3M CO — Director's Dealing 2006

Feb 7, 2006

SEC Form 5 — Annual Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2005-12-31

Reporting Person: IHLENFELD JAY V (VICE PRESIDENT R&D)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-05-09	Non-Qualified Stock Option (right to buy)	$64.4	J	902	Disposed	2005-05-06	Common Stock (902)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	28651	Direct
Common Stock	2596	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Incentive Stock Option (right to buy)	$43.35	2010-05-09	Common Stock (2306)	2306	Direct
Incentive Stock Option (right to buy)	$45.85	2007-05-13	Common Stock (1352)	1352	Direct
Incentive Stock Option (right to buy)	$46.675	2008-05-12	Common Stock (2142)	2142	Direct
Incentive Stock Option (right to buy)	$47.5	2009-05-10	Common Stock (2104)	2104	Direct
Incentive Stock Option (right to buy)	$58.625	2011-05-08	Common Stock (1704)	1704	Direct
Non-Qualified Stock Option (right to buy)	$61.85	2013-05-12	Common Stock (31414)	31414	Direct
Non-Qualified Stock Option (right to buy)	$64.4	2006-05-12	Common Stock (1468)	1468	Direct
Non-Qualified Stock Option (right to buy)	$64.4	2010-05-07	Common Stock (1560)	1560	Direct
Non-Qualified Stock Option (right to buy)	$64.5	2012-05-14	Common Stock (17400)	17400	Direct
Non-Qualified Stock Option (right to buy)	$69.35	2007-05-11	Common Stock (2392)	2392	Direct
Non-Qualified Stock Option (right to buy)	$69.35	2008-05-12	Common Stock (8)	8	Direct
Non-Qualified Stock Option (right to buy)	$69.35	2010-05-07	Common Stock (4644)	4644	Direct
Non-Qualified Stock Option (right to buy)	$75.2	2011-05-06	Common Stock (11581)	11581	Direct
Non-Qualified Stock Option (right to buy)	$75.2	2013-05-13	Common Stock (7163)	7163	Direct
Non-Qualified Stock Option (right to buy)	$76.8	2015-05-10	Common Stock (35593)	35593	Direct
Non-Qualified Stock Option (right to buy)	$81.7	2008-05-12	Common Stock (5979)	5979	Direct
Non-Qualified Stock Option (right to buy)	$81.7	2009-05-11	Common Stock (6073)	6073	Direct
Non-Qualified Stock Option (right to buy)	$81.7	2011-05-06	Common Stock (402)	402	Direct
Non-Qualified Stock Option (right to buy)	$84.4	2014-05-09	Common Stock (43714)	43714	Direct

Footnotes

F1: This transaction is an expiration of an employee stock option. No value was received by the reporting person for the expiration and it is being reported voluntarily for informational purposes. The expiration is exempt from the short-swing profits recovery provisions pursuant to Rule 16b-6(d) and is exempt from the reporting requirements pursuant to Rule 16a-4(d).