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	M	10000	$54.11	Acquired	11632	Direct
2010-07-30	Common Stock	S	100	$84.8654	Disposed	11532	Direct
2010-07-30	Common Stock	S	100	$84.90	Disposed	11432	Direct
2010-07-30	Common Stock	S	100	$84.9054	Disposed	11332	Direct
2010-07-30	Common Stock	S	234	$84.91	Disposed	11098	Direct
2010-07-30	Common Stock	S	34	$84.9106	Disposed	11064	Direct
2010-07-30	Common Stock	S	132	$84.92	Disposed	10932	Direct
2010-07-30	Common Stock	S	100	$84.93	Disposed	10832	Direct
2010-07-30	Common Stock	S	100	$84.94	Disposed	10732	Direct
2010-07-30	Common Stock	S	100	$84.95	Disposed	10632	Direct
2010-07-30	Common Stock	S	100	$84.96	Disposed	10532	Direct
2010-07-30	Common Stock	S	100	$84.9654	Disposed	10432	Direct
2010-07-30	Common Stock	S	300	$84.97	Disposed	10132	Direct
2010-07-30	Common Stock	S	100	$84.9704	Disposed	10032	Direct
2010-07-30	Common Stock	S	100	$84.9754	Disposed	9932	Direct
2010-07-30	Common Stock	S	100	$84.9819	Disposed	9832	Direct
2010-07-30	Common Stock	S	200	$85.00	Disposed	9632	Direct
2010-07-30	Common Stock	S	100	$85.0013	Disposed	9532	Direct
2010-07-30	Common Stock	S	100	$85.01	Disposed	9432	Direct
2010-07-30	Common Stock	S	100	$85.0154	Disposed	9332	Direct
2010-07-30	Common Stock	S	100	$85.0172	Disposed	9232	Direct
2010-07-30	Common Stock	S	500	$85.02	Disposed	8732	Direct
2010-07-30	Common Stock	S	400	$85.03	Disposed	8332	Direct
2010-07-30	Common Stock	S	300	$85.04	Disposed	8032	Direct
2010-07-30	Common Stock	S	300	$85.05	Disposed	7732	Direct
2010-07-30	Common Stock	S	100	$85.0554	Disposed	7632	Direct
2010-07-30	Common Stock	S	100	$85.06	Disposed	7532	Direct
2010-07-30	Common Stock	S	300	$85.07	Disposed	7232	Direct
2010-07-30	Common Stock	S	100	$85.0772	Disposed	7132	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-07-30	Non-qualified Stock Option (Right to Buy)	$54.11	M	10000	Disposed	2019-02-08	Common Stock (10000)	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.