Laura K. Thompson - 01 Mar 2026 Form 4 Insider Report for WESCO INTERNATIONAL INC (WCC)

Role: Director
Signature: /s/ Michele Nelson, as Attorney-in-Fact
Issuer symbol: WCC
Transactions as of: 01 Mar 2026
Net transactions value: -$1,921
Form type: 4
Filing time: 03 Mar 2026, 20:20:14 UTC
Previous filing: 05 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Thompson Laura K	Director	225 WEST STATION SQUARE DRIVE, SUITE 700, PITTSBURGH	/s/ Michele Nelson, as Attorney-in-Fact	03 Mar 2026	0001589405

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WCC	Common Stock	Tax liability	$1,921	-7	-0.06%	$289.50	10,325	01 Mar 2026	Direct	F1
transaction	WCC	Common Stock	Award	$0	+659	+6.4%	$0.000000	10,984	02 Mar 2026	Direct	F2

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

Explanation of Responses:

Id	Content
F1	Represents tax withholding on the vesting of restricted stock units ("RSU") that were granted on 03/01/2025.
F2	Represents a grant of RSUs. Each RSU represents a contingent right to acquire one share of Issuer's common stock. The RSUs vest in full on the first anniversary of the date of grant.