Chesapeake Energy Corp. (NYSE: CHK) closed an offer of $3 billion, in aggregate principal amount, of senior notes, the company said April 24, noting that the offer was conditional in the buyback of any 9.5% notes due 2015 in a cash tender offer.

All 9.5% notes were validly tendered on April 23, the company added, noting that the tender offer was made pursuant to an April 10 purchase offer.

The tender offer is scheduled to end on May 7, the company said.

Morgan Stanley & Co. LLC and Citigroup Global Markets Inc. were dealer managers for the tender offer. The offer’s tender agent and information agent was D.F. King & Co. Inc., the company said.

Oklahoma City-based Chesapeake Energy Corp. produces domestic natural gas and oil.