Tradeweb Markets Inc., an operator of electronic marketplaces, set the terms for its planned initial public offering on Monday, saying in a regulatory filing that it plans to offer 27.3 million shares priced at $24 to $26 each. The company would raise $682.50 at the midpoint of that range. The company has applied to list on Nasdaq, under the ticker symbol "TW." There are 12 underwriters on the deal, led by JPMorgan, Citigroup, Goldman Sachs and Morgan Stanley. Proceeds of the deal will be used to purchase certain interests from the company's bank shareholders.