X0202 4 2008-03-12 0000066740 3M CO MMM 0001215821 BUCKLEY GEORGE W 3M CENTER ST. PAUL MN 55144-1000 1 1 CHAIRMAN OF THE BOARD & CEO Common Stock 2008-03-12 4 F 0 27 80.072 D 191842 D Common Stock 355 I By 401k/paesop Trust Distribution of shares as a result of vesting of a portion of the restricted stock units (including shares withheld for taxes). Includes dividend units accrued quarterly on restricted stock units, shares acquired pursuant to 3M?s Dividend Reinvestment Program and shares acquired during the fiscal year pursuant to 3M?s General Employee Stock Purchase Plan. Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan. George Ann Biros, attorney-in-fact for George W. Buckley 2008-03-14