Horizon Robotics (HORIZONROBOT-W) saw its stock price plummet by 5.57% in the morning trading session on Friday, following the announcement of a significant share placement and top-up subscription. The Chinese autonomous driving solutions provider raised approximately $821 million through this Hong Kong-based transaction.

According to a term sheet, the company placed 639 million Class B ordinary shares at HK$9.99 per share, representing a 5.8% discount to the stock's last closing price on Thursday. This placement was conducted under a general mandate, with Goldman Sachs (Asia) L.L.C., Morgan Stanley Asia Limited, and UBS AG Hong Kong Branch acting as managers for the transaction.

The sharp decline in Horizon Robotics' stock price can be attributed to the dilutive effect of issuing new shares and the discount offered on the placement price. While the capital raise may strengthen the company's financial position and support its growth initiatives in the autonomous driving sector, the immediate market reaction reflects investors' concerns about share value dilution.