This research is based on the hypothesis that although the knowledge management concept is not as popular as it was ten years ago, knowledge management itself is important for companies. It is necessary to distinguish terms “knowledge management concept” and “knowledge management” used in the paper. The paper is based on the results of quantitative research and qualitative research conducted in 2011 in Poland. Quantitative research was conducted in 142 companies from the list of 500 top companies in Poland. CATI surveying technique was used for the purposes of the research. The qualitative research was conducted in 6 companies, using the ethnographic methodology. Due to the content limitation, case studies for two companies are presented herein: DB Schenker from the logistics sector and Neapco from the manufacturing sector. These examples are interesting, because Schenker is the company paying great attention to knowledge management, while Neapco is the company characterised by effective team work and knowledge sharing as a part of the implementation of the quality management concept.