3M CO — Director's Dealing 2014

May 2, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2014-05-01

Reporting Person: Gangestad Nicholas C (VP CORP CNTRLR & CF ACCTG OFC)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-01	Common Stock	M	6069	$87.35	Acquired	12519	Direct
2014-05-01	Common Stock	S	2200	$140.346	Disposed	10319	Direct
2014-05-01	Common Stock	S	900	$140.355	Disposed	9419	Direct
2014-05-01	Common Stock	S	2969	$140.3589	Disposed	6450	Direct
2014-05-01	Common Stock	G	400	—	Disposed	6050	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-05-01	Non-qualified Stock Option (Right to Buy)	$87.35	M	6069	Disposed	2016-05-09	Common Stock (6069)	Direct