Fixed-income trading platform provider Tradeweb is in exclusive talks to buy BondDesk Group LLC in a deal that is expected to be valued up to $200 million, two sources familiar with the situation told Reuters this week.

Private equity firm Advent International Corp tapped Broadhaven Capital Partners LLC to sell BondDesk several weeks ago and Tradeweb, and rival fixed-income trading platform MarketAxess were among the bidders, sources have told Reuters.

A call to Broadhaven was not immediately returned. BondDesk and Tradeweb declined to comment.

(Reporting by Jessica Toonkel; Editing by Maureen Bavdek)