The bond trading venue Tradeweb has taken a step towards a public listing of shares, just months after the chief executive of its parent group told Financial News such a move was being considered.

Refinitiv, the financial data provider that owns Tradeweb, has filed confidential paperwork for an initial public offering of the bond venue, according to a Bloomberg report citing people familiar with the matter. A listing could value Tradeweb at more than $4bn.