Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	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 * Shafer Stephen M	2. Date of Event Requiring Statement (MM/DD/YYYY) 4/1/2019	3. Issuer Name and Ticker or Trading Symbol 3M CO [MMM]
(Last)        (First)        (Middle) 3M CENTER	4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                            _____ 10% Owner ___ X ___ Officer (give title below)          _____ Other (specify below) Senior VP-Bus Dev-Marketing /
(Street) MAPLEWOOD, MN 55144        (City)              (State)              (Zip)	5. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _ X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	812.2711   (1)	D

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(2)	(2)	Common Stock	1298	(3)	D
Non-qualified Stock Option (Right to Buy)	2/5/2014	2/3/2023	Common Stock	3145	$101.49	D
Non-qualified Stock Option (Right to Buy)	2/4/2015	2/2/2024	Common Stock	2338	$126.72	D
Non-qualified Stock Option (Right to Buy)	2/3/2016	2/3/2025	Common Stock	4090	$165.94	D
Non-qualified Stock Option (Right to Buy)	2/2/2017	2/2/2026	Common Stock	5964	$147.87	D
Non-qualified Stock Option (Right to Buy)	2/6/2018	2/6/2027	Common Stock	12882	$175.76	D
Non-qualified Stock Option (Right to Buy)	2/6/2019	2/4/2028	Common Stock	7279	$233.63	D
Non-qualified Stock Option (Right to Buy)	2/5/2020	2/4/2029	Common Stock	7400	$201.12	D

Explanation of Responses:
(1)	Includes shares acquired under 3M's General Employee Stock Purchase Plan.
(2)	The restricted stock units will vest 100% five years from the grant date of 06/01/2015
(3)	Each restricted stock unit represents a contingent right to receive one share of 3M common stock.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Shafer Stephen M 3M CENTER MAPLEWOOD, MN 55144			Senior VP-Bus Dev-Marketing

Signatures
/s/ Sheila B. Claugherty, attorney-in-fact for Mr. Shafer		4/8/2019
** 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 5(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.
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.