3M CO — Director's Dealing 2010

Jan 20, 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: SMITH MARSCHALL (VICE PRESIDENT LEGAL)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2009-12-31	Common Stock	J	1193	—	Disposed	13035	Direct
2009-12-31	Common Stock	J	11403	—	Disposed	1632	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2009-12-31	Restricted Stock Units	$	J	1193	Acquired		Common Stock (1193)	Direct
2009-12-31	Restricted Stock Units	$	J	11403	Acquired		Common Stock (11403)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	351	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 during the fiscal year pursuant to the 3M Voluntary Investment Plan.

F4: The terms of the initial award (3,577 restricted stock units) provided for vesting in three equal annual installments on the anniversary of the grant date (7/16/2007).

F5: The restricted stock units will vest 100% three years from the grant date (2/9/2009).