WESCO (WCC) EVP Diane Lazzaris gets RSUs, options and tax share withholding

Rhea-AI Filing Summary

WESCO International executive Diane Lazzaris reported equity compensation and related tax withholding transactions. On March 2, 2026, she received a grant of 2,820 stock options with an exercise schedule in three equal annual installments starting on the first anniversary of the grant date. She also received a grant of 1,183 restricted stock units (RSUs), each representing one share of common stock, which vest in three equal installments beginning on the first anniversary of the grant date. On March 1, 2026, 532.261 shares of common stock were disposed of at $289.50 per share to cover tax withholding on RSUs that vested from awards granted on March 1, 2024 and March 1, 2025. After these transactions, she directly owned 28,332.5645 common shares and 2,820 stock options.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Lazzaris Diane

Role EVP and General Counsel

Type	Security	Shares	Price	Value
Grant/Award	Stock Options (Right to Buy)	2,820	$0.00	--
Grant/Award	Common Stock	1,183	$0.00	--
Tax Withholding	Common Stock	532.261	$289.50	$154K

Holdings After Transaction: Stock Options (Right to Buy) — 2,820 shares (Direct); Common Stock — 29,515.565 shares (Direct)

Footnotes (1)

1. Represents tax withholding on the vesting of restricted stock units ("RSU") that were granted on 03/01/2024 and 03/01/2025. 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. The stock options become exercisable in three equal annual installments beginning on the first anniversary of the date of grant.

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^*

Lazzaris Diane

(Last) (First) (Middle)

225 WEST STATION SQUARE DRIVE

SUITE 700

(Street)

PITTSBURGH PA 15219

(City) (State) (Zip)

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)
	EVP and General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

4. 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 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	03/01/2026		F		532.261(1)	D	$289.5	28,332.5645	D
Common Stock	03/02/2026		A		1,183(2)	A	$0	29,515.5645	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
Stock Options (Right to Buy)	$295.84	03/02/2026		A		2,820		(3)	03/02/2036	Common Stock	2,820	$0	2,820	D

Explanation of Responses:

1. Represents tax withholding on the vesting of restricted stock units ("RSU") that were granted on 03/01/2024 and 03/01/2025.

2. 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.

3. The stock options become exercisable in three equal annual installments beginning on the first anniversary of the date of grant.

	/s/ Michele Nelson, as Attorney-in-Fact	03/03/2026
	** 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.

FAQ

What equity awards did Diane Lazzaris receive from WESCO (WCC) on March 2, 2026?

On March 2, 2026, Diane Lazzaris received 2,820 stock options and 1,183 restricted stock units (RSUs). The RSUs and options each vest in three equal annual installments starting on the first anniversary of the grant date.

How do the new RSUs granted to WESCO (WCC) EVP Diane Lazzaris vest?

The 1,183 RSUs granted to Diane Lazzaris vest in three equal installments. Vesting begins on the first anniversary of the grant date, with additional installments on the second and third anniversaries, each RSU representing one share of common stock.

What is the vesting schedule for Diane Lazzaris’s new WESCO (WCC) stock options?

The 2,820 stock options awarded to Diane Lazzaris become exercisable in three equal annual installments. The first installment becomes exercisable on the first anniversary of the grant date, followed by additional annual installments in subsequent years.

Why did Diane Lazzaris dispose of WESCO (WCC) shares on March 1, 2026?

On March 1, 2026, 532.261 shares of WESCO common stock were withheld at $289.50 per share. This disposition covered tax withholding arising from the vesting of RSUs granted on March 1, 2024 and March 1, 2025.

How many WESCO (WCC) shares does Diane Lazzaris directly own after these Form 4 transactions?

Following the reported transactions, Diane Lazzaris directly owns 28,332.5645 shares of WESCO common stock. She also holds 2,820 stock options as a result of the new option grant reported on March 2, 2026.

Are the WESCO (WCC) transactions by Diane Lazzaris open-market buys or sells?

The reported transactions are equity grants and tax withholding, not open-market trades. She received stock options and RSUs as compensation, while shares were disposed of solely to satisfy tax obligations on previously granted RSUs.