LONDON — Graff officially set in motion its plans for a public listing on the Hong Kong stock exchange that could see the London-based diamond jewelry brand valued at $5 billion.

 

According to sources close to Graff, the company submitted an A1 form, or listing application form, together with supporting documents, in Hong Kong today. The listing is expected to take place in the second quarter.

 

A company spokesman declined to comment.

 

As reported, Graff is expecting to raise $1 billion on the Hong Kong exchange to help it expand in the Far East and to increase is inventories, as reported.