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     Delaware     
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        1-6770        
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     25-0790410     
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 (State or other 
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 (Commission File 
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 (IRS Employer 
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 jurisdiction of 
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 Number) 
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        Identification No.) 
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 incorporation) 
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 o Written communications pursuant to Rule 425 under the Securities Act 
         (17 CFR 230.425) 
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 o Soliciting material pursuant to Rule 14a-12 under the Exchange Act 
         (17 CFR 240.14a-12) 
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 o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act 
        (17 CFR 240.14d-2(b)) 
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 o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act 
        (17 CFR 240.13e-4(c)) 
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 MUELLER INDUSTRIES, INC. 
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 By: 
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 /s/ Gary C. Wilkerson                                   
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 Name:  Gary C. Wilkerson 
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 Title:    Vice President, General Counsel and 
Secretary  | 
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 Date:  December 20, 2010 
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 Exhibit No. 
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 Description 
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 99.1 
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 Press release, dated December 20, 2010. 
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