The effects of corporate governance mechanisms on shared board membership profiles in Turkish business groups at subsidiary levels are examined to understand the management of business groups in this study. In this research, the effects of ownership concentration studied as corporate governance bodies and the structures of boards on the number of shared board memberships and their profiles are scrutinized by taking into consideration a bunch of control variables. In this regard, secondary data obtained from 53 subsidiaries belonging to 10 business groups in years of 2011 and 2014 are used, determined by judgmental sampling. As the results of analyses are evaluated as a whole, it is found out that the size of board of directors and the ratio of internal members affect shared board membership positively, whereas the ratio of female members influences it negatively. However, contrast to related literature, there is no the effect of the concentrated ownership on interlocking directoriates.