Atmos Energy Corp. launched a public offering of $600 million of its 4.300% senior notes due 2048.

The senior notes have a yield to maturity of 4.330%. Atmos expects net proceeds of about $591 million from the offering, after underwriting discounts and offering expenses.

The offering is scheduled to close on Oct. 4. J.P. Morgan Securities LLC, Mizuho Securities USA LLC, MUFG Securities Americas Inc. and TD Securities (USA) LLC are acting as representatives of the underwriters for the offering.

Atmos is a Dallas-based natural gas-only utility that serves more than 3 million customers in eight states.