3M CO — Director's Dealing 2018

May 10, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2018-05-08

Reporting Person: COFFMAN VANCE D (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-08	Common Stock	A	338	—	Acquired	41954	Indirect
2018-05-08	Common Stock	A	5	—	Acquired	41616	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	6628	Direct

Footnotes

F1: This non-employee director has elected to defer all or a portion of compensation otherwise payable in cash or stock to a common stock equivalents account under the terms of 3M's Compensation Plan for Non-employee Directors and has no voting or investment powers with respect to such account.

F2: This reported transaction reflects an increase in the Annual Cash Retainer portion of the non-employee director compensation, effective January 1, 2018, that was approved by the Board of Directors on May 8, 2018.

F3: Includes acquisition of deferred dividend reinvestment shares pursuant to 3M's Compensation Plan for Non-Employee Directors.

F4: Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan.