The World Tourism Organization (UNWTO) announced that tourist arrivals in the world fell by 74%, and in Europe by 71% in the crisis of 2020, due to the consequences caused by the COVID-19 pandemic. The efficiency and effectiveness of management decisions in the tourism sector were therefore of great importance for the hotel industry during the pandemic. The subject of this paper is the analysis of business performance and management decisions in the company Maistra d.d., whose parent company is Adris grupa d.d., before, during and after the COVID-19 pandemic. The tourism sector is the most important branch of the economy in the Republic of Croatia and accounts for 20% of GDP, making Croatia the leading country in the European Union with the highest share of the tourism sector in total GDP. This is evidenced by the decline in GDP in 2020 of 8.1%, as well as GDP growth of 10.4% in 2021 when the epidemiological situation was more favorable. For the analysis of the performance of Maistra d.d., secondary data sources were used, more precisely the audited annual financial statements obtained on the website of the Zagreb Stock Exchange and the official website of Maistra d.d., comparison and description methods were also used. Also, in this paper, in addition to the tourism industry, the insurance industry and the food industry are analyzed, which are present in the business of Adris grupa d.d., which is the parent company of Croatia osiguranje d.d. and Cromaris d.d.