Delphi has registered for an initial public offering (IPO) of up to an estimated US$100m in stock.

The filing is a preliminary 'placeholder' and the company is hoping to raise more than US1bn from its IPO.

The proceeds of the offering will be used primarily to fund Delphi's operations, acquire capital equipment and repay debt.

Delphi emerged from bankruptcy in 2009 and the IPO plan comes as many suppliers in the US post higher profits amid concerted auto industry recovery.

Reports have suggested that the Delphi IPO could happen as soon as the third quarter of this year, two years after the company emerged from bankruptcy in the US.

"Assuming that the offering is priced at the midpoint of the range set forth on the cover of this prospectus, we expect the implied company value to exceed $6 billion," Delphi said in its filing with the US Securities and Exchange Commission.