WuXi AppTec (02359.HK) saw its stock price plummet by 5.27% in the pre-market session on Thursday, following the company's announcement of a significant share placement. The Chinese pharmaceutical and biotechnology company revealed plans to place 73.8 million new H shares at HK$104.27 per share under its general mandate.

The placement, which aims to raise capital for the company, has sparked concerns among investors about potential dilution of existing shareholdings. This move typically leads to a decrease in earnings per share and can put downward pressure on the stock price, as evidenced by the sharp decline in WuXi AppTec's shares.

While the company has not explicitly stated the purpose of the fundraising, such placements are often used to finance expansion plans, research and development, or to strengthen the company's balance sheet. Investors will be keenly watching for further details on how WuXi AppTec intends to use the proceeds from this share issuance and whether it will translate into long-term value for shareholders despite the immediate negative impact on the stock price.