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John Engel, Chairman, President & CEO of Wesco International Inc. (WCC), reported multiple transactions on 08/26/2025 and 08/27/2025. He exercised 125,001 stock appreciation rights with a conversion/exercise price of $62.80, resulting in 125,001 shares issued. On the same dates he sold a total of 125,001 shares in multiple transactions at weighted average prices ranging from $224.30 to $227.62, with reported weighted prices of $225.01, $225.74, $226.88 and $227.47 for specific sale groups. Following these transactions his beneficial ownership is reported as 475,971.1888 shares.

Wesco International insider activity: Diane Lazzaris, EVP and General Counsel, reported multiple open-market sales and one acquisition tied to stock appreciation rights (SARs) in late August 2025. The filing shows staged sales on August 26-28, 2025 totaling 10,700 shares sold at weighted-average prices in the $225.40�$227.85 range, and an acquisition on August 27, 2025 of 9,927 shares resulting from SARs exercisable into common stock at an exercise price of $54.64. Following these transactions, Lazzaris beneficially owned 52,915.5723 shares, down from a reported high of 62,842.5723 after the SAR exercise. The filing is signed by an attorney-in-fact on behalf of the reporting person.

Wesco International Inc. (WCC) reporting person David S. Schulz, EVP & CFO, reported multiple transactions on 08/26/2025�08/27/2025. He exercised 27,507 Stock Appreciation Rights at an exercise price of $48.32, resulting in acquisition of 27,507 common shares. Following that acquisition his reported beneficial ownership rose to 137,883.2917 shares. On 08/26�08/27/2025 he disposed of a series of common shares in several transactions: 5,869 shares, 9,411 shares, 9,389 shares, 2,738 shares and 100 shares at weighted average sale prices in the $224.38�$226.63 range, reducing his reported holdings to 110,376.2917 shares.

James L. Singleton, a director of Wesco International Inc. (WCC), reported two open-market sales of company common stock on 08/26/2025. The Form 4 shows a sale of 752 shares at a weighted-average price of $226 (range $225.70�$226.44) and a sale of 748 shares at a weighted-average price of $227.09 (range $226.83�$227.70). After the first sale the reporting person beneficially owned 39,624.5721 shares; after the second sale the beneficial ownership is reported as 38,876.5721 shares. The filing was signed by an attorney-in-fact on 08/28/2025. The form indicates the reporter is a director and the transactions were direct holdings.

Wesco International (WCC) filed a Form 144 reporting a proposed sale of 4,260 common shares through UBS Financial Services on the NYSE, with an aggregate market value of $966,040. The filing indicates the shares were acquired on 08/27/2025 via a SAR exercise from the issuer and the intended sale date is 08/28/2025. The filer previously sold 3,160 shares on 08/26/2025 for gross proceeds of $714,995. The notice includes the filers representation that they are unaware of any undisclosed material adverse information about the issuer.

Wesco International Inc. insider Christine Wolf notified the SEC of a proposed sale under Rule 144 of 2,098 common shares via UBS Financial Services with an aggregate market value of $471,881, with an approximate sale date of 08/27/2025. The shares were acquired by a SAR exercise on 08/26/2025 and payment was recorded on 08/27/2025. The filing also discloses that Christine Wolf sold 3,106 shares on 06/18/2025 for gross proceeds of $550,217; the notice includes the standard representation that the seller is not aware of undisclosed material adverse information.

Form 144 notice for Wesco International, Inc. (WCC) discloses a proposed sale of 12,227 common shares carried by UBS Financial Services on the New York Stock Exchange with an aggregate market value of $2,753,179. The shares were acquired on 08/26/2025 through a stock appreciation right (SAR) exercise from the issuer and are scheduled for sale on 08/27/2025. The filer certifies they are unaware of undisclosed material adverse information about the issuer. No sales by the same person in the prior three months are reported.

Wesco International (WCC) filed a Form 144 indicating a proposed sale of 51,051 common shares through UBS Financial Services on the NYSE, with an aggregate market value of $11,506,895. The shares were acquired the prior day via a stock appreciation right (SAR) exercise and are listed for sale with an approximate sale date of 08/27/2025. The filing shows 48,662,715 shares outstanding, so the proposed sale represents about 0.105% of outstanding shares.

The filer states there were no securities sold in the past three months and includes the standard certification that no undisclosed material adverse information is known. No other financial results, forward-looking statements, or additional transaction terms are provided in the notice.

Wesco International (WCC) filed a Form 144 reporting a proposed sale of 1,500 shares of common stock through UBS Financial Services on the NYSE, with an aggregate market value of $339,816 and an approximate sale date of 08/26/2025. The shares were acquired as restricted stock units (RSUs): 76 shares issued 02/13/2021 and 1,424 shares issued 02/17/2023. The filer reports no securities sold in the past three months and affirms no undisclosed material adverse information.