WESCO International : Stephens Investor Visit Deck_vFinal

Wesco International

Stephens Investor Visit

May 2024

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Forward-Looking Statements

All statements made herein that are not historical facts should be considered as "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve known and unknown risks, uncertainties and other factors that may cause actual results to differ materially. These statements include, but are not limited to, statements regarding business strategy, growth strategy, competitive strengths, productivity and profitability enhancement, competition, new product and service introductions, and liquidity and capital resources. Such statements can generally be identified by the use of words such as "anticipate," "plan," "believe," "estimate," "intend," "expect," "project," and similar words, phrases or expressions or future or conditional verbs such as "could," "may," "should," "will," and "would," although not all forward-looking statements contain such words. These forward-looking statements are based on current expectations and beliefs of Wesco's management, as well as assumptions made by, and information currently available to, Wesco's management, current market trends and market conditions and involve risks and uncertainties, many of which are outside of Wesco's and Wesco's management's control, and which may cause actual results to differ materially from those contained in forward-looking statements. Accordingly, you should not place undue reliance on such statements.

Important factors that could cause actual results or events to differ materially from those presented or implied in the forward-looking statements include, among others, the failure to achieve the anticipated benefits of, and other risks associated with, acquisitions, joint ventures, divestitures and other corporate transactions; the inability to successfully integrate acquired businesses; the impact of increased interest rates or borrowing costs; fluctuations in currency exchange rates; failure to adequately protect Wesco's intellectual property or successfully defend against infringement claims; the inability to successfully deploy new technologies, digital products and information systems or to otherwise adapt to emerging technologies in the marketplace, such as those incorporating artificial intelligence; failure to execute on our efforts and programs related to environmental, social and governance (ESG) matters; unanticipated expenditures or other adverse developments related to compliance with new or stricter government policies, laws or regulations, including those relating to data privacy, sustainability and environmental protection; the inability to successfully develop, manage or implement new technology initiatives or business strategies, including with respect to the expansion of e-commerce capabilities and other digital solutions and digitalization initiatives; disruption of information technology systems or operations; natural disasters (including as a result of climate change), health epidemics, pandemics and other outbreaks; supply chain disruptions; geopolitical issues, including the impact of the evolving conflicts in the Middle East and Russia/Ukraine; the impact of sanctions imposed on, or other actions taken by the U.S. or other countries against, Russia or China; the failure to manage the increased risks and impacts of cyber incidents or data breaches; and exacerbation of key materials shortages, inflationary cost pressures, material cost increases, demand volatility, and logistics and capacity constraints, any of which may have a material adverse effect on the Company's business, results of operations and financial condition. All such factors are difficult to predict and are beyond the Company's control. Additional factors that could cause results to differ materially from those described above can be found in Wesco's most recent Annual Report on Form 10-K and other periodic reports filed with the U.S. Securities and Exchange Commission.

Non-GAAP Measures

In addition to the results provided in accordance with U.S. Generally Accepted Accounting Principles ("U.S. GAAP"), this presentation includes certain non-GAAP financial measures. These financial measures include organic sales growth, gross profit, gross margin, earnings before interest, taxes, depreciation and amortization (EBITDA), adjusted EBITDA, adjusted EBITDA margin, financial leverage, free cash flow,

adjusted selling, general and administrative ("SG&A") expenses, adjusted income from operations, adjusted operating margin, adjusted provision for income taxes, adjusted income before income taxes, adjusted

net income, adjusted net income attributable to Wesco International, Inc., adjusted net income attributable to common stockholders, and adjusted earnings per diluted share. The Company believes that these non-GAAP measures are useful to investors as they provide a better understanding of our financial condition and results of operations on a comparable basis. Additionally, certain non-GAAP measures either focus on or exclude items impacting comparability of results such as merger-related and integration costs, and the related income tax effect of such items, allowing investors to more easily compare the Company's financial performance from period to period. Management does not use these non-GAAP financial measures for any purpose other than the reasons stated above.

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Wesco Overview

Leading global provider of business-to-business distribution, logistics services and supply chain solutions

Leading value proposition with millions of products, an expanding portfolio of services, and complete supply chain solutions

Serving majority of Fortune 500 companies as well as commercial and industrial businesses, contractors, government agencies, institutions, utilities, and telecommunications providers

Substantial Scale With

Leading Industry Position and

Global Capabilities

$22.4B 50+ ~800 #1

2023 Sales	Countries	Locations	In North
			America

Sales

By Business Unit1

UBS

27%

CSS

33%

Sales	ROW
By Geography	13%
	Canada
	13%

EES

40%

U.S.

