Sonja Siggberg
Sonja Siggberg
Sonja's practice includes capital markets transactions and other transactions involving listed companies as well as corporate governance related matters. She has advised clients in a number of equity and debt capital market transactions (both domestic and international), including IPOs, secondary share issues, complex corporate transactions, public takeovers and bond issues. She is also a trusted advisor in disclosure, insider and corporate governance matters as well as other securities markets related regulatory matters.
She has a lot of experience and her work is of excellent quality.
Capital Markets | Chambers Global, 2023
References
Parties
NYAB AB, Dovre Group Plc
Transaction
NYAB AB's acquisition of Dovre Group Plc’s Norwegian consulting business and global project personnel business.
Deal Value
EUR 34 million
Role
Counsel to NYAB AB

Sonja Siggberg

Aki Salmela

Semmi Seljavaara

Johanna Haltia-Tapio

Annika Sillanpää
Parties
Sampo plc and Topdanmark A/S
Transaction
Sampo plc's recommended public exchange offer for the shares in Topdanmark A/S
Deal Value
DKK 33 billion
Role
Counsel to Sampo plc

Sonja Siggberg

Mikko Heinonen

Jon Termonen

Robert Gordin

Aki Salmela

Samuel Åkerlund

Tobias Palmgren

Sofi Lehtinen

Roope Sevón

Semmi Seljavaara

Heikki Vesikansa

Harri Vehviläinen

Isabella Kartila

Johanna Haltia-Tapio

Annika Sillanpää

Mikko Huimala

Anders Bygglin

Aleksiina Markkula

Jesper Nevalainen

Lasse Riski

Anni Ollus

Melisa Göllü

Anni Nohteri

Monika Parkkinen
Parties:
Kemppi Group Oy, Kempower Corporation
Transaction:
Counsel to Kemppi Group Oy, the majority owner of Kempower Corporation, in the placing of 3.4 million shares in Kempower Corporation
Deal value:
EUR 102 million
Role:
Counsel to Kemppi Group Oy

Sonja Siggberg

Mikko Heinonen

Tommi Kovero

Sofi Lehtinen

Tobias Palmgren
Hannes Snellman advises NYAB Plc on its re-domiciliation and transfer of listing from Finland to Sweden. The re-domiciliation to Sweden is planned to be executed as a cross-border conversion, pursuant to the so-called EU Mobility Directive, whereby NYAB Plc, without being dissolved or liquidated, would be converted from a Finnish to a Swedish public limited liability company with its registered office in Sweden.

Sonja Siggberg

Linnea Lehtonen

Heikki Vesikansa

Jenni Parviainen

Sofia Ropo
Parties:
Terveystalo Plc
Transaction:
Counsel to Terveystalo Plc, a healthcare service provider listed on Nasdaq Helsinki, in the issue and listing of senior unsecured sustainability-linked notes.
Value:
EUR 100 million
Role:
Counsel to Terveystalo Plc

Sonja Siggberg

Linnea Lehtonen

Annemari Rosi

Sofi Lehtinen

Markus Bremer

Pauliina Sutinen
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

Klaus Ilmonen

Sonja Siggberg

Aki Salmela

Jon Termonen

Viola Karjalainen

Roope Sevón

Wilma Montonen

Mikko Huimala

Päivi Tammilehto

Essi Ellman

Sofia Saarelainen

Annika Grönholm

Heikki Vesikansa

Jenni Parviainen

Harri Vehviläinen

Isabella Kartila

Johanna Haltia-Tapio

Melisa Göllü

Janika Manner

Monika Parkkinen

Anni Nohteri
Parties:
Sega Europe Limited and SEGA Corporation (Buyers) Rovio Entertainment Corporation (Target)
Transaction:
Counsel to Sega Europe Limited and SEGA Corporation in the recommended public cash tender offer for all shares and options in Rovio Entertainment Corporation.
Deal value:
Approximately EUR 706 million
Role:
Counsel to Sega Europe Limited and SEGA Corporation

