Antonina Stępniewska
Associate
Capital MarketsShe deals with capital market and corporate law matters.
Languages:
BIO
Antonina participates in projects related to the acquisition of debt and equity financing in connection with the issuance of financial instruments in private and public transactions. She also participates in projects related to the admission and introduction of financial instruments to trading on a regulated market and in an alternative trading system.
She assists in the representation of clients before the National Depository for Securities (KDPW S.A.) and the Warsaw Stock Exchange (Giełda Papierów Wartościowych w Warszawie S.A.). He participates in due diligence processes for capital transactions. She also provides ongoing services to public companies in the field of corporate law and compliance with disclosure obligations.
Prior to joining Gessel in 2023, she gained experience in Polish law firms and companies, where she dealt with issues in the field of day-to-day corporate services for commercial law companies.
During her studies, she actively participated in the activities of the Academic Circle of Capital Markets Law, of which she was president in the academic year 2021/2022. As part of it, she co-organised nationwide projects such as Rynkologia, Corporate Law Academy or the Capital Markets Law Tournament, as well as the Private Equity Academy in cooperation with the SGH Investor Club. During her studies, she provided free legal assistance within the Law Clinic at the University of Warsaw in the civil law section.
Experience
Selected projects
- Advised Cognor Holding on a PLN 300 million secondary public offering conducted through an accelerated bookbuilding (ABB) process, comprising the sale of existing shares by PS Holdco and newly issued shares
- Advised Bioceltix on two equity offerings with a total value of PLN 116 million, comprising a shareholder-led secondary public offering conducted through an accelerated bookbuilding (ABB) process and the issuance of two tranches of new shares funded with proceeds from the ABB
- Advised cyber_Folks on a non-prospectus public offering of series E shares issued through an accelerated book-building process (ABB) with a value of the offering exceeding PLN 200 million.
News
& Insights
24.02.2026
GESSEL advises DataWalk on PLN 116.25 million public offering of newly issued shares
GESSEL advised DataWalk S.A., the Warsaw Stock Exchange-listed technology company developing a graph analytics platform used in the public and financial sectors, on a PL...
03.12.2025
GESSEL advised Cognor Holding on a public share offering valued at PLN 300 million
GESSEL advised Cognor Holding S.A. (the “Company”), one of the largest steel product manufacturers in Poland, on a secondary public offering of new shares with a value o...
23.10.2025
GESSEL advised on two public offerings of Bioceltix shares with a total value of over PLN 116 million
GESSEL provided comprehensive legal advice to Bioceltix S.A. (the “Company”), a Wrocław-based biotech company, in connection with a public offering of shares conducted t...
17.09.2025
GESSEL advised on a non-prospectus public offering by cyber_Folks worth over PLN 200 million
GESSEL successfully advised cyber_Folks S.A., a dynamically growing technology group, on the public offering of 1,134,400 series E shares issued through an accelerated b...
Education and achievements
- Studying law at the Faculty of Law and Administration at the University of Warsaw (2023)
- Bachelor’s degree in Global Business, Finance and Management at the Warsaw School of Economics (2022)
- Legal studies at Università degli Studi di Parma as part of the Erasmus+ programme (2022-2023)
- Master’s degree in Finance and Accounting at the Warsaw School of Economics (from 2023)