3M CO — Director's Dealing 2016

May 4, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2016-05-02

Reporting Person: Singh Jesse G (Senior Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-02-05	Common Stock	G	247	—	Disposed	4435	Direct
2016-05-02	Common Stock	M	6736	$84.78	Acquired	11311	Direct
2016-05-02	Common Stock	S	6736	$167.9973	Disposed	4575	Direct
2016-05-02	Common Stock	M	12616	$77.18	Acquired	17191	Direct
2016-05-02	Common Stock	S	7022	$167.84	Disposed	10169	Direct
2016-05-02	Common Stock	S	300	$167.85	Disposed	9869	Direct
2016-05-02	Common Stock	S	300	$167.86	Disposed	9569	Direct
2016-05-02	Common Stock	S	300	$167.87	Disposed	9269	Direct
2016-05-02	Common Stock	S	1100	$167.88	Disposed	8169	Direct
2016-05-02	Common Stock	S	500	$167.89	Disposed	7669	Direct
2016-05-02	Common Stock	S	200	$167.90	Disposed	7469	Direct
2016-05-02	Common Stock	S	500	$167.91	Disposed	6969	Direct
2016-05-02	Common Stock	S	242	$167.92	Disposed	6727	Direct
2016-05-02	Common Stock	S	647	$167.93	Disposed	6080	Direct
2016-05-02	Common Stock	S	100	$167.95	Disposed	5980	Direct
2016-05-02	Common Stock	S	1405	$167.96	Disposed	4575	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-02	Non-qualified Stock Option (Right to Buy)	$84.78	M	6736	Disposed	2017-05-08	Common Stock (6736)	Direct
2016-05-02	Non-qualified Stock Option (Right to Buy)	$77.18	M	12616	Disposed	2018-05-13	Common Stock (12616)	Direct