Ownership Submission
FORM 5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Form 3 Holdings Reported
Form 4 Transactions Reported
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

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. Statement for Issuer's Fiscal Year Ended (Month/Day/Year)
12/31/2009
(Street)


ST. PAUL, MN 55144-1000		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Reporting
(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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned at end of Issuer's Fiscal Year
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Amount (A) or (D) Price
Common Stock 12/31/2009   J(1) 219,889 D $ (2) 42,832 D  
Common Stock             592 (3) I By 401k/paesop Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 2270 (9-02)

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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)		 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 at End of Issuer's Fiscal Year
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
(A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units   12/31/2009   J(1) 132,808     (4)   (4) Common Stock
132,808
(2) 132,808
D
 
Restricted Stock Units   12/31/2009   J(1) 10,755     (5)   (5) Common Stock
10,755
(2) 10,755
D
 
Restricted Stock Units   12/31/2009   J(1) 72,261     (6)   (6) Common Stock
72,261
(2) 72,261
D
 
Restricted Stock Units   12/31/2009   J(1) 4,065     (7)   (7) Common Stock
4,065
(2) 4,065
D
 

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
BUCKLEY GEORGE W
3M CENTER
ST. PAUL, MN 55144-1000		   X     CHAIRMAN OF THE BOARD & CEO  

Signatures

George Ann Biros, attorney-in-fact for George W. Buckley 01/15/2010
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Due to reporting automation changes instituted by Issuer's stock plan vendor, the reporting person's restricted stock units will be reported on Table II going forward. This transaction indicates the number of restricted stock units that will be transferred to Table II.
(2) Each restricted stock unit represents a contingent right to receive one share of 3M common stock.
(3) Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan.
(4) The terms of the initial award (157,808 restricted stock units) provided for vesting as follows: 25,000 restricted stock units on 12/31/2006 and 132,808 on 12/6/2010.
(5) The terms of the initial award (50,000 restricted stock units) provided for vesting in five equal annual installments on the anniversary of the grant date, 12/6/2005.
(6) The restricted stock units will vest 100% three years from the grant date (2/9/2009).
(7) The terms of the initial award (5,420 restricted stock units) provided for vesting in four equal installments commencing 12/31/2009.

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