Exhibit 99.1

CISCO REPORTS THIRD QUARTER EARNINGS

Solid Quarter Driven by Strong Execution; Continued Strong Margins and Momentum in Growth Areas

SAN JOSE, Calif. — May 18, 2016 — Cisco today reported third quarter results for the period ended April 30, 2016. Cisco reported third quarter revenue of $12.0 billion, net income on a generally accepted accounting principles (GAAP) basis of $2.3 billion or $0.46 per share, and non-GAAP net income of $2.9 billion or $0.57 per share.

“We delivered a strong Q3, executing well despite the challenging environment,” said Chuck Robbins, Cisco chief executive officer. “I’m pleased with our performance today as well as the progress we’re making in transitioning our business to a more software and subscription focus, which we’ll continue to apply across our entire portfolio.”

GAAP Results

Non-GAAP Results

The third quarter of fiscal 2016 had 14 weeks compared with 13 weeks in the third quarter of fiscal 2015.

A reconciliation between net income and EPS on a GAAP and non-GAAP basis is provided in the table following the Consolidated Statements of Operations. Supplementary information related to other GAAP and non-GAAP measures is also provided in the tables following.

“Once again we delivered a solid quarter in Q3, with 3% top line growth, and even faster non-GAAP EPS growth and strong margins,” said Kelly Kramer, Cisco executive vice president and chief financial officer. “We executed well on our financial strategy, allowing us to invest in our business model transition to software and recurring revenues so that our customers are able to consume Cisco technology in the way that is best for their business.”

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Financial Highlights for Q3 Fiscal 2016

All comparative percentages are on a year-over-year basis unless otherwise noted.

All revenue, non-GAAP, and geographic financial information in this “Financial Highlights for Q3 Fiscal 2016” section are presented excluding the SP Video CPE Business for prior periods as it was divested during the second quarter of fiscal 2016 on November 20, 2015.

Revenue — Revenue was $12.0 billion, up 3% with product revenue up 1% and service revenue up 11%. Revenue by geographic segment was: Americas up 4%, EMEA down 2%, and APJC up 10%. Product revenue growth was led by Security, Collaboration and SP Video which increased by 17%, 10% and 18%, respectively. Wireless and Data Center each increased by 1%, while Switching and NGN Routing decreased by 3% and 5%, respectively.

Gross Margin — On a GAAP basis, total gross margin and product gross margin were 64.3% and 63.8%, respectively. The increase in the product gross margin compared with 61.6% in the third quarter of fiscal 2015 was primarily due to continued productivity improvements and the divestiture of the SP Video CPE Business, partially offset by pricing and to a lesser extent product mix.

Non-GAAP total gross margin and product gross margin were 65.2% and 64.5%, respectively. The non-GAAP product gross margin was unchanged compared to the third quarter of fiscal 2015 as continued productivity improvements were offset by pricing and to a lesser extent product mix.

GAAP service margin was 65.9% and non-GAAP service gross margin was 67.1%.

Total gross margins by geographic segment were: 66.3% for the Americas, 65.5% for EMEA and 60.4% for APJC.

Operating Expenses — On a GAAP basis, operating expenses were $4.7 billion, up 3%. Non-GAAP operating expenses were $4.2 billion, up 4%, and at 35.2% of revenue. Headcount compared with the end of the second quarter of fiscal 2016 increased by 1,447 to 73,104, driven by additional headcount from acquisitions and investments in key growth areas such as security, cloud and software.

Operating Income — GAAP operating income was $3.0 billion, up 2%, with GAAP operating margin of 24.9%. Non-GAAP operating income was $3.6 billion, up 5%, with non-GAAP operating margin at 30.0%.

Provision for Income Taxes — The GAAP tax provision rate was 23.8%. The non-GAAP tax provision rate was 22.0%.

Net Income and EPS — On a GAAP basis, net income was $2.3 billion and EPS was $0.46. On a non-GAAP basis, net income was $2.9 billion, an increase of 4%, and EPS was $0.57, an increase of 6%.

Cash Flow from Operating Activities — was $3.1 billion an increase of 1% compared with $3.0 billion for the third quarter of fiscal 2015.

Cash and Cash Equivalents and Investments — were $63.5 billion at the end of the third quarter of fiscal 2016, compared with $60.4 billion at the end of the second quarter of fiscal 2016, and compared with $60.4 billion at the end of fiscal 2015. The total cash and cash equivalents and investments available in the United States at the end of the third quarter of fiscal 2016 were $6.3 billion.

