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: PALENSKY FRED J (EXEC VP ENTERPRISE SVCS)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-10-21	Common Stock	G	70	—	Disposed	32184	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-05-09	Non-Qualified Stock Option (right to buy)	$62.85	J	4186	Disposed	2005-05-06	Common Stock (4186)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3292	Indirect

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).