Sec Form 4 Filing - Ashish Khandpur K @ 3M CO - 2015-08-14

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 Ashish Khandpur K 2. Issuer Name and Ticker or Trading Symbol 3M CO [ MMM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Sr. VP, Chief Tech. Officer (Last) (First) (Middle) 3M CENTER 3. Date of Earliest Transaction (MM/DD/YY) 08/14/2015 (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 10/28/2015 M 309 A $ 101.49 1,061 D Common Stock 10/28/2015 S 309 D $ 156.49 752 D Common Stock 10/28/2015 M 155 A $ 126.72 907 D Common Stock 10/28/2015 S 155 D $ 156.49 752 D Common Stock 752 ( 1 ) I by Spouse Common Stock 728 ( 2 ) I Spouse 401k/paesop

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 Restricted Stock Units ( 3 ) 08/14/2015 J 85 ( 4 ) ( 5 ) ( 5 ) Common Stock 85 ( 6 ) 0 I by Spouse Restricted Stock Units ( 3 ) 08/14/2015 J 93 ( 7 ) ( 8 ) ( 8 ) Common Stock 93 ( 6 ) 0 I by Spouse Non-qualified Stock Option (Right to Buy) ( 9 ) $ 101.49 08/14/2015 J 156 ( 10 ) 02/05/2014 02/03/2023 Common Stock 156 $ 0 309 I by Spouse Non-qualified Stock Option (Right to Buy) ( 11 ) $ 126.72 08/14/2015 J 313 ( 10 ) 02/04/2015 02/02/2024 Common Stock 313 $ 0 155 I by Spouse Non-qualified Stock Option (Right to Buy) ( 9 ) $ 101.49 10/28/2015 M 309 02/05/2014 02/03/2023 Common Stock 309 $ 0 0 I by Spouse Non-qualified Stock Option (Right to Buy) ( 11 ) $ 126.72 10/28/2015 M 155 02/04/2015 02/02/2024 Common Stock 155 $ 0 0 I by Spouse

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Ashish Khandpur K 3M CENTER ST. PAUL, MN55144-1000 Sr. VP, Chief Tech. Officer Signatures /s/ Sheila B. Claugherty, attorney-in-fact for Ashish K. Khanpur 10/29/2015 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan. ( 2 )Includes shares acquired pursuant to the 3M Voluntary Investment Plan. ( 3 )Each restricted stock unit represents a contingent right to receive one share of 3M common stock. ( 4 )On August 14, 2015, the Issuer cancelled the option of 85 shares of 3M Common Stock granted to the reporting person on 2/4/2014, due to termination of service. ( 5 )The restricted stock units will vest on 2/4/2017. ( 6 )Each restricted stock unit represents a contingent right to receive one share of 3M common stock. ( 7 )On August 14, 2015, the Issuer cancelled the option of 93 shares of 3M Common Stock granted to the reporting person on 2/5/2013, due to termination of service. ( 8 )The restricted stock units will vest on 2/5/2016. ( 9 )This option becomes exercisable in equal installments on each of the first three anniversaries of the grant date (2/5/2013). ( 10 )On August 14, 2015, due to termination of service, the unvested portion of the option could not be exercised. ( 11 )This option becomes exercisable in equal installments on each of the first three anniversaries of the grant date (2/4/2014).

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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