CHINA National Building Material Co, the nation's second-biggest cement firm, and the state pension fund are seeking as much as HK$2.34 billion (US$302 million) in a share sale, according to a document.

The firm is offering 272.7 million new shares at HK$7.45 to HK$7.85 each. The National Social Security Fund is selling another 25.8 million existing shares at the same price range.