UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
    
FORM 10-K
x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Fiscal Year Ended December 31, 20142015
OR
¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
Commission file number: 001-35418
EPAM SYSTEMS, INC.
(Exact Name of Registrant as Specified in its Charter)
Delaware 223536104
(State or other jurisdiction of
incorporation or organization)
 
(I.R.S. Employer
Identification No.)
EPAM Systems, Inc.
41 University Drive,
Suite 202
Newtown, Pennsylvania 18940
(Address of principal executive offices, including zip code)
267-759-9000
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
Title of Each Class Name of Each Exchange on Which Registered
Common Stock, par value $0.001 per share New York Stock Exchange
Securities registered pursuant to Section 12(g) of the Act: None.
 Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes   ¨x  No x¨
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  x
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x     No  ¨
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x     No  ¨
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  x
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):
 
Large accelerated filer x  Accelerated filer ¨
    
Non-accelerated filer 
¨ (Do not check if a smaller reporting company)
  Smaller reporting company ¨
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes ¨    No  x
As of June 30, 20142015 the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was approximately $1,589$3,332 million based on the closing sale price as reported on the New York Stock Exchange. Solely for purposes of the foregoing calculation, “affiliates” are deemed to consist of each officer and director of the registrant, and each person known to the registrant to own 10% or more of the outstanding voting power of the registrant.
The number of shares of common stock, $0.001par value, of the registrant outstanding as of February 24, 201510, 2016 was 48,858,03250,370,482 shares.
 DOCUMENTS INCORPORATED BY REFERENCE
The registrant intends to file a definitive Proxy Statement for its 20152016 annual meeting of stockholders pursuant to Regulation 14A within 120 days of the end of the fiscal year ended December 31, 2014.2015. Portions of the registrant’s Proxy Statement are incorporated by reference into Part III of this Form 10-K. With the exception of the portions of the Proxy Statement expressly incorporated by reference, such document shall not be deemed filed with this Form 10-K.
 


 


EPAM SYSTEMS, INC.
FORM 10-K
FOR THE YEAR ENDED DECEMBER 31, 20142015
TABLE OF CONTENTS
 Page
In this annual report, “EPAM,” “EPAM Systems, Inc.,” the “Company,” “we,” “us” and “our” refer to EPAM Systems, Inc. and its consolidated subsidiaries.
“EPAM” is a trademark of EPAM Systems, Inc. “CMMI” is a trademark of the Software Engineering Institute of Carnegie Mellon University. “ISO 9001:2000” and “ISO 27001:2005” are trademarks of the International Organization for Standardization. All other trademarks and servicemarks used herein are the property of their respective owners.
Unless otherwise indicated, information contained in this annual report concerning our industry and the markets in which we operate, including our general expectations and market position, market opportunity and market share, is based on information from various sources (including industry publications, surveys and forecasts and our internal research), on assumptions that we have made, which we believe are reasonable, based on such data and other similar sources and on our knowledge of the markets for our services. The projections, assumptions and estimates of our future performance and the future performance of the industry in which we operate, are subject to a high degree of uncertainty and risk due to a variety of factors, including those described under “Item 1A. Risk Factors” and elsewhere in this annual report. These and other factors could cause results to differ materially from those expressed in the estimates included in this annual report.


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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This annual report on Form 10-K contains estimates and forward-looking statements, principally in “Item 1. Business,” “Item 1A. Risk Factors” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.” Our estimates and forward-looking statements are mainly based on our current expectations and estimates of future events and trends, which affect or may affect our businesses and operations. Although we believe that these estimates and forward-looking statements are based upon reasonable assumptions, they are subject to several risks and uncertainties and are made in light of information currently available to us. Important factors, in addition to the factors described in this annual report, may adversely affect our results as indicated in forward-looking statements. You should read this annual report and the documents that we have filed as exhibits hereto completely and with the understanding that our actual future results may be materially different from what we expect.
The words “may,” “will,” “should,” “could,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “intend,” “potential,” “might,” “would,” “continue” or the negative of these terms or other comparable terminology and similar words are intended to identify estimates and forward-looking statements. Estimates and forward-looking statements speak only as of the date they were made, and, except to the extent required by law, we undertake no obligation to update, to revise or to review any estimate and/or forward-looking statement because of new information, future events or other factors. Estimates and forward-looking statements involve risks and uncertainties and are not guarantees of future performance. As a result of the risks and uncertainties described above, the estimates and forward-looking statements discussed in this annual report might not occur and our future results, level of activity, performance or achievements may differ materially from those expressed in these forward-looking statements due to, including, but not limited to, the factors mentioned above, and the differences may be material and adverse. Because of these uncertainties, you should not place undue reliance on these forward-looking statements. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as may be required under applicable law.

EMERGING GROWTH COMPANY STATUS
In April 2012, several weeks after our initial public offering in February 2012, President Obama signed into law the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). The JOBS Act contains provisions that relax certain requirements for “emerging growth companies” that otherwise apply to larger public companies. For as long as a company retains emerging growth company status, it will not be required to (1) provide an auditor’s attestation report on the Company’s internal control over financial reporting, otherwise required by Section 404(b) of the Sarbanes-Oxley Act of 2002, (2) comply with any new or revised financial accounting standard applicable to public companies until such standard is also applicable to private companies, (3) comply with certain new requirements adopted by the Public Company Accounting Oversight Board, (4) provide certain disclosure regarding executive compensation required of larger public companies or (5) hold shareholder advisory votes on matters relating to executive compensation. Based on our market capitalization on June 30, 2014, we were deemed a large accelerated filer as of December 31, 2014. Therefore, we no longer qualify as an emerging growth company.

    
GEOGRAPHICAL REFERENCES
We use the terms “CIS”, “CEE” and “CEE”“APAC” to describe a portion of our geographic operations and assets. CIS, which stands for the Commonwealth of Independent States, is comprised of constituents of the former U.S.S.R., including Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine and Uzbekistan. CEE, which stands for Central and Eastern Europe, includes Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Republic of Macedonia, Romania, Serbia, Montenegro, Slovakia, and Slovenia. APAC, which stands for Asia Pacific, includes all of Asia (including India) and Australia.

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PART I
Item 1. Business
Company Background
We are a leading global provider of complex software product engineering, technology consulting and digital expertise to clients located around the world, primarily in North America, Europe, Asia and the CIS region. With a strong focus on innovative and scalable software solutions, and information technology services to clients in locations worldwide. Our clients rely on us to deliver a broad rangecontinually evolving mix of software engineering, consulting and IT services, with a significant share of proactive, domain-led, high-value services aimed at improving the client’s ability to innovate and reduce time to market. We draw on our extensive vertical, technology and process expertise andadvanced capabilities, we leverage industry standard and custom developed technology, tools and platforms as well a portfolio of internally and externally developed assets in our delivery.to deliver results for the most complex business challenges. We focus on building long-term partnerships with clients in various industries that demand technologically advanced skills and solutions and require quality and agility in delivery. Our industry expertise includes industries such as software and high technology, bankingfinancial services, media and capital markets, business information and media,entertainment, travel and hospitality, retail, energy, life sciences, healthcare, telecommunications, and government. We deliver services to clients located primarily in North America, Europe, and the CEE region and, beginning in 2014, Asia.
Since our inception in 1993, we have focused on software product development services for major independent software vendors (ISVs) and technology companies and refined this core competency through repeatongoing multi-year engagements. These companies produce advanced software and technology products that demand sophisticated software engineering talent, tools, methodologies and infrastructure to deliver solutions that support functionality and configurability to sustain multiple generations of platform innovation. Software product development for ISVs and technology companies requires high-quality software engineering talent, advanced knowledge of current methodologies and productivity tools, and strong project management practices.infrastructure. As a result, we have developed a culture focused onof innovation, technology leadership and process excellence, which helps us maintain a strong reputation with our clients for technical expertiseproficiency and high-quality project delivery.
Our work with ISVs and technology companies, including both global leaders in enterprise software platforms and emerging innovative technology companies focusing on new trends, exposes us to their customers’strategic business and strategic challenges in various industries, allowing us to develop vertical-specific domain expertise. Unlike custom application development which is tailored to specific business requirements, ISVs’ software products of ISVs must be designed with a higher level of product configurability and operational performance to address the needs of a diverse set of end-users working in multiple industries and operating in a variety of deployment environments. In-depthThis in-depth understanding of how vertically-oriented ISVs and technology companies solve their clients’ challenges allows us to focus and grow our business in multiple industry verticals, predominantly Banking and Financial Services, Business InformationMedia and Media,Entertainment, and Travel and Consumer.
Our historical core competency is full lifecycle software development and product engineering services including design and prototyping, product development and testing, component design and integration, product deployment, performance tuning, porting and cross-platform migration. Our extensiveThis experience in each of these areas created an unparalleleda foundation for the evolution of our other offerings, which include custom application development, application testing,advanced technology software solutions, intelligent enterprise application platforms, application maintenanceservices and support, and infrastructure management.digital engagement.
In 2014, we completed severalOur strategic acquisitions allowed us to further expand our global footprint and service offering.offering portfolio. Our 2014 acquisitions of Netsoft Holdings, LLC, Joint Technology Development Limited, GGA Software Services, LLC and Great Fridays Ltd. expanded our capabilities in the healthcare, financial services and digital design areas. Our 2015 acquisitions of NavigationArts, Inc and Alliance Consulting Global Holdings, Inc. enhanced our abilities in digital strategy, consulting and test automation, increasing our reach in many of our existing verticals as well as establishing our presence in India. We expect these strategic acquisitions will enable us to offer a widerbroader range of services to our clients from a wider variety of locations. We added approximately 761 IT, design professionals and scientists to our employee base through these acquisitions in 2014.
Our Approach
Our delivery centers in Belarus, Ukraine, Russia, Hungary, Kazakhstan, Bulgaria, Armenia, Poland and China are strategically located in centers of software engineering talent and educational excellence.
We believe the quality of our employees underpins our success and serves as a key point of differentiation in how we deliver a superior value proposition to our clients. Our highly-skilled information technology, or IT professionals, combined with our extensive experience in delivering custom solutions that meet our clients’ pressing business needs, has allowed us to develop a deep culture of software engineering excellence. We believe this culture enables us to attract, train and retain talented IT professionals.

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We employ highly-educated IT professionals, nearly all of whom hold a master’s equivalent university degree in math, science or engineering and are generally proficient in English. To ensure we attract the best candidates from this deep talent pool, we have developed close relationships with leading universities across CEE, whereby we actively support curriculum development and engage students to identify their talents and interests. We continue to expand these efforts throughout the major talent hubs within CEE.
Since inception, we have invested significant resources into developing a proprietary suite of internal applications and tools to manage all aspects of our delivery process. These applications and tools are effective in reducing risks, such as security breaches and cost overruns, while providing control and visibility across all project lifecycle stages to both our clients and us. In addition, these applications and tools enable us to provide solutions using the optimal software product development methodologies, including iterative methodologies such as Agile development. Our applications, tools, methodologies and infrastructure allow us to seamlessly deliver services and solutions from our delivery centers to global clients, thereby further strengthening our relationships with them.
We believe we are the only ISAE 3402 Type 2 certified IT services provider with multiple delivery centers in CEE, based on our analysis of publicly available information of IT services providers. This certification is a widely recognized auditing standard developed by the American Institute of Certified Public Accountants, or AICPA, and it serves as additional assurance to our clients regarding the control environment and the security of their sensitive data. Furthermore, this is an important certification for firms in data and information-intensive industries, as well as any organization that is subject to the internal controls certification requirements of the Sarbanes-Oxley Act of 2002, as amended, or the Sarbanes-Oxley Act. Our ISAE 3402 Type 2 certification, in addition to our multiple ISO/IEC 27001:2005 and ISO 9001:2008 attestations, underscores our focus on establishing stringent security standards and internal controls.
Our clients primarily consist of Forbes Global 2000 corporations located in North America, Europe and the CIS. We maintain a geographically diverse client base with 50.4% of our 2014 revenues from clients located in North America, 39.0% from clients in Europe, 7.6% from clients in the CIS and 1.8% from our clients in APAC. Our focus on delivering quality to our clients is reflected by an average of 93.1% and 81.5% of our revenues in 2014 coming from clients that had used our services for at least one and two years, respectively. In addition, we have significantly grown the size of existing accounts. For example, from 2008 to 2014, the number of clients accounting for over $5.0 million in annual revenues increased from seven to 24, and those accounting for $1.0 million or more in revenues increased from 42 to 116.
Our Services
Our service offerings cover the full software and product development lifecycle from digital strategy and customer experience design to enterprise application platforms implementation and program management services and from complex software development services to maintenance, support, custom application development, application testing, and infrastructure management. Our key service offerings include:
Software Product Development Services
We provide a comprehensive set of software product development services including product research, customer experience design and prototyping, program management, component design and integration, full lifecycle software testing, product deployment and end-user customization, performance tuning, product support and maintenance, managed services, as well as porting and cross-platform migration. We focus on software products covering a wide range of business applications as well as product development for multiple mobile platforms and embedded software product services.

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Custom Application Development Services
We offer complete custom application development services to meet the requirements of businesses with sophisticated application development needs not adequately supported by packaged applications or by existing custom solutions. Our custom application development services leverage our experience in software product development as well as our industry expertise, prebuilt application solution frameworks and specific software product assets. Our range of services includes business and technical requirements analysis, user experience design, solution architecture creation and validation, development, component design and integration, quality assurance and testing, deployment, performance tuning, support and maintenance, legacy applications re-engineering/refactoring, porting and cross-platform migration and documentation.
Application Testing Services
We maintain a dedicated group of testing and quality assurance professionals with experience across a wide range of technology platforms and industry verticals. Our Quality Management System complies with global quality standards such as ISO 9001:2008 and we employ industry-recognized and proprietary defect tracking tools to deliver a comprehensive range of

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testing services. Our application testing services include: (i) software application testing, including test automation tools and frameworks; (ii) testing for enterprise IT, including test management, automation, functional and non-functional testing, as well as defect management; and (iii) consulting services focused on helping clients improve their existing software testing and quality assurance practices.
Enterprise Application Platforms
As a proven provider of software product development services to major ISVs, we have participated in the development of industry standard technology and business application platforms and their components in such specific areas as customer relationship management and sales automation, enterprise resource planning, enterprise content management, business intelligence, e-commerce, mobile, Software-as-a-Service and cloud deployment. Our experience in such areas allows us to offer services around Enterprise Application Platforms, which include requirements analysis and platform selection, deep and complex customization, cross-platform migration, implementation and integration, as well as support and maintenance. We use our experience, custom tools and specialized knowledge to integrate our clients’ chosen application platforms with their internal systems and processes and to create custom solutions filling the gaps in their platforms’ functionality necessary to address the needs of the clients’ users and customers.
Application Maintenance and Support
We deliver application maintenance and support services through a dedicated team of IT professionals. Our application maintenance and support offerings meet rigorous CMMI and ISAE 3402 Type 2 requirements. Our clients benefit from our proprietary distributed project management processes and tools, which reduce the time and costs related to maintenance, enhancement and support activities. Our services include incident management, fault investigation diagnosis, work-around provision, application bug fixes, release management, application enhancements and third-party maintenance.
Infrastructure Management Services
Given the increased need for tighter enterprise integration between software development, testing and maintenance with private, public and mobile infrastructures, our service offerings also cover infrastructure management services. We have significant expertise in implementing large infrastructure monitoring solutions, providing real-time notification and control from the low-level infrastructure up to and including applications. Our ISAE 3402 Type 2, ISO/IEC 27001:2005 and ISO 9001:2008 certifications provide our clients with third-party verification of our information security policies. Our solutions cover the full lifecycle of infrastructure management including application, database, network, server, storage and systems operations management, as well as incident notification and resolution.
We also work closely with leading companies in other industries to enable our clients to better leverage technology and address simultaneous pressures of driving value for the consumer and offering a more engaging experience. Our digital strategy and experience design practice provides strategy, design, creative, and program management services for clients looking to improve their customer experience. In 2014 and 2015, we expanded our digital design capabilities through strategic acquisitions in the U.K. and U.S. We also offer deep expertise across several domains including business-to-business and business-to-consumer e-commerce, customer/partner self-service, employee portals, online merchandising and sales, web content management, mobile solutions and billing.



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Our Vertical Markets
Strong vertical-specific domain knowledge, backed by extensive experience merging technology with the business processes of our clients, allows us to deliver tailored solutions to various industry verticals. We have categorized our customers into fourfive main industry verticals as follows:          and a group of emerging verticals.
Independent Software Vendors (ISVs)Financial Services. We have significant experience working with global investment banks, firms, and Technology;brokerages; commercial and retail banks, credit card companies, depositories, corporate treasuries, pension funds, and market data providers. We assist these clients with challenges stemming from new regulations, compliance requirements, and risk management. We have established a Capital Markets Competency Center, which facilitates knowledge exchange, education and collaboration across our organization and develops new software products, frameworks and components to further enhance our financial services solutions and services.
Banking and Financial Services;
Business Information and Media; and
Travel and Consumer.
We also Our capabilities span a range of platforms, applications and solutions that businesses in travel and hospitality use to serve their customers, capture management efficiencies, control operating expenses and grow revenues. Many of the diverse technology needs of clientsworld’s leading airlines, hotel providers and travel agencies rely on our knowledge in creating the energy, telecommunications, automotive, manufacturing, insurance, retail, healthcarebest tools for operating and life sciences industries and the government. These industries comprise our Other vertical.

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The following table sets forth our revenues by vertical by amount and as a percentage of our revenues for the periods presented:
 For the Years Ended December 31,
 2014 2013 2012
Banking and Financial Services$215,425
 29.5% $156,340
 28.2% $111,941
 25.8%
ISVs and Technology157,944
 21.6
 134,970
 24.3
 106,852
 24.6
Travel and Consumer157,756
 21.6
 117,248
 21.1
 95,965
 22.1
Business Information and Media91,726
 12.6
 75,677
 13.6
 62,398
 14.4
Other98,766
 13.5
 63,256
 11.4
 50,226
 11.6
Reimbursable expenses and other revenues8,410
 1.2
 7,626
 1.4
 6,417
 1.5
Revenues$730,027
 100.0% $555,117
 100.0% $433,799
 100.0%
managing their business.
ISVsSoftware and Technology.Hi-Tech. Since our inception, we have focused onOur core competency is in providing complex software product development services to meet ISVs and technology companies’ constant need for innovation and rapid time-to-market. Through our experience with many industry leaders, we have developed rigorous standards for software product development, as well as proprietary internal processes, methodologies and IT infrastructure. Our services span the complete software development lifecycle for software product development using our comprehensive development methodologies, testing and performance tuning, deployment and maintenance and support. In addition, we are establishing close partner relationships with many of our ISV and technology company clients and are offering distributed professional services around their product offerings directly to our corporate clients.
BankingMedia and Financial Services. We have significant experience working with global retail and investment banks, investment firms, depositories, corporate treasuries, pension funds and market data providers. We offer a broad portfolio of services in asset and wealth management, corporate and retail banking, cards and payments, investment banking and brokerage, research and analysis, as well as governance, risk and compliance. We have also established a Capital Markets Competency Center, which facilitates knowledge exchange, education and collaboration across our organization and develops new software products, frameworks and components to further enhance our industry-specific solutions and services.
Business Information and Media.Entertainment. We have established long-term relationships with leading business informationmedia and mediaentertainment companies, which enable us to bring sustainable value creation and enhanced return-on-content for organizations within this vertical. Our solutions help clients develop new revenue sources, accelerate the creation, collection, packaging and management of content and reach broader audiences. We serve clients in a range of business information and media sub-sectors, including entertainment media, news providers, broadcasting companies, financial information providers, content distributors and advertising networks. Our Business Information Competency Center enables us to provide our clients with solutions that help them overcome challenges related to operating legacy systems, manage varied content formats, rationalize their online assets and lower their cost of delivery. In addition, we provide knowledge discovery platform services through our InfoNgen business, which combines custom taxonomy development with web crawling, internal file and e-mail classification, newsletter and feed publication and content trend analysis.
TravelLife Sciences and Consumer.Healthcare. We have extensivehelp our customers in the Life Sciences and Healthcare industry address ever changing market conditions and regulatory environments. Our professionals deliver end-to-end experience in designing, implementingthat includes strategy, architecture, build and supportingmanaged services to clients ranging from the traditional healthcare providers to innovative startups. We work with global Life Sciences companies to deliver sophisticated scientific informatics and innovative enterprise technology solutions. We offer a combination of deep scientific and mathematical knowledge providing global coverage for broad-based initiatives. Our solutions for the travelenable clients to speed research, discovery, and hospitality industry. This has led to the development of a substantial repository oftime-to-market while improving collaboration, knowledge componentsmanagement, and solutions, such as our Loyalty, Marketing and Booking Engine frameworks, which results in accelerated development and implementation of solutions, while ensuring enterprise-class reliability. Our capabilities span a range of platforms, applications and solutions that businesses in travel and hospitality use to serve their customers, capture management efficiencies, control operating expenses and grow revenues.operational excellence.
We also work closely with leading companiesserve the diverse technology needs of clients in the otherenergy, telecommunications, automotive, manufacturing, insurance, retail industries to enableand the government. These industries represent our Emerging verticals.
Our revenues by vertical for the periods presented are as follows:
 Year Ended December 31,
 2015 2014 2013
Financial Services$248,526
 27.2% $215,425
 29.5% $156,340
 28.2%
Travel and Consumer215,303
 23.6
 157,756
 21.6
 117,248
 21.1
Software & Hi-Tech192,989
 21.1
 157,944
 21.6
 134,970
 24.3
Media & Entertainment120,616
 13.2
 91,726
 12.6
 75,677
 13.6
Life Sciences and Healthcare73,327
 8.0
 42,428
 5.8
 14,079
 2.5
Emerging Verticals53,856
 5.9
 56,338
 7.7
 49,177
 8.9
Reimbursable expenses and other revenues9,511
 1.0
 8,410
 1.2
 7,626
 1.4
Revenues$914,128
 100.0% $730,027
 100.0% $555,117
 100.0%

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Clients
Our clients primarily consist of Forbes Global 2000 corporations located in North America, Europe, Asia and the CIS. We maintain a geographically diverse client base with 53.1% of our 2015 revenues from clients located in North America, 38.6% from clients in Europe, 4.7% from clients in the CIS and 2.6% from our clients in APAC. We typically enter into master services agreements with our clients, which provide a framework for services that is then supplemented by statements of work, which specify the particulars of each individual engagement, including the services to better leverage technologybe performed, pricing terms and address simultaneous pressuresperformance criteria.
Our focus on delivering quality to our clients is reflected by an average of driving value95.1% and 84.3% of our revenues in 2015 coming from clients that had used our services for at least one and two years, respectively. In addition, we have significantly grown the size of existing accounts as majority of our top client mix remains consistent over the years. The annual revenue from our top five clients increased from $65.9 million in 2010 to $298.1 million in 2015 and the annual revenue from our top ten clients increased from $94.5 million in 2010 to $400.3 million in 2015.
During 2015 and 2014, one customer, UBS AG, accounted for over 10% of our revenues. No customer accounted for over 10% of our revenues in 2013.
The following table presents the percentage of our revenues by client location:
 % of Revenues for Year Ended December 31,
 Client location
2015 2014 2013
North America53.1% 50.4% 50.8%
Europe38.6
 39.0
 36.1
CIS4.7
 7.6
 11.7
APAC2.6
 1.8
 
Reimbursable expenses and other revenues1.0
 1.2
 1.4
Revenues100.0% 100.0% 100.0%
Revenues by client location above differ from our segment information. Our operations consist of four reportable segments: North America, Europe, Russia and Other. This determination is based on the unique business practices and market specifics of each region and that each region engages in business activities from which it earns revenues and incurs expenses. Our reportable segments are based on managerial responsibility for a particular client. Because managerial responsibility for a particular client relationship generally correlates with the client’s geographic location, there is a high degree of similarity between client locations and the geographic boundaries of our reportable segments. In some specific cases, however, managerial responsibility for a particular client is assigned to a management team in another region, usually based on the strength of the relationship between client executives and particular members of our senior management team. In such a case, the client’s activity would be reported through the management team’s reportable segment. Particularly, our acquired clients in the APAC region are reported as part of the Europe segment based on the managerial responsibility for those clients. The following table presents the percentage of our revenues by reportable segment:
 % of Segment Revenues for Year Ended December 31,
 Segment
2015 2014 2013
North America51.5% 51.3% 51.3%
Europe43.8
 41.0
 36.8
Russia4.2
 6.9
 10.0
Other0.5
 0.8
 1.9
Segment Revenues100.0% 100.0% 100.0%
See “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II of this annual report for additional information regarding segments.

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The following table shows the distribution of our clients by revenues for the consumerperiods presented:
 Year Ended December 31,
Revenues Greater Than or Equal To2015 2014 2013
$0.1 million365 306 263
$0.5 million211 181 147
$1 million136 116 95
$5 million33 24 22
$10 million14 12 12
$20 million7 6 4
See Note 17 in the notes to our consolidated financial statements in this Annual Report on Form 10-K for information regarding total assets, operating results and offeringother financial information regarding our operating segments.
Sales and Marketing
Our sales and marketing efforts support our business strategy to increase our revenues from new and existing clients through our senior management, sales and business development staff, account managers, and technical specialists. We maintain a more engaging experience. Our expertise allows usdedicated sales force and a marketing team, which coordinates corporate-level branding efforts such as sponsorship of programming competitions to integrateparticipation in and hosting of industry conferences and events.
Given our services withfocus on providing technical solutions to our clients’ complex challenges, our IT professionals play an integral role in engaging with clients on potential business opportunities. Our account managers maintain direct client relationships and are tasked with identifying new business opportunities and responding to requests-for-proposals, or RFPs. Account managers typically engage technical and other specialists when pursuing opportunities. This sales model has been effective in promoting repeated business and growth from within our existing enterprise resource planning, billing fulfillment and customer relationshipclient base.
In addition to effective client management, solutions. Our digital strategy and experience design practice, EPAM Empathy Lab, provides strategy, design, creative, and program management services for clients looking to improve their customer experience. In 2014, we addedbelieve that our reputation as a UK-based digital design presence through our acquisitionpremium provider of Great Fridays Limited. We also offer deep expertise across several domains including business-to-business and business-to-consumer e-commerce, customer/partner self-service, employee portals, online merchandising and sales, web content management, mobilesoftware engineering solutions and billing.information technology services drives additional business from inbound requests, referrals and RFPs. We enjoy published recognition from third-party industry observers, such as Forrester Research, Forbes Research, Everest Group, Zinnov, CIO Magazine, Information Week, and Software Magazine.

Human Capital
Attracting and retaining employees is a key factor in our ability to grow our revenues and meet our clients’ needs. We have dedicated full-time employees that oversee all aspects of our human capital management process. We effectively plan our short-term and long-term recruitment needs and deploy the necessary personnel and processes to optimize utilization and to quickly satisfy the demands of our clients. As our business grows, we also focus on hiring and retaining individuals with appropriate skills to fill our executive, finance, legal, HR and other key management positions.
At December 31, 2015, 2014 and 2013, we had a total of 18,354, 14,109 and 11,056 employees, respectively. Of these employees, as of December 31, 2015, 2014 and 2013, respectively, 16,078, 11,824 and 9,340 were revenue generating IT professionals.
In our competitive industry, the ability to hire and retain highly-skilled information technology professionals is critical to our success. We believe the quality of our employees serves as a key point of differentiation in how we deliver a superior value proposition to our clients. To attract, retain and motivate our IT professionals, we offer a challenging work environment, ongoing skills development initiatives, attractive career advancement and promotion opportunities thus providing an environment and culture that rewards entrepreneurial initiative and performance.
Historically, we have developed our base of IT professionals by hiring highly-qualified, experienced IT professionals from the CIS and CEE region and by recruiting students from leading universities there. The quality and academic prestige of the CIS and CEE educational system is renowned worldwide. We have strong relationships with the leading institutions in these geographies, such as the Belarusian State University, Belarusian State University of Informatics and Radioelectronics, the Saint Petersburg State University of Information Technologies, Mechanics and Optics, the Moscow State University, the Moscow Institute of Physics & Technology, the Moscow State University of Instrument Engineering and Computer Sciences and the National Technical University of Ukraine. The participants from these universities are frequent and consistent winners in the ACM International Collegiate Programming Contest (“ICPC”), the oldest, largest, and most prestigious programming contest in

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the world. In the 2015 ACM International Collegiate Programming Contest, the two top winning spots were awarded to the CIS schools and a highly regarded Belarusian university finished in the top 15.
We have established EPAM delivery centers near many of these university campuses. Our ongoing involvement with these universities includes supporting EPAM-branded research labs, developing training courses, providing teaching equipment, actively supporting curriculum development and engaging students to identify their talents and interests. Our relationships with these technical institutions provide us access to a highly-qualified talent pool of programmers, and allow us to consistently attract highly-skilled students from these institutions. We also conduct lateral hiring through a dedicated IT professional talent acquisition team whose objective is to locate and attract qualified and experienced IT professionals within the region and other EPAM locations.
We believe that we maintain a good working relationship with our employees and our employees have not entered into any collective bargaining agreements or engaged in any labor disputes.

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Our Delivery Model
We have delivery centers located in Belarus, Ukraine, Russia, Hungary, Kazakhstan, Bulgaria, Armenia, Poland, China, Mexico, Austria, Czech Republic and China.India. We have client management locations in the United States, Canada, United Kingdom, Germany, Sweden, Switzerland, Netherlands, Russia, Kazakhstan, Singapore, Hong Kong and Australia. We believe the development of a robust global delivery model creates a key competitive advantage, enabling us to better understand and meet our client’sclients’ diverse needs and provide a compelling value proposition. We continuously grow our delivery platform both organically and through acquired delivery centers and client management locations. Our total headcount of revenue generating personnel was 16,078 as of December 31, 2015.
Our primary delivery centers are located in Belarus, where we have 4,1945,207 IT professionals as of December 31, 2014.2015. The majority of these IT professionals are located in Minsk, the capital of Belarus, which is a major educational and industrial center in CEE. Minsk is well-positioned to serve as a prime IT outsourcing destination given its strong industrial base, good educational infrastructure and legacy as the center of computer science for the former Soviet Union. Furthermore, the IT industry in Belarus has been strongly supported by the government, which has taken steps to encourage investment in the IT sector through long-term tax incentives.
Our delivery centers in Ukraine have 2,9563,734 IT professionals as of December 31, 2014.2015. Our delivery centers in Russia have 1,7142,235 IT professionals as of December 31, 2014.2015. Our locations in Ukraine and Russia offer many of the same benefits as Belarus, including educational infrastructure, availability of qualified software engineers and government support of the IT industry. We believe our locations in Ukraine and Russia, along with our delivery centers in Belarus, offer a strong and diversified delivery platform across CEE.Europe. Our business has not been materially affected by the political and economic uncertainty in Russian or Ukraine to date.
Our other significant delivery centers are in the United States with 1,016 IT professionals, Hungary have 1,013with 1,151 IT professionals and India with 1,031 IT professionals as of December 31, 2014, and2015. These delivery centers are located strategically to serve as the center for our nearshore delivery capabilities to European clients. Hungary’s geographic proximity, cultural affinity and similar time zones with our clients in North America, Europe enables increased interaction that creates closer client relationships, increased responsiveness and more efficientAsia. The delivery center in India has been established through our business combination with Alliance Consulting Global Holdings, Inc.
Training and Development
We dedicate significant resources to the training and development of our solutions.IT professionals. We believe in the importance of supporting educational initiatives and we sponsor employees’ participation in internal and external training and certifications. Furthermore, we actively pursue partner engagements with technical institutions in CEE.
We provide training, continuing education and career development programs for both entry-level and experienced IT professionals. Entry-level IT professionals undergo a rigorous training program that consists of approximately three to six months of classroom training, as well as numerous hours of hands-on training through actual engagements. This comprehensive program results in employees who are highly proficient and possess deep technical expertise that enables them to immediately serve our clients’ needs. For our mid-level and senior IT professionals, we offer continuing education programs aimed at helping them advance in their careers. We also provide mentoring opportunities, management and soft skills training, intensive workshops and management and technical advancement programs. We are committed to systematically identifying and nurturing the development of middle and senior management through formal leadership training, evaluation, development and promotion.
Quality and Process Management
WeOver the years we have built complexinvested significant resources into developing a proprietary suite of internal applications and tools to manage quality,all aspects of our delivery process. These applications and tools are effective in reducing costs and security risks, while providing control and transparency of the delivery process in a distributed environment. visibility across all project lifecycle stages both internally and to our clients. In addition, these applications, tools, methodologies and infrastructure allow us to seamlessly deliver services and solutions to global clients, further strengthening our relationships with them.
Our proprietary ISO 9001:2008 and CMMI-certified Quality Management System has been documented, implemented and maintained to ensure the timely delivery of software development services to our clients. We have also developed sophisticated project management techniques facilitated through our Project Management Center, a web-based collaborative environment for software development, which we consider critical to meeting or exceeding the service levels required by our clients.

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Our Quality Management System ensures that we provide timely delivery of software development services to enhance client satisfaction by enabling:
objective valuation of the performed process, work products and services against the client’s process descriptions, standards and procedures;
identification, documentation and timely resolution of noncompliance issues;
feedback to the client’s project staff and managers on the results of quality assurance activities;
monitoring and improvement of the software development process to ensure adopted standards and procedures are implemented and flaws are detected and resolved in a timely manner; and
execution of planned and systematic problem prevention activities.
Our proprietary Project Management Center supports our software development delivery model. Our Project Management Center is effective in reducing risks and providing control and visibility across all project lifecycle stages based on the following features:
multi-site, multi-project capabilities;
activity-based software development lifecycle, which fully tracks the software development activities through the project documentation;
project, role-based access control, which can be available to us, clients and third parties;
fully configurable workflow engine with built-in notification and messaging;
extensive reporting capabilities and tracking of key performance indicators; and
integration with Microsoft Project and Outlook.

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The transparency and visibility into software development project deliverables, resource management, team messaging and project-related documents and files provided by our Project Management Center promotes collaboration and strengthens our relationships with our clients. Improved traceability enables significant time savings and cost reductions for business users and IT management during change management for the software development lifecycle. The combination of our Project Management Center with our other proprietary internal applications enhances our offering by reducing errors, increasing quality, effectiveness and oversight, and improving maintenance time. Combining applications can lead
Based on our analysis of publicly available information of IT services providers, we are the only ISAE 3402 Type 2 certified IT services provider with multiple delivery centers in CEE. This certification is a widely recognized auditing standard developed by the American Institute of Certified Public Accountants, or AICPA, and it serves as additional assurance to more efficient communicationsour clients regarding the control environment and oversightthe security of their sensitive data. Furthermore, this is an important certification for both clientsfirms in data and information-intensive industries, as well as any organization that is subject to the internal controls certification requirements of the Sarbanes-Oxley Act of 2002, as amended, or the Sarbanes-Oxley Act. Our ISAE 3402 Type 2 certification, in addition to our staff.
Salesmultiple ISO/IEC 27001:2005 and Marketing
Our sales and marketing strategy seeks to increase our revenues from new and existing clients through our account managers, sales and business development managers, vertical specialists, technical specialists and subject-matter experts. GivenISO 9001:2008 attestations, underscores our focus on complex application developmentestablishing stringent security standards and the needs of our clients, we believe our IT professionals play an integral role in engaging with clients on potential business opportunities.
Our account managers are organized vertically and maintain direct client relationships. They are responsible for handling inbound requests and referrals, identifying new business opportunities and responding to requests-for-proposals, or RFPs. Account managers typically engage technical and other specialists in responding to RFPs and pursuing opportunities. This sales model has been effective in promoting repeated business and growth from within our existing client base. In addition to effective client management, we believe that our reputation as a premium provider of software engineering solutions and information technology services drives additional business from inbound requests, referrals and RFPs. We enjoy published recognition from third-party industry observers, such as Forrester Research, Forbes Research, Everest Group, Zinnov, CIO Magazine, Information Week, and Software Magazine.
We also maintain a dedicated sales force as well as a marketing team, which coordinates corporate-level branding efforts that range from sponsorship of programming competitions to participation in and hosting of industry conferences and events.
Clients
Our clients primarily consist of Forbes Global 2000 corporations. During 2014, one customer, UBS AG, accounted for over 10% of our revenues. No customer accounted for over 10% of our revenues in 2013 or 2012.
The following table presents the percentage of our revenues by client location:
 % of Revenues for Year Ended December 31,
 Client location
2014 2013 2012
North America50.4% 50.8% 47.7%
Europe39.0
 36.1
 35.8
CIS7.6
 11.7
 15.0
APAC1.8
 
 
Reimbursable expenses and other revenues1.2
 1.4
 1.5
Revenues100.0% 100.0% 100.0%
Revenues by client location above differ from our segment information. Our operations consist of four reportable segments: North America, Europe, Russia and Other. This determination is based on the unique business practices and market specifics of each region and that each region engages in business activities from which it earns revenues and incurs expenses. Our reportable segments are based on managerial responsibility for a particular client. Because managerial responsibility for a particular client relationship generally correlates with the client’s geographic location, there is a high degree of similarity between client locations and the geographic boundaries of our reportable segments. In some specific cases, however, managerial responsibility for a particular client is assigned to a management team in another region, usually based on the strength of the relationship between client executives and particular members of our senior management team. In such case, the client’s activity would be reported through the reportable segment. Particularly, our newly acquired clients in the APAC region are reported as part of the Europe segment based on the managerial responsibility for those clients. The following table presents

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the percentage of our revenues by reportable segment:
 % of Segment Revenues for Year Ended December 31,
 Segment
2014 2013 2012
North America51.3% 51.3% 45.5%
Europe41.0
 36.8
 38.9
Russia6.9
 10.0
 11.7
Other0.8
 1.9
 3.9
Segment Revenues100.0% 100.0% 100.0%
The following table sets forth the percentage of our revenues by client vertical for the periods presented:
 % of Revenues for Year Ended December 31,
 Vertical
2014 2013 2012
Banking and Financial Services29.5% 28.2% 25.8%
ISVs and Technology21.6
 24.3
 24.6
Travel and Consumer21.6
 21.1
 22.1
Business Information and Media12.6
 13.6
 14.4
Other13.5
 11.4
 11.6
Reimbursable expenses and other revenues1.2
 1.4
 1.5
Revenues100.0% 100.0% 100.0%
The following table shows the distribution of our clients by revenues for the periods presented:
 Year Ended December 31,
Revenues Greater Than or Equal To2014 2013 2012
$0.1 million306 263 216
$0.5 million181 147 114
$1 million116 95 81
$5 million24 22 16
$10 million12 12 7
$20 million6 4 4
See Note 18 in the notes to our consolidated financial statements in this Annual Report on Form 10-K for information regarding total assets, operating results and other financial information regarding our operating segments.
We typically enter into master services agreements with our clients, which provide a framework for services that is then supplemented by statements of work, which specify the particulars of each individual engagement, including the services to be performed, pricing terms and performance criteria.internal controls.
Competition
The markets in which we compete are changing rapidly and we face competition from both global IT servicestechnology solutions providers as well as those based primarily in specific geographies with lower cost labor such as CEE, India China and other geographies.China. We believe that the principal competitive factors in our business include technical expertise and industry knowledge, end-to-end solution offerings, reputation and track record for high-quality and on-time delivery of work, effective employee recruiting, training and retention, responsiveness to clients’ business needs, scale, financial stability and price.
We face competition primarily from:
India-based technology outsourcing IT services providers, such as Cognizant Technology Solutions (NASDAQ:CTSH), Luxoft Holding, Inc. (NYSE:LXFT), GlobalLogic, HCL Technologies, Infosys Technologies (NASDAQ:INFY), Mindtree, Sapient (NASDAQ:SAPE), Symphony Technology Group, Tata Consultancy Services and Wipro (NASDAQ:WIT);

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Local CEE technology outsourcing IT services providers;providers such as Luxoft Holding, Inc. (NYSE:LXFT);
Large global consulting and outsourcing firms, such as Accenture, Atos Origin, Capgemini, CSC and IBM;
China-based technology outsourcing IT services providers such as Camelot Information Services, and Pactera; and
In-house IT departments of our clients and potential clients.
We believe that our focus on complex software product development solutions, our technical employee base, and the development and continuous improvement in process methodologies, applications and tools position us well to compete

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effectively in the future. However, we face competition from offshore IT services providers in other outsourcing destinations with low wage costs, such as India and China. Our present and potential competitors may also have substantially greater financial, marketing or technical resources; may also be able to respond more quickly to new technologies or processes and changes in client demands; may be able to devote greater resources towards the development, promotion and sale of their services than we can; and may also make strategic acquisitions or establish cooperative relationships among themselves or with third parties that increase their ability to address the needs of our clients.
Human Capital
Our people are critical to the success of our business. Attracting and retaining employees is a key factor in our ability to grow our revenues and meet our clients’ needs. At December 31, 2014, 2013 and 2012, we employed 14,109, 11,056 and 10,043 professionals, respectively. Of these employees, approximately 86.0% were located in the CIS and CEE, 5.5% were located in Western Europe (excluding Hungary), 6.3% were located in North America and 2.1% were located in Asia at December 31, 2014. We believe that we maintain a good working relationship with our employees and we have not experienced any labor disputes. Our employees have not entered into any collective bargaining agreements.
Recruitment and Retention
We have dedicated full-time employees that oversee all aspects of our human capital management process. Through our proprietary internal tools, we effectively plan our short-term and long-term recruitment needs and deploy the necessary personnel and processes to optimize utilization and to quickly satisfy the demands of our clients. We believe our company culture and reputation enhances our ability to recruit and retain highly sought-after employees, particularly in CIS and CEE.
Historically, we have developed our base of IT professionals by hiring highly-qualified, experienced IT professionals from the CIS and CEE region and by recruiting students from leading universities there. The quality and academic prestige of the CIS and CEE educational system is renowned world-wide. We have strong relationships with the leading institutions in these geographies, such as the Belarusian State University, Belarusian State University of Informatics and Radioelectronics, the Saint Petersburg State University of Information Technologies, Mechanics and Optics, the Moscow State University, the Moscow Institute of Physics & Technology, the Moscow State University of Instrument Engineering and Computer Sciences and the National Technical University of Ukraine. The participants from these universities are frequent and consistent winners in the ACM International Collegiate Programming Contest (ICPC), the oldest, largest, and most prestigious programming contest in the world. In the 2014 ACM International Collegiate Programming Contest (“ICPC,”) seven out of twelve top ranked finishers were from CEE, and a top Belarusian university finished in the top 13.
We have established EPAM delivery centers near many of these university campuses. Our ongoing involvement with these universities includes supporting EPAM-branded research labs, developing training courses, providing teaching equipment, actively supporting curriculum development and engaging students to identify their talents and interests. Our relationships with these technical institutions provide us access to a highly-qualified talent pool of programmers, and allow us to consistently attract highly-skilled students from these institutions. We also conduct lateral hiring through a dedicated IT professional talent acquisition team whose objective is to locate and attract qualified and experienced IT professionals within the region.
To attract, retain and motivate our IT professionals, we seek to provide an environment and culture that rewards entrepreneurial initiative and performance. In addition, we offer a challenging work environment, ongoing skills development initiatives and attractive career advancement and promotion opportunities.
Training and Development
We dedicate significant resources to the training and development of our IT professionals. We believe in the importance of supporting educational initiatives and we sponsor employees’ participation in internal and external training and certifications. Furthermore, we actively pursue partner engagements with technical institutions in CEE.
We provide training, continuing education and career development programs for both entry-level and experienced IT professionals. Entry-level IT professionals undergo a rigorous training program that consists of approximately three to six

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months of classroom training, as well as numerous hours of hands-on training through actual engagements. This comprehensive program results in employees who are highly proficient and possess deep technical expertise that enables them to immediately serve our clients’ needs. For our mid-level and senior IT professionals, we offer continuing education programs aimed at helping them advance in their careers. We also provide mentoring opportunities, management and soft skills training, intensive workshops and management and technical advancement programs. We are committed to systematically identifying and nurturing the development of middle and senior management through formal leadership training, evaluation, development and promotion.
Intellectual Property
OurProtecting our intellectual property rights are importantis critical to our business. We have invested, and will continue to invest, in research and development to enhance our domain knowledge and create complex, specialized solutions for our clients. We rely on a combination of intellectual property laws, trade secrets, confidentiality procedures and contractual provisions to protect our intellectual property. We require our employees, vendors and independent contractors to enter into written agreements upon the commencement of their relationships with us, which assign to us all intellectual property and work product made, developed or conceived by them in connection with their employment with us. These agreements also provide that any confidential or proprietary information disclosed or otherwise made available by us be keptremains confidential.
We also enter into confidentiality and non-disclosure agreements with our clients and vendors.
We customarily enter into non-disclosureclients. These customary agreements withcover our clients with respect to the use of theirthe clients’ software systems and platforms. Ourplatforms as our clients usually own the intellectual property in the software or systemsproducts we develop for them. Furthermore, we usually grant a perpetual, worldwide, royalty-free, nonexclusive, transferable and non-revocable license to our clients to use our preexisting intellectual property, but only to the extent necessary in order to use the software or systems we developed for them.
Protecting our intellectual property rights is critical to our business. We have invested, and will continue to invest, in research and development to enhance our domain knowledge and create complex, specialized solutions for our clients.
Long-lived Assets
Our long lived-assets disclosed in the table below consist of property and equipment. The table below sets forthpresents the locations of our long-lived assets:
Year Ended December 31,
December 31,
2014
 December 31,
2013
 December 31, 20122015 2014 2013
Belarus$41,652
 $38,697
 $40,095
$44,879
 $41,652
 $38,697
Ukraine4,392
 5,525
 5,357
4,487
 4,392
 5,525
Hungary2,773
 2,644
 3,234
2,485
 2,773
 2,644
Russia2,196
 3,414
 2,048
2,084
 2,196
 3,414
United States2,001
 2,217
 1,744
1,969
 2,001
 2,217
India1,099
 
 
Poland1,088
 747
 4
Other2,120
 818
 657
2,408
 1,373
 814
Total$55,134
 $53,315
 $53,135
$60,499
 $55,134
 $53,315
Acquisitions
We have acquired a number of companies in order to expand our vertical-specific domain expertise, geographic footprint, service portfolio, client base and management proficiency.
On October 31, 2014, we acquired Great Fridays Limited and its subsidiaries to expand our product and design service portfolio. Great Fridays Limited, headquartered in Manchester, UK, with offices in London, San Francisco and New York, focuses on bridging the gap between business and design. The acquisition of Great Fridays added approximately 50 creative design professionals to our headcount. We expect this acquisition to further expand our product and design services capabilities.
On June 6, 2014, we acquired substantially all of the assets and assumed certain specified liabilities of each of GGA Software Services, LLC, Institute of Theoretical Chemistry, Inc., and GGA’s Russian affiliate (collectively, “GGA”). Established in 1994, GGA develops scientific informatics applications, content databases, algorithms and models, and delivers IT support, maintenance, and quality assurance services to leading healthcare and life sciences companies. The acquisition added over 300 IT professionals and over 120 scientists to our highly-experienced employee base and created a significant growth opportunity in the life sciences and healthcare industries. We also see tremendous potential in combining our traditionally recognized strengths with GGA’s algorithm development, mathematical modeling, and sophisticated content

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database development capabilities. The capability to develop and operationalize platforms, combining tools, models and data, has broad applications across other strategic industries on which EPAM focuses, including the Banking and Financial Services, Business Information and Media, and Retail and Consumer verticals.
On April 30, 2014, 2015, we acquired all of the outstanding equity of Joint Technology Development Limited,NavigationArts, Inc. and its subsidiary, NavigationArts, LLC (collectively “NavigationArts”). The U.S.-based NavigationArts provides digital consulting, architecture and content solutions and is regarded as a leading user-experience agency. The acquisition of NavigationArts added approximately 90 design consultants to our headcount.
On November 16, 2015, we acquired all of the outstanding equity of Alliance Consulting Global Holdings, Inc. including its wholly-owned direct and indirect subsidiaries Alliance Global Services, Inc., Alliance Global Services, LLC, companies organized under the laws of USA, and Alliance Global Services IT India, a company organized under the laws of Hong Kong, including its wholly-owned subsidiaries Jointech Software (Shenzhen) Co., Ltd., a company organized under the laws of China,India (collectively, “AGS”). AGS provides software product development services and Jointech Software Pte. Ltd., a company organized under the laws of Singapore (collectively, “Jointech”). Jointech provides strategic technology servicestest automation solutions and has multiple locations in the investment banking, wealthUnited States and asset management industries.India. The acquisition of JointechAGS added over 2001,151 IT professionals to our headcount and significantly extended our footprint in South-East Asia. With this acquisition, we expect to create an integrated global platform focused on serving large multinational customers within the Banking and Financial Services vertical, and extend our global value proposition in the region.United States and India.

On March 5, 2014, we completed an acquisition
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Table of substantially all of the assets and assumed certain specific liabilities of U.S.-based healthcare technology consulting firm Netsoft Holdings LLC and Armenia-based Ozsoft, LLC (collectively, “Netsoft”). Netsoft works with leading health plans in the U.S. on their medical management and claims systems, and specializes in working with leaders in pioneering fields such as accountable care organizations, tele-medicine, healthcare analytics, personalized medicine, health information exchanges, and online self-service capabilities. The Netsoft acquisition added approximately 40 IT professionals to our headcount.Contents
In December 2012, we completed the acquisition of Empathy Lab, LLC, a U.S.-based digital strategy and multi-channel experience design firm with approximately 85 IT professionals. The acquisition has enhanced our strong capabilities in global delivery of software engineering services with Empathy Lab’s proven expertise in two important growth areas - development and execution of enterprise-wide eCommerce initiatives and transformation of media consumption and distribution channels. In addition to strengthening our Travel and Consumer and Business Information and Media verticals, Empathy Lab brings significant expertise in digital marketing strategy consulting and program management.
In May 2012, we completed the acquisition of Thoughtcorp, a Canadian company with a 17-year history of successfully delivering high-value IT solutions and complex software applications to some of Canada’s most prominent companies within the telecommunications, financial and retail sectors. With the Thoughtcorp acquisition, we have strengthened our Banking and Financial Services, and Travel and Consumer verticals, and have gained significant telecommunications expertise with a highly skilled and experienced employee base of approximately 50 IT professionals. The acquisition also expands our North American geographic footprint and complements our global delivery capabilities with expertise in areas important for us, such as Agile Development, Enterprise Mobility and Business Intelligence.

Regulations
Due to the industry and geographic diversity of our operations and services, our operations are subject to a variety of rules and regulations. Several foreign and U.S. federal and state agencies regulate various aspects of our business. See “Item 1A. Risk Factors — Risks Relating to Our Business — We are subject to laws and regulations in the United States and other countries in which we operate, concerning our operations, including export restrictions, U.S. economic sanctions and the Foreign Corrupt Practices Act, or FCPA, and similar anti-corruption laws. If we are not in compliance with applicable legal requirements, we may be subject to civil or criminal penalties and other remedial measures.”
Corporate Information
EPAM Systems, Inc. was incorporated in the State of Delaware on December 18, 2002. Our predecessor entity was founded in 1993. Our principal executive offices are located at 41 University Drive, Suite 202, Newtown, Pennsylvania 18940 and our telephone number is 267-759-9000. We maintain a website at http://www.epam.com. Our website and the information accessible through our website are not incorporated into this annual report.
We make certain filings with the Securities and Exchange Commission (“SEC”), including our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and all amendments and exhibits to those reports. We make such filings available free of charge through the Investor Relations section of our website, http://investors.epam.com, as soon as reasonably practicable after they are filed with the SEC. The filings are also available through the SEC at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549 or by calling 1-800-SEC-0330. In addition, these filings are available on the internet at http://www.sec.gov. Our press releases and recent analyst presentations are also available on our website. The information on our website does not constitute a part of this annual report.


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Item 1A. Risk Factors
Risk factors, which could cause actual results to differ from our expectations and which could negatively impact our financial condition and results of operations, are discussed below and elsewhere in this annual report. The risks and uncertainties described below are not the only ones we face. If any of the risks or uncertainties described below or any additional risks and uncertainties actually occur, our business, results of operations and financial condition could be materially and adversely affected. In particular, forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified. See “Special Note Regarding Forward-Looking Statements.”Statements”.
Risks Relating to Our Business
We may be unable to effectively manage our rapid growth or achieve anticipated growth, which could place significant strain on our management personnel, systems and resources.
We have experienced rapid growth and significantly expanded our business over the past several years. Our revenues grew from $221.8 million in 2010 to $730.0 million in 2014 as a result of organic growthyears, both organically and growth through strategic acquisitions. As of December 31, 2014, we had 11,824 IT professionals, as compared to 5,344 IT professionals as of December 31, 2010. We have also grown our support function headcount, including finance, legal and other areas.
Our rapid growth has placed and will continue to place significant demands on our management and our administrative, operational and financial infrastructure. Continued expansion increases the challenges we face in:
recruiting, training and retaining sufficiently skilled IT professionals and management personnel;
adhering to and further improving our high-quality and process execution standards and maintaining high levels of client satisfaction;
managing a larger number of clients in a greater number of industries and locations;
maintaining effective oversight of personnel and delivery centers;
preserving our culture, values and entrepreneurial environment;
coordinating effectively across geographies and business units to execute our strategic plan; and
developing and improving our internal administrative infrastructure, particularly our financial, operational, communications and other internal systems.
Moreover, we intend to continue our expansion for the foreseeable future to pursue existing and potential market opportunities. As we introduce new services or enter into new markets, we may face new market, technological, operational, compliance and administrative risks and challenges, and we may not be able to mitigate these risks and challenges to successfully grow those services or markets. As a result of these problems associated with expansion, we may not be able to achieve our anticipated growth and our business, prospects, financial condition and results of operations could be materially adversely affected.

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Our failure to successfully attract, train and retain new IT professionals with the qualifications necessary to fulfill the needs of our existing and future clients or to assimilate new IT professionals successfully could materially adversely affect our ability to provide high quality services to ourthose clients.
Our success depends largely on the contributions ofThe ability to hire and retain highly-skilled information technology professionals is critical to our IT professionals.success. To maintain and renew existing engagements and obtain new business, we must attract, train and retain skilled IT professionals, including experienced management IT professionals. Competition for IT professionals can be intense in the markets in whichwhere we operate can be intense and, accordingly, we may not be able to retainhire or hireretain all of the IT professionals necessary to meet our ongoing and future business needs. If we are unable to attract and retain the highly-skilled IT professionals we need,Consequently, we may have to forgo projects fordue to lack of resources or be unableinability to staff projects optimally. The total attrition rates among our IT professionals who have worked for us for at least six months were 11.8%, 13.1% and 10.7% for 2014, 2013 and 2012, respectively. We may encounter higher attrition rates in the future. Any reductions in headcount for economic or business reasons, however temporary, could negatively affect our reputation as an employer and our ability to hire IT professionals to meet our business requirements.
A significant increase in the attrition rate among IT professionals with specialized skills could decrease our operating efficiency and productivity and could lead to a decline in demand for our services. In addition, any reductions in headcount for economic or business reasons, however temporary, could negatively affect our reputation as an employer and our ability to hire IT professionals to meet our business requirements.
Increases in wages for our IT professionals and other compensation expense could prevent us from sustaining our competitive advantage and result in dilution to our stockholders.
Wage costs for IT professionals in CIS, CEE and APAC, and certain other geographies in which we operate are lower than comparable wage costs in more developed countries. However, wage costs in the service industry in these countries may

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increase at a faster rate than in the past, which ultimately may make us less competitive unless we are able to increase the efficiency and productivity of our IT professionals as well as the prices we can charge for our services. Increases in wage costs may reduce our profitability.
Additionally, we have granted certain equity-based awards under our stock incentive plans and entered into certain other stock-based compensation arrangements in the past, as a result of which we have recorded $24.6 million, $13.2 million and $6.8 million as stock-based compensation expenses for the years ended December 31, 2014, 2013 and 2012, respectively.
Generally Accepted Accounting Principles in the United States (“GAAP”) prescribe how we account for stock-based compensation, which could adversely or negatively impact our results of operations or the price of our common stock. GAAP requires usexpect to recognize stock-based compensation as compensation expense in the statement of operations generally based on the fair value of equity awards on the date of the grant, with compensation expense recognized over the period in which the recipient is required to provide service in exchange for the equity award.continue this practice. The expenses associated with stock-based compensation may reduce the attractiveness to us of issuing equity awards under our equity incentive plan. However, if we do not grant equity awards, or if we reduce the numbervalue of equity awards we grant, we may not be able to attract and retain key personnel. If we grant more equity awards to attract and retain key personnel, the expenses associated with such additional equity awards could materially adversely affect our results of operations. The issuance of equity-based compensation would also result in additional dilution to our stockholders.
Our success depends substantially on the continuing efforts of our senior executives and other key personnel, and our business may be severely disrupted if we lose their services.
Our future success heavily depends upon the continued services of our senior executives and other key employees. If one or more of our senior executives or key employees are unable or unwilling to continue in their present positions, it could disrupt our business operations, and we may not be able to replace them easily or at all. In addition, competition for senior executives and key personnel in our industry is intense, and we may be unable to retain our senior executives and key personnel or attract and retain new senior executives and key personnel in the future, in which case our business may be severely disrupted.
If any of our senior executives or key personnel, such as business development managers, joins a competitor or forms a competing company, we may lose clients, suppliers, know-how and key IT professionals and staff members to them. Additionally, there could be unauthorized disclosure or use of our technical knowledge, practices or procedures by such personnel. If any dispute arises between our senior executives or key personnel and us, any non-competition, non-solicitation and non-disclosure agreements we have with our senior executives or key personnel might not provide effective protection to us, especially in CIS and CEE countries where some of our senior executives and key employees reside, in light of uncertainties with legal systems in CIS and CEE countries.
Our subcontracting practices may exposeglobal business exposes us to technical uncertainties, potential liabilitiesoperational and reputational harm.
In order to meet our personnel needs, increase workforce flexibility, and improve pricing competitiveness, we use subcontractors and freelancers primarily to perform short-term assignments in certain specialty areas or on other projects where it is impractical to use our employees, where we need to supplement our resources, or for other purposes as needed. Although we try to source competent and credible third parties as our subcontractors, they may not be able to deliver the level of service that our clients expect us to deliver. Furthermore, we enter into confidentiality agreements with our subcontractors, but we cannot guarantee that they will not breach the confidentiality of our clients or us and misappropriate our or our clients’ proprietary information and technology in the course of providing service. We, as the party to the contract with the client, are directly responsible for the losses our subcontractors cause our clients. Under the subcontracting agreements we enter into, our subcontractors generally promise to indemnify us for damages caused by their breach, but we may be unable to collect under these agreements. Moreover, their breaches may damage our reputation, cause us to lose existing business and adversely affect our ability to acquire new business in the future.
Adverse or uncertain economic political and social conditions may significantly and adversely affect our business, prospects, results of operations and financial condition.risks.
We are a global company with substantial international operations. Our revenues from clients outside North America represented 48.5%45.9%, 47.8%48.5% and 50.8%47.8% of our revenues excluding reimbursable expenses for 2015, 2014 2013 and 2012. Deterioration of social, political, labor or economic conditions in a specific country or region, and our failure to successfully anticipate changing conditions in these markets, could challenge our ability to conduct operations in those countries or regions or increase our operating costs. In addition, the2013. The majority of our employees, along with our development and delivery centers, are located in the CIS and CEE.

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Table The global nature of Contentsour business creates operational and economic risks.

Risks inherent in conducting international operations include:
foreign exchange fluctuations;
application and imposition of protective legislation and regulations relating to import or export;
difficulties in enforcing intellectual property and/or contractual rights;

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complying with a wide variety of foreign laws;
potentially adverse tax consequences;
tariffs, quotas and other trade protection measures;
competition from companies with more experience in a particular country or with international operations;
potential difficulties integrating new facilities and new employees into our operations and culture;
potential difficulties in collecting accounts receivable;
overall foreign policy and variability of foreign economic conditions.
We earn our revenues and incur our expenses in multiple currencies, which exposes us to foreign exchange risks relating to revenues, receivables, compensation, purchases and capital expenditures. Currency exchange volatility caused by political or economic instability or other factors, could materially impact our results. See “Item 7A. Quantitative and Qualitative Disclosures about Market Risk.” The IT services industry is particularly sensitive to the economic environment and the industry tends to decline during general economic downturns. Given our significant revenues from North America and Europe, if those economies further weaken or slow, pricing for our services may be depressed and our clients may reduce or postpone their technology spending significantly, which may in turn lower the demand for our services and negatively affect our revenues and profitability.
War, terrorism, other acts of violence or natural or manmade disasters may affect the markets in which we operate, our clients, and our service delivery.
Our business may be negatively affected by instability, disruption or destruction in a geographic region in which we operate, regardless of cause, including war, terrorism, riot, civil insurrection or social unrest; and natural or manmade disasters, including famine, flood, fire, earthquake, storm or disease. Such events may cause clients to delay their decisions on spending for IT services and give rise to sudden significant changes in regional and global economic conditions and cycles. These events also pose significant risks to our people and to physical facilities and operations around the world, whether the facilities are ours or those of our clients, which could materially adversely affect our financial results. By disrupting communications and travel, giving rise to travel restrictions, and increasing the difficulty of obtaining and retaining highly-skilled and qualified IT professionals, these events could make it difficult or impossible for us to deliver services to some or all of our clients. Travel restrictions could cause us to incur additional unexpected labor costs and expenses or could restrain our ability to retain the skilled IT professionals we need for our operations. In addition, any extended disruptions of electricity, other public utilities or network services at our facilities, as well as system failures at, or security breaches in, our facilities or systems, could also adversely affect our ability to serve our clients.
Emerging markets are subject to greater risks than more developed markets, including significant legal, economic, tax and political risks.
We have significant operations in CIS and CEE countries, India and beginning in 2014 in Asia,other Asian countries, which are generally considered to be emerging markets. Investors in emerging markets should be aware that these markets are vulnerable to market downturns and economic slowdowns elsewhere in the world and are subject to greater risks than more developed markets, including complying with foreign laws and regulations and the potential imposition of trade or foreign exchange restrictions or sanctions, tax increases, fluctuations in exchange rates, inflation and unstable political and military situations, and labor issues. For example, theThe economies of Belarus, Russia, Ukraine, Hungary and other CIS and CEEcertain countries where we operate have experienced periods of considerable instability and have been subject to abrupt downturns. Moreover, theseemerging markets have less established legal systems, which can be characterized by gaps in regulatory structures, selective enforcement of laws, and limited judicial and administrative guidance on legislation, among other limitations. As has happened in the past, financialFinancial problems or an increase in the perceived risks associated with investing in emerging economies could dampen foreign investment in these markets and materially adversely affect their economies. Such economic instability and any future deterioration in the international economic situation could materially adversely affect our business, financial condition and results of operations.

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Our operations may be adversely affected by ongoing developmentsconflict in the Ukraine.
EscalatingContinuing military activities in Ukraine and on its eastern border have combined with Ukraine’s weak economic conditions to createfuel ongoing uncertainty in Ukraine, Russia and other markets. TheIn response to the actions in Ukraine, have prompted condemnation from the international community and combined with the continuing political and economic uncertainties in Ukraine have had an adverse effect on the Ukrainian and Russian economies. In April 2014, theEU, United States, Office of Foreign Assets Control (“OFAC”) added certain individualsCanada, Japan, Switzerland and entities to its list of Specially Designated Nationals. In Julyother nations have imposed, and September 2014, OFAC imposed limited,may continue imposing further, economic sanctions, including specific sanctions on certain Russian entities by listing them on the Sectoral Sanctions Identification

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List (“SSI List”); the SSI List includes entities(specifically in the energy, defense and financial sectors. The EU imposed similar sanctions in July 2014, and separate sanctions were imposed by countries including Canada, Japan and Switzerland. Resolutionsectors). Restored stability of Ukraine’s political and economic conditions may not occur for some time and the disputes in Ukrainethere could devolve intobe increased violence or economic distress.distress in Ukraine or other areas in the region.
We have delivery centers in the Ukraine employing approximately 2,9563,734 IT professionals, none of which are located in Crimea.the most volatile regions of Eastern Ukraine. We also have delivery centers in Russia, employing approximately 1,7142,235 IT professionals located in various cities including Moscow and St. Petersburg. To date we have not experienced any interruption in our office infrastructure, utility supply or Internet connectivity. All EPAM offices remain open and fully functional, including those we use in the Ukraine and Russiaconnectivity needed to support our clients. We continue to monitor the situation closely. Our contingency plans include relocating work or personnel to other locations and adding new locations, as appropriate. We have no way to predict the progress or outcome of the situation, as the political and civil unrest and reported military activities are fluid and beyond our control.  Prolonged unrest, military activities, or broad-basedpolitical instability in Ukraine, sanctions should they be implemented,against Russia and Russia’s potential response to such sanctions could have a material adverse effect on our operations.
We generate a significant portion ofdo not have long-term commitments from our revenues from a concentrated client base,clients, and anyour clients may terminate contracts before completion or choose not to renew contracts. A loss of business from thesesignificant clients could materially reduceaffect our revenues.results of operations.
Our ability to maintain close relationships with our major clients is essential to the growth and profitability of our business. However, the volume of work performed for any specific client is likely to vary from year to year, especially since we generally are not our clients’ exclusive IT services provider and we do not have long-term commitments from any clients to purchase our services. The IT services we provide to our clients, and the revenues and net income from those services, may decline or vary based on the type and quantity of services we provide, wage inflation and other pricing considerations. Furthermore, our reliance on any individual client for a significant portion of our revenues may give that client a certain degree of pricing leverage against us when negotiating contracts and terms of service. The loss of any of our major clients, or a significant decrease in the volume of work they outsource to us or the price at which we sell our services to them, could materially adversely affect our revenues and thus our results of operations.
We do not have long-term commitments from our clients, and our clients may terminate contracts before completion or choose not to renew contracts.
Abilityability of our clients to terminate master services agreements and work orders with or without cause makes our future revenues uncertain, as our clients are generally not obligated for any long-term commitments to us. Although a substantial majority of our revenues are generated from clients who also contributed to our revenues during the prior year, our engagements with our clients are typically for projects that are singular in nature. In addition, our clients can terminate many of our master services agreements and work orders with or without cause. Therefore, we must seek to obtain new engagements when our current engagements end. Our failure to perform or observe any contractual obligations could also result in termination or non-renewal of a contract, as could a change of control of our company.
There are a number of factors relating to our clients that are outside of our control, which might lead them to terminate a contract or project with us, including a client's:client’s:
financial difficulties;
corporate restructuring, or mergers and acquisitions activity;
change in strategic priorities, resulting in elimination of the impetus for the project or a reduced level of technology spending;
change in outsourcing strategy resulting in moving more work to the client’s in-house technology departments or to our competitors; and
replacement of existing software with packaged software supported by licensors.
Termination or non-renewal of a customer contract could cause us to experience a higher than expected number of unassigned employees and an increase in our cost of revenues as a percentage of revenues, until we are able to reduce or reallocate our headcount. We mayThe loss of any of our major clients, or a significant decrease in the volume of work they outsource to us or the price at which we sell our services to them, if not be able to replace anyreplaced by new client that elects to terminate or not renew its contract with us, whichengagements, could materially adversely affect our revenues and thus our results of operations.

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Our revenues are highly dependent on a limited number of industries, and any decrease in demand for outsourced services in these industries could reduce our revenues and adversely affect our results of operations.
A substantial portion of our clients is concentrated in fourfive specific industry verticals: Banking and Financial Services; ISVsSoftware and Technology; Business InformationHi-Tech; Media and Media; andEntertainment; Travel and Consumer.Consumer; and Life Sciences and Healthcare. Our business growth largely depends on

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continued demand for our services from clients in these fourfive industry verticals and other industries that we may target in the future, as well as on trends in these industries to outsource IT services.
A downturn in any of our targeted industries, a slowdown or reversal of the trend to outsource IT services in any of these industries or the introduction of regulations that restrict or discourage companies from outsourcing could result in a decrease in the demand for our services and materially adversely affect our business, financial condition and results of operations. For example, a worsening of economic conditions in the financial services industry, or significant consolidation in any of these industries may reduce the demand for our services and negatively affect our revenues and profitability. Other developments in the industries in which we operate may also lead to a decline in the demand for our services, and we may not be able to successfully anticipate and prepare for any such changes. Decreased demand for our services, or increased pricing pressure on us from our clients in these key industries could adversely affect our results of operations.

If our pricing structures are based on inaccurate expectations and assumptions regarding the cost and complexity of performing our work, or if we are not able to maintain favorable pricing for our services, then our contracts could be unprofitable.
We negotiate pricing terms with our clients utilizing a range of pricing structures and conditions. We face a number of risks when pricing our contracts. Our pricing is highly dependent on our internal forecasts, assumptions and predictions about our projects, the marketplace and global economic conditions (including foreign exchange volatility), which may be based on limited data and could be inaccurate.. Many of our projects entail the coordination of operations and personnel in multiple locations with different skill sets and competencies. Our pricing and cost estimates for the work that we perform sometimesmay include anticipated long-term cost savings from transformational and other initiatives that we expect to achieve and sustain over the life of the contract. There is a risk thatBecause of these inherent uncertainties, we willmay underprice our projects particularly(particularly with fixed-price contracts,contracts), fail to accurately estimate the costs of performing the work or fail to accurately assess the risks associated with potential contracts. In particular, anyAny increased or unexpected costs, delays or failures to achieve anticipated cost savings, or unexpected risks we encounter in connection with the performance of this work, including those caused by factors outside our control, could make these contracts less profitable or unprofitable. Moreover, if we are not able to pass on to our clients increases in compensation cost (whether driven by competition for talent or ordinary-course pay increases) or charge premium prices when justified by market demand or the type of service, our profitability may suffer.
In addition, a number of our contracts contain pricing terms that condition a portion of the payment of fees by the client on our ability to meet defined performance goals, service levels and completion schedules set forth in the contracts. Our failure to meet such performance goals, service levels or completion schedules or our failure to meet client expectations in such contracts may result in less profitable or unprofitable engagements.
Our profitability will suffer if we are not able to maintain our resource utilization levels and productivity levels.
Our profitability is significantly impacted by our utilization levels of fixed-cost resources, including human resources as well as other resources such as computers and office space, and our ability to increase our productivity levels. We have expanded our operations significantly in recent years, which has resulted in a significant increase inmaterially increased both our headcount and fixed overhead costs. Some of our IT professionals are specially trained to work for specific clients or on specific projects and some of our offshore development centers are dedicated to specific clients or specific projects. Our ability to manage our utilization levels depends significantly on our ability to hire and train high-performing IT professionals and to staff projects appropriately, and on the general economy and its effect on our clients and their business decisions regarding the use of our services. If we experience a slowdown or stoppage of work for any client or on any project for which we have dedicated IT professionals or facilities, we may not be able to efficiently reallocate these IT professionals and facilities to other clients and projects to keep their utilization and productivity levels high. If we are not able to maintain optimal resource utilization levels without corresponding cost reductions or price increases, our profitability will suffer.
If we are not successful in managing increasingly large and complex projects, we may not achieve our financial goals and our results of operations could be adversely affected.
To successfully perform larger and more complex projects, we need to establish and maintain effective, close relationships with our clients, continue high levels of client satisfaction and develop a thorough understanding of our clients’ operations. In addition, we may face a number of challenges managing larger and more complex projects, including:
maintaining high-quality control and process execution standards;

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maintaining planned resource utilization rates on a consistent basis and using an efficient mix of onsite and offshore staffing;

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maintaining productivity levels and implementing necessary process improvements; and
controlling costs.
Our ability to successfully manage large and complex projects depends significantly on the skills of our management personnel and IT professionals, some of whom do not have experience managing large-scale or complex projects. In addition, large and complex projects may involve multiple engagements or stages, and there is a risk that a client may choose not to retain us for additional stages or may cancel or delay additional planned engagements. Such cancellations or delays may make it difficult to plan our project resource requirements. If we fail to successfully obtain engagements for large and complex projects, we may not achieve our revenue growth and other financial goals. Even if we are successful in obtaining such engagements, a failure by us to effectively manage these large and complex projects could damage our reputation, cause us to lose business, impactcompress our margins and adversely affect our business and results of operations.
We face risks associated with having a long selling and implementation cycle for our services that require us to make significant resource commitments prior to realizing revenues for those services.
We have a long selling cycle for our IT services, which requires significant investment of human resources and time by both our clients and us. Before committing to use our services, potential clients require us to expend substantial time and resources educating them on the value of our services and our ability to meet their requirements. Therefore, our selling cycle is subject to many risks and delays over which we have little or no control, including our clients’ decision to choose alternatives to our services (such as other IT services providers or in-house resources) and the timing of our clients’ budget cycles and approval processes. If our sales cycle unexpectedly lengthens for one or more large projects, it would negatively affect the timing of our revenues and hinder our revenue growth. For certain clients, we may begin work and incur costs prior to executing a contract. A delay in our ability to obtain a signed agreement or other persuasive evidence of an arrangement, or to complete certain contract requirements in a particular quarter, could reduce our revenues in that quarter.
Implementing our services also involves a significant commitment of resources over an extended period of time from both our clients and us. Our clients may experience delays in obtaining internal approvals or delays associated with technology, thereby further delaying the implementation process. Our current and future clients may not be willing or able to invest the time and resources necessary to implement our services, and we may fail to close sales with potential clients to whom we have devoted significant time and resources. Any significant failure to generate revenues or delays in recognizing revenues after incurring costs related to our sales or services process could materially adversely affect our business.
If we are unable to collect our receivables from, or bill our unbilled services to, our clients, our results of operations and cash flows could be materially adversely affected.
Our business depends on our ability to successfully obtain payment from our clients of the amounts they owe us for work performed. We usually bill and collect on relatively short cycles. We maintain allowances against receivables. Actual losses on client balances could differ from those that we currently anticipate and, as a result, we might need to adjust our allowances. There is no guarantee that we will accurately assess the creditworthiness of our clients. Weak or volatile macroeconomic conditions and related turmoil in the global financial system conditions could also result in financial difficulties including limited access to the credit markets, insolvency, or bankruptcy for our clients, and, as a result, could cause clients to delay payments to us, request modifications to their payment arrangements that could increase our receivables balance, or default on their payment obligations to us. Timely collection of client balances also depends on our ability to complete our contractual commitments and bill and collect our contracted revenues. If we are unable to meet our contractual requirements, we might experience delays in collection of and/or be unable to collect our client balances, and if this occurs, our results of operations and cash flows could be materially adversely affected. Moreover, in the event of delays in payment from our governmental and quasi-governmental clients, we may have difficulty collecting on receivables owed. In addition, if we experience an increase in the time to bill and collect for our services, our cash flows could be materially adversely affected.
We face intense competition for clients and opportunities from onshore and offshore IT services companies, and increased competition, our inability to compete successfully against competitors, pricing pressures or loss of market share could materially adversely affect our business.
The market for IT services is highly competitive, and we expect competition to persist and intensify. We believe that the principal competitive factors in our markets are reputation and track record, industry expertise, breadth and depth of service offerings, quality of the services offered, language, marketing and selling skills, scalability of infrastructure, ability to address clients’ timing requirements and price.
We face competition from offshore IT services providers in other outsourcing destinations with low wage costs such as India and China, as well as competition from large, global consulting and outsourcing firms and in-house IT departments of large corporations. Clients tend to engage multiple IT services providers instead of using an exclusive IT services provider,

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which could reduce our revenues to the extent that clients obtain services from other competing IT services providers. Clients may prefer IT services providers that have more locations or that are based in countries more cost-competitive or more stable than some CIS and CEE countries.of the emerging markets in which we operate.

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Current or prospective clients may elect to perform certain services themselves or may be discouraged from transferring services from onshore to offshore IT services providers to avoid negative perceptions that may be associated with using an offshore IT services provider. This shift away from offshore outsourcing would seriously harm our ability to compete effectively with competitors that provide services from within the countries in which our clients operate.
Some of our present and potential competitors may have substantially greater financial, marketing or technical resources than EPAM. Client buying patterns can change if clients become more price sensitive and accepting of low-cost suppliers with less emphasis on quality. Therefore, we cannot assure you that we will be able to retain our clients while competing against such competitors. Increased competition, our inability to compete successfully, pricing pressures or loss of market share could materially adversely affect our business.
Our ability to generate and retain business depends on our reputation in the marketplace.
Our services are marketed to clients and prospective clients based on a number of factors. Since many of our specific client engagements involve unique services and solutions, our corporate reputation is a significant factor in our clients’ evaluation of whether to engage our service, and our clients’ perception of our ability to add value through our services is critical to the profitability of our engagements. We believe the EPAM brand name and our reputation are important corporate assets that help distinguish our services from those of our competitors and also contribute to our efforts to recruit and retain talented employees.
However, our corporate reputation is potentially susceptible to damage by actions or statements made by current or former clients, competitors, vendors, adversaries in legal proceedings, government regulators, as well as members of the investment community and the media. There is a risk that negative information about our company, even if based on false rumor or misunderstanding, could adversely affect our business. In particular, damage to our reputation could be difficult and time-consuming to repair, could make potential or existing clients reluctant to select us for new engagements, resulting in a loss of business, and could adversely affect our recruitment and retention efforts. Damage to our reputation could also reduce the value and effectiveness of the EPAM brand name and could reduce investor confidence in us.
If we are unable to adapt to rapidly changing technologies, methodologies and evolving industry standards we may lose clients and our business could be materially adversely affected.
Rapidly changing technologies, methodologies and evolving industry standards are inherent in the market for our services. Our future success will depend in part upon our ability to anticipate developments in IT services, enhance our existing services and to develop and introduce new services to keep pace with such changes and developments and to meet changing client needs. The process of developing our client solutions is extremely complex and is expected to become increasingly complex and expensive in the future due to the introduction of new platforms, operating systems, technologies and methodologies. Our ability to keep pace with, anticipate or respond to changes in technology, methodology and business is subject to a number of risks, including that:
we may find it difficult or costly to update our services, applications, tools and software and to develop new services quickly enough to meet our clients’ needs;
we may find it difficult or costly to make some features of our software work effectively and securely over the Internet or with new or changed operating systems;
we may find it difficult or costly to update our software and services to keep pace with business, evolving industry standards, methodologies, regulatory and other developments in the industries where our clients operate; and
we may find it difficult to maintain a high level of quality in implementing new technologies and methodologies.
We may not be successful in anticipating or responding to these developments in a timely manner, or if we do respond, the services, technologies or methodologies we develop or implement may not be successful in the marketplace. Further, services, technologies or methodologies that are developed by our competitors may render our services non-competitive or obsolete. Our failure to enhance our existing services and to develop and introduce new services to promptly address the needs of our clients could cause us to lose clients and materially adversely affect our business.

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Undetected software design defects, errors or failures may result in loss of or delay in market acceptance of our services or in liabilities that could materially adversely affect our business.

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Our software development solutions involve a high degree of technological complexity, have unique specifications and could contain design defects or software errors that are difficult to detect and correct. Errors or defects may result in the loss of current clients and loss of, or delay in, revenues, loss of market share, loss of client data, a failure to attract new clients or achieve market acceptance, diversion of development resources and increased support or service costs. We cannot provide assurance that, despite testing by our clients and us, errors will not be found in new software product development solutions, which could result in litigation, other claims for damages against us, as well as reputational harm and thus could materially adversely affect our business.
Security breaches and other disruptions to network security could compromise our information and expose us to liability, which would cause our business and reputation to suffer.
In the ordinary course of business, we have access to, collect, store, process and transmit sensitive or confidential data, including intellectual property, our proprietary business information and that of our clients, and personally identifiable information of our clients and employees, in our data centers and on our networks. The secure processing, maintenance and transmission of this information is critical to our operations and business strategy. Despite our security measures, our information technology and infrastructure may be vulnerable to attacks by hackers or breached due to human error, malfeasance or other disruptions. Any such breach could compromise our networks and the information stored there could be accessed, publicly disclosed, misappropriated, lost or stolen. Any such access, disclosure or other loss of information could result in legal claims or proceedings, liability under applicable laws that protect the privacy of personal information and regulatory penalties. Such a breach or disruption could also disrupt our operations and the services we provide to customers, damage our reputation, and cause a loss of confidence in our products and services, as well as require us to expend significant resources to protect against further breaches and to rectify problems caused by such a breach or disruption. Any of these results could adversely affect our business, revenues and competitive position.
A significant failure in our telecommunications or IT infrastructure or systems could harm our service model, which could result in a reduction of our revenue and otherwise disrupt our business.
Part of our service model is to maintain active voice and data communications, financial control, accounting, customer service and other data processing systems between our clients’ offices, our delivery centers and our client management locations (including our headquarters in Newtown, PA).locations. Moreover, many of our key systems for corporate operations are internally-developed applications. Our business activities may be materially disrupted in the event of a partial or complete failure of any of these internet, IT or communication systems, which could be caused by, among other things, software malfunction, computer virus attacks, conversion errors due to system upgrading, damage from fire, earthquake, power loss, telecommunications failure, unauthorized entry, demands placed on internet infrastructure by growing numbers of users and time spent online or increased bandwidth requirements or other events beyond our control. Internally-developed systems may not possess the same level of control, security or support that traditional third-party systems and applications do. Loss of all or part of the infrastructure or systems for a period of time could hinder our performance or our ability to complete client projects on time which, in turn, could lead to a reduction of our revenue or otherwise materially adversely affect our business and business reputation.
We may be liable to our clients for damages caused by the disclosure of confidential information, system failures or errors.
If any person, including any of our employees,personnel, misappropriates sensitive or confidential client information, including personally identifiable information, we could be subject to significant liability from our clients or from our clients’ customers for breaching contractual confidentiality provisions or privacy laws. Some of our client agreements do not limit our potential liability for certain occurrences, including breaches of confidentiality and infringement indemnity. Furthermore, breaches of confidentiality may entitle the aggrieved party to equitable remedies, including injunctive relief. Any such breach or misappropriation resulting in unauthorized disclosure of sensitive or confidential client information, or a violation of intellectual property rights, whether through employee misconduct, breach of our computer systems, systems failure or otherwise, may subject us to liabilities, damage our reputation and cause us to lose clients.

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If we cause disruptions to our clients’ businesses or provide inadequate service, our clients may have claims for substantial damages against us, which could cause us to lose clients, have a negative effect on our reputation and adversely affect our results of operations.
If our IT professionals make errors in the course of delivering services to our clients or fail to consistently meet service requirements of a client, these errors or failures could disrupt the client’s business, which could result in a reduction in our revenues or a claim for substantial damages against us. Furthermore, any errors by our employees in the performance of services for a client, or poor execution of such services, could result in a client terminating our engagement and seeking damages from us. In addition, a failure or inability to meet a contractual requirement could seriously damage our reputation and affect our ability to attract new business. Any failure in a client’s system or breach of security relating to the services we provide to the client could damage our reputation or result in a claim for substantial

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damages against us, regardless of our responsibility for such failure. Furthermore, any errors by our employees in the performance of services for a client, or poor execution of such services, could result in a client terminating our engagement and seeking damages from us. The successful assertion of one or more large claims against us, whether or not successful could materially adversely affect our reputation, business, financial condition and results of operations. Even if such assertions against us are unsuccessful,
From time to time we may incur reputational harm and substantial legal fees.
We are investinginvest substantial cash in new facilities and physical infrastructure, and our profitability could be reduced if our business does not grow proportionately.
We have madeAs our business grows, we may invest in new facilities and continue to make significant contractual commitments related to capital expenditures on construction or expansion of our delivery centers, such as in Minsk, Belarus.physical infrastructure. We may encounter cost overruns or project delays in connection with new facilities. These expansions will likely increase our fixed costs and if we are unable to grow our business and revenues proportionately, our profitability may be reduced.
If we fail to integrate or manage acquired companies efficiently, or if the acquired companies are difficult to integrate, divert management resources or do not perform to our expectations, we may not be able to realize the benefits envisioned for such acquisitions, and our overall profitability and growth plans could be materially adversely affected.
We have from time to time expandedPart of our service capabilities and gained new clients throughexpansion strategy includes strategic acquisitions. Our abilityThese transactions involve significant challenges, including that the risk that an acquisition does not advance our business strategy, that we do not achieve a satisfactory return on our investment, that we are unable to successfully integrate acquired assets or an acquired entitycompany’s employees, client relationships and realize the benefits of an acquisition requires, among other things, successful integration of technologies, operations, and personnel in a timely and efficient manner. Challenges we face inthat the acquisition and integration process include:
divertingtransactions divert significant management attention and financial resources from our other operations and disrupting our ongoing business;
unforeseen or undisclosed liabilities and integration costs;
incurring liabilities from the acquired businesses for infringement of third-party intellectual property rights or other claims for which we may not be successful in seeking indemnification;
incurring debt, amortization expenses related to intangible assets, large and immediate write-offs, assuming unforeseen or undisclosed liabilities, or issuing common stock that would dilute our existing stockholders’ ownership;
generating sufficient revenues and net income to offset acquisition costs;
potential loss of, or harm to, employee or client relationships;
properly structuring our acquisition consideration and any related post-acquisition earn-outs and successfully monitoring any earn-out calculations and payments;
failing to realize the potential cost savings or other financial benefits and/or the strategic benefits of the acquisition;
retaining key senior management and other personnel of the acquired operations;
potential incompatibility of solutions, services and technology or corporate cultures;
consolidating and rationalizing corporate, information technology and administrative infrastructures;
integrating and documenting processes and controls;
entry into unfamiliar markets; and
increased complexity from potentially operating additional geographically dispersed sites, particularly if we acquire a company or business with facilities or operations outside of the countries in which we currently have operations.business.
The primary value of many potential acquisition targets in the IT services industry lies in their skilled IT professionals and established client relationships. Transitioning these types of assets to our business can be particularly difficult due to different corporate cultures and values, geographic distance and other intangible factors. For example, some newly acquired employees may decide not to work with us or to leave shortly after their move to our company and some acquired clients may decide to discontinue their commercial relationships with us. These challenges could disrupt our ongoing business, distract our management and employees and increase our expenses, including causing us to incur significant one-time expenses and write-offs, and make it more difficult and complex for our management to effectively manage our operations. If we are not able to successfully integrate an acquired entity and its operations and to realize the benefits envisioned for such acquisition, our overall growth and profitability plans may be adversely affected.
Our effective tax rate could be materially adversely affected by several factors.
We conduct business globally and file income tax returns in multiple jurisdictions. Our effective tax rate could be materially adversely affected by several factors, including changes in the amount of income taxed by or allocated to the various jurisdictions in which we operate that have differing statutory tax rates; changing tax laws, regulations and interpretations of

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such tax laws in multiple jurisdictions; and the resolution of issues arising from tax audits or examinations and any related interest or penalties.
We report our results of operations based on our determination of the amount of taxes owed in the various jurisdictions in which we operate. We have transfer pricing arrangements among our subsidiaries in relation to various aspects of our business, including operations, marketing, sales and delivery functions. U.S. transfer pricing regulations, as well as regulations applicable in other countries in which we operate, require that any international transaction involving associated enterprises be on arm’s-length terms. We consider the transactions among our subsidiaries to be on arm’s-length terms. The determination of our provision for income taxes and other tax liabilities requires estimation, judgment and calculations where the ultimate tax determination may not be certain. Our determination of tax liability is always subject to review or examination by authorities in various jurisdictions.
If a tax authority in any jurisdiction reviews any of our tax returns and proposes an adjustment, including as a result of a determination that the transfer prices and terms we have applied are not appropriate, such an adjustment could have a negative impact on our business.

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Our earnings could be adversely affected if we change our intent not to repatriate earnings in the CIS and CEE or such earnings become subject to U.S. tax on a current basis.
We do not accrue incremental U.S. taxes on all CIS and CEE earnings as these earnings (as well as other foreign earnings for all periods) are considered to be indefinitely reinvested outside of the United States. While we have no plans to do so, events may occur in the future that could effectively force us to change our intent not to repatriate our foreign earnings. If we change our intent and repatriate such earnings, we will have to accrue the applicable amount of taxes associated with such earnings and pay taxes at a substantially higher rate than our effective income tax rate in 2014.2015. These increased taxes could materially adversely affect our financial condition and results of operations.
Our operating results may be negatively impacted by the loss of certain tax benefits provided by the governments of Belarus Hungary and Russiaother countries to companies in our industry.
Our subsidiary in Belarus is a member of the Belarus Hi-Tech Park, in which member technology companies are 100% exempt from Belarusian income tax (which as of the date of this annual report was 18%) and from the value added tax for a period of 15 consecutive years effective July 1, 2006 and levied at a reduced rate on a variety of taxes. In addition, our subsidiary in Hungary benefited from a tax credit of 10% of qualified salaries, taken over a four-year period, for up to 70% of the total tax due for that period. We have been able to take the full 70% credit for 2007 to 2012. The Hungarian tax authorities repealed the tax credit beginning with 2012. Credits earned in years prior to 2012, however, will be allowed through 2014. We have fully utilized the 70% limit in 2014. Our subsidiary in Russia benefits from a substantially reduced rate on social contributions and an exemption on value added tax in certain circumstances, which is a benefit to qualified IT companies in Russia. If thethese tax holiday relating to our Belarusian subsidiary, the tax incentives relating to our Hungarian subsidiary or the lower tax rates and social contributions relating to our Russian subsidiarybenefits are changed, terminated, not extended or comparable new tax incentives are not introduced, we expect that our effective income tax rate and/or our operating expenses would increase significantly, which could materially adversely affect our financial condition and results of operations. See “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations -Provision— Provision for Income Taxes.”
Changes in, or interpretations of, accounting principles could have a significant impact on our financial position and results of operations
U.S. GAAP, under which we prepare our consolidated financial statements, is subject to interpretation by the Securities and Exchange Commission (“SEC”) and various bodies formed to interpret and create appropriate accounting principles. A change in these principles can have a significant effect on our reported results and may even retroactively affect previously reported transactions.
For example, the U.S.-based Financial Accounting Standards Board (“FASB”) is currently working together with the International Accounting Standards Board (“IASB”) on several projects to further align accounting principles and facilitate more comparable financial reporting between companies who are required to follow GAAP under SEC regulations and those who are required to follow International Financial Reporting Standards outside of the U.S. These efforts by the FASB and IASB may result in different accounting principles under GAAP that may result in materially different financial results for us in areas including, but not limited to, principles for recognizing revenue and lease accounting.
There may be adverse tax and employment law consequences if the independent contractor status of our IT professionals or the exempt status of our employees is successfully challenged.

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Some of our IT professionals are retained as independent contractors. Although we believe that we have properly classified these individuals as independent contractors, there is nevertheless a risk that the IRS or another federal, state, provincial or foreign authority will take a different view. Furthermore, the tests governing the determination of whether an individual is considered to be an independent contractor or an employee are typically fact sensitive and vary from jurisdiction to jurisdiction. Laws and regulations that governjurisdiction, as can the status and misclassificationinterpretation of independent contractors are subject to change or interpretation by various authorities.the applicable laws. If a federal, state, provincial or foreigngovernment authority or court enacts legislation or adopts regulations that change the manner in which employees and independent contractors are classifiedthese classification tests or makes any adverse determination with respect to some or all of our independent contractors, we could incur significant costs, under such laws and regulations, including for prior periods, in respect of tax withholding, social security taxes or payments, workers’ compensation and unemployment contributions, and recordkeeping, or we may be required to modify our business model, any of which could materially adversely affect our business, financial condition and results of operations. There is also a risk that we may be subject to significant monetary liabilities arising from fines or judgments as a result of any such actual or alleged non-compliance with federal, state, provincial or foreign tax laws.applicable laws in this area. Further, if it were determined that any of our independent contractors should be treated as employees, we could possibly incur additional liabilities under our applicable employee benefit plans.
In addition, we have classified nearly all of our U.S. employees as “exempt” under the Federal Labor Standards Act, or the FLSA. If it were determined that any of our U.S. employees should be classified as “non-exempt” under the FLSA, we may incur costs and liabilities for back wages, unpaid overtime, fines or penalties and/or be subject to employee litigation.
Our insurance coverage may be inadequate to protect us against losses.
Although we maintain some insurance coverage, including professional liability insurance, property insurance coverage for certain of our facilities and equipment and business interruption insurance coverage for certain of our operations, we do not insure for all risks in our operations. If any claims for injury are brought against us, or if we experience any business disruption, litigation or natural disaster, we might incur substantial costs and diversion of resources.
Most of the agreements we have entered into with our clients require us to purchase and maintain specified insurance coverage during the terms of the agreements, including commercial general insurance or public liability insurance, umbrella insurance, product liability insurance, and workers’ compensation insurance. Some of these types of insurance are not available on reasonable terms or at all in CIS and CEE countries.some countries in which we operate. Although to date no client has brought any claims against us for such failure, our clients have the right to terminate these agreements as a result of such failure.

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The banking and financial systems in the CISless developed markets where we hold funds remain less developed than those in some more developed markets, and a banking crisis could place liquidity constraints on our business and materially adversely affect our business and financial condition.
Banking and other financial systems in the CIS are less developed and regulated than in some more developed markets, and legislation relating to banks and bank accounts is subject to varying interpretations and inconsistent application. Banks in the CIS generally do not meet the banking standards of more developed markets, and the transparency of the banking sector lags behind international standards. Furthermore, in Russia, Belarus and other CIS countries, bank deposits made by corporate entities generally are not insured. As a result, the banking sector remains subject to periodic instability. Another banking crisis, or the bankruptcy or insolvency of banks through which we receive or with which we hold funds, particularly in Belarus, may result in the loss of our deposits or adversely affect our ability to complete banking transactions in the CIS,that region, which could materially adversely affect our business and financial condition.
Fluctuations in currency exchange rates could materially adversely affect our financial condition and results of operations.
We have significant international operations, and we earn our revenues and incur our expenses in multiple currencies. Doing business in different foreign currencies exposes us to foreign currency risks, including risks related to revenues and receivables, compensation of our personnel, purchases and capital expenditures. The majority of our revenues are in U.S. dollars, British pounds, Russian rubles and euros, and the majority of our expenses, particularly salaries of IT professionals, are denominated in U.S. dollars but payable in Belarusian rubles or in other local currencies at the exchange rate in effect at the time. To the extent that we increase our business and revenues, which are denominated in Belarusian rubles, Ukrainian hryvnia, Hungarian forints or other local currencies, we will also increase our receivables denominated in those currencies and therefore increase our exposure to fluctuations in their exchange rates against the U.S. dollar, our reporting currency. Also, economic instability in Russia and other countries can affect the local currency’s exchange rates, such as the recent plunge in the value of the Russian ruble. Any capital expenditures, such as for computer equipment, which are payable in the local currency of the countries in which we operate but are imported to such countries, and any deposits we hold in local currencies, can be materially affected by depreciation of the local currency against the U.S. dollar and the effect of such depreciation on the local

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economy. Due to the increasing size of our international operations, fluctuations in foreign currency exchange rates could materially impact our results. See “Item 7A. Quantitative and Qualitative Disclosures About Market Risk.”
Our business could be negatively affected if we incur legal liability, including with respect to our indemnification obligations, in connection with providing our solutions and services.
If we fail to meet our contractual obligations or otherwise breach obligations to our clients, we could be subject to legal liability. We may enter into non-standard agreements because we perceive an important economic opportunity or because our personnel did not adequately adhere to our guidelines. In addition, the contracting practices of our competitors may cause contract terms and conditions that are unfavorable to us to become standard in the marketplace. If we cannot or do not perform our obligations, we could face legal liability and our contracts might not always protect us adequately through limitations on the scope and/or amount of our potential liability. As a result, we might face significant legal liability and payment obligations, and our financial condition and results of operations could be materially adversely affected.
We may not be able to prevent unauthorized use of our intellectual property, and our intellectual property rights may not be adequate to protect our business and competitive position.
We rely on a combination of copyright, trademark, unfair competition and trade secret laws, as well as intellectual property assignment and confidentiality agreements and other methods to protect our intellectual property rights. Protection of intellectual property rights and confidentiality in CIS and CEE countries, and othersome countries in which we operate may not be as effective as that in the United States or other countries with more mature legal systems.
We require our employees and independent contractors to enter into written agreements with us upon the commencement of their relationship with us, which assign to EPAM all intellectual property and work product made, developed or conceived by them in connection with their employment or engagement with us. These agreements also provide that any confidential or proprietary information disclosed or otherwise made available by us be kept confidential. We also enter into confidentiality and non-disclosure agreements with our clients and vendors. These agreements may not provide meaningful protection for trade secrets, know-how or other proprietary information in the event of any unauthorized use, misappropriation or disclosure of such trade secrets, know-how or other proprietary information. The steps we have taken may be inadequate to prevent the misappropriation of our and our clients’ proprietary technology. Reverse engineering, unauthorized copying or other misappropriation of our and our clients’ proprietary technologies, tools and applications could enable third parties to benefit from our or our clients’ technologies, tools and applications without paying us for doing so, and our clients may hold us liable for that act and seek damages and compensation from us, which could harm our business and competitive position.
We rely on our trademarks, trade names, service marks and brand names to distinguish our services and solutions from the services of our competitors, and have registered or applied to register many of these trademarks. We cannot assure you that our trademark applications will be approved. Third parties may oppose our trademark applications, or otherwise challenge our use of our trademarks. In the event that our trademarks are successfully challenged, we could be forced to rebrand our services and solutions, which could result in loss of brand recognition, and could require us to devote resources to advertising and marketing new brands. Further, we cannot assure you that competitors will not infringe our trademarks, or that we will have adequate resources to enforce our trademarks.
We may need to enforce our intellectual property rights through litigation. Litigation relating to our intellectual property may not prove successful and might result in substantial costs and diversion of resources and management attention.
In addition, we rely on certain third-party software to conduct our business. If we lose the licenses which permit us to use such software, they may be difficult to replace and it may be costly to do so.

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We may face intellectual property infringement claims that could be time-consuming and costly to defend. If we fail to defend ourselves against such claims, we may lose significant intellectual property rights and may be unable to continue providing our existing services.
Our success largely depends on our ability to use and develop our technology, tools, code, methodologies and services without infringing the intellectual property rights of third parties, including patents, copyrights, trade secrets and trademarks. We may be subject to litigation involving claims of patent infringement or violation of other intellectual property rights of third parties.
We typically indemnify clients who purchase our services and solutions against potential infringement of intellectual property rights, which subjects us to the risk of indemnification claims. These claims may require us to initiate or defend protracted and costly litigation on behalf of our clients, regardless of the merits of these claims and are often not subject to liability limits or exclusion of consequential, indirect or punitive damages. If any of these claims succeed, we may be forced to

23


pay damages on behalf of our clients, redesign or cease offering our allegedly infringing services or solutions, or obtain licenses for the intellectual property such services or solutions allegedly infringe. If we cannot obtain all necessary licenses on commercially reasonable terms, our clients may be forced to stop using our services or solutions.
The holders of patents and other intellectual property rights potentially relevant to our service offerings may make it difficult for us to acquire a license on commercially acceptable terms. In addition, we may be unaware of intellectual property registrations or applications relating to our services that may give rise to potential infringement claims against us. There may also be technologies licensed to and relied on by us that are subject to infringement or other corresponding allegations or claims by third parties, which may damage our ability to rely on such technologies.
Further, our current and former employees and/or subcontractors could challenge our exclusive rights in the software they have developed in the course of their employment. In Russia and certain other countries in which we operate, an employer is deemed to own the copyright in works created by its employees during the course, and within the scope, of their employment, but the employer may be required to satisfy additional legal requirements in order to make further use and dispose of such works. While we believe that we have complied with all such requirements, and have fulfilled all requirements necessary to acquire all rights in software developed by our independent contractors and/or subcontractors, these requirements are often ambiguously defined and enforced. As a result, we cannot assure that we would be successful in defending against any claim by our current or former employees, independent contractors and/or subcontractors challenging our exclusive rights over the use and transfer of works those employees, independent contractors and/or subcontractors created or requesting additional compensation for such works.
Parties making infringement claims may be able to obtain an injunction to prevent us from delivering our services or using technology involving the allegedly infringing intellectual property. Intellectual property litigation is expensive, time-consuming and could divert management’s attention from our business. A successful infringement claim against us, whether with or without merit, could, among others things, require us to pay substantial damages, develop non-infringing technology, or rebrand our name or enter into royalty or license agreements that may not be available on acceptable terms, if at all, and would require us to cease making, licensing or using products that have infringed a third party’s intellectual property rights. Protracted litigation could also result in existing or potential clients deferring or limiting their purchase or use of our software product development services or solutions until resolution of such litigation, or could require us to indemnify our clients against infringement claims in certain instances. Any of these actions, regardless of the outcome of litigation or merits of the claim, could damage our reputation and materially adversely affect our business, financial condition and results of operations.
We are subject to laws and regulations in the United States and other countries in which we operate, including export restrictions, U.S. economic sanctions and the Foreign Corrupt Practices Act, or FCPA, and similar anti-corruption laws. If we are not in compliance with applicable legal requirements, we may be subject to civil or criminal penalties and other remedial measures.
As a company with international operations, we are subject to many laws and regulations restricting our operations, including activities involving restricted countries, organizations, entities and persons that have been identified as unlawful actors or that are subject to U.S. sanctions imposed by the Office of Foreign Assets Control, or OFAC, or other international sanctions that prohibit us from engaging in trade or financial transactions with certain countries, businesses, organizations and individuals. We are subject to the FCPA, which prohibits U.S. companies and their intermediaries from bribing foreign officials for the purpose of obtaining or keeping business or otherwise obtaining favorable treatment, and other laws concerning our international operations. The FCPA’s foreign counterparts contain similar prohibitions, although varying in both scope and jurisdiction and not limited to transactions with government officials. We operate in many parts of the world that have experienced governmental corruption to some degree, and, in certain circumstances, strict compliance with anti-bribery laws may conflict with local customs and practices.

