Exhibit 99.1

Hortonworks Reports Record 2016 Revenue of $184.5 Million

and Fourth Quarter Revenue of $52.0 Million

SANTA CLARA, Calif.—February 9, 2017—Hortonworks, Inc.^® (NASDAQ: HDP), a leading innovator of open and connected data platforms, today announced financial results for the fourth quarter and full year 2016.

“Our fourth quarter performance was highlighted by double-digit growth in support subscription revenue, clearly showing continued strong market demand for our open source platforms,” said Rob Bearden, chief executive officer and chairman of the board of directors of Hortonworks. “The combination of enterprise customers’ accelerating business transformations fueled by data and our continued financial discipline positions Hortonworks extremely well for growth and success in 2017.”

Fourth Quarter and Full Year 2016 Financial Highlights

Revenue

Operating Billings

Gross Profit

Operating Loss

Net Loss

Adjusted EBITDA

We historically calculated Adjusted EBITDA as revenue plus change in deferred revenue minus non-GAAP expenses plus depreciation. We provided guidance for each element of Adjusted EBITDA through the fourth quarter of fiscal 2016, which we targeted for Adjusted EBITDA breakeven.

Deferred Revenue

Cash & Investments

A reconciliation of GAAP to non-GAAP financial measures has been provided in the financial statement tables included in this press release.

Recent Business Highlights

Financial Outlook

As of February 9, 2017, Hortonworks is providing the following financial outlook for its first quarter and full year 2017:

For the first quarter of 2017, we expect:

Total GAAP revenue of $52.0 million.

GAAP operating margin between negative 115 percent and negative 110 percent, which includes stock-based compensation and related expenses and amortization of purchased intangibles of approximately $26.0 million.

Non-GAAP operating margin between negative 65 percent and negative 60 percent, which excludes stock-based compensation and related expenses and amortization of purchased intangibles of approximately $26.0 million.

For the full year 2017, we expect:

Total GAAP revenue between $235.0 million and $240.0 million.

GAAP operating margin between negative 85 percent and negative 80 percent, which includes stock-based compensation and related expenses and amortization of purchased intangibles of approximately $105.0 million.

Non-GAAP operating margin between negative 50 percent and negative 45 percent, which excludes stock-based compensation and related expenses and amortization of purchased intangibles of approximately $105.0 million.

GAAP operating margin outlook includes estimates of stock-based compensation and related expenses and amortization of purchased intangibles in future periods and assumes, among other things, the occurrence of no additional acquisitions, investments or restructuring and no further revisions to stock-based compensation and related expenses.

Fourth Quarter and Full Year 2016 Earnings Conference Call and Webcast Details

Hortonworks will hold a conference call and webcast to discuss the Q4 and FY 2016 results, Q1 and FY 2017 outlook and related matters at 1:30 p.m. Pacific Time (4:30 p.m. Eastern Time) on Thursday, February 9, 2017. Interested parties may access the call by dialing (877) 930-7786 in the U.S. or (253) 336-7423 from international locations. In addition, a live audio webcast of the conference call will be available on the Hortonworks Investor Relations website at http://investors.hortonworks.com.

Shortly after the conclusion of the conference call, a replay of the audio webcast will be available on the Hortonworks Investor Relations website for approximately seven days.

Statement Regarding Use of Non-GAAP Financial Measures

Hortonworks reports non-GAAP results for gross profit and margins, operating loss and margins, net loss, basic and diluted net loss per share and expenses in addition to, and not as a substitute for, or superior to, financial measures calculated in accordance with GAAP.

Hortonworks’ financial measures under GAAP include stock-based compensation expense, acquisition-related items, amortization of intangible assets, depreciation expense, and other income/expense, net. Management believes the presentation of operating results that exclude these items provides useful supplemental information to investors and facilitates the analysis of the Company’s core operating results and comparison of operating results across reporting periods. Management also believes that this supplemental non-GAAP information is therefore useful to investors in analyzing and assessing the Company’s past and future operating performance.

Non-GAAP cost of revenue is calculated as GAAP cost of revenue less stock-based compensation expense and amortization of intangibles. Management believes non-GAAP cost of revenue offers investors useful supplemental information regarding the performance of our business, and will help investors better understand our business.

Non-GAAP gross profit is calculated as non-GAAP revenue less our non-GAAP cost of revenue. Management believes non-GAAP gross profit offers investors useful supplemental information to help compare our recurring core business operating results over multiple periods.

Non-GAAP gross margin is calculated as non-GAAP gross profit divided by non-GAAP revenue. Management believes that non-GAAP gross margin offers investors useful supplemental information in evaluating our ongoing operational performance, and will help investors better understand our underlying business.

