Concho Resources Inc. closed on July 2 its public offering of senior notes totaling $1.6 billion, the proceeds of which would be used to fund its pending $9.5 billion acquisition of RSP Permian Inc.

The offering was composed of $1 billion of 4.3% senior notes due 2028 and $600 million of 4.85% senior notes due 2048. The 2028 notes are due to mature on Aug. 15, 2028, while the maturity date for the 2048 notes is Aug. 15, 2048.

Bank of America Merrill Lynch, J.P. Morgan and Wells Fargo Securities acted as joint book running managers for the offering.