3M CO — Director's Dealing 2016

May 6, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2016-05-04

Reporting Person: Gangestad Nicholas C (Sr. VP & CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-04	Common Stock	M	2612	$84.78	Acquired	20240	Direct
2016-05-04	Common Stock	S	2612	$166.52	Disposed	17628	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-04	Non-qualified Stock Option (Right to Buy)	$84.78	M	2612	Disposed	2017-05-08	Common Stock (2612)	Direct

Footnotes

F1: Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan.