Many corporate acquirers impose losses on their shareholders. Conflicted or overconfident CEOs and boards embark on acquisitions that are not in the best interest of the owners of the firm. The governance tool of shareholder voting can represent a potential solution. This column shows that in the UK, where bids for relatively large targets require mandatory shareholder approval, shareholders gain when the transaction is conditional on a vote and lose when it is not. The evidence suggests that the vote puts a constraint on the amount the CEO can offer for the target.