10-K 1 idcc-20151231x10k.htm 10-K 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
Form 10-K
þ
 
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 
 
For the fiscal year ended December 31, 2015
 
 
OR
o
 
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 
 
For the transition period from          to          
Commission file number 1-33579
INTERDIGITAL, INC.
(Exact name of registrant as specified in its charter)
Pennsylvania
 
23-1882087
(State or other jurisdiction of incorporation or organization)
 
(IRS Employer Identification No.)
200 Bellevue Parkway, Suite 300
 Wilmington, Delaware
 
19809
(Zip Code)
(Address of principal executive offices)
 
 
Registrant’s telephone number, including area code (302) 281-3600
_____________________________________________
Securities registered pursuant to Section 12(b) of the Act:
Common Stock (par value $0.01 per share)
(title of class)
 
NASDAQ Stock Market LLC
(name of exchange on which registered)
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 þ    No o
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 o    No þ
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  þ  No o
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 (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes þ     No o
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405) 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. þ
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 þ
 
     Accelerated filer o
 
Non-accelerated filer o
 
Smaller reporting company o
 
 
 
 
(Do not check if a smaller reporting company)     
 
 
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes o  No þ
The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant’s most recently completed second fiscal quarter: $2,026,553,956 as of June 30, 2015.
The number of shares outstanding of the registrant’s common stock was 34,996,183 as of February 16, 2016.
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant's definitive proxy statement to be filed pursuant to Regulation 14A in connection with the registrant's 2016 annual meeting of shareholders are incorporated by reference into Items 10, 11, 12, 13 and 14 of Part III of this Form 10-K.



TABLE OF CONTENTS
 
Page
 
ITEM 4. MINE SAFETY DISCLOSURES
 
 
 
 
 
__________
In this Form 10-K, the words “we,” “our,” “us,” “the Company” and “InterDigital” refer to InterDigital, Inc. and/or its subsidiaries, individually and/or collectively, unless otherwise indicated or the context otherwise requires. InterDigital® is a registered trademark of InterDigital, Inc. All other trademarks, service marks and/or trade names appearing in this Form 10-K are the property of their respective holders.



2


PART I

Item 1.
BUSINESS.
Overview
InterDigital, Inc. ("InterDigital") designs and develops advanced technologies that enable and enhance wireless communications and capabilities. Since our founding in 1972, our engineers have designed and developed a wide range of innovations that are used in digital cellular and wireless products and networks, including 2G, 3G, 4G and IEEE 802-related products and networks. We are a leading contributor of intellectual property to the wireless communications industry.
Given our long history and focus on advanced research and development, InterDigital has one of the most significant patent portfolios in the wireless industry. As of December 31, 2015, InterDigital's wholly owned subsidiaries held a portfolio of approximately 20,400 patents and patent applications related to a range of technologies including the fundamental technologies that enable wireless communications. In that portfolio are a number of patents and patent applications that we believe are or may be essential or may become essential to cellular and other wireless standards, including 3G, 4G and the IEEE 802 suite of standards, as well as patent applications that we believe may become essential to 5G standards that are under development. That portfolio has largely been built through internal development, supplemented by joint development projects with other companies as well as select patent acquisitions. Products incorporating our patented inventions include: mobile devices, such as cellular phones, tablets, notebook computers and wireless personal digital assistants; wireless infrastructure equipment, such as base stations; and components, dongles and modules for wireless devices.
InterDigital derives revenues primarily from patent licensing and sales, with contributions from technology solutions licensing and sales and engineering services. In 2015, our total revenues were $441.4 million, an increase of $25.6 million compared to 2014. Our recurring revenues, consisting of current patent royalties and current technology solutions revenue, in 2015 were $372.8 million, an increase of $84.0 million compared to 2014. Additional information about our revenues, profits and assets, as well as additional financial data, is provided in the selected financial data in Part II, Item 6, and in the financial statements and accompanying Notes in Part II, Item 8, of this Form 10-K.
Our Strategy
Our objective is to continue to be a leading designer and developer of technology solutions and intellectual property for the mobile industry and to monetize those solutions and intellectual property through a combination of licensing, sales and other revenue opportunities.
To execute our strategy, we intend to:
Develop and source innovative technologies related to wireless. We intend to grow or maintain a leading position in advanced mobile technology, the Internet of Things (IoT) and other related technology areas by leveraging our expertise to guide internal research and development capabilities and direct our efforts in partnering with leading inventors and industry players to source new technologies.
Establish and grow our patent-based revenue. We intend to grow our licensing revenue base by adding licensees, expanding into adjacent technology areas that align with our intellectual property position and leveraging the continued growth of the overall mobile technology market. Those licensing efforts can be self-driven or executed in conjunction with licensing partnerships, trusts and other efforts, and may involve the vigorous defense of our intellectual property through litigation and other means. We also believe that our ongoing research efforts and associated patenting activities enable us to sell patent assets that are not vital to our core licensing programs, as well as to execute patent swaps that can strengthen our overall portfolio.
Pursue commercial opportunities for our advanced platforms and solutions.  We intend to pursue the commercialization of technology platforms and solutions that arise from our research efforts. As part of our ongoing research and development efforts, InterDigital often builds out entire functioning platforms in various technology areas. We seek to bring those technologies, as well as other technologies we may develop or acquire, to market through various methods including technology licensing, stand-alone commercial initiatives, joint ventures and partnerships.
Maintain a collaborative relationship with key industry players and worldwide standards bodies.   We intend to continue contributing to the ongoing process of defining mobile standards and other industry-wide efforts and incorporating our inventions into those technology areas. Those efforts, and the knowledge gained through them, support internal development efforts and also help guide technology and intellectual property sourcing through partners and other external sources.
Technology Research and Development

3


InterDigital pursues a diversified approach to sourcing the innovations that underpin our business. That approach incorporates internally driven research and development efforts by InterDigital Labs, as well as externally focused efforts by our Innovation Partners unit. Our efforts are guided by our vision of the future of mobile communications - Creating the Living NetworkTM - which is articulated around the variables of content, context and connectivity, and how the interplay of these elements drives future technology capabilities and needs.    
As of December 31, 2015, our patent portfolio consisted of close to 2,200 U.S. patents (approximately 210 of which were issued in 2015) and approximately 10,900 non-U.S. patents (approximately 1,300 of which were issued in 2015). As of the same date, we also had numerous patent applications pending worldwide, with close to 1,200 applications pending in the United States and approximately 6,100 pending non-U.S. applications. The patents and applications comprising our portfolio relate predominantly to digital wireless radiotelephony technology (including, without limitation, 3G and 4G technologies). Issued patents expire at differing times ranging from 2016 through 2034. We operate six research and development facilities in four countries: King of Prussia, PA; Melville, NY; San Diego, CA; Montreal, Canada; London, UK; and Seoul, South Korea.
InterDigital Labs    
As an early and ongoing participant in the digital wireless market, InterDigital developed pioneering solutions for the primary cellular air interface technologies in use today, TDMA and CDMA. That early involvement, our continued development of those advanced digital wireless technologies and innovations in OFDM/OFDMA and MIMO technologies have enabled us to create our significant worldwide portfolio of patents. In addition, InterDigital was among the first companies to participate in standardization and platform development efforts related to Machine-to-Machine (M2M) communications and IoT technology. In conjunction with our participation in certain standards bodies, we have filed declarations stating that we have patents that we believe are or may be essential or may become essential to cellular and other wireless standards and that, with respect to our essential patents, we are prepared to grant licenses on fair, reasonable and non-discriminatory terms or similar terms consistent with the requirements of the respective standards organizations.
Our capabilities in the development of advanced mobile technologies are based on the efforts of a highly specialized engineering team, leveraging leading-edge equipment and software platforms. As of December 31, 2015, InterDigital employed approximately 170 engineers, approximately 80% of whom hold advanced degrees (including 57 doctorate degrees). Over the last three years, investment in development has ranged from $64.7 million to $75.3 million, and the largest portion of this expense has been personnel costs. Additional information about our development expenses is provided in the results of operations, under the heading "Operating Expenses," in Part II, Item 7, of this Form 10-K.
Our current research efforts are focused on two main technology areas: cellular wireless technology and IoT technology.
Cellular Wireless Technology
We have a long history of developing cellular technologies, including those related to CDMA and TDMA and, more recently, OFDM/OFDMA and MIMO. A number of our inventions are being used in all 2G, 3G and 4G wireless networks and mobile terminal devices. We led the industry in establishing TDMA-based TIA/EIA/IS-54 as a U.S. digital wireless standard in the 1980s and developed a substantial portfolio of TDMA-based patented inventions. These inventions include or relate to fundamental elements of TDMA-based systems in use around the world. We have also developed and patented innovative CDMA and OFDM/OFDMA technology solutions and today, we hold a significant worldwide portfolio of patents and patent applications for these technologies. Similar to our TDMA inventions, we believe that a number of our CDMA and OFDM/OFDMA inventions are, may be or may become essential to the implementation of CDMA and OFDM/OFDMA-based systems in use today.
We also continue to be engaged in development efforts to build and enhance our technology portfolio in areas including LTE, LTE-Advanced, and emerging 5G technologies for 3GPP. Some of our LTE inventions include or relate to MIMO technologies for reducing interference and increasing data rates; power control; hybrid-ARQ for fast error correction; control channel structures for efficient signaling; multi-carrier operation; low-complexity devices; vehicular-centric communications (V2X); and other areas. We also continue to develop additional technologies in response to existing or perceived challenges of connectivity, many of them within the scope of our efforts to define future generations of wireless including 5G. These include air interface enhancements, policy-driven bandwidth management, cognitive radio and optimized data delivery. We are developing technologies that will enable efficient multimedia content delivery across heterogeneous devices and networks, and creating evolved system architectures that enable operation in small cells and additional frequency bands and improved cell-edge performance as well as device-to-device communications.
Our strong wireless background includes engineering and corporate development activities that focus on solutions that apply to other wireless market segments. These segments primarily fall within the continually expanding scope of the IEEE 802, IETF and ETSI standards. We are building a portfolio of technology related to Wi-Fi, WLAN, WMAN and WRAN that

