People

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki

Klaus Ilmonen heads our Capital Markets practice in Helsinki. His practice includes equity capital markets and other corporate transactions involving public corporations. He has considerable experience from public takeovers, as well as from cross-border transactions. He also works with governance of public corporations.

Klaus has been appointed professor of practice at the Hanken School of Economics in Helsinki, and teaches corporate and securities law. He has also served on a consultative group for developing EU corporate finance regulation and has participated in drafting Finnish takeover regulation.

Klaus has qualified as an attorney in the State of New York, and practised U.S. securities law in the London office of the law firm Cleary, Gottlieb, Steen & Hamilton, where he represented European issuers and underwriters in international securities offerings. He also worked on international M&A transactions. 

He has been deployed with Finnish forces in Afghanistan, Kosovo and Lebanon, and serves as the managing director of the Mannerheim-Foundation in Finland. 

Klaus has been a visiting researcher at Harvard Law School, he holds a LL.M. degree from Columbia Law School in New York and a doctorate in law from the University of Helsinki.

Very well-respected, skilful and experienced capital markets lawyer.

Chambers Global 2022


References

Parties:

Prime Minister’s Office, Finnair Plc

Transaction:

Hannes Snellman acted as counsel to the Prime Minister’s Office in the rights offering of Finnair Plc, the Finnish airline with the State of Finland being the majority owner. Hannes Snellman advised, among other, on the share subscription made by the State of Finland by way of offsetting, in part, a capital loan provided by the State of Finland to Finnair, and related state-aid law matters. The rights offering of EUR 570 million is one of the largest rights offerings in Finland in recent years.

Deal value:

Approximately EUR 570 million

Role:

Counsel to Prime Minister’s Office

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Mikko Huimala

Mikko Huimala

Partner | Helsinki
mikko.huimala@hannessnellman.com
Riikka Rannikko

Riikka Rannikko

Managing Partner | Helsinki
riikka.rannikko@hannessnellman.com
Heikki Majamaa

Heikki Majamaa

Specialist Partner | Helsinki
heikki.majamaa@hannessnellman.com
Robert Gordin

Robert Gordin

Senior Associate | Helsinki
robert.gordin@hannessnellman.com
Päivi Tammilehto

Päivi Tammilehto

Counsel | Helsinki
paivi.tammilehto@hannessnellman.com
Jon Termonen

Jon Termonen

Managing Associate | Helsinki
jon.termonen@hannessnellman.com

Parties:

Uponor Corporation (target), Georg Fischer Ltd (buyer)

Transaction: 

Counsel to Uponor Corporation in the recommended public cash tender offer by Georg Fischer Ltd to purchase all of the issued and outstanding shares of Uponor Corporation. 

Value:

EUR 2.1 billion

Role:

Counsel to Uponor Corporation

Mikko Heinonen

Mikko Heinonen

Partner | Helsinki
mikko.heinonen@hannessnellman.com
Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Sonja Siggberg

Sonja Siggberg

Partner | Helsinki
sonja.siggberg@hannessnellman.com
Aki Salmela

Aki Salmela

Associate | Helsinki
aki.salmela@hannessnellman.com
Jon Termonen

Jon Termonen

Managing Associate | Helsinki
jon.termonen@hannessnellman.com
Viola Karjalainen

Viola Karjalainen

Associate | Helsinki
viola.karjalainen@hannessnellman.com
Roope Sevón

Roope Sevón

Associate | Helsinki
roope.sevon@hannessnellman.com
Wilma Montonen

Wilma Montonen

Associate | Helsinki
wilma.montonen@hannessnellman.com
Mikko Huimala

Mikko Huimala

Partner | Helsinki
mikko.huimala@hannessnellman.com
Päivi Tammilehto

Päivi Tammilehto

Counsel | Helsinki
paivi.tammilehto@hannessnellman.com
Helena Lamminen

Helena Lamminen

Senior Associate | Helsinki
helena.lamminen@hannessnellman.com
Essi Ellman

Essi Ellman

Associate | Helsinki
essi.ellman@hannessnellman.com
Sofia Saarelainen

Sofia Saarelainen

Associate | Helsinki
sofia.saarelainen@hannessnellman.com
 Annika  Grönholm

Annika Grönholm

Associate | Helsinki
annika.gronholm@hannessnellman.com
Heikki Vesikansa

Heikki Vesikansa

Partner | Helsinki
heikki.vesikansa@hannessnellman.com
Jenni Parviainen

Jenni Parviainen

Managing Associate | Helsinki
jenni.parviainen@hannessnellman.com
Isabella Kartila

