
About
Provided by Hansberry Tomkiel
The Firm's clients are from the US, Europe and China. The industries in which the team provided representation in 2021 include: personal hygiene products; payment card organization; school book publication; department stores, automotive parts suppliers, away-from-home products; and a network of sport clubs.
Hansberry Tomkiel's offer includes advice and representation in the following areas of competition and consumer protection law:
- Agreements distorting competition (such as price-fixing, bid-rigging, etc.);
- Merger notification filings and representation before the Polish and European Competition Authorities;
- Abuse of dominance cases;
- Antitrust damage actions (private enforcement in civil courts);
- Investigatory proceedings by the Polish Competition Authority;
- Appellate litigation following decisions of the Polish Competition Authority;
- Unfair competition litigation before civil courts;
- Consumer protection, unfair advertising, use of misleading information;
- State aid; and
- Market supervision and product control.
Chambers Review
Focused on contentious matters, Hansberry Tomkiel is a competition law boutique that represents a variety of clients before the Polish competition authorities. The team assists with behavioural investigations and high-profile damages claims, as well as acting for clients in court on challenges to authority decisions. The practice also handles merger clearance matters. The law firm also provides compliance advice to Polish and multinational companies.
Work Highlights
- Hansberry Tomkiel represented Mastercard Europe in a damages claim regarding an alleged violation of competition law by Mastercard's interchange fees.
Strengths
Provided by Chambers
"The lawyers at Hansberry Tomkiel are all very client-oriented."
"The lawyers at Hansberry Tomkiel are very responsive and they always follow up."
"Hansberry Tomkiel is a forward-looking, proactive firm that anticipates issues and solves them quickly and efficiently."
"The lawyers at Hansberry Tomkiel are all very client-oriented."
"The lawyers at Hansberry Tomkiel are very responsive and they always follow up."
"Hansberry Tomkiel is a forward-looking, proactive firm that anticipates issues and solves them quickly and efficiently."
Notable Practitioners

Dorothy Hansberry-Bieguńska is a well-known name in the market, advising on a broad range of competition matters. She is known for assisting with contentious cases, particularly cartel investigations, appeals against decisions and follow-on damages claims. She also assists with merger clearance filings.
"She is a highly experienced lawyer and an expert in her field of practice."
"Dorothy Hansberry-Bieguńska is very experienced and strong."
"Dorothy Hansberry-Bieguńska is very responsive, highly competent and knows her way around in antitrust law."