MUELLER INDUSTRIES INC — Director's Dealing 2012

May 10, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MUELLER INDUSTRIES INC (MLI)
CIK: 0000089439
Period of Report: 2012-05-03

Reporting Person: STEINBERG JOSEPH S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-03	Common Stock	A	1000	—	Acquired	1000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-03	Stock Option (Right to Buy)	$46.38	A	2000	Acquired	2022-05-03	Common Stock (2000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	10422859	Indirect

Footnotes

F1: These shares will vest on May 3, 2013.

F2: Reflects shares of Mueller Industries, Inc. common stock beneficially owned by Leucadia National Corporation ("Leucadia"). The Reporting Person is a significant shareholder and President of Leucadia. The Reporting Person disclaims beneficial ownership of the Issuer's common stock beneficially owned by Leucadia, except to the extent of his pecuniary interest, if any.