Sihuan Pharmaceutical Holdings Group (HKG:0460) will conduct a share repurchase worth up to HK$500 million through the open market, according to a Sunday filing.

The buyback will include the HK$5.4 million worth of shares already repurchased by the pharmaceutical company in the first half of the year, the filing said.

The company's stocks were up by 29% in recent trading.

Price (HKD): $0.92, Change: $+0.20, Percent Change: +27.78%