Alliant Energy (LNT) said late Monday it priced a $500 million private placement of 3.25% convertible senior notes due May 30, 2028, for about $493 million in expected net proceeds.

Initial purchasers of the notes have an option to acquire up to an additional $75 million of the securities.

The company expects the offering to close Thursday and plans to use the net proceeds to repay or refinance debt, to reduce outstanding commercial paper or for general corporate purposes.