We represent Nordic and international clients on all types 
of domestic and cross-border transactions


We are a cohesive team of transaction specialists intensely focused on making significant contributions to our clients’ success.


We work only on transactions within our core competencies, where our experience makes a difference.


We focus our practice on corporate transactions, private equity transactions, banking & finance and capital markets transactions

Corporate Transactions

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From the growth and mid-market sectors for Nordic private and public companies to large, complex transactions for multinational corporations.

We represent Nordic and international corporate clients on all types of domestic and cross-border M&A and corporate development transactions, including negotiated and contested transactions, share and asset purchases, tender and exchange offers, and joint ventures.

Our partners also provide advice to majority shareholders, boards of directors and senior management on a wide range of corporate development and governance matters.

We have represented many of the Nordic regions most successful corporations on their domestic as well as international transactions.

Our partners are particularly known for their experience on international to Nordic cross-border M&A transactions, where they have represented many of the world’s preeminent corporations.

Private Equity Transactions

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From venture and growth capital transactions to large cap buy-outs for Nordic and international multi-billion dollar private equity funds.

Our corporate M&A and leveraged finance attorneys team-up to form one deal execution team providing a comprehensive service, including structuring, negotiating and documenting our clients’ private equity transactions.

We represent many of the Nordic region’s leading and the world’s preeminent private equity sponsors in their respective segments. We follow our private equity clients through the entire investment cycle, all the way from planning and structuring the investment to the exit transaction, typically structured as a trade sale or IPO.

We represent private equity sponsors, banks, institutional lenders, debt funds and other investors in all stages of acquisition and leveraged finance transactions. Our acquisition and leveraged finance attorneys are experienced in all types of structures and documentation.

Banking & Finance

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From secured and unsecured credit facilities, bridge and mezzanine facilities, project finance facilities, bond offerings, securitisations and other structured financing transactions to distressed in and out-of-court restructurings and all types of distressed investments.

We advise Nordic corporate borrowers, the Nordic region’s leading banks and major international banks and financial institutions on secured and unsecured credit facilities, including asset-based facilities and second lien facilities, project finance facilities, bridge facilities, mezzanine facilities and bond offerings, including private placements and offerings for investment-grade issuers.

Our banking and finance attorneys have extensive experience representing clients in structured finance transactions. Our team’s experience includes securitisations of financial assets and mortgage loans, and sales of trade and other commercial receivables.

Our partners have represented many of the Nordics’ and the world’s leading banks, debt funds and other institutional lenders, as well as private equity sponsors and other investors, in several of the Nordic markets’ most complex distressed and insolvency-related financings and investments of the last decade. Taking advantage of our corporate M&A, private equity and leveraged finance experience, our attorneys team-up to form one restructuring and distressed investment team.

Our banking and finance attorneys are particularly known for their work on international financing transactions.

Capital Markets Transactions

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From listings and IPOs for first-time issuers and rights offerings of ordinary, preference and convertible shares to private placements and other exempt offerings of equity and debt securities.

We advise issuers and underwriters on financings spanning the spectrum of all types of capital markets transactions. We provide a comprehensive service for all phases of our clients’ capital markets transactions, including corporate structuring and governance, structuring of securities, prospectus preparation, regulatory and corporate law advice, and negotiation of underwriting agreements and other transaction documents.

We also provide issuers and other market participants with the most current advice on disclosure and corporate governance matters and corporate and securities regulatory matters.

Our partners also provide a full range of advice to domestic and international pension funds and alternative investment management clients, including regulated and non-regulated investment funds, hedge funds, private equity funds and other alternative investment vehicles. As part of our capital markets practice, our partners work closely with several domestic and internationally leading investment management clients on regulatory, advisory and transactional matters.


Recent representative transactions

Instalco IPO financing


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Proventus’ take-out financing of Express III

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Wint private placement


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General Atlantic and Merro Worldwide’s acquisition of Hemnet

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eEquity’s investments NA-KD and


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Sale of Outpost24


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Ratos’ sale of Mobile Cimate Control


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Refinancing of Autoliv facility


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Frasdale International’s sale of shares in D Carnegie Co AB (publ)

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Creades’ acquisition of Röhnisch Sportswear


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Proventus’ financing of KatExpress


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Ratos’ investment in Gudrun Sjödén


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Jan Byström focuses his practice on mergers & acquisitions and other corporate development transactions. His clients include Nordic and international private equity investors whom he advises on Nordic buy-out transactions, Nordic corporate clients whom he advises on Nordic and cross-border mergers & acquisitions, and United States’ corporate clients whom he advises on US-to-Nordic cross-border transactions. Prior to founding Baumgarten Byström Rooth & Partners, Jan Byström was a partner at Vinge and at Ashurst, both in Stockholm, and an associate with Davis Polk and Hunton and Williams, both in New York. Jan Byström began his career as an associate with Vinge in Stockholm. Mr. Byström is dually-qualified in Sweden and New York.


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IFLR1000 - Leading Lawyer




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Mathias Hansson focuses his practice on capital markets transactions, capital markets disclosure and regulatory matters. Mr. Hansson also provides investment funds advisory services.

Prior to joining Baumgarten Byström Rooth & Partners, Mathias Hansson was a partner at Wistrand and Ashurst, and an associate with Ashurst, Clyde & Co and Norton Rose in London. Mr. Hansson is dually-qualified in Sweden and England & Wales.


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IFLR1000 - Leading Lawyer





+46 (0)723 966 107

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Hannah Gröndahl advises on a range of general transaction and corporate advisory matters, including mergers & acquisitions, private equity sponsored transactions, restructuring and banking & finance.




+46 (0)723 966 112

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Jens Isakzon advises on a range of general transaction and corporate advisory matters, including mergers & acquisitions, private equity sponsored transactions, restructuring and banking & finance.




+46 (0)723 966 108

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Louise Sörelind advises on a range of general transaction and corporate advisory matters, including mergers & acquisitions, private equity sponsored transactions, restructuring and banking & finance.


We continue to grow and are looking for additional great lawyers to join our team.


Due to our firm’s structure and the engagement of our partners, we strongly believe that we can offer associates unparalleled opportunities for the development of their legal skills, business acumen and client relationship skills. As an associate, you will have the opportunity to, and you will be expected to, contribute actively to the development and success of a firm that aspires to be at the forefront of the Nordic M&A and private equity scene.


We are looking for highly-motivated, service-minded team players who aspire to work within corporate M&A, private equity, capital markets and banking and finance. In addition to strong social, analytical and legal skills, we look for dedication, drive, versatility and unpretentiousness. As the ideal candidate, you are ready to challenge yourself to think and act without regards to the usual hierarchies prevalent within full-service law firms. Experience matters, but character matters more.


If you are interested in joining us, the first step is to click here for an overview of our current requirements and what your application should include. The second step is to contact recruitment consultant Emma Syrén Julin (, tel. +46 767 98 13 64, of Harvey Nash Recruitment, to proceed with your application.

Awards & Rankings

Clients land our

“knowledge of the private equity sphere.”

Recommended for

“considerable experience handling matters on behalf of international investors”

Commentators note our

“expertise advising on English law-governed transactions.”

Commentators note our

“banking and restructuring capabilities.”

IFLR1000 (2016) Recommended Firm Rosette



Chambers Global 2016 Leading Firm


Jan Byström
+46 (0)723 966 103

Mathias Hansson
+46 (0)723 966 105

Blasieholmsgatan 5 | SE-111 48 Stockholm | | +46 8 52 52 6100