Shanghai GenTech (SHA:688596) said shareholder Fengfan Holdings, plans to sell up to 2.8 million shares, or 0.952% of total equity, to fund its own capital needs.
The reduction, via block trades or centralized bidding, will be conducted over three months starting July 30.
Fengfan holds 17.27% of the industrial gas company.
Shares of Shanghai GenTech closed 6% lower Thursday.