STO Express (SHE:002468) is terminating a planned convertible bond issuance and withdrawing application documents from the Shenzhen Stock Exchange, following a safety investigation into its wholly-owned subsidiary.
The subsidiary received a notice from industry authorities for alleged failure to properly fulfill unified security management responsibilities, according to a Wednesday filing with the Shenzhen bourse.
The investigation is ongoing.
Shares of the delivery services company slid 2% in recent trade.