SQUIRES NELSON JOHN III (SVP & COO) sold 22.1% of their position (13.78K shares) of WESCO INTERNATIONAL INC on the open market

Open‑market sale worth $3.03M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

SQUIRES NELSON JOHN III

Filed: 9/11/2025ACC: 0000950170-25-114251

InsiderSQUIRES NELSON JOHN IIICIK 1790020

→

IssuerWESCO INTERNATIONAL INCCIK 929008

Officer· SVP & COO

Since Oct 2019

-31.95K

Net shares

Net seller

$6.89M

Total sold

Open market trades

0B · 1S

Total transactions

31.95K acquired · 63.91K disposed

Non-Derivative Transactions7

Common Stock

Direct

M · Option Exercise

+21.64K

Price / share

$48.32

Trade value

$1.05M

% of position

44.5%

9/9/2025

48.62K→70.27K

Common Stock

Direct

D · Disposition

−4.92K

Price / share

$212.64

Trade value

$1.05M

% of position

7.0%

9/9/2025

70.27K→65.35K

Common Stock

Direct

F · Tax Withholding

−7.27K

Price / share

$212.64

Trade value

$1.55M

% of position

11.1%

9/9/2025

65.35K→58.08K

Common Stock

Direct

M · Option Exercise

+10.31K

Price / share

$54.64

Trade value

$563.23K

% of position

17.7%

9/9/2025

58.08K→68.38K

Common Stock

Direct

D · Disposition

−2.65K

Price / share

$212.64

Trade value

$563.28K

% of position

3.9%

9/9/2025

68.38K→65.74K

Common Stock

Direct

F · Tax Withholding

−3.33K

Price / share

$212.64

Trade value

$708.30K

% of position

5.1%

9/9/2025

65.74K→62.40K

Common Stock

Direct

S · Sale

−13.78K

Price / share

$219.59

Trade value

$3.03M

% of position

22.1%

9/11/2025

62.40K→48.62K

Total

Net shares

+0.00

Net value

-$5.28M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	9/9/2025	M · Option Exercise	+21.64K	$48.32	$1.05M	44.5%	48.62K	70.27K
Common Stock Direct	9/9/2025	D · Disposition	−4.92K	$212.64	$1.05M	7.0%	70.27K	65.35K
Common Stock Direct	9/9/2025	F · Tax Withholding	−7.27K	$212.64	$1.55M	11.1%	65.35K	58.08K
Common Stock Direct	9/9/2025	M · Option Exercise	+10.31K	$54.64	$563.23K	17.7%	58.08K	68.38K
Common Stock Direct	9/9/2025	D · Disposition	−2.65K	$212.64	$563.28K	3.9%	68.38K	65.74K
Common Stock Direct	9/9/2025	F · Tax Withholding	−3.33K	$212.64	$708.30K	5.1%	65.74K	62.40K
Common Stock Direct	9/11/2025	S · Sale	−13.78K	$219.59	$3.03M	22.1%	62.40K	48.62K
Total			+0.00		-$5.28M

Derivative Transactions2

Stock Appreciation Rights

Direct

M · Option Exercise

Converts to

Common Stock

21.64K shares

−21.64K

Strike price

48.32

Held after

0.00

Exercisable

—

9/9/2025

Stock Appreciation Rights

Direct

M · Option Exercise

Converts to

Common Stock

10.31K shares

−10.31K

Strike price

54.64

Held after

0.00

Exercisable

—

9/9/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Appreciation Rights Direct	Common Stock21.64K shares	9/9/2025	M · Option Exercise	−21.64K	48.32	—	0.00
Stock Appreciation Rights Direct	Common Stock10.31K shares	9/9/2025	M · Option Exercise	−10.31K	54.64	—	0.00