4


includes, for example, improvements to the IEEE 802.11 PHY and MAC to increase peak data rates, the use of lower frequency bands for IoT and other new use cases such as TV-Whitespace (802.11af) and sub 1 GHz (802.11ah), and fast initial link setup (802.11ai) to enhance hotspot operation (WFA HOTSPOT 2.0).
IoT Technology
In the field of machine-to-machine (M2M) and IoT applications, we are developing technologies to enable seamless interconnection for multiple access types (cellular, WLAN, WPAN) and M2M service frameworks that can be managed by a customer and leveraged by a diverse set of vertical applications. These technologies build on our expertise in developing platforms and contributing technologies towards the advancement of global M2M and IoT standards. As part of, and in addition to, InterDigital’s standards-focused development, we have developed two solutions that are being made available commercially.
In 2015, we launched our oneMPOWER™ platform, which enables interoperability and scalability across diverse verticals, networks, and devices. InterDigital’s oneMPOWER platform is a secure and scalable horizontal platform that helps businesses launch and manage IoT data and applications. It features a comprehensive suite of application enabling services that span connectivity, device, data, security, and transaction management. Our oneMPOWER platform complies with oneM2M, the global standard for horizontal IoT platforms, and is designed for interoperability across diverse vertical markets, networks, and devices. The solution is based on an open standard with a long-term features roadmap, which interworks with many existing industry protocols and alliances.
The wot.ioTM data service exchangeTM for connected device platforms was launched in 2014.  The wot.io platform provides a common interface to multiple service providers, allowing companies to monetize IoT data in a simpler fashion via a real-time, low-latency service-oriented architecture.
Other Technology Areas and Sources
Because mobile technology today and into the future encompasses a very broad range of areas, we are also developing a range of technologies in the areas of video compression and delivery, security, analytics, and other areas. Some of those efforts are related to technology standards. In addition, to supplement our own development efforts, our Innovation Partners unit pursues an external sourcing model based around partnerships with leading inventors and research organizations, as well as the acquisition of technology and patent portfolios that align with InterDigital's roadmap. In 2015, in addition to existing relationships with VTT Technical Research Centre of Finland, BIO-key International Inc., McGill University and the Institute for Management Cybernetics (IfU), an elite private research institution in Germany, Innovation Partners added relationships with the Florida Institute for Human and Machine Cognition (IHMC) and igolgi, Inc., a provider of high-quality media transformation solutions.
Our Revenue Sources
Patent-Based Revenue
We believe that companies making, importing, using or selling products compliant with the standards covered by our patent portfolio, including all manufacturers of mobile handsets, tablets and other devices, require a license under our patents and will require licenses under patents that may issue from our pending patent applications. We have successfully entered into license agreements with many of the leading mobile communications companies globally, including Samsung Electronics Co., Ltd. ("Samsung"), Sony Corporation of America ("Sony"), Kyocera Corporation (“Kyocera”), HTC Corporation and BlackBerry Limited, among others.
Most of our patent license agreements are structured on a royalty-bearing basis, while others are structured on a paid-up basis or a combination thereof. Upon entering into a new patent license agreement, the licensee typically agrees to pay consideration for sales made prior to the effective date of the license agreement (i.e., past patent royalties) and also agrees to pay royalties or license fees on licensed products sold during the term of the agreement. We expect that, for the most part, new license agreements will follow this model. Almost all of our patent license agreements provide for the payment of royalties based on sales of licensed products designed to operate in accordance with particular standards (convenience-based licenses), as opposed to the payment of royalties if the manufacture, sale or use of the licensed product infringes one of our patents (infringement-based licenses).
In most cases, we recognize the revenue from per-unit royalties in the period when we receive royalty reports from licensees. In circumstances where we receive consideration for past patent royalties, we recognize such payments as revenue in the period in which the patent license agreement is signed. Some of these patent license agreements provide for the non-refundable prepayment of royalties that are usually made in exchange for prepayment discounts. As the licensee reports sales of covered products, the royalties are calculated and either applied against any prepayment or become payable in cash or other consideration. Additionally, royalties on sales of licensed products under the license agreement become payable or applied against prepayments based on the royalty formula applicable to the particular license agreement. These formulas include flat

5


dollar rates per unit, a percentage of sales, a percentage of sales with a per-unit cap and other similar measures. The formulas can also vary by other factors, including territory, covered standards, quantity and dates sold.
Some of our patent licenses are paid up, requiring no additional payments relating to designated sales under agreed upon conditions. Those conditions can include paid-up licenses for a period of time, for a class of products, for a number of products sold, under certain patents or patent claims, for sales in certain countries or a combination thereof. Licenses have become paid-up based on the payment of fixed amounts or after the payment of royalties for a term. With the exception of amounts allocated to past patent royalties, we recognize revenues related to fixed amounts on a straight-line basis. Our license agreements typically contain provisions that give us the right to audit our licensees' books and records to ensure compliance with the licensees' reporting and payment obligations under those agreements. From time to time, these audits reveal underreporting or underpayments under the applicable agreements. In such cases, we seek payment for the amount owed and enter into negotiations with the licensee to resolve the discrepancy.
In addition, in 2013, InterDigital formed the Signal Trust for Wireless Innovation (the "Signal Trust"). The goal of the Signal Trust is to monetize a large patent portfolio related to cellular infrastructure. More than 500 patents and patent applications were transferred from InterDigital to the Signal Trust, focusing primarily on 3G and LTE technologies and developed by InterDigital's engineers and researchers over more than a decade. A number of these innovations have been contributed to the worldwide standards process, resulting in a portfolio that includes patents for pioneering inventions that we believe are used pervasively in the cellular wireless industry. InterDigital is the primary beneficiary of the Signal Trust. The distributions from the Signal Trust will support continued research related to cellular wireless technologies. A small portion of the proceeds from the Signal Trust will be used to fund, through the Signal Foundation for Wireless Innovation, scholarly analysis of intellectual property rights and the technological, commercial and creative innovations they facilitate.
We also pursue, on occasion, targeted sales of portions of our patent portfolio. This strategy is based on the expectation that our portfolio and continued research efforts extend well beyond the requirements for a successful licensing program. In addition, the strategy leverages the desire from new entrants in the mobile technology space to build strong intellectual property positions to support their businesses.
Other Potential Revenue Sources
Our strong technology expertise and research and development team also form the basis for other potential revenue opportunities, focused around areas such as engineering services, research joint ventures and the continued development, commercialization and licensing of research and development projects that have progressed to a pre-commercial or commercial phase. We also currently recognize revenue from the licensing of technology that has been developed by our engineering teams and is integrated into other companies’ technology products.
In both its cellular wireless and IoT technology areas, we work to incubate and commercialize market-ready technologies. These include technologies that were developed as part of our standards development efforts, as well as technologies developed outside the scope of those efforts.
In certain cases where we have identified a potential commercial opportunity, we have chosen to establish a separate commercial initiative focused on the specific opportunity and developing commercial products to address the identified need. For example, in 2014, XCellAir, Inc. was established. The XCellAir™ product is a cloud-based, multi-vendor, multi-technology mobile network management and optimization solution that enables mobile network operators, mobile system operators and Internet service providers to manage, optimize and monetize heterogeneous network resources. Although this and similar initiatives are in their early stages, they are potential revenue sources for the Company.
In 2012, we formed of a joint venture with Sony called Convida Wireless. The joint venture combined InterDigital's advanced M2M research capabilities with Sony's consumer electronics expertise with the purpose of driving new research in IoT communications and other connectivity areas. In 2015, this joint venture was renewed, and its focus was expanded to include advanced research and development into 5G and future wireless technologies.
Wireless Communications Industry Overview
The wireless communications industry continues to experience rapid growth worldwide, as well as an expansion of device types entering the market. In smartphones alone, the market continues to see growth, with growth focused on higher-end 4G devices.

6


In addition, new markets are emerging related to wireless connectivity. IoT is an important new market in the technology field, which is expected to result in a significant increase in the number of connections, and unlock new business capabilities. IoT is currently in its earliest stages, and estimates vary broadly as far as how many connections it will yield. IHS estimates that the IoT market will grow an installed base of more than 70 billion connected devices by 2025, with total new device shipments reaching more than 20 billion yearly by 2025 and particularly high growth in the automotive, industrial and medical fields. Shipments of 3G, 4G and 802.11 IoT connected devices alone are expected to reach close to 6 billion by 2019.

7


To achieve economies of scale and support interoperability among different participants, products for the wireless industry have typically been designed to operate in accordance with certain standards. Wireless communications standards are formal guidelines for engineers, designers, manufacturers and service providers that regulate and define the use of the radio frequency spectrum in conjunction with providing detailed specifications for wireless communications products. A primary goal of the standards is to ensure interoperability of products marketed by multiple companies. A large number of international and regional wireless Standards Development Organizations (“SDOs”), including the ITU, ETSI, TIA (USA), IEEE, ATIS (USA),

8


TTA (Korea), ARIB (Japan) and ANSI, have responsibility for the development and administration of wireless communications standards. New standards are typically adopted with each new generation of products, are often compatible with previous generations and are defined to ensure equipment interoperability and regulatory compliance.
Standards have evolved in response to consumer demand for services and expanded capabilities of mobile devices. Cellular standards have evolved from voice-oriented services to multimedia services that exploit the higher speeds offered by newer technologies, such as LTE. The wireless communications industry has also made significant advances in non-cellular wireless technologies. In particular, IEEE 802.11 WLAN has gained momentum in recent years as a wireless broadband solution in the home, office and select public areas.
SDOs typically ask participating companies to declare formally whether they believe they hold patents or patent applications essential to a particular standard and whether they are willing to license those patents on either a royalty-bearing basis on fair, reasonable and nondiscriminatory terms or on a royalty-free basis. To manufacture, have made, sell, offer to sell or use such products on a non-infringing basis, a manufacturer or other entity doing so must first obtain a license from the holder of essential patent rights. The SDOs do not have enforcement authority against entities that fail to obtain required licenses, nor do they have the ability to protect the intellectual property rights of holders of essential patents.
InterDigital often publicly characterizes aspects of its business, including license agreements and development projects, as pertaining to broad mobile industry standards such as, for example, 3G, 4G and Wi-Fi. In doing this, we generally rely on the positions of the applicable standards-setting organizations in defining the relevant standards. However, the definitions may evolve or change over time, including after we have characterized certain transactions.
Business Activities
2015 Patent Licensing Activity
During third quarter 2015, we entered into a new patent license agreement with Sony (the "new Sony PLA"). In addition, we renewed our joint venture with Sony, Convida Wireless, to continue investments in the development of IoT technologies and expanded it to include development efforts in 5G technologies. The new Sony PLA covers the sale by Sony of covered products for the three-year period that commenced on December 1, 2015. In addition, the new Sony PLA covers Sony's covered product sales that occurred during certain prior periods and that were not covered under our prior agreement with Sony.
During fourth quarter 2015, we entered into a new worldwide, non-exclusive, royalty bearing patent license agreement with Kyocera. The agreement covers Kyocera's sale of certain cellular terminal unit products.
Customers Generating Revenues Exceeding 10% of Total 2015 Revenues
Pegatron Corporation ("Pegatron"), Samsung and Sony comprised approximately 31%, 16% and 14% of our total 2015 revenues, respectively.    
In 2008, we entered into a patent license agreement with Pegatron (the “2008 Pegatron PLA”) that covers Pegatron and its affiliates. Under the terms of the 2008 Pegatron PLA, we granted Pegatron a non-exclusive, non-transferable, world-wide royalty-bearing license covering the sale of certain products designed to operate in accordance with 2G and 3G wireless standards ("Licensed Products"). In second quarter and fourth quarter 2013, we received arbitration awards in separate proceedings we initiated against Pegatron and Apple, respectively.  Taken together, these arbitration awards clarified that Pegatron owes us royalties on certain products it produces for Apple.  The Pegatron arbitration award confirmed that, to the extent that Pegatron manufactures Licensed Products for Apple that are not licensed under our 2007 patent license agreement with Apple (the "2007 Apple PLA"), those products are covered by the 2008 Pegatron PLA and are royalty bearing under that agreement.  Upon the expiration of the 2007 Apple PLA at the end of June 2014, Apple has become unlicensed as to all products that were covered under the agreement and therefore all Apple sales are unlicensed, except to the extent certain products are licensed under the terms of our license agreements with certain Apple suppliers, including Pegatron. In 2015, we recognized $137.9 million of revenue under the 2008 Pegatron PLA, all of which was associated with sales of Apple products. We are engaged in a legal dispute with Pegatron, a Taiwan-based company, regarding, among other things, the terms of the 2008 Pegatron PLA, and we are the subject of an investigation by the Taiwan Fair Trade Commission.  See Item 3, Legal Proceedings in this Form 10-K for a discussion of these matters.
In second quarter 2014, we entered into a patent license agreement with Samsung. The multi-year agreement also resolved all pending litigation between the companies. The royalty-bearing license agreement sets forth terms covering the sale by Samsung of 3G, 4G and certain future generation wireless products. The agreement provides Samsung the ability to terminate certain rights and obligations under the license for the period after 2017 but has the potential to provide a license to