Isabella Kartila

Senior Associate | Helsinki
isabella.kartila@hannessnellman.com
Melisa Göllü

Melisa Göllü

Legal Assistant | Helsinki
melisa.gollu@hannessnellman.com
Janika Vallila

Janika Vallila

Executive Assistant | Helsinki
janika.vallila@hannessnellman.com
Monika Parkkinen

Monika Parkkinen

Legal Assistant | Helsinki
monika.parkkinen@hannessnellman.com
Anni Nohteri

Anni Nohteri

Legal Assistant | Helsinki
anni.nohteri@hannessnellman.com

Parties

A consortium consisting of Security Trading, Fennogens Investments, Corbis, and Bain Capital (buyer), Caverion Oyj (Target)

Transaction 

Counsel to the offeror consortium consisting of Security Trading, Fennogens Investments, Corbis, and Bain Capital in the recommended public cash tender offer for all shares in Caverion Oyj.

Deal value 

EUR 955 million

Role 

Counsel to the offeror consortium consisting of Security Trading, Fennogens Investments, Corbis, and Bain Capital

Mikko Heinonen

Mikko Heinonen

Partner | Helsinki
mikko.heinonen@hannessnellman.com
Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Anniina Järvinen

Anniina Järvinen

Partner | Helsinki
anniina.jarvinen@hannessnellman.com
Marcus Lehtinen

Marcus Lehtinen

Senior Associate | Helsinki
marcus.lehtinen@hannessnellman.com
Aki Salmela

Aki Salmela

Associate | Helsinki
aki.salmela@hannessnellman.com
Tuire Kuronen

Tuire Kuronen

Partner | Helsinki
tuire.kuronen@hannessnellman.com
Riikka Kuha

Riikka Kuha

Senior Associate | Helsinki
riikka.kuha@hannessnellman.com
Heikki Vesikansa

Heikki Vesikansa

Partner | Helsinki
heikki.vesikansa@hannessnellman.com
Harri Vehviläinen

Harri Vehviläinen

Specialist Partner | Helsinki
harri.vehvilainen@hannessnellman.com
Ilmari Mäkimattila

Ilmari Mäkimattila

Associate | Helsinki
ilmari.makimattila@hannessnellman.com
Stefan Stellato

Stefan Stellato

Managing Associate | Helsinki
stefan.stellato@hannessnellman.com
Helena Lamminen

Helena Lamminen

Senior Associate | Helsinki
helena.lamminen@hannessnellman.com
Laura Sainio

Laura Sainio

Associate | Helsinki
laura.sainio@hannessnellman.com

Parties

The German State (Buyer), Fortum Oyj (Seller), Uniper SE (Target)

Transaction 

Fortum Oyj’s arrangements related to stabilisation of its German subsidiary Uniper SE. The package will ensure multi-billion funding for Uniper, sale of Fortum’s shareholding in Uniper to the German State for approximately EUR 0.5 billion as well as repayment of Fortum’s EUR 4 billion receivables from Uniper and release of EUR 4 billion parent company guarantees.

Deal value 

Approx. EUR 4.5 billion

Role 

Finnish counsel to Fortum Oyj

Mikko Heinonen

Mikko Heinonen

Partner | Helsinki
mikko.heinonen@hannessnellman.com
Antti Nyberg

Antti Nyberg

Partner | Helsinki
antti.nyberg@hannessnellman.com
Sonja Siggberg

Sonja Siggberg

Partner | Helsinki
sonja.siggberg@hannessnellman.com
Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Markus Bremer

