EQT in its EUR 195 million sale of VTI Technologies to Murata Manufacturing Co., Ltd


  • European Investment Fund, Luxembourg, 2004-2006
  • Debevoise & Plimpton, New York and London, 2001-2004
  • Mannheimer Swartling, Stockholm, 1999-2000
  • LLM, UC Berkeley and New York University, 2000 (Fulbright Scholarship)
  • Master of Laws, Helsinki University, 1999
  • Member of the New York Bar and Finnish Bar Association