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We have a compliance program with controls and procedures designed to ensure our compliance with the FCPA, OFAC sanctions, and similar sanctions, laws and regulations. The continuing implementation and ongoing development and monitoring of such program may be time consuming and expensive, and could result in the discovery of issues or violations with respect to the foregoing by us or our employees, independent contractors, subcontractors or agents of which we were previously unaware.
Any violations of these or other laws, regulations and procedures by our employees, independent contractors, subcontractors and agents could expose us to administrative, civil or criminal penalties, fines or business restrictions and would adversely affect our reputation and the market for shares of our common stock and may require certain of our investors to disclose their investment in our company under certain state laws.

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Anti-outsourcing legislation and restrictions on immigration, if adopted, may affect our ability to compete for and provide services to clients in the United States or other countries, which could hamper our growth and cause our revenues to decline.
The vast majority of our employees are nationals of CIS and CEE countries.countries, and in 2015, we added significant headcount in India. Some of our projects require a portion of the work to be undertaken at our clients’ facilities, which are sometimes located outside the CIS, CEE and CEE.India. The ability of our employees to work in necessary locations around the United States, Europe, the CIS and CEE, and other countries outside the CIS and CEEworld depends on their ability to obtain the necessaryrequired visas and work permits. Historically, thepermits, and this process for obtaining visas for nationals of CIS and CEE countries to certain countries, including the United States and Europe, has beencan be lengthy and cumbersome.difficult. Immigration laws in the United States and in other countries are subject to legislative change, as well as to variations in standards of application and enforcement due to political forces and economic conditions.
In addition, the issue of companies outsourcing services to organizations operating in other countries is a topic of political discussion in many countries, including the United States, which is our largest source of revenues. Many organizations and public figures in the United States and Europe have publicly expressed concern about a perceived association between offshore outsourcing IT services providers and the loss of jobs in their home countries, and there are legislative measures under consideration in the U.S. Congress and in various state legislatures to address this concern. It is possible that pending legislation in the United States may impose restrictions on our ability to deploy employees holding U.S. work visas to client locations, which could adversely impact our ability to do business in the jurisdictions in which we have clients.business. It is generally difficult to predict the political and economic events that could affect immigration laws, or the restrictive impact they could have on obtaining or maintaining business visas for our employees. However, if enacted, such measures may broaden restrictions on outsourcing by federal and state government agencies and on government contracts with firms that outsource services directly or indirectly, impact private industry with measures such as tax disincentives or intellectual property transfer restrictions, and/or restrict the use of certain work visas.
Our reliance on visas for a number of employees makes us vulnerable to such changes and variations as it affects our ability to staff projects with employees who are not citizens of the country where the work is to be performed. We may not be able to obtain a sufficient number of visas for our employees or we may encounter delays or additional costs in obtaining or maintaining such visas, in which case we may not be able to provide services to our clients on a timely and cost-effective basis or manage our sales and delivery centers as efficiently as we otherwise could, any of which could hamper our growth and cause our revenues to decline.
Similarly, legislation enacted in certain European jurisdictions and any future legislation in European jurisdictions or any other country in which we have clients restricting the performance of services from an offshore location could also materially adversely affect our business, financial condition and results of operations. For example, legislation enacted in the United Kingdom, based on the 1977 EC Acquired Rights Directive, has been adopted in some form by many European Union countries, and provides that if a company outsources all or part of its business to an IT services provider or changes its current IT services provider, the affected employees of the company or of the previous IT services provider are entitled to become employees of the new IT services provider, generally on the same terms and conditions as their original employment. In addition, dismissals of employees who were employed by the company or the previous IT services provider immediately prior to that transfer are automatically considered unfair dismissals that entitle such employees to compensation. As a result, in order to avoid unfair dismissal claims, we may have to offer, and become liable for, voluntary redundancy payments to the employees of our clients who outsource business to us in the United Kingdom and other European Union countries who have adopted similar laws. This legislation could materially affect our ability to obtain new business from companies in the United Kingdom and European Union and to provide outsourced services to companies in the United Kingdom and European Union in a cost-effective manner.

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Our CIS subsidiaries can be forced into liquidation on the basis of formal noncompliance with certain legal requirements.
We operate in CIS countries primarily through locally organized subsidiaries. Certain provisions of Russian law and the laws of other CIS countries may allow a court to order liquidation of a locally organized legal entity on the basis of its formal noncompliance with certain requirements during formation, reorganization or during its operations. If the company fails to comply with certain requirements including those relating to minimum net assets, governmental or local authorities can seek the involuntary liquidation of such company in court, and the company’s creditors will have the right to accelerate their claims or demand early performance of the company’s obligations as well as demand compensation of any damages. If involuntary liquidation of any of our subsidiaries were to occur, such liquidation could materially adversely affect our financial condition and results of operations.

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We may need additional capital, and a failure by us to raise additional capital on terms favorable to us, or at all, could limit our ability to grow our business and develop or enhance our service offerings to respond to market demand or competitive challenges.
We believe that our current cash, cash flow from operations and revolving line of credit are sufficient to meet our anticipated cash needs for at least the next 12 months. We may, however, require additional cash resources due to changed business conditions or other future developments, including any investments or acquisitions we may decide to pursue. If these resources are insufficient to satisfy our cash requirements, we may seek to sell additional equity or debt securities or obtain another credit facility. The sale of additional equity securities could result in dilution to our stockholders. The incurrence of indebtedness would result in increased debt service obligations and could require us to agree to operating and financing covenants that would restrict our operations. Our ability to obtain additional capital on acceptable terms is subject to a variety of uncertainties, including:
investors’ perception of, and demand for, securities of IT services companies;
conditions of the United States and other capital markets in which we may seek to raise funds;
our future results of operations and financial condition;
government regulation of foreign investment in the CIS and CEE and other countries in which we operate or in which we plan to expand; and
economic, political and other conditions both globally and in emerging markets.
Our stock price is volatile.
Our common stock has at times experienced substantial price volatility as a result of variations between our actual and anticipated financial results, announcements by our competitors and us, projections or speculation about our business or that of our competitors by the media or investment analysts or uncertainty about current global economic conditions. The stock market, as a whole, also has experienced extreme price and volume fluctuations that have affected the market price of many technology companies in ways that may have been unrelated to these companies’ operating performance. Furthermore, we believe our stock price should reflect future growth and profitability expectations and, if we fail to meet these expectations, our stock price may significantly decline.
Compliance with changing regulation of corporate governance and public disclosure may result in additional expense and affect our operations.
Changing laws, regulations and standards relating to corporate governance and public disclosure, including the Dodd-Frank Wall Street Reform and Consumer Protection Act, SEC regulations and New York Stock Exchange, or NYSE, rules, are creating uncertainty for companies such as ours. These new or changed laws, regulations and standards are subject to varying interpretations in many cases due to their lack of specificity, and as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies, which could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and corporate governance practices. As a result, our efforts to comply with evolving laws, regulations and standards have resulted in, and are likely to continue to result in, increased general and administrative expenses and a diversion of management time and attention from revenue-generating activities to compliance activities. If our efforts to comply with new or changed laws, regulations and standards differ from the activities intended by regulatory or governing bodies due to ambiguities related to practice, our reputation may be harmed.
Item 1B. Unresolved Staff Comments
None.
Item 2. Properties

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We are incorporated in Delaware with headquarters in Newtown, PA, with multiple delivery centers located in Belarus, Ukraine, Russia, Hungary, Kazakhstan, Bulgaria, China, Armenia, Poland, Czech Republic, Mexico, Austria and Poland,India, and client management locations in the United States, Canada, the United Kingdom, Germany, Sweden, Switzerland, Netherlands, Russia, Kazakhstan, Singapore, Hong Kong and Australia.

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The table below sets forth our principal properties:
Location 
Square Meters
Leased 
 
Square Meters
Owned 
 
Total Square
Meters 
 
Square Meters
Leased 
 
Square Meters
Owned 
 
Total Square
Meters 
Delivery Centers and Client Management Locations:            
Belarus 31,863
 7,655
 39,518
 37,287
 21,669
 58,956
Ukraine 29,366
 
 29,366
 32,452
 
 32,452
Russia 17,775
 
 17,775
 20,399
 
 20,399
Hungary 12,087
 
 12,087
 16,560
 
 16,560
India 11,529
 
 11,529
United States 4,204
 
 4,204
 6,868
 
 6,868
China 2,909
 
 2,909
 5,889
 
 5,889
Poland 4,990
 
 4,990
Kazakhstan 2,894
 
 2,894
 2,735
 
 2,735
Poland 2,515
 
 2,515
Mexico 2,007
 
 2,007
Bulgaria 1,850
 
 1,850
 1,850
 
 1,850
Czech Republic 1,757
 
 1,757
United Kingdom 1,090
 
 1,090
Canada 810
 
 810
 810
 
 810
United Kingdom 617
 
 617
Armenia 302
 
 302
 408
 
 408
Sweden 220
 
 220
 322
 
 322
Switzerland 112
 
 112
 112
 
 112
Germany 28
 
 28
Total 107,524
 7,655
��115,179
 147,093
 21,669
 168,762
Executive Office:            
Newtown, PA, United States 1,050
 
 1,050
 1,050
 
 1,050
Our facilities are used interchangeably among all of our segments. We believe that our existing facilities are adequate to meet our current requirements, and that suitable additional or substitute space will be available, if necessary.
Item 3. Legal Proceedings
From time to time, we are involved in litigation and claims arising out of our operations in the normal course of business. We are not currently a party to any material legal proceeding. In addition, we are not aware of any material legal or governmental proceedings against us, or contemplated to be brought against us.
Item 4. Mine Safety Disclosures
None.
PART II
Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Market Information
Our common stock is traded on the New York Stock Exchange or the NYSE,(NYSE) under the symbol “EPAM.”
Our shares have been publicly traded since February 8, 2012. The following table shows theprice range per share range of highcommon stock presented below represents the highest and lowlowest intraday sales prices for shares of ourthe Company’s common stock as listed for quotation on the NYSE for the quarterly periods indicated.
2014    
Quarter Ended High  Low 
December 31 $52.89
 $40.42
September 30 $44.36
 $36.81
June 30 $45.99
 $29.44
March 31 $46.70
 $31.34

during each quarter of

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the two most recent years.
2013    
2015    
Quarter Ended High  Low  High  Low 
December 31 $39.76
 $32.36
 $84.41
 $67.29
September 30 $35.34
 $25.10
 $76.69
 $63.37
June 30 $27.70
 $20.50
 $74.49
 $57.58
March 31 $23.80
 $18.44
 $63.50
 $45.27
2014    
Quarter Ended High  Low 
December 31 $52.89
 $40.42
September 30 $44.36
 $36.81
June 30 $45.99
 $29.44
March 31 $46.70
 $31.34
As of February 24, 2015,10, 2016, we had approximately 5536 stockholders of record of our common stock. The number of record holders does not include holders of shares in “street name” or persons, partnerships, associations, corporations or other entities identified in security position listings maintained by depositories.
Dividend Policy
We have not declared or paid any cash dividends on our common stock and currently do not anticipate paying any cash dividends in the foreseeable future. Instead, we intend to retain all available funds and any future earnings for use in the operation and expansion of our business. Any future determination relating to dividend policy will be made at the discretion of our board of directors and will depend on our future earnings, capital requirements, financial condition, future prospects, applicable Delaware law, which provides that dividends are only payable out of surplus or current net profits, and other factors that our board of directors deems relevant. In addition, our credit facility restricts our ability to make or pay dividends.dividends (other than certain intercompany dividends) unless no potential or actual event of default has occurred or would be triggered.
Equity Compensation Plan Information
See “Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters” in Part III of this annual report for our equity compensation plan information.
Performance Graph
The following graph compares the cumulative total stockholder return on our common stock with the cumulative total return on the S&P 500 Index and a Peer Group Index (capitalization weighted) for the period beginning February 8, 2012, which is the date of our initial public offering, and ending on the last day of our last completed fiscal year. The stock performance shown on the graph below is not indicative of future price performance. The following performance graph and related information shall not be deemed “soliciting material” or to be “filed” with the SEC, nor shall information be incorporated by reference into any future filing under the Securities Act of 1933 or Securities Exchange Act of 1934, each as amended, except to the extent that we specifically incorporate it by reference into such filing.

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Table of Contents

COMPARISON OF CUMULATIVE TOTAL RETURN (1)(2) 
Among EPAM, the S&P 500 Index and a Peer Group Index(3) (Capitalization Weighted)
 

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Table of Contents

 Company / Index  Company / Index 
Base Period 
EPAM Systems,
Inc. 
 
S&P 500
Index 
 
Peer Group
Index 
 
EPAM Systems,
Inc. 
 
S&P 500
Index 
 
Peer Group
Index 
12/31/2015 $561.57
 $151.41
 $140.47
9/30/2015 $532.29
 $142.23
 $151.74
6/30/2015 $508.79
 $152.83
 $139.89
3/31/2015 $437.79
 $153.18
 $148.89
12/31/2014 $341.07
 $152.52
 $127.74
 $341.07
 $152.52
 $127.74
9/30/2014 $312.79
 $146.10
 $120.55
 $312.79
 $146.10
 $120.55
6/30/2014 $312.50
 $145.21
 $118.41
 $312.50
 $145.21
 $118.41
3/31/2014 $235.00
 $138.70
 $124.76
 $235.00
 $138.70
 $124.76
12/31/2013 $249.57
 $136.92
 $124.18
 $249.57
 $136.92
 $124.18
9/30/2013 $246.43
 $124.56
 $103.03
 $246.43
 $124.56
 $103.03
6/30/2013 $194.14
 $118.99
 $80.39
 $194.14
 $118.99
 $80.39
3/31/2013 $165.93
 $116.24
 $99.89
 $165.93
 $116.24
 $99.89
12/31/2012 $129.29
 $105.65
 $85.86
 $129.29
 $105.65
 $85.86
9/30/2012 $135.29
 $106.72
 $89.48
 $135.29
 $106.72
 $89.48
6/30/2012 $121.36
 $100.90
 $83.91
 $121.36
 $100.90
 $83.91
3/31/2012 $146.57
 $104.33
 $102.94
 $146.57
 $104.33
 $102.94
2/8/2012 $100
 $100
 $100
 $100
 $100
 $100
  
(1)Graph assumes $100 invested on February 8, 2012, in our common stock, the S&P 500 Index, and the Peer Group Index (capitalization weighted).
(2)Cumulative total return assumes reinvestment of dividends.
(3)We have constructed a Peer Group Index of other information technology consulting firms consisting of Virtusa Corporation (NASDAQ:VRTU), Cognizant Technology Solutions Corp. (NASDAQ:CTSH), Infosys Ltd ADR (NYSE:INFY), Sapient Corporation (NASDAQ:SAPE), Syntel, Inc. (NASDAQ:SYNT) and Wipro Ltd. (ADR) (NYSE:WIT).


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Unregistered Sales of Equity Securities
The Company reportedThere were no unregistered sales of equity securities in connection with its acquisitions of Netsoft, GGA and Jointech atby the time of acquisition.   
In addition, in connection withCompany during the Company’s acquisition of all of the outstanding equity of Great Fridays Limited, we issued 90,864 shares of the Company’s common stock as partial purchase price under the stock purchase agreement.  Certain sellers of Great Fridays Ltd. may also potentially receive up to an additional 10,092 shares of the Company’s common stock based on achievement of certain performance metrics measured over the six-month period commencing November 1, 2014. 
All of the shares of common stock issued or issuable in connection with these transactions are restricted securities (as defined in Rule 144 of the Securities Act of 1933, as amended (the “Securities Act”)). No underwriter was involved in these transactions and no underwriting commissions were paid. The transactions were exempt from the registration requirements pursuant to Section 4(a)(2) of the Securities Act, since such transactions did not involve any public offering.year ended December 31, 2015.
Purchases of Equity Securities by the Issuer and Affiliated Purchasers
There were no purchases of equity securities by the issuer and affiliated purchasers during the quarterly period ended December 31, 2014.2015.
Item 6. Selected Financial Data
The following table represents the selected financial data for each of the last five fiscal years. Our historical results are not necessarily indicative of the results to be expected for any future period. The following selected financial data should be read in conjunction with “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our audited consolidated financial statements and related notes included elsewhere in this annual report.

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Year Ended December 31
Year Ended December 31
2014 2013 2012 2011 20102015 2014 2013 2012 2011
(in thousands, except per share data)
(in thousands, except per share data)
Consolidated Income Statement Data:                  
Revenues$730,027
 $555,117
 $433,799
 $334,528
 $221,824
$914,128
 $730,027
 $555,117
 $433,799
 $334,528
Operating expenses:       
  
       
  
Cost of revenues (exclusive of depreciation and amortization)456,530
 347,650
 270,361
 205,336
 132,528
566,913
 456,530
 347,650
 270,361
 205,336
Selling, general and administrative expenses163,666
 116,497
 85,868
 64,930
 47,635
222,759
 163,666
 116,497
 85,868
 64,930
Depreciation and amortization expense17,483
 15,120
 10,882
 7,538
 6,242
17,395
 17,483
 15,120
 10,882
 7,538
Goodwill impairment loss2,241
 
 
 1,697
 

 2,241
 
 
 1,697
Other operating expenses/(income), net3,924
 (643) 682
 19
 2,629
1,094
 3,924
 (643) 682
 19
Income from operations86,183
 76,493
 66,006
 55,008
 32,790
105,967
 86,183
 76,493
 66,006
 55,008
Interest and other income, net4,769
 3,077
 1,941
 1,422
 486
4,731
 4,769
 3,077
 1,941
 1,422
Change in fair value of contingent consideration(1,924) 
 
 
 

 (1,924) 
 
 
Foreign exchange loss(2,075) (2,800) (2,084) (3,638) (2,181)(4,628) (2,075) (2,800) (2,084) (3,638)
Income before provision for income taxes86,953
 76,770
 65,863
 52,792
 31,095
106,070
 86,953
 76,770
 65,863
 52,792
Provision for income taxes17,312
 14,776
 11,379
 8,439
 2,787
21,614
 17,312
 14,776
 11,379
 8,439
Net income$69,641
 $61,994
 $54,484
 $44,353
 $28,308
$84,456
 $69,641
 $61,994
 $54,484
 $44,353
Net income per share of common stock(1):
   
  
  
  
   
  
  
  
Basic (common)$1.48
 $1.35
 $1.27
 $0.69
 $0.84
Basic (puttable common)$
 $
 $
 $1.42
 $0.84
Diluted (common)$1.40
 $1.28
 $1.17
 $0.63
 $0.79
Diluted (puttable common)$
 $
 $
 $0.77
 $0.79
Basic$1.73
 $1.48
 $1.35
 $1.27
 $0.69
Diluted$1.62
 $1.40
 $1.28
 $1.17
 $0.63
Shares used in calculation of net income per share of common stock:   
  
  
  
   
  
  
  
Basic (common)47,189
 45,754
 40,190
 17,094
 17,056
Basic (puttable common)
 
 
 18
 141
Diluted (common)49,734
 48,358
 43,821
 20,473
 19,314
Diluted (puttable common)
 
 
 18
 141
Basic48,721
 47,189
 45,754
 40,190
 17,094
Diluted51,986
 49,734
 48,358
 43,821
 20,473
  
(1)In connection with the completion of our initial public offering, we effected an 8-for-1 common stock split as of January 19, 2012. All historical common stock and per share information has been changed to reflect the common stock split.
  
As of December 31
  2014 2013 2012 2011 2010
  
(in thousands)
Consolidated Balance Sheet Data:          
Cash and cash equivalents $220,534
 $169,207
 $118,112
 $88,796
 $54,004
Accounts receivable, net 124,483
 95,431
 78,906
 59,472
 41,488
Unbilled revenues 55,851
 43,108
 33,414
 24,475
 23,883
Property and equipment, net 55,134
 53,315
 53,135
 35,482
 25,338
Total assets 594,026
 432,877
 350,814
 235,613
 170,858
Accrued expenses and other liabilities 32,203
 20,175
 19,814
 24,782
 15,031
Deferred revenue 3,220
 5,076
 7,632
 6,949
 5,151
Total liabilities 129,976
 56,776
 64,534
 54,614
 35,900
Preferred stock; Series A-1 convertible redeemable preferred stock and Series A-2 convertible redeemable preferred stock 
 
 
 85,940
 68,377
Total stockholders’ equity 464,050
 376,101
 286,280
 95,059
 66,249


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As of December 31
  2015 2014 2013 2012 2011
  
(in thousands)
Consolidated Balance Sheet Data:          
Cash and cash equivalents $199,449
 $220,534
 $169,207
 $118,112
 $88,796
Time deposits 30,181
 
 
 
 
Accounts receivable, net 174,617
 124,483
 95,431
 78,906
 59,472
Unbilled revenues 95,808
 55,851
 43,108
 33,414
 24,475
Property and equipment, net 60,499
 55,134
 53,315
 53,135
 35,482
Total assets 778,536
 594,026
 432,877
 350,814
 235,613
Accrued expenses and other liabilities 60,384
 32,203
 20,175
 19,814
 24,782
Deferred revenue 3,047
 3,220
 5,076
 7,632
 6,949
Total liabilities 165,313
 129,976
 56,776
 64,534
 54,614
Total stockholders’ equity 613,223
 464,050
 376,101
 286,280
 95,059
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations
You should read the following discussion and analysis of our financial condition and results of operations together with our audited consolidated financial statements and the related notes included elsewhere in this annual report. In addition to historical information, this discussion contains forward-looking statements that involve risks, uncertainties and assumptions that could cause actual results to differ materially from management’s expectations. Factors that could cause such differences are discussed in the sections entitled “Special Note Regarding Forward-Looking Statements” and “Item 1A. Risk Factors.” We assume no obligation to update any of these forward-looking statements. Please note that we effected an 8-for-1 common stock split on January 19, 2012, and all historical common stock and per share information has been changed to reflect the common stock split.
Executive Summary
From software products to core business applications, weWe are a leading global provider of expertproduct development and software engineering solutions offering specialized technological consulting development, testing, support and infrastructure services to many of the world’s leading organizations. As we evolveOur clients depend on us to solve their complex technical challenges and rely on our expertise in core engineering, advanced technology, digital engagement and intelligent enterprise development. We are continuously venturing into a global, not just regional, leadernew industries to expand our core industry client base in software and application outsourcing, we recognize that our history, our culture, our delivery model,technology, financial services, media and our people are atentertainment, travel and hospitality, retail and distribution and life sciences and healthcare. Our teams of developers, architects, strategists, engineers, designers, and product experts have the core of what makes us excel in the industry. Wecapabilities and skill sets to deliver complex solutions to clients around the world utilizing our distributed delivery model, which now includes advanced capabilities.business results.
Our delivery focus has not wavered since our inception over 20 years ago, even as our capabilities, tools, and practices have progressed over time. Our delivery evolved to accommodate the needs of our customers across multiple continents and lines of business and to ensure consistent quality in every project deliverable. Our global delivery model and centralized support functions, combined with the benefits of scale from the shared use of fixed-cost resources such as computers and office space, enhance our productivity levels and enable us to better manage the efficiency of our global operations by maintaining adequate resource utilization levels and implementing company-wide cost-management programs.operations. As a result, we have created a delivery base whereby our applications, tools, methodologies and infrastructure allow us to seamlessly deliver services and solutions from our delivery centers to global clients across all geographies, further strengthening our relationships with them.
Through increased specialization in focused verticals and a continued emphasis on strategic partnerships, we are leveraging our roots in software engineering to becomegrow as a recognized brand in ITsoftware development and end-to-end digital transformation services and software development. We are continuously venturing into new industries to expandfor our core industry client base in software and technology, banking and capital markets, business information and media, travel and hospitality. Our clients depend on us to solve complex technical challenges and our teams are integral parts of engineering efforts that cross products and industries.clients.
Overview of 20142015
During the year ended December 31, 2014,2015, total revenues were $730.0$914.1 million, an increase of approximately 31.5%25.2% over $555.1$730.0 million reported for the same period a year ago. Our performance remained strong, driving revenue growthgrew in North America, Europe and EuropeAPAC geographies both organically and through acquisitions. Our performance remained strong across our key verticals, with the Life Sciences and Healthcare vertical emerging rapidly and showing growth of 72.8% during the year ended December 31, 2015, compared to the year ended December 31, 2014.
We remain committed to maintaining and improving a well-balanced portfolio of clients and seek to grow revenues from our existing clients by continually expanding the scope and size of our engagements, as well as by growing our key client base through business development efforts and strategic acquisitions. During 2014,2015, we made progress in this strategy and increased the reach of our offerings, both geographically and across industry verticals. During 2014,2015, our top five and top ten customers accounted for 32.8%32.6% and 43.9%43.8% of consolidated revenues, respectively.
On March 5, 2014, we completed an acquisition of substantially all of the assets and assumed certain specific liabilities of U.S.-based healthcare technology consulting firm Netsoft Holdings LLC and Armenia-based Ozsoft, LLC (collectively, “Netsoft”). Netsoft works with leading health plans in the U.S. on their medical management and claims systems, and specializes in working with leaders in pioneering fields such as accountable care organizations, tele-medicine, healthcare analytics, personalized medicine, health information exchanges, and online self-service capabilities. The Netsoft acquisition added approximately 40 IT professionals to our headcount.
On April 30, 2014, we acquired all of the outstanding equity of Joint Technology Development Limited, a company organized under the laws of Hong Kong, including its wholly-owned subsidiaries Jointech Software (Shenzhen) Co., Ltd., a company organized under the laws of China, and Jointech Software Pte. Ltd., a company organized under the laws of Singapore (collectively, “Jointech”). Jointech provides strategic technology services in the investment banking, wealth and asset management industries. The acquisition of Jointech added over 200 IT professionals to our headcount and significantly extended our footprint in South-East Asia. With this acquisition, we expect to create an integrated global platform focused on serving large multinational customers within the Banking and Financial Services vertical, and extend our global value proposition in the region.

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On June 6, 2014,We continued our growth through strategic acquisitions in 2015.  Through the July 2015 acquisition of NavigationArts we added approximately 90 U.S.-based design consultants to EPAM’s headcount.  The addition of NavigationArts enhances our digital consulting, architecture and content solutions practice. In November 2015, we acquired substantially all of the assets and assumed certain specified liabilities of each of GGA Software Services, LLC, Institute of Theoretical Chemistry, Inc., and GGA’s Russian affiliate (collectively, “GGA”). EstablishedAGS, establishing EPAM’s presence in 1994, GGA develops scientific informatics applications, content databases, algorithms and models; and delivers IT support, maintenance, and quality assurance services to leading healthcare and life sciences companies. The acquisition addedIndia with over 3001,000 IT professionals to enhance our software product development services and over 120 scientists to our highly-experienced employee base and created a significant growth opportunity in the life sciences and healthcare industries. We also see tremendous potential in combining our traditionally recognized strengths with GGA’s algorithm development, mathematical modeling, and sophisticated content database development capabilities. The capability to develop and operationalize platforms, combining tools, models and data, has broad applications across other strategic industries on which EPAM focuses, including the Banking and Financial Services, Business Information and Media, and Retail and Consumer verticals.
On October 31, 2014, we acquired Great Fridays Limited and its subsidiaries to expand our product and design service portfolio. Great Fridays Limited, headquartered in Manchester, UK, with offices in London, San Francisco and New York, focuses on bridging the gap between business and design. The acquisition of Great Fridays added approximately 50 creative design professionals to our headcount.test automation services offerings.  We expect this acquisitionthese investments in EPAM’s strategic growth to further expandresult in expanded service offerings and abilities for our product and design services capabilities.clients.
Summary of Results of Operations and Non-GAAP Financial Measures
The following table presents a summary of our results of operations for the years ended December 31, 2015, 2014 2013 and 2012:2013:
Year Ended December 31,Year Ended December 31,
2014 2013 20122015 2014 2013
(in millions, except percentages) (in millions, except percentages) 
Revenues$730.0
 100.0% $555.1
 100.0% $433.8
 100.0%$914.1
 100.0% $730.0
 100.0% $555.1
 100.0%
Income from operations86.2
 11.8
 76.5
 13.8
 66.0
 15.2
106.0
 11.6
 86.2
 11.8
 76.5
 13.8
Net income69.6
 9.5
 62.0
 11.2
 54.5
 12.6
84.5
 9.2
 69.6
 9.5
 62.0
 11.2
For 2014,2015, we reported results of operations consistent with the continued execution of our strategy. In 2014,During 2015, our operating expenses increased in line with our increase in revenues. Werevenues as we continue to invest in our people, processes and infrastructure to support our goal to deliver high-quality offerings that meet the needs of our customers, differentiate our value proposition from that of our competition, and drive scale and growth.
The key highlights of our consolidated results for 2014 and 20132015 were as follows:
The European segment continued its strong performance, generating revenue growth of $95.1$101.2 million during the year ended December 31, 2014,2015, or 46.6%33.8% over 2013;2014;
Revenue increased in all our key verticals in 20142015 as compared to 2013,2014, specifically within the BankingSoftware and Financial ServicesHi-Tech and Travel and Consumer verticals, which grew $59.1$35.0 million and $40.5$57.5 million respectively.
Income from operations grew 23.0% during the year ended December 31, 2015, over 2014, while income from operations as a percentage of revenues decreased by 0.2%. The slight decrease was due to a combination of factors, including an increase of $21.2 million in stock-based compensation expense driven by increases in headcount and acquisitions.
Net income increased by 21.3% during 2015 compared with 2014. Expressed as a percentage of revenues, net income remained consistent despite the adverse effect of a higher effective tax rate and significant foreign exchange rate changes in 2015 as compared to 2014.
Our organic growth was complemented by fourtwo strategic acquisitions completed during 2014,2015, which expanded our highly skilled employee base, geographic footprint and service capabilities. Through acquisitions, we added capabilities in the healthcare and life sciences industries, forming a foundation for emerging verticals.
Income from operations grew by 12.7% for the year ended December 31, 2014, compared with 2013 while income from operations as a percentage of revenues decreased by 2.0%. The decrease was due to a combination of factors, including an increase of $11.5 million in stock-based compensation expense, a $2.6 million increase in amortization and depreciation expenses related to our 2014 acquisitions, a $2.6 million write-down of prepaid assets to adjust the book value of prepaid construction costs to an estimated recoverable amount and a $1.1 million write-down of construction in progress costs,digital design as well as a $2.2 million write off due to goodwill impairmentdelivery center in the Russia segment.
Net income increased by 12.3% during 2014 compared with 2013. Expressed as a percentage of revenues, net income decreased by 1.7% due to the items noted above, as well as the effects of significant adverse foreign exchange rate changes to several currencies, specifically the Russian ruble, in 2014 as compared to 2013.India.
The operating results in any period are not necessarily indicative of the results that may be expected for any future period.

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In our quarterly earnings press releases and conference calls, we discuss the following key measures that are not calculated according to U.S.GAAP:
Non-GAAP income from operations is the income from operations as reported on our consolidated statements of income and comprehensive income exclusive of certain expenses and benefits.
Non-GAAP operating margin is the non-GAAP income from operations as a percentage of reported revenues.
We believe that these non-GAAP measures help illustrate trends in our core business and we use these measures to establish budgets and operational goals, manage our business and evaluate our performance. We exclude certain expenses and benefits from non-GAAP income from operations that we believe are not reflective of these underlying business trends and are not useful measures in determining our operational performance and overall business strategy. Because our reported non-GAAP financial measures are not calculated according to GAAP, these measures are not comparable to GAAP and may not be comparable to similarly described non-GAAP measures reported by other companies within our industry. Consequently, our non-GAAP financial measures should not be evaluated in isolation from or supplant comparable GAAP measures, but, rather, should be considered together with our financial statements, which are prepared according to GAAP. The following table presents a reconciliation of income from operations as reported on our consolidated statements of income and comprehensive income to non-GAAP income from operations and non-GAAP operating margin for the years ended December 31, 2014, 2013 and 2012:
  For the Years Ended December 31,
  2014 2013 2012
  (in thousands, except percent)
GAAP income from operations $86,183
 $76,493
 $66,006
Stock-based compensation expense 24,620
 13,150
 6,826
Amortization of purchased intangible assets 5,349
 2,785
 1,024
Acquisition-related costs 904
 218
 500
Goodwill impairment loss 2,241
 
 
Other expenses/(income) and one-time items 3,845
 (807) 584
Non-GAAP income from operations $123,142
 $91,839
 $74,940
       
GAAP operating margin 11.8% 13.8% 15.2%
Effect of the adjustments detailed above 5.1
 2.7
 2.1
Non-GAAP operating margin 16.9% 16.5% 17.3%
From time to time, we acquire businesses and as such incur operating expenses, which are not related to our core company or segment operations and may include acquisition-related costs and amortization of acquired intangible assets. These costs vary with the size and complexity of the related acquisition and are generally inconsistent in amount and frequency, therefore, the size, complexity and volume of past acquisitions, which often drive the magnitude of acquisition-related costs, may not be indicative of the size, complexity and volume of future transactions and costs.
Amortization of purchased intangible assets is excluded from our non-GAAP measures to allow management to evaluate our operating results as if these assets have been developed internally rather than acquired in a business combination. We believe this approach provides a supplemental measure of performance in which the acquired intangible assets are treated in a manner comparable to the internally developed assets.
Stock-based compensation expense is excluded from our non-GAAP measures because we believe such exclusion allows for a more accurate comparison of our operating results among the periods, as well as enhances comparability with operating results of peer companies.
We also exclude certain other expenses and one-time charges that we believe are not indicative of what we consider to be organic continuing operations. Such items include impairment write-offs of goodwill and other assets, legal settlement expenses, and certain other non-cash one-time charges and write offs.
See our “Results of Operations” section below for a more detailed discussion and analysis of these charges.
We have significant international operations, and we earn revenues and incur expenses in multiple currencies. When important to management’s analysis, operating results are compared in “constant currency terms”, a non-GAAP financial

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measure that excludes the effect of foreign currency exchange rate fluctuations. The effect of rate fluctuations is excluded by translating the current period’s revenues and expenses into U.S. dollars at the weighted average exchange rates of the prior period of comparison. See Item 7A, “Quantitative and Qualitative Disclosures About Market Risk” of this report for a discussion of our exposure to exchange rates.


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Effects of Inflation
Economies in CIS countries, such asparticularly Belarus, Russia, Kazakhstan and Ukraine, have periodically experienced high rates of inflation. Periods of higher inflation may slow economic growth in those countries and as a result decrease demand for our services and negatively impact the business of our existing clients. Inflation is likely to increase some of our expenses, which may reduce our profitability, as we may not be able to pass these increases on to our clients. Generally, our largest expense that could be impacted by inflation is wages. We do not rely on borrowed funds for operations in those locations; therefore, increases in interest rates typical for inflationary environments do not currently pose a risk to our business.
Ukraine has been experiencing heightened political and economic turmoil with no improvement as of the date of this report. Various news sources estimate that inflation has been increasing and the rate of increase has been accelerating throughout 2014. According to news reports, the peace talks continue and efforts to improve the government are in progress, however, the cost of the continuing crisis isreport, severely impacting the Ukrainian economy. The Ukrainian currency has been weakened and the negative outlook in the Ukrainian economy continues. The functional currency for financial reporting purposesWe have not seen a significant impact from the inflation in Ukraine is US dollars.
Due to Russia’s annexation of Crimea, which was a part of Ukraine, the United States and the European Union have imposed and expanded sanctions targeting Russian government and government-controlled interests and certain government officials. The expanded sanctions issued by the US Department of Treasury and the European Union also restrict involvement in certain extensions of credit and financing activities for Russian debtors and restrict certain business activities in sectors such as off-shore oil and defense. We believe these sanctionsUkraine. Additionally, we do not prevent us from providinghave clients located in Ukraine.
Inflation in Russia increased late in 2014 due to weakening of the Russian ruble and decreasing oil prices. During 2015, inflation in Russia remained steady with some decline observed in recent months. Our operations in Russia have not been affected directly by local inflation; however, we have noted some decline in demand for our services toby our customers.
In February 2014, the government of Kazakhstan devalued the local currency, the tenge, by 19%. The government kept inflation for 2014 within forecasted range of 6% to 8% with forecast of around 7% for 2015 with a steady decrease towards 6% later that year. However, political and economic instabilityclients in the region may contribute to the economic uncertainty in Kazakhstan.Russia.
Belarus has been experiencing hyperinflation over the last several years has been experiencing hyperinflation.years. The measures currently used by the Belarusian government to control this recent inflation include monetary policy and pricing instruments, including increasing interest rates and the use of anti-monopoly laws to prevent the increase in pricing of goods, as well as privatization and using foreign borrowings to replenish the budget and stabilize the local currency. Inflation, government actions to combat inflation and public speculation about possible additional actions have also contributed to economic uncertainty in Belarus. Belarus may experience high levels of inflation in the future. ForWe have not seen a significant impact from the inflation in Belarus as our largest expense there, wages, is denominated in U.S. dollars in order to provide stability in our business and for our employees. Additionally, we do not have significant clients located in Belarus and for the year ended December 31, 2014,2015, we had approximately $1.5, or 0.2%, of our revenues denominated in Belarusian rubles. The functional currency for financial reporting purposes in Belarus is US dollars.
Other locations where we have clients or perform services are not experiencing significant inflation and our business is not materially impacted by inflation in those locations.
Periods of higher inflation may slow economic growth in those countries. Inflation also is likely to increase some of our costs and expenses, which we may not be able to pass on to our clients and, as a result, may reduce our profitability. Inflationary pressures could also affect our ability to access financial markets and lead to counter-inflationary measures that may harm our financial condition, results of operations or adversely affect the market price of our securities.

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Results of Operations
The following table sets forth a summary of our consolidated results of operations for the periods indicated. This information should be read together with our consolidated financial statements and related notes included elsewhere in this annual report. The operating results in any period are not necessarily indicative of the results that may be expected for any future period.

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Year Ended December 31,Year Ended December 31,
2014 2013 20122015 2014 2013
(in thousands, except percentages)(in thousands, except percentages)
Revenues$730,027
 100.0 % $555,117
 100.0 % $433,799
 100.0 %$914,128
 100.0 % $730,027
 100.0 % $555,117
 100.0 %
Operating expenses:         
           
  
Cost of revenues (exclusive of depreciation and amortization)(1)
456,530
 62.5
 347,650
 62.6
 270,361
 62.3
566,913
 62.0
 456,530
 62.5
 347,650
 62.6
Selling, general and administrative expenses(2)
163,666
 22.4
 116,497
 21.0
 85,868
 19.8
222,759
 24.4
 163,666
 22.4
 116,497
 21.0
Depreciation and amortization expense17,483
 2.4
 15,120
 2.7
 10,882
 2.5
17,395
 1.9
 17,483
 2.4
 15,120
 2.7
Goodwill impairment loss2,241
 0.3
 
 
 
 

 
 2,241
 0.3
 
 
Other operating expenses, net3,924
 0.6
 (643) (0.1) 682
 0.2
1,094
 0.1
 3,924
 0.6
 (643) (0.1)
Income from operations86,183
 11.8
 76,493
 13.8
 66,006
 15.2
105,967
 11.6
 86,183
 11.8
 76,493
 13.8
Interest and other income, net4,769
 0.7
 3,077
 0.5
 1,941
 0.5
4,731
 0.5
 4,769
 0.7
 3,077
 0.5
Change in fair value of contingent consideration(1,924) (0.3) 
 
 
 

 
 (1,924) (0.3) 
 
Foreign exchange loss(2,075) (0.3) (2,800) (0.5) (2,084) (0.5)(4,628) (0.5) (2,075) (0.3) (2,800) (0.5)
Income before provision for income taxes86,953
 11.9
 76,770
 13.8
 65,863
 15.2
106,070
 11.6
 86,953
 11.9
 76,770
 13.8
Provision for income taxes17,312
 2.4
 14,776
 2.6
 11,379
 2.6
21,614
 2.4
 17,312
 2.4
 14,776
 2.6
Net income$69,641
 9.5 % $61,994
 11.2 % $54,484
 12.6 %$84,456
 9.2 % $69,641
 9.5 % $61,994
 11.2 %
  

(1)Included $13,695, $8,648 $4,823 and $2,809$4,823 of stock-based compensation expense for the years ended December 31, 2015, 2014 2013 and 2012,2013, respectively;
(2)Included $32,138, $15,972 $8,327 and $4,017$8,327 of stock-based compensation expense for the years ended December 31, 2015, 2014 2013 and 2012,2013, respectively.
Revenues
Our revenues are derived primarily from providing software development services to our clients. We discuss below the breakdown of our revenue by service offering, vertical, client location, contract type and client concentration. Revenues consist of ITinclude revenue from services revenues andas well as reimbursable expenses and other revenues, which primarily includeconsist of travel and entertainment costs that are chargeable to clients.
Revenues by Service Offering
Software development includes software product development, custom application development services and enterprise application platforms services, and has historically represented,represents our core competency and we expect to continue to represent, thea substantial majority of our business. The following table sets forth revenues by service offering by amount and as a percentage of our revenues for the periods indicated:
Year Ended December 31,Year Ended December 31,
2014 2013 20122015 2014 2013
Software development$504,590
 69.1% $374,426
 67.4% $290,139
 66.8%$644,732
 70.6% $504,590
 69.1% $374,426
 67.4%
Application testing services140,363
 19.2
 109,222
 19.7
 85,849
 19.8
174,259
 19.1
 140,363
 19.2
 109,222
 19.7
Application maintenance and support58,840
 8.1
 45,971
 8.3
 36,056
 8.3
70,551
 7.7
 58,840
 8.1
 45,971
 8.3
Infrastructure services14,198
 1.9
 14,433
 2.6
 12,424
 2.9
11,311
 1.2
 14,198
 1.9
 14,433
 2.6
Licensing3,626
 0.5
 3,439
 0.6
 2,914
 0.7
3,764
 0.4
 3,626
 0.5
 3,439
 0.6
Reimbursable expenses and other revenues8,410
 1.2
 7,626
 1.4
 6,417
 1.5
9,511
 1.0
 8,410
 1.2
 7,626
 1.4
Revenues$730,027
 100.0% $555,117
 100.0% $433,799
 100.0%$914,128
 100.0% $730,027
 100.0% $555,117
 100.0%

32

Table of Contents

Revenues by Vertical
We analyze our revenue by separating our clients into fourfive main industry sectors or verticals as detailed in the following table. Also, we serve clients in other industries such as oil and gas, telecommunications, healthcare, life sciences, retail, insurance and several others, which are currently reported in aggregate under Other verticals.Emerging Verticals. The following table sets

36


forth revenues by vertical by amount and as a percentage of our revenues for the periods indicated:
 Year Ended December 31,
 2014 2013 2012
Banking and Financial Services$215,425
 29.5% $156,340
 28.2% $111,941
 25.8%
ISVs and Technology157,944
 21.6
 134,970
 24.3
 106,852
 24.6
Travel and Consumer157,756
 21.6
 117,248
 21.1
 95,965
 22.1
Business Information and Media91,726
 12.6
 75,677
 13.6
 62,398
 14.4
Other98,766
 13.5
 63,256
 11.4
 50,226
 11.6
Reimbursable expenses and other revenues8,410
 1.2
 7,626
 1.4
 6,417
 1.5
Revenues$730,027
 100.0% $555,117
 100.0% $433,799
 100.0%
 Year Ended December 31,
 2015 2014 2013
Financial Services$248,526
 27.2% $215,425
 29.5% $156,340
 28.2%
Travel and Consumer215,303
 23.6
 157,756
 21.6
 117,248
 21.1
Software & Hi-Tech192,989
 21.1
 157,944
 21.6
 134,970
 24.3
Media & Entertainment120,616
 13.2
 91,726
 12.6
 75,677
 13.6
Life Sciences and Healthcare73,327
 8.0
 42,428
 5.8
 14,079
 2.5
Emerging Verticals53,856
 5.9
 56,338
 7.7
 49,177
 8.9
Reimbursable expenses and other revenues9,511
 1.0
 8,410
 1.2
 7,626
 1.4
Revenues$914,128
 100.0% $730,027
 100.0% $555,117
 100.0%
Revenues by Client Location
Our revenues are sourced from threefour geographic markets: North America, Europe, CIS and CIS. In 2014,APAC, which we established as a new geographic market in the APAC region2014 as a result of an acquisition. We present and discuss our revenues by client location based on the location of the specific client site that we serve, irrespective of the location of the headquarters of the client or the location of the delivery center where the work is performed. Revenue by client location is different from the revenue by reportable segment in our audited consolidated financial statements included elsewhere in this annual report. Segments are not based on the geographic location of the clients but are rather based on the geography of the management responsible for a particular client regardless of client'sthe client’s physical location. The following table sets forth revenues by client location by amount and as a percentage of our revenues for the periods indicated:
Year Ended December 31,Year Ended December 31,
2014 2013 20122015 2014 2013
North America$367,498
 50.4% $281,738
 50.8% $206,901
 47.7%$485,075
 53.1% $367,498
 50.4% $281,738
 50.8%
Europe284,853
 39.0
 200,137
 36.1
 155,168
 35.8
352,489
 38.6
 284,853
 39.0
 200,137
 36.1
United Kingdom141,366
 19.4
 108,892
 19.6
 98,346
 22.7
164,301
 18.0
 141,366
 19.4
 108,892
 19.6
Switzerland87,111
 11.9
 51,941
 9.4
 30,120
 6.9
111,353
 12.2
 87,111
 11.9
 51,941
 9.4
Other56,376
 7.7
 39,304
 7.1
 26,702
 6.2
76,835
 8.4
 56,376
 7.7
 39,304
 7.1
CIS55,807
 7.6
 65,616
 11.7
 65,313
 15.0
43,043
 4.7
 55,807
 7.6
 65,616
 11.7
Russia48,945
 6.7
 53,328
 9.6
 47,536
 11.0
36,506
 4.0
 48,945
 6.7
 53,328
 9.6
Other6,862
 0.9
 12,288
 2.1
 17,777
 4.0
6,537
 0.7
 6,862
 0.9
 12,288
 2.1
APAC13,459
 1.8
 
 
 
 
24,010
 2.6
 13,459
 1.8
 
 
Reimbursable expenses and other revenues8,410
 1.2
 7,626
 1.4
 6,417
 1.5
9,511
 1.0
 8,410
 1.2
 7,626
 1.4
Revenues$730,027
 100.0% $555,117
 100.0% $433,799
 100.0%$914,128
 100.0% $730,027
 100.0% $555,117
 100.0%
Revenues by Contract Type
Our services are performed under both time-and-material and fixed-price arrangements. Our engagement models depend on the type of services provided to a client, the mix and locations of professionals involved and the business outcomes our clients are looking to achieve. Historically, the vast majority of our revenues have been generated under time-and-material contracts. Under time-and-material contracts, we are compensated for actual time incurred by our IT professionals at negotiated hourly, daily or monthly rates. Fixed-price contracts require us to perform services throughout the contractual period and we are paid in installments on pre-agreed intervals. We expect time-and-material arrangements to continue to comprise the majority of our revenues in the future.

