Shengyi Electronics' (SHA:688183) controlling shareholder, Shengyi Technology, saw its stake passively decline to 61.97% from 62.50% after bondholders converted 4.4 million shares of exchangeable bonds into stock.
The conversion occurred between Aug. 3 and Sept. 3, according to a weekend filing with the Shanghai bourse.
Shares of the printed circuit board maker jumped 10% in recent trade.