X0204 3 2011-09-02 0 0000089439 MUELLER INDUSTRIES INC MLI 0000924255 STEINBERG JOSEPH S C/O LEUCADIA NATIONAL CORPORATION 315 PARK AVENUE SOUTH NEW YORK NY 10010 1 0 0 0 Common Stock 0 D Common Stock 10422859 I See Explanation Reflects 10,422,859 shares of Mueller Industries, Inc. ("Mueller") common stock beneficially owned by Leucadia National Corporation ("Leucadia"). The Reporting Person is a significant shareholder, a director and the President of Leucadia. The Reporting Person disclaims beneficial ownership of the Mueller common stock owned by Leucadia, except to the extent of his pecuniary interest, if any. /s/ Joseph S. Steinberg 2011-09-08