3M CO — Director's Dealing 2010

Jan 12, 2010

SEC Form 5 — Annual Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2009-12-31

Reporting Person: Harlan Joe E (EXEC VP ELECTRO & COMMUN)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2009-12-10	Common Stock	G	130	—	Disposed	45947	Direct
2009-12-18	Common Stock	G	155	—	Disposed	45792	Direct
2009-12-31	Common Stock	J	12937	—	Disposed	32855	Direct
2009-12-31	Common Stock	J	25481	—	Disposed	7374	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2009-12-31	Restricted Stock Units	$	J	12937	Acquired		Common Stock (12937)	Direct
2009-12-31	Restricted Stock Units	$	J	25481	Acquired		Common Stock (25481)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1070	Indirect

Footnotes

F1: Due to reporting automation changes instituted by Issuer's stock plan vendor, the reporting person's restricted stock units will be reported on Table II going forward. This transaction indicates the number of restricted stock units that will be transferred to Table II.

F2: Each restricted stock unit represents a contingent right to receive one share of 3M common stock.

F3: Includes shares acquired under 3M's General Employee Stock Purchase Plan; includes shares acquired under 3M's Dividend Reinvestment Program.

F4: The restricted stock units will vest 100% three years from the grant date (2/9/2009)

F5: The restricted stock units will vest 100% three years from the grant date (3/3/2008).