JOHN ENGEL - 01 Mar 2026 Form 4 Insider Report for WESCO INTERNATIONAL INC (WCC)

Role: Chairman, President & CEO
Signature: /s/ Michele Nelson, as Attorney-in-Fact
Issuer symbol: WCC
Transactions as of: 01 Mar 2026
Net transactions value: -$1,054,368
Form type: 4
Filing time: 03 Mar 2026, 19:57:05 UTC
Previous filing: 18 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
ENGEL JOHN	Chairman, President & CEO	225 WEST STATION SQUARE DRIVE, SUITE 700, PITTSBURGH	/s/ Michele Nelson, as Attorney-in-Fact	03 Mar 2026	0001278669

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WCC	Common Stock	Tax liability	$1,054,368	-3,642	-0.77%	$289.50	470,456	01 Mar 2026	Direct	F1
transaction	WCC	Common Stock	Award	$0	+8,451	+1.8%	$0.000000	478,907	02 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 Options (Right to Buy)	Award	$0	+20,143		$0.000000	20,143	02 Mar 2026	Common Stock	20,143	$295.84	Direct	F3

* 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 03/01/2024 and 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 three equal installments beginning on the first anniversary of the date of grant.
F3	The stock options become exercisable in three equal annual installments beginning on the first anniversary of the date of grant.