[Form 4] WESCO INTERNATIONAL INC Insider Trading Activity

Rhea-AI Filing Summary

WESCO International senior vice president and chief accounting officer Matthew S. Kulasa executed an open-market sale of 1,030 shares of common stock on May 5, 2026 at an average price of $351.86 per share. After this transaction, he directly holds 3,146.0803 shares.

Insider Trade Summary

Net Seller: 1,030 shares ($362,416)

Net Sell 1 txn

Insider Kulasa Matthew S

Role SVP, Corp. Controller & CAO

Sold 1,030 shs ($362K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,030	$351.86	$362K

Holdings After Transaction: Common Stock — 3,146.08 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 1,030 shares Sale price per share: $351.86 per share Shares held after sale: 3,146.0803 shares +1 more

4 metrics

Shares sold 1,030 shares Open-market sale of WESCO common stock on May 5, 2026

Sale price per share $351.86 per share Average price for the 1,030 shares sold

Shares held after sale 3,146.0803 shares Direct ownership of WESCO common stock post-transaction

Transaction code Code S Sale in open market or private transaction for non-derivative securities

Key Terms

open-market sale, Common Stock, transaction code "S"

3 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

transaction code "S" regulatory

"transaction_code_description: "Sale in open market or private transaction""

Form 4 Insider Transactions: What Each Field Means →

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)
05/05/2026

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	05/05/2026		S		1,030	D	$351.86	3,146.0803	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:

	/s/ Michele Nelson, as Attorney-in-Fact	05/07/2026
	** 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)

FAQ

What did WESCO (WCC) executive Matthew S. Kulasa do in this Form 4 filing?

Matthew S. Kulasa, a senior vice president and chief accounting officer at WESCO, reported an open-market sale of 1,030 shares of common stock. The transaction was recorded as a standard sale under SEC code "S" for non-derivative securities.

How many WESCO (WCC) shares did Matthew S. Kulasa sell and at what price?

He sold 1,030 shares of WESCO common stock at an average price of $351.86 per share. This was reported as an open-market or private transaction, classified as a non-derivative sale under SEC transaction code "S".

How many WESCO (WCC) shares does Matthew S. Kulasa own after the reported sale?

Following the reported transaction, Matthew S. Kulasa directly owns 3,146.0803 shares of WESCO common stock. This post-transaction balance reflects his remaining direct holdings after selling 1,030 shares in the open market on May 5, 2026.

Was the WESCO (WCC) insider transaction a buy or a sell?

The insider transaction was a sale. The Form 4 identifies it as an open-market sale with transaction code "S" and explicitly labels the transaction direction as "sell," indicating a disposition rather than an acquisition of WESCO common stock.

What type of security did Matthew S. Kulasa trade in this WESCO (WCC) filing?

He traded WESCO’s common stock as a non-derivative security. The Form 4 lists the security title as "Common Stock" and classifies the transaction as a straightforward open-market sale, with no options, warrants, or other derivative instruments involved.