This paper examines the effects of employee stock ownership plans (ESOPs) on shareholder wealth. ESOPs established in the presence of takeover activity reduce share values, by approximately 4% on average. ESOPs also reduce share values if they are structured to transfer control away from outside shareholders, by creating a new ownership block with veto power over takeover bids. Large ESOPs established with nonvoting stock, so as to preclude any immediate control transfers, result in a significant increase in share values. The wealth effect of any given ESOP thus depends upon both its incentive and control effects on the corporation.