[Form 3] Wesco International Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Initial Form 3 filed for Daniel J. Castillo at Wesco International, Inc. (WCC). The filing lists Mr. Castillo's address in Pittsburgh and his role as EVP & GM, EES. The statement of beneficial ownership reports No securities are beneficially owned by the reporting person as of 09/01/2025. The form is signed on 09/09/2025.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Castillo Daniel J

(Last) (First) (Middle)

225 WEST STATION SQUARE DRIVE

SUITE 700

(Street)

PITTSBURGH PA 15219-1122

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/01/2025

3. Issuer Name and Ticker or Trading Symbol
WESCO INTERNATIONAL INC [ WCC ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & GM, EES

5. If Amendment, Date of Original Filed (Month/Day/Year)

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)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/s/ Michele Nelson	09/09/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What does Wesco International's (WCC) Form 3 filed by Daniel J. Castillo show?

The Form 3 reports that Daniel J. Castillo, listed as EVP & GM, EES, beneficially owns no securities in Wesco as of 09/01/2025.

When was the Form 3 event date and signature date for the WCC filing?

The event date is 09/01/2025 and the filing is signed on 09/09/2025.

Does the Form 3 indicate any derivative or non-derivative holdings for Daniel J. Castillo?

No. The filing explicitly states: No securities are beneficially owned, and lists no derivative or non-derivative holdings.

What is the reporting person’s listed role and address on the Form 3 for WCC?

The filing lists the reporting person as EVP & GM, EES with an address at 225 West Station Square Drive, Suite 700, Pittsburgh, PA 15219-1122.

Is this Form 3 a joint filing or individual filing for WCC?

The form indicates it is filed by one reporting person (individual filing).