The research empirically examines effect of Mergers and Acquisitions on Corporate Financial success of Quoted Insurance Companies in Nigeria. It has become expedient in the face of the drastic increase in Mergers and Acquisitions activity in recent decades and the fact that there has been very little empirical evidence of positive wealth effects and particularly the success of M&A in the insurance sector. This has arisen because most studies in Nigeria have rather focused on the banking sector. Data was obtained from Quoted Insurance Companies from 2003 to 2016 and the Regression Techniques were employed in the study. The result indicated that there exists a positive effect of M&A on Corporate Financial Performance of Insurance Companies. It revealed that a unit increase in merger led to about 4% increase in the Corporate Financial Performance of the merged firms. In effect, a unit increase in Earnings after Merger actually led to about 8% increase in the Corporate Financial Performance of the same firms. The study hereby recommend that Insurance Companies should look at issues of Claims settlement, Product Development and Branding while the National Insurance Commission (NAICOM) should look into the education of insurable clients as well as appropriate polices that would drive Insurance penetration in Nigeria.