Streszczenie
The main goal of this paper is to analyse the diversification of businesses activity of enterprises from the TSL sector. The main research hypothesis formulated in order to achieve the goal of the paper took the form of the following statement: the significant diversification of activities of the enterprises from the transport, forwarding and logistic sector is mainly outside the section „Transport and warehouse management”. The recognition of businesses activity extent of the analysed enterprises has been done with using of the basic descriptive statistics (i.e., the mean and median) and Friedman Test in SPSS. The results of conducted empirical research show that the highest number of groups PKD 2007 reported most frequently in 2010 and significantly different from the analysed variable for 2004 and 2005.