33


The following table sets forth revenues by contract type by amount and as a percentage of our revenues for the periods indicated:

37


Year Ended December 31,Year Ended December 31,
2014 2013 20122015 2014 2013
Time-and-material$618,725
 84.7% $456,938
 82.3% $364,853
 84.1%$784,153
 85.8% $618,725
 84.7% $456,938
 82.3%
Fixed-price99,266
 13.6
 87,114
 15.7
 59,615
 13.7
116,700
 12.8
 99,266
 13.6
 87,114
 15.7
Licensing3,626
 0.5
 3,439
 0.6
 2,914
 0.7
3,764
 0.4
 3,626
 0.5
 3,439
 0.6
Reimbursable expenses and other revenues8,410
 1.2
 7,626
 1.4
 6,417
 1.5
9,511
 1.0
 8,410
 1.2
 7,626
 1.4
Revenues$730,027
 100.0% $555,117
 100.0% $433,799
 100.0%$914,128
 100.0% $730,027
 100.0% $555,117
 100.0%
Revenues by Client Concentration
We have grown our revenues from our clients by continually expanding the scope and size of our engagements, and we have grown our key client base through internal business development efforts and several strategic acquisitions.
Our focus on delivering quality to our clients is reflected by an average of 93.1%95.1% and 81.5%84.3% of our revenues in 20142015 coming from clients that had used our services for at least one and two years, respectively. In addition, we have significantly grown the size of existing accounts. The number of clients that accounted for over $5.0 millionaccounts including growth in annual revenues increased to 24 in 2014 from 10 in 2010,our top five and the number of clients that generated at least $0.5 million in revenues increased to 181 in 2014 from 72 in 2010.
top ten clients. The following table sets forth revenues contributed by our top one, top five and top ten clients by amount and as a percentage of our revenues for the periods indicated:
Year Ended December 31,Year Ended December 31,
2014 2013 20122015 2014 2013
Top client$97,639
 13.4% $53,136
 9.6% $39,854
 9.2%$129,818
 14.2% $97,639
 13.4% $53,136
 9.6%
Top five clients239,396
 32.8
 169,987
 30.6
 134,484
 31.0
298,063
 32.6
 239,396
 32.8
 169,987
 30.6
Top ten clients320,126
 43.9
 234,955
 42.3
 192,426
 44.4
400,250
 43.8
 320,126
 43.9
 234,955
 42.3
Operating Expenses
Cost of Revenues (Exclusive of Depreciation and Amortization)
The principal components of our cost of revenues (exclusive of depreciation and amortization) are salaries, employee benefits, stock compensation expense, travel costs and subcontractor fees for IT professionals and subcontractors that are assigned to client projects. Salaries and other compensation expenses of our IT professionals are reported as cost of revenue regardless of whether theythe employees are actually performing client services during a given period.
The cost of revenues are dependent on utilization levels. Our ability toWe manage ourthe utilization levels depends significantly onof our ability to hireprofessionals through hiring and traintraining high-performing IT professionals and to staff projects appropriately.efficient staffing of projects. Our staff utilization also depends on the general economy and its effect on our clients and their business decisions regarding the use of our services. Some of our IT professionals are specifically hired and trained to work for specific clients or on specific projects, and some of our offshore development centers are dedicated to specific clients or specific projects.
Selling, General and Administrative Expenses
Selling, general and administrative expenses represent expenses associated with promoting and selling our services and general administrative functions of our business. These expenses include senior management, administrative personnel and sales and marketing personnel salaries; stock compensation expense, related fringe benefits, commissions and travel costs for those employees; legal and audit expenses, insurance, operating lease expenses, and the cost of advertising and other promotional activities. In addition, we pay a membership fee of 1% of revenues collected in Belarus to the administrative organization of the Belarus Hi-Tech Park.
Our selling, general and administrative expenses have increased primarily as a result of our expanding operations, acquisitions, and the hiring of a number of senior managers to support our growth. We expect our selling, general and administrative expenses to continue to increase in absolute terms as our business expands but will generally remain steady or slightly decrease as a percentage of our revenues.


3834



Provision for Income Taxes
Determining the consolidated provision for income tax expense, deferred income tax assets and liabilities and related valuation allowance, if any, involves judgment. As a global company, we are required to calculate and provide for income taxes in each of the jurisdictions in which we operate. During 2015, 2014 2013 and 2012,2013, we had $113.8 million, $94.2 $69.8 million, and $56.6$69.8 million, respectively, in income before provision for income taxes attributed to our foreign jurisdictions. The statutory tax rate in our foreign jurisdictions is lower than the statutory U.S. tax rate. Additionally, we have secured special tax benefits in Belarus and Hungary as described below. As a result, our provision for income taxes is low in comparison to income before taxes due tobecause of the benefit received from increased income earned in low tax jurisdictions. The foreign tax rate differential represents this significant reduction. Changes in the geographic mix or estimated level of annual pre-tax income can also affect our overall effective income tax rate.
Our provision for income taxes also includes the impact of provisions established for uncertain income tax positions, as well as the related net interest. Tax exposures can involve complex issues and may require an extended period to resolve. Although we believe we have adequately reserved for our uncertain tax positions, we cannot assure you that the final tax outcome of these matters will not be different from our current estimates. We adjust these reserves in light of changing facts and circumstances, such as the closing of a tax audit, statute of limitation lapse or the refinement of an estimate. To the extent that the final tax outcome of these matters differs from the amounts recorded, such differences will impact the provision for income taxes in the period in which such determination is made.
Our subsidiary in Belarus is a member of the Belarus Hi-Tech Park, in which member technology companies are 100% exempt from the current Belarusian income tax rate of 18%. The “On High-Technologies Park” Decree, which created the Belarus Hi-Tech Park, is in effect for a period of 15 years from July 1, 2006.
2015 Compared to 2014
During 2015, our revenues grew 25.2% over 2014, from $730.0 million to a record $914.1 million. The increase was attributable to a combination of factors, including deeper penetration to existing customers and attainment of new customers, both organically and through acquisitions. In 2015, revenue from new customers was $45.7 million, primarily resulting from our acquisitions in 2015, and does not include new clients that are affiliates of existing customers whom we consider an expansion of existing business. In addition, total revenues in 2015 and 2014 included $9.5 million and $8.4 million of reimbursable expenses and other revenues, respectively, which increased by 13.1% in 2015 as compared to 2014, but remained relatively flat as a percentage of revenues.
During the year ended December 31, 2015, revenues in our largest geography, North America, grew $117.6 million, or 32.0%, as compared with the year ended December 31, 2014. Expressed as a percentage of consolidated revenues, the North America geography accounted for 53.1% in 2015, which represented an increase of 2.7% over 2014. The increase was primarily a result of growth in business from several of our top clients as well as new revenue from the acquisition of NavigationArts.
Revenues from all major verticals in North America grew during the year ended December 31, 2015 as compared with the year ended December 31, 2014. The largest contributor to revenue growth in North America, was Travel and Consumer vertical, which increased $32.9 million, or 48.6%, as compared with the year ended December 31, 2014. The increase in this vertical was primarily driven by the rapid expansion of our strategic relationship with a large retail chain, a relationship we acquired in 2012.
Our subsidiaryLife Sciences and Healthcare vertical in Hungary benefitsNorth America continued its impressive growth since we acquired new clients in the healthcare, insurance and life sciences industries in one of our 2014 acquisitions and created synergies with existing customers in those markets. During the year ended December 31, 2015 combined revenue growth from customers in this vertical accounted for $29.0 million, representing the largest percentage growth of all North America's verticals at 75.9% growth over prior year.
During the year ended December 31, 2015, revenues from the Media and Entertainment vertical in North America increased by $25.3 million, or 36.2%, as compared with the year ended December 31, 2014. The growth in this vertical in 2015 was attributable to resumed growth in revenues from certain long-time major customers who had decreased demand for our services in prior years.
North America’s largest vertical, Software and Hi-Tech, experienced growth of $24.5 million or 17.2% during the year ended December 31, 2015 as compared with the year ended December 31, 2014.

35


During the year ended December 31, 2015, our Financial Services vertical remained our dominant vertical in the European geography. In 2015 revenues from the Financial Services vertical increased by $28.3 million, or 19.0%, respectively, over the corresponding period of 2014. Continued solid performance of the Financial Services vertical was attributable to an increased demand for our services and ongoing relationships with existing top customers located in Europe. We experienced increased business from our top customer located in Switzerland, who was responsible for majority of the revenue growth in the Financial Services vertical during 2015 as compared with the year ended December 31, 2014. Furthermore, we continue to see growing demand for our services from European-based customers within the Travel and Consumer vertical. During the year ended December 31, 2015 revenues from this vertical increased by $24.0 million as compared with the year ended December 31, 2014 and accounted for 35.5% of total growth in this geography during period indicated. Europe’s Software and Hi-Tech vertical experienced a significant increase of 66.5% in 2015 compared to 2014, in part due to business from a tax creditnew significant customer in Germany engaged in 2015.
Revenues in the CIS geography showed a decrease of 10%$12.8 million or 22.9% on a year-to-date bases compared to 2014. The decrease in revenues was primarily attributable to a decline in the Financial Services vertical, which is significantly impacted by the microeconomic situation in the region. Additionally, significant foreign currency fluctuations in Russia and CIS countries had a material negative impact on the revenues from those locations.
Cost of annual qualifiedRevenues (Exclusive of Depreciation and Amortization)
During the years ended December 31, 2015 and 2014, cost of revenues (exclusive of depreciation and amortization) was $566.9 million and $456.5 million, respectively, representing an increase of 24.2% for the year ended December 31, 2015 over the corresponding period of 2014, mainly due to an increase in headcount of revenue producing personnel. As a percentage of revenues, cost of revenues (exclusive of depreciation and amortization), decreased 0.5% over the corresponding period of 2014, to 62.0% of consolidated revenues.
The increase in cost of revenues (exclusive of depreciation and amortization) in 2015 was primarily driven by an increase $107.1 million in compensation costs for revenue producing personnel, including an increase in stock-based compensation expense of $5.0 million. The increases in all of these costs were the result of organic increase in headcount as well as personnel additions from acquisitions.
Selling, General and Administrative Expenses
We continued to invest in key areas including sales, infrastructure, industry expertise, and other functions supporting global operations and our growth. During the year ended December 31, 2015, selling, general and administrative expenses totaled $222.8 million, representing an increase of 36.1% from $163.7 million during 2014. As a percentage of revenue, selling, general and administrative expenses represent 24.4% of consolidated revenues, an increase of 2.0% over last year. The increase in selling, general and administrative expenses in 2015 was primarily driven by a $48.5 million increase in personnel-related costs, which includes salaries taken overand stock-based compensation expenses. Of these personnel-related costs, stock-based compensation expenses increased $16.2 million during the year ended December 31, 2015. Our selling, general and administrative expenses have increased primarily as a four-year period, for upresult of our expanding operations, acquisitions, and the hiring of a number of senior managers to 70%support our growth.
In addition, we have issued stock to the sellers and/or personnel in connection with our business acquisitions and have been recognizing stock-based compensation expense in the periods after the closing of these acquisitions as part of the selling, general and administrative expenses. Such stock based compensation expenses related to acquisitions comprised 58.2% of total tax dueselling, general and administrative stock-based compensation expense for that period. We have been able to take the full 70% credit for 2007 to 2012. The Hungarian tax authorities repealed the tax credit beginning with 2012. Credits earned in years prior to 2012, however, were allowed through 2014. We have utilized upyear ended December 31, 2015 compared to the 70% limit untilsame period in 2014.
Our domesticDepreciation and Amortization Expense
Depreciation and amortization expense was $17.4 million in 2015, representing a decrease of $0.1 million over 2014. Expressed as a percentage of revenues, depreciation and amortization expense totaled 1.9% and decreased 0.5% compared with 2014. Expense includes amortization of acquired intangible assets, all of which have finite useful lives.
Other Operating Expenses, Net
During the year ended December 31, 2015, other operating expenses decreased $2.8 million since 2014 to $1.1 million.

36


Interest and Other Income, Net
Net interest and other income beforewas $4.7 million in 2015, representing a slight decrease of 0.8% from $4.8 million received in 2014. The income consists primarily of interest received on cash accounts in Belarus and, to a lesser extent, interest earned on employee housing loans.
Provision for Income Taxes
The Company’s provision for income taxes differswas $21.6 million in 2015 and $17.3 million in 2014. The effective tax rate increased to 20.4% in 2015 from 19.9% in 2014 primarily due to changes in the North America segment income before provision for income taxes because segment operating profit is a management reporting measure, which does not take into account most corporate expenses,geographic mix of our current year earnings and discrete tax benefits recorded in 2014 as well as the majoritydue to elimination of non-operating costs and stock compensation expenses. We do not hold our segment managers accountable for these expenses, as they cannot influence these costs within the scope of their operating authority, nor do we believe it is practical to allocate these costs to specific segments, as they are not directly attributable to any specific segment. All our segments are treated consistently with respect to such expenses when determining segment operating profit.certain income tax holiday benefits in Hungary in 2015.
2014 Compared to 2013
During 2014, our revenues grew in excess of 30.0% over 2013, from $555.1 million to a record $730.0 million.$730.0 million. The increase was attributable to a combination of factors, including deeper penetration to existing customers and attainment of new customers, both organically and through acquisitions. In 2014, revenue from new customers was $49.7 million, primarily resulting from our 2014 acquisitions, and does not include new clients that are affiliates of existing customers. Our 2014 acquisitions increased our total revenues by $39.8 million, however, some of the acquired clients are affiliated with our existing clients and, therefore, we consider them an expansion of existing business. In addition, total revenues in 2014 and 2013 included $8.4 million and $7.6 million of reimbursable expenses and other revenues, respectively, which increased by 10.3% in 2014 as compared to 2013, but remained relatively flat as a percentage of revenues.
During the year ended December 31, 2014, revenues in our largest geography, North America, grew $85.8$85.8 million,, or 30.4%, as compared with the year ended December 31, 2013. Expressed as a percentage of consolidated revenues, the North America geography accounted for 50.4% in 2014, which represented a decrease of 0.4% over 2013. The slight decrease was primarily a result of accelerated growth in the European geography.
Revenues from all verticals in North America grew during the year ended December 31, 2014 as compared with the year ended December 31, 2013. The largest growth was in the North America'sAmerica’s Other vertical due to acquiring new clients in the healthcare, insurance and life sciences industries through a 2014 acquisition as well as creating synergies with existing customers in those markets. During the year ended December 31, 2014 combined revenue growth from customers in the Other vertical accounted for $33.8$33.8 million,, representing a 94.3%, growth over prior year.
Our Travel and Consumer vertical in North America geography increased by $15.0$15.0 million,, or 28.4%, as compared with the year ended December 31, 2013. The increase in this vertical was primarily driven by the rapid expansion of our strategic

39


relationship with a large retail chain, a relationship we acquired in 2012. During the year ended December 31, 2014, revenues from the Business Information and Media vertical in North America increased by $12.5$12.5 million,, or 21.8%, as compared with the year ended December 31, 2013. The growth in this vertical in 2014 was attributable to resumed growth in revenues from certain long-time major customers who had decreased demand for our services in 2013. North America'sAmerica’s largest vertical, ISVs and Technology, experienced growth of $19.8 million or 16.2% during the year ended December 31, 2014 as compared with the year ended December 31, 2013.
During the year ended December 31, 2014, our Banking and Financial Services vertical remained our dominant vertical in Europe geography. In 2014 revenues from the Banking and Financial Services vertical increased by $42.5$42.5 million,, or 39.9%, respectively, over the corresponding periods of 2013. Continued solid performance of the Banking and Financial Services vertical was attributable to an increased demand for our services and ongoing relationships with existing top customers located in Europe. We experienced increased business from our top customer located in Switzerland, nearly doubling the revenue during 2014 as compared with the year ended December 31, 2013. Furthermore, we continue to see growing demand for our services from European-based customers within the Travel and Consumer and Business Information and Media verticals. During the year ended December 31, 2014 combined revenues from these verticals increased by $30.9$30.9 million,, respectively, year ended December 31, 2014 and accounted for 36.4% of total growth in this geography during periods indicated. Europe'sEurope’s Other vertical grew 65.0% or $8.0 million in 2014, mainly due to addition of new clients through our 2014 acquisitions.

37


Revenues in the CIS geography showed a decrease of $9.8$9.8 million or 14.9% on a year-to-date bases compared to 2013. The decrease in revenues was primarily attributable to budgetary delays with certain customers located in Russia, as well as a decline in business from one of our largest customers in Kazakhstan. Additionally, significant foreign currency fluctuations in Russia and CIS countries had a material negative impact on the revenues from those locations.
Cost of Revenues (Exclusive of Depreciation and Amortization)
During the years ended December 31, 2014 and 2013, cost of revenues (exclusive of depreciation and amortization) was $456.5 million and $347.7 million, respectively, representing an increase of 31.3% for the year ended December 31, 2014 over the corresponding period of 2013, mainly due to increase in hiring of revenue generating professionals. As a percentage of revenues, cost of revenues (exclusive of depreciation and amortization), decreased 0.1% over the corresponding period of 2013, to 62.5% of consolidated revenues.
The increase in cost of revenues (exclusive of depreciation and amortization) in 2014 was primarily driven by a $107.9 million increase in personnel-related costs, the main component of cost of revenue, as well as an increase in stock-based compensation expense for our revenue generating IT professionals of $3.8 million. The increases in all of these costs were the result of organic increase in headcount as well as personnel additions from acquisitions.
Selling, General and Administrative Expenses
We continued to invest in key areas, including sales, infrastructure, industry expertise, and other functions supporting global operations.
During the year ended December 31, 2014, selling, general and administrative expenses totaled $163.7 million, representing an increase of 40.5% from $116.5$116.5 million during 2013. As a percentage of revenue, selling, general and administrative expenses represent 22.4% of consolidated revenues, an increase of 1.4% over last year. The increase in selling, general and administrative expenses in 2014 was primarily driven by a $30.2 million increase in total personnel-related costs, which include stock based compensation relating to the non-production personnel impact of the four 2014 acquisitions. During the year ended December 31, 2014, we incurred $13.4 million of selling, general and administrative costs related to our 2014 acquisitions, including $4.1 million of stock-based compensation expense, which resulted in a 1.8% increase in selling, general and administrative expenses expressed as a percentage of revenues.
Depreciation and Amortization Expense
Depreciation and amortization expense was $17.5$17.5 million in 2014, representing an increase of $2.4 million over 2013. Expressed as a percentage of revenues, depreciation and amortization expense totaled 2.4% and remained at the same level compared with 2013.
Goodwill Impairment Loss
We performed an annual goodwill impairment test as of October 31, 2014 in accordance with prescribed guidance. In assessing impairment both qualitatively and quantitatively based on the total of the expected future discounted cash flows directly related to the reporting unit, the Company determined that the fair value of the Russia reporting unit was below the carrying value of the reporting unit. The Company completed the second step of the goodwill impairment test, resulting in an

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impairment charge of $2.2 million as of December 31, 2014. All assets that related to the Russia segment, excluding goodwill and including any unrecognized intangible assets, were assessed by management and deemed to not be impaired.
Other Operating Expenses, Net
During the year ended December 31, 2014, we recorded a $2.6 million write-down in prepaid assets and a 1.1$1.1 million write-down of capitalized costs related to the construction of our corporate facilities in Belarus. Please see Note 16 in the notes to our consolidated financial statements in thisthe 2014 Annual Report on Form 10-K for further information.
Interest and Other Income, Net
Net interest and other income was $4.8 million in 2014, representing an increase of 55.0% from $3.1 million received in 2013. The increase was primarily driven by interest received on cash accounts in Belarus and, to a lesser extent, interest earned on employee housing loans.

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Provision for Income Taxes
The Company'sCompany’s effective tax rate was 19.9% and 19.2% in 2014 and 2013, respectively. The primary factors that caused this increase in the rate for the above-mentioned periods are: (a) the four acquisitions completed during 2014, which added other tax jurisdictions into the Company’s worldwide effective tax rate analysis; (b) a larger portion of the Company’s pre-tax profits attributable to tax jurisdictions with relatively higher effective tax rates (as compared to effective tax rates within the CIS region) were seen in 2014 and (c) a relative shift in offshore services that were performed in Belarus to other countries in the CIS region (specifically Ukraine and, to a lesser extent, Russia). Both of those locations have higher income tax rates than Belarus, where the Company is currently entitled to a 100% exemption from Belarusian income tax.
2013 Compared to 2012
Revenues
Revenues were $555.1 million and $433.8 million in 2013 and 2012, respectively, representing an increase of 28.0%. The increase was attributable to a combination of factors, including higher sales to existing and acquisition of new customers, which contributed $98.4 million and $21.7 million, respectively, to consolidated revenue growth. In addition, total revenues in 2013 and 2012 included $7.6 million and $6.4 million of reimbursable expenses and other revenues, respectively, which increased by 18.8% in 2013 as compared to 2012, but remained relatively flat as a percentage of revenues.
During the year ended December 31, 2013, North America, our largest geography, grew $74.8 million, or 36.2%, as compared with the year ended December 31, 2012. As a percentage of revenues, our North American geography accounted for 50.8% in 2013, which represented an increase of 3.1% over 2012. The growth in North America was driven by many realized opportunities in virtually every vertical. In particular, our ISVs and Technology vertical grew 30.0% as compared to 2012, primarily driven by an expansion of existing client relationships, which accounted for $25.9 million, or 91.6%, of the growth of this vertical over 2012. Solid performance of our North American geography was also a reflection of additional revenue streams created by our 2012 acquisitions. This was especially noticeable in the Business Information and Media vertical, which grew 8.9% in 2013 as compared to 2012 despite a significant decrease in revenues from one of our largest customers, Thomson Reuters. Without the impact of declining revenues from this customer, the Business Information and Media vertical increased $11.6 million, or 43.6% in 2013 over the corresponding periods of 2012. Additionally, our Travel and Consumer vertical grew $18.7 million, or 55.1%, in 2013 as compared to 2012 and accounted for 25.0% of total growth in our North American geography in 2013. Most of this increase was attributable to revenues from one of our strategic customers acquired in 2012, which had been on our “top ten” customer list since the second quarter of 2013. During the year ended December 31, 2013, revenues from this customer accounted for 20.7% of total revenue growth in North America, respectively.
During the year ended December 31, 2013, the Banking and Financial Services vertical remained our dominant vertical in Europe and accounted for 78.9% of total revenue growth in this geography. In 2013, revenues from Banking and Financial Services vertical increased $35.5 million, or 49.8%, over 2012. It was also our largest and fastest growing vertical on a consolidated basis. Strong performance of this vertical can be attributed to an increased demand for our services and ongoing relationship with existing customers located in Europe. In particular, 29.5% of total revenue growth during 2013 over the 2012 results was attributable to increased business from certain of our largest Banking and Financial Services customers located in the United Kingdom and Switzerland. Additionally, over the course of the year ended December 31, 2013, our Business Information and Media vertical grew significantly into the European markets. During the year ended December 31, 2013, this vertical increased $7.3 million, or 86.5%, over 2012, and accounted for 16.2% of the total growth in the European geography.
Revenues in the CIS geography increased $0.3 million, or 0.5%, in 2013 as compared to 2012. A slower growth rate as compared with the performance of other geographies in 2013 was due to a combination of factors. Following the addition of a

41


number of new customers in the fourth quarter of 2012, revenues from our Travel and Consumer vertical increased $2.7 million, or 49.1%, in 2013 as compared with 2012. However, that growth in the Travel and Consumer vertical was more than offset by a lower growth rate in the Banking and Financial Services vertical, the largest vertical in this geography, which increased $2.6 million, or 8.1%, in 2013 over 2012. In addition, included in 2012 results were $4.0 million of revenues recognized upon completion of a fixed-priced project that did not recur in 2013.
Cost of Revenues (Exclusive of Depreciation and Amortization)
During the years ended December 31, 2013 and 2012, cost of revenues (exclusive of depreciation and amortization) was $347.7 million and $270.4 million, respectively, representing an increase of 28.6% in 2013 over the corresponding period of 2012.
The increase in cost of revenues (exclusive of depreciation and amortization) in 2013 as compared to 2012 was primarily driven by a net increase of 845 IT professionals, from 8,495 as of December 31, 2012, to 9,340 as of December 31, 2013, to support the growth in demand for our services. As a percentage of revenues, cost of revenues (exclusive of depreciation and amortization) increased by 0.3% in 2013, as compared to the corresponding period of 2012, primarily as a result of higher compensation and benefits of our IT professionals.
Selling, General and Administrative Expenses
During the year ended December 31, 2013, selling, general and administrative expenses were $116.5 million, representing an increase of 35.7% from $85.9 million in 2012. As a percentage of revenues, selling, general and administrative expenses increased to 21.0% in 2013, or 1.2%, compared to 2012. Most of this increase was attributable to higher compensation and benefits of our non-production staff in 2013 as compared to 2012 as we continued to invest into key areas, including sales, industry expertise, and other functions supporting global operations. In addition, selling, general and administrative expenses included $3.3 million of additional stock-based compensation expense related to our 2012 acquisitions, which caused our selling, general, and administrative expenses to increase by 0.5% as a percentage of revenues in 2013 over 2012.
Depreciation and Amortization Expense
Depreciation and amortization expense was $15.1 million in 2013, representing an increase of $4.2 million over 2012. The increase was driven by additional capital expenditures to support headcount growth. As a percentage of revenues, depreciation and amortization expense increased to 2.7% in 2013 from 2.5% in 2012 primarily as a result of $1.9 million of additional expenses related to amortization of purchased intangible assets acquired in 2012.
Other Operating (Income)/ Expenses, Net
Net other operating income was $0.6 million in 2013 as compared to $0.7 million of expenses recorded in the corresponding period of 2012. Net other operating expenses recorded in 2012 were primarily attributable to the issuance of 53,336 shares of common stock to Instant Information Inc., a 2010 asset acquisition, upon the completion of our initial public offering in the first quarter of 2012, which did not recur in 2013. Additionally, during 2013 we received $0.8 million in connection with prior-year write-offs of other assets.
Interest and Other Income, Net
Net interest and other income was $3.1 million in 2013, representing an increase of 58.5% from $1.9 million received in 2012. The increase was largely driven by an increase in interest income earned on cash accounts in Belarus and, to a lesser extent, interest earned on employee housing loans in 2013 which accounted for $0.3 million.
Provision for Income Taxes
Our worldwide effective tax rate was 19.2% and 17.3% in 2013 and 2012, respectively. The increase in the worldwide effective tax rate in 2013, as compared to the corresponding period of 2012, was primarily due to (a) a higher portion of pre-tax profits attributable to our North American tax jurisdiction as a result of an acquisition completed in the second half of 2012; and (b) a relative shift in offshore services performed in Belarus, where we currently entitled to a 100% exemption from Belarusian income tax, to Ukraine, and, to a lesser extent, Russia, both of which have higher income tax rates.
Results by Business Segment
Our operations consist of four reportable segments: North America, Europe, Russia and Other. The segments represent components of EPAM for which separate financial information is available that is used on a regular basis by our chief executive

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officer, who is also our chief operating decision maker (“CODM”), in determining how to allocate resources and evaluate performance. This determination is based on the unique business practices and market specifics of each region and that each region engages in business activities from which it earns revenues and incurs expenses. Our reportable segments are based on managerial responsibility for a particular client. Because managerial responsibility for a particular client relationship generally correlates with the client’s geographic location, there is a high degree of similarity between client locations and the geographic boundaries of our reportable segments. In some specific cases, however, managerial responsibility for a particular client is assigned to a management team in another region, usually based on the strength of the relationship between client executives and particular members of our senior management team. In a case like this, the client’s activity would be reported through the management team’s reportable segment. Our CODM evaluates the Company’s performance and allocates resources based on segment revenues and operating profit.
Segment operating profit is defined as income from operations before unallocated costs. Generally, operating expenses for each operating segment have similar characteristics and are subject to similar factors, pressures and challenges. Expenses included in segment operating profit consist principally of direct selling and delivery costs as well as an allocation of certain shared services expenses. We use globally integrated support organizations to realize economies of scale and efficient use of resources. As a result, a majority of our expenses is shared by all segments. These shared expenses include Delivery, Recruitment and Development, Sales and Marketing, and support functions such as IT, Finance, Legal, and Human Resources. Generally, shared expenses are allocated based on measurable drivers of expense, e.g., recorded hours or headcount. However, certain expenses are not specifically allocated to specific segments, as management does not believe it is practical to allocate such costs to individual segments because they are not directly attributable to any specific segment. Further, stock based compensation expense is not allocated to individual segments in internal management reports used by the chief operating decision maker. Accordingly, these expenses are separately disclosed as “unallocated” and adjusted only against our total income from operations.
Revenues from external clients and segment operating profit, before unallocated expenses, for the North America, Europe, Russia and Other reportable segments for the fiscal years ended December 31, 2015, 2014 2013 and 20122013 were as follows:
Year Ended December 31,Year Ended December 31,
2014 2013 20122015 2014 2013
(in thousands) (in thousands) 
Total segment revenues:          
North America$374,509
 $284,636
 $197,271
$471,603
 $374,509
 $284,636
Europe299,279
 204,150
 168,913
400,460
 299,279
 204,150
Russia50,663
 55,764
 50,552
37,992
 50,663
 55,764
Other5,552
 10,493
 16,986
4,911
 5,552
 10,493
Total segment revenues$730,003
 $555,043
 $433,722
$914,966
 $730,003
 $555,043
Segment operating profit: 
  
   
  
  
North America$90,616
 $66,814
 $38,671
$112,312
 $90,616
 $66,814
Europe50,189
 34,573
 32,750
68,717
 50,189
 34,573
Russia7,034
 7,077
 9,049
5,198
 7,034
 7,077
Other(3,220) 844
 6,985
(94) (3,220) 844
Total segment operating profit$144,619
 $109,308
 $87,455
$186,133
 $144,619
 $109,308

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2015 Compared to 2014
North America Segment
During the years ended December 31, 2015 and 2014 revenues from our North America segment were 51.5% and 51.3% of total revenues representing an increase of $97.1 million, or 25.9%, over the corresponding period in 2014. The North America segment’s operating profits increased by $21.7 million, or 23.9%, as compared to the same period of 2014, to $112.3 million net operating profit. North America remains our most profitable segment with operating profit composing 23.8% of revenues.
The increase in revenues during the year ended December 31, 2015, was primarily driven by continued expansion of existing top customer relationships, as well as our recent acquisitions. Operating results of the North America operating segment benefited from our 2014 acquisitions in the Life Sciences and Healthcare industry as well as acquisitions of NavigationArts and AGS during 2015.
Europe Segment
During the years ended December 31, 2015 and 2014, revenues from our Europe segment were 43.8% and 41.0% of total segment revenues, respectively, representing an increase of $101.2 million, or 33.8%, in 2015 over the 2014 results. During 2015, the Europe segment’s operating profits increased by $18.5 million, or 36.9%, as compared to the corresponding period of 2014, to $68.7 million net profit from the segment’s operations.
Europe continues to be a growing segment in our portfolio as our business model continues to gain considerable traction with European-based clients primarily in the Financial Services and Travel and Consumer verticals. Furthermore, our Europe segment benefited from the continued growth of Jointech, a company we acquired in 2014, with locations in South-East Asia. This extended reach into a new geography created additional options for our existing customers within the Financial Services vertical, particularly in the areas of investment banking and wealth and asset management. We expect that our new and existing customers will use our services in that fast-growing region resulting in possible revenue and operating profit increases to the Europe segment.
Russia and Other Segments
During the years ended December 31, 2015, revenues from the Russia and the Other operating segments decreased by $12.7 million and $0.6 million, respectively, over corresponding period of 2014. Operating profits of the Russia segment decreased $1.8 million and the operating losses of the Other segment decreased $3.1 million when compared with the operating profits/ (losses) of these segments in the corresponding period of 2014.
Revenues and operating profits in the Russia and Other segments are subject to volatility resulting from revenue recognition delays related to finalizing budgets for certain arrangements with major customers in those segments causing instability between revenues and associated profits. Additionally, strong foreign currency fluctuations in 2014 further destabilized the economic situation in the regions that are included in these segments and negatively impacted our business in Russia and CIS countries during 2015. Since 2014, the United States and the European Union have imposed sanctions targeting Russian government and government-controlled interests and certain government officials. While this has not directly impacted our business in Russia, the sanctions aggravated the overall Russian economy and negatively influenced the business of our major clients in the region, decreasing demand for our services.
2014 Compared to 2013
North America Segment
During the years ended December 31, 2014 and 2013, revenues from our North America segment were 51.3% and 51.3% of total revenues representing an increase of $89.9 million, or 31.6%, over the corresponding period in 2013. The North America segment'ssegment’s operating profits increased by $23.8 million, or 35.6%, as compared to the same period of 2013, to $90.6 million net operating profit.
The increase in revenues during the year ended December 31, 2014, was primarily driven by continued expansion of existing customer relationships, as well, as our recent acquisitions. The largest growth was in the Other vertical due to acquiring new clients in the healthcare, insurance and life sciences industries through a 2014 acquisition as well as creating synergies with existing customers in those markets. During the year ended December 31, 2014, combined revenue growth from customers in the Other vertical accounted for $34.8 million, representing a 97.4% growth over prior year.

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All other verticals in the North America segment experienced revenue growth and increases in operating profit in 2014 as compared to 2013, mainly due to increased business from our long termlong-term clients with some contribution from the clients acquired in connection with acquisitions. The largest vertical, the ISVs and Technology, grew revenues by $22.1 million, or 18.6%, in 2014 as compared to the corresponding period of 2013. Revenues from our Travel and Consumer vertical in 2014 increased by $14.6 million, or 26.7%, as compared to the corresponding period in 2013. Banking and Financial Services had an increase in revenue of $5.9 million or 45.4%, and operating profit increased by 104.9% in this vertical in 2014 compared with the year ended December 31, 2013. Business Information and Media grew in revenue $12.5 million or 20% for the year ended December 31, 2014 as compared to the same period in 2013.
Europe Segment
During the years ended December 31, 2014 and 2013, revenues from our Europe segment were 41.0% and 36.8% of total segment revenues, respectively, representing an increase of $95.1 million, or 46.6%, in 2014 over the 2013 results. During 2014, the Europe segment’s operating profits increased by $15.6 million, or 45.2%, as compared to the corresponding period of 2013, to $50.2 million net profit from the segment’s operations.
Europe continues to be a rapidly growing segment in our portfolio, given our nearshore delivery capabilities, and our value proposition in delivering quality software engineering solutions and services. Our business model continues to gain considerable traction with European-based clients primarily in the Banking and Financial Services and Travel and Consumer verticals. Furthermore, our Europe segment benefited from the acquisition of Jointech, a company with locations in South-East Asia, which created a new value proposition for our existing customers within the Banking and Financial Services vertical, particularly in the areas of investment banking, wealth and asset management, and extended our reach into new geography. We expect that many of our new and existing customers in other business verticals will use our services in that fast-growing region resulting in possible revenue and operating profit increases to the Europe segment.
Russia and Other Segments
During the years ended December 31, 2014, revenues from the Russia and Other operating segments decreased by $5.1 million and $4.9 million, respectively, over corresponding period of 2013. Operating profits of the Russia segment showed no changes when compared with the operating profits of this segment in 2013, while profits of Other segments decreased $4.1 million compared to 2013.
Revenues and operating profits in the Russia and Other segments are subject to volatility resulting from revenue recognition delays related to finalizing budgets for certain arrangements with major customers in those segments. As a result, we recorded the cost related to the performance of services in 2014 with no associated revenues recognized in the period that services were rendered. These business arrangements were further exacerbated by strong foreign currency fluctuations in the fourth quarter of 2014, negatively impacting our business in Russia and CIS countries.
2013 Compared to 2012
North America Segment
During the years ended December 31, 2013 and 2012, revenues from the North America segment were 51.3% and 45.5% of total segment revenues, respectively, representing an increase of $87.4 million, or 44.3%, in 2013 over the 2012 results. The North America segment's operating profits increased by $28.1 million, or 72.8%, as compared to the corresponding period of 2012, to $66.8 million net profit from the segment’s operations.
The increase in revenues during year ended December 31, 2013, was primarily driven by continued expansion of existing client relationships, as well as by revenues contributed by new clients, including through the acquisitions of Thoughtcorp and Empathy Lab completed in 2012. Within the segment, revenue from our ISVs and Technology vertical increased $29.0 million, or 32.3%, in 2013 as compared to the corresponding period of 2012, representing 33.2% of the overall segment growth. Our Travel and Consumer vertical was the fastest growing vertical in 2013 with revenues increasing by $26.5 million, or 94.6%, in 2013 as compared to the corresponding period in 2012. The increase in the segment’s operating profit in 2013 as compared to 2012 was primarily driven by increased revenues and improved profitability, partially offset by an increase in compensation and benefits of our IT professionals primarily as a result of added headcount to support our revenue growth and continued demand for onsite resources.
Europe Segment
During the years ended December 31, 2013 and 2012, revenues from our Europe segment were 36.8% and 38.9% of total segment revenues, respectively, representing an increase of $35.2 million, or 20.9%, in 2013 over the 2012 results. During

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2013, the Europe segment’s operating profits increased by $1.8 million, or 5.6%, as compared to the corresponding period of 2012, to $34.6 million net profit from the segment’s operations.
Europe continues to be a rapidly growing segment in our portfolio, given our nearshore delivery capabilities, and our value proposition in delivering quality software engineering solutions and services is continuing to gain considerable traction with European-based clients. Within the segment, growth was the strongest in our Banking and Financial Services vertical, with 2013 revenues increasing by approximately $36.9 million, or 52.0%, over the corresponding period of 2012. The decrease in the segment’s operating profit as a percentage of the European segment’s revenues in 2013 as compared to 2012, was primarily due to an increase in compensation expense relative to recognized service revenues in 2013 as compared to 2012.
Russia Segment
During the years ended December 31, 2013 and 2012, revenues from our Russia segment were 10.0% and 11.7% of total segment revenues, respectively. In 2013, revenues from the Russia segment were $55.8 million, representing an increase of $5.2 million, or 10.3%, over the 2012 results. During 2013, our Russia segment's operating profits decreased by $2.0 million, or 21.8%, as compared to the corresponding period of 2012, to $7.1 million net profit from the segment’s operations.
Within the segment, 2013 revenues from the Banking and Financial Services and Travel and Consumer verticals increased $2.4 million and $2.8 million, respectively, accounting for most of the segment's growth in the period indicated. The decrease in operating profits of the Russia segment in 2013 when compared to 2012 was primarily attributable to revenue recognition delays related to fixed-price projects. Revenue recognition on such projects is susceptible to timing delays. As a result, there may be instances where we record the cost related to the performance of services with no associated revenue recognized in the period that services were rendered. In particular, we estimate a total of $2.5 million of revenues remained unrecognized as of December 31, 2013 in the Russia segment, with related costs reflected in the segment's operating results for the year then ended. Similarly, we may record revenue in a period where the underlying expenses have been recorded in a previous period, which would significantly improve the operating margin of the Russia segment in the period of recognition. Consequently, a higher concentration of fixed-price projects in the Russia segment affects the period-over-period comparability of the segment’s operating results.
Other Segment
During the year ended December 31, 2013, revenues from the Other segment were $10.5 million, or 1.9% of total segment revenues, representing a decrease of $6.5 million, or 38.2%, from the 2012 results. During 2013, our Other segment's operating profits decreased by $6.1 million, as compared to the corresponding period of 2012, to $0.8 million.
The decrease in revenues and operating profits of the Other segment in 2013, as compared to 2012, was primarily attributable to a completion of a large fixed-priced project in 2012 with $4.6 million revenues and $2.5 million operating profit recognized in 2012 that did not recur in 2013. In addition, the fourth quarter of 2012 benefited significantly from fixed-priced project with one of our largest customers in that segment that did not recur in 2013.
Liquidity and Capital Resources
Capital Resources
At December 31, 2014,2015, our principal sources of liquidity were cash and cash equivalents totaling $220.5$199.4 million, a one-year time deposit maturing in March 2016 in the amount of $30.0 million and $100.0$65.0 million of available borrowings under our revolving line of credit. As of that date, $176.3$181.9 million of our total cash and cash equivalents was held outside the United States. Of this amount, $33.8$79.3 million was held in U.S. dollar denominated accounts in Belarus, including deposits that accrued interest at an average interest rate of 4.1%4.8% during 2014. Also, at2015.
In 2014 we repatriated $75.8 million U.S. dollars from Belarus into our Cyprus entity’s bank in the United Kingdom. In March 2015, $30.0 million of this amount has been placed into a one-year interest bearing time deposit within the same bank. As of December 31, 2014, $75.82015, the remaining unrestricted balance of $28.7 million in USU.S. dollars was heldis kept in a savings account in our Cyprus entity’s bank in UK by our Cyprus entity, which was repatriated from Belarus earlier in the year, and $14.4 million in Russia. United Kingdom.
Our subsidiaries in the CIS or APAC regions do not maintain significant balances denominated in currencies other than U.S. dollars.
The cash and cash equivalents held at locations outside of the United States are for future operating expenses and we have no intention of repatriating those funds. However, if necessary, there are no restrictions on repatriating thoseas a result of various factors such as any global or regional instability or changes in tax laws in place for a specific time period, we may later decide to repatriate some or all of our funds back to the United States. If we decide to remit funds to the United States in the form of dividends, $176.3$212.1 million would be subject to foreign withholding taxes, of which $168.6$184.0 million would also be subject to U.S. corporate income tax. We believe that our available cash and cash equivalents held in the United States and cash flow to be generated from domestic operations will be adequate to satisfy our domestic liquidity needs in the foreseeable future. Our ability to expand and grow our business in accordance with current plans and to meet our long-term capital requirements will depend on many factors, including the rate, if any, at which our cash flows increase, our continued intent not to repatriate earnings from outside of the U.S. and the

45


availability of public and private debt and equity financing. To the extent we pursue one or more significant strategic acquisitions, we may incur debt or sell additional equity to finance those acquisitions.
On September 12, 2014, we entered into a new agreement establishingestablished a revolving credit facility with PNC Bank, National Association; Santander Bank, N.A; and Silicon Valley Bank (collectively the “Lenders”).Bank. This credit facility (the "2014 Credit Facility") consists of a $100.0 million revolving line of credit, with a maturity date of September 12, 2019. There is potential to increase the credit facility up to $200.0 million if certain conditions are met. Borrowings under the 2014 Credit Facility may be denominated in United States dollars or, up to a maximum of $50.0 million in British pounds sterling, Canadian dollars, euros or Swiss francs (or other currencies as may be approved by the lenders). Borrowings under the Revolving Facility bear interest at either a base rate or Euro-rate plus a margin based on the Company’s leverage ratio. Base rate is equal to the highest of (a) the Federal Funds Open Rate, plus 0.5%, (b) the Prime Rate, and (c) the Daily LIBOR Rate, plus 1.0%. The 2014 Credit Facility is secured by: (a) all tangible and intangible assets of the Company, and its U.S.-based subsidiaries including all accounts, general intangibles, intellectual property rights and equipment; and (b) all of the outstanding shares of capital stock and other equity interests in U.S.-based subsidiaries of the Company, and 65% of the outstanding shares of capital stock and other equity interests in certain of the Company’s foreign subsidiaries.
The line of credit also contains customary financial and reporting covenants and limitations. We are currently in compliance with all covenants contained in our revolving line of credit and believe that our revolving line of credit provides sufficient flexibility such that we will remain in compliance with its terms in the foreseeable future. At December 31, 2014,2015, we had no borrowings outstanding underdebt of $35.0 million with the linebalance of credit.the credit limit of $65.0 million remaining available for use.
Cash Flows
The following table summarizes our cash flows for the periods indicated:
Year Ended
December 31,
Year Ended
December 31,
2014 2013 20122015 2014 2013
(in thousands)(in thousands)
Consolidated Statements of Cash Flow Data:          
Net cash provided by operating activities$104,874
 $58,225
 $48,499
$76,393
 $104,874
 $58,225
Net cash used in investing activities(52,929) (21,820) (59,627)(125,494) (52,929) (21,820)
Net cash provided by financing activities10,347
 15,501
 38,847
33,764
 10,347
 15,501
Effect of exchange rate changes on cash and cash equivalents(10,965) (811) 1,597
(5,748) (10,965) (811)
Net increase in cash and cash equivalents$51,327
 $51,095
 $29,316
Net increase/(decrease) in cash and cash equivalents$(21,085) $51,327
 $51,095
Cash and cash equivalents, beginning of period169,207
 118,112
 88,796
220,534
 169,207
 118,112
Cash and cash equivalents, end of period$220,534
 $169,207
 $118,112
$199,449
 $220,534
 $169,207

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Operating Activities
Net cash provided by operations during the year ended December 31, 2015 decreased $28.5 million to $76.4 million, as compared to $104.9 million net cash provided by operations in 2014. During 2015, operating cash flows were impacted by increases in billed and unbilled accounts receivable and greater accrued expenses, which were mostly impacted by increases in bonus compensation. During 2015 we have recorded more accounts receivable and unbilled revenue as compared to the same period in 2014. The increases in billed and unbilled receivables are consistent with our growth in revenue and the majority of unbilled receivables are current with nearly 60% recorded in December 2015 and over 90% recorded during the fourth quarter of 2015.
Net cash provided by operations during the year ended December 31, 2014 increased $46.6 million to $104.9 million, as compared to $58.2 million net cash provided by operations in 2013. During 2014, operating cash flows benefited, in part, from our strong focus on improving working capital efficiencies during the latter part of 2013, including focus on reducing days outstanding for our billed and unbilled receivables. This emphasis more than offset the higher working capital requirements associated with increased revenues, including growth in total compensation and benefits of our IT professionals, overhead expenses, and higher tax payments.
Investing Activities
Net cash providedused in investing activities during the year ended December 31, 2015 was $125.5 million and consisted primarily of a $30.0 million interest bearing time deposit set up by operations increased by $9.7 million to $58.2 millionour Cyprus entity in 2013 from $48.5the United Kingdom in March 2015 and $76.9 million net cash provided by operationsused in 2012. For 2013, netthe business combinations with NavigationArts and AGS. The cash provided by operations was primarily comprisedspent on acquisitions of net income of $22.3businesses in 2015 increased $39.8 million before accounting for non-cash items such as stock-based compensation, depreciation and amortization, bad debt expense, and other items aggregating to $14.8 million. Net increase in operating assets and liabilities in 2013 as compared to 2012 was primarily related to a reduction in prepaid and other assets by approximately $1.9 million as a result of non-recurring purchases made in 2012 coupled with a net increase in accrued expenses and trade payables of $2.0 million mainly due to a decrease in third party contractor expenses. This increase in operating cash flows was partially offset by higher billed and unbilled receivables of $7.6 million, which was mainly driven by increased volumes and higher ratio of fixed-priced projects in 2013 as compared to 2012, and a $6.1 million decrease in other net liabilities. The decrease in other net liabilities includes the effects of a higher portion of December salaries and related taxes released before the year-end in 2013 when compared to 2012 and a reduction in warranty revenues of $1.6 million related to several large non-recurring projects completed in prior periods.

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Investing Activities2014.
Net cash used in investing activities during the year ended December 31, 2014 increased $31.1 million to $52.9 million as compared to $21.8 million used in investing activities during the corresponding period of 2013. The increase was primarily attributable to $37.1 million spent on acquisitions of businesses, partially offset by a net $6.2 million decrease in loans issued under the Employee Housing Program compared to the corresponding period last year.
Financing Activities
Net cash used in investingprovided by financing activities during the year ended December 31, 2013 decreased by $37.82015 was $33.8 million, a decrease of $23.4 million from the same period in 2014 primarily due to $21.8payment of deferred consideration in the amount of $30 million as compared to $59.6 million of net cash used in investing activities in 2012. Thewell as a decrease in cash spentexcess tax benefit on investing activities in 2013 as compared to 2012, was primarily attributable to an $11.1 million decrease in payments made in connection with the construction of corporate facilities in Belarus combined with a $32.9 million decrease in payments made in connection with our 2012 acquisitions. The decrease wasstock-based compensation plans, partly offset by net payments of $5.8 million made by us in relation to employee loans issued under the Employee Housing Program.
Financing Activitieshigher proceeds from stock option exercises.
Net cash provided by financing activities during the year ended December 31, 2014 was $10.3 million, a decrease of $5.2 million from the same period in 2013 primarily due to payment of deferred consideration in the amount of $4 million as well as a decrease in excess tax benefit on stock-based compensation plans, partly offset by higher proceeds from stock option exercises.
Net cash provided by financing activities in 2013 decreased by $23.3 million to $15.5 million, as compared to $38.8 million provided by financing activities in 2012. This was primarily due to a net $30.6 million received in connection with our initial public offering of common stock in the first quarter of 2012 that did not recur in 2013, partially offset by an increase of $7.3 million in proceeds received by us in 2013 as a result of stock option exercises and associated tax benefits.
Contractual Obligations and Future Capital Requirements
Contractual Obligations
Set forth below is information concerning our fixed and determinable contractual obligations as of December 31, 2014.2015.
 Total 
Less than 1
Year
 1-3 Years 3-5 Years 
More than 5
Years
 (in thousands)
Operating lease obligations$44,402
 $16,718
 $18,150
 $8,582
 $952
Other short-term obligations (1)
8,200
 8,200
 
 
 
Employee Housing Program (2)
11
 11
 
 
 
 $52,613
 $24,929
 $18,150
 $8,582
 $952
 Total 
Less than 1
Year
 1-3 Years 3-5 Years 
More than 5
Years
 (in thousands)
Operating lease obligations$49,616
 $17,606
 $23,400
 $5,946
 $2,664
Long-term debt obligation$65,000
 $
 $
 $65,000
 $
 $114,616
 $17,606
 $23,400
 $70,946
 $2,664
During the year ended December 31, 2015, the Company completed construction of the office building within the High Technologies Park in Minsk, Belarus, and, therefore, no future capital requirements exist related to this construction. See Note 15in the notes to our consolidated financial statements in this Annual Report on Form 10-K for further information.
(1)As of December 31, 2014, we estimated up to $8.2 million of additional investment could be required to complete construction of a 14,071 square meter office building within the High Technologies Park in Minsk, Belarus. Please see Note 16 in the notes to our consolidated financial statements in this Annual Report on Form 10-K for further information.
(2)In the third quarter of 2012, our Board of Directors approved the Employee Housing Program, which assists employees in purchasing housing in Belarus. As part of the program, we will extend financing to employees up to an aggregate amount of $10.0 million.
Future Capital Requirements

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We believe that our existing cash and cash equivalents combined with our expected cash flow from operations will be sufficient to meet our projected operating and capital expenditure requirements for at least the next twelve months and that we possess the financial flexibility to execute our strategic objectives, including the ability to make acquisitions and strategic investments in the foreseeable future. Our ability to generate cash, however, is subject to our performance, general economic conditions, industry trends and other factors. To the extent that existing cash and cash equivalents and operating cash flow are insufficient to fund our future activities and requirements, we may need to raise additional funds through public or private equity or debt financing. If we issue equity securities in order to raise additional funds, substantial dilution to existing stockholders may occur. If we raise cash through the issuance of additional indebtedness, we may be subject to additional contractual restrictions on our business. There is no assurance that we would be able to raise additional funds on favorable terms or at all.



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Off-Balance Sheet Commitments and Arrangements
We do not have any obligations under guarantee contracts or other contractual arrangements other than as disclosed in Note 16 i15n in the notes to our consolidated financial statements in this Annual Report on Form 10-K. We have not entered into any transactions with unconsolidated entities wherebywhere we have financial guarantees, subordinated retained interests, derivative instruments, or other contingent arrangements that expose us to material continuing risks, contingent liabilities, or any other obligation under a variable interest in an unconsolidated entity that provides financing, liquidity, market risk, or credit risk support to us, or engages in leasing, hedging, or research and development services with us.

