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.

News
& Insights
19.05.2025
GESSEL advised DataWalk on the issuance of Series S shares worth nearly PLN 60 milion
GESSEL advised DataWalk S.A., a provider of enterprise-class analytics solutions for the public safety and financial sectors, on the issuance of 750,000 Series S ordinar...
29.04.2025
GESSEL advised Olivia Fin on a bond issue approaching PLN 40 million
GESSEL provided legal advice to Olivia Fin sp. z o.o. S.K.A., a company from the group operating the Olivia Business Centre office complex in Gdańsk, in connection with ...
27.03.2025
GESSEL advised on the sale of shares in Vercom S.A. by Lithuanian shareholders in ABB transaction valued at nearly 300 million PLN
GESSEL provided legal advisory services to the Lithuanian shareholders, Ignas Rubežius, Ilma Nausedaite, and the company Ad Hoc Technologijos, UAB, in the sale of approx...
20.02.2025
GESSEL advised Creotech Instruments S.A. on its public offering of newly issued shares
The offering attracted significant interest from both institutional and individual investors. As a result, following the closing of the subscription, Creotech Instrument...
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)