Markus Bremer

Partner | Helsinki
markus.bremer@hannessnellman.com
Mikko Huimala

Mikko Huimala

Partner | Helsinki
mikko.huimala@hannessnellman.com
Jan Lilius

Jan Lilius

Specialist Partner | Helsinki
jan.lilius@hannessnellman.com
Mikko  Tavast

Mikko Tavast

Counsel | Helsinki
mikko.tavast@hannessnellman.com
Matias Moberg

Matias Moberg

Managing Associate | Helsinki
matias.moberg@hannessnellman.com
Robert Gordin

Robert Gordin

Senior Associate | Helsinki
robert.gordin@hannessnellman.com
Sofi Lehtinen

Sofi Lehtinen

Associate | Helsinki
sofi.lehtinen@hannessnellman.com

Parties

Basware Corporation (target), a consortium consisting of Accel-KKR, Long Path Partners, and Briarwood Chase Management (buyer)

Transaction

Counsel to the offeror consortium of Accel-KKR, Long Path Partners, and Briarwood Chase Management in the tender offer for all outstanding securities in Basware Corporation.

Deal Value

EUR 620 million

Role

Counsel to the consortium

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Tommi Kovero

Tommi Kovero

Senior Associate | Helsinki
tommi.kovero@hannessnellman.com
Aki Salmela

Aki Salmela

Associate | Helsinki
aki.salmela@hannessnellman.com
Robert Gordin

Robert Gordin

Senior Associate | Helsinki
robert.gordin@hannessnellman.com
Joonas Vartia

Joonas Vartia

Associate | Helsinki
joonas.vartia@hannessnellman.com
Linnea Lehtonen

Linnea Lehtonen

Senior Associate | Helsinki
linnea.lehtonen@hannessnellman.com
Roope Sevón

Roope Sevón

Associate | Helsinki
roope.sevon@hannessnellman.com
Heikki Vesikansa

Heikki Vesikansa

Partner | Helsinki
heikki.vesikansa@hannessnellman.com
Harri Vehviläinen

Harri Vehviläinen

Specialist Partner | Helsinki
harri.vehvilainen@hannessnellman.com
Sofia Ampuja

Sofia Ampuja

Senior Associate | Helsinki
sofia.ampuja@hannessnellman.com
Mikko Huimala

Mikko Huimala

Partner | Helsinki
mikko.huimala@hannessnellman.com
Markus Bremer

Markus Bremer

Partner | Helsinki
markus.bremer@hannessnellman.com
Pauliina Sutinen

Pauliina Sutinen

Senior Associate | Helsinki
pauliina.sutinen@hannessnellman.com
Johanna Haltia-Tapio

Johanna Haltia-Tapio

Specialist Partner | Helsinki
johanna.haltia-tapio@hannessnellman.com
Anna Nyberg

Anna Nyberg

Senior Associate | Helsinki
anna.nyberg@hannessnellman.com
Outi Jousi

Outi Jousi

Counsel | Helsinki
outi.jousi@hannessnellman.com
Annika Tiitola

Annika Tiitola

Associate | Helsinki
annika.tiitola@hannessnellman.com
Axel Hård af Segerstad

Axel Hård af Segerstad

Associate | Helsinki
axel.hard@hannessnellman.com

Parties

Citycon Oyj

Transaction

Citycon Oyj’s repurchase of a total amount of 9,500,000 own shares for a total purchase price of EUR 65.8 million as a result of a market based reverse accelerated bookbuild process

Deal Value

EUR 65.8 million

Role

Counsel to Citycon Oyj

Mikko Heinonen

Mikko Heinonen

Partner | Helsinki
mikko.heinonen@hannessnellman.com
Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Aki Salmela

Aki Salmela

Associate | Helsinki
aki.salmela@hannessnellman.com
Joonas Vartia

Joonas Vartia

Associate | Helsinki
joonas.vartia@hannessnellman.com

Parties

Valmet, Neles

Transaction

Hannes Snellman acted as lead counsel to Valmet, a leading global developer and supplier of process technologies, automation, and services for the pulp, paper, and energy industries, in its merger with Neles, one of the leading providers of mission-critical flow control solutions and services for process industries in Finland. 

Deal Value

The combined value of the merging companies is approximately EUR 7 billion.

