3M CO — Director's Dealing 2014

May 15, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2014-05-13

Reporting Person: MORRISON ROBERT S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-13	Common Stock	A	523	—	Acquired	28787	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	254	Indirect

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

F3: Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan.