3M CO — Director's Dealing 2005

Dec 13, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2005-12-12

Reporting Person: MacDonald Robert D III (VICE PRESIDENT MARKETING)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-12-12	Common Stock	M	3172	$31.5175	Acquired	20198	Direct
2005-12-12	Common Stock	F	1290	$77.47	Disposed	18908	Direct
2005-12-12	Common Stock	M	5220	$61.85	Acquired	24128	Direct
2005-12-12	Common Stock	F	4167	$77.47	Disposed	19961	Direct
2005-12-12	Common Stock	F	344	$77.47	Disposed	19617	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-12-12	Incentive Stock Option (right to buy)	$31.5175	M	3172	Disposed	2006-05-14	Common Stock (3172)	Direct
2005-12-12	Non-Qualified Stock Option (right to buy)	$61.85	M	5220	Disposed	2006-05-12	Common Stock (5220)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1867	Indirect
Common Stock	9614	Indirect