9


Samsung for a total of ten years, including 2013. During 2015, we recognized $69.0 million of revenue associated with this agreement.
As discussed above, during third quarter 2015, we entered into the new Sony PLA. Our prior fixed-fee patent license agreement with Sony, entered into in fourth quarter 2012, expired at the end of November 2015. During 2015, we recognized a total of $60.1 million of revenue associated with this prior agreement and the new Sony PLA, which included $21.8 million of past sales under the new Sony PLA.
Patent Infringement and Declaratory Judgment Proceedings
From time to time, if we believe any party is required to license our patents in order to manufacture, use and/or sell certain products and such party refuses to do so, we may agree with such party to have royalty rates, or other terms, set by third party adjudicators (such as arbitrators) or, in certain circumstances, we may institute legal action against them. This legal action has typically taken the form of a patent infringement lawsuit or an administrative proceeding such as a Section 337 proceeding before the United States International Trade Commission (“USITC” or the "Commission"). In a patent infringement lawsuit, we would typically seek damages for past infringement and an injunction against future infringement. In a USITC proceeding, we would seek an exclusion order to bar infringing goods from entry into the United States, as well as a cease and desist order to bar further sales of infringing goods that have already been imported into the United States. Parties may bring administrative and/or judicial challenges to the validity, enforceability, essentiality and/or applicability of our patents to their products. Parties may also allege that our efforts to enter into a license with that party do not comply with any obligations we may have in connection with our participation in standards-setting organizations, and therefore that we are not entitled to the relief that we seek. For example, a party may allege that we have not complied with an obligation to offer a license to that party on fair, reasonable and non-discriminatory terms and conditions, and may also file antitrust claims or regulatory complaints on that or other bases, and may seek damages or other relief based on such claims. In addition, a party might file a declaratory judgment action to seek a court's declaration that our patents are invalid, unenforceable, not infringed by the other party's products or are not essential. Our response to such a declaratory judgment action may include claims of infringement. When we include claims of infringement in a patent infringement lawsuit, a favorable ruling for the Company can result in the payment of damages for past patent royalties, the setting of a royalty for future sales or issuance by the court of an injunction enjoining the infringer from manufacturing, using and/or selling the infringing product.
Contractual Arbitration Proceedings
We and our customers, in the normal course of business, may have disagreements as to the rights and obligations of the parties under applicable agreements. For example, we could have a disagreement with a licensee as to the amount of reported sales and royalties. Our license agreements typically provide for audit rights as well as private arbitration as the mechanism for resolving disputes. Arbitration proceedings can be resolved through an award rendered by the arbitrators or by settlement between the parties. Parties to arbitration might have the right to have the award reviewed in a court of competent jurisdiction. However, based on public policy favoring the use of arbitration, it is generally difficult to have arbitration awards vacated or modified. The party securing an arbitration award may seek to have that award converted into a judgment through an enforcement proceeding. The purpose of such a proceeding is to secure a judgment that can be used for, if need be, seizing assets of the other party.
Competition
With respect to our technology development activities, we face competition from companies, including in-house development teams at other wireless device companies and semiconductor companies and wireless operators, developing other and similar technologies that are competitive with our solutions that we may market or set forth into the standards-setting arena.
Due to the exclusionary nature of patent rights, we do not compete, in a traditional sense, with other patent holders for licensing relationships or sale transactions. Other patent holders do not have the same rights to the inventions and technologies encompassed by our patent portfolio. In any device or piece of equipment that contains intellectual property, the manufacturer may need to obtain licenses from multiple holders of intellectual property. In licensing our patent portfolio, we compete with other patent holders for a share of the royalties that certain licensees may argue to be the total royalty that is supported by a certain product or products, which may face practical limitations. We believe that licenses under a number of our patents are required to manufacture and sell 3G, 4G and other wireless products. However, numerous companies also claim that they hold 3G, 4G and other wireless patents that are or may be essential or may become essential to cellular and other wireless standards. To the extent that multiple parties all seek royalties on the same product, the manufacturers could claim to have difficulty in meeting the financial requirements of each patent holder. In the past, certain manufacturers have sought antitrust exemptions to act collectively on a voluntary basis. In addition, certain manufacturers have sought to limit aggregate licensing fees or rates

10


for essential patents. Similarly, potential purchasers of our patents often amass patent portfolios for defensive and/or cross-licensing purposes and could choose to acquire patent assets within the same general technology space from other patent holders.
Employees
As of December 31, 2015, we had approximately 330 employees. None of our employees are represented by a collective bargaining unit.
Geographic Concentrations
See Note 4, "Geographic/Customer Concentration," in the Notes to Condensed Consolidated Financial Statements included in Part II, Item 8, of this Form 10-K for financial information about geographic areas for the last three years.
Corporate Information
The ultimate predecessor company of InterDigital, Inc. was incorporated in 1972 under the laws of the Commonwealth of Pennsylvania and conducted its initial public offering in November 1981. Our corporate headquarters and administrative offices are located in Wilmington, Delaware, USA. Our research and technology development centers are located in the following locations: King of Prussia, Pennsylvania, USA; Melville, New York, USA; San Diego, California, USA; Montreal, Quebec, Canada; London, England, United Kingdom; and Seoul, South Korea.
Our Internet address is www.interdigital.com, where, in the “Investors” section, we make available, free of charge, our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, certain other reports and filings required to be filed under the Securities Exchange Act of 1934, as amended, and all amendments to those reports or filings as soon as reasonably practicable after such material is electronically filed with or furnished to the United States Securities and Exchange Commission. The information contained on or connected to our website is not incorporated by reference into this Form 10-K.
Item 1A.      RISK FACTORS.
We face a variety of risks that may affect our business, financial condition, operating results, the trading price of our common stock, or any combination thereof. You should carefully consider the following information and the other information in this Form 10-K in evaluating our business and prospects and before making an investment decision with respect to our common stock. If any of these risks were to occur, our business, financial condition, results of operations or prospects could be materially and adversely affected. In such an event, the market price of our common stock could decline and you could lose all or part of your investment. The risks and uncertainties we describe below are not the only ones facing us. Additional risks not presently known to us or that we currently deem immaterial may also affect our business.
Risks Related to Our Business
Potential patent and litigation reform legislation, potential USPTO and international patent rule changes, potential legislation affecting mechanisms for patent enforcement and available remedies, and potential changes to the intellectual property rights (“IPR”) policies of worldwide standards bodies, as well as rulings in legal proceedings may affect our investments in research and development and our strategies for patent prosecution, licensing and enforcement and could have a material adverse effect on our licensing business as well as our business as a whole.     
Potential changes to certain U.S. and international patent laws, rules and regulations may occur in the future, some or all of which may affect our research and development investments, patent prosecution costs, the scope of future patent coverage we secure, remedies that we may be entitled to in patent litigation, and attorneys’ fees or other remedies that could be sought against us, and may require us to reevaluate and modify our research and development activities and patent prosecution, licensing and enforcement strategies.
Similarly, legislation designed to reduce the jurisdiction and remedial authority of the USITC has periodically been introduced in Congress.  Any potential changes in the law, the IPR policies of standards bodies or other developments that reduce the number of forums available or the type of relief available in such forums (such as injunctive relief), restrict permissible licensing practices (such as our ability to license on a worldwide portfolio basis) or that otherwise cause us to seek alternative forums (such as arbitration or state court), would make it more difficult for us to enforce our patents, whether in adversarial proceedings or in negotiations.  Because we have historically depended on the availability of certain forms of legal process to enforce our patents and obtain fair and adequate compensation for our investments in research and development and