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Critical Accounting Policies
We prepare our audited consolidated financial statements in accordance with U.S. generally accepted accounting principles (GAAP), which require us to make judgments, estimates and assumptions that affect: (i) the reported amounts of assets and liabilities, (ii) disclosure of contingent assets and liabilities at the end of each reporting period and (iii) the reported amounts of revenues and expenses during each reporting period. We evaluate these estimates and assumptions based on historical experience, knowledge and assessment of current business and other conditions, and expectations regarding the future based on available information and reasonable assumptions, which together form a basis for making judgments about matters not readily apparent from other sources. Since the use of estimates is an integral component of the financial reporting process, actual results could differ from those estimates. Some of our accounting policies require higher degrees of judgment than others in their application. When reviewing our audited consolidated financial statements, you should consider (i) our selection of critical accounting policies, (ii) the judgment and other uncertainties affecting the application of such policies and (iii) the sensitivity of reported results to changes in conditions and assumptions. We consider the policies discussed below to be critical to an understanding of our audited consolidated financial statements as their application places significant demands on the judgment of our management.
An accounting policy is considered to be critical if it requires an accounting estimate to be made based on assumptions about matters that are highly uncertain at the time the estimate is made, and if different estimates that reasonably could have been used, or changes in the accounting estimates that are reasonably likely to occur periodically, could materially impact the audited consolidated financial statements. We believe that the following critical accounting policies are the most sensitive and require more significant estimates and assumptions used in the preparation of our audited consolidated financial statements. You should read the following descriptions of critical accounting policies, judgments and estimates in conjunction with our audited consolidated financial statements and other disclosures included in this annual report.
Revenue Recognition — We recognize revenue when realized or realizable and earned, which is when the following criteria are met: persuasive evidence of an arrangement exists; delivery has occurred; the sales price is fixed or determinable; and collectability is reasonably assured. Determining whether and when some of these criteria have been satisfied often involves assumptions and judgments that can have a significant impact on the timing and amount of revenue we report. If there is an uncertainty about the project completion or receipt of payment for the consulting services, revenues are deferred until the uncertainty is sufficiently resolved. At the time revenues are recognized, we provide for any contractual deductions and reduce revenues accordingly. We defer amounts billed to our clients for revenues not yet earned. Such amounts are anticipated to be recorded as revenues as services are performed in subsequent periods. Unbilled revenues represent services provided which are billed subsequent to the period end in accordance with the contract terms.
We derive our revenues from a variety of service offerings, which represent specific competencies of our IT professionals. Contracts for these services have different terms and conditions based on the scope, deliverables, and complexity of the engagement, which require management to make judgments and estimates in determining appropriate revenue recognition pattern. Fees for these contracts may be in the form of time-and-materials or fixed-price arrangements.
The majority of our revenues (84.7%(85.8% of revenues in 2015, 84.7% in 2014 and 82.3% in 2013 and 84.1% in 2012)2013) are generated under time-and-material contracts whereby revenues are recognized as services are performed with the corresponding cost of providing those services reflected as cost of revenues when incurred. The majority of such revenues are billed on an hourly, daily or monthly basis whereby actual time is charged directly to the client.
Revenues from fixed-price contracts (13.6%(12.8% of revenues in 2015, 13.6% in 2014 and 15.7% in 2013 and 13.7% in 2012)2013) are determined using the proportional performance method. In instances where final acceptance of the product, system, or solution is specified by the client, revenue is deferred until all acceptance criteria have been met. In absence of a sufficient basis to measure progress towards completion, revenue is recognized upon receipt of final acceptance from the client. In order to estimate the amount of revenue for the period under the proportional performance method, we determine the percentage of actual labor hours incurred as compared to estimated total labor hours and apply that percentage to the consideration allocated to the deliverable. The complexity of the estimation process and factors relating to the assumptions, risks and uncertainties inherent with the application of the proportional performance method of accounting affects the amounts of revenues and related

48


expenses reported in our consolidated financial statements. A number of internal and external factors can affect such estimates, including labor hours and specification and testing requirement changes. The cumulative impact of any revision in estimates is reflected in the financial reporting period in which the change in estimate becomes known. No significant revisions occurred in each of the three years ended December 31, 2015, 2014 2013 and 2012.2013. Our fixed price contracts are generally recognized over a period of 12 months or less.
We report gross reimbursable “out-of-pocket” expenses incurred as both revenues and cost of revenues in the consolidated statements of income and comprehensive income as these expenses are billable to our clients.
Fair Value of Financial Instruments — We make significant assumptions about fair values of its financial instruments. Fair value is determined based on the assumptions that market participants would use in pricing the asset or liability. We utilize the following fair value hierarchy in determining fair values:
Level 1 - Quoted prices for identical assets or liabilities in active markets.
Level 2 - Inputs other than quoted prices within Level 1 that are observable either directly or indirectly, including quoted prices in markets that are not active, quoted prices in active markets for similar assets or liabilities, and observable inputs other than quoted prices such as interest rates or yield curves.
Level 3 - Unobservable inputs reflecting our view about the assumptions that market participants would use in pricing the asset or liability.
Where the fair values of financial assets and liabilities recorded in the consolidated balance sheet cannot be derived from an active market, they are determined using a variety of valuation techniques. These valuation techniques include a net present value technique, comparison to similar instruments with market observable inputs, options pricing models and other relevant valuation models. Inputs into these models are taken from observable market data whenever possible, but in instances where it is not feasible, a degree of judgment is required to establish fair values.
Financial Assets and Liabilities Measured At Fair Value on a Recurring Basis
At December 31, 2014, contingent liabilities measured at fair value on a recurring basis comprised contingent consideration payable in cash and stock, performance-based awards issued to certain former owners of acquired businesses in exchange for future services, and certain other contractual liabilities.
We estimate the fair value of contingent liabilities based on certain performance milestones of the acquired businesses, and estimated probabilities of achievement, then discount the liabilities to present value using our cost of debt for the cash component of contingent consideration, and risk free rate for the stock component of a contractual contingency. Contingent liabilities are valued using significant inputs that are not observable in the market which are defined as Level 3 inputs pursuant to fair value measurement accounting. We believe our estimates and assumptions are reasonable, however, there is significant judgment involved. Changes in the fair value of contingent consideration liabilities primarily result from changes in the timing and amount of specific milestone estimates and changes in probability assumptions with respect to the likelihood of achieving the various earnout criteria. These changes could cause a material impact to, and volatility in our operating results.
Financial Assets and Liabilities Measured At Fair Value on a Non-Recurring Basis
We issue loans to our employees under the Employee Housing Program (“housing loans”). Housing loans are issued in U.S. Dollars with a 5-year term and carry an interest rate of 7.5%. The program was designed to be a retention mechanism for our employees in Belarus.
Although permitted by authoritative guidance, we did not elect a fair value option for these financial instruments. These housing loans are measured at fair value upon initial recognition and subsequently carried at amortized cost less allowance for loan losses. Any difference between the carrying value and the fair value of a loan upon initial recognition (“day-one” recognition) is charged to expense.
The housing loans were classified as Level 3 measurements within the fair value hierarchy because they were valued using significant unobservable inputs. The estimated fair value of these housing loans upon initial recognition was computed by projecting the future contractual cash flows to be received from the loans and discounting those projected net cash flows to a present value, which is the estimated fair value (the “Income Approach”). In applying the Income Approach, we analyzed similar loans offered by third-party financial institutions in Belarusian rubles (“BYR”) and adjusted the interest rates charged on such loans to exclude the effects of underlying economic factors, such as inflation and currency devaluation. We also assessed the probability of future defaults and associated cash flows impact. In addition, we separately analyzed the rate of return that market participants in Belarus would require when investing in unsecured USD-denominated government bonds

4945


with similar maturities (a “risk-free rate”) and evaluated a risk premium component to compensate the market participants for the credit and liquidity risks inherent in the loans’ cash flows, as described in the following paragraph. As a result of the analysis performed, we determined the carrying values of the housing loans issued during the year ended December 31, 2014 approximated their fair values upon initial recognition. We also estimated the fair values of the housing loans that were outstanding as of December 31, 2014 using the inputs noted above and determined their fair values approximated the carrying values as of that date.
Repayment of housing loans is primarily dependent on personal income of borrowers obtained through employment with EPAM, which income is set in U.S. dollars and is not closely correlated with common macroeconomic risks existing in Belarus, such as inflation, local currency devaluation and decrease in the purchasing power of the borrowers’ income. Given a large demand for the program among our employees and its advantages as compared to alternative methods of financing available on the market, we expect the borrowers to fulfill their obligations, and we estimate the probability of voluntary termination of employment among the borrowers as de minimis. Additionally, housing loans are capped at $50 thousand per loan and secured by real estate financed through the program. We establish a maximum loan-to-value ratio of 70% and expect a decrease in the ratio over the life of a housing loan due to on-going payments by employees.
Business Combinations — We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired includingand the related goodwill and other intangible assets.assets in accordance with the FASB ASC Topic 805, “Business Combinations.” We identify and attribute fair values and estimated lives to the intangible assets acquired and allocate the total cost of an acquisition to the underlying net assets based on their respective estimated fair values. Determining the fair value of assets acquired and liabilities assumed requires management’s judgment and involves the use of significant estimates, including projections of future cash inflows and outflows, discount rates, asset lives and market multiples. There are different valuation models for each component, the selection of which requires considerable judgment. These determinations will affect the amount of amortization expense recognized in future periods. We base our fair value estimates on assumptions we believe are reasonable, but recognize that the assumptions are inherently uncertain.
If initial accounting for the business combination has not been completed by the end of the reporting period in which the business combination occurs, provisional amounts are reported for which the accounting is incomplete, with retrospective adjustment made to such provisional amounts during the measurement period to present new information about facts and circumstances that existed as of the acquisition date. Once the measurement period ends, and in no case beyond one year from the acquisition date, revisions of the accounting for the business combination are recorded in earnings.
All acquisition-related costs, other than the costs to issue debt or equity securities, are accounted for as expenseexpenses in the period in which they are incurred. Changes in fair value of contingent consideration arrangements that are not measurement period adjustments are recognized in earnings. Payments to settle contingent consideration, if any, are reflected in cash flows from financing activities and the changes in fair value are reflected in cash flows from operating activities in our consolidated statements of cash flows.
Our acquisitions usually do not have significant amounts of tangible assets, as the principalThe acquired assets typically acquired areconsist of customer relationships, trade names, non-competition agreements, and workforce. Asworkforce and as a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets.
Goodwill and Other Intangible Assets — Goodwill and intangible assets that have indefinite useful lives are treated consistently with FASB ASC 350. They are tested annually350, “Intangibles - Goodwill and Other.” We do not have any intangible assets with indefinite useful lives.
We assess goodwill for impairment annually, and are not amortized.more frequently in certain circumstances. Events or circumstances that might require impairment testing of goodwill and other intangible assets include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations.
Intangible assets that have finite useful lives are amortized over their estimated useful lives on We initially perform a straight-line basis. When facts and circumstances indicate potential impairmentqualitative assessment of amortizable intangible assets, we evaluate the recoverability of the asset’s carrying value, using estimates of undiscounted future cash flows that utilize a discount rate determined by managementgoodwill to be commensurate with the risk inherent in our business model over the remaining asset life. The estimates of future cash flows attributable to intangible assets require significant judgment based on our historical and anticipated results. Any impairment loss is measured by the excess of carrying value over fair value.
As of December 31, 2014 and 2013, all of our intangible assets had finite lives and we did not incur any impairment losses in respect of our intangible assets during the years ended December 31, 2014, 2013 or 2012.
Effective in the fourth quarter of 2013, we changed the annual goodwill impairment assessment date for all of our reporting units from December 31st to October 31st, which represented a voluntary change in the annual goodwill impairment testing date.  We are also required to assess the goodwill of our reporting unitstest for impairment between annualindicators. After applying the qualitative assessment, dates

50


when events or circumstances dictate. We evaluateif we conclude that it is not more likely than not that the recoverability of goodwill at a reporting unit level and we had three reporting units that had recorded goodwill, which were subject to the annual impairment testing in 2014. Our annual impairment review as of October 31, 2014 resulted in an impairment charge for the Russian reporting unit. There was no impairment charge for any of these reporting units as of October 31, 2013.
For our annual impairment test, we compare the respective fair value of our reporting units to their respectivegoodwill is less than the carrying values in order toamount; the two-step goodwill impairment test is not required.
If we determine ifthat it is more likely than not that the carrying amount exceeds the fair value, we perform a quantitative impairment test. If an indicator of impairment is indicated. If so,identified, the implied fair value of the reporting unit’s goodwill is compared to its carrying amount, and the impairment loss is measured by the excess of the carrying value over the fair value. The fair values are estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings multiples based on market data. These valuations are considered Level 3 measurements under FASB ASC Topic 820. We utilize estimates to determine the fair value of the reporting units such as future cash flows, growth rates, capital requirements, effective tax rates and projected margins, among other factors. Estimates utilized in the future evaluations of goodwill for impairment could differ from estimates used in the current period calculations. We are also required to assess the goodwill of its reporting units for impairment between annual assessment dates as events or circumstances dictate. Based on our assessment, these operating segments are not at risk for impairment.
Intangible assets that have finite useful lives are amortized over their estimated useful lives on a straight-line basis. When facts and circumstances indicate potential impairment of amortizable intangible assets, we evaluate the recoverability of the asset’s carrying value, using estimates of undiscounted future cash flows that utilize a discount rate determined by ourthe management to be commensurate with the risk inherent in our business model over the remaining asset life. The estimates of future cash flows attributable to intangible assets require significant judgment based on our historical and anticipated results. Any impairment loss is measured by the excess of carrying value over fair value. All of our intangible assets have finite lives.
Effective in the fourth quarter of 2013, we changed the annual goodwill impairment assessment date for all of our reporting units from December 31st to October 31st, which represented a voluntary change in the annual goodwill impairment testing date. 

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Income Taxes The provision for income taxes includes federal, state, local and foreign taxes. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the audited consolidated financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. Changes to enacted tax rates would result in either increases or decreases in the provision for income taxes in the period of changes. We evaluate the realizability of deferred tax assets and recognize a valuation allowance when it is more likely than not that all or a portion of deferred tax assets will not be realized.
The realization of deferred tax assets is primarily dependent on future earnings. Any reduction in estimated forecasted results may require that we record valuation allowances against deferred tax assets. Once a valuation allowance has been established, it will be maintained until there is sufficient positive evidence to conclude that it is more likely than not that the deferred tax assets will be realized. A pattern of sustained profitability will generally be considered as sufficient positive evidence to reverse a valuation allowance. If the allowance is reversed in a future period, the income tax provision will be correspondingly reduced. Accordingly, the increase and decrease of valuation allowances could have a significant negative or positive impact on future earnings.
Changes in tax laws and rates may affect recorded deferred tax assets and liabilities and our effective tax rate in the future. The American Taxpayer Relief Act of 2012 (the “Act”) was signed into law on January 2, 2013. Because a change in tax law is accounted for in the period of enactment, certain provisions of the Act benefiting our 2012 U.S. federal taxes, including the Subpart F controlled foreign corporation look-through exception were not recognized in our 2012 financial results and instead were reflected in our 2013 financial results.
Stock-Based Compensation — Equity-based compensation cost relating to the issuance of share-based awards to employees is based on the fair value of the award at the date of grant, which is expensed ratably over the requisite service period, net of estimated forfeitures. TheOver time, the forfeiture assumption is ultimately adjusted to the actual forfeiture rate. Therefore, changes in the forfeiture assumptionsrate and such change may affect the timing of the total amount of expense recognized over the vesting period. The service period is the period over which the employee performs the related services, which is normally the same as the vesting period. Equity-based awards that do not require future service are expensed immediately. Equity-based awards that do not meet the criteria for equity classification are recorded inas liabilities and adjusted to fair value at the end of each reporting period. Distributions associated with liability-classified awards not expected to vest are accounted for as compensation expense in the consolidated statements of income and comprehensive income.
Recent Accounting Pronouncements
See Note 13 i1n in the notes to our consolidated financial statements in this Annual Report on Form 10-K for information regarding the impact of certain recent accounting pronouncements on our audited consolidated financial statements.



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Item 7A. Quantitative and Qualitative Disclosures About Market Risk
We are exposed to certain market risks in the ordinary course of our business. These risks result primarily from changes in foreign currency exchange rates and interest rates, and concentration of credit risks. In addition, our international operations are subject to risks related to differing economic conditions, changes in political climate, differing tax structures, and other regulations and restrictions.
Concentration of Credit and Other Credit Risks
Financial instruments that potentially subject us to significant concentrations of credit risk consist primarily of employee loans receivable, cash and cash equivalents, trade accounts receivable and unbilled revenues.
At December 31, 2014,2015, outstanding loans issued to employees were $6.5$6.3 million, or 1.1%0.8%, of our total assets. These loans potentially expose us to a risk of non-payment and loss. Repayment of these loans is primarily dependent on the personal income of borrowers obtained through their employment with EPAM and may be adversely affected by macroeconomic changes, such as higher unemployment levels, currency devaluation and inflation. Given a large demand for the program among our employees and its advantages as compared to alternative methods of financing available on the market, we expect the borrowers to fulfill their obligations, and we estimate the probability of voluntary termination of employment among the borrowers as de minimis. Additionally, housing loans are capped at $50 thousand per loan and secured by real estate financed through the continuing financial stabilityprogram. We establish a maximum loan-to-value ratio of 70% and expect a decrease in the ratio over the life of a borrower may be adversely affectedhousing loan due to on-going payments by job loss, divorce, illness or personal bankruptcy. We also face the risk that the collateral will be insufficient to compensate us for loan losses, if any, and costs of foreclosure. Decreases in real estate values could adversely affect the value of property used as collateral, and we may be unsuccessful in recovering the remaining balance from either the borrower and/or guarantors.employees.
We maintain our cash and cash equivalents and short-term investments with financial institutions. We believe that our credit policies reflect normal industry terms and business risk. We do not anticipate non-performance by the counterparties. AsWe hold a significant balance of December 31, 2014, $59.3 million of total cash was held in banks in the CIS countries with $34.2 million of that in Belarus, and $14.4 million in Russia. Bankingwhere banking and other financial systems in the CIS region are less developed and regulated than in some more developed markets, and legislation relating to banks and bank accounts is subject to varying interpretations and inconsistent application. Banks in the CIS region generally do not meet the banking standards of more developed markets and bank deposits made by corporate entities in the CIS region are not insured. As of December 31, 2015, $103.7 million of total cash was held in CIS countries, with $79.5 million of that in Belarus, and $10.5 million in Russia. The CIS banking sector remains subject to periodic instability and the transparency of the banking sector lags behind international standards. Particularly in Belarus, a banking crisis, bankruptcy or insolvency of banks that process or hold our funds, may result in the loss of our deposits or adversely affect our ability to complete banking transactions in the CIS region, which could materially adversely affect our business and financial condition. Cash in other CIS locations is used for short-term operational needs and cash balances in those banks move with the needs of the entities.

47


Trade accounts receivable and unbilled revenues are generally dispersed across our clients in proportion to their revenues. As of December 31, 2014,2015, billed and unbilled trade receivables from one customer, UBS AG, individually exceeded 10% and accounted for 16.5%12.4% and 19.8% of our total billed and unbilled trade receivables, as of that date. There were norespectively.
During the year ended December 31, 2015, our top five customers individually exceeding 10%accounted for 32.6% of our billed trade receivables astotal revenues, and our top ten customers accounted for 43.8% of December 31, 2014.
our total revenues, respectively. During the year ended December 31, 2014, our top five customers accounted for 32.8% of our total revenues, and our top ten customers accounted for 43.9% of our total revenues, respectively.
During the yearyears ended December 31, 2013, our top five customers accounted for 30.6% of our total revenues,2015 and our top ten customers accounted for 42.3% of our total revenues, respectively.
During the year ended December 31, 2014, the Company had one customer, UBS AG, with associated revenues of $129.8 million and $97.6 million, respectively, which accounted for more than 10% of total revenues in the periods indicated. No customers generated revenues individually exceeding 10% of total revenues during the year ended December 31, 2013.
CreditHistorically, credit losses and write-offs of trade accounts receivable balances have historically not been material to our audited consolidated financial statements.
Interest Rate Risk
Our exposure to market risk is mainly influenced by the changes in interest rates received on our cash and cash equivalent deposits and paid on any outstanding balance on our revolving line of credit, which is subject to a variety of rates depending on the type and termtiming of funds borrowed.
As of December 31, 2014,2015, we have not borrowed under the line of credit and did not have any outstanding debt.debt of $35.0 million. The interest rate for this debt is based on LIBOR, which is set to change quarterly, according to the 2014 Credit Facility agreement. We do not use derivative financial instrumentsbelieve we are exposed to hedge our risk ofmaterial direct risks associated with changes in interest rate volatility.rates related to this borrowing.
We alsooffer loans under the Employee Housing Program and these loans are designed to be a retention mechanism for our employees in Belarus. These loans are financed with available funds of our Belarusian subsidiary and we do not believe that employee loans issued by us under the Employee Housing Program expose us to significant interest rate risks. These loans are designed to be a retention mechanism for our employees in Belarus and are financed with available funds of our Belarusian subsidiary.

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We have not been exposed to material risks due to changes in market interest rates.rates and we do not use derivative financial instruments to hedge our risk of interest rate volatility. However, our future interest expense may increase and interest income may fall due to changes in market interest rates.
Foreign Exchange Risk
Our consolidated financial statements are reported in U.S. dollars. dollars; however, our business is conducted in various currencies. Outside of the United States, we operate primarily through wholly-owned subsidiaries in Canada, Europe, Asia, and the CIS and CEE regions and generate a significant portion of our revenues in currencies other than the U.S. dollar, principally, euros, British pounds sterling, Canadian dollars, Swiss francs and Russian rubles. We incur expenditures in non-U.S. dollar currencies, principally in Hungarian forints, euros, Russian rubles, Polish zlotys, Mexican pesos, Hong Kong dollars and China yuan renminbi (“CNY”) associated with our delivery centers located in the CEE, Europe, Mexico and APAC regions.
Our international operations expose us to foreign currency exchange rate changes that could impact translations of foreign denominated assets and liabilities into U.S. dollars and future earnings and cash flows from transactions denominated in different currencies. Our exposure to currency exchange rate changes is diversified due to variety of countries and currencies in which we conduct business. Outside of the United States we operate primarily through wholly owned subsidiaries in Canada, Europe, Asia, and the CIS and CEE regions and generate a significant portion of our revenues in currencies other than the U.S. dollar, principally, euros, British pounds sterling, Canadian dollars, and Russian rubles. We incur expenditures in non-U.S. dollar currencies, principally in Hungarian forints, euros, Russian, rubles, Polish zlotys, Hong Kong dollars and China yuan renminbi (“CNY”) associated with our delivery centers located in the CEE, Europe and APAC regions. We are exposed to fluctuations in foreign currency exchange rates primarily on accounts receivable and unbilled revenues from sales in these foreign currencies and cash outflows for expenditures in foreign currencies. We do not use derivative financial instruments to hedge the risk of foreign exchange volatility. Our results of operations can be affected if any of the currencies, which we use materially in our business, appreciate or depreciate against the U.S. dollar. Our exchange rate risk primarily arises from our foreign currency revenues and expenses. Our exposure to currency exchange rate changes is naturally diversified due to the variety of countries and currencies in which we conduct business.
Based on our results of operations for the year ended December 31, 2015, if currencies were not impacted by foreign exchange fluctuations and results were evaluated on the constant currency basis using rates from the year 2014 a 1.0% appreciation/(depreciation) ofour consolidated revenue would have been higher by 5.7%. Revenue has been negatively impacted by all applicable foreign currencies againstwhen compared on the U.S. dollar would resultconstant currency basis to the year 2014 with main differences coming from the decline in an estimated increase/(decrease) of approximately $0.9 million inthe Russian ruble, euro, British pound sterling and Canadian dollar. If compared on the same constant currency basis, our net income respectively. Basedwould have been lower by 1.5% as the impact from the currency declines also had some favorable impact on the expenses at our results of operationsoffshore delivery centers. Net income for the year ended December 31,2015 compared on the constant currency basis to the year 2014 was impacted positively by the Russian ruble, Hungarian forint and included inPolish zloty and was offset mostly by the analysisnegative impact from the euro, British pounds sterling and Canadian dollar. Overall, the most significant impact on the 2015 results was from the euro, the Russian ruble and Canadian dollar fluctuations.

48


To the extent that we need to convert U.S. dollars into foreign currencies for our operations, appreciation of such foreign currencies against the U.S. dollar would adversely affect the amount of such foreign currencies we receive from the conversion. Sensitivity analysis is used as a primary tool in evaluating the effects of changes in foreign currency exchange rates, interest rates and commodity prices on our business operations. The analysis quantifies the impact of potential changes in these rates and prices on our earnings, cash flows and fair values of assets and liabilities during the forecast period, most commonly within a one-year period. The ranges of changes used for the purpose of this analysis reflect our view of changes that are reasonably possible during the forecast period. Fair values are the present value of projected future cash flows based on market rates and chosen prices. Changes in the currency exchange rates resulted in our reporting a net transactional foreign currency exchange losses of $2.2$4.6 million and $2.5$2.2 million during the years ended December 31, 2014,2015, and 2013,2014, respectively. The increase in net foreign exchange loss for the year ended December 31, 20142015 as compared to 20132014 was primarily attributable to changes in exchange rates of Russian ruble, euro, British pound sterling and Ukrainian hryvnyaCanadian dollar against U.S. dollar in the periods indicated, including realized losses from foreign currency conversions. These losses are included in theour consolidated statements of income and comprehensive income.
Additionally, foreign currency translation adjustments from translating financial statements of our foreign subsidiaries from functional currency to the U.S. dollars are recorded as a separate component of stockholders’ equity or included in the consolidated statements of income and comprehensive income if local currencies of our foreign subsidiaries differ from their functional currencies. As of December 31, 2014,2015, approximately 21.9%23.6% of our total net assets were subject to foreign currency translation exposure, as compared to 21.6%21.9% as of December 31, 2013.2014. During the years ended December 31, 20142015 and 2013,2014, net income generated by foreign subsidiaries for which the functional currency was not U.S. dollars was 35.1%37.0% and 29.6%35.1%, respectively. During the years ended December 31, 20142015 and 2013,2014, we recorded $20.3$13.1 million and $0.8$20.3 million of translation losses, respectively, within our consolidated statements of income and comprehensive income.
Item 8. Financial Statements and Supplementary Data
The information required is included in this Annual Report on Form 10-K beginning on page F-1.
Item 9. Changes In and Disagreements with Accountants on Accounting and Financial Disclosure
None.
Item 9A. Controls and Procedures
Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures
Based on management’s evaluation, with the participation of our Chief Executive Officer (CEO) and Chief Financial Officer (CFO), as of the end of the period covered by this report, our CEO and CFO have concluded that our disclosure

53


controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act), are effective to provide reasonable assurance that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and is accumulated and communicated to management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.
Changes in Internal Control Over Financial Reporting
There were no changes in our internal control over financial reporting during the quarter ended December 31, 20142015 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
Management’s Report on Internal Control Over Financial Reporting
Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles.
Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.
Based on this assessment, management concluded that our internal control over financial reporting was effective as of December 31, 20142015 to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles.

The effectiveness of our internal control over financial reporting as of December 31, 20142015 has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report, which appears in Part IV. Item 15 of this Annual Report on Form 10-K.

49



Inherent Limitations on Effectiveness of Controls

Our management, including the CEO and CFO, does not expect that our disclosure controls or our internal control over financial reporting will prevent or detect all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. The design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Further, because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, have been detected. The design of any system of controls is based in part on certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Projections of any evaluation of the effectiveness of controls to future periods are subject to risks. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures.
Item 9B. Other Information
None.

50


PART III
Item 10. Directors, Executive Officers and Corporate Governance
We incorporate by reference the information required by this Item from the information set forth under the captions “Board of Directors”, “Corporate Governance”, “Our Executive Officers”, and “Section 16(a) Beneficial Ownership Reporting Compliance” in our definitive proxy statement for our 20152016 annual meeting of stockholders, to be filed within 120 days after the end of the year covered by this Annual Report on Form 10-K, pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended ( the “2015our “2016 Proxy Statement”).



54


Item 11. Executive Compensation
We incorporate by reference the information required by this Item from the information set forth under the captions “Executive Compensation” and “Compensation Committee Interlocks and Insider Participation” in our 20152016 Proxy Statement.
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

We incorporate by reference the information required by this Item from the information set forth under the caption “Security Ownership of Certain Beneficial Owners and Management” in our 20152016 Proxy Statement.

Equity Compensation Plan Information
The following table sets forth information about awards outstanding as of December 31, 20142015 and securities remaining available for issuance under our 2015 Long-Term Incentive Plan (the “2015 Plan”), our 2012 Long-Term Incentive Plan (the “2012 Plan”), the Amended and Restated 2006 Stock Option Plan (the "2006 Plan"“2006 Plan”) and the 2012 Non-Employee Directors Compensation Plan (the “2012 Directors Plan”) as of December 31, 2014.2015.
Plan Category 
Number of securities
to be issued upon
exercise of outstanding options, warrants
and rights 
 
Weighted average
exercise price of
outstanding options,
warrants and rights 
 
Number of securities
remaining available for
future issuance under
equity compensation
plans (excluding
securities reflected in
column (a)) 
 
Number of securities
to be issued upon
exercise of outstanding options, warrants
and rights 
 
Weighted average
exercise price of
outstanding options,
warrants and rights 
 
Number of securities
remaining available for
future issuance under
equity compensation
plans (excluding
securities reflected in
column (a)) 
Equity compensation plans approved by security holders (1)
 6,838,746
 
(2) 
 $20.98
 
(3) 
 5,345,126
 
(4) 
Equity compensation plans approved by security holders: (1)
     7,211,440
 
(4) 
Stock options 7,450,914
 
(2) 
 $34.07
 
(3) 
   
Restricted stock unit awards 163,272
 $
 
(5) 
 
 
(5) 
Equity compensation plans not approved by security holders 
   $
   
   
 
  
 $
 
  
 
 
  
Total 6,838,746
   $20.98
   5,345,126
   7,614,186
   $34.07
   7,211,440
  
  
(1)This table includes the following stockholder approved plans: the 2015 Plan, 2012 Plan, the 2006 Plan and the 2012 Directors Plan. The restricted stock grant made to Karl Robb, our EVP and President of EU Operations on January 16, 2012 is not included.
(2)Represents the number of underlying shares of common stock associated with outstanding options under our stockholder approved plans and is comprised of 5,095,712134,025 shares underlying options granted under our 2015 Plan; 6,277,028 shares underlying options granted under our 2012 PlanPlan; and 1,743,0341,039,861 shares underlying options granted under our 2006 Plan.
(3)Represents the weighted-average exercise price of stock options outstanding under the 2015 Plan, the 2012 Plan and the 2006 Plan.
(4)Represents the number of shares available for future issuances under our stockholder approved equity compensation plans and is comprised of 4,785,7617,450,914 shares available for future issuance under the 20122015 Plan and 559,365554,070 shares available for future issuances under the 2012 Directors Plan.
(5)Not applicable.

Item 13. Certain Relationships and Related Transactions, and Director Independence
We incorporate by reference the information required by this Item from the information set forth under the caption “Certain Relationships and Related Transactions and Director Independence” in our 20152016 Proxy Statement.
Item 14. Principal Accountant Fees and Services
We incorporate by reference the information required by this Item from the information set forth under the caption “Independent Registered Public Accounting Firm” in our 20152016 Proxy Statement.


51


PART IV

Item 15. Exhibits, Financial Statement Schedules
(a)            We have filed the following documents as part of this annual report:
1.            Audited Consolidated Financial Statements

55


 Page
Report of Independent Registered Public Accounting FirmF-2
Consolidated Balance Sheets as of December 31, 20142015 and 20132014F-4
Consolidated Statements of Income and Comprehensive Income for Years Ended December 31, 2015, 2014 2013 and 20122013F-5
Consolidated Statements of Changes in Redeemable Preferred Stock and Stockholders’ Equity for Years Ended December 31, 2015, 2014 2013 and 20122013F-6
Consolidated Statements of Cash Flows for Years Ended December 31, 2015, 2014 2013 and 20122013F-8
Notes to Consolidated Financial Statements for Years Ended December 31, 2015, 2014 2013 and 20122013F-10
2.            Financial Statement Schedules
None. All schedules have been included in the consolidated financial statements or the notes thereto.
3.            Exhibits
A list of exhibits required to be filed as part of this Annual Report is set forth in the Exhibit Index.

5652


EXHIBIT INDEX
Exhibit
Number
 Description
   
3.1 Certificate of incorporation (incorporated herein by reference to Exhibit 3.1 to the Company’s Form 10-K for the fiscal year ended December 31, 2011, SEC File No. 001-35418, filed March 30, 2012 (the “2011 Form 10-K”))
3.2 Bylaws (incorporated herein by reference to Exhibit 3.2 to the 2011 Form 10-K)
4.1 Form of Common Stock Certificate (incorporated herein by reference to Exhibit 4.1 to Amendment No. 6 to Form S-1, SEC File No. 333-174827, filed January 23, 2012 (“Amendment No. 6”))
4.2 Amended and Restated Registration Rights Agreement dated February 19, 2008 (incorporated herein by reference to Exhibit 4.2 to Form S-1, SEC File No. 333-174827, filed June 10, 2011 (the “Registration Statement”))
4.3 Registration Rights Agreement dated April 26, 2010 (incorporated herein by reference to Exhibit 4.3 to the Registration Statement)
10.1† EPAM Systems, Inc. Amended and Restated 2006 Stock Option Plan (incorporated herein by reference to Exhibit 10.6 to Amendment No. 6)
10.2† Form of EPAM Systems, Inc. 2006 Stock Option Plan Award Agreement (under the EPAM Systems, Inc. Amended and Restated 2006 Stock Option Plan) (incorporated herein by reference to Exhibit 10.7 to Amendment No. 6)
10.3† EPAM Systems, Inc. 2012 Long-Term Incentive Plan (incorporated herein by reference to Exhibit 10.12 to Amendment No. 6)
10.4† Form of Senior Management Non-Qualified Stock Option Award Agreement (under the EPAM Systems, Inc. 2012 Long-Term Incentive Plan) (incorporated herein by reference to Exhibit 10.13 to Amendment No. 6)
10.5† Restricted Stock Award Agreement by and between Karl Robb and EPAM Systems, Inc. dated January 16, 2012 (incorporated herein by reference to Exhibit 10.14 to Amendment No. 6)
10.6† Form of Chief Executive Officer Restricted Stock Unit Award Agreement (under the EPAM Systems, Inc. 2012 Long-Term Incentive Plan) (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014, SEC File No. 001-35418, filed May 7, 2014 (the “Q1 2014 Form 10-Q”)
10.7† Form of Senior Management Restricted Stock Unit Award Agreement (under the EPAM Systems, Inc. 2012 Long-Term Incentive Plan) (incorporated by reference to Exhibit 10.2 to the Q1 2014 Form 10-Q)
10.8† Form of Chief Executive Officer Non-Qualified Stock Option Award Agreement (under the EPAM Systems, Inc. 2012 Long-Term Incentive Plan) (incorporated by reference to Exhibit 10.3 to the Q1 2014 Form 10-Q)
10.9† Form of Chief Executive Officer Restricted Stock Unit Award Agreement (under the EPAM Systems, Inc. 2012 Long-Term Incentive Plan) (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2015, SEC File No. 001-35418, filed May 7, 2015 (the “Q1 2015 Form 10-Q”)
10.10†Form of Senior Management Restricted Stock Unit Award Agreement (under the EPAM Systems, Inc. 2012 Long-Term Incentive Plan) (incorporated by reference to Exhibit 10.2 to the Q1 2015 Form 10-Q)
10.11†EPAM Systems, Inc. 2015 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K, SEC File No. 001-35418, filed June 15, 2015)
10.12†*Form of Chief Executive Officer Non-Qualified Stock Option Award Agreement (under the EPAM Systems, Inc. 2015 Long-Term Incentive Plan)
10.13†*Form of Chief Executive Officer Restricted Stock Unit Award Agreement (under the EPAM Systems, Inc. 2015 Long-Term Incentive Plan)
10.14†*Form of Senior Management Non-Qualified Stock Option Award Agreement (under the EPAM Systems, Inc. 2015 Long-Term Incentive Plan)
10.15†*Form of Senior Management Restricted Stock Unit Award Agreement (under the EPAM Systems, Inc. 2015 Long-Term Incentive Plan)
10.16†Amended and Restated EPAM Systems, Inc. Non-Employee Directors Compensation Plan (incorporated herein by reference to Exhibit 10.1510.3 to Amendment No. 6)the Q1 2015 Form 10-Q)
10.10†10.17† Form of Non-Employee Director Restricted Stock Award Agreement (under the EPAM Systems, Inc. 2012 Non-Employee Directors Compensation Plan) (incorporated herein by reference to Exhibit 10.16 to Amendment No. 6)
10.11†10.18† EPAM Systems, Inc. Non-Employee Director Compensation Policy (incorporated herein by reference to Exhibit 10.17 to Amendment No. 6)
10.12†Amendment toAmended and Restated Non-Employee Director Compensation Policy (incorporated herein by reference to Exhibit 10.4 to the Q1 20142015 Form 10-Q)

53


10.13†
10.19† Form of Director Offer Letter (incorporated herein by reference to Exhibit 10.18 to Amendment No. 6)
10.14†10.20† Executive Employment Agreement by and between Arkadiy Dobkin and EPAM Systems, Inc. dated January 20, 2006 (expired except with respect to Section 8) (incorporated herein by reference to Exhibit 10.19 to Amendment No. 6)
10.15†10.21† Offer Letter by and between Ginger Mosier and EPAM Systems, Inc. dated February 24, 2010 (incorporated herein by reference to Exhibit 10.20 to Amendment No. 6)
10.16†10.22† Employment Contract by and between Balazs Fejes and EPAM Systems (Switzerland) GmbH. dated June 15, 2009 (incorporated herein by reference to Exhibit 10.21 to Amendment No. 6)
10.17†10.23† Consultancy Agreement by and between Landmark Business Development Limited, Balazs Fejes and EPAM Systems, Inc. dated January 20, 2006 (expired except with respect to Section 8) (incorporated herein by reference to Exhibit 10.22 to Amendment No. 6)

57


10.18†10.24† Consultancy Agreement by and between Landmark Business Development Limited, Karl Robb and EPAM Systems, Inc. dated January 20, 2006 (expired except with respect to Section 8) (incorporated herein by reference to Exhibit 10.23 to Amendment No. 6)
10.19†10.25† Form of nondisclosure, noncompete and nonsolicitation agreement (incorporated herein by reference to Exhibit 10.24 to Amendment No. 6)
10.20†10.26† Form of Indemnification Agreement (incorporated herein by reference to Exhibit 10.25 to Amendment No. 6)
10.21Credit Agreement by and among EPAM Systems, Inc., as Borrower, The Guarantors Parties Hereto, and PNC Bank, National Association, as Lender dated January 15, 2013 (incorporated herein by reference to Exhibit 10.25 to the Company’s Form 10-K for the fiscal year ended December 31, 2012, SEC File No. 001-35418, filed March 11, 2013 (the “2012 Form 10-K”))
10.22Guaranty and Suretyship Agreement between EPAM Systems LLC, a New Jersey limited liability company, and Vested Development, Inc., a Delaware corporation, and PNC Bank, National Association dated January 15, 2013 (incorporated herein by reference to Exhibit 10.26 to the 2012 Form 10-K)
10.23Security Agreement between EPAM Systems, Inc., a Delaware corporation, EPAM Systems LLC, a New Jersey limited liability company, and Vested Development, Inc., a Delaware corporation, and PNC Bank, National Association dated January 15, 2013 (incorporated herein by reference to Exhibit 10.27 to the 2012 Form 10-K)
10.24Pledge Agreement to loan documents between EPAM Systems, Inc. a Delaware corporation, EPAM Systems LLC, a New Jersey limited liability company, and Vested Development, Inc., a Delaware corporation, and PNC Bank, National Association dated January 15, 2013 (incorporated herein by reference to Exhibit 10.28 to the 2012 Form 10-K)
10.25 Credit Agreement dated as of September 12, 2014 by and among EPAM Systems, Inc. (as borrower), the lenders and guarantors party thereto, and PNC Bank, National Association, as Administrative Agent (incorporated hereby by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed September 9, 2014, SEC File No. 001-35418)
18.1 Letter re Changes in Accounting Principles (incorporated herein by reference to Exhibit 18.1 to the Company'sCompany’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013, SEC File No. 001-35418, filed March 11, 2014).
21.1* Subsidiaries of the Registrant
23.1* Consent of Independent Registered Public Accounting Firm
31.1* Certification of the Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934
31.2* Certification of the Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934
32.1* Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2* Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS** XBRL Instance Document
101.SCH** XBRL Taxonomy Extension Schema Document
101.CAL** XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF** XBRL Taxonomy Extension Definition Linkbase Document
101.LAB** XBRL Taxonomy Extension Label Linkbase Document
101.PRE** XBRL Taxonomy Extension Presentation Linkbase Document
   
 Indicates management contracts or compensatory plans or arrangements
* Exhibits filed herewith
** As provided in Rule 406T of Regulation S-T, this information is furnished and not filed for purposes of Section 11 and 12 of the Securities Act of 1933, as amended, and Section 18 of the Securities Exchange Act of 1934, as amended.


5854


SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: March 2, 2015February 22, 2016
 EPAM SYSTEMS, INC.
   
 By:/s/ Arkadiy Dobkin
  Name: Arkadiy Dobkin
  
Title: Chairman, Chief Executive Officer and President
(principal executive officer)
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
Signature Title Date
     
/s/ Arkadiy Dobkin 
Chairman, Chief Executive Officer and President
(principal executive officer)
 
 
March 2, 2015February 22, 2016
Arkadiy Dobkin
     
/s/ Anthony J. Conte 
Senior Vice President, Chief Financial Officer and Treasurer
(principal financial officer and principal accounting officer)
 
 
March 2, 2015February 22, 2016
Anthony J. Conte
     
/s/ Karl Robb Director 
 
March 2, 2015February 22, 2016
Karl Robb
  
     
/s/ Peter Kuerpick Director 
 
March 2, 2015February 22, 2016
Peter Kuerpick
  
     
/s/ Richard Michael Mayoras Director 
 
March 2, 2015February 22, 2016
Richard Michael Mayoras
  
     
/s/ Robert E. Segert Director 
 
March 2, 2015February 22, 2016
Robert E. Segert
  
     
/s/ Ronald P. Vargo Director 
 
March 2, 2015February 22, 2016
Ronald P. Vargo
  


5955


EPAM SYSTEMS, INC.
FORM 10-K
FOR THE YEAR ENDED DECEMBER 31, 20142015
TABLE OF CONTENTS

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

F-1



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of EPAM Systems, Inc.

We have audited the accompanying consolidated balance sheets of EPAM Systems, Inc. and subsidiaries (the "Company") as of December 31, 20142015 and 2013,2014, and the related consolidated statements of income and comprehensive income, redeemable preferred stock andchanges in stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2014.2015. These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position of EPAM Systems, Inc. and subsidiaries as of December 31, 20142015 and 2013,2014, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2014,2015, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, such financial statements taken as a whole, present fairly, in all material respects, the information set forth therein.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the Company's internal control over financial reporting as of December 31, 2014,2015, based on the criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated March 2, 2015February 22, 2016 expressed an unqualified opinion on the Company's internal control over financial reporting.


/s/ DELOITTE & TOUCHE LLP


Philadelphia, Pennsylvania
March 2, 2015February 22, 2016




F-2


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of EPAM Systems, Inc.

We have audited the internal control over financial reporting of EPAM Systems, Inc. and subsidiaries (the "Company") as of December 31, 2014,2015, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. The Company's management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying the Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company's internal control over financial reporting based on our audit.
We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
A company's internal control over financial reporting is a process designed by, or under the supervision of, the company's principal executive and principal financial officers, or persons performing similar functions, and effected by the company's board of directors, management, and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of the inherent limitations of internal control over financial reporting, including the possibility of collusion or improper management override of controls, material misstatements due to error or fraud may not be prevented or detected on a timely basis. Also, projections of any evaluation of the effectiveness of the internal control over financial reporting to future periods are subject to the risk that the controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2014,2015, based on the criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated financial statementsas of and for the year ended December 31, 20142015 of the Company and our report dated March 2, 2015February 22, 2016 expressed an unqualified opinion on those financial statements and financial statement schedule.

statements.
DELOITTE & TOUCHE LLP
Philadelphia, Pennsylvania
March 2, 2015 February 22, 2016 



F-3


EPAM SYSTEMS INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(US Dollars in thousands, except share and per share data)
As of  
 December 31, 
 2014
 As of  
 December 31, 
 2013
As of  
 December 31, 
 2015
 As of  
 December 31, 
 2014
Assets      
Current assets      
Cash and cash equivalents$220,534
 $169,207
$199,449
 $220,534
Accounts receivable, net of allowance of $2,181 and $1,800, respectively124,483
 95,431
Time deposits30,181
 
Accounts receivable, net of allowance of $1,729 and $2,181, respectively174,617
 124,483
Unbilled revenues55,851
 43,108
95,808
 55,851
Prepaid and other current assets9,289
 14,355
14,344
 9,289
Employee loans, net of allowance of $0 and $0, respectively, current2,434
 1,989
2,689
 2,434
Time deposits
 1,188
Restricted cash, current
 298
Deferred tax assets, current2,496
 5,392
11,847
 2,496
Total current assets415,087
 330,968
528,935
 415,087
Property and equipment, net55,134
 53,315
60,499
 55,134
Restricted cash, long-term156
 225
238
 156
Employee loans, net of allowance of $0 and $0, respectively, long-term4,081
 4,401
3,649
 4,081
Intangible assets, net47,689
 13,734
46,860
 47,689
Goodwill57,417
 22,268
115,930
 57,417
Deferred tax assets, long-term11,094
 4,557
18,312
 11,094
Other long-term assets3,368
 3,409
4,113
 3,368
Total assets$594,026
 $432,877
$778,536
 $594,026
      
Liabilities 
  
 
  
Current liabilities 
  
 
  
Accounts payable$4,641
 $2,835
$2,576
 $4,641
Accrued expenses and other liabilities32,203
 20,175
60,384
 32,203
Deferred revenue, current3,220
 4,543
3,047
 3,220
Due to employees24,518
 12,665
32,067
 24,518
Taxes payable24,704
 14,171
29,472
 24,704
Contingent consideration, current (Note 2 and 17)35,524
 
Contingent consideration, current (Note 2 and 16)
 35,524
Deferred tax liabilities, current603
 275
365
 603
Total current liabilities125,413
 54,664
127,911
 125,413
Deferred revenue, long-term
 533
Taxes payable, long-term
 1,228
Long-term debt35,000
 
Deferred tax liabilities, long-term4,563
 351
2,402
 4,563
Total liabilities129,976
 56,776
165,313
 129,976
Commitments and contingencies (Note 16)

 

Commitments and contingencies (Note 15)

 

Stockholders’ equity 
  
 
  
Common stock, $0.001 par value; 160,000,000 authorized; 48,748,298 and 47,569,463 shares issued, 48,303,811 and 46,614,916 shares outstanding at December 31, 2014 and December 31, 2013, respectively48
 46
Common stock, $0.001 par value; 160,000,000 authorized; 50,177,044 and 48,748,298 shares issued, 50,166,537 and 48,303,811 shares outstanding at December 31, 2015 and December 31, 2014, respectively49
 48
Additional paid-in capital229,501
 195,585
303,363
 229,501
Retained earnings260,598
 190,986
345,054
 260,598
Treasury stock(4,043) (8,684)(93) (4,043)
Accumulated other comprehensive loss(22,054) (1,832)(35,150) (22,054)
Total stockholders’ equity464,050
 376,101
613,223
 464,050
Total liabilities and stockholders’ equity$594,026
 $432,877
$778,536
 $594,026
The accompanying notes are an integral part of the consolidated financial statements.

F-4



EPAM SYSTEMS INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
(US Dollars in thousands, except share and per share data)
For the Years Ended December 31,For the Years Ended December 31,
2014 2013 20122015 2014 2013
Revenues$730,027
 $555,117
 $433,799
$914,128
 $730,027
 $555,117
Operating expenses:     
     
Cost of revenues (exclusive of depreciation and amortization)456,530
 347,650
 270,361
566,913
 456,530
 347,650
Selling, general and administrative expenses163,666
 116,497
 85,868
222,759
 163,666
 116,497
Depreciation and amortization expense17,483
 15,120
 10,882
17,395
 17,483
 15,120
Goodwill impairment loss2,241
 
 

 2,241
 
Other operating expenses/(income), net3,924
 (643) 682
1,094
 3,924
 (643)
Income from operations86,183
 76,493
 66,006
105,967
 86,183
 76,493
Interest and other income, net4,769
 3,077
 1,941
4,731
 4,769
 3,077
Change in fair value of contingent consideration(1,924) 
 

 (1,924) 
Foreign exchange loss(2,075) (2,800) (2,084)(4,628) (2,075) (2,800)
Income before provision for income taxes86,953
 76,770
 65,863
106,070
 86,953
 76,770
Provision for income taxes17,312
 14,776
 11,379
21,614
 17,312
 14,776
Net income$69,641
 $61,994
 $54,484
$84,456
 $69,641
 $61,994
Foreign currency translation adjustments(20,251) (811) 2,493
(13,096) (20,251) (811)
Comprehensive income$49,390
 $61,183
 $56,977
$71,360
 $49,390
 $61,183
Net income allocated to participating securities
 
 (3,341)
Net income available for common stockholders$69,641
 $61,994
 $51,143
          
Net income per share:     
     
Basic$1.48
 $1.35
 $1.27
$1.73
 $1.48
 $1.35
Diluted$1.40
 $1.28
 $1.17
$1.62
 $1.40
 $1.28
Shares used in calculation of net income per share:     
     
Basic47,189
 45,754
 40,190
48,721
 47,189
 45,754
Diluted49,734
 48,358
 43,821
51,986
 49,734
 48,358

The accompanying notes are an integral part of the consolidated financial statements.


