X0306 4 2013-04-30 0000066740 3M CO MMM 0001465913 Delgado Joaquin 3M CENTER ST. PAUL MN 55144-1000 1 Executive Vice President Common Stock 2013-04-30 4 S 0 611 104.25 D 12263 D Common Stock 2013-04-30 4 S 0 1462 104.26 D 10801 D Common Stock 2013-04-30 4 S 0 1108 104.27 D 9693 D Common Stock 2013-04-30 4 S 0 1008 104.28 D 8685 D Common Stock 2013-04-30 4 S 0 407 104.29 D 8278 D Common Stock 2013-04-30 4 S 0 707 104.30 D 7571 D Common Stock 2013-04-30 4 S 0 1044 104.31 D 6527 D Common Stock 2013-04-30 4 S 0 144 104.32 D 6383 D Common Stock 2013-04-30 4 S 0 1200 104.34 D 5183 D Common Stock 2013-04-30 4 M 0 16762 84.40 A 21945 D Common Stock 2013-04-30 4 S 0 143 104.32 D 21802 D Common Stock 2013-04-30 4 S 0 2114 104.33 D 19688 D Common Stock 2013-04-30 4 S 0 1500 104.34 D 18188 D Common Stock 2013-04-30 4 S 0 500 104.35 D 17688 D Common Stock 2013-04-30 4 S 0 2700 104.36 D 14988 D Common Stock 2013-04-30 4 S 0 2503 104.37 D 12485 D Common Stock 2013-04-30 4 S 0 2600 104.38 D 9885 D Common Stock 2013-04-30 4 S 0 1396 104.39 D 8489 D Common Stock 2013-04-30 4 S 0 1406 104.40 D 7083 D Common Stock 2013-04-30 4 S 0 400 104.41 D 6683 D Common Stock 2013-04-30 4 S 0 1300 104.42 D 5383 D Common Stock 2013-04-30 4 S 0 200 104.425 D 5183 D Common Stock 1009 I By 401k/paesop Trust Non-qualified Stock Option (Right to Buy) 84.40 2013-04-30 4 M 0 16762 0 D 2005-05-11 2014-05-09 Common Stock 16762 0 D Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan. /s/ George Ann Biros, attorney-in-fact for Joaquin Delgado 2013-05-01