Business Description

In this Annual Report on Form 10-K, “Wesco” refers to WESCO International, Inc., and its subsidiaries and its predecessors unless the context otherwise requires. References to “we,” “us,” “our” and the “Company” refer to Wesco and its subsidiaries. The Company WESCO International, Inc. (“Wesco International”) and its subsidiaries (collectively, “Wesco” or the “Company”), headquartered in Pittsburgh, Pennsylvania, is a leading provider of business-to-business distribution, logistics services and supply chain solutions. We employ approximately 21,000 people, maintain relationships with more than 35,000 suppliers, and serve nearly 130,000 customers worldwide. With millions of products, end-to-end supply chain services and significant digital capabilities, Wesco provides innovative solutions to meet customer needs across commercial and industrial businesses, technology companies, telecommunications providers, and utilities. Our innovative solutions include supply chain management, logistics and transportation, procurement, warehousing and inventory management, as well as kitting and labeling, limited assembly of products and installation enhancement. Wesco operates more than 700 sites, including distribution centers, fulfillment centers and sales offices in approximately 50 countries, providing a local presence for customers and a global network to serve multi-location businesses and global corporations. Business Segments and Industry Overview Wesco has operating segments comprising three strategic business units consisting of Electrical & Electronic Solutions (“EES”), Communications & Security Solutions (“CSS”) and Utility & Broadband Solutions (“UBS”). The following is a description of each of our business segments and the industries in which they operate. Electrical & Electronic Solutions The EES segment, serving customers in over 50 countries, is a North American leader, and supplies a broad range of products and solutions primarily to construction, industrial and original equipment manufacturer (“OEM”) customers. Construction and industrial customers include a wide array of diversified manufacturers and contractors, engineering, procurement and construction firms for industrial, infrastructure, electrical, commercial, and data and broadband communications projects. Specific applications include projects for data centers, hospitals, public transit, waste water treatment facilities, EV charging stations, and renewable and solar power plants. OEM customers require products used in the manufacturing of automotive, industrial, medical, transportation, marine, military and communications equipment. The EES product portfolio includes a broad range of electrical equipment and supplies, automation and connected devices (the “Internet of Things” or “IoT”), security, lighting, wire and cable, safety, and maintenance, repair and operating (“MRO”) products from industry-leading manufacturing partners. The EES service portfolio includes solutions to improve project execution, direct and indirect manufacturing supply chain optimization programs, lighting and renewables advisory services, and digital and automation solutions to improve safety and productivity. The EES segment operates in highly fragmented markets that include thousands of small, regional and locally based privately owned competitors, as well as several large, multi-national companies. 1 Table of Contents Communications & Security Solutions The CSS segment, serving customers in over 50 countries, is a global leader in data center, network infrastructure and security solutions. For data centers, the CSS business leverages the complementary expertise and resources of the UBS and EES business units to deliver an integrated offering, combining various Wesco products and services, with specialized capabilities across all stages of data center design, development, operations, maintenance, and support. Its network infrastructure portfolio includes cabling and connectivity, power systems, wireless technologies, connected devices (IoT), and related products to enable seamless connectivity and communications in commercial buildings, hyperscale data centers, multi-tenant data centers, and cloud-based platforms. In the security business, CSS offers on-premise, cloud or hybrid comprehensive solutions for video surveillance, fire and intrusion detection, access control, door locking, and other technologies that help create safe and intelligent environments for customers.…