The 2014 passage of the Florange Act in France changed an opt-in provision for loyalty shares (allocating a second voting right for shares held at least two years) to an opt-out provision with shareholder approval. We find that before 2014, loyalty shares were popular among small family firms. Following the Act, firms with a one share – one vote structure that announced they would opt out of the law incurred a negative market reaction, suggesting that shareholders have a positive perception of loyalty shares. It appears that by encouraging costly monitoring by long-term shareholders, loyalty shares can benefit all shareholders.