Seres Group (SHA:601127) said the conversion period for controlling shareholder Chongqing Xiaokang's exchangeable bonds, 25 Kang 01EB, will start June 8 and run until Dec. 5.
The bonds are exchangeable for Seres Group A-shares, according to a weekend filing with the Shanghai bourse.
Xiaokang Holdings currently holds a 22.99% stake in Seres Group.
Shares of the automobile manufacturer fell 2% in recent trading.