Zayo Group Holdings Inc. unit Zayo Group LLC proposed a $500 million offering of its 5.750% senior notes due 2027 through an add-on to its existing issue.

The company said April 5 that it intends to use the net proceeds to repay about $500 million of its outstanding $1.35 billion tranche and $650 million tranche of term loans, each maturing Jan. 19, 2024, on a pro rata basis.