11


the unauthorized use of our intellectual property, developments that undermine our ability to do so could have a negative impact on future licensing efforts. 
Rulings in our legal proceedings as well as those of third parties may affect our strategies for patent prosecution, licensing and enforcement.  For example, in recent years, the United States International Trade Commission (the “USITC”) and U.S. courts, including the U.S. Supreme Court and the U.S. Court of Appeals for the Federal Circuit, have taken some actions that have been viewed as unfavorable to patentees, including the Company. Decisions that occur in U.S. or in international forums may change the law applicable to various patent law issues, such as, for example, patentability, validity, patent exhaustion, patent misuse, remedies, permissible licensing practices, claim construction, and damages, in ways that are detrimental to the abilities of patentees to enforce patents and obtain damages awards.
We continue to monitor and evaluate our strategies for prosecution, licensing and enforcement with regard to these developments; however, any resulting change in such strategies may have an adverse impact on our business and financial condition.
Increased scrutiny by antitrust authorities may affect our strategies for patent prosecution, licensing and enforcement and may increase our costs of doing business and/or lead to monetary fines, penalties or other remedies or sanctions.
Domestic and foreign antitrust authorities have increased their scrutiny of the use of standards-essential patents in the mobile wireless industry, including the enforcement of such patents against competitors. Such scrutiny has resulted in, and may lead to additional, inquiries that may lead to enforcement actions against the Company and/or impact the availability of injunctive and monetary relief, which may adversely affect our strategies for patent prosecution, licensing and enforcement and increase our costs of operation. Such inquiries and/or enforcement actions could result in monetary fines, penalties or other remedies or sanctions that could adversely affect our business and financial condition.
Royalty rates, or other terms, under our patent license agreements could be subject to determination through arbitration or other third party adjudications or regulatory proceedings, and arbitrators or other third party adjudicators or regulators could determine that our patent royalty rates should be at levels lower than our agreed or historical rates or otherwise make determinations resulting in less favorable terms and conditions under our patent license agreements.
Historically, the terms of our patent license agreements, including our royalty rates, have been reached through arms-length bilateral negotiations with our licensees. We could agree, as we did with Huawei pursuant to our December 2013 settlement agreement, to have royalty rates, or other terms, set by third party adjudicators (such as arbitrators) and it is also possible that courts or regulators could decide to set or otherwise determine the fair, reasonable and non-discriminatory (“FRAND”) consistency of such terms. Changes to or clarifications of our obligations to be prepared to offer licenses to standards-essential patents on FRAND terms and conditions could require such terms, including our royalty rates, to be determined through third party adjudications. Finally, certain of our current and prospective licensees have already instigated, and others could in the future instigate, legal proceedings or regulatory proceedings requesting third party adjudicators or regulators, such as China's National Development and Reform Commission and Taiwan's Fair Trade Commission, to set FRAND terms and conditions for, or determine the FRAND-consistency of current terms and conditions in, our patent license agreements. To the extent that our patent royalty rates for our patent license agreements are determined through arbitration or other third party adjudications or regulatory proceedings rather than through bilateral negotiations, because such proceedings are inherently unpredictable and uncertain and there are currently few precedents for such determinations, it is possible that royalty rates may be lower than our agreed or historical rates and could also have a negative impact on royalties we are able to obtain from future licensees, which may have an adverse effect on our revenue and cash flow. In addition, to the extent that other terms and conditions for our patent license agreements are determined through such means, such terms and conditions could be less favorable than our historical terms and conditions, which may have an adverse effect on our licensing business.
Challenges relating to our ability to enter into new license agreements could cause our revenue and cash flow to decline.
We face challenges in entering into new patent license agreements. One of the most significant challenges we face is that most potential licensees do not voluntarily seek to enter into license agreements with us before they commence manufacturing and/or selling devices that use our patented inventions. As a result, we must approach companies that are reluctant to take licenses and attempt to establish license agreements with them. The process of identifying potential users of our inventions and negotiating license agreements with reluctant prospective licensees requires significant time, effort and expense. Once discussions with unlicensed companies have commenced, we face the additional challenges imposed by the significant negotiation issues that arise from time to time. Given these challenges relating to our ability to enter into new license agreements, we cannot assure that all prospective licensees will be identified or, if they are identified, will be persuaded during negotiations to enter into a patent license agreement with us, either at all or on terms acceptable to us, and, as a result, our revenue and cash flow could materially decline. The length of time required to negotiate a license agreement also leads to delays in the receipt of the associated revenue stream, which could also cause our revenue and cash flow to decline.

12


In addition, as discussed more fully above, we are currently operating in a challenging regulatory and judicial environment, which may, under certain circumstances, lead to delays in the negotiation of and entry into new patent license agreements. Also, as discussed below and in Item 3, Legal Proceedings, in this Form 10-K, we are also currently, and may in the future be, involved in legal proceedings with potential licensees, with whom we do not yet have a patent license agreement. Any such delays in the negotiation or entry into new patent license agreements and receipt of the associated revenue stream could cause our revenue and cash flow to decline.
Setbacks in defending and enforcing our patent rights could cause our revenue and cash flow to decline.
Major telecommunications equipment manufacturers have challenged, and we expect will continue to challenge, the infringement, validity and enforceability of certain of our patents. In some instances, certain of our patent claims could be substantially narrowed or declared invalid, unenforceable, not essential or not infringed. We cannot assure that the validity and enforceability of our patents will be maintained or that our patents will be determined to be applicable to any particular product or standard. Moreover, third parties could attempt to circumvent certain of our patents through design changes. Any significant adverse finding as to the validity, infringement, enforceability or scope of our patents and/or any successful design-around of our patents could result in the loss of patent licensing revenue from existing licensees, through termination or modification of agreements or otherwise, and could substantially impair our ability to secure new patent licensing arrangements, either at all or on beneficial terms.
Our revenues are derived primarily from a limited number of licensees or customers.
We earn a significant amount of our revenues from a limited number of licensees or customers, and we expect that a significant portion of our revenues will continue to come from a limited number of licensees or customers for the foreseeable future. For example, in 2015, Pegatron, Samsung and Sony accounted for approximately 31%, 16% and 14% of our total revenues, respectively. In the event that we are unable to renew one or more of such license agreements upon expiration, our future revenue and cash flow could be materially adversely affected. In addition, in the event that one or more of our significant licensees or customers fail to meet their payment or reporting obligations (for example, due to a credit issue or in connection with a legal dispute or similar proceeding) under their respective license agreements, our future revenue and cash flow could be materially adversely affected. See Item 3, Legal Proceedings, in this Form 10-K for a description of our material legal proceedings. In addition, in the event that there is a material decrease in shipments of licensed products by one of our significant per-unit licensees, such as Pegatron (as a result of a change in the Apple supply chain or otherwise), our revenues from such licensee would significantly decline and our future revenue and cash flow could be materially adversely affected.
Due to the nature of our business, we could continue to be involved in a number of costly litigation, arbitration and administrative proceedings to enforce or defend our intellectual property rights and to defend our licensing practices.
While some companies seek licenses before they commence manufacturing and/or selling devices that use our patented inventions, most do not. Consequently, we approach companies and seek to establish license agreements for using our inventions. We expend significant time and effort identifying users and potential users of our inventions and negotiating license agreements with companies that may be reluctant to take licenses. However, if we believe that a third party is required to take a license to our patents in order to manufacture, sell, offer for sale, import or use products, we have in the past commenced, and may in the future, commence legal or administrative action against the third party if they refuse to enter into a license agreement with us. In turn, we have faced, and could continue to face, counterclaims and other legal proceedings that challenge the essential nature of our patents, that our patents are invalid, unenforceable or not infringed or that we have not complied with certain commitments to standards-setting organizations (for example, that our royalty rates or other licensing terms and conditions are allegedly other than FRAND). Litigation adversaries have also filed against us, and other third parties may in the future file, validity challenges such as Inter Partes Review proceedings in the USPTO, which can lead to delays of our patent infringement actions as well as potential findings of invalidity.
Litigation may be also required to enforce our intellectual property rights, protect our trade secrets, enforce patent license and confidentiality agreements or determine the validity, enforceability and scope of proprietary rights of others.
Third parties could commence litigation against us seeking to invalidate our patents or obtain a determination that our patents are not infringed, are not essential, are invalid or are unenforceable. In addition, current and prospective licensees have initiated proceedings against us claiming, and others in the future may claim, that we have not complied with our FRAND commitments and/or engaged in anticompetitive licensing activities.
The cost of enforcing and defending our intellectual property and of defending our licensing practices has been and may continue to be significant. As a result, we could be subject to significant legal fees and costs, including the costs and fees of opposing counsel in certain jurisdictions if we are unsuccessful. In addition, litigation, arbitration and administrative

13


proceedings require significant key employee involvement for significant periods of time, which could divert these employees from other business activities.
Setbacks in defending our patent licensing practices could cause our cash flow and revenue to decline and could have an adverse effect on our licensing business.
Adverse decisions in litigation or regulatory actions relating to our licensing practices, including, but not limited to, findings that we have not complied with our FRAND commitments and/or engaged in anticompetitive licensing activities or that any of our license agreements are void or unenforceable, could have an adverse impact on our cash flow and revenue. Regulatory bodies may assess fines in the event of adverse findings, and in court or arbitration proceedings, an adverse decision could lead to a judgment requiring us to pay damages (including the possibility of treble damages for antitrust claims). In addition, to the extent that legal decisions find patent license agreements to be void or unenforceable in whole or in part, that could lead to a decrease in the revenue associated with and cash flow generated by such agreements. Finally, adverse legal decisions related to our licensing practices could have an adverse effect on our ability to enter into to license agreements, which, in turn, could cause our cash flow and revenue to decline.
Royalty rates could decrease for future license agreements due to downward product pricing pressures and competition over a finite pool of patent royalties.
Royalty payments to us under future license agreements could be lower than anticipated. Certain licensees and others in the wireless industry, individually and collectively, are demanding that royalty rates for patents be lower than historic royalty rates. There is also increasing downward pricing pressure on certain wireless products, including handsets, that we believe implement our patented inventions, and some of our royalty rates are tied to the pricing of handsets. In addition, a number of other companies also claim to hold patents that are essential with respect to products for the cellular market. Demands by certain licensees to reduce royalties due to pricing pressure or the number of patent holders seeking royalties on their cellular technologies, could result in a decrease in the royalty rates we receive for use of our patented inventions, thereby decreasing future revenue and cash flow.
Our plans to broaden our patent-based revenue sources through enhanced intellectual property sourcing, joint ventures, and developing technology in new areas, such as in the IoT space, may not be successful and could materially adversely affect our long-term business, financial condition and operating results.
As part of our business strategy, we are seeking to broaden our patent-based revenue sources through targeted acquisitions, research partnerships, joint ventures and the continued development of new technologies, including relating to IoT. There is no guarantee that we will succeed in acquiring or developing technology and patents or partnering with inventors and research organizations to add new dimensions to our existing portfolio of intellectual property and potentially create new patent licensing programs. Also, our development activities may experience delays, which could reduce our opportunities for patent sales and licensing. In the event that any of these risks materialize, our long-term business, financial condition and operating results may be materially adversely affected.
We may engage in acquisitions or other strategic transactions or make investments that could result in significant changes, costs and/or management disruption and fail to enhance shareholder value.
We may acquire companies, businesses, technology and/or intellectual property, enter into joint ventures or other strategic transactions. In addition, we may make investments in other entities by purchasing minority equity interests or corporate bonds/notes in publicly traded or privately held companies. Acquisitions or strategic investments may increase our costs, including but not limited to accounting and legal fees, and may not generate financial returns or result in increased adoption or continued use of our technologies. Most strategic investments entail a high degree of risk and may not become liquid for a period of time, if at all. In some cases, strategic investments may serve as consideration for a license in lieu of cash royalties. In addition, other investments may not generate financial returns or may result in losses due to market volatility, the general level of interest rates and inflation expectations. We could make strategic investments in early-stage companies, which require us to consolidate or record our share of the earnings or losses of those companies. Our share of any such losses may adversely affect our financial results until we exit from or reduce our exposure to these investments.
Achieving the anticipated benefits of acquisitions depends in part upon our ability to integrate the acquired companies, businesses and/or assets in an efficient and effective manner. The integration of acquired companies or businesses may result in significant challenges, including, among others: successfully integrating new employees, technology and/or products; consolidating research and development operations; minimizing the diversion of management’s attention from ongoing business matters; and consolidating corporate and administrative infrastructures. As a result, we may be unable to accomplish the integration smoothly or successfully. In addition, we cannot be certain that the integration of acquired companies, businesses, technology and/or intellectual property with our business will result in the realization of the full benefits we