Role

Lead counsel to Valmet

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Jon Termonen

Jon Termonen

Managing Associate | Helsinki
jon.termonen@hannessnellman.com
Annemari Rosi

Annemari Rosi

Senior Associate | Helsinki
annemari.rosi@hannessnellman.com
Aki Salmela

Aki Salmela

Associate | Helsinki
aki.salmela@hannessnellman.com
Sofi Lehtinen

Sofi Lehtinen

Associate | Helsinki
sofi.lehtinen@hannessnellman.com
Satu Kokko

Satu Kokko

Senior Associate | Helsinki
satu.kokko@hannessnellman.com
Mikko Huimala

Mikko Huimala

Partner | Helsinki
mikko.huimala@hannessnellman.com
Antti Nyberg

Antti Nyberg

Partner | Helsinki
antti.nyberg@hannessnellman.com
Pauliina Sutinen

Pauliina Sutinen

Senior Associate | Helsinki
pauliina.sutinen@hannessnellman.com
Heikki Vesikansa

Heikki Vesikansa

Partner | Helsinki
heikki.vesikansa@hannessnellman.com
Jenni Parviainen

Jenni Parviainen

Managing Associate | Helsinki
jenni.parviainen@hannessnellman.com
Harri Vehviläinen

Harri Vehviläinen

Specialist Partner | Helsinki
harri.vehvilainen@hannessnellman.com

Parties 

Terveystalo Plc, Terveystalo Healthcare Oy, Feelgood Svenska AB (publ)

Transaction 

Hannes Snellman advised Terveystalo on its acquisition of 72 percent of the shares and recommended mandatory takeover offer for Feelgood Svenska AB (publ)

Deal Value 

SEK 606 million / EUR 60 million

Role

Counsel Terveystalo Plc and Terveystalo Healthcare Oy

Marcus Lehtinen

Marcus Lehtinen

Senior Associate | Helsinki
marcus.lehtinen@hannessnellman.com
Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Markus Bremer

Markus Bremer

Partner | Helsinki
markus.bremer@hannessnellman.com
Matias Moberg

Matias Moberg

Managing Associate | Helsinki
matias.moberg@hannessnellman.com

Parties

PPG Industries, Inc. (Bidder), Tikkurila Oyj (Target)

Transaction

Recommended public cash tender offer for all of the shares in Tikkurila by PPG Industries, Inc.

Deal Value

EUR 1.5 billion

Role

Counsel to Tikkurila Oyj

Mikko Heinonen

Mikko Heinonen

Partner | Helsinki
mikko.heinonen@hannessnellman.com
Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Anniina Järvinen

Anniina Järvinen

Partner | Helsinki
anniina.jarvinen@hannessnellman.com
Agda Vähä-Piikkiö

Agda Vähä-Piikkiö

Senior Associate | Helsinki
agda.vaha-piikkio@hannessnellman.com
Jenni Heurlin

Jenni Heurlin

Managing Associate | Helsinki
jenni.heurlin@hannessnellman.com
Laura Sainio

Laura Sainio

Associate | Helsinki
laura.sainio@hannessnellman.com
Johanna Haltia-Tapio

Johanna Haltia-Tapio

Specialist Partner | Helsinki
johanna.haltia-tapio@hannessnellman.com
Satu Kokko

Satu Kokko

Senior Associate | Helsinki
satu.kokko@hannessnellman.com

Comprehensive advice on the state aid law for the Prime Minister’s Office concerning the recapitalisation (rights offering) of the state-controlled airline Finnair Plc, including advise on the notification procedure before the European Commission. The rights offering of 500 MEUR is one of the largest rights offerings in Finland in recent years. The Commission’s decision in the case lead to amendments to the COVID-19 related State Aid Temporary Framework.

