Inner Mongolia Berun Chemical (SHE:000683) actual controller Dai Lianrong increased his stake by 500,000 shares, according to a Thursday filing with the Shenzhen bourse.
Dai held more than 3 million shares prior to the stake increase, the chemical company said in its filing.
Following the stake increase, Dai now holds more than 3.5 million shares.
The actual controller also holds 26.8928% in Berun's controlling shareholder, Boyuan Group.
Shares rose 2% during afternoon trading on Thursday.