Karolina Olszewska
Senior Associate
Competition and consumer law
Karolina specializes in antitrust law. She has been advising companies and other market players for over 10 years.

Languages:
BIO
Karolina’s professional focus is consumer protection law (including reviews of general terms and conditions and contract templates, proceedings before the Office of Competition and Consumer Protection concerning violation of collective consumer interests) and competition law (advice on merger notifications and securing antitrust clearance for concentrations, competition-inhibiting practices – especially abuse of dominant market position by enterprises).
Her experience has afforded her a thorough knowledge of real estate law. Karolina analyses the legal status of properties, advises on construction law aspects of residential developments and road infrastructure projects, and drafts documents in administrative litigation – also with regard to cases disputed in the context of what is known as the Warsaw Decree, a unique sub-category of Polish property law rooted in wholesale nationalisation of large tracts of land in the Polish capital in the aftermath of World War II.
Before joining GESSEL in 2019, she worked with Warsaw law firms and as an in-house lawyer at the Sports Institute – National Research Institute.

Experience
Competition law
- Advised companies belonging to the MS GALLEON capital group in numerous proceedings before the Office of Competition and Consumer Protection and the Serbian antitrust authority on securing clearance for concentrations involving companies in the energy sector, including nuclear energy
- Advised Polish Enterprise Funds SCA in Polish antitrust proceedings involving acquisition of control over Bisar SA and its subsidiaries
- Advised three investment funds in proceedings before the Office of Competition and Consumer Protection concerning clearance for take-over of the glass smelter Krosno S.A. and its subsidiaries
- Advises entities in proceedings before the Office of Competition and Consumer Protection concerning suspected abuse of dominant market position
- Advised companies belonging to the MS GALLEON capital group in numerous proceedings before the Office of Competition and Consumer Protection and the Serbian antitrust authority on securing clearance for concentrations involving companies in the energy sector, including nuclear energy
- Advised Polish Enterprise Funds SCA in Polish antitrust proceedings involving acquisition of control over Bisar SA and its subsidiaries
Consumer Protection law
- Reviews consumer relations documentation for compliance with consumer protection laws (for, among other clients, mBank and Aasa)
- Advises companies in proceedings before the Office of Competition and Consumer Protection in cases of violation of collective consumer interests
News
& Insights
28.06.2023
We advised the Avallon MBO fund in the process of preparing, negotiating and signing transaction documentation for the acquisition of a majority stake in SAT sp. z o.o.
We advised the Avallon MBO fund in the process of preparing, negotiating and signing transaction documentation for the acquisition of a majority stake in SAT sp. z o.o.,...
28.06.2023
We advised the Avallon MBO fund in the process of preparing, negotiating and signing the transaction documentation for the acquisition of a majority stake in SAT Ltd.
We advised the Avallon MBO fund in the process of preparing, negotiating and signing transaction documentation for the acquisition of a majority stake in SAT sp. z o.o.,...
31.05.2023
A business enterprise is misleading market participants? There’s a price to be paid
As lawyers point out, while Polish law does not regard greenwashing as a separate object of statutory concern, it is not as if enterprises can publicise misleading state...
12.04.2023
GESSEL advises VirtusLab Group on a landmark merger in the IT sector
GESSEL provided multidisciplinary legal support to VirtusLab in its takeover of SoftwareMill, a computer programme consultant. We are proud to have assisted our Client i...
Education and achievements

- Legal studies at the Faculty of Law and Administration of the University of Warsaw (2006)