Exhibit 99.1

				News Release

ACI Worldwide, Inc. Reports Financial Results for the

Quarter and Full Year Ended December 31, 2015

HIGHLIGHTS

NAPLES, FLA — February 25, 2016 — ACI Worldwide (NASDAQ: ACIW), a leading global provider of real-time electronic payment and banking solutions, today announced financial results for the quarter and full year ended December 31, 2015.

“We delivered our strongest organic SNET growth of the year in Q4 and set a new sales bookings record. With the retailer segment showing particular interest in our omni-channel offering and with the introduction of our new Universal Payments support for our legacy BASE24 customers, we are increasingly confident our recent strategic moves position the Company well for long-term growth,” commented Phil Heasley, President and CEO, ACI Worldwide. “We look forward to capitalizing on the acceleration in broad market interest we are seeing for our payment solutions in 2016 and beyond.”

Q4 FINANCIAL SUMMARY

During the quarter new sales bookings, net of term extensions, (SNET) grew 10% after adjusting for foreign currency fluctuations. Overall bookings, including term extensions, grew 14% after adjusting for foreign currency fluctuations. This term extension growth was higher than anticipated, which resulted in higher commissions and related selling expenses, resulting in a near-term impact to profit.

GAAP revenue in Q4 was $309 million, up 6% from last year. Excluding incremental contribution from the PAY.ON acquisition and adjusting for foreign currency fluctuations, Q4 revenue increased 7% from the same quarter last year.

Q4 adjusted EBITDA of $115 million grew $8 million, or up 8%, from Q4 2014.

We ended the year with a 60-month backlog of $4.3 billion and a 12-month backlog of $918 million. Excluding incremental PAY.ON contribution and adjusting for foreign currency fluctuations, our 60-month backlog increased $110 million and our 12-month backlog grew $27 million from Q3 2015.

FULL YEAR 2015 FINANCIAL SUMMARY

Full year new sales bookings, net of term extensions (SNET) grew 8% after adjusting for foreign currency fluctuations. Overall bookings, including term extensions, grew 19% to $1.24 billion after adjusting for foreign currency fluctuations.

Full year GAAP revenue was $1.046 billion, up $55 million, or 5% over 2014, after adjusting for foreign currency fluctuations.

Adjusted EBITDA of $260 million was flat with last year. After adjusting for pass through interchange revenues of $130 million and $118 million in 2015 and 2014, respectively, net adjusted EBITDA margin represented 28.4% in 2015 versus 28.9% in 2014. Adjusted EBITDA figures exclude significant transaction-related expenses of $15 million and $23 million in 2015 and 2014, respectively.

GAAP net income for the year was $85 million, or $0.72 per diluted share, up 26% and 24%, respectively. Operating free cash flow for the year was $143 million, up 6% from $134 million in 2014. GAAP cash flow from operations was $183 million, up 23% from last year. As of December 31, 2015, we had $102 million in cash on hand, a debt balance of $939 million, and $138 million remaining under our share repurchase authorization.

2016 GUIDANCE

Excluding contribution from the CFS business, we expect to generate revenue from ongoing operations in a range of $990 million to $1.02 billion in 2016, which represents 4-7% organic growth after adjusting for the PAY.ON acquisition and foreign currency fluctuations. Adjusted EBITDA is expected to be in a range of $265 million to $275 million, which excludes any contribution from the CFS business and approximately $15 million in one-time integration related expenses for PAY.ON, the CFS divestiture, data center and facilities consolidation, and bill payment platform rationalization. We expect to generate between $205 million and $215 million of revenue in the first quarter, which excludes up to $23 million in incremental revenue from the CFS business, depending on transaction close date. We expect full year 2016 net new sales bookings to grow in the upper single digit range.

