The purpose of this research is to study the modern specificity of intra-firm communications of industrial enterprises. On the basis of a comprehensive analysis of approaches of various sciences to the phenomenon of intra-firm communications, the following conclusions were formulated in the paper. It has been established that intra-company communications at various levels (vertical links with management and subordinates, symmetrical and supportive communications with colleagues) significantly affect the psychological well-being of employees in conditions of high turbulence of the external environment. It is shown that trust in the organisation mediates the impact on employees' psychological well-being. This study deepens the understanding of psychological well-being of employees in industrial enterprises by examining the impact of internal communication on financial and economic performance. The results of the study can become the basis for practical recommendations on how to promote the psychological well-being of employees by creating an effective intra-company communication environment, both at the level of the whole organisation and at the level of colleagues by increasing the trustworthiness of relationships.