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| Copyright © Arista 2026. All rights reserved. 1 Q3 FY 2026 Earnings November 3, 2026
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| Copyright © Arista 2026. All rights reserved. 2 Safe Harbor Forward-Looking Statements - This presentation contains “forward-looking statements” regarding our future performance, including but not limited to guidance regarding revenue, non-GAAP gross margin, non-GAAP operating margin, non-GAAP earnings per share, diluted shares, non-GAAP tax rate for the fourth quarter of fiscal year 2026, outlook regarding revenue, AI fabrics revenue, campus revenue, non-GAAP gross margin, non-GAAP operating margin and non-GAAP tax rate for fiscal year 2026 and 2027, and statements regarding Arista’s potential growth, growth readiness and revenue, statements regarding whether AI, cloud and enterprise demand will continue to drive growth, statements regarding whether future growth in shipments and service renewals will provide increased revenue recognition and benefits ofArista’s long-term planning for critical components, product investments and roadmaps for AI and cloud-scale networking. Forward-looking statements are subject to known and unknown risks, uncertainties, assumptions and other factors that could cause actual results, performance or achievements to differ materially from those anticipated in or implied by the forward-looking statements including but not limited to risks associated with: escalated or escalating U.S. tariffs and countermeasures and retaliatory actions taken by other countries; some of the key components in our products come from sole or limited sources of supply, which increases the risk of supply shortages, extended lead times or supply changes; key component constraints and inventory management; our reliance upon a predominant merchant silicon vendor; enhanced import/export restrictions, as well as countermeasures taken by affected countries; large purchases by a limited number of customers who represent a substantial portion of our revenue; adverse economic conditions, continuing uncertain economic conditions or reduced information technology and network infrastructure spending; volatility in our revenue and revenue growth rates; variability in our gross margins; variations in our results of operations; the rapid evolution of the networking market; failure to successfully carry out new products and service offerings and expand into adjacent markets; intense competition and industry consolidation; expansion of our international sales and operations; investments in or acquisitions of other businesses, products or technologies; industry cyclicality; fluctuations in currency exchange rates; failure to raise additional capital on terms satisfactory to us; our inability to attract new large customers or sell additional products and services to our existing customers; inability to grow sales of switching and routing platforms which generate most of our product revenue; inability to increase market awareness or acceptance of our new products and services; decreases in the sales prices of our products and services; long and unpredictable sales cycles; inability to offer high quality support and services offerings; declines in maintenance renewals and support contracts by customers; product quality problems, defects, errors or vulnerabilities in our products; failure to anticipate technological shifts; our dependence on third-party manufacturers to build our products; assertions by third parties of intellectual property rights infringement, misappropriation or other violations; failure or inability to protect or assert our intellectual property rights; cybersecurity incidents and breaches of our cybersecurity systems, or other security or privacy breaches or incidents; failure to detect cybersecurity incidents; failure to comply with government law and regulations; issues in the development and use of artificial intelligence, combined with an uncertain regulatory environment; future decisions to reduce or discontinue repurchasing our common stock pursuant to our stock repurchase programs; and other future events. Additional risks and uncertainties that could affect us can be found in our most recent filings with the Securities and Exchange Commission, including, but not limited to, our annual report on Form 10-K and quarterly reports on Form 10-Q. You can locate these reports through our website at https://investors.arista.com/ and on theSEC’s website at https://www.sec.gov/. All forward-looking statements in this presentation are based on information available to the company as of the date hereof, and we disclaim any obligation to publicly update or revise any forward-looking statement to reflect events that occur or circumstances that exist after the date on which they were made. Non-GAAP Financial Measures - This presentation contains certain non-GAAP financial measures, including non-GAAP gross profit, non-GAAP gross margin, non-GAAP operating expenses, non-GAAP operating expenses in percentage of revenue, non-GAAP operating income, non-GAAP operating margin, non-GAAP net income, non-GAAP income taxes, non-GAAP tax rate and non-GAAP diluted net income per share. These non-GAAP financial measures exclude stock-based compensation expense, intangible asset amortization, gains/losses on strategic investments, and the income tax effect of these non-GAAP exclusions, including the recognition of direct excess tax benefits associated with stock-based awards. Effective the fourth quarter of fiscal year 2025, the Company updated its methodology for calculating the income tax effect of non-GAAP adjustments. Previously, theCompany’s calculation excluded all tax benefits associated with stock-based awards, consisting of both direct excess tax benefits and other discrete indirect effects. Under the updated methodology, the Company continues to exclude direct excess tax benefits but no longer excludes the discrete indirect effects of such awards. Management believes this change better aligns with industry practice and provides a more meaningful view of theCompany’s effective tax rate. All prior period non-GAAP results presented in this presentation have been recast to conform to the current period presentation.The Company uses these non-GAAP financial measures internally in analyzing its financial results and believes that these non-GAAP financial measures are useful to investors as an additional tool to evaluate ongoing operating results and trends. In addition, these measures are the primary indicators management uses as a basis for its planning and forecasting for future periods. Non-GAAP financial measures are not meant to be considered in isolation or as a substitute for the comparable GAAP financial measures. Non-GAAP financial measures are subject to limitations and should be read only in conjunction with the company's consolidated financial statements prepared in accordance with GAAP. Non-GAAP financial measures do not have any standardized meaning and are, therefore, unlikely to be comparable to similarly titled measures presented by other companies. A description of these non-GAAP financial measures and a reconciliation of thecompany’s non-GAAP financial measures to their most directly comparable GAAP measures have been provided in the appendix included in this presentation, and investors are encouraged to review the reconciliation.
