Sac Capital Advisors LLC, et al. – ‘SC 13G’ on 9/17/07 re: Cephalon Inc – EX-99.1

On:  Monday, 9/17/07, at 4:06pm ET   ·   Accession #:  899140-7-1561   ·   File #:  5-41753

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Statement of Beneficial Ownership   —   Schedule 13G
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: SC 13G      Statement of Beneficial Ownership                     11     42K 
 2: EX-99.1     Joint Filing Agreement                                 1      7K 

EX-99.1   —   Joint Filing Agreement

                                                                    Exhibit 99.1
JOINT FILING AGREEMENT

The undersigned hereby agree that the foregoing statement on Schedule 13G is    
filed on behalf of each of the undersigned in accordance with the provisions of 
Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and that   
all subsequent amendments to this statement on Schedule 13G may be filed on     
behalf of each of the undersigned without the necessity of filing additional    
joint filing agreements.                                                        

Dated:  September 17, 2007                                                      

S.A.C. CAPITAL ADVISORS, LLC                                                    

By: /s/ Peter Nussbaum                                                          
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Name:   Peter Nussbaum                                                          
Title:  Authorized Person                                                       

S.A.C. CAPITAL MANAGEMENT, LLC                                                  

By: /s/ Peter Nussbaum                                                          
-------------------------------                                           
Name:   Peter Nussbaum                                                          
Title:  Authorized Person                                                       

CR INTRINSIC INVESTORS, LLC                                                     

By: /s/ Peter Nussbaum                                                          
-------------------------------                                           
Name:   Peter Nussbaum                                                          
Title:  Authorized Person                                                       

SIGMA CAPITAL MANAGEMENT, LLC                                                   

By: /s/ Peter Nussbaum                                                          
-------------------------------                                           
Name:   Peter Nussbaum                                                          
Title:  Authorized Person                                                       

STEVEN A. COHEN                                                                 

By: /s/ Peter Nussbaum                                                          
-------------------------------                                           
Name:   Peter Nussbaum                                                          
Title:  Authorized Person                                                       

Dates Referenced Herein   and   Documents Incorporated by Reference

This ‘SC 13G’ Filing		Date		Other Filings
Filed on:		9/17/07		8-K,  SC 13G
				List all Filings