Corporate restructuring has become one of the significant solution for firms to improve their financial performance, gain competitive advantage and industry dominance. This paper aims to examine the the impact of corporate restructuring on firm performance of the GCC firms using profitability, liquidity and leverage measures. The largest mergers and acquisition deals in GCC through 13 years from 2004 to 2017 were selected for this study. Ordinary Least Square Regression method with dummy variables was employed to examine the impact of corporate restructuring. The empirical results showed that profitability indicators return on assets and net profit margin revealed a negative impact of mergers and acquisitions (M&A) on the sample firms, but the results are not statistically significant. The regression outcomes evidenced that M&A deals had a positive but insignificant impact on the leverage position of the GCC firms. In case of firm liquidity, a significant negative effect was experienced in the post M&A periods. The outcomes of this study imply that there is no reason that always M&A deals bring synergic effect on the firm’s profitability. © 2019, Czestochowa University of Technology. All rights reserved.