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| Copyright © Arista 2026. All rights reserved. 3 | Copyright © Arista 2026. All rights reserved. 3 Delivered ~$3.7B in revenue, up +58.5% Y/Y. This is the highest Y/Y growth quarter Arista has delivered since its IPO. Above guidance revenue driven by strong growth across product sectors as AI and enterprise demand continues. Revenue in billions $2.308B $3.658B Q3-25 Q3-26
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| Copyright © Arista 2026. All rights reserved. 4 | Copyright © Arista 2026. All rights reserved. 4 Accelerating Revenue Growth: Increasing Y/Y revenue growth in 2025 and 2026. Momentum at Scale: Revenue growth powered by leadership in AI and cloud networking and increasing penetration of the enterprise market. Y/Y Revenue Growth % 2023 – 2026E Revenue CAGR of 32% 1 Reflects the Q4 2026 Revenue guidance midpoint.
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| Copyright © Arista 2026. All rights reserved. 5 9% 8% 11% 16% 9% 3% 0% 3% 9% 3% 8% 18% 29% 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Deferred Revenue has varied over time with major market cycles Deferred Revenue Change as a % of Revenue AI Super Cycle Cloud Super Cycle
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| Copyright © Arista 2026. All rights reserved. 6 | Copyright © Arista 2026. All rights reserved. 6 Deferred Revenue Remains Elevated: Growth in product shipments and service renewals provide a strong foundation for future revenue recognition. Short Term Deferred Revenue exiting Q3- 26 was $5.1B and Long Term Deferred Revenue was $1.7B. Deferred Revenue in billions $6.866B $6.840B Q2-26 Q3-26
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| Copyright © Arista 2026. All rights reserved. 7 | Copyright © Arista 2026. All rights reserved. 7 Leaning In to Meet Strong Demand: Purchase Commitments up to $11.4B, reflecting long-term capacity planning for critical components. ~80% of Purchase Commitments are expected to be used within 12 months. Close Partnership with key suppliers has allowed Arista to secure supply to meet increasing demand. Purchase Commitments in billions $6.8B $8.9B $9.7B $11.4B Q4-25 Q1-26 Q2-26 Q3-26
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| Copyright © Arista 2026. All rights reserved. 8 | Copyright © Arista 2026. All rights reserved. 8 Diversified growth across our global footprint and portfolio. Americas revenue grew fastest with 62% Y/Y growth followed by EMEA at 59% Y/Y and APAC at 32%. Enterprise growth, led by Campus, continues to surge in EMEA and APAC. Geographic Revenue Splits in billions $1.840B $2.975B $0.239B $0.381B $0.229B $0.302B $2.308B $3.658B Q3-25 Q3-26 Americas EMEA APAC
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| Copyright © Arista 2026. All rights reserved. 9 | Copyright © Arista 2026. All rights reserved. 9 Gross Margin (Non-GAAP)1 Delivered above guidance non-GAAP gross margin1 of 64.0%. Change versus the prior year was driven by customer mix. Disciplined manufacturing execution offset higher product costs The main drivers of the beat vs. Q3 guidance of ~63% were product and customer mix. 1 Refer to the reconciliation between non-GAAP and GAAP in the appendix. Q3-25 and Q3-26 GAAP gross margin was 64.6% and 63.6%, respectively. 65.2% 64.0% Q3-25 Q3-26
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| Copyright © Arista 2026. All rights reserved. 10 | Copyright © Arista 2026. All rights reserved. 10 1Refer to the reconciliation between non-GAAP and GAAP in the appendix. Q3-25 and Q3-26 GAAP Operating Expense was $0.512B and $0.683B, respectively. Q3-25 and Q3-26 GAAP Operating Expense as a percentage of revenue was 22.2% and 18.7%, respectively. Operating Expense (Non-GAAP)1 in billions Non-GAAP Operating Expenses as a percentage of revenue1 declined to 14.9%, down from 16.6% a year ago. High-impact investments in liquid cooling R&D balanced by sustained operational discipline.
