FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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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(Print or Type Responses)

1. Name and Address of Reporting Person *   Ferland Martine 2. Date of Event Requiring Statement (Month/Day/Year) 03/01/2019 3. Issuer Name and Ticker or Trading Symbol MARSH & MCLENNAN COMPANIES, INC. [MMC] (Last) (First) (Middle) 1166 AVENUE OF THE AMERICAS 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO, Mercer 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) NEW YORK, NY 10036 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 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 2,763 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		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	  (1)	  (1)	Common Stock	8,798	$ (2)	D	Â
Stock Options (Right to Buy)	  (3)	02/21/2026	Common Stock	9,192	$ 57.325	D	Â
Stock Options (Right to Buy)	  (4)	02/21/2027	Common Stock	7,912	$ 73.195	D	Â
Stock Options (Right to Buy)	  (5)	02/20/2028	Common Stock	7,518	$ 83.046	D	Â
Stock Options (Right to Buy)	  (6)	02/18/2029	Common Stock	56,085	$ 90.785	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Ferland Martine 1166 AVENUE OF THE AMERICAS NEW YORK, NY 10036	Â	Â	  President and CEO, Mercer	Â

Signatures

/s/ Tiffany D. Wooley, Attorney-in-Fact		03/05/2019
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Not Applicable.
(2)	This security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.
(3)	These options were granted on February 22, 2016 and vest in four equal annual installments. The first three installments vested and became exercisable on February 22nd of 2017, 2018 and 2019. The remaining installment vests on February 22nd of 2020.
(4)	These options were granted on February 22, 2017 and vest in four equal annual installments. The first two installments vested and became exercisable on February 22nd of 2018 and 2019. The remaining installments vest on February 22nd of 2020 and 2021.
(5)	These options were granted on February 21, 2018 and vest in four equal annual installments. The first installment vested and became exercisable on February 21, 2019. The remaining installments vest on February 21st of 2020, 2021 and 2022.
(6)	These options were granted on February 19, 2019 and vest in four equal annual installments on February 19th of 2020, 2021, 2022 and 2023.

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