Taiwanese LED chip manufacturer Yang Hwa Technology owner Shih-Hsiung Chan was detained by police on Sept. 11, 2015 for suspected accounting fraud and market manipulation, according to a report by China Times.

Changfang Lighting announced on Aug. 15, 2014 that the company’s restructure application to absorb Kang Ming Sheng Industrial (KMSI) was halted by China Regulatory Commission over suspected insider trading by financial organization Guosen Consultant, according to several Chinese media reports.

Over the course of two years, three former high ranking officers from Chinese sapphire manufacturer Roshow Technology have been detained by Chinese authorities over insider trading, but the company has tried to downplay the incidents, according to a Chinese media China Times report. Some industry insiders also revealed company officers leaking sapphire investment info as a possible cause over the arrest.