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| Copyright © Arista 2026. All rights reserved. 11 | Copyright © Arista 2026. All rights reserved. 11 1Refer to the reconciliation between non-GAAP and GAAP in the appendix. GAAP Operating Income for Q3-25 and Q3-26 was $0.978B and $1.642B, respectively. GAAP Operating Margin for Q3-25 and Q3-26 was 42.4% and 44.9%, respectively. Operating Income (Non-GAAP)1 in billions Exceptional Leverage: Non-GAAP Operating Income1 expanded to $1.80B, up +60.1% Y/Y ahead of revenue growth. Non-GAAP Operating Margin1 improved Y/Y to 49.1% in Q3-26 from 48.6% in Q3-25. $1.122B $1.796B Q3-25 Q3-26 48.6% Op Margin 49.1% Op Margin
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| Copyright © Arista 2026. All rights reserved. 12 | Copyright © Arista 2026. All rights reserved. 12 1Amounts are non-GAAP; refer to the reconciliation between non-GAAP and GAAP in the appendix. Prior period amounts have been updated to conform to the current period presentation to reflect the change in methodology for calculating non -GAAP income taxes associated with stock-based awards. The retrospective application of this change resulted in an increase to non -GAAP net income of $17.1 million for Q3-25. GAAP Net Income for Q3-25 and Q3-26 was $0.853B and $1.560B, respectively. Net Income (Non-GAAP)1 in billions Improved Operating Profitability while delivering record year-over-year revenue growth since our IPO. Earnings Accelerated: Strong quarterly non-GAAP net income1 of $1.53B, a +56.3% Y/Y increase fueled by robust top-line execution. $0.979B $1.531B Q3-25 Q3-26
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| Copyright © Arista 2026. All rights reserved. 13 | Copyright © Arista 2026. All rights reserved. 13 1Refer to the reconciliation between non-GAAP and GAAP in the appendix. Prior period amount has been updated to conform to the current period presentation to reflect the change in methodology for calculating non -GAAP income taxes associated with stock-based awards. The impact of this change on non-GAAP diluted net income per share was $0.02 for Q3-25. GAAP EPS for Q3-25 and Q3-26 was $0.67 and $1.22, respectively. EPS (Non-GAAP)1 Shareholder Value Creation: Delivered diluted non-GAAP EPS1 of $1.20, a +55.8% Y/Y increase supported by exceptional operational performance. Non-GAAP EPS of $1.20 came in significantly above $1.06 - $1.08 guidance. $0.77 $1.20 Q3-25 Q3-26
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| Copyright © Arista 2026. All rights reserved. 14 | Copyright © Arista 2026. All rights reserved. 14 Robust Liquidity: Generated $1.2B in operating cash flow this quarter, driven by strong net income. Building Inventory to support demand growth. Healthy Conversion: Consistent cash generation provides the flexibility to fund R&D and strategic capital allocation. Operating Cash Flow in billions
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| Copyright © Arista 2026. All rights reserved. 15 | Copyright © Arista 2026. All rights reserved. 15 Guidance Revenue ~$3.9B-$4.0B Gross Margin (non-GAAP)1 ~63%-64% Operating Margin (non-GAAP)1 48%-49% EPS (non-GAAP)1 $1.26-$1.30 Diluted Shares 1.280B Non-GAAP Tax Rate1 21.0% Fourth Quarter 2026 1Guidance for non-GAAP financial measures excludes certain items, including stock -based compensation expense, intangible asset amortization, tax benefits on stock-based awards, the income tax effect on non -GAAP exclusions and potential non-recurring charges or benefits. A reconciliation of non-GAAP guidance measures to corresponding GAAP measures is not available on a forward -looking basis without unreasonable effort because these exclusions can be uncertain or difficult to predict, including stock -based compensation expense and tax benefits on stock-based awards, which is impacted by the timing of employee stock transactions, and the future f air market value of the company’s common stock. The actual amount of these exclusions will have a significant impact on the compa ny's GAAP gross margin, operating margin, and earnings per share .
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| Copyright © Arista 2026. All rights reserved. 16 | Copyright © Arista 2026. All rights reserved. 16 2027 Guidance 2027 Guidance Revenue Growth 38%-40% Y/Y Gross Margin (non-GAAP)1 62%-64% Operating Margin (non-GAAP)1 ~49% AI Fabrics Revenue Goal ~$7B Campus Revenue Goal ~$2B Non-GAAP Tax Rate1 ~21.0% 1Guidance for non-GAAP financial measures excludes certain items, including stock -based compensation expense, intangible asset amortization, tax benefits on stock-based awards, the income tax effect on non -GAAP exclusions, and potential non-recurring charges or benefits. A reconciliation of non-GAAP guidance measures to corresponding GAAP measures is not available on a forward -looking basis without unreasonable effort because these exclusions can be uncertain or difficult to predict, including stock -based compensation expense and tax benefits on stock-based awards, which is impacted by the timing of employee stock transactions, and the future f air market value of the company’s common stock. The actual amount of these exclusions will have a significant impact on the compa ny's GAAP gross margin and operating margin.
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| Copyright © Arista 2026. All rights reserved. 17 Appendix: GAAP to Non-GAAP Reconciliation 1Prior period amounts have been updated to conform to the current period presentation to reflect the change in methodology for calculating non-GAAP income taxes associated with stock -based awards. The retrospective application of this change resulted in an increase to non -GAAP net income of $17.1 million for Q3-25. The impact of this change on non-GAAP diluted net income per share was $0.02 for Q3 -25.