F-5


EPAM SYSTEMS, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CHANGES IN
REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY
(US Dollars in thousands, except share data) 
For the Years Ended December 31, 2014, 2013 and 2012 
Series A-1 and A-2, Convertible Redeemable Preferred Stock Series A-3 Convertible Preferred Stock Common Stock Additional Paid-in Capital Retained Earnings Treasury Stock Accumulated Other Comprehensive Income Total Stockholders' EquityCommon Stock Additional Paid-in Capital Retained Earnings Treasury Stock Accumulated Other Comprehensive Income Total Stockholders’ Equity
Shares Amount Shares Amount Shares Amount          Shares Amount          
Balance, December 31, 20112,439,739
 $85,940
 290,277
 $
 17,158,904
 $17
 $40,020
 $74,508
 $(15,972) $(3,514) $95,059
Conversion to common stock(2,439,739) (85,940) (290,277) 
 21,840,128
 22
 85,918
 
 
 
 85,940
Initial public offering of common stock
 
 
 
 2,900,000
 3
 32,361
 
 
 
 32,364
Offering issuance costs
 
 
 
 
 
 (3,395) 
 
 
 (3,395)
Issuance of restricted stock
 
 
 
 213,656
 
 
 
 
 
 
Stock issued in connection with acquisition of Instant Information
 
 
 
 53,336
 
 640
 
 
 
 640
Stock issued in connection with acquisition of Thoughtcorp, Inc.
 
 
 
 434,546
 
 (346) 
 3,953
 
 3,607
Stock issued in connection with acquisition of Empathy Lab, LLC
 
 
 
 326,344
 
 (2,969) 
 2,969
 
 
Stock-based compensation expense
 
 
 
 
 
 6,826
 
 
 
 6,826
Proceeds from stock options exercises
 
 
 
 1,515,580
 2
 4,963
 
 
 
 4,965
Treasury stock retirement
 
 
 
 
 
 (353) 
 353
 
 
Excess tax benefits
 
 
 
 
 
 3,297
 
 
 
 3,297
Currency translation adjustment
 
 
 
 
 
 
 
 
 2,493
 2,493
Net income
 
 
 
 
 
 
 54,484
 
 
 54,484
Balance, December 31, 2012
 $
 
 $
 44,442,494
 $44
 $166,962
 $128,992
 $(8,697) $(1,021) $286,280
44,442,494
 $44
 $166,962
 $128,992
 $(8,697) $(1,021) $286,280
Stock-based compensation expense
 
 
 
 
 
 13,150
 
 
 
 13,150

 
 13,150
 
 
 
 13,150
Stock issued under the 2012 Non-Employee Directors Compensation Plan
 
 
 
 14,041
 
 
 
 
 
 
14,041
 
 
 
 
 
 
Stock issued in connection with acquisition of Empathy Lab, LLC
 
 
 
 1,483
 
 (13) 
 13
 
 
Stock issued in connection with acquisition of Empathy Lab1,483
 
 (13) 
 13
 
 
Proceeds from stock options exercises
 
 
 
 2,156,898
 2
 9,285
 
 
 
 9,287
2,156,898
 2
 9,285
 
 
 
 9,287
Excess tax benefits
 
 
 
 
 
 6,201
 
 
 
 6,201

 
 6,201
 
 
 
 6,201
Currency translation adjustment
 
 
 
 
 
 
 
 
 (811) (811)
 
 
 
 
 (811) (811)
Net income
 
 
 
 
 
 
 61,994
 
 
 61,994

 
 
 61,994
 
 
 61,994
Balance, December 31, 2013
 $
 
 $
 46,614,916
 $46
 $195,585
 $190,986
 $(8,684) $(1,832) $376,101
46,614,916
 $46
 $195,585
 $190,986
 $(8,684) $(1,832) $376,101
Stock issued in connection with acquisition of Netsoft (Note 2)2,289
 
 (21) 
 21
 
 
Stock issued in connection with acquisition of Jointech (Note 2)179,104
 
 1,158
 
 1,630
 
 2,788
Stock issued in connection with acquisition of GGA (Note 2)262,277
 
 (2,386) 
 2,386
 
 
Stock issued in connection with acquisition of Great Fridays (Note 2)90,864
 
 (827) 
 827
 
 
Stock issued under the 2012 Non-Employee Directors Compensation Plan (Note 14)7,738
 
 
 
 
 
 
Forfeiture of stock issued in connection with acquisition of Empathy Lab(24,474) 
 223
 
 (223) 
 
Stock-based compensation expense (net of liability awards)
 
 21,397
 
 
 
 21,397
Proceeds from stock options exercises1,171,097
 2
 10,596
 
 
 
 10,598
Excess tax benefits
 
 3,776
 
 
 
 3,776
Prior periods retained earning adjustment
 
 
 (29) 
 29
 
Currency translation adjustment
 
 
 
 
 (20,251) (20,251)
Net income
 
 
 69,641
 
 
 69,641
Balance, December 31, 201448,303,811
 $48
 $229,501
 $260,598
 $(4,043) $(22,054) $464,050
             
             

F-6


For the Years Ended December 31, 2014, 2013 and 2012 
Series A-1 and A-2, Convertible Redeemable Preferred Stock Series A-3 Convertible Preferred Stock Common Stock Additional Paid-in Capital Retained Earnings Treasury Stock Accumulated Other Comprehensive Income Total Stockholders' EquityCommon Stock Additional Paid-in Capital Retained Earnings Treasury Stock Accumulated Other Comprehensive Income Total Stockholders’ Equity
Shares Amount Shares Amount Shares Amount          Shares Amount          
Balance, December 31, 2013
 $
 
 $
 46,614,916
 $46
 $195,585
 $190,986
 $(8,684) $(1,832) $376,101
Stock issued in connection with acquisition of Netsoft LLC (Note 2)
 
 
 
 2,289
 
 (21) 
 21
 
 
Balance, December 31, 201448,303,811
 $48
 $229,501
 $260,598
 $(4,043) $(22,054) $464,050
Stock issued in connection with acquisition of Netsoft (Note 2)25,503
 
 (232) 
 232
 
 
Forfeiture of stock issued in connection with acquisition of Netsoft(1,482) 
 13
 
 (13) 
 
Stock issued in connection with acquisition of Jointech (Note 2)166,114
 
 3,488
 
 1,512
 
 5,000
Stock issued in connection with acquisition of GGA (Note 2)
 
 
 
 262,277
 
 (2,386) 
 2,386
 
 
233,753
 
 (2,127) 
 2,127
 
 
Stock issued in connection with acquisition of Jointech (Note 2)
 
 
 
 179,104
 
 1,158
 
 1,630
 
 2,788
Stock issued in connection with acquisition of Great Fridays (Note 2)
 
 
 
 90,864
 
 (827) 
 827
 
 
10,092
 
 (11) 
 92
 
 81
Stock issued under the 2012 Non-Employee Directors Compensation Plan (Note 14)
 
 
 
 7,738
 
 
 
 
 
 
Forfeiture of stock issued in connection with acquisition of Empathy Lab
 
 
 
 (24,474) 
 223
 
 (223) 
 
Stock-based compensation expense (net of liability awards)
 
 
 
 
 
 21,397
 
 
 
 21,397
Stock issued under the 2012 Non-Employee Directors Compensation Plan (Note 13)5,295
 
   
 
 
 
Restricted stock unites vested17,625
 
 574
 
 
 
 574
Stock-based compensation expense (net of liability awards & RSU)
 
 43,120
 
 
 
 43,120
Proceeds from stock options exercises
 
 
 
 1,171,097
 2
 10,596
 
 
 
 10,598
1,405,826
 1
 20,674
 
 
 
 20,675
Excess tax benefits
 
 
 
 
 
 3,776
 
 
 
 3,776

 
 8,363
 
 
 
 8,363
Prior periods retained earning adjustment
 
 
 
 
 
 
 (29) 
 29
 
Currency translation adjustment
 
 
 
 
 
 
 
 
 (20,251) (20,251)
 
 
 
 
 (13,096) (13,096)
Net income
 
 
 
 
 
 
 69,641
 
 
 69,641

 
 
 84,456
 
 
 84,456
Balance, December 31, 2014
 $
 
 $
 48,303,811
 $48
 $229,501
 $260,598
 $(4,043) $(22,054) $464,050
Balance, December 31, 201550,166,537
 $49
 $303,363
 $345,054
 $(93) $(35,150) $613,223
The accompanying notes are an integral part of the consolidated financial statements.



F-7


EPAM SYSTEMS INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
(US Dollars in thousands) For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Cash flows from operating activities:            
Net income $69,641
 $61,994
 $54,484
 $84,456
 $69,641
 $61,994
Adjustments to reconcile net income to net cash provided by operating activities:  
  
    
  
  
Depreciation and amortization 17,483
 15,120
 10,882
 17,395
 17,483
 15,120
Bad debt expense 817
 335
 662
 1,407
 817
 335
Deferred taxes (3,270) 41
 (3,933) (15,328) (3,270) 41
Stock-based compensation expense 24,620
 13,150
 6,826
 45,833
 24,620
 13,150
Impairment and acquisition related charges 7,907
 
 
Impairment charges and acquisition related adjustments (1,183) 7,907
 
Excess tax benefit on stock-based compensation plans (3,776) (6,201) (3,297) (8,363) (3,776) (6,201)
Non-cash stock charge 
 
 640
Other 735
 1,199
 (66) 3,883
 735
 1,199
Changes in operating assets and liabilities:  
  
    
  
  
(Increase)/ decrease in operating assets:  
  
    
  
  
Accounts receivable (30,410) (17,302) (12,664) (47,694) (30,410) (17,302)
Unbilled revenues (11,134) (9,833) (6,905) (38,076) (11,134) (9,833)
Prepaid expenses and other assets 565
 587
 (1,339) (574) 565
 587
Increase/ (decrease) in operating liabilities:  
  
    
  
  
Accounts payable (2,603) (2,900) 1,407
 (2,781) (2,603) (2,900)
Accrued expenses and other liabilities 11,492
 501
 (5,825) 26,563
 11,492
 501
Deferred revenues (1,514) (2,325) (767) (869) (1,514) (2,325)
Due to employees 7,453
 785
 2,896
 2,752
 7,453
 785
Taxes payable 16,868
 3,074
 5,498
 8,972
 16,868
 3,074
Net cash provided by operating activities 104,874
 58,225
 48,499
 76,393
 104,874
 58,225
Cash flows from investing activities:  
  
    
  
  
Purchases of property and equipment (11,916) (13,360) (13,376) (13,272) (11,916) (13,360)
Payment for construction of corporate facilities (3,924) (2,560) (13,701) (4,692) (3,924) (2,560)
Employee housing loans (1,740) (7,982) 
 (2,054) (1,740) (7,982)
Proceeds from repayments of employee housing loans 1,793
 2,189
 
 2,249
 1,793
 2,189
Decrease in restricted cash and time deposits, net 1,430
 429
 470
Increase in restricted cash and time deposits, net (29,944) 1,430
 429
Increase in other long-term assets, net (1,479) (516) (69) (708) (1,479) (516)
Payments for foreign currency derivatives (165) 
 
Acquisition of businesses, net of cash acquired (Note 2) (37,093) (20) (32,951) (76,908) (37,093) (20)
Net cash used in investing activities (52,929) (21,820) (59,627) (125,494) (52,929) (21,820)
Cash flows from financing activities:  
  
    
  
  
Proceeds related to stock options exercises 10,571
 9,300
 4,951
 20,675
 10,571
 9,300
Excess tax benefit on stock-based compensation plans 3,776
 6,201
 3,297
 8,363
 3,776
 6,201
Net proceeds from issuance of common stock in initial public offering 
 
 32,364
Costs related to stock issue 
 
 (1,765)
Acquisition of business, deferred consideration (4,000) 
 
Proceeds from borrowing under line of credit (Note 12) 35,000
 
 
Acquisition of business, deferred consideration (Note 2) (30,274) (4,000) 
Net cash provided by financing activities 10,347
 15,501
 38,847
 33,764
 10,347
 15,501
Effect of exchange rate changes on cash and cash equivalents (10,965) (811) 1,597
 (5,748) (10,965) (811)
Net increase in cash and cash equivalents 51,327
 51,095
 29,316
Net increase/ (decrease) in cash and cash equivalents (21,085) 51,327
 51,095
Cash and cash equivalents, beginning of period 169,207
 118,112
 88,796
 220,534
 169,207
 118,112
Cash and cash equivalents, end of period $220,534
 $169,207
 $118,112
 $199,449
 $220,534
 $169,207
Supplemental disclosures of cash paid:            
Income taxes $11,756
 $10,207
 $13,065
 $25,071
 $11,756
 $10,207
Bank interest $7
 $26
 $14
 $124
 $7
 $26


F-8



Noncash operating activities:
IncludedFor the year 2014, included in the one timeImpairment charges and acquisition related adjustments line reported amount is the goodwill impairment loss of $2,241, contingent consideration fair value adjustment of $1,924, and write off related to the building construction in Minsk, Belarus of $3,742.

Noncash financing activities:activities recorded in connection with acquisitions of businesses:
IncludedDeferred consideration payable was $603 in Impairment2015, $1,022 in 2014 and acquisition related charges0 in 2013.
Deferred consideration payable in connection with acquisitions of businesses was $1,022 in 2014 and $0 in 2013 and 2012.
Contingent consideration payable in connection with acquisitions of businesses was $36,322 in 2014 and $0 in 2013 and 2012.
Total incurred but not paid costs related to acquisition of businesses were $0 in 2014 and 2013, $96 in 2012.
Contingent consideration payable was $0 in 2015, $36,322 in 2014 and 0 in 2013.

The accompanying notes are an integral part of the consolidated financial statements.

F-9


EPAM SYSTEMS INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
AS OF DECEMBER 31, 20142015 AND 20132014
AND FOR THE YEARS ENDED DECEMBER 31, 20142015, 20132014 AND 20122013
(US Dollars in thousands, except share and per share data) 
1.NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
EPAM is a leading global provider of complex software product engineering, solutionstechnology consulting and information technology ("IT") servicesdigital expertise to clients throughoutlocated around the world, primarily in North America, WesternEurope, Asia and Eastern Europe, Russia and Asia.the CIS region. The Company serves primarily Fortune Global 2000 companieshas expertise in various industries, with the main focus on Independent Software Vendors (“ISVs”)including software and technology, banking andhi-tech, financial services, business information and media and entertainment, travel and hospitality. Other industries includehospitality, retail energy,and distribution and life sciences healthcare, telecommunications, and government.
Since EPAM’s inception in 1993, the Company has focused on providing software product development services, software engineering and vertically-oriented custom development solutions through its global delivery model. This has served as a foundation for the Company’s other solutions, including custom application development, application testing, platform-based solutions, application maintenance and support, and infrastructure management.healthcare.
The Company is incorporated in Delaware with headquarters in Newtown, PA, with multiplePA. The Company EPAM serves clients worldwide utilizing an award-winning global delivery centers located in Belarus, Ukraine, Russia, Hungary, Kazakhstan, Bulgaria, China, Armeniaplatform and Poland, and client managementits locations in the United States, Canada, the United Kingdom, Germany, Sweden, Switzerland, Netherlands, Russia, Kazakhstan, Singapore, Hong Kongover 20 countries across North America, Europe, Asia and Australia.
Emerging growth company status — In April 2012, several weeks after EPAM’s initial public offering in February 2012, President Obama signed into law the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). The JOBS Act contains provisions that relax certain requirements for “emerging growth companies” that otherwise apply to larger public companies. For as long as a company retains emerging growth company status, it will not be required to (1) provide an auditor’s attestation report on the Company’s internal control over financial reporting, otherwise required by Section 404(b) of the Sarbanes-Oxley Act of 2002, (2) comply with any new or revised financial accounting standard applicable to public companies until such standard is also applicable to private companies, (3) comply with certain new requirements adopted by the Public Company Accounting Oversight Board, (4) provide certain disclosure regarding executive compensation required of larger public companies or (5) hold shareholder advisory votes on matters relating to executive compensation. Based on EPAM's market capitalization on June 30, 2014, it was deemed a large accelerated filer as of December 31, 2014. Therefore, EPAM no longer qualifies as an emerging growth company.
Principles of Consolidation — The consolidated financial statements include the financial statements of EPAM Systems, Inc. and its subsidiaries. All intercompany balances and transactions have been eliminated.
Use of Estimates — The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions. These estimates and assumptions affect reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as revenues and expenses during the reporting period. The Company bases its estimates and judgments on historical experience, knowledge of current conditions and its beliefs of what could occur in the future, given available information. Actual results could differ from those estimates, and such differences may be material to the financial statements.
Revenue Recognition — The Company recognizes revenue when realized or realizable and earned, which is when the following criteria are met: (1) persuasive evidence of an arrangement exists; (2) delivery has occurred; (3) the sales price is fixed or determinable; and (4) collectability is reasonably assured. Determining whether and when some of these criteria have been satisfied often involves assumptions and judgments that can have a significant impact on the timing and amount of revenue we report. If there is an uncertainty about the project completion or receipt of payment for the services, revenues are deferred until the uncertainty is sufficiently resolved. At the time revenues are recognized, the Company provides for any contractual deductions and reduces revenues accordingly. The Company defers amounts billed to its clients for revenues not yet earned. Such amounts are anticipated to be recorded as revenues as services are performed in subsequent periods. Unbilled revenues represent services provided which are billed subsequent to the period end in accordance with the contract terms.reported.
The Company derives its revenues from a variety of service offerings, which represent specific competencies of its IT professionals. Contracts for these services have different terms and conditions based on the scope, deliverables, and complexity of the engagement, which require management to make judgments and estimates in determining appropriate revenue recognition pattern. Fees for these contracts may be in the form of time-and-materials or fixed-price arrangements.

F-10

Table If there is an uncertainty about the project completion or receipt of Contentspayment for the consulting services, revenue is deferred until the uncertainty is sufficiently resolved. At the time revenue is recognized, the Company provides for any contractual deductions and reduces the revenue accordingly. The Company reports gross reimbursable “out-of-pocket” expenses incurred as both revenues and cost of revenues in the consolidated statements of income and comprehensive income.
The Company defers amounts billed to its clients for revenues not yet earned. Such amounts are anticipated to be recorded as revenues when services are performed in subsequent periods. Unbilled revenue is recorded when services have been provided but billed subsequent to the period end in accordance with the contract terms.

The Company reports gross reimbursable “out-of-pocket” expenses incurred as both revenues and cost of revenues in the consolidated statements of income and comprehensive income.
The majority of the Company’s revenues (84.7%(85.8% of revenues in 2015, 84.7% in 2014 and 82.3% in 2013 and 84.1% in 2012)2013) is generated under time-and-material contracts wherebywhere revenues are recognized as services are performed with the corresponding cost of providing those services reflected as cost of revenues when incurred.revenues. The majority of such revenues are billed on an hourly, daily or monthly basis wherebyas actual time is charged directly to the client.

F-10


Revenues from fixed-price contracts (13.6%(12.8% of revenues in 2015, 13.6% in 2014 and 15.7% in 2013 and 13.7% in 2012)2013) are determined using the proportional performance method. In instances where final acceptance of the product, system, or solution is specified by the client, revenues are deferred until all acceptance criteria have been met. In absence of a sufficient basis to measure progress towards completion, revenue is recognized upon receipt of final acceptance from the client. In order to estimate the amount of revenue for the period under the proportional performance method, the Company determines the percentage of actual labor hours incurred as compared to estimated total labor hours and applies that percentage to the consideration allocated to the deliverable. The complexity of the estimation process and factors relating to the assumptions, risks and uncertainties inherent with the application of the proportional performance method of accounting affects the amounts of revenues and related expenses reported in the Company’s consolidated financial statements. A number of internal and external factors can affect such estimates, including labor hours and specification and testing requirement changes. The cumulative impact of any revision in estimates is reflected in the financial reporting period in which the change in estimate becomes known. No significant revisions occurred in each of the three years ended December 31, 2015, 2014 2013 and 2012.2013. The Company’s fixed price contracts are generally recognized over a period of 12 months or less.
The Company reports gross reimbursable “out-of-pocket” expenses incurred as both revenues and cost of revenues in the consolidated statements of income and comprehensive income.
Cost of Revenues (Exclusive of Depreciation and Amortization) — Consists principally of salaries and bonuses of the revenue producing personnel, as well as employee benefits, stock compensation expense and non-reimbursable travel costs for IT professionals, and subcontractor fees.these professionals.
Selling, General and Administrative Expenses — Consist mainly of compensation, benefits and travel expenses associated with promotingof the officers, management, sales, marketing and selling the Company’s services andadministrative personnel. Other operation expenses include such items as the cost of advertising, and other promotional activities, as well as sales and marketing personnel salaries, stock compensation expense and related fringe benefits, commissions and travel. General and administrative expenses include other operating items such as officers’ and administrative personnel salaries, stock compensation expense and related fringe benefits as well as legal and audit expenses, recruitment and development efforts, insurance, provision for doubtful accounts, and operating lease expenses. In addition, the Company has issued stock to the sellers and/or personnel in connection with business acquisitions and has been recognizing stock-based compensation expense in the periods after the closing of these acquisitions as part of the selling, general and administrative expenses. Stock option expenses related to acquisitions comprised a significant portion of total selling, general and administrative stock-based compensation expense in 2014 and 2015.
Fair Value of Financial Instruments — The Company makes significant assumptions about fair values of its financial instruments. Fair value is determined based onassets and liabilities in accordance with the assumptions that market participants would use in pricing the asset or liability. The CompanyFinancial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 820, “Fair Value Measurement,” and utilizes the following fair value hierarchy in determining fair values:inputs used for valuation:
Level 1 — Quoted prices for identical assets or liabilities in active markets.
Level 2 — Inputs other than quoted prices within Level 1 that are observable either directly or indirectly, including quoted prices in markets that are not active, quoted prices in active markets for similar assets or liabilities, and observable inputs other than quoted prices such as interest rates or yield curves.
Level 3 — Unobservable inputs reflecting ourmanagement’s view about the assumptions that market participants would use in pricing the asset or liability.
Where the fair values of financial assets and liabilities recorded in the consolidated balance sheets cannot be derived from an active market, they are determined using a variety of valuation techniques. These valuation techniques include a net present value technique, comparison to similar instruments with market observable inputs, options pricing models and other relevant valuation models. InputsTo the extent possible, observable market data is used as inputs into these models are taken from observable market data whenever possible, but in instances wherewhen it is not reasonably feasible, a degree of judgment is required to establish fair values.
Financial Assets and Liabilities Measured At Fair Value on a Recurring Basis
The Company had no assets or liabilities measured at fair value on a recurring basis as of December 31, 2014 and 2013, other than contingent liabilities in connection with the acquisitions of businesses.
At December 31, 2014,Company’s contingent liabilities measured at fair value on a recurring basis are comprised contingent consideration payable in cash and stock, andof performance-based awards issued to certain former owners of the acquired businesses in exchange for future services.
Contingent liabilities are valued using significant inputs that are not observable in the market, which are defined as Level 3 inputs according to fair value measurement accounting. The Company estimates the fair value of contingent liabilities based on certain performance milestones of the acquired businesses and estimated probabilities of achievement, then discounts the liabilities to present value using the Company’s cost

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of debt for the cash component of contingent consideration, and risk free rate for the stock component of a contractual contingency. Contingent liabilities are valued using significant inputs that are not observable in the market which are defined as Level 3 inputs pursuant to fair value measurement accounting. The Company believes its estimates and assumptions are reasonable, however, there is significant judgment involved. Changes in the fair value of contingent consideration liabilities primarily result from changes in the timing and amount of specific milestone estimates and changes in probability assumptions with respect to the likelihood of achieving the various earnout criteria. These changes could cause a material impact to, and volatility in the Company’s operating results. See Note 1716 for contingent liabilities activity.

Financial Assets and Liabilities Measured At Fair Value on a Non-Recurring Basis
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Employee LoansThe amounts of the Company’s financial assets and liabilities, with the exceptions ofCompany issues employee housing loans in Belarus and otherrelocation loans to assist employees with relocation needs in connection with intra-company transfers. There are no loans issued to principal officers, directors, and their affiliates. Although permitted by authoritative guidance, we did not elect a fair value option for these financial instruments. These housing loans were measured at fair value upon initial recognition and subsequently carried at amortized cost less allowance for loan losses. Any difference between the carrying value and the fair value of a loan upon initial recognition is charged to expense. The Company intends to hold all employee loans described further herein, approximate fair value becauseuntil their maturity. Interest income is reported using the effective interest method. Where applicable, loan origination fees, net of their short-term maturities.direct origination costs, are deferred and recognized in interest income over the life of the loan.
Employee Housing Loans — The housing loans were classified asare measured using the Level 3 measurementsinputs within the fair value hierarchy because they wereare valued using significant unobservable inputs. The estimatedThese housing loans are measured at fair value upon initial recognition through the market approach under ASC Topic 820, “Fair Value Measurement” and subsequently carried at amortized cost less allowance for loan losses. Any difference between the carrying value and the fair value of these housing loansa loan upon initial recognition was computed by projecting the future contractual cash flowsis charged to be received from the loans and discounting those projected net cash flows to a present value, which is the estimated fair value (the “Income Approach”). In applying the Income Approach, the Company analyzed similar loans offered by third-party financial institutions in Belarusian Rubles (“BYR”) and adjusted the interest rates charged on such loans to exclude the effects of underlying economic factors, such as inflation and currency devaluation. The Company also assessed the probability of future defaults and associated cash flows impact. In addition, the Company separately analyzed the rate of return that market participants in Belarus would require when investing in unsecured USD-denominated government bonds with similar maturities (a “risk-free rate”) and evaluated a risk premium component to compensate the market participants for the credit and liquidity risks inherent in the loans’ cash flows. As a result of the analysis performed, the Company determined the carrying values of the housing loans issued during the year ended December 31, 2014 approximated their fair values upon initial recognition. The Company also estimated the fair values of the housing loans that were outstanding as of December 31, 2014 and 2013 using the inputs noted above and determined their fair values approximated the carrying values as of that date.expense.
Employee Loans, Other — The Company also issues short-term, non-interest bearing relocation loans and other employee loans. These loans are considered Level 3 measurements. The Company’s Level 3, unobservable inputs reflect its assumptions aboutto employees that relocated within the factors that market participants use in pricing similar receivables, and are based on the best information available in the circumstances.company. Due to the short-term natureshort term of employeethese loans (i.e., the relatively short time between the originationand high certainty of the instrument and its expected realization), therepayment, their carrying amount is a reasonable estimate of fair value. As of December 31, 2014, the carrying values of these employee loans approximated their fair values.value.
Business Combinations — The Company accounts for its business combinations using the acquisition accounting method, which requires it to determine the fair value of net assets acquired and the related goodwill and other intangible assets.assets in accordance with the FASB ASC Topic 805, “Business Combinations.” The Company identifies and attributes fair values and estimated lives to the intangible assets acquired and allocates the total cost of an acquisition to the underlying net assets based on their respective estimated fair values. Determining the fair value of assets acquired and liabilities assumed requires management’s judgment and involves the use of significant estimates, including projections of future cash inflows and outflows, discount rates, asset lives and market multiples. There are different valuation models for each component, the selection of which requires considerable judgment. These determinations will affect the amount of amortization expense recognized in future periods. The Company bases its fair value estimates on assumptions it believes are reasonable, but recognizes that the assumptions are inherently uncertain.
If initial accounting for the business combination has not been completed by the end of the reporting period in which the business combination occurs, provisional amounts are reported for which the accounting is incomplete, with retrospective adjustment made to such provisional amounts during the measurement period to present new information about facts and circumstances that existed as of the acquisition date. Once the measurement period ends, and in no case beyond one year from the acquisition date, revisions of the accounting for the business combination are recorded in earnings.
All acquisition-related costs, other than the costs to issue debt or equity securities, are accounted for as expenses in the period in which they are incurred. Changes in fair value of contingent consideration arrangements that are not measurement period adjustments are recognized in earnings. Payments to settle contingent consideration, if any, are reflected in cash flows from financing activities and the changes in fair value are reflected in cash flows from operating activities in the Company’s consolidated statements of cash flows.
The Company’s acquisitions usually do not have significant amounts of tangible assets, as the principalacquired assets typically acquired areconsist of customer relationships, trade names, non-competition agreements, and workforce. Asworkforce and as a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets.

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Cash and Cash Equivalents — Cash equivalents are short-term, highly liquid investments that are readily convertible into cash, with maturities of three months or less at the date acquired. As of December 31, 20142015 and 20132014 the Company had no cash equivalents.
Restricted Cash — Restricted cash represents cash that is restricted by agreements with third parties for special purposes and includes time deposits. See Note 6 for items that constitute restricted cash.
Accounts Receivable — Accounts receivable are stated net of an allowance for doubtful accounts. Outstanding accounts receivable are reviewed periodically and allowances are provided at such time the management believes it is probable that such balances will not be collected within a reasonable time. The allowance for doubtful accounts is determined by evaluating the relative creditworthiness of each client, historical collections experience and other information, including the aging of the receivables. Accounts receivable are generally written off when they are deemed uncollectible. Bad debts are recorded based on historical experience and management'smanagement’s evaluation of accounts receivable.

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The table below summarizes movements in qualifying accounts for the years ended December 31, 2015, 2014 2013 and 2012:2013:
  
Balance at
Beginning of
Period 
 
Charged to Costs
and Expenses 
 
Deductions/
Other 
 Balance at End of Year 
Allowance for Doubtful Accounts (Billed and Unbilled):        
Fiscal Year 2012 $2,250
 $1,244
 $(1,291) $2,203
Fiscal Year 2013 2,203
 619
 (1,022) 1,800
Fiscal Year 2014 1,800
 1,325
 (944) 2,181
Employee Loans — Loans are initially recorded at their fair value, and subsequently measured at their amortized cost, less allowance for loan losses, if any. The Company intends to hold all employee loans until their maturity. Interest income is reported using the effective interest method. Where applicable, loan origination fees, net of direct origination costs, are deferred and recognized in interest income over the life of the loan.
  
Balance at
Beginning of
Period 
 Charged to Costs and Expenses 
Deductions/
Other 
 Balance at End of Year 
Allowance for Doubtful Accounts (Billed and Unbilled):        
Fiscal Year 2013 $2,203
 $619
 $(1,022) $1,800
Fiscal Year 2014 1,800
 1,325
 (944) 2,181
Fiscal Year 2015 2,181
 1,704
 (2,156) 1,729
Property and Equipment — Property and equipment acquired in the ordinary course of the Company’s operations are stated at cost, net of accumulated depreciation. Depreciation is calculated on the straight-line basis over the estimated useful lives of the assets generally ranging from three to 50fifty years. Leasehold improvements are amortized on a straight-line basis over the shorter of the term of the lease or the estimated useful life of the improvement. Maintenance and repairs are expensed as incurred.
Goodwill and Other Intangible Assets — Goodwill and intangible assets that have indefinite useful lives are treated consistently with FASB ASC 350. They are tested annually for impairment350, “Intangibles - Goodwill and areOther.” The Company does not amortized.have any intangible assets with indefinite useful lives.
The Company assesses goodwill for impairment annually, and more frequently in certain circumstances. The Company initially performs an annuala qualitative assessment of goodwill to test for impairment test by comparingindicators. After applying the respectivequalitative assessment, if the entity concludes that it is not more likely than not that the fair value of its reporting units to their respectivegoodwill is less than the carrying values to identify if anyamount; the two-step goodwill impairment indicators exist.test is not required.
If the Company determines that it is more likely than not that the carrying amount exceeds the fair value, the Company performs a quantitative impairment test. If an indicator of impairment is identified, the implied fair value of the reporting unit’s goodwill is compared to its carrying amount, and the impairment loss is measured by the excess of the carrying value over the fair value. The fair values are estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings multiples based on market data. These valuations are considered Level 3 measurements under FASB ASC Topic 820. The Company utilizes estimates to determine the fair value of the reporting units such as future cash flows, growth rates, capital requirements, effective tax rates and projected margins, among other factors. Estimates utilized in the future evaluations of goodwill for impairment could differ from estimates used in the current period calculations. The Company is also required to assess the goodwill of its reporting units for impairment between annual assessment dates when events or circumstances dictate.
Intangible assets that have finite useful lives are amortized over their estimated useful lives on a straight-line basis. When facts and circumstances indicate potential impairment of amortizable intangible assets, the Company evaluates the recoverability of the asset’s carrying value, using estimates of future cash flows that utilize a discount rate determined by the management to be commensurate with the risk inherent in the Company’s business model over the remaining asset life. The estimates of future cash flows attributable to intangible assets require significant judgment based on the Company’s historical and anticipated results. Any impairment loss is measured by the excess of carrying value over fair value.
Effective in the fourth quarter of 2013, the Company changed the annual goodwill impairment assessment date for all of its reporting units from December 31st to October 31st, which represented a voluntary change in the annual goodwill impairment testing date. The Company evaluates the recoverability of goodwill at a reporting unit level and it had three reporting units, which had goodwill, that were subject to the annual impairment testing in 2014. See Note 3 for disclosure regarding goodwill and intangible assets.
Impairment of Long-Lived Assets — Long-lived assets, such as property and equipment, and finite lived intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset

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may not be recoverable and exceeds the asset'sasset’s fair value. When the carrying value of an asset is more than the sum of the undiscounted cash flows that are expected to result from the asset'sasset’s use and eventual disposition, it is considered to be unrecoverable. Therefore, when an asset’s carrying value will not be recovered and it is more than its fair value the Company would deem the asset to be impaired. Property and equipment held for disposal are carried at the lower of the current carrying value or fair value less estimated costs to sell. The Company did not incur any impairment of long-lived assets for the years ended December 31, 2015, 2014 2013 and 2012.2013.

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Income Taxes — The provision for income taxes includes federal, state, local and foreign taxes. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. Changes to enacted tax rates would result in either increases or decreases in the provision for income taxes in the period of changes. The Company evaluates the realizability of deferred tax assets and recognizes a valuation allowance when it is more likely than not that all, or a portion of, deferred tax assets will not be realized.
The realization of deferred tax assets is primarily dependent on future earnings. Any reduction in estimated forecasted results may require that we record valuation allowances against deferred tax assets. Once a valuation allowance has been established, it will be maintained until there is sufficient positive evidence to conclude that it is more likely than not that the deferred tax assets will be realized. A pattern of sustained profitability will generally be considered as sufficient positive evidence to reverse a valuation allowance. If the allowance is reversed in a future period, the income tax provision will be correspondingly reduced. Accordingly, the increase and decrease of valuation allowances could have a significant negative or positive impact on future earnings. See Note 10 to the consolidated financial statements for further information.
Changes in tax laws and rates may affect recorded deferred tax assets and liabilities and our effective tax rate in the future. The American Taxpayer Relief Act of 2012 (the “Act”) was signed into law on January 2, 2013. Because a change in tax law is accounted for in the period of enactment, certain provisions of the Act benefiting the Company’s 2012 U.S. federal taxes, including the Subpart F controlled foreign corporation look-through exception were not recognized in the Company’s 2012 financial results and instead were reflected in the Company’s 2013 financial results.
Earnings per Share (“EPS”) — Basic EPSearnings per share is computed by dividing the net income applicableavailable to common stockholders for the periodshareholders by the weighted averageweighted-average number of shares of common stock outstanding during the same period. The Company’s Series A-1 Preferred, Series A-2 Preferred, and Series A-3 Preferred Stock, that had been outstanding and convertible into common stock until February 13, 2012 (the date of the Company’s initial public offering), and our puttable common stock were considered participating securities since these securities had non-forfeitable rights to dividends or dividend equivalents during the contractual period and thus required the two-class method of computing EPS. When calculating diluted EPS, the numeratorDiluted earnings per share is computed by adding backdividing income available to common shareholders by the undistributed earnings allocated to the participating securities in arriving at the basic EPS and then reallocating such undistributed earnings among ourweighted-average number of shares of common stock participating securities andoutstanding during the potential common shares that result from the assumed exercise of all dilutive options. The denominator isperiod increased to include the number of additional shares of common sharesstock that would have been outstanding hadif the optionspotentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options, unvested restricted stock and unvested RSUs. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method.
Stock-Based CompensationEquity-based compensationThe Company recognizes the cost relating to the issuance of its share-based incentive awards to employees is based on the fair value of the award at the date of grant which is expensed ratably over the requisite service period, net of estimated forfeitures. The forfeiture assumptioncost is ultimately adjusted to the actual forfeiture rate. Therefore, changes in the forfeiture assumptions may affect the timing of the total amount of expense recognizedexpensed evenly over the vestingservice period. The service period is the period over which the employee performs the related services, which is normally the same as the vesting period. Over time, the forfeiture assumption is adjusted to the actual forfeiture rate and such change may affect the timing of the total amount of expense recognized over the vesting period. Equity-based awards that do not require future service are expensed immediately. Equity-based awards that do not meet the criteria for equity classification are recorded inas liabilities and adjusted to fair value at the end of each reporting period. Distributions associated with liability-classified awards not expected to vest are accounted for as compensation expense in the consolidated statements of income and comprehensive income.
Off-Balance Sheet Financial InstrumentsIncludeThe Company uses the FASB ASC Topic 825, “Financial Instruments.” to identify and disclose off-balance sheet financial instruments, which include credit instruments, such as commitments to make employee loans and related guarantees, standby letters of credit and certain guarantees issued under customer contracts. The face amount for these items represents the exposure to loss, before considering available collateral or the borrower’s ability to repay. Such financial instruments are recorded when they are funded. Loss contingencies arising from off-balance sheet credit exposuresfinancial instruments are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. The Company does not believe there are such matters exists that will have a material effect on the consolidated financial statements.
Foreign Currency Translation — Assets and liabilities of consolidated foreign subsidiaries, whose functional currency is the local currency, are translated to U.S. dollars at period end exchange rates. Revenues and expenses are translated to U.S. dollars at daily exchange rates. The adjustment resulting from translating the financial statements of such foreign subsidiaries to

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U.S. dollars is reflected as a cumulative translation adjustment and reported as a component of accumulated other comprehensive income.
The Company reports the effect of exchange rate changes on cash balances held in foreign currencies as a separate item in the reconciliation of the changes in cash and cash equivalents during the period. Transaction gains and losses are included in the period in which they occur.
Risks and UncertaintiesPrincipally all of the Company’s IT delivery centers andAs a majorityresult of its employees are located in Central and Eastern Europe and the APAC region. As a result,global operations, the Company may be subject to certain inherent risks associated with international operations, including the application and imposition of protective legislation and regulations relating to import and export; difficulties in enforcing intellectual property and contractual rights; complying with a wide variety of foreign laws; potentially adverse tax consequences; tariffs, quotas and other trade protection methods; and overall foreign policy and variability of foreign economic conditions.risks. 
Concentration of Credit Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of employee loans receivable, cash and cash equivalents, trade accounts receivable and unbilled revenues. The Company maintains cash and cash equivalents and short-term investments with financial institutions. The Company determined that the Company'sCompany’s credit policies reflect normal industry terms and business risk and there is no expectation of non-performance by the counterparties. As of December 31, 2014, $59.32015, $103.7 million of total cash was held in CIS countries, with $34.2$79.5 million of that in Belarus. Banking and other financial systems in the CIS region are less developed and regulated than in some more developed markets, and legislation relating to banks and bank accounts is subject to varying interpretations and inconsistent application. Banks in the CIS region generally do not meet the banking standards of more developed markets and bank deposits made by corporate entities in the CIS region are not insured. The CIS banking sector remains subject to periodic instability and

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Changes in the transparencymarket behavior or decisions of the banking sector lags behind international standards. A banking crisis, bankruptcy or insolvency of banks that process or hold our funds, particularly in Belarus, may result in the loss of our deposits orCompany’s clients could adversely affect our ability to complete banking transactions in the CIS region, which could materially adversely affect our business and financial condition.
AsCompany’s results of December 31, 2014, unbilled trade receivables from one customer, UBS AG, individually exceeded 10% and accounted for 16.5% of our total unbilled trade receivables as of that date. There were no customers individually exceeding 10% of our billed trade receivables as of December 31, 2014.
operations. During the years ended December 31, 2015, 2014 2013 and 2012,2013, revenues from our top five customers were $298,063, $239,396 $169,987 and $134,484,$169,987, respectively, representing 32.8%32.6%, 30.6%32.8% and 31.0%30.6%, respectively, of total revenues in the corresponding periods. Revenues from our top ten customers were $400,250, $320,126 and $234,955 in 2015, 2014 and $192,426 in 2014, 2013, and 2012, respectively, representing 43.9%43.8%, 42.3%43.9% and 44.4%42.3%, respectively, of total revenues in corresponding periods.
During the year ended December 31, 2014, the Company had one customer, UBS AG, with revenues of $97.6 million, which accounted for more than 10% of total revenues. No customer accounted for over 10% of total revenues in 2013 and 2012.
During the years ended December 31, 2014, 2013 and 2012 the Company incurred subcontractor costs of $1,885, $2,078 and $3,535, respectively, to a vendor for staffing, consulting, training, recruiting and other logistical / support services provided for the Company’s delivery and development operations in Eastern Europe. Such costs are included in cost of revenues and sales, general and administrative expenses, as appropriate, in the accompanying consolidated statements of income and comprehensive income.
Foreign currency risk — The Company generates revenues in various global markets based on client contracts obtained in non-U.S. dollar, currencies, principally, Euros,euros, British pounds sterling, Canadian dollars, and Russian rubles. The Company incursWe incur expenditures in non-U.S. dollar currencies, principally in Hungarian forints, Euros,euros, Russian rubles, andPolish zlotys, Mexican pesos, Hong Kong dollars and China yuan renminbi (“CNY”) associated with the ITour delivery centers located in the CEE, Europe, Mexico and APAC regions. The Company is exposed to fluctuations in foreign currency exchange rates primarily on accounts receivable and unbilled revenues from sales in these foreign currencies, and cash flows for expenditures in foreign currencies. The Company does not use derivative financial instruments to hedge the risk of foreign exchange volatility.
Interest rate risk — The Company’s exposure to market risk is influenced primarily by changes in interest rates on interest payments received on cash and cash equivalent deposits and paid on any outstanding balance on the Company'sCompany’s revolving line of credit, which is subject to a variety of rates depending on the type and timing of funds borrowed (see Note 12)12). The Company does not use derivative financial instruments to hedge the risk of interest rate volatility.

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Recent Accounting Pronouncements
In November 2014,2015, the Financial Accounting Standards Board (“FASB”)FASB issued Accounting Standards Update (“ASU”) 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes. The amendments in this update require that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position to simplify disclosure. The current requirement that deferred tax liabilities and assets of a tax-paying component of an entity be offset and presented as a single amount is not affected by the amendments in this update. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The implementation of this standard is not expected to have a material effect on the Company’s consolidated financial statements.
In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. The amendments in this update require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The update eliminates the current requirement to retrospectively adjust provisional amounts recognized at the acquisition date. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The implementation of this standard is not expected to have a material effect on the Company’s consolidated financial statements.
In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The update guides presentation of debt issuance costs and requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by this ASU. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The implementation of this standard is not expected to have a material effect on the Company’s consolidated financial statements.
In November 2014, the FASB issued ASU 2014-17, Business Combinations (Topic 805): Pushdown Accounting. The update provides an acquired entity with an option to apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. An acquired entity may also elect the option to apply pushdown accounting in the reporting period in which the change-in-control event occurs. However, if the financial statements for the period in which the most recent change-in-control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The amendment is effective on November 18, 2014. The implementation of this standard isdid not expected to have a material effect on the Company’s consolidated financial statements.
In November 2014, the FASB issued ASU 2014-16, Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity. The update aims to eliminate the use of different methods in practice and thereby reduce existing diversity under GAAP in the accounting for hybrid financial instruments issued in the form of a share. The amendments are effective for annual period and interim periods within those annual periods, beginning after December 15, 2015 with early adoption permitted. The implementation of this standard is not expected to have a material effect on the Company’s consolidated financial statements as the Company currently does not engage in derivatives and hedging.issue hybrid instruments.

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In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements-Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. The amendments in this update provide guidance about management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. These amendments aim to reduce diversity in the timing and content of footnote disclosures. The amendments in this update are effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter, with early adoption permitted. The implementation of this standard is not expected to have a material effect on the Company’s consolidated financial statements.
In June 2014, the FASB issued ASU 2014-12, Compensation - Stock Compensation (Topic 718), which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. A reporting entity should apply existing guidance in Topic 718, Compensation - Stock Compensation, as it relates to awards with performance conditions that affect vesting to account for such awards. The standard is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015 with early adoption permitted. Entities may apply the amendments in this ASU either: (a) prospectively to all awards granted or modified after the effective datedate; or (b) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter. The implementation of this standard is not expected to have a material effect on the Company’s consolidated financial statements.
In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which impacts virtually all aspects of an entity’s revenue recognition. The ASU introduces a new five-step revenue recognition model in which an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU also requires disclosures sufficient to enable users to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including qualitative and quantitative disclosures about contracts with customers, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. This standard iswill be effective for fiscalthe Company beginning in its first quarter of 2017. In July 2015, the FASB deferred the effective date until the annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016, including interim periods within that reporting period.2017. The Company is currently evaluating the impact this new guidance to determine the impact itstandard will have on its consolidated financial statements.
In April 2014, the FASB issued ASU 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies the related disclosure requirements. To qualify as a discontinued operation the standard requires a disposal to represent a strategic shift that has, or will have, a major effect on an entity'sentity’s operations and financial results. The standard also expands the disclosures for discontinued operations and requires new disclosures related to individually material dispositions that do not qualify as discontinued operations. The standard is effective prospectively for fiscal periods beginning after December 15, 2014, including interim periods within that reporting period, with early adoption permitted. The implementation of this standard isdid not expected to have a material impact on the Company’s consolidated financial statements, but will impact the reporting of any future dispositions.
In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. ASU 2013-11 is a new accounting standard on the financial statement presentation of unrecognized tax benefits. The new standard provides that a liability related to an

F-16


unrecognized tax benefit would be presented as a reduction of a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. The new standard became effective for the periods commencing January 1, 2014, and it should be applied prospectively to unrecognized tax benefits that exist at the effective date with retrospective application permitted. The Company adopted the ASU effective January 1, 2014. The adoption of this standard did not have any effect on the Company’s consolidated financial statements.
2.ACQUISITIONS
DuringAcquisitions completed during the year ended December 31, 2015 and December 31, 2014 the Company completed four acquisitions. The acquisitions intend to allowallowed the Company to expand into desirable geographic locations, complement the existing vertical markets, increase the volume of revenue and create new offerings of services currently provided. These acquisitions have been accounted for usingThe Company used the acquisition method for recordingof accounting to record these business combinations. Acquisitions arewere settled in cash and/or stock where a portion of the settlement price may behave been deferred. InFor some cases,transactions, purchase agreements contain contingent consideration in athe form of an earnout obligation.
2015 Acquisition
NavigationArts — On July 10, 2015, the Company acquired all of the outstanding equity of NavigationArts, Inc. and its subsidiary, NavigationArts, LLC (collectively “NavigationArts”). The U.S.-based NavigationArts provides digital consulting, architecture and content solutions and is regarded as a leading user-experience agency. The acquisition of NavigationArts added approximately 90 design consultants to the Company’s headcount. In connection with the NavigationArts acquisition the Company paid $28,747 as cash consideration, of which $2,670 was placed in escrow for a period of 18 months as security for the indemnification obligations of the sellers under the terms of the stock purchase agreement.
AGS— On November 16, 2015, the Company acquired all of the outstanding equity of Alliance Consulting Global Holdings, Inc including its wholly-owned direct and indirect subsidiaries Alliance Global Services, Inc., Alliance Global Services, LLC, companies organized under the laws of USA, and Alliance Global Services IT India, a company organized under the laws of India (collectively, “AGS”). AGS provides software product development services and test automation solutions and has multiple locations in the United States and India. The acquisition of AGS added 1,151 IT professionals to the

F-16


Company’s headcount in the United States and India. In connection with the AGS acquisition the Company paid $51,254 as cash consideration, of which $5,000 was placed in escrow for a period of 15 months as security for the indemnification obligations of the sellers under the terms of the stock purchase agreement. The Company also agreed to make a true-up payment in the amount of $603, that is recognized in the form of deferred consideration.

