3M CO — Director's Dealing 2012

Dec 18, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2012-12-14

Reporting Person: Hardgrove Ian F (VP, Marketing and Sales)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-12-12	Common Stock	G	407	—	Disposed	7859	Direct
2012-12-14	Common Stock	M	8295	$61.85	Acquired	16154	Direct
2012-12-14	Common Stock	F	5559	$92.28	Disposed	10595	Direct
2012-12-14	Common Stock	F	1099	$92.28	Disposed	9496	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-12-14	Non-qualified Stock Option (Right to Buy)	$61.85	M	8295	Disposed	2013-05-13	Common Stock (8295)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	760	Indirect

Footnotes

F1: This Form is being filed to report the exercise of a 3M stock option for a total of 8,295 shares by means of a stock swap. A stock swap is a method of exercising a stock option in which the option holder attests to the ownership of enough shares of stock already owned by the option holder to cover the exercise price of the option being exercised. As a result of this stock swap, the reporting person acquired ownership of an additional 1,637 shares of 3M common stock. As a result of this transaction, 1099 shares were sold to pay withholding taxes to the respective government agencies.

F2: Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan.