X0304 4 2012-02-10 0000066740 3M CO MMM 0001215821 BUCKLEY GEORGE W 3M CENTER ST. PAUL MN 55144-1000 1 1 CHAIRMAN OF THE BOARD & CEO Common Stock 2012-02-10 4 S 0 428 86.8575 D 405309 D Common Stock 2012-02-10 4 S 0 572 86.859 D 404737 D Common Stock 2012-02-10 4 S 0 3888 86.86 D 400849 D Common Stock 2012-02-10 4 S 0 100 86.8618 D 400749 D Common Stock 2012-02-10 4 S 0 13700 86.865 D 387049 D Common Stock 2012-02-10 4 S 0 400 86.869 D 386649 D Common Stock 2012-02-10 4 S 0 3000 86.87 D 383649 D Common Stock 2012-02-10 4 S 0 9400 86.875 D 374249 D Common Stock 2012-02-10 4 S 0 700 86.8775 D 373549 D Common Stock 2012-02-10 4 S 0 130 86.879 D 373419 D Common Stock 2012-02-10 4 S 0 4116 86.88 D 369303 D Common Stock 2012-02-10 4 S 0 11861 86.885 D 357442 D Common Stock 2012-02-10 4 S 0 700 86.8875 D 356742 D Common Stock 2012-02-10 4 S 0 200 86.889 D 356542 D Common Stock 2012-02-10 4 S 0 800 86.89 D 355742 D Common Stock 2012-02-10 4 S 0 3700 86.895 D 352042 D Common Stock 2012-02-10 4 S 0 100 86.8975 D 351942 D Common Stock 2012-02-10 4 S 0 13143 86.90 D 338799 D Common Stock 2012-02-10 4 S 0 6918 86.905 D 331881 D Common Stock 2012-02-10 4 S 0 100 86.9075 D 331781 D Common Stock 2012-02-10 4 S 0 100 86.909 D 331681 D Common Stock 2012-02-10 4 S 0 3838 86.91 D 327843 D Common Stock 2012-02-10 4 S 0 10800 86.915 D 317043 D Common Stock 2012-02-10 4 S 0 200 86.9175 D 316843 D Common Stock 2012-02-10 4 S 0 8972 86.92 D 307871 D Common Stock 2012-02-10 4 S 0 11814 86.925 D 296057 D Common Stock 2012-02-10 4 S 0 800 86.9275 D 295257 D Common Stock 2012-02-10 4 S 0 200 86.929 D 295057 D Common Stock 2012-02-10 4 S 0 3660 86.93 D 291397 D Common Stock 2012-02-10 4 S 0 6210 86.935 D 285187 D George Ann Biros, attorney-in-fact for George W. Buckley 2012-02-13