3M CO — Director's Dealing 2010

Jul 29, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2010-07-27

Reporting Person: MacDonald Robert D III (VICE PRESIDENT MARKETING)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-02-01	Common Stock	G	93	—	Disposed	27222	Direct
2010-07-27	Common Stock	M	15800	$64.50	Acquired	43022	Direct
2010-07-27	Common Stock	F	11740	$86.80	Disposed	31282	Direct
2010-07-27	Common Stock	F	1327	$86.80	Disposed	29955	Direct
2010-07-27	Common Stock	M	17380	$61.85	Acquired	47335	Direct
2010-07-27	Common Stock	F	12384	$86.80	Disposed	34951	Direct
2010-07-27	Common Stock	F	1825	$86.80	Disposed	33126	Direct
2010-07-27	Common Stock	M	4182	$58.625	Acquired	37308	Direct
2010-07-27	Common Stock	F	2824	$86.80	Disposed	34484	Direct
2010-07-27	Common Stock	F	579	$86.80	Disposed	33905	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-07-27	Non-qualified Stock Option (Right to Buy)	$58.625	M	4182	Disposed	2011-05-06	Common Stock (4182)	Direct
2010-07-27	Non-qualified Stock Option (Right to Buy)	$64.50	M	15800	Disposed	2012-05-14	Common Stock (15800)	Direct
2010-07-27	Non-qualified Stock Option (Right to Buy)	$61.85	M	17380	Disposed	2013-05-12	Common Stock (17380)	Direct
2010-07-27	Non-qualified Stock Option (Right to Buy)	$86.80	A	3403	Acquired	2011-05-06	Common Stock (3403)	Direct
2010-07-27	Non-qualified Stock Option (Right to Buy)	$86.80	A	14209	Acquired	2013-05-13	Common Stock (14209)	Direct
2010-07-27	Non-qualified Stock Option (Right to Buy)	$86.80	A	13067	Acquired	2012-05-14	Common Stock (13067)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2604	Indirect

Footnotes

F1: Includes shares acquired under 3M's General Employee Stock Purchase Plan.

F2: Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan.