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Mateusz Zaleński focuses his practice on securities law, mergers and acquisitions and capital market transactions. He has advised on primary and secondary public offerings, issues of debt securities and public-to-private transactions. He has worked for investment banks, multinational corporations, as well as private equity and venture capital funds.


  • Capital markets
  • Mergers and acquisitions



  • Represented PKO BP, mBank and Wood & Co. in the initial public offering of Shoper S.A. shares.˚
  • Represented Discovery Communications and Liberty Global in connection with the IPO of Canal + Polska (transaction suspended twice).˚
  • Advised Goldman Sachs International, through its affiliate Bricks Acquisition Limited, on a PLN 1 billion tender offer for 100% of shares in ROBYG S.A.˚
  • Advised Pfleiderer and Atlantik S.A. in connection with the re-IPO of the merged Plfeiderer Group on the WSE. The value of the offering was PLN 362 million.˚
  • Advised Energa S.A. on the process of having PLN 1 billion Series A bonds admitted to trading on the Catalyst regulated market.˚
  • Advised Energa S.A. on the PLN 2.4 billion IPO on the WSE.˚
  • Advised BNP Paribas on the public offering of shares listed on the WSE. The value of the offer was PLN 231.2 million.˚
  • Advised the European Bank for Reconstruction and Development in connection with its participation in the IPO of PKP Cargo and the acquisition of 5.27% of PKP Cargo’s shares. The value of the transaction was PLN 155.4 million.˚
  • Advised the underwriters Deutsche Bank, Citigroup, Morgan Stanley, BofA Merrill Lynch, Credit Suisse, KBC Securities and Santander Investment in connection with one of the biggest secondary offerings in the history of the WSE – the PLN 4.9 billion secondary offering of BZ WBK shares.˚
  • Advised Barclays Capital, J.P. Morgan, Morgan Stanley and Ipopema S.A. – joint global coordinators and bookrunners on Alior Bank’s PLN 2.1 billion IPO.˚
  • Advised the Joint Global Coordinators Citigroup Global Markets Limited, DMBH, Société Générale, UBS and Deutsche Bank AG, London Branch, and the Joint Bookrunners DM PKO BP, DI BRE, DM BZ WBK and Wood&Co on the PLN 238.6 million IPO of Polski Holding Nieruchomosci (PHN).˚
  • Advised Zespól Elektrowni “Patnów-Adamów-Konin” S.A. on the USD 220 million IPO on the WSE.˚
  • Advised Silvair Inc. in connection with its initial public offering of shares and their admission to trading on the regulated market operated by the Warsaw Stock Exchange. It is the first IPO in history where the shares of an issuer from the U.S. were listed solely on the regulated market of the WSE.˚
  • Represented Value4Capital, a private equity firm, on the sale of 100% of the shares in Kom-Eko to a fund whose sole and exclusive investment advisor is CEE Equity Partners.
  • Represented PCF Group S.A. in the acquisition of a controlling stake in Incuvo S.A. from OÜ Blite Fund, and Estonian limited liability company. 
  • Advised Żabka Polska in connection with the acquisition of Dietly.°
  • Advised Resource Partners in connection with the acquisition of Atlantic Products.°
  • Advised PORR on the sale of shares in Stal-Service to Celsa.°
  • Advised Hyundai Engineering and Korea Overseas Infrastructure & Urban Development Corporation (KIND) on a project finance investment in the Polimery Police project implemented by Grupa Azoty.°
  • Advised Resource Partners in connection with the acquisition of Maced.°
  • Advised Resource Partners on the sale of Golpasz.°
  • Advised Viessmann in connection with the acquisition of Kospel.°
  • Advised the shareholders of Copernicus in connection with the sale of the company to Nemera.°
  • Advised Venture Fundusz Inwestycyjny Zamkniety, managed by TFI Trigon S.A., on its first Series A Investment in a Delaware corporation, Silvair Inc.°
  • Advised Pfleiderer Grajewo and Atlantik in connection with the cross-border reorganization of the Pfleiderer Group, which was based on a reverse takeover structure where Pfleiderer GmbH. was acquired by Pfleiderer Grajewo S.A. with the proceeds from the public offering of shares in Pfleiderer Grajewo S.A. The total value of the Transaction amounts to approximately PLN 744 million.°
  • Advised Cyfrowy Polsat S.A. in connection with all aspects of the acquisition of Polkomtel sp. z o.o. including (i) negotiating agreements with existing shareholders, (ii) issue of Cyfrowy Polsat’s new shares and their admission to the WSE, as well as (iii) refinancing of the existing indebtedness of Cyfrowy Polsat and Polkomtel capital group (Senior Notes, PIK Notes and Senior Facilities). The value of the transaction was PLN 6.15 billion.°
  • Advised BNP Paribas Group on the PLN 4.2 billion acquisition of the Polish Bank Gospodarki Zywnosciowej from the Rabobank Group.°
  • Advised Alior Bank in connection with the acquisition of 98% of shares in Meritum Bank from Innova Capital. The value of the transaction was PLN 352 million.°
  • Advised PKO BP Bank in connection with the acquisition of Nordea Bank Poland, Nordea Life and Nordea Finance. The value of the transaction was approx. PLN 3.5 billion.°
  • Advised BSH Bosch und Siemens Hausgeräte GmbH in connection with the acquisition of convertible bonds issued by Zelmer SA.°
  • Advised BSH Bosch und Siemens on a public tender announced to purchase 100% of Zelmer S.A. share capital, followed by a squeeze-out of minority shareholders and the delisting of Zelmer from the Warsaw Stock Exchange.°

°The above representations were handled by Mr. Zaleński prior to his joining GREENBERG TRAURIG Nowakowska-Zimoch Wysokiński sp.k.

Recognition & Leadership

  • Member, Warsaw Bar Association
  • Certified Advisor at ASO (Alternative Trading System)


  • LLM, Harvard Law School, 2019
  • Advocate, 2015
  • Master of Law, University of Warsaw, 2011
  • Bachelor’s Degree, Warsaw School of Economics, 2011
  • Poland
  • Polish, Native
  • English, Fluent
  • Spanish, Conversational