14


anticipate to result from such acquisitions. In addition, any acquired company or business would be subject to its own risks that may or may not be the same as the risks already disclosed herein. We may not derive any commercial value from the acquired technology or intellectual property or from future technologies or products based on the acquired technology and/or intellectual property, and we may be subject to liabilities that are not covered by the indemnification protection we may obtain.
Our plans to expand our revenue sources through commercializing our market-ready technologies and developing new technology with commercial applicability may not be successful and could materially adversely affect our long-term business, financial condition and operating results.
As part of our business strategy, we are seeking to expand our revenue sources through the continued development, commercialization and licensing of technology projects. Our technology development activities may experience delays, or the markets for our technology solutions may fail to materialize to the extent or at the rate we expect, each of which could reduce our opportunities for technology sales and licensing. In addition, there could be fewer applications for our technology and products than we expect. The development of technology markets also could be affected by general economic conditions, customer buying patterns, timeliness of equipment development, and the availability of capital for, and the high cost of, infrastructure improvements. Additionally, investing in technology development is costly and may require structural changes to the organization that could require additional costs, including without limitation legal and accounting fees. Furthermore, delays or failures to enter into additional partnering relationships to facilitate technology development efforts or delays or failures to enter into technology licensing agreements to secure integration of additional functionality could impair our ability to introduce into the market portions of our technology and resulting products, cause us to miss critical market windows, or decrease our ability to remain competitive. In addition, the commercialization of certain technologies could potentially lead to patent exhaustion or implied license issues that could limit our ability to derive licensing revenue from certain patents under our patent licensing program. In the event that any of these risks materialize, our long-term business, financial condition and operating results may be materially adversely affected.
Our investments in new commercial initiatives may not be successful or generate meaningful revenues.
We have invested, and may continue to invest, in new businesses focused on commercializing technology that we have developed, incubated internally and/or acquired. Commercial success depends on many factors, including the demand for the technology, the highly competitive markets for our technology products, regulatory issues associated with such technology products, and effective marketing and licensing or product sales. In addition, our new technology offerings may require robust ecosystems of customers and service providers that may fail to materialize. Further, the establishment and operation of these commercial initiatives requires significant support, including technical, legal and financial resources. It is possible that these commercial initiatives will not be successful and/or will not achieve meaningful revenues for a number of years, if at all. Further, we may attempt to develop technologies or services that we believe we would be able to sell or license commercially using inside or outside technical, legal and financial resources. If our new commercial initiatives are not successful, or are not successful in the timeframe we anticipate, we may incur significant costs, our business may not grow as anticipated and/or our reputation may be harmed. The commercialization of certain technologies could potentially lead to patent exhaustion or implied license issues that could limit our ability to derive licensing revenue from certain patents under our patent licensing program. In the event that any of these risks materialize, our long-term business, financial condition and operating results may be materially adversely affected.
Our strategy to diversify our patent-based revenue by pursuing alternative patent licensing arrangements and patent sales may not be successful.
There is no guarantee that we will succeed in our pursuit of select patent licensing arrangements or patent sales, and, if we are successful, there is no guarantee that the revenue and cash flow generated through such patent sales or alternative licensing arrangements (including trust arrangements) will be greater than the revenue and cash flow we would have generated if we had retained and licensed the patents ourselves. In addition, potential licensees may be reluctant to enter into new patent license agreements, and current licensees may be reluctant to renew their agreements, either at all or on terms acceptable to the Company, based on the fact that we have sold portions of our patent portfolio or the belief that we plan to sell or transfer some of the patents we are asking them to license.    
Our revenue and cash flow are dependent upon our licensees' sales and market conditions and other factors that are beyond our control or are difficult to forecast.
A significant portion of our licensing revenues are running royalty-based and dependent on sales by our licensees that are outside our control and that could be negatively affected by a variety of factors, including global and/or country-specific economic conditions, country-specific natural disasters impacting licensee manufacturing and sales, buying patterns of end users, competition for our licensees' products and any decline in the sale prices our licensees receive for their covered products. In addition, our operating results also could be affected by general economic and other conditions that cause a downturn in the

15


market for the licensees of our products or technologies. Our revenue and cash flow also could be affected by (i) the unwillingness of any licensee to satisfy all of their royalty obligations on the terms or within the timeframe we expect, (ii) a decline in the financial condition of any licensee or (iii) the failure of sales to meet market forecasts due to global economic conditions, political instability, natural disasters, competitive technologies or otherwise. It is also difficult to predict the timing, nature and amount of licensing revenue associated with past infringement and new licenses, strategic relationships and the resolution of legal proceedings. The foregoing factors are difficult to forecast and could adversely affect both our quarterly and annual operating results and financial condition. In addition, some of our patent license agreements provide for fixed payments or prepayments that cover our licensees' future sales for a specified period and reduce future cash receipts from those licensees. As a result, our cash flow has historically fluctuated from period to period. Depending upon the payment structure of any new patent license agreements into which we may enter, such cash flow fluctuations may continue in the future.
Our revenue may be affected by the deployment of future-generation wireless standards in place of 3G and 4G technologies or by the need to extend or modify certain existing license agreements to cover subsequently issued patents.
Although we own an evolving portfolio of issued and pending patents related to 3G, 4G and 5G cellular technologies and non-cellular technologies, our patent portfolio licensing program for future-generation wireless standards may not be as successful in generating licensing income as our current licensing programs. Although we continue to participate in worldwide standards bodies and contribute our intellectual property to future-generation wireless standards, our technologies might not be adopted by the relevant standards, we may not be as successful in the licensing of future-generation products as we have been in licensing 3G and 4G products, or we may not achieve a level of royalty revenues on such products that is comparable to that which we have historically received on 3G and 4G products.
The licenses that we grant under our patent license agreements typically only cover products designed to operate in accordance with specified cellular technologies and that were manufactured or deployed or anticipated to be manufactured or deployed at the time of entry into the agreement. Also, we have patent license agreements with licensees that now offer for sale types of products that were not sold by such licensees at the time the patent license agreements were entered into and, thus, are not licensed by us. We do not derive patent licensing revenue from the sale of products by our licensees that are not covered by a patent license agreement. In order to grant a patent license for any such products, we will need to extend or modify our patent license agreements or enter into new license agreements with such licensees. We may not be able to extend or modify these license agreements, or enter into new license agreements, on financial terms acceptable to us, without affecting the other material terms and conditions of our license agreements with such licensees or at all. Further, such extensions, modifications or new license agreements may adversely affect our revenue on the sale of products covered by the license prior to any extension, modification or new license.
We face risks from doing business in international markets.
A significant portion of our licensees, potential licensees and customers are international, and our licensees, potential licensees and customers sell their products to markets throughout the world. Accordingly, we could be subject to the effects of a variety of uncontrollable and changing factors, including, but not limited to: difficulty in protecting our intellectual property in foreign jurisdictions; enforcing contractual commitments in foreign jurisdictions or against foreign corporations; government regulations, tariffs and other applicable trade barriers; biased enforcement of foreign laws and regulations to promote industrial or economic policies at our expense; currency control regulations and variability in the value of the U.S. dollar against foreign currency; social, economic and political instability; natural disasters, acts of terrorism, widespread illness and war; potentially adverse tax consequences; and general delays in remittance of and difficulties collecting non-U.S. payments. In addition, we also are subject to risks specific to the individual countries in which we and our licensees, potential licensees and customers do business.    
We depend on key senior management, engineering, patent and licensing resources.
Our future success depends largely upon the continued service of our executive officers and other key management and technical personnel. Our success also depends on our ability to continue to attract, retain and motivate qualified personnel with specialized patent, licensing, engineering and other skills. The market for such talent in our industry is extremely competitive. In particular, competition exists for qualified individuals with expertise in patents and in licensing and with significant engineering experience in cellular and air interface technologies. Our ability to attract and retain qualified personnel could be affected by any adverse decisions in any litigation, arbitration or regulatory proceeding, by our ability to offer competitive cash and equity compensation and work environment conditions and by the geographic location of our various offices. The failure to attract and retain such persons with relevant and appropriate experience could interfere with our ability to enter into new license agreements and undertake additional technology and product development efforts, as well as our ability to meet our strategic objectives.
Our technologies may not be become patented, adopted by wireless standards or widely deployed.

