Company name HBK Master Fund LP
Headline Form 8.3 - Cooper Industries Plc


Form 8.3 - Cooper Industries Plc
FORM 8.3

                             IRISH TAKEOVER PANEL                              

   DISCLOSURE UNDER RULE 8.3 OF THE IRISH TAKEOVER PANEL ACT, 1997, TAKEOVER   
                           RULES, 2007 (AS AMENDED)                            

 DEALINGS BY PERSONS WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR  
                                     MORE                                      

1. KEY INFORMATION

Name of person dealing (Note 1)                          HBK Master Fund LP  
                                                         and/or one or more  
                                                         of its direct or    
                                                         indirect            
                                                         subsidiaries        
                                                                             
Company dealt in                                         Cooper Industries   
                                                         Plc                 
                                                                             
Class of relevant security to which the dealings being   US$0.01 ordinary    
disclosed relate (Note 2)                                shares (Isin:       
                                                         IE00B40K9117)       
                                                                             
Date of dealing                                          11th July 2012      

2. INTERESTS AND SHORT POSITIONS

(a) Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 3)

Class of relevant security:    US$0.01 ordinary shares (Isin: IE00B40K9117)  
                                                                             
                                      Interests            Short positions   
                                                                             
                                   Number         %          Number       %  
                                                                             
(1) Relevant security               100        0.0001%                       
                                                                             
(2) Derivatives (other than      4,100,100     2.5758%                       
options):                                                                    
                                                                             
(3) Options and agreements to                                                
purchase/sell:                                                               
                                                                             
TOTAL:                           4,100,100     2.5759%                       

(b) Interests and short positions in relevant securities of the company, other
than the class dealt in (Note 3)

Class of relevant security:                                                  
                                                                             
                                     Interests            Short positions    
                                                                             
                                    Number        %        Number         %  
                                                                             
(1) Relevant security                                                        
                                                                             
(2) Derivatives (other than                                                  
options):                                                                    
                                                                             
(3) Options and agreements to                                                
purchase/sell:                                                               
                                                                             
TOTAL:                                                                       

3. DEALINGS (Note 4)

(a) Purchases and sales

            Purchase/sale             Number of relevant    Price per unit   
                                          securities           (Note 5)      
                                                                             

(b) Derivatives transactions (other than options transactions)

    Product description     Nature of transaction   Number of     Price per  
         e.g. CFD                  (Note 6)         relevant    unit (Note 5)
                                                   securities                
                                                     (Note 7)                
                                                                             
     Total Return Swap          Increased Long       150,000     66.4410 USD 
                                                                             
     Total Return Swap          Increased Long        50,000     66.5739 USD 
                                                                             
     Total Return Swap          Increased Long        50,000     66.5874 USD 
                                                                             
     Total Return Swap          Increased Long        50,000     66.5568 USD 

(c) Options transactions in respect of existing relevant securities

(i) Writing, selling, purchasing or varying

Product name e.g.  Writing,   Number of  Exercise    Type    Expiry  Option  
   call option     selling,   securities   price     e.g.     date   money   
                  purchasing,  to which            American,         paid/   
                    varying     option             European         received 
                     etc.      relates               etc.           per unit 
                                                                             

(ii) Exercising

             Product name                   Number of      Exercise price per
           e.g. call option                securities        unit (Note 5)   
                                                                             

(d) Other dealings (including transactions in respect of new securities.
(Note4)

          Nature of transaction                Details        Price per unit 
                (Note 8)                                     (if applicable) 
                                                                 (Note 5)    
                                                                             

4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the      
person disclosing and any other person relating to the voting rights of any  
relevant securities under any option referred to on this form or relating to 
the voting rights or future acquisition or disposal of any relevant          
securities to which any derivative referred to on this form is referenced. If
none, this should be stated.                                                 
                                                                             

Is a Supplemental Form 8 attached? (Note 9)                       YES/NO     

Date of disclosure:                    12th July 2012                        
                                                                             
Contact name:                          Jon Mosle                             
                                                                             
Telephone number:                      001 214 758 6153                      
                                                                             
If a connected EFM, name of offeree/   N/A                                   
offeror with which connected                                                 
                                                                             
If a connected EFM, state nature of    N/A                                   
connection (Note 10)