Mikko Huimala

Mikko Huimala

Partner | Helsinki
mikko.huimala@hannessnellman.com
Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Jenni Heurlin

Jenni Heurlin

Managing Associate | Helsinki
jenni.heurlin@hannessnellman.com
Antti Kuha

Antti Kuha

Partner | Helsinki
antti.kuha@hannessnellman.com
Tommi Kovero

Tommi Kovero

Senior Associate | Helsinki
tommi.kovero@hannessnellman.com
Satu Kokko

Satu Kokko

Senior Associate | Helsinki
satu.kokko@hannessnellman.com

Parties

Verkkokauppa.com Oyj

Transaction 

Verkkokauppa.com Oyj's listing on the official list of Nasdaq Helsinki on 5 June 2020

Deal Value 

Value not public

Role

Counsel to Verkkokauppa.com Oyj

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Anniina Järvinen

Anniina Järvinen

Partner | Helsinki
anniina.jarvinen@hannessnellman.com
Elina Toivakainen

Elina Toivakainen

Counsel | Helsinki
elina.toivakainen@hannessnellman.com
Robert Gordin

Robert Gordin

Senior Associate | Helsinki
robert.gordin@hannessnellman.com
Tommi Kovero

Tommi Kovero

Senior Associate | Helsinki
tommi.kovero@hannessnellman.com

Parties

Tieto Corporation, EVRY ASA

Transaction

The combination of Tieto and EVRY through a cross-border merger

Deal Value

Value not public

Role

Counsel to EVRY ASA

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Riikka Kuha

Riikka Kuha

Senior Associate | Helsinki
riikka.kuha@hannessnellman.com
Stefan Stellato

Stefan Stellato

Managing Associate | Helsinki
stefan.stellato@hannessnellman.com

Parties

Outotec Oyj, Metso Corporation

Transaction

The combination of Outotec and Metso Minerals through a demerger

Deal Value

EUR 3.9 billion (illustrative combined sales)

Role

Counsel to Outotec Oyj

Mikko Heinonen

Mikko Heinonen

Partner | Helsinki
mikko.heinonen@hannessnellman.com
Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Markus Bremer

Markus Bremer

Partner | Helsinki
markus.bremer@hannessnellman.com
Anna-Maria Tamminen

Anna-Maria Tamminen

Partner | Helsinki
anna-maria.tamminen@hannessnellman.com
Heikki Vesikansa

Heikki Vesikansa

Partner | Helsinki
heikki.vesikansa@hannessnellman.com
Johanna Haltia-Tapio

Johanna Haltia-Tapio

Specialist Partner | Helsinki
johanna.haltia-tapio@hannessnellman.com
Elina Toivakainen

Elina Toivakainen

Counsel | Helsinki
elina.toivakainen@hannessnellman.com
Jenni Parviainen

Jenni Parviainen

Managing Associate | Helsinki
jenni.parviainen@hannessnellman.com
Annemari Rosi

Annemari Rosi

Senior Associate | Helsinki
annemari.rosi@hannessnellman.com
Emmi Kantola

Emmi Kantola

Senior Associate | Helsinki
emmi.kantola@hannessnellman.com
Stefan Stellato

Stefan Stellato

Managing Associate | Helsinki
stefan.stellato@hannessnellman.com
Maria Landtman

Maria Landtman

Partner | Helsinki
maria.landtman@hannessnellman.com

Parties

Glaston Corporation

Transaction

Rights issue in Glaston Corporation

Deal Value

EUR 34 million

Role

Counsel to Glaston Corporation

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Anniina Järvinen

Anniina Järvinen

Partner | Helsinki
anniina.jarvinen@hannessnellman.com
Annemari Rosi

Annemari Rosi

Senior Associate | Helsinki
annemari.rosi@hannessnellman.com
Ida Viitamäki

Ida Viitamäki

Counsel | Helsinki
ida.viitamaki@hannessnellman.com
Emmi Kantola

Emmi Kantola

Senior Associate | Helsinki
emmi.kantola@hannessnellman.com

Parties

Asiakastieto Group Plc (Buyer), UC AB (Target), Six Swedish banks (Sellers)

Transaction

Asiakastieto Group Plc’s pending acquisition of UC AB, a credit information company

Deal Value

Appr. EUR 340 million

Role

Counsel to Asiakastieto Group Plc

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Markus Bremer

Markus Bremer

Partner | Helsinki
markus.bremer@hannessnellman.com
Antti Kuha

Antti Kuha

Partner | Helsinki
antti.kuha@hannessnellman.com
Elina Toivakainen

Elina Toivakainen

Counsel | Helsinki
elina.toivakainen@hannessnellman.com
Annemari Rosi

Annemari Rosi

Senior Associate | Helsinki
annemari.rosi@hannessnellman.com

Parties

Suomen Terveystalo Oy

Transaction

Terveystalo’s IPO and listing on the Nasdaq Helsinki stock exchange

Deal Value

The offering by the company and its shareholders was over EUR 870 million and the Company’s market value was over EUR 1.2 billion

