3M CO — Director's Dealing 2016

May 13, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2016-05-12

Reporting Person: Singh Jesse G (Senior Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-12	Common Stock	S	100	$169.92	Disposed	6339	Direct
2016-05-12	Common Stock	S	300	$169.93	Disposed	6039	Direct
2016-05-12	Common Stock	S	400	$169.94	Disposed	5639	Direct
2016-05-12	Common Stock	S	100	$169.96	Disposed	5539	Direct
2016-05-12	Common Stock	S	964	$169.97	Disposed	4575	Direct
2016-05-12	Common Stock	M	10922	$89.47	Acquired	15497	Direct
2016-05-12	Common Stock	S	522	$169.88	Disposed	14975	Direct
2016-05-12	Common Stock	S	100	$169.905	Disposed	14875	Direct
2016-05-12	Common Stock	S	10300	$169.96	Disposed	4575	Direct
2016-05-12	Common Stock	M	12497	$87.89	Acquired	17072	Direct
2016-05-12	Common Stock	S	97	$169.84	Disposed	16975	Direct
2016-05-12	Common Stock	S	100	$169.86	Disposed	16875	Direct
2016-05-12	Common Stock	S	200	$169.895	Disposed	16675	Direct
2016-05-12	Common Stock	S	200	$169.91	Disposed	16475	Direct
2016-05-12	Common Stock	S	100	$169.94	Disposed	16375	Direct
2016-05-12	Common Stock	S	11700	$169.95	Disposed	4675	Direct
2016-05-12	Common Stock	S	100	$170.035	Disposed	4575	Direct
2016-05-12	Common Stock	M	9795	$101.49	Acquired	14370	Direct
2016-05-12	Common Stock	S	95	$169.99	Disposed	14275	Direct
2016-05-12	Common Stock	S	6800	$170.005	Disposed	7475	Direct
2016-05-12	Common Stock	S	2600	$170.01	Disposed	4875	Direct
2016-05-12	Common Stock	S	300	$170.03	Disposed	4575	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-12	Non-qualified Stock Option (Right to Buy)	$78.72	M	8906	Disposed	2020-02-07	Common Stock (8906)	Direct
2016-05-12	Non-qualified Stock Option (Right to Buy)	$78.72	M	3564	Disposed	2020-02-07	Common Stock (3564)	Direct
2016-05-12	Non-qualified Stock Option (Right to Buy)	$89.47	M	10922	Disposed	2021-02-08	Common Stock (10922)	Direct
2016-05-12	Non-qualified Stock Option (Right to Buy)	$87.89	M	12497	Disposed	2022-02-07	Common Stock (12497)	Direct
2016-05-12	Non-qualified Stock Option (Right to Buy)	$101.49	M	9795	Disposed	2023-02-03	Common Stock (9795)	Direct

Footnotes

F1: This option becomes exercisable in equal installments on each of the first three anniversaries of the grant date (2/8/2011).

F2: This option becomes exercisable in equal installments on each of the first three anniversaries of the grant date (2/5/2013).

F3: This option becomes exercisable in equal installments on each of the first three anniversaries of the grant date (2/5/2013).