Daniel J. Castillo - 11 Sep 2025 Form 4 Insider Report for WESCO INTERNATIONAL INC (WCC)

Role: EVP & GM, EES
Signature: /s/ Michele Nelson, as Attorney-in-Fact
Issuer symbol: WCC
Transactions as of: 11 Sep 2025
Net transactions value: $0
Form type: 4
Filing time: 11 Sep 2025, 18:03:11 UTC
Previous filing: 09 Sep 2025
Next filing: 02 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Castillo Daniel J	EVP & GM, EES	225 WEST STATION SQUARE DRIVE, SUITE 700, PITTSBURGH	/s/ Michele Nelson, as Attorney-in-Fact	11 Sep 2025	0001535412

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WCC	Common Stock	Award	$0	+12,245		$0.000000	12,245	11 Sep 2025	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Represents a grant of restricted stock units ("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.