Ameristar Casinos sees Pinnacle Entertainment merger closing in Q2 or Q3 As previously announced, Ameristar Casinos (ASCA) entered into an agreement and plan of merger with Pinnacle Entertainment (PNK), pursuant to which Pinnacle will acquire all of the outstanding common shares of Ameristar for $26.50 per share in cash. The merger is subject to customary closing conditions, required regulatory approvals and approval by Ameristar's stockholders. The transaction is expected to close in the second or third quarter of 2013. Ameristar and Pinnacle filed the required Hart-Scott-Rodino premerger notification and report forms on Jan. 11. Pinnacle has filed applications for regulatory approvals as required under applicable gaming laws. On Feb. 1, Ameristar filed a preliminary proxy statement with the Securities and Exchange Commission relating to a special meeting of Ameristar's stockholders to consider and approve the merger agreement.