Role

Counsel to Terveystalo

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Sonja Siggberg

Sonja Siggberg

Partner | Helsinki
sonja.siggberg@hannessnellman.com
Anniina Järvinen

Anniina Järvinen

Partner | Helsinki
anniina.jarvinen@hannessnellman.com
Antti Kuha

Antti Kuha

Partner | Helsinki
antti.kuha@hannessnellman.com
Ella Hiltunen

Ella Hiltunen

Senior Associate | Helsinki
ella.hiltunen@hannessnellman.com
Elina Toivakainen

Elina Toivakainen

Counsel | Helsinki
elina.toivakainen@hannessnellman.com
Markus Bremer

Markus Bremer

Partner | Helsinki
markus.bremer@hannessnellman.com
Matias Moberg

Matias Moberg

Managing Associate | Helsinki
matias.moberg@hannessnellman.com
Annemari Rosi

Annemari Rosi

Senior Associate | Helsinki
annemari.rosi@hannessnellman.com

Parties

Asiakastieto Group Plc

Transaction

Asiakastieto Group Plc’s IPO and listing on the Helsinki Stock Exchange

Deal Value

Approx. EUR 170 million

Role

Counsel to Asiakastieto Group Plc

Klaus Ilmonen

Klaus Ilmonen

Partner, Doctor of Laws | Helsinki
klaus.ilmonen@hannessnellman.com
Sonja Siggberg

Sonja Siggberg

Partner | Helsinki
sonja.siggberg@hannessnellman.com
Heikki Vesikansa

Heikki Vesikansa

Partner | Helsinki
heikki.vesikansa@hannessnellman.com
Anniina Järvinen

Anniina Järvinen

Partner | Helsinki
anniina.jarvinen@hannessnellman.com

Rankings

  • Ranked in Capital Markets, Chambers Europe, 2024
  • Ranked in Capital Markets, Chambers Global, 2024
  • 'Klaus Ilmonen is described as a "very well-respected, skilful and experienced capital markets lawyer."', Capital Markets, Chambers Global 2022
  • "Klaus Ilmonen is the brilliant head of the practice", Capital Markets, Legal 500, 2020
  • Leading individual, Capital Markets, Legal 500, 2020-2022
  • "Clients say he has an 'encyclopedic knowledge of the issues and is very collaborative when working with the other side.'", Chambers Europe 2020
  • "Impeccable legal knowledge and commercial understanding.", IFLR1000, 2020
  • Ranked as a Market leader in Capital Markets in the 2019-2021 editions of IFLR1000
  • "Sources say that Klaus Ilmonen is 'responsive, pragmatic and easy to work with. He is also extremely experienced and knowledgeable so he really ticks all the boxes.' One interviewee enthuses: 'Klaus is a clear professional in all aspects: technical knowledge, commercial awareness, effectiveness and client service.'", Chambers Europe 2018
  • Ranked among the best lawyers in Capital Markets in the 2015-2021 editions of Chambers Europe
  • "Klaus Ilmonen is ‘one of the few experienced lawyers in the Finnish IPO market’ ", Capital Markets, Legal 500, 2015
  • Ranked among the best lawyers in the 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 and 2017 editions (Helsinki: Capital Markets, Mergers and Acquisitions) of Best Lawyers®

Memberships and Positions of Trust

  • Professor of Practice, Hanken School of Economics
  • Member of the expert group on securities regulation of the Finnish Bar Association
  • Managing director of the Mannerheim Foundation

Education and Professional Background

  • Doctor of Laws, University of Helsinki, 2016
  • Harvard Law School, Visiting Researcher, 2011 - 2012 (Jan.)
  • Partner, Hannes Snellman, 2007
  • Associate, Cleary, Gottlieb, Steen & Hamilton, London, 1999 - 2002
  • LL.M. (Stone Scholar), Columbia University, 1999