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: SMITH MARSCHALL (VICE PRESIDENT LEGAL)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-07-30	Common Stock	S	100	$85.0854	Disposed	7032	Direct
2010-07-30	Common Stock	S	500	$85.12	Disposed	6532	Direct
2010-07-30	Common Stock	S	100	$85.1254	Disposed	6432	Direct
2010-07-30	Common Stock	S	300	$85.13	Disposed	6132	Direct
2010-07-30	Common Stock	S	100	$85.1572	Disposed	6032	Direct
2010-07-30	Common Stock	S	100	$85.17	Disposed	5932	Direct
2010-07-30	Common Stock	S	100	$85.185	Disposed	5832	Direct
2010-07-30	Common Stock	S	100	$85.19	Disposed	5732	Direct
2010-07-30	Common Stock	S	100	$85.20	Disposed	5632	Direct
2010-07-30	Common Stock	S	100	$85.22	Disposed	5532	Direct
2010-07-30	Common Stock	S	300	$85.23	Disposed	5232	Direct
2010-07-30	Common Stock	S	100	$85.25	Disposed	5132	Direct
2010-07-30	Common Stock	S	300	$85.26	Disposed	4832	Direct
2010-07-30	Common Stock	S	100	$85.2644	Disposed	4732	Direct
2010-07-30	Common Stock	S	100	$85.27	Disposed	4632	Direct
2010-07-30	Common Stock	S	200	$85.28	Disposed	4432	Direct
2010-07-30	Common Stock	S	100	$85.283	Disposed	4332	Direct
2010-07-30	Common Stock	S	100	$85.30	Disposed	4232	Direct
2010-07-30	Common Stock	S	100	$85.32	Disposed	4132	Direct
2010-07-30	Common Stock	S	100	$85.33	Disposed	4032	Direct
2010-07-30	Common Stock	S	300	$85.34	Disposed	3732	Direct
2010-07-30	Common Stock	S	100	$85.3451	Disposed	3632	Direct
2010-07-30	Common Stock	S	400	$85.36	Disposed	3232	Direct
2010-07-30	Common Stock	S	100	$85.3672	Disposed	3132	Direct
2010-07-30	Common Stock	S	100	$85.3698	Disposed	3032	Direct
2010-07-30	Common Stock	S	100	$85.38	Disposed	2932	Direct
2010-07-30	Common Stock	S	100	$85.385	Disposed	2832	Direct
2010-07-30	Common Stock	S	100	$85.39	Disposed	2732	Direct
2010-07-30	Common Stock	S	100	$85.40	Disposed	2632	Direct
2010-07-30	Common Stock	S	100	$85.43	Disposed	2532	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 May 11, 2010.