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: ALVARADO LINDA G (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-13	Common Stock	A	1105	—	Acquired	16665	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	9864	Indirect

Footnotes

F1: Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan.

F2: Includes acquisition of deferred dividend reinvestment shares pursuant to 3M's Compensation Plan for Non- Employee Directors.