16


We invest significant resources in the development of advanced technology and related solutions. However, certain of our inventions that we believe will be employed in current and future products, including 4G and beyond, are the subject of patent applications where no patent has been issued to us yet by the relevant patent issuing authorities. There is no assurance that these applications will issue as patents, either at all or with claims that would be required by products in the market currently or in the future. Our investments may not be recoverable or may not result in meaningful revenue if a sufficient number of our technologies are not patented and adopted by the relevant standards or if products based on the technologies in which we invest are not widely deployed. Competing technologies could reduce the opportunities for the adoption or deployment of technologies we develop. If the technologies in which we invest do not become patented or are not adopted by the relevant standards or deployed in the mainstream markets, at all or at the rate or within time periods we expect, or if we are unable to secure partner support for our technologies, our business, financial condition and operating results could be adversely affected.
Concentration and consolidation in the wireless communications industry could adversely affect our business.
There is some concentration among participants in the wireless communications industry, and the industry has experienced consolidation of participants and sales of participants or their businesses, and these trends may continue. For example, in 2015, Samsung, Apple and Huawei collectively accounted for more than 40% of worldwide shipments of 3G and 4G handsets. Any further concentration or sale within the wireless industry among handset providers and/or original design manufacturers ("ODMs") may reduce the number of licensing opportunities or, in some instances, result in the reduction, loss or elimination of existing royalty obligations. In addition, acquisitions of or consolidation among ODMs could cause handset providers who outsource manufacturing to make supply chain changes, which in turn could result in the reduction, loss or elimination of existing royalty obligations (for example, if manufacturing is moved from an ODM with which we have a patent license agreement to an ODM with which we do not). Further, if wireless carriers consolidate with companies that utilize technologies that are competitive with our technologies or that are not covered by our patents, we could lose market opportunities, which could negatively impact our revenues and financial condition.
Changes to our tax assets or liabilities could have an adverse effect on our consolidated financial condition or results of operations.
The calculation of tax assets and liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex tax laws. We are subject to examinations by the Internal Revenue Service (IRS) and other taxing jurisdictions on various tax matters, including challenges to various positions we assert in our filings and foreign tax liability and withholding. With our January 1, 2007 adoption of the guidance for accounting for uncertainty in income taxes, certain tax contingencies are recognized when they are determined to be more likely than not to occur. Although we believe we have adequately recorded tax assets and accrued for tax contingencies that meet this criterion, we may not fully recover our tax assets or may be required to pay taxes in excess of the amounts we have accrued. As of December 31, 2015 and 2014, there were certain tax contingencies that did not meet the applicable criteria to record an accrual. In the event that the IRS or another taxing jurisdiction levies an assessment in the future, it is possible the assessment could have an adverse effect on our consolidated financial condition or results of operations.
It can be difficult for us to verify royalty amounts owed to us under our licensing agreements, and this may cause us to lose potential revenue.    
The standard terms of our license agreements require our licensees to document the sale of licensed products and report this data to us on a quarterly basis. Although our standard license terms give us the right to audit books and records of our licensees to verify this information, audits can be expensive, time consuming, incomplete and subject to dispute. From time to time, we audit certain of our licensees to verify independently the accuracy of the information contained in their royalty reports in an effort to decrease the likelihood that we will not receive the royalty revenues to which we are entitled under the terms of our license agreements, but we cannot give assurances that these audits will be numerous enough and/or effective to that end.
Delays in renewing or an inability to renew existing license agreements could cause our revenue and cash flow to decline.
Many of our license agreements have fixed terms. Although we endeavor to renew license agreements with fixed terms prior to the expiration of the license agreements, due to various factors, including the technology and business needs and competitive positions of our licensees and, at times, reluctance on the part of our licensees to participate in renewal discussions, we may not be able to renegotiate the license agreements on acceptable terms before the expiration of the license agreement, on acceptable terms after the expiration of the license agreement, or at all. If there is a delay in renegotiating and renewing a license agreement prior to its expiration, there could be a gap in time during which we may be unable to recognize revenue from that licensee or we may be forced to renegotiate and renew the license agreement on terms that are more favorable to such licensee, and, as a result, our revenue and cash flow could be materially adversely affected. In addition, if we fail to renegotiate

17


and renew our license agreements at all, we could lose existing licensees, and our revenue and cash flow could be materially adversely affected.
Our industry is subject to rapid technological change, uncertainty and shifting market opportunities.
Our success depends, in part, on our ability to define and keep pace with changes in industry standards, technological developments and varying customer requirements. Changes in industry standards and needs could adversely affect the development of, and demand for, our technology, rendering our technology currently under development obsolete and unmarketable. The patents and applications comprising our portfolio have fixed terms, and, if we fail to anticipate or respond adequately to these changes through the development or acquisition of new patentable inventions, patents or other technology, we could miss a critical market opportunity, reducing or eliminating our ability to capitalize on our patents, technology solutions or both.
The high amount of capital required to obtain radio frequency licenses, deploy and expand wireless networks and obtain new subscribers could slow the growth of the wireless communications industry and adversely affect our business.
Our growth is dependent upon the increased use of wireless communications services that utilize our technology. In order to provide wireless communications services, wireless operators must obtain rights to use specific radio frequencies. The allocation of frequencies is regulated in the United States and other countries throughout the world, and limited spectrum space is allocated to wireless communications services. Industry growth may be affected by the amount of capital required to obtain licenses to use new frequencies, deploy wireless networks to offer voice and data services, expand wireless networks to grow voice and data services and obtain new subscribers. The significant cost of licenses, wireless networks and subscriber additions may slow the growth of the industry if wireless operators are unable to obtain or service the additional capital necessary to implement or expand advanced wireless networks. The growth of our business could be adversely affected if this occurs.
Market projections and data are forward-looking in nature.
Our strategy is based on our own projections and on analyst, industry observer and expert projections, which are forward-looking in nature and are inherently subject to risks and uncertainties. The validity of their and our assumptions, the timing and scope of wireless markets, economic conditions, customer buying patterns, timeliness of equipment development, pricing of products, growth in wireless telecommunications services that would be delivered on wireless devices and availability of capital for infrastructure improvements could affect these predictions. In addition, market data upon which we rely is based on third party reports that may be inaccurate. The inaccuracy of any of these projections and/or market data could adversely affect our operating results and financial condition.
We face competition from companies developing other or similar technologies.
We face competition from companies developing other and similar technologies that are competitive with our solutions that we may market or set forth into the standards-setting arena. Due to competing solutions, our solutions may not find a viable commercial marketplace or be adopted by the relevant standards. In addition, in licensing our patent portfolio, we may compete with other companies, many of whom also claim to hold essential patents, for a share of the royalties that certain licensees may argue to be the total royalty that is supported by a certain product or products. In any device or piece of equipment that contains intellectual property, the manufacturer may need to obtain a license from multiple holders of intellectual property. To the extent that multiple parties all seek royalties on the same product, the manufacturers could claim to have difficulty in meeting the financial requirements of each patent holder.
Our technology development activities may experience delays.
We may experience technical, financial, resource or other difficulties or delays related to the further development of our technologies. Delays may have adverse financial effects and may allow competitors with comparable technology offerings to gain an advantage over us in the marketplace or in the standards setting arena. There can be no assurance that we will continue to have adequate staffing or that our development efforts will ultimately be successful. Moreover, certain of our technologies have not been fully tested in commercial use, and it is possible that they may not perform as expected. In such cases, our business, financial condition and operating results could be adversely affected, and our ability to secure new licensees and other business opportunities could be diminished.
We rely on relationships with third parties to develop and deploy technology solutions.
Successful exploitation of our technology solutions is partially dependent on the establishment and success of relationships with equipment producers and other industry participants. Delays or failure to enter into licensing or other relationships to facilitate technology development efforts or delays or failure to enter into technology licensing agreements to

18


secure integration of additional functionality could impair our ability to introduce into the market portions of our technology and resulting products, cause us to miss critical market windows or impair our ability to remain competitive.
Our engineering services business could subject us to specific costs and risks that we might fail to manage adequately.
We derive a portion of our revenues from engineering services. Any mismanagement of, or negative development in, a number of areas, including, among others, the perceived value of our intellectual property portfolio, our ability to convince customers of the value of our engineering services and our reputation for performance under our service contracts, could cause our revenues from engineering services to decline, damage our reputation and harm our ability to attract future licensees, which would in turn harm our operating results. If we fail to deliver as required under our service contracts, we could lose revenues and become subject to liability for breach of contract. We need to monitor these services adequately in order to ensure that we do not incur significant expenses without generating corresponding revenues. Our failure to monitor these services adequately may harm our business, financial position, results of operations or cash flows.
Changes in financial accounting standards or policies may affect our reported financial condition or results of operations.
From time to time the Financial Accounting Standards Board (the “FASB”) and the SEC change their guidance governing the form and content of our external financial statements. In addition, accounting standard setters and those who interpret U.S. generally accepted accounting principles (“GAAP”), such as the FASB and the SEC may change or even reverse their previous interpretations or positions with regard to how these standards should be applied. A change in accounting principles or their interpretation can have a significant effect on our reported results. In certain cases, we could be required to apply new or revised guidance retroactively or apply existing guidance differently. For example, in May 2014, the FASB and International Accounting Standards Board issued revenue guidance, Revenue from Contracts with Customers, that, once adopted by the Company could significantly impact the timing of revenue recognition for new and existing contracts with licensees. See Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations -- Overview -- New Accounting Guidance. This and other potential changes in reporting standards could substantially change our reporting practices in a number of areas, including revenue recognition and recording of assets and liabilities, and affect our reported financial condition or results of operations.
Currency fluctuations could negatively affect future product sales or royalty revenues or increase the U.S. dollar cost of our activities and international strategic investments.
We are exposed to risk from fluctuations in currencies, which may change over time as our business practices evolve, that could impact our operating results, liquidity and financial condition. We operate and invest globally. Adverse movements in currency exchange rates may negatively affect our business due to a number of situations, including the following:
If the effective price of products sold by our licensees were to increase as a result of fluctuations in the exchange rate of the relevant currencies, demand for the products could fall, which in turn would reduce our royalty revenues.
Assets or liabilities of our consolidated subsidiaries may be subject to the effects of currency fluctuations, which may affect our reported earnings. Our exposure to foreign currencies may increase as we expand into new markets.
Certain of our operating and investing costs, such as foreign patent prosecution, are based in foreign currencies. If these costs are not subject to foreign exchange hedging transactions, strengthening currency values in selected regions could adversely affect our near-term operating expenses, investment costs and cash flows. In addition, continued strengthening of currency values in selected regions over an extended period of time could adversely affect our future operating expenses, investment costs and cash flows.
Our business and operations could suffer in the event of security breaches.
Attempts by others to gain unauthorized access to information technology systems are becoming more sophisticated. These attempts, which in some cases could be related to industrial or other espionage, include covertly introducing malware to computers and networks and impersonating authorized users, among others. We seek to detect and investigate all security incidents and to prevent their recurrence, but, in some cases, we might be unaware of an incident or its magnitude and effects. While we have not identified any material incidents of unauthorized access to date, the theft, unauthorized use or publication of our intellectual property and/or confidential business or personal information could harm our competitive or negotiating positions, reduce the value of our investment in research and development and other strategic initiatives, compromise our patent enforcement strategies or outlook, damage our reputation or otherwise adversely affect our business. In addition, to the extent that any future security breach results in inappropriate disclosure of our employees’, licensees’, or customers’ confidential and /or personal information, we may incur liability or additional costs to remedy any damages caused by such

