FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940 1. Name and Address of Reporting Person * 2. Issuer Name and Ticker or Trading Symbol Ashish Khandpur K 3M CO [ MMM ] (Last) (First) 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director 3. Date of Earliest Transaction (MM/DD/YYYY) (Middle) (Street) 4. If Amendment, Date Original Filed (MM/DD/YYYY) 6. Individual or Joint/Group Filing (Check Applicable Line) ST. PAUL, MN 55144-1000 (City) (State) _____ Other (specify below) Sr. VP, Chief Tech. Officer 8/14/2015 3M CENTER _____ 10% Owner __ X __ Officer (give title below) _ X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code (Instr. 8) Code 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) V Amount (A) or (D) Price 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) Common Stock 10/28/2015 M 309 A $101.49 1061 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 Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivate 2. Security Conversion (Instr. 3) or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed 4. Trans. Execution Code Date, if any (Instr. 8) Code 5. Number of 6. Date Exercisable and Derivative Expiration Date Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) V (A) (D) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) Date Expiration Title Exercisable Date 8. Price of Derivative Security (Instr. 5) Amount or Number of Shares 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) Restricted Stock Units (3) 8/14/2015 J 85 (4) (5) (5) Common Stock 85 (6) 0 I by Spouse Restricted Stock Units (3) 8/14/2015 J 93 (7) (8) (8) Common Stock 93 (6) 0 I by Spouse $101.49 8/14/2015 J 156 (10) 2/5/2014 2/3/2023 Common Stock 156 $0 309 I by Spouse $126.72 8/14/2015 J 313 (10) 2/4/2015 2/2/2024 Common Stock 313 $0 155 I $101.49 10/28/2015 M 309 2/5/2014 2/3/2023 Common Stock 309 $0 0 I $126.72 10/28/2015 M 155 2/4/2015 2/2/2024 Common Stock 155 $0 0 I Non-qualified Stock Option (Right to Buy) (9) Non-qualified Stock Option (Right to Buy) (11) Non-qualified Stock Option (Right to Buy) (9) Non-qualified Stock Option (Right to Buy) (11) by Spouse by Spouse by Spouse 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). Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Ashish Khandpur K 3M CENTER ST. PAUL, MN 55144-1000 Other 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 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). Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. 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