3M CO — Director's Dealing 2010

Aug 3, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2010-08-02

Reporting Person: Lobey Jean (EXEC VP SFTY SEC & PROT SVCS)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-08-02	Common Stock	M	19590	$54.11	Acquired	20735	Direct
2010-08-02	Common Stock	S	100	$86.92	Disposed	20635	Direct
2010-08-02	Common Stock	S	100	$86.9227	Disposed	20535	Direct
2010-08-02	Common Stock	S	100	$86.93	Disposed	20435	Direct
2010-08-02	Common Stock	S	100	$86.975	Disposed	20335	Direct
2010-08-02	Common Stock	S	100	$86.98	Disposed	20235	Direct
2010-08-02	Common Stock	S	100	$87.00	Disposed	20135	Direct
2010-08-02	Common Stock	S	150	$87.01	Disposed	19985	Direct
2010-08-02	Common Stock	S	2750	$87.02	Disposed	17235	Direct
2010-08-02	Common Stock	S	63	$87.04	Disposed	17172	Direct
2010-08-02	Common Stock	S	137	$87.05	Disposed	17035	Direct
2010-08-02	Common Stock	S	100	$87.055	Disposed	16935	Direct
2010-08-02	Common Stock	S	3400	$87.06	Disposed	13535	Direct
2010-08-02	Common Stock	S	3190	$87.08	Disposed	10345	Direct
2010-08-02	Common Stock	S	600	$87.09	Disposed	9745	Direct
2010-08-02	Common Stock	S	400	$87.10	Disposed	9345	Direct
2010-08-02	Common Stock	S	500	$87.11	Disposed	8845	Direct
2010-08-02	Common Stock	S	200	$87.115	Disposed	8645	Direct
2010-08-02	Common Stock	S	300	$87.12	Disposed	8345	Direct
2010-08-02	Common Stock	S	100	$87.13	Disposed	8245	Direct
2010-08-02	Common Stock	S	100	$87.1408	Disposed	8145	Direct
2010-08-02	Common Stock	S	3800	$87.15	Disposed	4345	Direct
2010-08-02	Common Stock	S	200	$87.155	Disposed	4145	Direct
2010-08-02	Common Stock	S	1600	$87.16	Disposed	2545	Direct
2010-08-02	Common Stock	S	200	$87.17	Disposed	2345	Direct
2010-08-02	Common Stock	S	300	$87.175	Disposed	2045	Direct
2010-08-02	Common Stock	S	200	$87.18	Disposed	1845	Direct
2010-08-02	Common Stock	S	400	$87.20	Disposed	1445	Direct
2010-08-02	Common Stock	S	100	$87.2019	Disposed	1345	Direct
2010-08-02	Common Stock	S	100	$87.2203	Disposed	1245	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-08-02	Non-qualified Stock Option (Right to Buy)	$54.11	M	19590	Disposed	2019-02-08	Common Stock (19590)	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 27, 2010.