• WESCO average gross margin for 2023 was 21.8%, a 1.87% decline from 2022.
• WESCO average gross margin for 2022 was 21.4%, a 6.89% increase from 2021.
• WESCO average gross margin for 2021 was 20.02%, a 6.21% increase from 2020.

Gross margin can be defined as a company's total sales revenue minus its cost of goods sold, divided by the total sales revenue, expressed as a percentage.