3M CO — Director's Dealing 2012

Jun 1, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2012-05-31

Reporting Person: BUCKLEY GEORGE W (VP; former COB, CEO & Pres.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-31	Common Stock	M	1355	$84.41	Acquired	191524	Direct
2012-05-31	Common Stock	F	579	$84.41	Disposed	190945	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-31	Restricted Stock Units	$	M	1355	Disposed		Common Stock (1355)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	631	Indirect
Common Stock	27958.634	Indirect

Footnotes

F1: Each restricted stock unit represents a contingent right to receive one share of 3M common stock.

F2: The terms of the initial award (5,420 restricted stock units) provided for vesting in four equal installments commencing 12/31/2009.

F3: Includes shares acquired under 3M's General Employee Stock Purchase Plan.

F4: Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan.

F5: Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Performance Awards Deferred Compensation Plan.