HealthyWay (HKG:2587) said its controlling shareholders have voluntarily extended their lock-up period by six months through Dec. 31, according to a Wednesday filing to the Hong Kong stock exchange.

Shares of the company were down about 9% in Thursday afternoon trading.

Chairman and CEO Zhang Wanneng and Affluent Base Limited, a company wholly owned by him, will refrain from disposing of or transferring any of their holdings, which amount to about 295.9 million shares, or 33.71% of the company's issued share capital.

HealthyWay said the voluntary extension was communicated directly by the shareholders.