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 *   Minicozzi Robert 2. Date of Event Requiring Statement (Month/Day/Year) 12/07/2017 3. Issuer Name and Ticker or Trading Symbol WESCO INTERNATIONAL INC [WCC] (Last) (First) (Middle) 225 WEST STATION SQUARE DRIVE, SUITE 700 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) CIO & VP, IT 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) PITTSBURGH, PA 15219-1122 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 8,000 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	3,534	$ (2)	D	Â
Stock Appreciation Rights	  (3)	02/16/2026	Common Stock	8,761	$ 42.44	D	Â
Restricted Stock Units	  (1)	  (1)	Common Stock	1,059	$ (2)	D	Â
Stock Appreciation Rights	  (4)	02/14/2027	Common Stock	4,535	$ 71.65	D	Â
Restricted Stock Units	  (5)	  (5)	Common Stock	838	$ (2)	D	Â
Stock Appreciation Rights	  (6)	02/16/2027	Common Stock	7,262	$ 71.65	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Minicozzi Robert 225 WEST STATION SQUARE DRIVE SUITE 700 PITTSBURGH, PA 15219-1122	Â	Â	  CIO & VP, IT	Â

Signatures

/s/ Samantha L. O'Donoghue, Attorney-In-Fact		12/14/2017
**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)	The Restricted Stock Units will vest on February 16, 2019, three years from the date of the grant.
(2)	Each Restricted Stock Unit represents a right to receive one share of Common Stock.
(3)	The Stock Appreciation Rights become exercisabe in three (3) equal, annual installments beginning on February 16, 2017, the first anniversary of the date of grant.
(4)	The Stock Appreciation Rights become exercisable in three (3) equal annual installments beginning on February 14, 2018, the first anniversary of the date of grant.
(5)	The Restricted Stock Units will vest on February 16, 2020, three years from the date of grant.
(6)	The Stock Appreciation Rights become exercisable in three (3) equal annual installments beginning on February 16, 2018, the first anniversary of the date of grant.

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