19


breach. We could also be impacted by existing and proposed laws and regulations, as well as government policies and practices related to cybersecurity, privacy and data protection.
If wireless handsets are perceived to pose health and safety risks, demand for products of our licensees could decrease.
Media reports and certain studies have suggested that radio frequency emissions from wireless handsets may be linked to health concerns, such as brain tumors, other malignancies and genetic damage to blood, and may interfere with electronic medical devices, such as pacemakers, telemetry and delicate medical equipment. Growing concerns over radio frequency emissions, even if unfounded, could discourage the use of wireless handsets and cause a decrease in demand for the products of our licensees. In addition, concerns over safety risks posed by the use of wireless handsets while driving and the effect of any resulting legislation could reduce demand for the products of our licensees.
Risks Relating to Our Common Stock and the Notes
The price of our common stock is volatile and may decline regardless of our operating performance.
Historically, we have had large fluctuations in the price of our common stock, and such fluctuations could continue. From January 3, 2013 to February 17, 2016, the trading price of our common stock has ranged from a low of $26.25 per share to a high of $60.69 per share. The market price for our common stock is volatile and may fluctuate significantly in response to a number of factors, most of which we cannot control, including:
the public's response to press releases or other public announcements by us or third parties, including our filings with the SEC and announcements relating to licensing, technology development, litigation, arbitration and other legal proceedings in which we are involved and intellectual property impacting us or our business;
announcements concerning strategic transactions, such as commercial initiatives, joint ventures, strategic investments, acquisitions or divestitures;
financial projections we may provide to the public, any changes in these projections or our failure to meet these projections;
changes in financial estimates or ratings by any securities analysts who follow our common stock, our failure to meet these estimates or failure of those analysts to initiate or maintain coverage of our common stock;
investor perceptions as to the likelihood of achievement of near-term goals;
changes in market share of significant licensees;
changes in operating performance and stock market valuations of other wireless communications companies generally; and
market conditions or trends in our industry or the economy as a whole.
In the past, stockholders have instituted securities class action litigation following periods of market volatility. If we were involved in securities litigation, we could incur substantial costs and our resources and the attention of management could be diverted from our business.
Our increased indebtedness could adversely affect our business, financial condition and results of operations and our ability to meet our payment obligations under such indebtedness.
Our total indebtedness as of December 31, 2015 was approximately $546.0 million. This level of debt could have significant consequences on our future operations, including:
making it more difficult for us to meet our payment and other obligations under our 2.50% Senior Convertible Notes due 2016 (the "2016 Notes) and our 1.50% Senior Convertible Notes due 2020 (the "2020 Notes and, together with the 2016 Notes, the "Notes");
reducing the availability of our cash flow to fund working capital, capital expenditures, acquisitions and other general corporate purposes, and limiting our ability to obtain additional financing for these purposes;
limiting our flexibility in planning for, or reacting to, and increasing our vulnerability to, changes in our business, the industry in which we operate and the general economy; and
placing us at a competitive disadvantage compared to our competitors that have less debt or are less leveraged.
Any of the above-listed factors could have an adverse effect on our business, financial condition and results of operations and our ability to meet our payment obligations under the Notes.
Our ability to meet our payment and other obligations under the Notes depends on our ability to generate significant cash flow in the future. This, to some extent, is subject to general economic, financial, competitive, legislative and regulatory factors as well as other factors that are beyond our control. We cannot be certain that our business will generate cash flow from operations, or that future borrowings will be available to us, in an amount sufficient to enable us to meet our payment

20


obligations under the Notes and to fund other liquidity needs. If we are not able to generate sufficient cash flow to service our debt obligations, we may need to refinance or restructure our debt, including the Notes, sell assets, reduce or delay capital investments, or seek to raise additional capital. If we are unable to implement one or more of these alternatives, we may not be able to meet our payment obligations under the Notes, and this default could cause us to be in default on any other currently existing or future outstanding indebtedness.
Our stockholders may not receive the level of dividends provided for in our dividend policy or any dividend at all, and any decrease in or suspension of the dividend could cause our stock price to decline.
Our current dividend policy, contemplates the payment of a regular quarterly cash dividend of $0.20 per share on our outstanding common stock. We expect to continue to pay quarterly cash dividends on our common stock at the rate set forth in our current dividend policy. However, the dividend policy and the payment and timing of future cash dividends under the policy are subject to the final determination each quarter by our Board of Directors that (i) the dividend will be made in compliance with laws applicable to the declaration and payment of cash dividends, including Section 1551(b) of the Pennsylvania Business Corporation Law, and (ii) the policy remains in our best interests, which determination will be based on a number of factors, including our earnings, financial condition, capital resources and capital requirements, alternative uses of capital, restrictions imposed by any existing debt, economic conditions and other factors considered relevant by the Board of Directors. Given these considerations, our Board of Directors may increase or decrease the amount of the dividend at any time and may also decide to vary the timing of or suspend or discontinue the payment of cash dividends in the future. Any decrease in the amount of the dividend, or suspension or discontinuance of payment of a dividend, could cause our stock price to decline.
If securities or industry analysts fail to continue publishing research about our business, our stock price and trading volume could decline.
The trading market for our common stock is influenced by the research and reports that industry or securities analysts publish about us or our business. If one or more of these analysts cease coverage of our company or fail to publish reports on us regularly, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.
The convertible note hedge transactions and warrant transactions that we entered into in connection with the offering of the Notes may affect the value of the Notes and the market price of our common stock.
In connection with each offering of the Notes, we entered into convertible note hedge transactions with certain financial institutions (the “option counterparties”) and sold warrants to the option counterparties. These transactions will be accounted for as an adjustment to our stockholders’ equity. The convertible note hedge transactions are expected to reduce the potential equity dilution upon conversion of the Notes. The warrants will have a dilutive effect on our earnings per share to the extent that the market price of our common stock exceeds the applicable strike price of the warrants on any expiration date of the warrants.
In connection with establishing their initial hedge of these transactions, the option counterparties (and/or their affiliates) purchased our common stock in open market transactions and/or privately negotiated transactions and/or entered various cash-settled derivative transactions with respect to our common stock concurrently with, or shortly after, the pricing of the Notes. These activities could have the effect of increasing (or reducing the size of any decrease in) the price of our common stock concurrently with or following the pricing of the Notes. In addition, the option counterparties (and/or their affiliates) may modify their respective hedge positions from time to time (including during any observation period related to a conversion of the Notes) by entering into or unwinding various derivative transactions with respect to our common stock and/or by purchasing or selling our common stock in open market transactions and/ or privately negotiated transactions.
The potential effect, if any, of any of these transactions and activities on the market price of our common stock will depend in part on market conditions and cannot be ascertained at this time, but any of these activities could adversely affect the market price of our common stock.
Future sales or other dilution of our equity could depress the market price of our common stock.
Sales of our common stock in the public market, or the perception that such sales could occur, could negatively impact the market price of our common stock. We also have several institutional stockholders that own significant blocks of our common stock. If one or more of these stockholders were to sell large portions of their holdings in a relatively short time, for liquidity or other reasons, the prevailing market price of our common stock could be negatively affected.

21


Under certain circumstances, shares of our common stock could be issued upon conversion of the Notes, which would dilute the ownership interest of our existing stockholders. In addition, the issuance of additional common stock, or issuances of securities convertible into or exercisable for our common stock or other equity linked securities, including preferred stock or warrants, would dilute the ownership interest of our common stockholders and could depress the market price of our common stock and impair our ability to raise capital through the sale of additional equity securities.
Approved stock repurchase programs may not result in a positive return of capital to stockholders.
Our board-approved stock repurchase program may not return value to stockholders because the market price of the stock may decline significantly below the levels at which we repurchased shares of stock. Stock repurchase programs are intended to deliver stockholder value over the long term, but stock price fluctuations can reduce the effectiveness of such programs.
Provisions of the Notes could discourage an acquisition of us by a third party.
Certain provisions of the Notes could make it more difficult or more expensive for a third party to acquire us. Upon the occurrence of certain transactions constituting a fundamental change, holders of the Notes will have the right, at their option, to require us to repurchase all of their Notes or any portion of the principal amount of such Notes in integral multiples of $1,000. We may also be required to issue additional shares upon conversion in the event of certain fundamental change transactions. These provisions could limit the price that some investors might be willing to pay in the future for shares of our common stock.
We are subject to counterparty risk with respect to the convertible note hedge transactions.
The option counterparties are financial institutions or affiliates of financial institutions, and we will be subject to the risk that the option counterparties may default under the respective convertible note hedge transactions. Our exposure to the credit risk of the option counterparties is not secured by any collateral. Recent global economic conditions have resulted in the actual or perceived failure or financial difficulties of many financial institutions. If an option counterparty becomes subject to insolvency proceedings, we will become an unsecured creditor in those proceedings with a claim equal to our exposure at that time under the convertible note hedge transactions. Our exposure will depend on many factors but, generally, the increase in our exposure will be correlated to the increase in our common stock market price and in volatility of our common stock. In addition, upon a default by an option counterparty, we may suffer adverse tax consequences and dilution with respect to our common stock. We can provide no assurance as to the financial stability or viability of the option counterparties.
The accounting method for convertible debt securities, such as the Notes, could have a material adverse effect on our reported financial results.
In May 2008, the FASB, issued ASC 470-20. Under ASC 470-20, an entity must separately account for the liability and equity components of convertible debt instruments, such as the Notes, that may be settled partially in cash upon conversion in a manner that reflects the issuer’s economic interest cost. ASC 470-20 requires the fair value of the conversion option of the Notes be reported as a component of stockholders’ equity and included in the additional paid-in-capital on our consolidated balance sheet. The value of the conversion option of the Notes will be reported as discount to the Notes. We will report lower net income in our financial results because ASC 470-20 will require interest to include both the current period’s amortization of the debt discount (non-cash interest) and the instrument’s cash interest, which could adversely affect our reported or future financial results, the trading price of our common stock and the trading price of the Notes.

