WESCO officer Matthew S. Kulasa acquires dividend rights

The dividend equivalents are linked to restricted stock units and vest on the same schedule as the underlying award.

Rhea-AI Filing Summary

WESCO International Inc. SVP, Corp. Controller & CAO Matthew S. Kulasa acquired 1.1601 dividend equivalent rights on September 30, 2026. The rights accrued on restricted stock units in connection with the company’s quarterly dividend; each is the economic equivalent of one common share and vests on the same schedule as the underlying award. His reported direct common-stock holdings after the transaction were 3,148.4464 shares.

Insider Trade Summary

Grant/Award: 1.1601 shares

Grant/Award 1 txn

Insider Kulasa Matthew S

Role SVP, Corp. Controller & CAO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	1.1601	$0.00	$0.00

Holdings After Transaction: Common Stock — 3,148.4464 shares (Direct)

Footnotes (1)

1. F1. Represents dividend equivalent rights ("DERs") in connection with the Issuer's quarterly dividend and accrued to the Reporting Person on restricted stock units ("RSUs") held by the Reporting Person. Each DER is the economic equivalent of one share of Issuer's common stock and vests on the same schedule as the underlying award.

Key Figures

Dividend equivalent rights acquired: 1.1601 rights Reported direct common-stock holdings after transaction: 3,148.4464 shares Common-share equivalent per dividend equivalent right: 1 share

3 metrics

Dividend equivalent rights acquired 1.1601 rights September 30, 2026

Reported direct common-stock holdings after transaction 3,148.4464 shares Following the September 30, 2026 transaction

Common-share equivalent per dividend equivalent right 1 share Each dividend equivalent right

Key Terms

dividend equivalent rights (DERs), restricted stock units (RSUs), economic equivalent

3 terms

dividend equivalent rights (DERs) financial

"Represents dividend equivalent rights ("DERs")"

restricted stock units (RSUs) financial

"accrued to the Reporting Person on restricted stock units ("RSUs")"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

economic equivalent financial

"Each DER is the economic equivalent of one share"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many dividend equivalent rights did WCC officer Matthew S. Kulasa acquire?

Matthew S. Kulasa, WESCO International Inc.’s SVP, Corp. Controller & CAO, acquired 1.1601 dividend equivalent rights on September 30, 2026. Each right is the economic equivalent of one common share, accrued on restricted stock units in connection with the quarterly dividend, and vests on the underlying award’s schedule.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/02/2026 - 04:33 PM Accepted by SEC EDGAR 10/02/2026 - 04:33 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Kulasa Matthew S

(Last) (First) (Middle)

225 W STATION SQUARE DRIVE

SUITE 700

(Street)

PITTSBURGH PENNSYLVANIA 15219

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Corp. Controller & CAO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/30/2026		A		1.1601(1)	A	$0	3,148.4464	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents dividend equivalent rights ("DERs") in connection with the Issuer's quarterly dividend and accrued to the Reporting Person on restricted stock units ("RSUs") held by the Reporting Person. Each DER is the economic equivalent of one share of Issuer's common stock and vests on the same schedule as the underlying award.

	/s/ Michele Nelson, as Attorney-in-Fact	10/02/2026
	** 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 4 (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.
* Form 4: SEC 1474 (03-26)