F-17


The following is a summary of the estimated fair values of the net assets acquired at the date of each respective acquisition during the year ended December 31, 2015 as originally reported in the quarterly condensed consolidated financial statements and at December 31, 2015:
 NavigationArts AGSTotal
 As Originally Reported At December 31, 2015 At December 31, 2015 As Originally Reported At December 31, 2015
Cash and cash equivalents$1,317
 $1,317
 $1,727
 $3,044
 $3,044
Trade receivables and other current assets3,920
 3,920
 10,600
 14,520
 14,520
Property and equipment and other long-term assets230
 230
 1,665
 1,895
 1,895
Deferred tax asset
 233
 4,996
 4,996
 5,229
Acquired intangible assets1,500
 2,800
 10,000
 11,500
 12,800
Goodwill23,822
 21,764
 33,815
 57,637
 55,579
Total assets acquired30,789
 30,264
 62,803
 93,592
 93,067
Accounts payable and accrued expenses871
 871
 3,087
 3,958
 3,958
Deferred revenue50
 50
 1,049
 1,099
 1,099
Due to employees596
 596
 3,010
 3,606
 3,606
Deferred tax liability525
 
 3,800
 4,325
 3,800
Total liabilities assumed2,042
 1,517
 10,946
 12,988
 12,463
Net assets acquired$28,747
 $28,747
 $51,857
 $80,604
 $80,604

The above estimated fair values of the assets acquired and liabilities assumed are provisional and based on the information that was available as of the acquisition date and updated for any changes as of December 31, 2015. During the three months ended on December 31, 2015 the Company received a preliminary independent valuation of intangible assets of NavigationArts that resulted in adjustments to goodwill, intangible assets and deferred tax asset and liability with no change to the net assets acquired.
The Company is gathering additional information necessary to finalize the estimated fair values of net assets acquired during 2015. The fair values reflected are subject to change and such changes could be significant. The Company expects to finalize the valuation and complete the purchase price allocation as soon as practicable but no later than one year from the respective acquisition dates.
The following table belowpresents the estimated fair values and useful lives of intangible assets acquired during the year ended December 31, 2015:
 NavigationArts AGS
 Weighted Average Useful Life (in years) Amount Weighted Average Useful Life (in years) Amount
Customer relationships10 $2,800
 10 $10,000
Total  $2,800
   $10,000

F-18


2014 Acquisitions
The following table discloses respective details of purchase price consideration of each acquisition.of the 2014 acquisitions:
Name of Acquisition Effective Date of Acquisition Common Shares 
Fair Value of Common
Shares
 Cash, Net of Working Capital and Other Adjustments 
Recorded Earnout
Payable
 Total Recorded Purchase Price Maximum Potential Earnout Payable
  Issued Deferred Issued Deferred Paid Deferred Cash Stock  
    (in shares) (in thousands)
Netsoft March 5, 2014 
 
 $
 $
 $2,373
 $1,022
 $1,825
 $
 $5,220
 $1,825
Jointech April 30, 2014 
 89,552
 
 2,788
 10,000
 4,000
 15,000
 5,000
 36,788
 20,000
GGA (1) June 6, 2014 
 
 
 
 14,892
 
 11,400
 
 26,292
 

Great Fridays October 31, 2014 
 
 
 
 10,854
 
 1,173
 
 12,027
 1,173
    
 89,552
 $
 $2,788
 $38,119
 $5,022
 $29,398
 $5,000
 $80,327
  
(1)The amount of the maximum potential earnout payable to GGA, if any, is not limited based on the terms of the purchase agreement.
Name of Acquisition Effective Date of Acquisition Common Shares 
Fair Value of Common
Shares
 Cash, Net of Working Capital and Other Adjustments 
Recorded Earnout
Payable
 Total Recorded Purchase Price Maximum Potential Earnout Payable
  Issued Deferred Issued Deferred Paid Deferred Cash Stock  
    (in shares) (in thousands)
Netsoft March 5, 2014 
 
 $
 $
 $2,403
 $1,022
 $1,825
 $
 $5,250
 $1,825
Jointech April 30, 2014 
 89,552
 
 2,788
 10,000
 4,000
 15,000
 5,000
 36,788
 20,000
GGA June 6, 2014 
 
 
 
 14,892
 
 11,400
 
 26,292
  
Great Fridays October 31, 2014 
 
 
 
 10,777
 
 1,173
 
 11,950
 1,173
    
 89,552
 $
 $2,788
 $38,072
 $5,022
 $29,398
 $5,000
 $80,280
  
Common shares issued in connection with acquisitions, if applicable, are valued at closing market prices as of the effective date of the respectiveapplicable acquisition. The maximum potential earnouts payableearnout payables disclosed in the foregoing table represent the maximum amount of additional consideration that could be paid pursuant to the terms of the purchase agreement for the applicable acquisition. The amounts recorded as earnouts payable,earnout payables, which are based upon the estimated future operating results of the acquired businesses within a seven-to twelve-monthseven-to twelve-month period subsequent to the acquisition date, are measured at fair value as of the acquisition date and are included on that basis in the recorded purchase price consideration in the foregoing table. The Company will recordrecords any subsequent changes in the fair value of the earnout obligations if any, in its consolidated income from operations. Please see Note 1716 for discussion around significant inputs and assumptions relating to the earnout obligation.obligations. All earnout obligations for these acquisitions have been settled.
Netsoft — On March 5, 2014, the Company completed an acquisition of substantially all of the assets and assumed certain specific liabilities of U.S.-based healthcare technology consulting firm Netsoft Holdings LLC and Armenia-based Ozsoft, LLC (collectively, “Netsoft”). As a result of this transaction, substantially all of the employees of Netsoft, including approximately 40 IT professionals, accepted employment with the Company. In connection with the Netsoft acquisition, the Company agreed to issue a total of 2,289 restricted shares of Company common stock as consideration for future services to key management and employees of Netsoft (the “Netsoft Closing Shares”). The Company agreed to pay a deferred consideration partially paid in stockconsisting partly of 9,154 restricted shares of Company common stock. Furthermore, subject to attainment of certain performance targets defined inDuring the purchase agreement,three months ended March 31, 2015, the Company will issueissued 16,349 restricted shares of Company common stock to Netsoft for achieving certain performance targets (collectively with the Netsoft Closing Shares, and deferred shares, the “Netsoft Employment Shares”). The Netsoft Employment Shares will vest in equal annual installments over a three-yearthree-year period starting from the date of acquisition. The first such installment vested during the first quarter of 2015. All unvested shares will be forfeited upon termination of services by the Company for cause or by the employee other than for good reason. The Netsoft Employment Shares had an estimated value of $1,017$1,017 at the time of grant and will bewere recorded as stock-based compensation expense over an associated service period of three years (Note 14)13). Under the terms of this agreement, all of the Netsoft Closing Shares, as well as $256,$256, were placed in escrow for a period of 18 months as security for the indemnification obligations of the sellers under the asset purchase agreement.
Jointech — On April 30, 2014, the Company acquired all of the outstanding equity of Joint Technology Development Limited, a company organized under the laws of Hong Kong, including its wholly-owned subsidiaries Jointech Software (Shenzhen) Co., Ltd., a company organized under the laws of China, and Jointech Software Pte. Ltd., a company organized

F-17

Table of Contents

under the laws of Singapore (collectively, “Jointech”). Jointech provides strategic technology services to multi-national organizations in investment banking, wealth and asset management. As a result of this transaction, substantially all employees of Jointech, including approximately 216 IT professionals, accepted employment with the Company. In connection with the Jointech acquisition, the Company agreed to issue a total ofissued 89,552 shares of the Company common stock to a former owner of Jointech as consideration for future services on or about the six-month anniversary from the date of acquisition (the “Jointech Closing Shares”). Furthermore, during the second quarter of 2015, the Company will pay to that former owner up to a maximum of $5,000 inissued 83,057 restricted shares of Company common stock determined based on the average closing price per shareto Jointech for the 30-trading day period preceding April 1, 2015achieving certain performance targets (collectively with the Jointech Closing Shares, the “Jointech Employment Shares”). The Jointech Employment Shares will vest in equal annual installments over a three-year period starting from the date of acquisition. The first such installment vested during the second quarter of 2015.
All unvested Jointech Employment Shares will be forfeited upon termination of services for cause by the Company or other than for good reason (as applicable) by either of the two former owners of the acquired business. The aggregate fair value of the Jointech Employment Shares at the date of grant was $7,788 and will be recorded as stock-based compensation expense over an associated service period of three years (Note 14)13).

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Table of Contents

Under the terms of the agreement, 15% of the total purchase price, in cash and stock, including the Jointech Employment Shares, was placed in an escrow account for a period of 18 months as security for the indemnification obligations of the sellers under the stock purchase agreement.
GGA — On June 6, 2014, the Company acquired substantially all of the assets and assumed certain specific liabilities of GGA Software Services, LLC, Institute of Theoretical Chemistry, Inc., and GGA’s Russian affiliate (collectively, “GGA”). Established in 1994, GGA develops scientific informatics applications and content databases; creates state-of-the-art algorithms and models; and delivers IT support, maintenance, and QA services to the world’s leading healthcare and life sciences companies. As a result of this transaction, substantially all employees of GGA, including approximately 329 IT professionals and 126 scientists, accepted employment with the Company. In connection with the GGA acquisition, the Company agreed to issue a total of 262,277 shares of the Company common stock to the former owners of GGA as consideration for future services (the “GGA Closing Shares”). Furthermore, subject to attainmentduring the second quarter of specified performance targets,2015, the Company will issueissued 233,753 restricted shares of Company common stock to the former owners of GGA shares of its common stock based on the formula provided in the purchase agreementfor achieving certain performance targets (collectively with the GGA Closing Shares, the “GGA Employment Shares”). The GGA Employment Shares will vest in equal annual installments over a three-year period starting from the date of acquisition. The first such installment vested during the second quarter of 2015. With respect to each former owner, all unvested shares will be forfeited upon either termination of services by the Company for cause or by the employee other than for good reason. The aggregate fair value of the GGA Employment Shares at the date of grant was $20,655 and will be recorded as stock-based expense over an associated service period of three years (Note 14)13). Under the terms of the agreement, a total of 102,631 of the GGA Employment Shares were placed into an escrow account for a period of 15 months as security for the indemnification obligations of the sellers under the asset purchase agreement.
Great Fridays — On October 31, 2014, the Company acquired 100%all of the outstanding equity interests of Great Fridays Limited and its subsidiaries with intent to expand the Company'sCompany’s product and design service portfolio. Great Fridays Limited, headquartered in Manchester, UK, with offices in London, San Francisco and New York, focuses on bridging the gap between business and design. The acquisition of Great Fridays added approximately 50 creative design professionals to the Company'sCompany’s headcount.
In connection with the Great Fridays acquisition, the Company agreed to issue a total of 90,864 shares of the Company common stock to the former owners of Great Fridays as consideration for future services (the “Great Fridays Closing Shares”). Furthermore, during the second quarter of 2015, subject to attainment of specified performance targets, the Company will payissued to the former owners of Great Fridays up to a maximum of 10,092 shares of the Company common stock (collectively with Great Fridays Closing Shares, the “GF Employment Shares”). The GF Employment Shares will vest in equal annual installments over a three-year period starting from the date of acquisition. With respect to each former owner, all unvested shares will be forfeited upon either termination of services by the Company for cause or by the employee other than for good reason. The aggregate fair value of the GF Employment Shares at the date of grant was $4,823 and will be recorded as stock-based compensation expense over an associated service period of three years (Note 14)13). Under the terms of the agreement, a total of 28,390 of the GF Employment Shares were placed into an escrow account for a period of 24 months as security for the indemnification obligations of the sellers under the asset purchase agreement.

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The following is a summary of the preliminary estimated fair values of the net assets acquired at the date of each respective acquisition during the year ended December 31, 2014 as originally reported in the quarterly condensed consolidated financial statements and at December 31, 2014:
2015:
Netsoft Jointech GGA Great Fridays TotalNetsoft Jointech GGA Great Fridays Total
At Originally Reported At December 31, 2014 As Originally Reported At December 31, 2014 As Originally Reported At December 31, 2014 At December 31, 2014 As Originally Reported At December 31, 2014At Originally Reported Final as of March 31, 2015 As Originally Reported Final as of June 30, 2015 As Originally Reported Final as of June 30, 2015 As Originally Reported Final as of December 31, 2015 As Originally Reported Final as of December 31, 2015
Cash and cash equivalents$
 $
 $871
 $871
 $
 $
 $259
 $1,130
 $1,130
$
 $
 $871
 $871
 $
 $
 $259
 $259
 $1,130
 $1,130
Trade receivables and other current assets788
 788
 784
 784
 5,157
 5,471
 1,825
 8,554
 8,868
788
 788
 784
 784
 5,157
 5,377
 1,825
 1,825
 8,554
 8,774
Property and equipment and other long-term assets52
 52
 338
 338
 444
 444
 262
 1,096
 1,096
52
 52
 338
 338
 444
 306
 262
 262
 1,096
 958
Deferred tax asset351
 
 
 
 4,463
 
 
 4,814
 
351
 
 
 
 4,463
 
 
 
 4,814
 
Acquired intangible assets1,700
 1,700
 25,744
 22,485
 10,959
 10,959
 5,747
 44,150
 40,891
1,700
 1,700
 25,744
 15,312
 10,959
 16,000
 5,747
 200
 44,150
 33,212
Goodwill2,776
 2,749
 11,033
 17,404
 6,496
 12,115
 6,947
 27,252
 39,215
2,776
 2,779
 11,033
 23,758
 6,496
 7,306
 6,947
 11,262
 27,252
 45,105
Total assets acquired5,667
 5,289
 38,770
 41,882
 27,519
 28,989
 15,040
 86,996
 91,200
5,667
 5,319
 38,770
 41,063
 27,519
 28,989
 15,040
 13,808
 86,996
 89,179
Accounts payable and accrued expenses69
 69
 728
 728
 2,593
 2,593
 872
 4,262
 4,262
69
 69
 728
 728
 2,593
 2,593
 872
 807
 4,262
 4,197
Deferred revenue
 
 
 
 
 104
 317
 317
 421

 
 
 
 
 104
 317
 317
 317
 421
Due to employees
 
 1,254
 1,254
 
 
 624
 1,878
 1,878

 
 1,254
 1,254
 
 
 624
 624
 1,878
 1,878
Deferred tax liability
 
 
 3,112
 
 
 1,200
 1,200
 4,312

 
 
 2,293
 
 
 1,200
 110
 1,200
 2,403
Total liabilities assumed69
 69
 1,982
 5,094
 2,593
 2,697
 3,013
 7,657
 10,873
69
 69
 1,982
 4,275
 2,593
 2,697
 3,013
 1,858
 7,657
 8,899
Net assets acquired$5,598
 $5,220
 $36,788
 $36,788
 $24,926
 $26,292
 $12,027
 $79,339
 $80,327
$5,598
 $5,250
 $36,788
 $36,788
 $24,926
 $26,292
 $12,027
 $11,950
 $79,339
 $80,280
The above estimatedAs of December 31, 2015 the fair values of the assets acquired and liabilities assumed are provisional and based on the information that was available as ofrelated purchase price allocation for the acquisition date and updated for any changes as2014 acquisitions have been finalized.
As of December 31, 2014. During2015, and during the year endedperiod since the date of each respective acquisition up through December 31, 2014,2015, or the followingdate purchase accounting was finalized, as applicable, the Company made updates were made to the initially reported acquired balances with someand has finalized valuation of the adjustments being reported in the third quarter between goodwillbalances of Netsoft, Jointech, GGA and deferred tax accounts.
Great Fridays. For Netsoft, the deferred tax asset and goodwill were adjusted and decreased the net assets acquired by $378.$348. For Jointech, intangible assets were adjusted to reflect the resultsfinal fair value of a preliminary valuation report obtainedintangible assets acquired and a deferred tax liability was established, both increasing goodwill with no change to the net assets acquired. For GGA, the final working capital adjustment was completed, deferred tax assets were netted with additional recognized deferred tax liabilities and additional accounts receivable and deferred revenue were recognized, deferred taxrecognized. In addition, intangible assets and property and equipment were netted with recognized deferred tax liabilities, andadjusted to reflect the final working capital adjustment was completed, whichfair value of the assets acquired. These adjustments resulted in aggregatean overall increase to goodwill and increased the net assets by $1,366. For Great Fridays, the value of the intangible assets and associated deferred tax liabilities were reduced based on the final fair value estimates of acquired intangible assets, which increased goodwill. These adjustments resulted in a decrease in net assets acquired by $1,366.$77.
The Company is gathering additional information necessary to finalize the estimated fair valuesadjustments identified above did not significantly impact our previously reported net income of intangible assets, deferred income taxes,prior periods and, other asset and liability amounts. The fair values reflected are subject to change. Such changes could be significant. The Company expects to finalize the valuation and complete the purchase price allocation as soon as practicable but no later than one year from the respective acquisition dates.such, prior period amounts have not been retrospectively adjusted.
The following table presents the estimated fair values and useful lives of intangible assets acquired during the year ended December 31, 2014:
Netsoft Jointech GGA Great FridaysNetsoft Jointech GGA Great Fridays
Weighted Average
Useful Life
(in years) 
 Amount  Weighted Average
Useful Life
(in years) 
 Amount  Weighted Average
Useful Life
(in years) 
 Amount  Weighted Average
Useful Life
(in years) 
 Amount Weighted Average
Useful Life
(in years) 
 Amount  Weighted Average
Useful Life
(in years) 
 Amount  Weighted Average
Useful Life
(in years) 
 Amount  Weighted Average
Useful Life
(in years) 
 Amount 
Customer relationships10
 $1,700
 10 $22,173
 10
 $10,959
 10
 $5,747
10
 $1,700
 10 $15,000
 10
 $16,000
 3
 $200
Trade names
 
 2 312
 
 
 
 

 
 2 312
 
 
 
 
Total  $1,700
   $22,485
   $10,959
   $5,747
  $1,700
   $15,312
   $16,000
   $200

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Table of Contents

The following is a summaryAs of revenues, net income and acquisition-related costs included in the consolidated statements of income and comprehensive income for the year ended December 31, 2014:
 For the Year Ended December 31, 2014
 Netsoft Jointech GGA Great Fridays Total
Revenues$5,068
  $13,060
  $19,809
  $1,821
  $39,758
Net Income806
1 

 (3,090)
2 

 822
3 

 (72)
4 

 (1,534)
Acquisition-related costs$75
  $361
  $325
  $24
  $785
(1)Included in net income is $252 of stock-based compensation expense related to the Netsoft Employment Shares for the year ended December 31, 2014.
(2)Included in net income is $1,738 of stock-based compensation expense related to the Jointech Employment Shares for the year ended December 31, 2014.
(3)Included in net income is $4,322 of stock-based compensation expense related to the GGA Employment Shares for the year ended December 31, 2014.
(4)Included in net income is $239 of stock-based compensation expense related to the Great Fridays Employment Shares for the year ended December 31, 2014.
Aggregate revenues generated by2015, the companies acquired companies forduring 2015 and 2014 have been significantly integrated into the year ended December 31, 2013, were approximately $46.5 million.Company and as such, it is not possible to precisely report their individual post-acquisition results of operations. Pro forma results of operations for the acquisition transactions wereare not presented because the effects of the acquisitions werewould not have been material to the Company’s consolidated results of operation,operations, individually or in the aggregate.aggregate for the periods presented.
3.GOODWILL AND INTANGIBLE ASSETS - NET
Goodwill by reportable segment was as follows:
North America Europe Russia TotalNorth America Europe Russia Total
Balance as of January 1, 2013$16,643
 $2,864
 $3,191
 $22,698
Net effect of foreign currency exchange rate changes(205) 
 (225) (430)
Balance as of December 31, 201316,438
 2,864
 2,966
 22,268
Balance as of January 1, 2014$16,438
 $2,864
 $2,966
 $22,268
Acquisition of Netsoft (Note 2)2,749
 
 
 2,749
2,749
 
 
 2,749
Acquisition of Jointech (Note 2)
 17,404
 
 17,404

 17,404
 
 17,404
Acquisition of GGA (Note 2)12,115
 
 
 12,115
12,115
 
 
 12,115
Acquisition of Great Fridays (Note 2)
 6,947
 
 6,947

 6,947
 
 6,947
Goodwill written-off
 
 (2,241) (2,241)
 
 (2,241) (2,241)
Net effect of foreign currency exchange rate changes(224) (876) (725) (1,825)(224) (876) (725) (1,825)
Balance as of December 31, 2014$31,078
 $26,339
 $
 $57,417
31,078
 26,339
 
 57,417
Acquisition of NavigationArts (Note 2)23,822
 
 
 23,822
Acquisition of AGS (Note 2)33,815
 
 
 33,815
Netsoft purchase accounting adjustment (Note 2)30
 
 
 30
Jointech purchase accounting adjustment (Note 2)
 6,181
 
 6,181
GGA purchase accounting adjustment (Note 2)(4,807) 
 
 (4,807)
Great Fridays purchase accounting adjustment (Note 2)
 4,315
 
 4,315
NavigationArts purchase accounting adjustment (Note 2)(2,058) 
 
 (2,058)
Effect of net foreign currency exchange rate changes(416) (2,369) 
 (2,785)
Balance as of December 31, 2015$81,464
 $34,466
 $
 $115,930
Excluded from the table above is the Other segment. As a result of an operating loss in the Other reporting unit for the three months ended June 30, 2011, the Company performed a goodwill impairment test. In assessing impairment in accordance with Accounting Standards Codification, (“ASC”) No. 350, “Intangibles-Goodwill and Other,” the Company determined that the fair value of the Other reporting unit, based on the total of the expected future discounted cash flows directly related to the reporting unit, was below the carrying value of the reporting unit. The Company completed the second step of the goodwill impairment test, resulting in an impairment charge of $1,697 in the Other operating segment. As of December 31, 2015, 2014 2013 and 20122013 the book value of the Other segment was $0.zero.
The Company performed an annual goodwill impairment test as of October 31, 2014 in accordance with Accounting Standards Codification, (“ASC”) No. 350, “Intangibles-Goodwill and Other.” In assessing impairment both qualitatively and quantitatively based on the total of the expected future discounted cash flows directly related to the reporting unit, the Company determined that the fair value of the Russia reporting unit was below the carrying value of the reporting unit. The Company completed the second step of the goodwill impairment test, resulting in an impairment charge of $2,241 as$2,241in the Russia segment. As of December 31, 2014.2015 and 2014 the book value of the Russia segment was zero. All existing assets that related to the Russia segment, excluding goodwill and including any unrecognized intangible assets, were assessed by management and deemed to not be impaired.

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There were no accumulated impairments losses in North America or Europe operating segments as of December 31, 2015, 2014 2013 or 2012.2013.
As part of the AGS acquisition in 2015, substantially all of the employees of AGS continued employment. The Company believes the amount of goodwill resulting from the allocation of purchase price to acquire AGS is attributable to the workforce of the acquired business. All of the goodwill was allocated to the Company’s U.S. operations and is presented within North America.

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As part of the NavigationArts acquisition in 2015, substantially all of the employees of NavigationArts continued employment. The Company believes the amount of goodwill resulting from the allocation of purchase price to acquire NavigationArts is attributable to the workforce of the acquired business. All of the goodwill was allocated to the Company’s U.S. operations and is presented within North America.
As part of the Netsoft acquisition in 2014, substantially all of the employees of Netsoft accepted employment with the Company. The Company believes the amount of goodwill resulting from the allocation of purchase price to acquire Netsoft is attributable to the workforce of the acquired business. All of the goodwill was allocated to the Company’s U.S. operations and is presented within North America.
As part of the Jointech acquisition in 2014, substantially all of the employees of Jointech continued employment. The Company believes the amount of goodwill resulting from the allocation of purchase price to acquire Jointech is attributable to the workforce of the acquired business. Based on the determination of the reportable units, Jointech has been placed in the Europe reportable unit based on managerial responsibility and consistent with segment reporting. All of the goodwill was allocated to the Company’s UK operations and is presented within Europe segment.
As part of the GGA acquisition in 2014, substantially all of the employees of GGA accepted employment with the Company. The Company believes the amount of goodwill resulting from the allocation of purchase price to acquire GGA is attributable to the workforce of the acquired business. All of the goodwill was allocated to the Company’s U.S. operations and is presented within North America.
As part of the Great Fridays acquisition in 2014, substantially all of the employees of Great Fridays continued employment. The Company believes the amount of goodwill resulting from the allocation of purchase price to acquire Great Fridays is attributable to the workforce of the acquired business. All of the goodwill was allocated to the Company’s U.S. operations and is presented within North America.
 2015
 Weighted average life at acquisition (in years) Gross carrying amount Accumulated amortization 
Net 
carrying amount
Client relationships10 $52,974
 $(8,387) $44,587
Trade name5 5,853
 (3,772) 2,081
Non-competition agreements4 746
 (554) 192
Total
 $59,573
 $(12,713) $46,860
 2014
 Weighted average life at acquisition (in years) Gross carrying amount Accumulated amortization 
Net 
carrying amount
Client relationships10 $48,482
 $(4,664) $43,818
Trade name5 6,372
 (2,894) 3,478
Non-competition agreements5 813
 (420) 393
Total  $55,667
 $(7,978) $47,689
 2013
 Weighted average life at acquisition (in years) Gross carrying amount Accumulated amortization 
Net 
carrying amount
Client relationships9 $13,432
 $(4,885) $8,547
Trade name5 6,232
 (1,643) 4,589
Non-competition agreements5 848
 (250) 598
Total  $20,512
 $(6,778) $13,734
 2012
 Weighted average life at acquisition (in years) Gross carrying amount Accumulated amortization 
Net 
carrying amount
Client relationships9 $13,724
 $(3,640) $10,084
Trade name5 6,372
 (439) 5,933
Non-competition agreements5 881
 (64) 817
Total  $20,977
 $(4,143) $16,834

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All of the intangible assets have finite lives and as such are subject to amortization. Recognized amortization expense for the years ended December 31 is presented in the table below:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Client relationships $3,843
 $1,373
 $627
 $3,961
 $3,843
 $1,373
Trade name 1,319
 1,222
 333
 1,280
 1,319
 1,222
Non-competition agreements 187
 190
 64
 175
 187
 190
Total $5,349
 $2,785
 $1,024
 $5,416
 $5,349
 $2,785

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Estimated amortization expenses of the Company’s existing intangible assets for the next five years ending December 31, were as follows:
 Amount Amount
2015 $6,520
2016 6,383
 $6,633
2017 5,957
 6,240
2018 5,032
 5,292
2019 4,748
 5,292
2020 5,292
Thereafter 19,049
 18,111
Total $47,689
 $46,860
4.PREPAID AND OTHER CURRENT ASSETS
Prepaid and other current assets consisted of the following:
 December 31,
2014
 December 31,
2013
 December 31,
2015
 December 31,
2014
Taxes receivable $3,966
 $7,295
 $7,954
 $3,966
Prepaid expenses 3,703
 3,399
 4,693
 3,703
Security deposits under operating leases 476
 1,005
Prepaid equipment 185
 986
Unamortized software licenses and subscriptions 454
 981
Due from employees 96
 218
Other 409
 471
 1,697
 1,620
Total $9,289
 $14,355
 $14,344
 $9,289
5.EMPLOYEE LOANS AND ALLOWANCE FOR LOAN LOSSES
In the third quarter of 2012, the Board of Directors of the Company approved the Employee Housing Program (the “Housing Program”), which assistsprovides employees in purchasingwith loans to purchase housing in Belarus in a form of a loan.Belarus. The housing is sold directly to employees by independent third parties. The Housing Program was designed to beas a retention mechanism for the Company’s employees in Belarus and is available to full-time qualified employees who have been with the Company for at least three years. The aggregate maximum lending limit of the program is $10,000, with no individual loans not exceeding $50. The housing is sold directly to employees by independent third parties. In addition to the housing loans, the Company issues relocation loans in connection with intra-company transfers, as well as certain other individual loans.
During the year ended December 31, 2014,2015, loans issued by the Company under the Housing Program were denominated in U.S. Dollars with a 5-year term and carried an interest rate of 7.5%.

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At December 31, 20142015 and December 31, 2013,2014, categories of employee loans included in the loan portfolio were as follows:
December 31,
2014
 December 31,
2013
December 31,
2015
 December 31,
2014
Housing loans$5,848
 $5,896
$5,654
 $5,848
Relocation and other loans667
 494
684
 667
Total employee loans6,515
 6,390
6,338
 6,515
Less: 
  
 
  
Allowance for loan losses
 

 
Total loans, net of allowance for loan losses$6,515
 $6,390
$6,338
 $6,515
During the years ended December 31, 2015 and 2014, the Company issued a total of $3,427 and $3,162 of loans to its employees, respectively, and received $3,547 and $3,025 in loan repayments during the same periods, respectively. One of the loans in the amount of $7 was written-off during the year ended December 31, 2015. There were no loans written-off during the year ended December 31, 2014.
There were no loans issued to principal officers, directors, or their affiliates during the years ended December 31, 2015, 2014 2013 and 2012.2013.

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On a quarterly basis, the Company reviews the aging of its loan portfolio to evaluate information aboutand evaluates the ability of employees to servicerepay their debt includingon schedule. Factors considered in the review include historical payment experience, reasons for payment delays and shortfalls, if any, as well as probability of collecting scheduled principal and interest payments based on the knowledge of individual borrowers, among other factors.
payments. As of December 31, 20142015 and December 31, 2013,2014, there were no material past due or non-accrual employee loans. The Company determined no allowance for loan losses was required regarding its employee loans as of December 31, 20142015 and December 31, 20132014 and there were no movements in provision for loan losses during the years ended December 31, 2015, 2014 2013 and 2012.2013.
6.RESTRICTED CASH AND TIME DEPOSITS
Restricted cash and time deposits consisted of the following:
 December 31,
2014
 December 31,
2013
Time deposits$
 $1,188
Short-term security deposits under customer contracts
 298
Long-term deposits under employee loan programs156
 225
Long-term deposits under operating leases
 
Total$156
 $1,711
 December 31,
2015
 December 31,
2014
Time deposits$30,181
 $
Other security deposits238
 156
Total$30,419
 $156
As of December 31, 2015, time deposits consisted of a bank deposit of $30,181, earning interest at the rate of 0.74% placed with the Cyprus entity’s bank in the United Kingdom The deposit will mature on March 11, 2016. There were no time deposits as of December 31, 2014.
Included in time deposits as of December 31, 2013, was a bank deposit of $1,188, which earned interest at the rate of 2.05%. The deposit matured on October 15, 2014.
At December 31, 20142015 and 2013 short-term2014, security deposits under customerlease contracts included fixedrepresented amounts placed in connection with bank guaranteesretained to secure appropriate performance by the Company. The Company estimates the probability of non-performance under these contracts as remote, therefore, no provision for losses has been recognized in respect of these amounts as of December 31, 20142015 and 2013.2014.
Also included inOther restricted cash as of December 31, 2015 and 2014 and 2013 wereincluded loan deposits of $156 and $225, respectively, placed in connection with certain employee loan programs (See Note 16)5).


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7.PROPERTY AND EQUIPMENT — NET
Property and equipment consisted of the following:
 
Useful Life
(in years)
 December 31,
2014
 December 31,
2013
 
Useful Life
(in years)
 December 31,
2015
 December 31,
2014
Computer hardware 3 $32,374
 $29,884
 3 $36,612
 $32,374
Leasehold improvements lease term 6,287
 5,903
 lease term 6,801
 6,287
Furniture and fixtures 7 7,348
 5,688
 7 8,990
 7,348
Purchased computer software 3 3,606
 5,042
 3 4,099
 3,606
Office equipment 7 5,043
 4,679
 7 8,307
 5,043
Building 50 17,123
 16,534
 50 34,002
 17,123
Construction in progress (Note 16) n/a 17,885
 15,749
Land improvements 20 1,464
 
Construction in progress (Note 15) n/a 
 17,885
 89,666
 83,479
 100,275
 89,666
Less accumulated depreciation and amortization (34,532) (30,164) (39,776) (34,532)
Total $55,134
 $53,315
 $60,499
 $55,134
Depreciation and amortization expense related to property and equipment was $11,979, $12,134 $12,335 and $9,858$12,335 for the years ended December 31, 2015, 2014 and 2013, and 2012, respectively.


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8.ACCRUED EXPENSES AND OTHER LIABILITIES
Accrued expenses consisted of the following:
 December 31,
2014
 December 31,
2013
 December 31,
2015
 December 31,
2014
Compensation $22,766
 $13,674
 $47,285
 $22,766
Acquisition related deferred consideration 1,022
 
Subcontractor costs 2,815
 2,933
 4,360
 2,815
Professional fees 1,162
 947
 2,251
 1,162
Facilities costs 757
 334
 1,538
 757
Acquisition related deferred consideration 603
 1,022
Other 3,681
 2,287
 4,347
 3,681
Total $32,203
 $20,175
 $60,384
 $32,203
9.TAXES PAYABLE
Current taxes payable consisted of the following:
 December 31,
2014
 December 31,
2013
 December 31,
2015
 December 31,
2014
Corporate profit tax $7,982
 $3,717
 $15,057
 $7,982
Value added taxes 6,279
 5,975
 8,553
 6,279
Payroll, social security, and other taxes 10,443
 4,479
 5,862
 10,443
Total $24,704
 $14,171
 $29,472
 $24,704
As of December 31, 2013, long-term taxes payable included amounts for unrecognized tax benefits and related interest. As of December 31, 2014, thereThere were no long-term taxes payable.payable as of December 31, 2015 and 2014.


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10.INCOME TAXES
Income before provision for income taxes shown below wasincluded income from domestic operations and income from foreign operations based on the geographic location to which such income was attributed as follows:
disclosed in the table below:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Income before income tax expense:            
Domestic $(7,229) $7,001
 $9,291
 $(7,687) $(7,229) $7,001
Foreign 94,182
 69,769
 56,572
 113,757
 94,182
 69,769
Total $86,953
 $76,770
 $65,863
 $106,070
 $86,953
 $76,770
The provision for income taxes consists of the following:
  For the Years Ended December 31,
  2014 2013 2012
Income tax expense (benefit) consists of:      
Current      
Federal $7,741
 $6,150
 $6,881
State 338
 310
 319
Foreign 12,504
 8,275
 7,969
Deferred      
Federal (3,979) (668) (625)
State (43) 14
 24
Foreign 751
 695
 (3,189)
Total $17,312
 $14,776
 $11,379
Deferred tax assets and liabilities are provided for the effects of temporary differences between the tax basis of an asset and liability and its reported amount in the consolidated balance sheets. These temporary differences result in taxable or deductible amounts in future years.
  For the Years Ended December 31,
  2015 2014 2013
Income tax expense (benefit) consists of:      
Current      
Federal $19,851
 $7,741
 $6,150
State 2,563
 338
 310
Foreign 14,528
 12,504
 8,275
Deferred      
Federal (13,361) (3,979) (668)
State (1,891) (43) 14
Foreign (76) 751
 695
Total $21,614
 $17,312
 $14,776

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TheDeferred Income Taxes
Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets and liabilities wereare as follows:
 December 31,
2014
 December 31,
2013
 December 31,
2015
 December 31,
2014
Deferred tax assets:        
Fixed assets $181
 $732
 $681
 $181
Intangible assets 3,789
 4,532
 1,428
 3,789
Accrued expenses 1,282
 3,488
 10,729
 1,282
Net operating loss carryforward 844
 
 5,233
 844
Deferred revenue 4,328
 2,050
 2,162
 4,328
Stock-based compensation 6,994
 407
 12,484
 6,994
Valuation allowance (149) 
 
 (149)
Restricted stock options 2
 1,336
 
 2
Other assets 30
 680
 14
 30
Deferred tax assets 17,301
 13,225
 32,731
 17,301
Deferred tax liabilities:        
Fixed assets 800
 804
 646
 800
Intangible assets 1,598
 
Accrued revenue and expenses 635
 846
 511
 635
Deferred inter-company gain 405
 405
 
 405
Equity compensation 7,013
 1,593
Stock-based compensation 1,672
 7,013
Other liabilities 24
 254
 912
 24
Deferred tax liability 8,877
 3,902
 5,339
 8,877
Net deferred tax asset $8,424
 $9,323
 $27,392
 $8,424
At December 31, 2015, the Company had current and non-current deferred tax assets of $11,847 and $18,312, respectively, and current and non-current tax liabilities of $365 and $2,402, respectively. At December 31, 2014, the Company had current and non-current deferred tax assets of $2,496 and $11,094, respectively, and current and non-current tax liabilities of $603 and $4,563, respectively. At December 31, 2013, the Company had current and non-current deferred tax assets of $5,392 and $4,557, respectively, and current and non-current tax liabilities of $275 and $351, respectively.
At December 31, 2014,2015, the Company has a net operating loss in China and Singapore related to the acquisition of Jointech. ThisJointech and a net operating loss in the US related to the acquisition of AGS. The net operating losses at Jointech will be utilized prior to its expiration and the net operating loss at AGS will be used each year until expiration. No provision has been made for U.S. or non-U.S. income taxes on the undistributed earnings of subsidiaries or for unrecognized deferred tax liabilities for temporary differences related to basis differences in investments in subsidiaries, as such earnings are expected to be permanently reinvested, the investments are essentially permanent in duration, or the Company has concluded that no additional tax liability will arise as a result of the distribution of such earnings. As of December 31, 2014,2015, certain subsidiaries had approximately $340.5$443.2 million of undistributed earnings that we intend to permanently reinvest. A liability could arise if our intention to permanently reinvest such earnings were to change and amounts are distributed by such subsidiaries or if such subsidiaries are ultimately disposed. It is not practicable to estimate the additional income taxes related to permanently reinvested earnings or the basis differences related to investments in subsidiaries.

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The provision for income taxes differs from the amountreconciliation of income tax determined by applying the applicable USfederal statutory federal income tax rate to pretaxour effective income tax rate is as follows:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Statutory federal tax $29,564
 $26,102
 $22,393
 $37,125
 $29,564
 $26,102
Increase/ (decrease) in taxes resulting from:            
State taxes, net of federal benefit 311
 368
 280
 341
 311
 368
Provision adjustment for current year uncertain tax position (1,220) 
 
 
 (1,220) 
Effect of permanent differences 8,589
 2,524
 2,177
 7,314
 8,589
 2,524
Stock-based compensation 3,782
 1,948
 1,165
 7,591
 3,782
 1,948
Rate differential between U.S. and foreign (24,772) (17,279) (14,472) (31,094) (24,772) (17,279)
Change in foreign tax rate 754
 (59) 148
 9
 754
 (59)
Change in valuation allowance 149
 489
 (489) 
 149
 489
Other 155
 683
 177
 328
 155
 683
Provision for income taxes $17,312
 $14,776
 $11,379
 $21,614
 $17,312
 $14,776
On September 22, 2005, the president of Belarus signed the decree “On the High-Technologies Park” (the “Decree”). The Decree is aimed at boosting the country’s high-technology sector. The Decree stipulates that member technology companies have a 100% exemption from Belarusian income tax of 18% effective July 1, 2006. The Decree is in effect for a period of 15 years from July 1, 2006.
The Company’s subsidiary in Hungary benefits from a tax credit of 10% of annual qualified salaries, taken over a 4-year period, for up to 70% of the total tax due for that period. The Company has been able to take the full 70% credit for 2008 - 2014. The Hungarian tax authorities repealed the tax credit beginning with 2012. However, credits earned in the years prior to 2012, will be allowed to be used through 2014. The Company has utilized the 70% limit through 2014.
The aggregate dollar benefits derived from thesethis tax holidaysholiday approximated $20.8 million, $16.8 million $9.7 million and $8.5$9.7 million for the years ended December 31, 2015, 2014 2013 and 2012,2013, respectively. The benefit the tax holiday had on diluted net income per share approximated $0.40, $0.34 $0.20 and $0.19$0.20 for the years ended December 31, 2015, 2014 and 2013, and 2012, respectively.
Uncertain Tax Positions
The liability for unrecognized tax benefits is included in income tax liability within the consolidated balance sheets at December 31, 20142015 and 2013.2014. At December 31, 20142015 and 2013,2014, the total amount of gross unrecognized tax benefits (excluding the federal benefit received from state tax positions) was $200$62 and $1,271,$200, respectively, (excluding penalties and interest of zero and $12 in 2015 and $189, respectively)2014). Of this total, $212$62 and $1,328,$212, respectively, (net of the federal benefit on state tax issues) represents the amount of unrecognized tax benefits that, if recognized, would favorably affect the effective tax rate in future periods.
The Company’s policy is to recognize interest and penalties related to uncertain tax positions as a component of its provision for income taxes. There was no accrued interest and penalties resulting from such unrecognized tax benefits at December 31, 2015. The total amount of accrued interest and penalties resulting from such unrecognized tax benefits was $12 $189 and $125$189 at December 31, 2014 2013 and 2012,2013, respectively.
The beginning to ending reconciliation of the gross unrecognized tax benefits were as follows:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Gross Balance at January 1 $1,271
 $1,271
 $1,271
Balance at January 1 $200
 $1,271
 $1,271
Increases in tax positions in current year 
 
 
 
 
 
Increases in tax positions in prior year 
 
 
 
 
 
Decreases due to settlement (1,071) 
 
 (138) (1,071) 
Balance at December 31 $200
 $1,271
 $1,271
 $62
 $200
 $1,271
There were no tax positions for which it was reasonably possible that unrecognized tax benefits will significantly increase or decrease within 12 months of the reporting date.

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The Company files income tax returns in the United States and in various states, local and foreign jurisdictions. The Company’s significant tax jurisdictions are the U.S. Federal, Pennsylvania, Canada, Russia, Denmark, Germany, Ukraine, the United Kingdom, Hungary, Switzerland and Kazakhstan. As a result of 20142015 acquisitions, the Company has an additional filing responsibility in Singapore, Hong Kong and China.India. The tax years subsequent to 20102011 remain open to examination by the Internal Revenue Service. Generally,Service and generally, the tax years subsequent to 20102011 remain open to examination by various state and local taxing authorities and various foreign taxing authorities.

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11.EMPLOYEE BENEFITS
The Company has establishedoffers employees a 401(k) retirement plan, which is a tax-qualified self-funded retirement plan covering substantially all of the Company’s U.S. employees. Under this plan, employees may elect to defer their current compensation by up to the statutory limit. Effective January 1, 2013,limit defined by the Internal Revenue Service. The Company provides discretionary matching contributions to the plan up to a maximum of 2.0% of the employee’s eligible compensation.compensation as defined by the plan. Employer contributions are subject to a two year vesting schedule. Employer contributions charged to expense for the years ended December 31, 2015 and 2014, were $740 and 2013, were $549, and $404, respectively.
The Company does not maintain any defined benefit pension plans or any nonqualified deferred compensation plans.
12.LONG-TERM DEBT
Revolving Line of Credit — On January 15, 2013,September 12, 2014, the Company entered into a revolving loan agreement (the “2013 Credit Facility”) with PNC Bank, National Association (the “Bank”). Under the agreement, the Company’s maximum borrowing capacity was set at $40,000. Advances under the 2013 Credit Facility accrued interest at an annual rate equal to the London Interbank Offer Rate, or LIBOR, plus 1.25%.
On September 12, 2014, the Company terminated the 2013 Credit Facility and entered into a new credit facility (the “2014 Credit Facility”) with PNC Bank, National Association; Santander Bank, N.A; and Silicon Valley Bank (collectively the “Lenders”). to replace its former revolving loan agreement. The 2014 Credit Facility provides for a borrowing capacity of $100,000, with potential to increase the credit facility up to $200,000 if certain conditions are met. The 2014 Credit Facility matures on September 12, 2019.
Borrowings under the 2014 Credit Facility may be denominated in U.S. dollars or, up to a maximum of $50,000 in British pounds sterling, Canadian dollars, euros or Swiss francs (or other currencies as may be approved by the lenders). Borrowings under the 2014 Credit Facility bear interest at either a base rate or Euro-rate plus a margin based on the Company’s leverage ratio. Base rate is equal to the highest of (a) the Federal Funds Open Rate, plus 0.5%, (b) the Prime Rate, and (c) the Daily LIBOR Rate, plus 1.0%.
The 2014 Credit Facility is secured by:collateralized with: (a) all tangible and intangible assets of the Company, and its U.S.-based subsidiaries including all accounts, general intangibles, intellectual property rights and equipment; and (b) all of the outstanding shares of capital stock and other equity interests in U.S.-based subsidiaries of the Company, and 65% of the outstanding shares of capital stock and other equity interests in certain of the Company’s foreign subsidiaries. The 2014 Credit Facility includes customary business and financial covenants and restricts the Company’s ability to make or pay dividends (other than certain intercompany dividends) unless no potential or actual event of default has occurred or would be triggered. As of December 31, 2015, the Company was in compliance with all covenants contained in the 2014 Credit Facility.
During the year ended December 31, 2015, the Company borrowed $35,000 denominated in U.S. dollars under the 2014 Credit Facility, with a LIBOR-based interest rate, which resets on a quarterly basis. As of December 31, 2015, the Company had outstanding debt of $35,000.
As of December 31, 2014,2015, the borrowing capacity of the Company under the 2014 Credit Facility was $100,000.
The 2014 Credit Facility contains customary affirmative and negative covenants, including financial and coverage ratios. As of December 31, 2014, the Company was in compliance with all debt covenants as of that date.
As of December 31, 2014, the Company had no outstanding debt under the 2014 Credit Facility.$65,000.
13.COMMON AND PREFERRED STOCK
On January 19, 2012, the Company effected an 8-for-1 stock split of the Company’s common stock, on which date the number of authorized common and preferred stock was increased to 160,000,000 and 40,000,000 shares, respectively. All shares of common stock, options to purchase common stock and per share information presented in the consolidated financial statements have been adjusted to reflect the stock split on a retroactive basis for all periods presented. There was no change in the par value of the Company’s common stock. The ratio by which the then outstanding shares of Series A-1 Preferred, Series A-2 Preferred and Series A-3 Preferred Stock were convertible into shares of common stock was adjusted to reflect the effects of the common stock split, such that each share of preferred stock was convertible into eight shares of common stock.
In February 2012, the Company completed an initial public offering of 6,900,000 shares of its common stock, which included 900,000 shares of common stock sold by the Company pursuant to an over-allotment option granted to the underwriters, which were sold at a price to the public of $12.00 per share. The offering commenced on February 7, 2012 and closed on February 13, 2012. Of the 6,900,000 shares of common stock sold, the Company issued and sold 2,900,000 shares of common stock and its selling stockholders sold 4,000,000 shares of common stock, resulting in gross proceeds to the Company

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of $34,800 and $28,969 in net proceeds after deducting underwriting discounts and commissions of $2,436 and offering expenses of $3,395. The Company did not receive any proceeds from the sale of common stock by the selling stockholders.
On August 20, 2010, the Company entered into an agreement with Instant Information Inc. to issue shares of common stock to Instant Information Inc. as consideration for the acquisition of the assets of Instant Information Inc. subject to achievement of certain financial milestones or upon completion of an initial public offering by the Company. A total of 53,336 shares of common stock were issued to Instant Information Inc. upon completion of the Company’s initial public offering for an aggregate value of $640, which was expensed during the first quarter of 2012.
Upon the closing of the initial public offering, all outstanding Series-A1 and Series-A2 convertible redeemable preferred stock, and Series A3 convertible preferred stock were converted into a total of 21,840,128 shares of common stock, as shown in the table below.
Conversion Shares 
Series A-1 Convertible Redeemable Preferred Stock16,439,480
Series A-2 Convertible Redeemable Preferred Stock3,078,432
Series A-3 Convertible Preferred Stock2,322,216
Total21,840,128
Series A-1 Convertible Redeemable Preferred Stock (“Series A-1 Preferred”) — On January 20, 2006, Siguler Guff LLC, a New York based private equity investment firm, acting through its affiliated investment funds Russia Partners II LP (“RPII”) and Russia Partners EPAM Fund LP (“RPE”), purchased 657,354 shares of Series A-1 Preferred at $12.17 per share or $8,000. At the same time, RPII and RPE also acquired 11,180,648 shares of the Company’s common stock from existing holders, and the Company enabled RPII and RPE to convert such shares into 1,397,581 shares of Series A-1 Preferred. The difference between the share price of the Series A-1 Preferred ($12.17 per share) and the common stock ($1.13 per share) exchanged of $6,803 has been recorded as a deemed dividend. The Company accreted the 12.5% compounded annual rate of return through April 15, 2010, in accordance with the redemption provision as detailed below. There was no accretion for the years ended December 31, 2014, 2013 and 2012. The ending redemption value was $41,245 at December 31, 2011.
The terms of the Series A-1 Preferred were as follows:
Dividends — No dividends will be paid on the Series A-1 Preferred unless dividends are paid on common stock.
Liquidation — Before any payment to the common stockholders, the Series A-1 Preferred will receive their purchase price of the Series A-1 Preferred ($12.17 per share) plus a 12.5% compounded annual rate of return on the purchase price.
If the assets distributable to the holders of the Series A Preferred upon a liquidation are insufficient to pay the full Series A-1, A-2 and A-3 Preferred liquidation amounts, then such assets or the proceeds shall be distributed among the holders of the Series A-1, A-2 and A-3 Preferred ratably in proportion to the respective amount to which they otherwise would be entitled.
The liquidation amount is equal to the carrying value for all periods presented.
Redemption — At any time after January 1, 2011, if the Company has not affected a qualified public offering, as defined, the holders of at least a majority of the then outstanding shares of Series A-1 Preferred, voting together as a separate class, may by written request, require the Company to redeem all or any number of shares of the Series A-1 Preferred in four equal semi-annual installments beginning thirty calendar days from the date of the redemption election and ending on the date one and one-half years after such date. The Company shall affect such redemptions on the applicable redemption date by paying in cash in exchange for each share of Series A-1 Preferred to be redeemed then outstanding an amount equal to the Series A-1 Preferred liquidation amount ($12.17 per share plus a 12.5% compounded annual rate of return) on such redemption date.
Pursuant to section 6.8 of the Series A-3 convertible preferred stock purchase agreement, the 12.5% compounded annual return related to the Series A-1 Preferred, which has been part of the Series A-1 liquidation amount, ceases after the date of issuance of the Series A-3 Preferred. EPAM terminated the accretion related to this liquidation amount on or about April 15, 2010.
Voting — Each holder of a share of Series A-1 Preferred shall be entitled to voting rights and powers equal to the voting rights and powers of the common stock (except as otherwise expressly provided or as required by law) voting together with the common stock as a single class on an as-converted to common stock basis. Each share of Series A-1 Preferred (including

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fractional shares) shall be entitled to one vote for each whole share of common stock that would be issuable upon conversion of such shares on the record date for determining eligibility to participate in the action being taken.
Conversion Rights — Any holder of Series A-1 Preferred may convert any share of Series A-1 Preferred held by such holder into a number of shares of common stock determined by dividing (i) the Series A-1 Preferred purchase price ($12.17 per share) by (ii) the Series A-1 conversion price then in effect. The initial conversion price for the Series A-1 Preferred (the “Series A-1 Conversion Price”) shall be equal to the purchase price ($12.17 per share). The Series A-1 Conversion Price from time to time in effect is subject to adjustment, as defined. Each share of Series A-1 Preferred shall automatically be converted into shares of common stock at the then effective applicable Series A-1 Conversion Price upon the earliest of (i) the date specified by vote or written consent or agreement of holders of at least a majority of the shares of Series A-1 Preferred then outstanding, (ii) effective immediately before a qualified public offering, as defined, or (iii) effective upon the closing of a liquidation or a reorganization event, as defined, that results in the receipt of a per share amount of cash proceeds or non-cash property valued equal to or greater than the Series A-1 Preferred liquidation amount, as defined.
Series A-2 Convertible Redeemable Preferred Stock (“Series A-2 Preferred”) — On February 19, 2008, the Company completed a private placement and raised net proceeds of $47,601 ($50,000 gross less $2,399 costs) from the sale of 675,081 shares of Series A-2 Preferred at a sale price of $74.07 per share. There was no annual accretion for the years ended December 31, 2014, 2013 and 2012. There was no ending carrying value at December 31, 2014, 2013 and 2012, respectively.
In connection with this private placement, the Company designated the Series A-2 Preferred as a new series of preferred stock and renamed the existing series of shares of Series A preferred stock as Series A-1 Preferred.
On January 19, 2010, the Company entered into a stock repurchase agreement with certain stockholders to repurchase 290,277 of Series A-2 Convertible Redeemable Preferred Stock at a per share price of $51.85 for a total consideration of $15,050. On November 10, 2010, Board of Directors of the Company voted to retire these shares.
The Series A-2 Preferred shares had the following rights and preferences:
Dividends — No dividends will be paid on the Series A-2 Preferred unless dividends are paid on common stock.
Liquidation — Before any payment to the common stockholders, the Series A-2 Preferred holders will receive their liquidation preference.
In the event of any liquidation that values 100% of the equity securities of the Company on a fully-diluted basis at an amount that is less than the Series A-2 post-money valuation, as defined, the holders of shares of Series A-2 Preferred shall be entitled to receive either their per share purchase price of the Series A-2 Preferred ($74.07) plus a 12.5% compounded annual rate of return if the purchase price is less than the percentage ceiling amount, defined for purposes of liquidation as 17.1% of cash proceeds or non-cash property received by the Company in the event of any liquidation, or the greater of (1) $74.07 per share and (2) the percentage ceiling amount.
In the event of liquidation that values 100% of the equity securities of the Company on a fully-diluted basis at an amount that is equal to or greater than the Series A-2 post-money valuation, as defined, the holders of shares of Series A-2 Preferred shall be entitled to receive either their per share purchase price of the Series A-2 Preferred ($74.07) plus a 12.5% to 18% compounded annual rate of return on the purchase price, if greater than the percentage ceiling amount, or the percentage ceiling amount.
If the assets distributable to the holders of the Series A Preferred upon a liquidation are insufficient to pay the full Series A-1, A-2 and A-3 Preferred liquidation amounts, then such assets or the proceeds shall be distributed among the holders of the Series A-1, A-2 and A-3 Preferred ratably in proportion to the respective amount to which they otherwise would be entitled.
Redemption — At any time before January 1, 2011, if the Company has not effected a qualified public offering, as defined, the holders of at least a majority of the then outstanding shares of Series A-2 Preferred, may, by written request, require the Company to redeem all or any number of shares of the Series A-2 Preferred in three equal installments payable no later than the 12th, 18th and 24th month following the date of the redemption election. The Company shall effect such redemptions on the applicable redemption date by paying in cash in exchange for each shares of Series A-2 Preferred to be redeemed then outstanding, a per share amount equal to the lesser of (x) an amount that would provide a compounded annual return of 12.5% from the date of initial issuance date and (y) the percentage ceiling amount. At any time on or after January 1, 2011, the redemption per share amount is equal to the lesser of (x) the hurdle amount, an amount that would provide an annual IRR, as defined, from the initial issuance date of such share of at least 17%, provided, however, that the hurdle amount, as defined, shall cease to compound after December 31, 2010 and (y) the percentage ceiling amount, as defined. The percentage ceiling amount means, initially, 17.1% and thereafter adjusted pro rata for any changes in the percentage of capital stock of the

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Company owned by the holders of shares of Series A-2 Preferred (on a fully diluted basis) multiplied by the aggregate value of all Common Stock (assuming conversion of the Series A Preferred) as reasonably determined by the Board in good faith.
Voting — Each holder of a Series A-2 Preferred shall be entitled to voting rights and powers equal to the voting rights and powers of common stock (except as otherwise expressly provided or as required by law) voting together with the common stock as a single class on an as-converted to common stock basis. Each share of Series A-2 Preferred (including fractional shares) shall be entitled to one vote for each whole share of common stock that would be issuable upon conversion of such shares on the record date for determining eligibility to participate in the action being taken.
Conversion rights — Any holder of Series A-2 Preferred may convert any share of Series A-2 Preferred held by such holder into a number of shares of common stock determined by dividing (i) the Series A-2 Preferred purchase price ($74.07 per share) by (ii) the Series A-2 conversion price then in effect. The initial conversion price for the Series A-2 Preferred (the “Series A-2 Conversion Price”) shall be equal to the purchase price ($74.07 per share). The Series A-2 Conversion Price from time in effect is subject to adjustment, as defined. Each share of Series A-2 Preferred shall automatically be converted into shares of common stock at the then effective applicable Series A-2 Conversion Price upon the earliest of (i) the date specified by vote or written consent or agreement of holders of at least a majority of the shares of Series A-2 Preferred then outstanding, (ii) effective immediately before a qualified public offering, as defined. or (iii) effective upon the closing of a liquidation or a reorganization event, as defined, that results in the receipt per share of amount of cash proceeds or non-cash property valued equal to or greater than, the lesser of (x) their purchase price of the Series A-2 Preferred ($74.07 per share) plus a 12.5% compounded annual rate of return on the purchase price and (y) the percentage ceiling amount, as defined.
Registration Rights — The holders of at least majority of the Series A-2 Preferred holders, may, by written request, require the Company to file a registration statement with certain limitations.
Series A-3 Convertible Preferred Stock (“Series A-3 Preferred”) — On April 15, 2010, the Company created and issued 290,277 shares of Series A-3 Preferred at $51.85 per share, for a total consideration of $14,971, net of costs.
The Series A-3 Preferred had the following rights and preferences:
Dividends — No dividends will be paid on the Series A-3 Preferred unless dividends are paid on common stock.
Liquidation — Before any payment to the common stockholders, the Series A-3 Preferred holders will receive their liquidation preference.
In the event of liquidation that values 100% of the equity securities of the Company on a fully-diluted basis at an amount that is equal to or greater than the Series A-3 liquidation amount, as defined, the holders of shares of Series A-3 Preferred shall be entitled to receive their pro rata portion based on the per share amount available to common stockholders.
If the assets distributable to the holders of the Series A Preferred upon a liquidation are insufficient to pay the full Series A-1, A-2 and A-3 Preferred liquidation amounts, then such assets or the proceeds shall be distributed among the holders of the Series A-1, A-2 and A-3 Preferred ratably in proportion to the respective amount to which they otherwise would be entitled.
The liquidation amount is equal to the carrying value for all periods presented.
Voting — Each holder of a Series A-3 Preferred shall be entitled to voting rights and powers equal to the voting rights and powers of common stock (except as otherwise expressly provided or as required by law) voting together with the common stock as a single class on an as-converted to common stock basis. Each share of Series A-3 Preferred (including fractional shares) shall be entitled to one vote for each whole share of common stock that would be issuable upon conversion of such shares on the record date for determining eligibility to participate in the action being taken.
Conversion rights — Any holder of Series A-3 Preferred may convert any share of Series A-3 Preferred held by such holder into a number of shares of common stock determined by dividing (i) the Series A-3 Preferred purchase price ($51.85 per share) by (ii) the Series A-3 conversion price then in effect. The initial conversion price for the Series A-3 Preferred (the “Series A-3 Conversion Price”) shall be equal to the purchase price ($51.85 per share). The Series A-3 Conversion Price from time in effect is subject to adjustment, as defined. Each share of Series A-3 Preferred shall automatically be converted into shares of common stock at the then effective applicable Series A-3 Conversion Price upon the earliest of (i) the date specified by vote or written consent or agreement of holders of at least a majority of the shares of Series A-3 Preferred then outstanding, (ii) effective immediately before a qualified public offering, as defined, or (iii) effective upon the closing of a liquidation or a reorganization event, as defined.
Registration Rights — The holders of at least a majority of the Series A-3 Preferred holders, may, by written request, require the Company to file a registration statement with certain limitations.

