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 ^*

Squires Nelson John III

2. Date of Event Requiring Statement (MM/DD/YYYY) 10/1/2019

3. Issuer Name and Ticker or Trading Symbol

WESCO INTERNATIONAL INC [WCC]

(Last) (First) (Middle)

225 WEST STATION SQUARE DRIVE

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___X___ Officer (give title below) _____ Other (specify below)
SVP & COO /

(Street)

PITTSBURGH, PA 15219

(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	9497	D
Common Stock	2445	I	By Spouse

*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)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Stock Appreciation Rights	⁽¹⁾	2/5/2026	Common Stock	5925	$42.20	D
Stock Appreciation Rights	⁽²⁾	2/16/2026	Common Stock	13631	$42.44	D
Stock Appreciation Rights	⁽³⁾	6/8/2026	Common Stock	800	$61.59	D
Stock Appreciation Rights	⁽⁴⁾	9/13/2026	Common Stock	875	$57.34	D
Stock Appreciation Rights	⁽⁵⁾	2/16/2027	Common Stock	12107	$71.65	D
Restricted Stock Units	⁽⁶⁾	⁽⁶⁾	Common Stock	1395	⁽⁷⁾	D
Stock Appreciation Rights	⁽⁸⁾	2/13/2028	Common Stock	16305	$62.80	D
Restricted Stock Units	⁽⁹⁾	⁽⁹⁾	Common Stock	1911	⁽⁷⁾	D
Stock Appreciation Rights	⁽¹⁰⁾	2/13/2029	Common Stock	10308	$54.64	D
Restricted Stock Units	⁽¹¹⁾	⁽¹¹⁾	Common Stock	3088	⁽⁷⁾	D

Explanation of Responses:
(1)	The Stock Appreciation Right becomes exercisable in three (3) equal, annual installments beginning on February 5, 2017.
(2)	The Stock Appreciation Right becomes exercisable in three (3) equal, annual installments beginning on February 16, 2017.
(3)	The Stock Appreciation Right became exercisable in three (3) equal, annual installments beginning on June 8, 2017.
(4)	The Stock Appreciation Right became exercisable in three (3) equal, annual installments beginning on September 13, 2017.
(5)	The Stock Appreciation Right becomes exercisable in three (3) equal, annual installments beginning on February 16, 2018.
(6)	The Restricted Stock Units will vest on February 16, 2020, three years from the date of grant.
(7)	Each Restricted Stock Unit represents a right to receive one share of Common Stock.
(8)	The Stock Appreciation Right becomes exercisable in three (3) equal, annual installments beginning on February 13, 2019.
(9)	The Restricted Stock Units will vest on February 13, 2021, three years from the date of grant.
(10)	The Stock Appreciation Right becomes exercisable in three (3) equal, annual installments beginning on February 13, 2020.
(11)	The Restricted Stock Units will vest on February 13, 2022, three years from the date of grant.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Squires Nelson John III 225 WEST STATION SQUARE DRIVE PITTSBURGH, PA 15219			SVP & COO