3M CO — Director's Dealing 2010

Apr 28, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2010-04-27

Reporting Person: Shin Hak Cheol (EXEC VP INDUSTRIAL)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-04-27	Common Stock	M	5867	$76.00	Acquired	19764	Direct
2010-04-27	Common Stock	S	5867	$90.00	Disposed	13897	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-04-27	Non-qualified Stock Option (Right to Buy)	$76.00	M	5867	Disposed	2010-05-07	Common Stock (5867)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1246	Indirect

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 11, 2010.

F2: Includes shares acquired under 3M's General Employee Stock Purchase Plan.

F3: Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan.