X0306 4/A 2017-02-07 2017-02-09 0000066740 3M CO MMM 0001577544 Roman Michael F 3M CENTER ST. PAUL MN 55144-1000 1 Executive Vice President Common Stock 2017-02-07 4 A 0 6752.296 0 A 12729 D Common Stock 2017-02-07 4 F 0 193.308 0 D 12536 D Non-qualified Stock Option (Right to Buy) 175.76 2017-02-07 4 A 0 52249 0 A 2018-02-07 2027-02-08 Common Stock 52249 52249 D Due to a computational error caused by a third-party vendor's filing software, the reporting person is refiling a report filed earlier today, solely to correct total holdings reported in Column 5 of Table 1. /s/ Sheila B. Claugherty, attorney-in-fact for Michael F. Roman 2017-02-09