Sonja Siggberg

Jon Termonen

Sofi Lehtinen

Claes Backström

Samuel Åkerlund

Satu Kokko

Viola Karjalainen

Heidi Haanpää

Mikko Huimala

Annika Grönholm

Panu Siitonen

Hilma Mäkitalo-Saarinen

Wilhelm Sanmark

Johanna Haltia-Tapio

Ingrid Remmelgas

Karoliina Kaartinen

Monika Parkkinen

Hanna-Mari Mudi
Parties:
Cargotec Corporation, Konecranes Plc
Transaction:
The announced, but subsequently abandoned, merger of Cargotec and Konecranes in 2021-2022
Deal value:
Approx. EUR 2.7 billion
Role:
Counsel to Konecranes Plc

Mikko Heinonen

Sonja Siggberg

Mikko Huimala

Markus Bremer

Jenni Heurlin

Johanna Haltia-Tapio

Ingrid Remmelgas

Matias Moberg

Riikka Kuha

Agda Vähä-Piikkiö

Linnea Lehtonen

Pauliina Sutinen

Jenni Parviainen

Heikki Vesikansa
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

Antti Nyberg

Sonja Siggberg

Klaus Ilmonen

Markus Bremer

Mikko Huimala

Jan Lilius

Mikko Tavast

Johanna Haltia-Tapio

Matias Moberg

Robert Gordin

Sofi Lehtinen
Parties
Viking Line Abp
Transaction
Counsel to Viking Line Abp on its EUR 51.8 million issue of new shares with pre-emptive rights for existing shareholders.
Deal Value
EUR 51.8 million
Role
Counsel to Viking Line Abp

Sonja Siggberg

Klaus Ilmonen

Markus Bremer

Hanna Lindberg

Stefan Stellato
Parties
Altia Plc, Arcus ASA
Transaction
Merger of Altia Plc and Arcus ASA to form Anora Group
Deal value
Preliminary aggregated annual revenue EUR 640 million
Role
Lead counsel to Altia Plc

Sonja Siggberg

Klaus Ilmonen

Anniina Järvinen

Robert Gordin

Mikko Huimala

Essi Ellman

Jenni Heurlin

Heikki Vesikansa

Harri Vehviläinen

Isabella Kartila

Markus Bremer

Johanna Haltia-Tapio

Panu Siitonen
Parties
Virala Acquisition Company Plc, Purmo Group Ltd
Transaction
Virala Acquisition Company Plc's merger with Purmo Group Ltd.
Deal Value
EUR 685 million
Role
Counsel to Virala Acquisition Company Plc

Sonja Siggberg

Anniina Järvinen

Linnea Lehtonen

Tommi Kovero

Tero Pikkarainen

Heikki Vesikansa

Stefan Stellato

Isabella Kartila

Antti Nyberg

Pauliina Sutinen

Axel Hård af Segerstad

Wilhelm Sanmark

Mikko Huimala

Jenni Heurlin
Parties
Virala Acquisition Company Plc
Transaction
Hannes Snellman acted as legal counsel to Virala Acquisition Company Plc on its IPO and the listing of its Class C shares on the SPAC segment of the regulated market of Nasdaq Helsinki
Deal Value
EUR 107.5 million
Role
Counsel to Virala Acquisition Company Plc

Sonja Siggberg

Anniina Järvinen

Sofi Lehtinen

Linnea Lehtonen

Tommi Kovero

Annemari Rosi

Aki Salmela

Heikki Vesikansa

Stefan Stellato

Isabella Kartila

Piia Ahonen

Marika Sorsa

Antti Nyberg

Johanna Haltia-Tapio
Parties
Vaaka Partners (Seller)
Transaction
Vaaka Partners' sale of their shares held in Musti Group Plc through an accelerated book-building process.
Deal Value
Value not public
Role
Counsel to Vaaka Partners

