David S. Schulz - 04 Mar 2026 Form 4 Insider Report for WESCO INTERNATIONAL INC (WCC)

Role: EVP & Former CFO
Signature: /s/ Michele Nelson, as Attorney-in-Fact
Issuer symbol: WCC
Transactions as of: 04 Mar 2026
Net transactions value: -$4,370,809
Form type: 4
Filing time: 06 Mar 2026, 16:22:58 UTC
Previous filing: 03 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Schulz David S.	EVP & Former CFO	225 WEST STATION SQUARE DRIVE, SUITE 700, PITTSBURGH	/s/ Michele Nelson, as Attorney-in-Fact	06 Mar 2026	0001592539

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WCC	Common Stock	Options Exercise		+22,144	+20%	$54.64^*	131,127	04 Mar 2026	Direct
transaction	WCC	Common Stock	Disposed to Issuer		-4,223	-3.2%	$286.58^*	126,904	04 Mar 2026	Direct
transaction	WCC	Common Stock	Tax liability		-7,794	-6.1%	$286.58^*	119,110	04 Mar 2026	Direct
transaction	WCC	Common Stock	Options Exercise		+12,859	+11%	$76.80^*	131,969	04 Mar 2026	Direct
transaction	WCC	Common Stock	Disposed to Issuer		-3,447	-2.6%	$286.58^*	128,522	04 Mar 2026	Direct
transaction	WCC	Common Stock	Tax liability		-4,093	-3.2%	$286.58^*	124,429	04 Mar 2026	Direct
transaction	WCC	Common Stock	Sale	$4,014,067	-14,190	-11%	$282.88	110,239	05 Mar 2026	Direct	F1
transaction	WCC	Common Stock	Sale	$356,742	-1,256	-1.1%	$284.03	108,983	05 Mar 2026	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	WCC	Stock Appreciation Rights	Options Exercise		-22,144	-100%	$0.000000^*	0	04 Mar 2026	Common Stock	22,144	$54.64	Direct	F3
transaction	WCC	Stock Appreciation Rights	Options Exercise		-12,859	-100%	$0.000000^*	0	04 Mar 2026	Common Stock	12,859	$76.80	Direct	F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents weighted average sale price. These shares were sold in multiple transactions at prices ranging from $282.54 to $283.53. Upon request by the SEC, the Issuer or a stockholder of the Issuer, complete information regarding the number of shares sold at each price within the range will be provided.
F2	Represents weighted average sale price. These shares were sold in multiple transactions at prices ranging from $283.54 to $284.49. Upon request by the SEC, the Issuer or a stockholder of the Issuer, complete information regarding the number of shares sold at each price within the range will be provided.
F3	The Stock Appreciation Rights became exercisable in three (3) equal, annual installments beginning on the first anniversary of the February 13, 2019 grant date.
F4	The Stock Appreciation Rights became exercisable in three (3) equal, annual installments beginning on the first anniversary of the February 11, 2021 grant date.