3M CO — Director's Dealing 2010

May 11, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2010-05-10

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-10	Common Stock	S	20	$85.43	Disposed	10766	Direct
2010-05-10	Common Stock	S	2020	$85.44	Disposed	8746	Direct
2010-05-10	Common Stock	S	100	$85.4436	Disposed	8646	Direct
2010-05-10	Common Stock	S	2381	$85.45	Disposed	6265	Direct
2010-05-10	Common Stock	S	2100	$85.46	Disposed	4165	Direct
2010-05-10	Common Stock	S	600	$85.47	Disposed	3565	Direct
2010-05-10	Common Stock	S	100	$85.475	Disposed	3465	Direct
2010-05-10	Common Stock	S	1720	$85.48	Disposed	1745	Direct
2010-05-10	Common Stock	S	200	$85.485	Disposed	1545	Direct
2010-05-10	Common Stock	S	200	$85.515	Disposed	1345	Direct
2010-05-10	Common Stock	S	200	$85.54	Disposed	1145	Direct

Footnotes

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