The major subject of the theoretical-empirical study presented in this paper is the analysis of relation
between changes in share capital book value and market value and efficiency of selected public construction companies listed on the Warsaw Stock Exchange. The examined research problem is discussed in three parts. The first part includes the evaluation of influence the process share capital increase on strategic finance management of companies. The second part comprises the results of empirical research on changes in share capital in public construction companies listed on the Warsaw Stock Exchange in the period between 2003–2012. The third part depicts the results of study on strength and character of dependence between share capital shaping and the following ratios: return on total assets, return on equity, market capitalization and price to book value (P/BV).