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Treasury Stock — During the years ended December 31, 2014 and 2012, the Company issued treasury stock in connection with acquisitions completed in 2014 and 2012 (See Note 2). During 2012, the Company retired 38,792 shares of its treasury stock.

14.STOCK-BASED COMPENSATION
The following costs related to the Company’s stock compensation plans were included in the consolidated statements of income and comprehensive income:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Cost of revenues $8,648
 $4,823
 $2,809
 $13,695
 $8,648
 $4,823
Selling, general and administrative expenses 15,972
 8,327
 4,017
Selling, general and administrative expenses - Acquisition related 18,690
 8,829
 4,417
Selling, general and administrative expenses - All other 13,448
 7,143
 3,910
Total $24,620
 $13,150
 $6,826
 $45,833
 $24,620
 $13,150
Equity Plans
During2015 Long-Term Incentive Plan— On June 11, 2015, the second quarterCompany’s stockholders approved the 2015 Long-Term Incentive Plan (“2015 Plan”) to be used to issue equity grants to company personnel. As of 2013,December 31, 2015, 6,657,370 shares of common stock remained available for issuance under the Company finalized2015 Plan. In addition, up to 6,277,028 shares that are subject to outstanding awards as of December 31, 2015 under the fair values2012 Plan and up to 1,039,861 shares that are subject to outstanding awards as of December 31, 2015 under the 2006 Plan and that expire or terminate for any reason prior to exercise or that would otherwise have returned to the respective Plan’s share pool under the terms of the net assets acquired from Empathy Lab. As a result, the Company issued an additional 1,483 shares of unvested (“restricted”) common stock to the sellers of Empathy Lab on July 11, 2013 to settle the difference between the initial number of shares issued upon acquisition and the total number of shares due in connection with this transaction. The shares vest 33.33% on each of the first, second and third anniversaries of the closing date. Upon termination of the recipient’s services with the Company with Cause or without Good Reason (in each case, as defined in the escrow agreement), any unvested sharesPlan, will be forfeited. The fair valueavailable for awards to be granted under the 2015 Plan.

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Table of the restricted shares at the time of grant was $42.Contents

2012 Non-Employee Directors Compensation Plan — On January 11, 2012, the Company approved the 2012 Non-Employee Directors Compensation Plan (“2012 Directors Plan”) to be used to issue equity grants to its non-employee directors. The Company authorized 600,000 shares of common stock to be reserved for issuance under the plan. As of December 31, 2015, 554,070 shares of common stock remained available for issuance under the 2012 Directors Plan. The 2012 Directors Plan will expire after 10 years and is administered by the Company’s Board of Directors.
2012 Long-Term Incentive Plan — On January 11, 2012, the Company approved the 2012 Long-Term Incentive Plan (“2012 Plan”) to be used to issue equity grants to company personnel. As of December 31, 2014, 4,785,761 shares of common stock remained available for issuance underIn June 2015, the 2012 Plan. This includes (i) any shares that were available for issuance underPlan was discontinued; however, outstanding awards remain subject to the 2006 Plan (as defined below) asterms of its discontinuance date and that became available for issuance under the 2012 Plan and (ii) any shares that were subject to outstanding awards under the 2006 Plan and have expired or terminated or were cancelled between the discontinuance date of the 2006 Plan and December 31, 2014 and therefore became available for issuance under the 2012 Plan. In addition, up to 1,743,034 shares that are subject to outstanding awards as of December 31, 2014an award that was previously granted under the 2012 or 2006 Plan and that expire or terminate for any reason prior to exercise or that would otherwise have returnedwill become available for issuance under the 2015 Plan. All of the options issued pursuant to the 2006 Plan’s share reserve under2012 Plan expire 10 years from the termsdate of the 2006 Plan will be available for awards to be granted under the 2012 Plan.grant.
2006 Stock Option Plan — Effective May 31, 2006, the Board of Directors of the Company adopted the 2006 Stock Option Plan (the “2006 Plan”). The 2006 Plan permitted the granting of options to directors, employees, and certain independent contractors. The Compensation Committee of the Board of Directors generally had the authority to select individuals who were to receive options and to specify the terms and conditions of each option so granted, including the number of shares covered by the option, the exercise price, vesting provisions, and the overall option term. In January 2012, the 2006 Plan was discontinued; however, outstanding awards remain subject to the terms of the 2006 Plan and any shares that are subject to an option award that was previously granted under the 2006 Plan and that will expire or terminate for any reason prior to exercise will become again available for issuance under the 20122015 Plan. All of the options issued pursuant to the 2006 Plan expire 10 years from the date of grant. All the outstanding shares under 2006 Plan will expire in January 2016.

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Stock Options
Stock option activity under the Company’s plans is set forth below:
Number of
Options 
 
Weighted Average
Exercise Price 
 
Aggregate
Intrinsic Value 
Number of
Options 
 
Weighted Average
Exercise Price 
 
Aggregate
Intrinsic Value 
Options outstanding at January 1, 20126,595,136
 $4.65
 $48,447
Options granted1,443,810
 16.80
 1,877
Options exercised(1,552,742) 3.53
 (22,623)
Options forfeited/cancelled(189,495) 11.35
 (1,279)
Options outstanding at December 31, 20126,296,709
 $7.51
 $66,682
Options outstanding at January 1, 20136,296,709
 $7.51
 $66,682
Options granted1,987,952
 23.60
 22,543
1,987,952
 23.60
 22,543
Options exercised(2,156,898) 4.31
 (66,066)(2,156,898) 4.31
 (66,066)
Options forfeited/cancelled(304,227) 11.50
 (7,131)(304,227) 11.50
 (7,131)
Options outstanding at December 31, 2013

5,823,536
 $13.99
 $122,003
5,823,536
 $13.99
 $122,003
Options granted2,400,500
 32.51
 36,584
2,400,500
 32.51
 36,584
Options exercised(1,171,097) 9.05
 (45,321)(1,171,097) 9.05
 (45,321)
Options forfeited/cancelled(214,193) 25.33
 (4,802)(214,193) 25.33
 (4,802)
Options outstanding at December 31, 20146,838,746
 $20.98
 $183,073
6,838,746
 $20.98
 $183,073
Options granted2,219,725
 62.18
 36,492
Options exercised(1,405,826) 14.70
 (89,860)
Options forfeited/cancelled(201,731) 34.48
 (8,904)
Options outstanding at December 31, 20157,450,914
 $34.07
 $331,938
          
Options vested and exercisable at December 31, 20142,406,016
 $9.83
 $91,236
Options vested and exercisable at December 31, 20152,446,226
 $15.95
 $153,305
Options expected to vest4,074,226
 $26.82
 $85,274
4,690,899
 $42.51
 $169,388
The fair value of each option award is estimated on the date of grant using the Black-Scholes option valuation model. The Company recognizes the fair value of each option as compensation expense ratably using the straight-line method over the service period (generally the vesting period). The Black-Scholes model incorporates the following assumptions:
a. Expected volatility — the Company estimated the volatility of its common stock at the date of grant using historical volatility of peer public companies for the year ended December 31, 2011. In order to compare volatilities for different interval lengths, the Company expresses volatility in annual terms. TheDuring 2014, the Company appliedbegan including the same approachhistorical volatility for the Company in conjunction with peer public companies to formulate the estimated volatility regarding the stock options issued in 20142015 and 2013 due to insufficiency of historical volatility data of its stock prices at the time of grant.2014. The expected volatility was 46%34.1% in the year ended December 31, 2015, and 45.9% in the years ended December 31, 2014 2013 and 2012.2013.

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b. Expected term — the Company estimates the expected term of options granted using the simplified method of determining expected term as outlined in SEC Staff Accounting Bulletin 107 as used for grants.the Company does not have sufficient history in order to develop a more precise estimate. The expected term was 6.25 years in 2015, 6.20 years in 2014, and 6.24 years in 2013, and 6.25 years in 2012.2013.
c. Risk-free interest rate — the Company estimates the risk-free interest rate using the U.S. Treasury yield curve for periods equal to the expected term of the options in effect at the time of grant. The risk-free rate was approximately 2.01%1.8%, 1.41%2.0% and 1.13%1.4% in 2015, 2014 2013 and 2012,2013, respectively.
d. Dividends — the Company uses an expected dividend yield of zero since it has never declared or paid any dividends on its common stock. The Company intends to retain any earnings to fund future growth and the operation of its business and, therefore, does not anticipate paying any cash dividends in the foreseeable future.
Additionally, the Company estimates forfeitures at the time of grantdetermines an annual forfeiture rate and revises those estimates in subsequent periods if actual forfeitures differ from those estimates. It uses a combination of historical data and other factors to estimate pre-vesting option forfeitures and recordrecords share-based compensation expense only for those awards that are expected to vest. The Company applies an estimated forfeiture rate at the time of grant and adjusts those estimated forfeitures to reflect actual forfeitures at least annually.
Aggregate grant-date fair value of stock options issued under the 2012 Plan during the year ended December 31, 20142015 was $33,004.$47,973. The options are typically scheduled to vest over four years from the time of grant.grant, subject to the terms of the applicable plan and stock option agreement. In general, in the event of the participant’s termination of service for any reason, unvested options are forfeited as of the date of such termination without any payment to the participant.
As of December 31, 2014,2015, a total of 1,5542,980 shares underlying options exercised through December 31, 2014,2015, were in transfer with the Company’s transfer agent.
As of December 31, 2014,2015, total remaining unrecognized compensation cost related to unvested stock options, net of forfeitures, was approximately $41,669,$64,816, and is expected to be recognized over a weighted-average period of 1.9 years.years. The

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weighted average remaining contractual term of the outstanding options as of December 31, 20142015 was 5.15.7 years for fully vested and exercisable options and 8.68.4 years for options expected to vest, respectively.
Other Awards
Other awards include awards of restricted stock and restricted stock units (“RSUs”) under the Company’s 2012 Directors Plan, andthe 2012 Plan as well as certain other individual awards.and the 2015 Plan, after its adoption. In addition, the Company has issued in the past, and may issue in the future issue its equity securities to compensate employees of acquired businesses for future services, uponservices. These issuances are on such terms and at such prices as itthe Company deems appropriate. Equity-based awards granted in connection with acquisitions of businesses are generally issued in the form of service-based awards dependent on continuing employment only and performance-based awards.awards, which are granted and vest only if certain specified performance conditions are met. The awards issued in connection with acquisitions of businesses are subject to the terms and conditions contained in the applicable award agreement and acquisition documents.

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Service-Based Awards
Summarized activity related to the Company’s service-based awards for the years ended December 31, 2015, 2014 2013 and 20122013 was as follows:
Number of
Shares 
 
Weighted Average Grant Date
Fair Value Per Share 
Number of
Shares 
 
Weighted Average Grant Date
Fair Value Per Share 
Unvested service-based awards outstanding at January 1, 2012
 $
Awards granted757,272
 17.15
Awards vested(97,400) 12.00
Unvested service-based awards outstanding at December 31, 2012659,872
 $17.92
Unvested service-based awards outstanding at January 1, 2013659,872
 $17.92
Awards granted15,524
 23.69
15,524
 23.69
Awards vested(330,468) 17.33
(330,468) 17.33
Unvested service-based awards outstanding at December 31, 2013344,928
 $18.74
344,928
 $18.74
Awards granted523,220
 40.41
523,220
 40.41
Awards vested(217,668) 17.84
(217,668) 17.84
Awards forfeited/cancelled(17,038) 21.14
(17,038) 21.14
Unvested service-based awards outstanding at December 31, 2014633,442
 $36.88
633,442
 $36.88
Awards granted113,614
 67.38
Awards vested(279,129) 33.66
Awards forfeited/cancelled(11,816) 34.47
Unvested service-based awards outstanding at December 31, 2015456,111
 $46.51
For the year ended December 31, 2014,2015, the Company issued a total of 7,7385,295 shares of unvested (“restricted”) common stock under its 2012 Non-Employee Directors Compensation Plan with an aggregate grant date fair value of $325.$375. As of December 31, 2014,2015, the aggregate unrecognized compensation expense related to unvested stock under the 2012 Directors Plan was $282.$262. This cost is expected to be recognized over the next 1.61.2 years using the weighted average method.
For the year ended December 31, 2014,2015, the Company issued a total of 70,50084,000 RSUs to certain key management personnel under the 2012 Plan.and 2015 Plans. The fair value of thethese RSUs at the time of the grants was $2,295.$5,492. As of December 31, 2014,2015, the aggregate unrecognized compensation expense for theseall outstanding service-based RSUs was $1,643.$5,691. This cost is expected to be recognized over the next 2.22.1 years using the weighted average method.
For the year ended December 31, 2014,2015, the Company granted a total of 444,98224,319 service-based awards in connection with the acquisitionsto certain key management personnel of businesses completedacquired during that period. The aggregate grant date fair value of the awards was $18,471. $1,789.
As of December 31, 2014, a2015, total of 545,379 shares underlyingunrecognized compensation cost related to unvested service-based awards with an aggregate fair value of $20,544 were unvested and outstanding in connection with the Company’s acquisitions activity. This costwas $11,090, which is expected to be recognized over the next 1.71.5 years using the weighted average method.
During the year ended December 31,Performance -Based Awards
In 2014, the Company initiated grantinggranted performance-based awards in connection with the acquisitions completed during that period. Totalyear. The total number of the awards varies based on attainment of certain performance targets pursuant to provisionsthe terms of the relevant purchase agreements.transaction documents. Typically, the performancevesting period is three years, with one third of the awards granted vesting on the first anniversary of the grant. The remaining awards vest in equal installments on the first, second and third anniversaries of the grant. If an eligible employee leaves the Company prior to a vesting date, the unvested portion of the award generally will be forfeited, generally.forfeited. The Company periodically evaluates the achievement of the related performance conditions during requisite servicethe applicable performance measurement period and the number of shares expected to be delivered, and resulting compensation expense is adjusted accordingly. During the year ended December 31, 2015, one-third of the performance-based awards issued in 2014 acquisitions, vested net of any forfeitures.

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Summarized activity related to the Company’s performance-based awards for the years ended December 31, 2014,2015, was as follows:
Number of Shares Weighted Average Grant Date Fair Value Per ShareNumber of Shares Weighted Average Grant Date Fair Value Per Share
Unvested performance-based awards outstanding at December 31, 2013
 $
Unvested performance-based awards outstanding at January 1, 2014
 $
Awards granted387,058
 38.18
Awards forfeited/cancelled(2,550) 36.57
Changes in the number of awards expected to be delivered(12,998) 5.47
Unvested performance-based awards outstanding at December 31, 2014371,510
 $39.34
Awards granted387,058
 38.18
14,000
 70.22
Awards vested
 
(117,749) 40.39
Awards forfeited/cancelled(2,550) 36.57
(1,360) 36.57
Changes in the number of awards expected to be delivered(12,998) 5.47
(19,105) 31.70
Unvested performance-based awards outstanding at December 31, 2014371,510
 $39.34
Unvested performance-based awards outstanding at December 31, 2015247,296
 $41.19
The aggregated grant date fair value of performance-based awards granted to certain key management personnel of businesses acquired during the year ended December 31, 2015 was $983.
As of December 31, 2014,2015, total unrecognized compensation cost related to unvested performance-based awards was $13,953.$12,679. That cost is expected to be recognized over the next 1.81.3 years using the weighted average method.
15.14.EARNINGS PER SHARE
Basic earnings per share ("EPS"(“EPS”) is computed by dividing the net income applicable to common stockholders for the period by the weighted average number of shares of common stock outstanding during the same period. Our Series A-1 Preferred, Series A-2 Preferred, Series A-3 Preferred, and restricted stock units were considered participating securities since these securities had non-forfeitable rights to dividends or dividend equivalents during the contractual period of the award and thus required the two-class method of computing EPS. When calculating diluted EPS, the numeratorDiluted earnings per share is computed by adding backdividing income available to common shareholders by the undistributed earnings allocated to the participating securities in arriving at the basic EPS and then reallocating such undistributed earnings among the company’sweighted-average number of shares of common stock participating securities andoutstanding during the potential common shares that result from the assumed exercise of all dilutive options. The denominator isperiod increased to include the number of additional shares of common sharesstock that would have been outstanding hadif the optionspotentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options, unvested restricted stock and unvested RSUs. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method.
The following table sets forth the computation of basic and diluted earnings per share of common stock as follows:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Numerator for common earnings per share:            
Net income $69,641
 $61,994
 $54,484
 $84,456
 $69,641
 $61,994
Net income allocated to participating securities 
 
 (3,341)
Numerator for basic earnings per share 69,641
 61,994
 51,143
Effect on income available from reallocation of options 
 
 261
Numerator for diluted earnings per share $69,641
 $61,994
 $51,404
Numerator for basic and diluted earnings per share $84,456
 $69,641
 $61,994
            
Denominator for basic earnings per share:  
  
    
  
  
Weighted average common shares outstanding 47,189
 45,754
 40,190
 48,721
 47,189
 45,754
Effect of dilutive securities:            
Stock options, RSUs and performance-based awards 2,545
 2,604
 3,631
 3,265
 2,545
 2,604
Denominator for diluted earnings per share 49,734
 48,358
 43,821
 51,986
 49,734
 48,358
            
Net income per share:  
  
    
  
  
Basic $1.48
 $1.35
 $1.27
 $1.73
 $1.48
 $1.35
Diluted $1.40
 $1.28
 $1.17
 $1.62
 $1.40
 $1.28
For the years ended December 31, 2015, 2014 2013 and 20122013 a total of 2,2601,637, 1,0802,260 and 1,5341,080 shares underlying equity-based awards, respectively, were outstanding but were not included in the computation of diluted earnings per share because the effect was anti-dilutive.

16.COMMITMENTS AND CONTINGENCIES

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15.COMMITMENTS AND CONTINGENCIES
The Company leases office space under operating leases, which expire at various dates through 2019.dates. Certain leases contain renewal provisions and generally require the Company to pay utilities, insurance, taxes, and other operating expenses. Rent expense under operating lease agreements for the years ended December 31, 2015, 2014 and 2013 was $20,065, $18,200, and 2012 was $18,200, $15,664 and $11,594 respectively. Future minimum rental payments under operating leases that have initial or remaining lease terms in excess of one year as of December 31, 20142015 were as follows:
Year Ending December 31, Operating Leases Operating Leases
2015 $16,718
2016 10,482
 $17,606
2017 7,668
 13,670
2018 4,993
 9,730
2019 3,589
 4,657
2020 1,289
Thereafter 952
 2,664
Total minimum lease payments $44,402
 $49,616
Construction in progress — On December 7, 2011, the Company entered into an agreement with IDEAB Project Eesti AS (“IDEAB”) for the construction of an office building within the High Technologies Park in Minsk, Belarus (the “Construction Agreement”). At the same time, the Company entered into a related investment agreement with the Minsk Executive Committee acting on behalf of the Republic of Belarus (the “Investment Agreement”) permitting the Company to use land located in the government’s High Technologies Park to construct the new office building and granting certain tax benefits. The Investment Agreement specified a completion deadline for construction of September 15, 2012 extended by the parties to December 31, 2014, the Company is negotiating a further extension to July 1, 2015. Per the Investment Agreement, if the Company does not meet the completion deadline, monthly penalties may be imposed; the most recent extension of the Investment Agreement increases the monthly penalty to $20 per month for the period beginning January 1, 2015. There may be further terms and conditions imposed on the Company in a further extension of the Investment Agreement. If the Investment Agreement is terminated, the Company could be required to disgorge certain tax benefits received by the Company in connection with the project and could potentially be required to fully restore the land to its original condition. The Company has not been required to pay any penalties to date. The Company has secured the required building construction permits and is working toward completion of the building. The Company believes that the building will be completed and available for its use in 2015, and that any penalties or loss of tax benefits will not be material to the accompanying financial statements.
The Construction Agreement committed IDEAB to construct an office building for the Company in Minsk with a committed completion date of February 28, 2014. In April 2014, IDEAB stopped its construction before the building’s completion, for reasons unrelated to the Company’s performance under the Construction Agreement. In May 2014, IDEAB notified the Company that it was unable to continue as general contractor to complete the construction of the building in time and on the terms agreed. As a result, the Company took control over the construction site. On July 7, 2014, the Company provided IDEAB with notice of termination of the Construction Agreement, effective on or about July 11, 2014. The Company filed a legal action against IDEAB in Belarus in August 2014, claiming breach of contract. In September 2014, the court decided in the Company’s favor and directed IDEAB to pay the Company $1,000 plus reimbursement of certain expenses. The Company is pursuing recovery from IDEAB of this amount. The Company has filed other lawsuits seeking recovery from IDEAB of additional amounts (including future work and construction materials) from IDEAB. These lawsuits are in various stages of litigation and it is not possible to estimate the likelihood of recovery.
AtThe Investment Agreement specified a completion deadline for construction of September 15, 2012 extended by the parties to December 31, 2014, and further extended to October 1, 2015. As of September 30, 2015, the Company had completed the building and began depreciating approximately $17,885$22,714 of capitalized construction costs and estimated up to $8.2 million of additional investment required to complete the construction and put the building into operation. The Company estimates that the building construction will be completed by June 30, 2015. In addition, up to $4,500 of advance payments issued to IDEAB for future work and construction materials under the Construction Agreement may not be recoverable. As of December 31, 2014, the Company estimated the amount of probable losses under the Construction Agreement at $2,593. These costs were recorded within the Company’s consolidated income from operations during the year ended December 31, 2014.
Based on the information known to the Company at this time, any additional liability related to this matter is not reasonably estimable.costs.
Indemnification Obligations  In the normal course of business, the Company is a party to a variety of agreements under which it may be obligated to indemnify the other party for certain matters. These obligations typically arise in contracts where the Company customarily agrees to hold the other party harmless against losses arising from a breach of representations

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or covenants for certain matters such as title to assets and intellectual property rights associated with certain arrangements. The duration of these indemnifications varies, and in certain cases, is indefinite.
The Company is unable to reasonably estimate the maximum potential amount of future payments under these or similar agreements due to the unique facts and circumstances of each agreement and the fact that certain indemnifications provide for no limitation to the maximum potential future payments under the indemnification. Management is not aware of any such matters that historically had or would have a material effect on the financial statements of the Company.
Litigation — From time to time, the Company is involved in litigation, claims or other contingencies. Management is not aware of any such matters that would have a material effect on the consolidated financial statements of the Company.
17.16.FAIR VALUE MEASUREMENTS
As required by the guidance for fair value measurements, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Thus, assets and liabilities categorized as Level 3 may be measured at fair value using inputs that are observable (Levels 1 and 2) and

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unobservable (Level 3). Significant unobservable inputs used in the fair value measurement of contingent consideration related to business acquisitions are forecasts of expected future operating results of those businesses as developed by the Company’s management and the probability of achievement of those operating forecasts. Management’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of assets and liabilities and their placement within the fair value hierarchy levels.
The following table represents the Company’s fair value hierarchy for its financial assets as of December 31, 2014 and 2013.
  As of December 2014
  Balance Level 1  Level 2  Level 3 
Cash and cash equivalents $220,534
 $220,534
 $
 $
Time deposits and restricted cash 156
 
 156
 
Employee loans 6,515
 
 
 6,515
Total assets measured at fair value on recurring basis $227,205
 $220,534
 $156
 $6,515
  As of December 2013
  Balance Level 1  Level 2  Level 3 
Cash and cash equivalents $169,207
 $169,207
 $
 $
Time deposits and restricted cash 1,711
 
 1,711
 
Employee loans 6,390
 
 
 6,390
Total assets measured at fair value on recurring basis $177,308
 $169,207
 $1,711
 $6,390
During the years ended December 31, 20142015 and 2013, the Company issued a total of $3,162 and $8,963 of loans to its employees, respectively, and received $3,025 and $3,088 in loan repayments during the same periods, respectively.
During the years ended December 31, 2014, and 2013, there were no transfers amongstamong Level 1, Level 2, or Level 3 classified financial assets and liabilities. Changes in the values of these financial liabilities, if any, are typically recorded within selling, general and administrative expenses line on the Company’s consolidated statements of income and comprehensive income.
The following table tables show the fair values of the Company’s financial assets and liabilities measured at fair value on a recurring basis:
 As of December 31, 2014
 Balance Level 3
Contingent consideration$37,400
 $37,400
Performance-based equity awards3,223
 3,223
Total liabilities measured at fair value on a recurring basis$40,623
 $40,623
There were no liabilities measured at fair value on a recurring basis as of December 31, 2013.2015 and 2014:

  As of December 2015
  Balance Level 1 Level 2 Level 3
Cash and cash equivalents 199,449
 199,449
 
 
Time deposits and restricted cash 30,419
 
 30,419
 
Employee loans 6,338
 
 
 6,338
Total assets measured at fair value $236,206
 $199,449
 $30,419
 $6,338
         
Contingent consideration 
 
 
 
Performance-based equity awards 5,364
 
 
 5,364
Total liabilities measured at fair value $5,364
 $
 $
 $5,364
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  As of December 2014
  Balance Level 1 Level 2 Level 3
Cash and cash equivalents 220,534
 220,534
 
 
Time deposits and restricted cash 156
 
 156
 
Employee loans 6,515
 
 
 6,515
Total assets measured at fair value $227,205
 $220,534
 $156
 $6,515
         
Contingent consideration 37,400
 
 
 37,400
Performance-based equity awards 3,223
 
 
 3,223
Total liabilities measured at fair value $40,623
 $
 $
 $40,623
TableThe Company classifies its contingent considerations within Level 3 as those inputs are specific to a given consideration and are not observable in the market. The housing loans are measured at the time of Contentsissuance using the Level 3 inputs within the fair value hierarchy because they are valued using significant unobservable inputs. Company issued short-term, non-interest bearing relocation and other loans to employees have a short term and high certainty of repayment, therefore, their carrying amount is a reasonable estimate of their fair value.
The Company analyzes the rate of return that market participants in Belarus would require when investing in unsecured U.S. dollar-denominated government bonds with similar maturities (a “risk-free rate”) and evaluated a risk premium component to compensate the market participants for the credit and liquidity risks inherent in the loans’ cash flows. As of December 31, 2015 and December 31, 2014, the carrying values of outstanding employee loans and loans issued during those years approximated their fair values.

As of December 31, 2014, contingent consideration and performance-based equity awards included amounts payable in cash and stock in connection with the acquisitions of businesses completed in the year ended December 31, 2014 (Note 2)2).
Sensitivity As of December 31, 2015, the only financial liabilities related to Changes in Significant Unobservable Inputsacquisitions of businesses included performance-based equity awards.
The fair value of the contingent consideration, which is based on the present value of the expected future payments to be made to the sellers of the acquired businesses, in accordance withwas derived by analyzing the provisions outlined in the respective purchase agreements. In determining fair value, the Company considered a variety of factors, including third party valuation experts and future performance of the acquired businesses using financial projections developed by the Company and market risk assumptions that were derived for revenue growth and/or earnings before interest, tax, and depreciation and amortization (“EBITDA”). The Company estimated future payments using the earnout formula and performance targets specified in each purchase agreement and adjustedadjusting those estimatesamounts to reflect

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the ability of the acquired entities to achieve the stated targets. It then discountedThe measurement period related to the paymentscontingent consideration for each 2014 acquisition was complete as of June 30, 2015, therefore, the amount of total consideration to present value using the Company’s cost of debt for the cash component, and a risk-free rate for the stock component of the earnout for all of the Company’s 2014 acquisitions. Changes in financial projections, market risk assumptions for revenue growth and/or EBITDA, or the discount rates, would result in a change in the fair value of recorded contingent liabilities. In addition, inputs used in the valuation of the stock component of the earnout include term, stock price volatility, current stock price, and exercise price, with the Company current stock price factor being the inputbe paid is no longer subject to the most variation. A significant increase in the Company stock price, in isolation, would result in a significantly higher fair value measurement. As the Company’s common stock does not have sufficient trading history, volatility was determined by measuring the volatilitychange as of a representative group of its peers, in conjunction with the volatility of the Company’s available trading history.December 31, 2015.
A reconciliation of the beginning and ending balances of acquisition-related contractual contingent liabilities using significant unobservable inputs (Level 3) for the yearyears ended December 31, 2015 and 2014, , was as follows:
 Amount
Contractual contingent liabilities at January 1, 2014$
Acquisition date fair value of contractual contingent liabilities — Netsoft1,825
Acquisition date fair value of contractual contingent liabilities — Jointech20,000
Acquisition date fair value of contractual contingent liabilities — GGA11,400
Acquisition date fair value of contractual contingent liabilities — Great Fridays1,173
Liability-classified stock-based awards3,088
Changes in fair value of contractual contingent liabilities included in earnings2,059
Changes in fair value of contractual contingent liabilities recorded against goodwill1,366
Effect of net foreign currency exchange rate changes(288)
Contractual contingent liabilities at December 31, 2014$40,623
There were no transfers in or out of Level 3 from other levels in the fair value hierarchy during the years ended December 31, 2014 and 2013. Changes in the values of the financial liabilities, if any, are recorded within other expense (income) in operating income on the Company’s consolidated statements of income and comprehensive income.
  Amount
Contractual contingent liabilities at January 1, 2014 $
Acquisition date fair value of contractual contingent liabilities — Netsoft 1,825
Acquisition date fair value of contractual contingent liabilities — Jointech 20,000
Acquisition date fair value of contractual contingent liabilities — GGA 11,400
Acquisition date fair value of contractual contingent liabilities — Great Fridays 1,173
Liability-classified stock-based awards 3,088
Changes in fair value of contractual contingent liabilities included in earnings 2,059
Changes in fair value of contractual contingent liabilities recorded against goodwill 1,366
Effect of net foreign currency exchange rate changes (288)
Settlements of contractual contingent liabilities 
Contractual contingent liabilities at December 31, 2014 $40,623
Liability-classified stock-based awards 5,148
Changes in fair value of contractual contingent liabilities included in earnings 4,355
Changes in fair value of contractual contingent liabilities recorded against goodwill 
Effect of net foreign currency exchange rate changes 246
Settlements of contractual contingent liabilities (45,008)
Contractual contingent liabilities at December 31, 2015 $5,364
18.17.OPERATING SEGMENTS
    
The Company determines its operating segments and reports segment information in accordance with the management approach, which designates internal reporting used by management to make operating decisions and assess performance as the source of the Company’s reportable segments.
The Company manages its business primarily based on the geographic managerial responsibility for its client base. As managerial responsibility for a particular client relationship generally correlates with the client’s geographic location, there is a high degree of similarity between client locations and the geographic boundaries of the Company’s reportable segments. In some cases, managerial responsibility for a particular client is assigned to a management team in another region and is usually based on the strength of the relationship between client executives and particular members of EPAM’s senior management team. In such a case, the client’s activity would be reported through the management team’s reportable segment.
The Company’s reportable segments are North America, Europe, Russia and Other. The Company’s Chief Operating Decision Maker (“CODM”) evaluates performance and allocates resources based on the segment'ssegment’s revenues and operating profit. Segment operating profit is defined as income from operations before unallocated costs. Generally, operating expenses for each operating segment have similar characteristics and are subject to similar factors, pressures and challenges. Expenses included in segment operating profit consist principally of direct selling and delivery costs as well as an allocation of certain

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shared services expenses. Certain expenses, such as stock-based compensation are not allocated to specific segments, as management does not believe it is practical as these expenses are not directly attributable to any specific segment and consequently are not allocated to individual segments in internal management reports used by the CODM. Such expenses are separately disclosed as “unallocated” and adjusted only against the Company’s total income from operations.

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Revenues from external customers and segment operating profit, before unallocated expenses, for the North America, Europe, Russia and Other reportable segments were as follows:
 For the years ended December 31, For the years ended December 31,
 2014 2013 2012 2015 2014 2013
Total segment revenues:            
North America $374,509
 $284,636
 $197,271
 $471,603
 $374,509
 $284,636
Europe 299,279
 204,150
 168,913
 400,460
 299,279
 204,150
Russia 50,663
 55,764
 50,552
 37,992
 50,663
 55,764
Other 5,552
 10,493
 16,986
 4,911
 5,552
 10,493
Total segment revenues $730,003
 $555,043
 $433,722
 $914,966
 $730,003
 $555,043
Segment operating profit:            
North America $90,616
 $66,814
 $38,671
 $112,312
 $90,616
 $66,814
Europe 50,189
 34,573
 32,750
 68,717
 50,189
 34,573
Russia 7,034
 7,077
 9,049
 5,198
 7,034
 7,077
Other (3,220) 844
 6,985
 (94) (3,220) 844
Total segment operating profit $144,619
 $109,308
 $87,455
 $186,133
 $144,619
 $109,308
Intersegment transactions were excluded from the above on the basis that they are neither included into the measure of a segment’s profit and loss by the CODM, nor provided to the CODM on a regular basis.
During the year ended December 31, 2015 and 2014, revenues from one customer, UBS AG, were $130,605 and $97,872, respectively and accounted for more than 10% of total revenues. Revenue from this customer is reported in the Company’s Europe segment and includes reimbursable expenses. No customer accounted for over 10% of total revenues in 2013.
Trade accounts receivable and unbilled revenues are generally dispersed across our clients in proportion to their revenues. There were no customers individually exceeding 10% of our trade receivables billed as of December 31, 2014. As of December 31, 2014,2015, billed and unbilled trade receivables from one customer, UBS AG, individually exceeded 10% and accounted for 16.5%12.4% and 19.8% of our total billed and unbilled trade receivables, as of that date.respectively.

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Reconciliation of segment revenues and operating profit to consolidated income before provision for income taxes is presented below:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Total segment revenues $730,003
 $555,043
 $433,722
 $914,966
 $730,003
 $555,043
Unallocated revenue 24
 74
 77
Unallocated (revenue)/loss (838) 24
 74
Revenues $730,027
 $555,117
 $433,799
 $914,128
 $730,027
 $555,117
            
Total segment operating profit: $144,619
 $109,308
 $87,455
 $186,133
 $144,619
 $109,308
Unallocated amounts:            
Other revenues 24
 74
 77
Other (revenues)/loss (838) 24
 74
Stock-based compensation expense (24,620) (13,150) (6,826) (45,833) (24,620) (13,150)
Non-corporate taxes (6,882) (3,201) (2,346) (4,274) (6,882) (3,201)
Professional fees (5,312) (3,651) (2,850) (7,104) (5,312) (3,651)
Depreciation and amortization (7,988) (2,829) (1,100) (5,581) (7,988) (2,829)
Bank charges (1,049) (1,194) (1,136) (1,352) (1,049) (1,194)
Asset impairment (5,983) 
 
Stock charge 
 
 (640)
One-time charges (747) (5,983) 
Provision for bad debts 
 (36) 
 
 
 (36)
Other corporate expenses (6,626) (8,828) (6,628) (14,437) (6,626) (8,828)
Income from operations 86,183
 76,493
 66,006
 105,967
 86,183
 76,493
Interest and other income, net 4,769
 3,077
 1,941
 4,731
 4,769
 3,077
Change in fair value of contingent consideration (1,924) 
 
 
 (1,924) 
Foreign exchange loss (2,075) (2,800) (2,084) (4,628) (2,075) (2,800)
Income before provision for income taxes $86,953
 $76,770
 $65,863
 $106,070
 $86,953
 $76,770
Geographic Area Information
Long-lived assets include property and equipment, net of accumulated depreciation and amortization, and management has determined that it is not practical to allocate these assets by segment since such assets are used interchangeably among the segments. Geographical information about the Company’s long-lived assets based on physical location of the assets was as follows:
December 31,
2014
 December 31,
2013
December 31,
2015
 December 31,
2014
Belarus$41,652
 $38,697
$44,879
 $41,652
Ukraine4,392
 5,525
4,487
 4,392
Hungary2,773
 2,644
2,485
 2,773
Russia2,196
 3,414
2,084
 2,196
United States2,001
 2,217
1,969
 2,001
India1,099
 
Poland1,088
 747
Other2,120
 818
2,408
 1,373
Total$55,134
 $53,315
$60,499
 $55,134

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Information about the Company’s revenues by client location is as follows:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
United States $318,304
 $247,979
 $197,593
 $427,433
 $318,304
 $247,979
United Kingdom 141,366
 108,892
 98,346
 164,301
 141,366
 108,892
Switzerland 87,111
 51,941
 30,120
 111,353
 87,111
 51,941
Canada 57,643
 49,193
 33,759
Russia 48,945
 53,328
 47,507
 36,506
 48,945
 53,328
Canada 49,193
 33,759
 9,256
Germany 25,740
 20,261
 16,391
 36,089
 25,740
 20,261
China 13,445
 
 
Hong Kong 23,117
 13,445
 
Sweden 10,589
 7,892
 5,742
Netherlands 8,838
 7,719
 3,127
 9,989
 8,838
 7,719
Sweden 7,892
 5,742
 4,913
Belgium 7,916
 4,198
 
Ireland 5,437
 3,667
 291
Kazakhstan 5,238
 9,886
 11,352
 4,910
 5,238
 9,886
Other locations 15,545
 7,984
 8,777
 9,334
 7,680
 7,693
Reimbursable expenses and other revenues 8,410
 7,626
 6,417
 9,511
 8,410
 7,626
Revenues $730,027
 $555,117
 $433,799
 $914,128
 $730,027
 $555,117
Service Offering Information
Information about the Company’s revenues by service offering is as follows:
 For the Years Ended December 31, For the Years Ended December 31,
 2014 2013 2012 2015 2014 2013
Software development $504,590
 $374,426
 $290,139
 $644,732
 $504,590
 $374,426
Application testing services 140,363
 109,222
 85,849
 174,259
 140,363
 109,222
Application maintenance and support 58,840
 45,971
 36,056
 70,551
 58,840
 45,971
Infrastructure services 14,198
 14,433
 12,424
 11,311
 14,198
 14,433
Licensing 3,626
 3,439
 2,914
 3,764
 3,626
 3,439
Reimbursable expenses and other revenues 8,410
 7,626
 6,417
 9,511
 8,410
 7,626
Revenues $730,027
 $555,117
 $433,799
 $914,128
 $730,027
 $555,117



F-41F-39

Table of Contents

19.18.QUARTERLY FINANCIAL DATA (UNAUDITED)
Summarized quarterly results for the two years ended December 31, 20142015 and 20132014 were as follows:
 Three Months Ended  Three Months Ended 
2014 March 31  June 30  September 30  December 31  Full Year 
2015 March 31  June 30  September 30  December 31  Full Year 
Revenues $160,384
 $174,695
 $192,764
 $202,184
 $730,027
 $200,045
 $217,781
 $236,049
 $260,253
 $914,128
Operating expenses:   
        
   
        
Cost of revenues (exclusive of depreciation and amortization) 102,454
 110,102
 122,509
 121,465
 456,530
 125,887
 134,256
 148,479
 158,291
 566,913
Selling, general and administrative expenses 32,359
 38,671
 42,875
 49,761
 163,666
 46,938
 55,976
 55,431
 64,414
 222,759
Depreciation and amortization expense 3,689
 5,451
 5,510
 2,833
 17,483
 4,200
 3,903
 4,393
 4,899
 17,395
Goodwill impairment loss 
 
 
 2,241
 2,241
 
 
 
 
 
Other operating (income)/ expenses, net 25
 1,995
 35
 1,869
 3,924
Other operating (income)/expenses, net 200
 40
 (30) 884
 1,094
Income from operations 21,857
 18,476
 21,835
 24,015
 86,183
 22,820
 23,606
 27,776
 31,765
 105,967
Interest and other income, net 976
 1,164
 1,261
 1,368
 4,769
 1,158
 1,299
 865
 1,409
 4,731
Change in fair value of contingent consideration 
 
 
 (1,924) (1,924) 
 
 
 
 
Foreign exchange loss (1,241) (1,239) (718) 1,123
 (2,075)
Foreign exchange (loss)/income (5,754) (465) 32
 1,559
 (4,628)
Income before provision for income taxes 21,592
 18,401
 22,378
 24,582
 86,953
 18,224
 24,440
 28,673
 34,733
 106,070
Provision for income taxes 4,228
 3,587
 3,338
 6,159
 17,312
 3,510
 5,209
 5,800
 7,095
 21,614
Net income $17,364
 $14,814
 $19,040
 $18,423
 $69,641
 $14,714
 $19,231
 $22,873
 $27,638
 $84,456
Comprehensive income $13,787
 $17,708
 $10,780
 $7,115
 $49,390
 $11,984
 $22,905
 $14,532
 $21,939
 $71,360
Basic net income per share(1)
 $0.37
 $0.31
 $0.40
 $0.39
 $1.48
 $0.31
 $0.40
 $0.47
 $0.56
 $1.73
Diluted net income per share(1)
 $0.35
 $0.30
 $0.38
 $0.37
 $1.40
 $0.29
 $0.37
 $0.44
 $0.52
 $1.62
(1)Earnings per share amounts for each quarter may not necessarily total to the yearly earnings per share due to the weighting of shares outstanding on a quarterly and year to date basis.
 Three Months Ended  Three Months Ended 
2013 March 31  June 30  September 30  December 31  Full Year 
2014 March 31  June 30  September 30  December 31  Full Year 
Revenues $124,198
 $133,184
 $140,150
 $157,585
 $555,117
 $160,384
 $174,695
 $192,764
 $202,184
 $730,027
Operating expenses:  
        
  
        
Cost of revenues (exclusive of depreciation and amortization) 77,937
 83,547
 88,539
 97,627
 347,650
 102,454
 110,102
 122,509
 121,465
 456,530
Selling, general and administrative expenses 27,083
 28,541
 27,893
 32,980
 116,497
 32,359
 38,671
 42,875
 49,761
 163,666
Depreciation and amortization expense 3,617
 3,854
 3,906
 3,743
 15,120
 3,689
 5,451
 5,510
 2,833
 17,483
Goodwill impairment loss 
 
 
 
 
 
 
 
 2,241
 2,241
Other operating (income)/ expenses, net 25
 (293) (418) 43
 (643)
Other operating (income)/expenses, net 25
 1,995
 35
 1,869
 3,924
Income from operations 15,536
 17,535
 20,230
 23,192
 76,493
 21,857
 18,476
 21,835
 24,015
 86,183
Interest and other income, net 630
 769
 846
 832
 3,077
 976
 1,164
 1,261
 1,368
 4,769
Change in fair value of contingent consideration 
 
 
 
 
 
 
 
 (1,924) (1,924)
Foreign exchange loss (499) (869) (720) (712) (2,800)
Foreign exchange (loss)/income (1,241) (1,239) (718) 1,123
 (2,075)
Income before provision for income taxes 15,667
 17,435
 20,356
 23,312
 76,770
 21,592
 18,401
 22,378
 24,582
 86,953
Provision for income taxes 2,987
 3,317
 3,919
 4,553
 14,776
 4,228
 3,587
 3,338
 6,159
 17,312
Net income $12,680
 $14,118
 $16,437
 $18,759
 $61,994
 $17,364
 $14,814
 $19,040
 $18,423
 $69,641
Comprehensive income $10,337
 $13,073
 $19,412
 $18,361
 $61,183
 $13,787
 $17,708
 $10,780
 $7,115
 $49,390
Basic net income per share(1)
 $0.28
 $0.31
 $0.36
 $0.40
 $1.35
 $0.37
 $0.31
 $0.40
 $0.39
 $1.48
Diluted net income per share(1)
 $0.27
 $0.29
 $0.34
 $0.38
 $1.28
 $0.35
 $0.30
 $0.38
 $0.37
 $1.40
(1)Earnings per share amounts for each quarter may not necessarily total to the yearly earnings per share due to the weighting of shares outstanding on a quarterly and year to date basis.

F-42F-40