3M CO — Director's Dealing 2021

May 4, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2021-05-03

Reporting Person: Roman Michael F (Director, Chairman and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-03	Common Stock	M	9747	$87.89	Acquired	73917.5329	Direct
2021-05-03	Common Stock	S	6803	$197.795	Disposed	67114.5329	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-03	Non-qualified Stock Option (Right to Buy)	$87.89	M	9747	Disposed	2022-02-07	Common Stock (9747)	Direct

Footnotes

F1: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 17, 2020.

F2: Includes shares acquired under 3M's General Employee Stock Purchase Plan.

F3: Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan.

F4: This option becomes exercisable in equal installments on each of the first three anniversaries of the grant date (2/7/2012).