3M CO — Director's Dealing 2010

Aug 2, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2010-07-30

Reporting Person: PALENSKY FRED J (EXEC VP R&D & CHF TECH OFF)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-07-30	Common Stock	M	5463	$76.45	Acquired	45013	Direct
2010-07-30	Common Stock	S	5463	$86.00	Disposed	39550	Direct
2010-07-30	Common Stock	M	9684	$79.05	Acquired	49234	Direct
2010-07-30	Common Stock	S	9684	$86.00	Disposed	39550	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-07-30	Non-qualified Stock Option (Right to Buy)	$76.45	M	5463	Disposed	2011-05-06	Common Stock (5463)	Direct
2010-07-30	Non-qualified Stock Option (Right to Buy)	$79.05	M	9684	Disposed	2011-05-06	Common Stock (9684)	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 July 29, 2010.