Sec Form 4 Filing - BUCKLEY GEORGE W @ 3M CO - 2012-02-10

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person BUCKLEY GEORGE W 2. Issuer Name and Ticker or Trading Symbol 3M CO [ MMM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) CHAIRMAN OF THE BOARD & CEO (Last) (First) (Middle) 3M CENTER 3. Date of Earliest Transaction (MM/DD/YY) 02/10/2012 (Street) ST. PAUL, MN55144-1000 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/10/2012 M 289,044 A $ 54.11 479,121 D Common Stock 02/10/2012 S 4,109 D $ 86.755 475,012 D Common Stock 02/10/2012 S 1,800 D $ 86.76 473,212 D Common Stock 02/10/2012 S 400 D $ 86.765 472,812 D Common Stock 02/10/2012 S 1,000 D $ 86.77 471,812 D Common Stock 02/10/2012 S 9,545 D $ 86.775 462,267 D Common Stock 02/10/2012 S 200 D $ 86.7775 462,067 D Common Stock 02/10/2012 S 3,300 D $ 86.78 458,767 D Common Stock 02/10/2012 S 100 D $ 86.7818 458,667 D Common Stock 02/10/2012 S 6,400 D $ 86.785 452,267 D Common Stock 02/10/2012 S 100 D $ 86.789 452,167 D Common Stock 02/10/2012 S 5,000 D $ 86.79 447,167 D Common Stock 02/10/2012 S 2,300 D $ 86.795 444,867 D Common Stock 02/10/2012 S 100 D $ 86.8 444,767 D Common Stock 02/10/2012 S 300 D $ 86.8018 444,467 D Common Stock 02/10/2012 S 4,391 D $ 86.805 440,076 D Common Stock 02/10/2012 S 400 D $ 86.8075 439,676 D Common Stock 02/10/2012 S 309 D $ 86.81 439,367 D Common Stock 02/10/2012 S 2,000 D $ 86.815 437,367 D Common Stock 02/10/2012 S 200 D $ 86.82 437,167 D Common Stock 02/10/2012 S 2,800 D $ 86.825 434,367 D Common Stock 02/10/2012 S 1,100 D $ 86.83 433,267 D Common Stock 02/10/2012 S 7,700 D $ 86.835 425,567 D Common Stock 02/10/2012 S 400 D $ 86.8375 425,167 D Common Stock 02/10/2012 S 100 D $ 86.839 425,067 D Common Stock 02/10/2012 S 2,600 D $ 86.84 422,467 D Common Stock 02/10/2012 S 7,698 D $ 86.845 414,769 D Common Stock 02/10/2012 S 1,800 D $ 86.85 412,969 D Common Stock 02/10/2012 S 7,232 D $ 86.855 405,737 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Non-qualified Stock Option (Right to Buy) $ 54.11 02/10/2012 M 289,044 02/09/2010 02/08/2019 Common Stock 289,044 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BUCKLEY GEORGE W 3M CENTER ST. PAUL, MN55144-1000 X CHAIRMAN OF THE BOARD & CEO Signatures George Ann Biros, attorney-in-fact for George W. Buckley 02/13/2012 Signature of Reporting Person Date

Explanation of Responses:
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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