Acquisition of Ameristar Casinos, Inc. by Pinnacle Entertainment, Inc. May Not Be in Ameristar Casinos Shareholders' Best

Acquisition of Ameristar Casinos, Inc. by Pinnacle Entertainment, Inc. May Not
             Be in Ameristar Casinos Shareholders' Best Interests

PR Newswire

SAN DIEGO and LAS VEGAS, Dec. 21, 2012

SAN DIEGO andLAS VEGAS, Dec. 21, 2012 /PRNewswire/ --Shareholder rights
attorneys at Robbins Umeda LLP are investigating possible breaches of
fiduciary duty and other violations of the law by members of the board of
directors of Ameristar Casinos, Inc. (NASDAQ: ASCA) in connection with their
efforts to sell the company to Pinnacle Entertainment, Inc. (NYSE: PNK).


On December 21, 2012, Ameristar Casinos and Pinnacle Entertainment announced
they had entered into a definitive merger agreement under which Pinnacle
Entertainment will acquire Ameristar Casinos through an all cash offer.
Ameristar Casinos shareholders will receive $26.50 per share. The
transaction is expected to close in the third quarter of 2013.

The Board of Directors' Actions May Prevent Ameristar Casinos Shareholders
from Receiving the Maximum Value for Their Stock

Robbins Umeda LLP's investigation focuses on whether the board of directors at
Ameristar Casinos is undertaking a fair process to obtain maximum value and
adequately compensate its shareholders. The $26.50 per share offer price is
substantially below the $31 target price maintained by an analyst at Knight
Equity Research, and the $29 price set by an analyst at Imperial Capital.
Further, on October 31, 2012, Ameristar Casinos announced that the company's
third quarter of 2012 "was one of Ameristar's most profitable ever." Given,
these facts, the firm is examining whether the board of directors' decision to
sell Ameristar Casinos for $26.50 per share is fair to shareholders and
maximizes the value for their shares.

Ameristar Casinos shareholders have the option to file a class action lawsuit
against the company to secure the best possible price for shareholders and the
disclosure of material information so shareholders can vote on the transaction
in an informed manner. If you own Ameristar Casinos stock and are interested
in information about your rights and potential remedies, contact Darnell R.
Donahue at (800) 350-6003,, or via the shareholder
information form on the firm's website.

Robbins Umeda LLP is a nationally recognized leader in securities litigation
and shareholder rights law. The firm represents individual and institutional
investors in shareholder derivative and securities class action lawsuits, and
has helped its clients realize more than $1 billion of value for themselves
and the companies in which they have invested. For more information, please
go to

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Attorney Advertising. Past results do not guarantee a similar outcome.

Robbins Umeda LLP
Darnell R. Donahue
(619) 525-3990 or Toll Free (800) 350-6003

SOURCE Robbins Umeda LLP

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