Following the receipt of the FERC authorization, Dynegy and an affiliate of IEP have received all regulatory approvals that are conditions to the closing of the tender offer begun by the affiliate of IEP on 22 December 2010.

On 15 December 2010, the company entered into an agreement and plan of merger with affiliates of IEP.

On 22 December 2010, affiliates of IEP commenced a tender offer to purchase all of the outstanding shares of Dynegy common stock for $5.50 per share in cash, or approximately $665m.