Deferred Revenue — was $15.3 billion, up 8% in total, with deferred product revenue up 9%, driven largely by subscription-based and software offerings, and deferred service revenue up 7%. Cisco continued to build a greater mix of recurring revenue as reflected in deferred revenue.

Days Sales Outstanding in Accounts Receivable (DSO) — was 33 days at the end of the third quarter of fiscal 2016, compared with 33 days at the end of the second quarter of fiscal 2016, and compared with 37 days at the end of the third quarter of fiscal 2015.

Other Financial Highlights

In the third quarter of fiscal 2016, Cisco declared and paid a cash dividend of $0.26 per common share, or $1.3 billion. For the third quarter of fiscal 2016, Cisco repurchased approximately 27 million shares of common stock under its stock repurchase program at an average price of $24.08 per share for an aggregate purchase price of $649 million.

As of April 30, 2016, Cisco had repurchased and retired 4.6 billion shares of Cisco common stock at an average price of $20.99 per share for an aggregate purchase price of approximately $95.8 billion since the inception of the stock repurchase program. The remaining authorized amount for stock repurchases under this program is approximately $16.2 billion with no termination date.

Acquisitions

During the third quarter of fiscal 2016, Cisco completed the following acquisitions:

Jasper Technologies — provides a cloud-based Internet of Things (IoT) service platform to help enterprises and service providers launch, manage and monetize IoT services on a global scale.

Acano — provides on-premises and cloud-based video infrastructure and collaboration software.

Synata — will enable us to deliver search capabilities for collaboration cloud applications.

Leaba — a fabless semiconductor company whose semiconductor expertise is expected to help to accelerate Cisco’s next generation product portfolio and bring new capabilities to the market faster.

CliQr — provides an application-defined cloud orchestration platform that is expected to help Cisco customers simplify and accelerate their private, public and hybrid cloud deployments.

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Business Outlook for Q4 Fiscal 2016

Cisco estimates that GAAP EPS will be $0.48 to $0.53 which is lower than non-GAAP EPS by $0.08 to $0.11 per share in the fourth quarter of fiscal 2016 as follows:

Share-based compensation expense is expected to impact Cisco’s results of operations in similar proportions as the third quarter of fiscal 2016. Amortization of purchased intangible assets and other acquisition-related/divestiture costs will be reported as GAAP operating expenses, cost of sales, or other income/(loss) as applicable. Except as noted above, this guidance does not include the effects of any future acquisitions/divestitures, asset impairments, restructurings and tax or other events, which may or may not be significant unless specifically stated.

On November 20, 2015, during the second quarter of fiscal 2016, Cisco completed its divestiture of the SP Video CPE Business. In order to provide a clear view of Cisco’s continuing expected financial performance, the revenue guidance for the fourth quarter of fiscal 2016 is normalized to exclude the SP Video CPE Business for the fourth quarter of fiscal 2015. The corresponding revenue in the fourth quarter of fiscal 2015 for the SP Video CPE Business was $487 million.

Cisco expects to achieve the following results for the fourth quarter of fiscal year 2016:

Editor’s Notes:

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CISCO SYSTEMS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(In millions, except per-share amounts)

(Unaudited)

The Consolidated Statements of Operations include the results of the SP Video CPE Business prior to its divestiture during the second quarter of fiscal 2016 on November 20, 2015. Accordingly, the nine months ended April 30, 2016 include four months of financial results for this business.

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CISCO SYSTEMS, INC.

RECONCILIATION OF GAAP TO NON-GAAP NET INCOME

(In millions, except per-share amounts)

⁽¹⁾ During the second quarter of fiscal 2016 on November 20, 2015, Cisco completed its divestiture of the SP Video CPE Business. This sale resulted in a pre-tax gain of $285 million, net of certain transaction costs incurred. The gain on this transaction was excluded from non-GAAP net income for the first nine months of fiscal 2016.

⁽²⁾ Cisco recorded certain net tax benefits totaling $465 million related to prior-year periods that were excluded from non-GAAP net income for the first nine months of fiscal 2016.

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CISCO SYSTEMS, INC.

REVENUE BY SEGMENT

(In millions, except percentages)

During the second quarter of fiscal 2016 on November 20, 2015, Cisco completed its divestiture of the SP Video CPE Business. SP Video CPE Business revenue for the three months ended April 25, 2015 was $519 million and for the nine months ended April 30, 2016 and April 25, 2015 was $504 million and $1,359 million, respectively.