Non-GAAP expenses is calculated as GAAP cost of revenue plus stock-based compensation expense and amortization of intangibles plus GAAP operating expenses plus stock-based compensation expense and amortization of intangibles. Management believes non-GAAP expenses offers investors useful supplemental information regarding the cost structure of our business, and will help investors better understand our business.

Non-GAAP operating loss is calculated as GAAP operating loss plus GAAP revenue adjustments and non-GAAP cost of revenue and operating expense adjustments. The Company believes that non-GAAP operating loss is a useful metric for management and investors because it excludes the effect of stock-based compensation expense, acquisition-related retention bonus, amortization of intangibles and other nonrecurring items so that our management and investors have a greater visibility to the underlying performance of the business operations.

Non-GAAP operating margin is calculated as non-GAAP operating loss divided by non-GAAP revenue. Management believes that non-GAAP operating margin offers investors useful supplemental information in evaluating our operating performance because it provides them with an additional tool to compare business performance across companies and across periods.

Non-GAAP net loss is calculated as GAAP net loss plus GAAP revenue adjustments and non-GAAP cost of revenue and operating expense adjustments. Management believes non-GAAP net loss offers investors useful supplemental information to help identify trends in our underlying business and perform related trend analyses.

Non-GAAP net loss per basic and diluted share is calculated as non-GAAP net loss divided by the weighted-average shares outstanding for the period. Management believes non-GAAP net loss per basic and diluted share offers investors useful supplemental information, and will help investors better understand our performance and return to shareholders.

Adjusted EBITDA is calculated as revenue plus change in deferred revenue minus non-GAAP expenses plus depreciation. Management uses adjusted EBITDA in conjunction with traditional GAAP operating performance measures as part of our overall assessment of our performance and for planning purposes, including the preparation of our annual operating budget, to evaluate the effectiveness of our business strategies and to communicate with our board of directors concerning our financial performance.

Use of Forward-Looking Statements

This press release contains “forward-looking statements” regarding our performance within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such statements contain words such as “may,” “will,” “might,” “expect,” “believe,” “anticipate,” “could,” “would,” “estimate,” “continue,” “pursue,” or the negative thereof or comparable terminology, and may include (without limitation) information regarding our expectations, goals or intentions regarding future performance, expenses or activity in international markets, including the forward-looking statements, including in the section titled “Financial Outlook.” Forward-looking statements are subject to known and unknown risks and uncertainties and are based on potentially inaccurate assumptions that could cause actual results to differ materially from those expected or implied by the forward-looking statements. If any such risks or uncertainties materialize or if any of the assumptions prove incorrect, our results could differ materially from the results expressed or implied by the forward-looking statements we make.

The important factors that could cause actual results to differ materially from those in any forward-looking statements include, but are not limited to, the following: (i) we have a history of losses, and we may not become profitable in the future, (ii) we have a limited operating history, which makes it difficult to predict our future results of operations, and (iii) we do not have an adequate history with our support subscription offerings or pricing models to accurately predict the long-term rate of support subscription customer renewals or adoption, or the impact these renewals and adoption will have on our revenues or results of operations.

Further information on these and other factors that could affect our financial results and the forward-looking statements in this press release are included in our Form 10-K filed on March 15, 2016, our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2016, June 30, 2016 and September 30, 2016 filed on May 9, 2016, August 9, 2016 and November 8, 2016, respectively, or in other filings we make with the Securities and Exchange Commission from time to time, particularly under the caption Risk Factors.

All forward-looking statements in this press release are made as of the date hereof, based on information available to us as of the date hereof, and we undertake no obligation, and do not intend, to update these forward-looking statements.

About Hortonworks

Hortonworks is an industry leading innovator that creates, distributes and supports enterprise-ready open data platforms and modern data applications that deliver actionable intelligence from all data: data-in-motion and data-at-rest. Hortonworks is focused on driving innovation in open source communities such as Apache Hadoop, NiFi and Spark. Along with its 2,000+ partners, Hortonworks provides the expertise, training and services that allow customers to unlock transformational value for their organizations across any line of business.

Hortonworks, Powering the Future of Data, HDP and HDF are registered trademarks or trademarks of Hortonworks, Inc. and its subsidiaries in the United States and other jurisdictions. For more information, please visit www.hortonworks.com. All other trademarks are the property of their respective owners.

Hortonworks, Inc.

Unaudited Condensed Consolidated Statements of Operations

(in thousands, except share and per share data)

Hortonworks, Inc.

Unaudited Condensed Consolidated Balance Sheets

(in thousands, except share and per share data)

Hortonworks, Inc.

Unaudited Condensed Consolidated Statements of Cash Flows

(in thousands)

Hortonworks, Inc.

Reconciliation of GAAP to Non-GAAP

(in thousands, except share and per share amounts)

For Additional Information Contact:

Reuben Gallegos

VP, Investor Relations and Corporate Development

rgallegos@hortonworks.com