CONFERENCE CALL TO DISCUSS FINANCIAL RESULTS AND OUTLOOK

Management will host a conference call at 8:30 am ET to discuss these results as well as 2016 guidance. Interested persons may access a real-time audio broadcast of the teleconference at http://investor.aciworldwide.com/ or use the following numbers for dial-in participation: US/Canada: (866) 914-7436, international: +1 (817) 385-9117.    Please provide your name, the conference name ACI Worldwide, Inc. and conference code 51057338. There will be a replay available for two weeks on (855) 859-2056 for US/Canada callers and +1 (404) 537- 3406 for international participants.

About ACI Worldwide

ACI Worldwide, the Universal Payments (UP) company, powers electronic payments for more than 5,000 organizations around the world. More than 1,000 of the largest financial institutions and intermediaries as well as 300 of the leading global retailers rely on ACI to execute $14 trillion each day in payments. In addition, thousands of organizations utilize our electronic bill presentment and payment services. Through our comprehensive suite of software and SaaS-based solutions, we deliver real-time, any-to-any payments capabilities and enable the industry’s most complete omni-channel payments experience. To learn more about ACI, please visit www.aciworldwide.com. You can also find us on Twitter @ACI_Worldwide.

© Copyright ACI Worldwide, Inc. 2015.

For more information contact:

John Kraft, Vice President, Investor Relations & Strategic Analysis

ACI Worldwide

239-403-4627

john.kraft@aciworldwide.com

To supplement our financial results presented on a GAAP basis, we use the non-GAAP measures indicated in the tables, which exclude certain business combination accounting entries related to the acquisition of Online Resources Corporation and significant transaction-related expenses, as well as other significant non-cash expenses such as depreciation, amortization and non-cash compensation, that we believe are helpful in understanding our past financial performance and our future results. The presentation of these non-GAAP financial measures should be considered in addition to our GAAP results and are not intended to be considered in isolation or as a substitute for the financial information prepared and presented in accordance with GAAP. Management generally compensates for limitations in the use of non-GAAP financial measures by relying on comparable GAAP financial measures and providing investors with a reconciliation of non-GAAP financial measures only in addition to and in conjunction with results presented in accordance with GAAP. We believe that these non-GAAP financial measures reflect an additional way to view aspects of our operations that, when viewed with our GAAP results, provide a more complete understanding of factors and trends affecting our business. Certain non-GAAP measures include:

ACI is also presenting operating free cash flow, which is defined as net cash provided by operating activities, plus payments associated with acquired opening balance sheet liabilities, net after-tax payments associated with employee-related actions and facility closures, net after-tax payments associated with significant transaction-related expenses, and less capital expenditures. Operating free cash flow is considered a non-GAAP financial measure as defined by SEC Regulation G. We utilize this non-GAAP financial measure, and believe it is useful to investors, as an indicator of cash flow available for debt repayment and other investing activities, such as capital investments and acquisitions. We utilize operating free cash flow as a further indicator of operating performance and for planning investing activities. Operating free cash flow should be considered in addition to, rather than as a substitute for, net cash provided by operating activities. A limitation of operating free cash flow is that it does not represent the total increase or decrease in the cash balance for the period. This measure also does not exclude mandatory debt service obligations and, therefore, does not represent the residual cash flow available for discretionary expenditures. We believe that operating free cash flow is useful to investors to provide disclosures of our operating results on the same basis as that used by our management.

ACI also includes backlog estimates, which include all license, maintenance, services, and hosting specified in executed contracts, as well as revenues from assumed contract renewals to the extent that we believe recognition of the related revenue will occur within the corresponding backlog period. We have historically included assumed renewals in backlog estimates based upon automatic renewal provisions in the executed contract and our historic experience with customer renewal rates.

