Mateusz Kosiorowski
adwokatMateusz Kosiorowski heads the Insurance practice. He advises clients—including financial institutions—on insurance matters and compensation claims. He has extensive experience in insurance disputes and in loss-adjustment and recourse proceedings, particularly under property insurance.
He handles insurance contracts, regulatory matters (including soft law) affecting participants in the insurance sector, and insurance distribution issues. He specialises in corporate insurance products, including such coverage as directors and officers (D&O), construction all risks and erection all risks (CAR/EAR), professional indemnity (PI), property damage and business interruption (PD&BI), warranty and indemnity (W&I), cyber insurance, and trade credit insurance.
He represents clients in judicial and administrative proceedings and before the administrative courts. He has experience pursuing extraordinary avenues of appeal.
He has experience unmatched on the Polish market in insurance for spacecraft (including launch-phase insurance) and insurance related to nuclear energy risks.
Faculty of Law and Administration, University of Szczecin
SGH Warsaw School of Economics—postgraduate studies in insurance (absolutorium)
Finalist in the 4th Constitutional Tournament organized by the Prof. Zbigniew Hołda Association
Affiliated with the Honorary Consulate of the Kingdom of Norway in Szczecin, 2013–2016.
Worked at a law office in 2016–2019 advising and representing insurance companies.
Warsaw Bar Chamber
“Selected aspects of CAR/EAR insurance” (co-author), 2026 Yearbook
“A few words about D&O insurance on the Polish market” (co-author), 2025 Yearbook
“Railway accidents: Is the infrastructure manager also liable?” (co-author), 2024 Yearbook
“Damages for costs of care provided free of charge by family members to an injured party who has suffered bodily injury or a health disorder Comment on the resolution of a seven-judge panel of the Supreme Court of Poland of 22 July 2020, case no. III CZP 31/19,” Co do zasady. Studia i analizy prawne, 2022 no. 1
“Can epidemic claims be pursued in a class action?” 2021 Yearbook (co-author)
“Assignment of claims under mandatory motor vehicle civil liability insurance for reimbursement of the cost of preparing a private appraisal: Comment on the resolution of a seven-judge panel of the Supreme Court of Poland of 2 September 2019 (case no. III CZP 99/18),” Co do zasady. Studia i analizy prawne, 2020 no. 2
“Selected schemes for international distribution fraud and standing to seek damages for economic loss under the CMR Convention,” Co do zasady. Studia i analizy prawne, 2020 no. 1
The Legal 500 EMEA 2025, Insurance