3M CO — Director's Dealing 2010

May 5, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2010-05-03

Reporting Person: YEOMANS JAN L (VICE PRESIDENT AND TREASURER)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-03	Common Stock	M	1704	$58.625	Acquired	55914	Direct
2010-05-03	Common Stock	F	1112	$89.81	Disposed	54802	Direct
2010-05-03	Common Stock	S	2978	$89.44	Disposed	51824	Direct
2010-05-03	Common Stock	S	400	$89.45	Disposed	51424	Direct
2010-05-03	Common Stock	S	300	$89.451	Disposed	51124	Direct
2010-05-03	Common Stock	S	400	$89.46	Disposed	50724	Direct
2010-05-03	Common Stock	S	797	$89.47	Disposed	49927	Direct
2010-05-04	Common Stock	S	125	$87.556	Disposed	49802	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-03	Incentive Stock Option (Right to Buy)	$58.625	M	1704	Disposed	2011-05-08	Common Stock (1704)	Direct