India, July 5 -- SK Hynix is considering paying investment banks a base underwriting fee of about 0.5% of the proceeds from its planned U.S. listing, which could become one of the largest share sales in history, according to people familiar with the matter.

The South Korean memory chipmaker has indicated it may issue up to 2.5% of its outstanding shares, though the final size of the offering-and the total fees-has yet to be determined. The sources said the company is also considering discretionary incentive payments on top of the base fee, with discussions still ongoing.

Based on SK Hynix's current market capitalisation of about $1.1 trillion, the offering could raise roughly $26.5 billion, resulting in underwriting fees of more than $1...