3M CO — Director's Dealing 2012

May 3, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2012-05-02

Reporting Person: Kelly Michael A (EXEC VP DISPLAY & GRAPHICS)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-02	Common Stock	M	5383	$88.67	Acquired	13776	Direct
2012-05-02	Common Stock	S	5383	$89.50	Disposed	8393	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-02	Non-qualified Stock Option (Right to Buy)	$88.67	M	5383	Disposed	2012-05-14	Common Stock (5383)	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 15, 2012.