CISCO SYSTEMS, INC.

GROSS MARGIN PERCENTAGE BY SEGMENT

(In percentages)

⁽¹⁾ During the second quarter of fiscal 2016 on November 20, 2015, Cisco completed its divestiture of the SP Video CPE Business. SP Video CPE Business gross profit for the nine months ended April 30, 2016 was $41 million and $15 million for the Americas and EMEA, respectively.

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CISCO SYSTEMS, INC.

REVENUE FOR GROUPS OF SIMILAR PRODUCTS AND SERVICES

(In millions, except percentages)

⁽¹⁾ Excludes SP Video CPE Business revenue for all periods presented as it was divested during the second quarter of fiscal 2016 on November 20, 2015. SP Video CPE Business revenue was $519 million and $1,359 million for the three and nine months ended April 25, 2015, respectively.

⁽²⁾ Includes SP Video CPE Business revenue through the date of divestiture of November 20, 2015.

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CISCO SYSTEMS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In millions)

(Unaudited)

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CISCO SYSTEMS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In millions)

(Unaudited)

Certain reclassifications have been made to prior year amounts to conform to the current year’s presentation.

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CISCO SYSTEMS, INC.

DEFERRED REVENUE

(In millions)

CISCO SYSTEMS, INC.

INVENTORIES AND INVENTORY TURNS

(In millions, except annualized inventory turns)

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CISCO SYSTEMS, INC.

DIVIDENDS PAID AND REPURCHASES OF COMMON STOCK

(In millions, except per-share amounts)

CISCO SYSTEMS, INC.

FREE CASH FLOW

(In millions)

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CISCO SYSTEMS, INC.

SUPPLEMENTARY INFORMATION - RECONCILIATIONS OF GAAP TO NON-GAAP MEASURES

GROSS MARGINS, OPERATING EXPENSES, OPERATING MARGINS, AND NET INCOME

(In millions, except percentages)

On November 20, 2015, during the second quarter of fiscal 2016, Cisco completed its divestiture of the SP Video CPE Business. Accordingly, the growth rates above are normalized to exclude the SP Video CPE Business for the third quarter of fiscal 2015 as detailed in the table below.

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EFFECTIVE TAX RATE

(In percentages)

COST OF SALES USED IN INVENTORY TURNS

(In millions)

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Forward Looking Statements, Non-GAAP Information and Additional Information

This release may be deemed to contain forward-looking statements, which are subject to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include, among other things, statements regarding future events (such as the impact of the challenging macro environment, our ability to transition our business model to software and recurring revenues across our entire portfolio, our ability to deliver profitable growth and maintain strong margins, and our financial guidance) and the future financial performance of Cisco that involve risks and uncertainties. Readers are cautioned that these forward-looking statements are only predictions and may differ materially from actual future events or results due to a variety of factors, including: business and economic conditions and growth trends in the networking industry, our customer markets and various geographic regions; global economic conditions and uncertainties in the geopolitical environment; overall information technology spending; the growth and evolution of the Internet and levels of capital spending on Internet-based systems; variations in customer demand for products and services, including sales to the service provider market and other customer markets; the return on our investments in certain priorities, key growth areas, and in certain geographical locations, as well as maintaining leadership in routing, switching and services; the timing of orders and manufacturing and customer lead times; changes in customer order patterns or customer mix; insufficient, excess or obsolete inventory; variability of component costs; variations in sales channels, product costs or mix of products sold; our ability to successfully acquire businesses and technologies and to successfully integrate and operate these acquired businesses and technologies; our ability to achieve expected benefits of our partnerships; increased competition in our product and service markets, including the data center market; dependence on the introduction and market acceptance of new product offerings and standards; rapid technological and market change; manufacturing and sourcing risks; product defects and returns; litigation involving patents, intellectual property, antitrust, shareholder and other matters, and governmental investigations; man-made problems such as cyber-attacks, data protection breaches, computer viruses or terrorism; natural catastrophic events; a pandemic or epidemic; our ability to achieve the benefits anticipated from our investments in sales, engineering, service, marketing and manufacturing activities; our ability to recruit and retain key personnel; our ability to manage financial risk, and to manage expenses during economic downturns; risks related to the global nature of our operations, including our operations in emerging markets; currency fluctuations and other international factors; changes in provision for income taxes, including changes in tax laws and regulations or adverse outcomes resulting from examinations of our income tax returns; potential volatility in operating results; and other factors listed in Cisco’s most recent reports on Forms 10-Q and 10-K filed on February 18, 2016 and September 8, 2015, respectively. The financial information contained in this release should be read in conjunction with the consolidated financial statements and notes thereto included in Cisco’s most recent reports on Forms 10-Q and 10-K as each may be amended from time to time. Cisco’s results of operations for the three and nine months ended April 30, 2016 are not necessarily indicative of Cisco’s operating results for any future periods. Any projections in this release are based on limited information currently available to Cisco, which is subject to change. Although any such projections and the factors influencing them will likely change, Cisco will not necessarily update the information, since Cisco will only provide guidance at certain points during the year. Such information speaks only as of the date of this release.

