This paper investigates the market response to reform of the Chinese split (A-)share structure using a sample of companies included in the China Securities Index 300. We find the three-day cumulative abnormal returns (CAR) to be negative and significant around government announcement of the reform on 29 April 2005, but not significant around individual companies’ decision to implement the reform. We attribute this change in market sentiment to the release of information during company announcement that the reform will feature some type of consideration to existing shareholders of tradable A-shares. Our results also show that existing holders of tradable A-shares require higher returns when companies pay in warrants or combination methods. However, we find no relation between the level of consideration and CAR suggesting that investors perceive the consideration to be adequate based on the company’s financial and operating conditions at the time of the reform.