Sonja Siggberg

Anniina Järvinen
Parties
Ahlstrom-Munksjö Oyj (target), a consortium consisting of Ahlström Capital, Bain Capital Private Equity, Viknum and Belgrano Inversiones (buyer)
Transaction
Recommended public cash tender offer for all shares in Ahlstrom-Munksjö Oyj by Spa Holdings 3 Oy
Deal value
Approximately EUR 2.1 billion
Role
Counsel to the consortium

Sonja Siggberg

Antti Kuha

Annemari Rosi

Robert Gordin

Heikki Vesikansa

Stefan Stellato

Harri Vehviläinen

Antti Nyberg
Parties
Local Tapiola Finance Ltd
Transaction
Local Tapiola Finance Ltd's issue of EUR 115,000,000 2-year senior unsecured floating rate notes
Deal Value
Value not public
Role
Counsel to Local Tapiola Finance Ltd

Pauliina Sutinen

Sonja Siggberg

Annemari Rosi
Parties
Cramo Plc, Adapteo Plc
Transaction
Cramo’s partial demerger and listing of Adapteo on Nasdaq Stockholm
Deal Value
SEK 5.5 billion
Role
Counsel to Cramo Plc and Adapteo Plc

Sonja Siggberg

Antti Kuha

Elina Toivakainen

Linnea Lehtonen

Markus Bremer

Stefan Stellato
Parties
Ahlstrom-Munksjö
Transaction
Ahlstrom-Munksjö's EUR 150 million rights issue to partly finance the acquisition of Expera Specialty Solutions
Deal Value
EUR 150 million
Role
Counsel to Ahlstrom-Munksjö

Sonja Siggberg

Anniina Järvinen

Annemari Rosi

Elina Toivakainen
Parties
LocalTapiola Mutual Life Insurance Company
Transaction
LocalTapiola Mutual Life Insurance Company’s issue of EUR 100 million capital notes
Deal Value
Value 100 million
Role
Counsel to LocalTapiola Mutual Life Insurance Company

Markus Bremer

Sonja Siggberg

Annemari Rosi
Parties
Ahlstrom-Munksjö (Buyer), Expera Specialty Solutions (Target), KPS Capital Partners (Seller)
Transaction
Ahlstrom-Munksjö’s acquisition of Expera Specialty Solutions, a U.S.-based specialty paper producer
Deal Value
USD 615 million
Role
Counsel to Ahlstrom-Munksjö

Sonja Siggberg

Antti Kuha

Anniina Järvinen

Agda Vähä-Piikkiö
Parties
YIT Oyj
Transaction
Issue of EUR 100 million and EUR 150 million senior notes by YIT Oyj
Deal Value
EUR 250 million
Role
Counsel to YIT Oyj

Markus Bremer

Sonja Siggberg

Annemari Rosi
Parties
The State of Finland (seller), Altia Plc (target)
Transaction
Altia Plc’s IPO and listing on the official list of Nasdaq Helsinki
Deal Value
Over EUR 270 million
Role
Counsel to Altia Plc

Sonja Siggberg

Markus Bremer

Anniina Järvinen

Annemari Rosi

Matias Moberg
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

Sonja Siggberg

Anniina Järvinen

Antti Kuha

Ella Mäkijärvi

Elina Toivakainen

Markus Bremer

Matias Moberg

Annemari Rosi
Parties
Lemminkäinen Corporation and YIT Corporation
Transaction
The combination of Lemminkäinen Corporation and YIT Corporation through a statutory merger
Deal Value
EUR 771 million
Role
Counsel to Lemminkäinen

Sonja Siggberg

Mikko Heinonen

Markus Bremer

Heikki Vesikansa

Johanna Haltia-Tapio

Elina Toivakainen

Laura Tavakka

Heikki Majamaa

Harri Vehviläinen

Jenni Heurlin

Stefan Stellato
Parties
Ahlstrom Oyj, Munksjö Oyj
Transaction
The combination of Ahlstrom and Munksjö through a merger
Deal Value
Approx. EUR 1,2 billion
Role
Lead counsel to Ahlstrom

