Company: WCC
Filing Date: 2025-03-27
Form Type: PRE 14A
Source: 0001193125-25-065641
Chunk: 24

Company: WESCO INTERNATIONAL INC
Filing Date: 2025-03-27
Form: PRE 14A
Chunk 24
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 27, 2025, by each person or group known by the Company to beneficially own five percent or more of the outstanding shares of the Company’s Common Stock.

| Name                                                                        |     | Shares       
 Beneficially 
 Owned        |           |    |     | Percent      
 Owned        
 Beneficially |      |
| The Vanguard Group 100 Vanguard Blvd. Malvern, PA 19355                     |     |              | 4,819,559 | -1 |     |              | 9.9% |
| BlackRock, Inc. 50 Hudson Yards New York, NY 10001                          |     |              | 3,993,934 | -2 |     |              | 8.2% |
| SteelMill Master Fund, LP 9 West 57th Street, 37th Floor New York, NY 10019 |     |              | 2,474,092 | -3 |     |              | 6.1% |

| (1) | This information is based solely upon a Schedule 13G filed by The Vanguard Group (“Vanguard”) with the SEC on February 13, 2024. Vanguard is the beneficial owner of 4,819,559 shares and has shared voting power over 16,514 shares, sole dispositive power over 4,754,417 shares and shared dispositive power over 65,142 shares. |

| (2) | This information is based solely upon a Schedule 13G filed by BlackRock, Inc. (“BlackRock”) with the SEC on January 26, 2024. BlackRock is the beneficial owner of 3,993,934 shares and has sole power to vote 3,768,277 shares, and sole dispositive power over 3,993,934 shares. |

| (3) | This information is based solely upon a Schedule 13G filed by SteelMill Master Fund LP and affiliates (“SteelMill”) with the SEC on November 14, 2024. SteelMill is the beneficial owner of 2,987,986 shares and has shared voting and shared dispositive power over all of the shares beneficially owned. |

#### Wesco2025 Proxy StatementTransactions with Related Persons29Transactions With Related PersonsOur Company has a written policy and has implemented processes and controls in order to obtain information from our Directors and executive officers with respect to related person transactions and for then determining whether our Company or a related person has a direct or indirect material interest in the transaction