74%

Source: MDM Top Distributors List		3
Sales amounts as of 12/31/23
1	Excludes Integrated Supply business which was divested as of April 1, 2024

Key Messages

Created Fortune 200 Industry Leader with Global Scale

Uniquely Well Positioned for the Next Decade and Beyond

Digital Transformation Enables

Even Faster Share Gain and

Margin Expansion

• Transformational combination of Wesco + Anixter exceeded expectations
• Broadest portfolio in the industry and largest channel partner for our key suppliers
• Step function increase in cash generation and enterprise value creation
• Leading player in a consolidating industry
• Secular growth trends drive above-market growth
• Global scale and improved business mix into faster growth and higher margin end-markets
• Investing in digital to drive competitive advantage
• Unlocking power of our big data to further drive sales and margin
• Digital investments building new capabilities

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Value Creation Engine

Five components of our growth compounding enterprise

5	Upsized Cash Flow Supports Strategic	1	Positioned In the Right End-Markets
Objectives	•	Three leading global business units
•	Accelerating growth and margin expansion		• Exposure to attractive secular trends
	•	Investing for above-market growth		•	Increasing infrastructure investments

• Increasing shareholder returns

			Wesco Value
4	Margin Expansion	Creation Engine	2
	Driving Market Outperformance
•	Value-based pricing
•	Benefits of scale and operating cost leverage		•	Leading player with substantial scale
	• Digitalization of our business and value chain			•	Cross-selling driving share capture
			•	Ongoing industry consolidation

3 Operational and Supply Chain Excellence

• Proven integration and synergy-capture capabilities

• Margin improvement and productivity programs

• Continuous improvement culture founded on lean principles

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CSS Overview

Deliver comprehensive solutions that provide 24/7/365 connectivity

Approximately 25% of sales from data centers and expected to grow double-digits in support of increasing demands (including AI)

World-class global accounts program and supply chain services model

Global Scale and Capabilities

$7.2B 50+ Leading

Sales

By End-Market

Data Center

26%

Security

37%

Sales

By Geography

ROW

37%

Enterprise

Network

Infrastructure

S e c u r i t y

2023 Sales	Countries	Global Distributor
		of Network
		Infrastructure and
		Security Solutions

28%

Canada

6%

U.S.

66%

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CSS 2024 Projected Global Market Size

Data	Enterprise	Security	Professional	In-Building	Safety
Centers	Infrastructure		A/V	Wireless

Primary

Markets

Per Annum*

	$100B	$15B	$100B	$40B		$8B	$75B
	Automation and IoT		Digitalization and AI		24/7/365 Connectivity
Secular	• Convergence of IT / OT creating new	• Generative AI market CAGR of ~27%	•	5G, AI/ML and connected devices
use cases and business outcomes	through 2023, accelerating adoption		(IoT) driving increased data creation,
Trends	• Organizations developing long-term	• 47% of IoT applications are expected		distribution and consumption
•	Data center market demand will
	technology roadmaps		to have an AI element by 2027
			reach 35 gigawatts by 2030, up from

17 gigawatts in 2022

*Total addressable market estimates based on external industry reports and company estimates

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Secular Trends Driving Data Center Growth and Connectivity

24/7/365	+	Accelerating Data	+	Increasing Adoption	=	Demand for Data Storage
Connectivity	Consumption	of Cloud	and Management

Automation and Smart

Anything Everywhere

AI, IoT, Machine Learning

5G and Bandwidth Demand

Cloud Adoption and

Migration

Virtual Collaboration and

Remote Working

Connected Devices and

Smart Devices

Processing, Storing and Managing Large Volumes

of Data Driving Data Center Growth

Increased	21% CAGR	Greater than
Data	Total Data Center Volume	Historical
Growth
	2021 - 2026

Sources: Barclays Capital, Markets and Markets, McKinsey, Company estimates

Creating

opportunities for sustainable and profitable sales growth

3x or 26% CAGR	40+ Billion	11% CAGR
Internet traffic growth from	Number of IoT connected devices	Growth of video conferencing
2017 to 2023	in 2023; Up 3x versus 2018	market through 2025

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Enterprise Network Infrastructure

Comprehensive solutions including cables and components that connect data communications equipment and end devices

37%

of CSS

Service Provider Applications (~30%)

Internet Service Provider

Tier 1 -3

Global providers of internet access

Structured Cabling Applications (~70%)

On-Premise Cabling and Network Connectivity

Fiber Optic Cabling	Copper Cabling	Wireless	Racks and Enclosures	Cable Management and
Wide-area and local-area	Supporting Ethernet,	Wireless connectivity that	Protecting critical network	Pathways
networks across a building,	wireless, professional A/V, enables IoT, safety,	components from damage	Intelligent cable routing,
campus, or geographic area	and building controls	productivity, security, and	while optimizing space	raceway and conveyance
		mobility		systems

Key Service Offerings		Key Supplier Partners

• Advisory services and network design
• Technology selection
• Kitting, staging and multi-site deployment
• Global logistics and project coordination

• Wire & cable customization
• • Cut to length
  • Patch cord labeling and bundling
• Ready-to-installracks, cabinets and network devices
• Global network of certified installation partners

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Security

Technology-driven solutions that protect people, property and assets

37%

of CSS

Applications

Access Control	Video Surveillance	Fire and Safety	Intrusion Detection	Other
Mechanical, electronic, and	IP-based surveillance	Complex solutions that meet	Sensor-based and	Pro AV and Network
logical access systems	systems	all regulatory requirements	automated detection systems	Infrastructure
~35%	~30%
		~35%

Key Service Offerings

Key Supplier Partners

• Advisory services and network design
• Technology selection
• Kitting, staging and multi- site deployment
• Global logistics and project coordination

• Ready-to-installdevices with IP addressing (cameras, speakers, switches and more)
• Global network of certified installation partners

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