This release includes non-GAAP net income, non-GAAP gross margins, non-GAAP operating expenses, non-GAAP operating income and margin, non-GAAP effective tax rates, non-GAAP net income per share data, non-GAAP inventory turns and free cash flow for the periods presented. It also includes future estimated ranges for gross margin, operating margin, tax provision rate and EPS on a non-GAAP basis.

These non-GAAP measures are not in accordance with, or an alternative for, measures prepared in accordance with generally accepted accounting principles and may be different from non-GAAP measures used by other companies. In addition, these non-GAAP measures are not based on any comprehensive set of accounting rules or principles. Cisco believes that non-GAAP measures have limitations in that they do not reflect all of the amounts associated with Cisco’s results of operations as determined in accordance with GAAP and that these measures should only be used to evaluate Cisco’s results of operations in conjunction with the corresponding GAAP measures.

Cisco believes that the presentation of non-GAAP measures when shown in conjunction with the corresponding GAAP measures, provides useful information to investors and management regarding financial and business trends relating to its financial condition and its historical and projected results of operations. In addition, Cisco believes that the presentation of non-GAAP inventory turns provides useful information to investors and management regarding financial and business trends relating to inventory management based on the operating activities of the periods presented. Cisco believes that the presentation of free cash flow, which it defines as the net cash provided by operating activities less cash used to acquire property and equipment, to be a liquidity measure that provides useful information to management and investors because of its intent to return a stated percentage of free cash flow to shareholders in the form of dividends and stock repurchases. Cisco further regards free cash flow as a useful measure because it reflects cash that can be used to, among other things, invest in its business, make strategic acquisitions, repurchase common stock and pay dividends on its common stock, after deducting capital investments.

For its internal budgeting process, Cisco’s management uses financial statements that do not include, when applicable, share-based compensation expense, amortization of acquisition-related intangible assets, impact to cost of sales from purchase accounting adjustments to inventory, acquisition-related/divestiture costs, significant asset impairments and restructurings,

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significant litigation and other contingencies, significant gains and losses on investments, the income tax effects of the foregoing and significant tax matters. Cisco’s management also uses the foregoing non-GAAP measures, in addition to the corresponding GAAP measures, in reviewing the financial results of Cisco. In prior periods, Cisco has excluded other items that it no longer excludes for purposes of its non-GAAP financial measures. From time to time in the future there may be other items that Cisco may exclude for purposes of its internal budgeting process and in reviewing its financial results. For additional information on the items excluded by Cisco from one or more of its non-GAAP financial measures, refer to the Form 8-K regarding this release furnished today to the Securities and Exchange Commission.

Cisco divested the Customer Premises Equipment portion of the Service Provider Video Connected Devices business (“SP Video CPE Business”) during the second quarter of fiscal 2016 on November 20, 2015. This release includes, where indicated, financial measures that exclude the SP Video CPE Business. Cisco believes that the presentation of these measures provides useful information to investors and management regarding financial and business trends relating to its financial condition and its historical and projected results of operations because the SP Video CPE Business is no longer part of Cisco and will not be part of Cisco on a go forward basis. Cisco’s management also uses the financial measures excluding the SP Video CPE Business in reviewing the financial results of Cisco.

About Cisco

Cisco (NASDAQ: CSCO) is the worldwide technology leader that has been making the Internet work since 1984. Our people, products and partners help society securely connect and seize tomorrow’s digital opportunity today. Discover more at thenetwork.cisco.com and follow us on Twitter at @Cisco.

Copyright ^© 2016 Cisco and/or its affiliates. All rights reserved. Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to: www.cisco.com/go/trademarks. Third-party trademarks mentioned in this document are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. This document is Cisco Public Information.

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