Sonja Siggberg

Antti Kuha

Heikki Vesikansa

Johanna Haltia-Tapio

Annemari Rosi

Stefan Stellato
Parties
Sampo plc (Buyer), Topdanmark A/S (Target)
Transaction
Sampo plc’s mandatory public cash offer for all outstanding shares in Topdanmark A/S
Deal Value
Value not public
Role
Counsel to Sampo plc

Sonja Siggberg
Parties
Acorda Therapeutics (Bidder), Biotie Therapies (Target)
Transaction
Acorda Therapeutics' public tender offer of the shares and other securities in Biotie Therapies
Deal Value
USD 363 million
Role
Counsel to Biotie Therapies Corp.

Mikko Heinonen

Klaus Ilmonen

Elina Toivakainen

Heikki Vesikansa

Anna-Maria Tamminen

Sonja Siggberg
Parties
Faron Pharmaceuticals Ltd
Transaction
Faron Pharmaceuticals Ltd's IPO and listing on the AIM market of the London Stock Exchange as well as the preceding fundraising of approx. GBP 10 million
Deal Value
Approx. GBP 10 million
Role
Counsel to Faron Pharmaceuticals Ltd

Sonja Siggberg

Heikki Vesikansa

Anniina Järvinen
Parties
Biotie Therapies Corp.
Transaction
Public offering and listing of Biotie Therapies Corp.’s shares on the NASDAQ Global Select Market New York
Deal Value
Approx. EUR 83 million
Role
Counsel to Biotie Therapies Corp.

Sonja Siggberg

Mikko Heinonen

Antti Kuha
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

Sonja Siggberg

Heikki Vesikansa

Anniina Järvinen
Rankings
- Recognised as Highly Regarded and ranked among Women Leaders in Capital Markets and M&A, IFLR1000, 2024
- "Sonja Siggberg is very responsive and has a holistic view of matters. She is one of the few generalists in the field who can take multiples aspects from different areas of law into account. The partner in charge is always on top of things and knows what the team is working.", Capital Markets, Legal 500, 2024
- "She has a lot of experience and her work is of excellent quality.", Capital Markets, Chambers Global 2023
- '"She is technically good," remark interviewees.', Capital Markets, Chambers Global 2022
- Ranked as a Highly regarded lawyer in Capital Markets and M&A in the 2021 edition of IFLR1000
- 'Sonja Siggberg "is very proactive, hands-on and always makes me feel like I receive very practical advice which allows me to move forward," says a client. She is well known for her ECM practice, being particularly active in listings.', Capital Markets, Chambers Global and Chambers Europe, 2021
- Ranked in Capital Markets in Chambers Europe 2020
- 'One client highlights her technical expertise in the capital markets area.', Chambers Europe, 2019
- 'Sources say that she is "a skilled capital markets lawyer," adding: "She is proactive and has a good, client-friendly approach."', Chambers Europe, 2018
- Ranked in Capital Markets in the 2017 edition of Legal 500
- Ranked as an "outstanding up and comer" in the 2017 edition (Finland: Capital Markets) of Chambers Europe
- Described as "a very dedicated and ambitious lawyer with a deep knowledge of company law." Sources also say that she is "a good listener.", Chambers Europe, 2017
- Ranked among the Rising stars in the 2017-2020 editions (Finland: M&A) of IFLR1000
Memberships and Positions of Trust
- Member of the Finnish Bar Association, 2005
Education and Professional Background
- Partner, Hannes Snellman, 2014–
- Managing Associate, Hannes Snellman, 2012–2013
- Senior Associate, Hannes Snellman, 2005–2011
- Visiting lawyer, Mannheimer Swartling, Berlin, 2003
- Associate, Hannes Snellman, 2001–2005
- Master of Laws, University of Helsinki, 2001