Backlog is considered a non-GAAP financial measure as defined by SEC Regulation G. Our 60-month backlog estimate represents expected revenues from existing customers using the following key assumptions:

Estimates of future financial results are inherently unreliable. Our backlog estimates require substantial judgment and are based on a number of assumptions as described above. These assumptions may turn out to be inaccurate or wrong, including, but not limited to, reasons outside of management’s control. For example, our customers may attempt to renegotiate or terminate their contracts for a number of reasons, including mergers, changes in their financial condition, or general changes in economic conditions in the customer’s industry or geographic location, or we may experience delays in the development or delivery of products or services specified in customer contracts which may cause the actual renewal rates and amounts to differ from historical experiences. Changes in foreign currency exchange rates may also impact the amount of revenue actually recognized in future periods. Accordingly, there can be no assurance that contracts included in backlog estimates will actually generate the specified revenues or that the actual revenues will be generated within the corresponding 60-month period.

Backlog should be considered in addition to, rather than as a substitute for, reported revenue and deferred revenue.

Forward-Looking Statements

This press release contains forward-looking statements based on current expectations that involve a number of risks and uncertainties. Generally, forward-looking statements do not relate strictly to historical or current facts and may include words or phrases such as “believes,” “will,” “expects,” “anticipates,” “intends,” and words and phrases of similar impact. The forward-looking statements are made pursuant to safe harbor provisions of the Private Securities Litigation Reform Act of 1995.

Forward-looking statements in this press release include, but are not limited to, statements regarding: (i) expectations regarding our confidence that our recent strategic moves position the Company well for long-term growth; (ii) that we look forward to capitalizing on the acceleration in broad market interest for our payment solutions; (iii) expectations regarding revenue, adjusted EBITDA, net new sales bookings in 2016; (iv) expectations regarding organic revenue growth after adjusting for CFS divestiture; (v) expectations regarding revenue for Q1 2016; and (vi) expectations regarding CFS contribution during the first quarter.

All of the foregoing forward-looking statements are expressly qualified by the risk factors discussed in our filings with the Securities and Exchange Commission. Such factors include, but are not limited to, increased competition, the performance of our strategic product, UP BASE24-eps, demand for our products, restrictions and other financial covenants in our credit facility, consolidations and failures in the financial services industry, customer reluctance to switch to a new vendor, the accuracy of management’s backlog estimates, the maturity of certain products, our strategy to migrate customers to our next generation products, ratable or deferred recognition of certain revenue associated with customer migrations and the maturity of certain of our products, failure to obtain renewals of customer contracts or to obtain such renewals on favorable terms, delay or cancellation of customer projects or inaccurate project completion estimates, volatility and disruption of the capital and credit markets and adverse changes in the global economy, our existing levels of debt, impairment of our goodwill or intangible assets, litigation, future acquisitions, strategic partnerships and investments, risks related to the expected benefits to be achieved in the transaction with PAY.ON, the complexity of our products and services and the risk that they may contain hidden defects or be

subjected to security breaches or viruses, compliance of our products with applicable legislation, governmental regulations and industry standards, our compliance with privacy regulations, the protection of our intellectual property in intellectual property litigation, the cyclical nature of our revenue and earnings and the accuracy of forecasts due to the concentration of revenue-generating activity during the final weeks of each quarter, business interruptions or failure of our information technology and communication systems, our offshore software development activities, risks from operating internationally, including fluctuations in currency exchange rates, exposure to unknown tax liabilities, and volatility in our stock price. For a detailed discussion of these risk factors, parties that are relying on the forward-looking statements should review our filings with the Securities and Exchange Commission, including our most recently filed Annual Report on Form 10-K and our Quarterly Reports on Form 10-Q.

ACI WORLDWIDE, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(unaudited and in thousands, except share and per share amounts)

ACI WORLDWIDE, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

(unaudited and in thousands, except per share amounts)

ACI WORLDWIDE, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited and in thousands)

ACI Worldwide, Inc.

Reconciliation of Selected GAAP Measures to Non-GAAP Measures (1)

(unaudited and in thousands, except per share data)

ACI Worldwide, Inc.

Reconciliation of Selected GAAP Measures to Non-GAAP Measures (1)

(unaudited and in thousands, except per share data)