ITG began marketing its initial public offering of 19.5 million class A shares, targeting a price range of $19 to $22 per share, the company said Monday.

The company and a selling shareholder granted underwriters a 30-day option to purchase up to an additional 2.93 million shares, it said.

ITG said it plans to use the proceeds primarily to repay debt, with the remainder allocated to general corporate purposes.

The company plans to list its class A common stock on the Nasdaq under the ticker symbol "ITG."