3M CO — Director's Dealing 2004

Dec 21, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2004-12-17

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-10-29	Common Stock	G	64	—	Disposed	10734	Direct
2004-12-17	Common Stock	M	9914	$58.625	Acquired	20648	Direct
2004-12-17	Common Stock	F	7222	$80.47	Disposed	13426	Direct
2004-12-17	Common Stock	F	880	$80.47	Disposed	12546	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-12-17	Non-Qualified Stock Option (right to buy)	$58.625	M	9914	Disposed	2011-05-08	Common Stock (9914)	Direct
2004-12-17	Non-Qualified Stock Option (right to buy)	$80.5	A	8102	Acquired	2011-05-06	Common Stock (8102)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1705	Indirect
Common Stock	9614	Indirect