Item 1B.
UNRESOLVED STAFF COMMENTS.
None.
Item 2.
PROPERTIES.
Our headquarters are located in Wilmington, Delaware, USA. Our research and development activities are conducted primarily in facilities located in King of Prussia, Pennsylvania, USA; Melville, New York, USA; San Diego, California, USA; and Montreal, Quebec, Canada. During second quarter 2015, we sold our facility in King of Prussia, Pennsylvania, to a third party and entered into a limited leaseback arrangement for a period not to exceed one year. We expect to transfer the personnel and research and development activities currently performed in the King of Prussia, Pennsylvania, facility to a leased facility in Conshohocken, Pennsylvania, in second quarter 2016.
The following table sets forth information with respect to our principal properties:

22


Location
Approximate Square Feet
Principal Use
Lease Expiration Date
Conshohocken, Pennsylvania
30,300
Administrative office and research space
October 2026*
King of Prussia, Pennsylvania
32,000
Administrative office and research space
May 2016*
Melville, New York
44,800
Administrative office and research space
February 2020
Wilmington, Delaware
36,200
Corporate headquarters
November 2022
Montreal, Quebec
17,300
Office and research space
June 2021
San Diego, California
11,800
Office and research space
April 2018
*     As discussed above, we expect to move from the King of Prussia, Pennsylvania, facility to the Conshohocken, Pennsylvania, facility in second quarter 2016.
We are also a party to leases for several smaller spaces, including our offices in London, England, United Kingdom, and Seoul, South Korea that contain office and research space. In addition, we own a building in Washington, District of Columbia, USA, that houses administrative office space.
We believe that the facilities described above are suitable and adequate for our present purposes and our needs in the near future.

Item 3.
LEGAL PROCEEDINGS.

ARBITRATIONS AND COURT PROCEEDINGS (OTHER THAN DE DISTRICT COURT ACTIONS RELATED TO USITC PROCEEDINGS)
Huawei Arbitration
On December 23, 2013, InterDigital and Huawei agreed to engage in an expedited binding arbitration to resolve their licensing disputes. Pursuant to their agreement, on April 9, 2014, InterDigital and Huawei initiated an arbitration with the International Court of Arbitration of the International Chamber of Commerce (ICC) jointly seeking a determination by an arbitral tribunal of FRAND royalty terms and conditions to be included in a binding worldwide patent license agreement to take effect upon issuance of the arbitration award. An arbitration hearing was held on January 12-16, 2015. On May 26, 2015, the panel convened by the ICC delivered a confidential partial award. The panel convened by the ICC delivered a confidential final award dated July 14, 2015.
On July 9, 2015, InterDigital filed a petition in the District Court for the Southern District of New York for an order confirming the arbitration award (the “New York Proceeding”). On the same day, Huawei filed an action in the Paris Court of Appeal requesting annulment of the arbitration award (the “Paris Proceeding”).
On July 24, 2015, Huawei opposed InterDigital’s petition in the New York Proceeding and filed a motion to stay the New York Proceeding pending the Paris Proceeding. On August 14, 2015, InterDigital amended its petition in the New York Proceeding to take into account the issuance of the arbitration panel’s final award. A hearing in the New York Proceeding was held on February 16, 2016. On February 17, 2016, the judge notified the parties that he had rendered a decision on Huawei’s motion to stay the New York Proceeding, finding that the New York Proceeding should be stayed pending the Paris Proceeding, subject to a requirement that Huawei post suitable security, pursuant to Article VI of the New York Convention, in the amount of the final award, together with interest.  The stay is subject to revision should circumstances change, and InterDigital can renew its petition for an order confirming the award after the outcome of the Paris Proceeding is determined.
Huawei filed its brief seeking annulment in the Paris Proceeding on July 24, 2015. A hearing in the Paris Proceeding is scheduled for March 8, 2016.
To date, Huawei has not made any payments under the arbitration award. We will recognize any related revenue in the period in which the amount of revenue is fixed or determinable and collectability is reasonably assured.

23


Huawei China Proceedings
On February 21, 2012, InterDigital was served with two complaints filed by Huawei Technologies Co., Ltd. in the Shenzhen Intermediate People's Court in China on December 5, 2011. The first complaint named as defendants InterDigital, Inc. and its wholly owned subsidiaries InterDigital Technology Corporation and InterDigital Communications, LLC (now InterDigital Communications, Inc.), and alleged that InterDigital had abused its dominant market position in the market for the licensing of essential patents owned by InterDigital by engaging in allegedly unlawful practices, including differentiated pricing, tying and refusal to deal. The second complaint named as defendants the Company's wholly owned subsidiaries InterDigital Technology Corporation, InterDigital Communications, LLC (now InterDigital Communications, Inc.), InterDigital Patent Holdings, Inc. and IPR Licensing, Inc. and alleged that InterDigital had failed to negotiate on FRAND terms with Huawei. Huawei asked the court to determine the FRAND rate for licensing essential Chinese patents to Huawei and also sought compensation for its costs associated with this matter.
On February 4, 2013, the Shenzhen Intermediate People's Court issued rulings in the two proceedings. With respect to the first complaint, the court decided that InterDigital had violated the Chinese Anti-Monopoly Law by (i) making proposals for royalties from Huawei that the court believed were excessive, (ii) tying the licensing of essential patents to the licensing of non-essential patents, (iii) requesting as part of its licensing proposals that Huawei provide a grant-back of certain patent rights to InterDigital and (iv) commencing a USITC action against Huawei while still in discussions with Huawei for a license. Based on these findings, the court ordered InterDigital to cease the alleged excessive pricing and alleged improper bundling of InterDigital's Chinese essential and non-essential patents, and to pay Huawei 20.0 million RMB (approximately $3.2 million) in damages related to attorneys’ fees and other charges, without disclosing a factual basis for its determination of damages. The court dismissed Huawei's remaining allegations, including Huawei's claim that InterDigital improperly sought a worldwide license and improperly sought to bundle the licensing of essential patents on multiple generations of technologies. With respect to the second complaint, the court determined that, despite the fact that the FRAND requirement originates from ETSI's Intellectual Property Rights policy, which refers to French law, InterDigital's license offers to Huawei should be evaluated under Chinese law. Under Chinese law, the court concluded that the offers did not comply with FRAND. The court further ruled that the royalties to be paid by Huawei for InterDigital's 2G, 3G and 4G essential Chinese patents under Chinese law should not exceed 0.019% of the actual sales price of each Huawei product.
On March 11, 2013, InterDigital filed notices of appeal with respect to the judgments in both proceedings, seeking reversal of the court’s February 4, 2013 rulings. On October 16, 2013, the Guangdong Province High Court issued a ruling affirming the ruling of the Shenzhen Intermediate People's Court in the second proceeding, and on October 21, 2013, issued a ruling affirming the ruling of the Shenzhen Intermediate People's Court in the first proceeding.
InterDigital believes that the decisions are seriously flawed both legally and factually. For instance, in determining a purported FRAND rate, the Chinese courts applied an incorrect economic analysis by evaluating InterDigital’s lump-sum patent license agreement with Apple in hindsight to posit a running royalty rate. Indeed, the ALJ in USITC Inv. No. 337-TA-800 rejected that type of improper analysis. Moreover, the Chinese courts had an incomplete record and applied incorrect facts, including with respect to InterDigital’s now-expired license agreement with Apple, which had been found in an arbitration between InterDigital and Apple to be limited in scope.
On April 14, 2014, InterDigital filed a petition for retrial of the second proceeding with the Chinese Supreme People’s Court (“SPC”), seeking dismissal of the judgment or at least a higher, market-based royalty rate for a license to InterDigital’s Chinese standards-essential patents (“SEPs”).  The petition for retrial argues, for example, that (1) the lower court improperly determined a Chinese FRAND running royalty rate by using as a benchmark the Apple lump sum fixed payment license agreement, and looking in hindsight at the unexpectedly successful sales of Apple iPhones to construct an artificial running royalty rate that neither InterDigital nor Apple could have intended and that would have varied significantly depending on the relative success or failure in hindsight of Apple iPhone sales; (2) the Apple license agreement was also an inappropriate benchmark because its scope of product coverage was significantly limited as compared to the license that the court was considering for Huawei, particularly when there are other more comparable license agreements; and (3) if the appropriate benchmarks had been used, and the court had considered the range of royalties offered by other similarly situated SEP holders in the wireless telecommunications industry, the court would have determined a FRAND royalty that was substantially higher than 0.019%, and would have found, consistent with findings of the ALJ’s initial determination in the USITC 337-TA-800 proceeding, that there was no proof that InterDigital’s offers to Huawei violated its FRAND commitments.
The SPC held a hearing on October 31, 2014, regarding whether to grant a retrial and requested that both parties provide additional information regarding the facts and legal theories underlying the case. The SPC convened a second hearing on April 1, 2015 regarding whether to grant a retrial. InterDigital continues to provide additional information to the SPC in support of its petition for retrial. If the retrial is granted, the SPC will likely schedule one or more additional hearings before it issues a decision on the merits of the case.

24


ZTE China Proceedings
On July 10 and 11, 2014, InterDigital was served with two complaints filed by ZTE Corporation in the Shenzhen Intermediate People's Court in China on April 3, 2014. The first complaint names as defendants the Company's wholly owned subsidiaries InterDigital Technology Corporation, InterDigital Communications, Inc., InterDigital Patent Holdings, Inc. and IPR Licensing, Inc. This complaint alleges that InterDigital has failed to comply with its FRAND obligations for the licensing of its Chinese standards-essential patents. ZTE is asking the court to determine the FRAND rate for licensing InterDigital’s standards-essential Chinese patents to ZTE and also seeks compensation for its litigation costs associated with this matter. The second complaint names as defendants InterDigital, Inc. and its wholly owned subsidiaries InterDigital Technology Corporation and InterDigital Communications, Inc. This complaint alleges that InterDigital has a dominant market position in China and the United States in the market for the licensing of essential patents owned by InterDigital, and abused its dominant market position in violation of the Chinese Anti-Monopoly Law by engaging in allegedly unlawful practices, including excessively high pricing, tying, discriminatory treatment, and imposing unreasonable trading conditions.  ZTE seeks relief in the amount of 20.0 million RMB (approximately $3.1 million based on the exchange rate as of December 31, 2015), an order requiring InterDigital to cease the allegedly unlawful conduct and compensation for its litigation costs associated with this matter.
On August 7, 2014, InterDigital filed petitions challenging the jurisdiction of the Shenzhen Intermediate People's Court to hear the actions. On August 28, 2014, the court denied InterDigital’s jurisdictional challenge with respect to the anti-monopoly law case. InterDigital filed an appeal of this decision on September 26, 2014. On September 28, 2014, the court denied InterDigital’s jurisdictional challenge with respect to the FRAND case, and InterDigital filed an appeal of that decision on October 27, 2014. On December 18, 2014, the Guangdong High Court issued decisions on both appeals upholding the Shenzhen Intermediate Court’s decisions that it had jurisdiction to hear these cases. On February 10, 2015, InterDigital filed a petition for retrial with the Supreme People’s Court regarding its jurisdictional challenges to both cases.
The Shenzhen Court held hearings on the anti-monopoly law case on May 11, 13, 15 and 18, 2015. At the May hearings, ZTE withdrew its claims alleging discriminatory treatment and the imposition of unfair trading conditions and increased its damages claim to 99.8 million RMB (approximately $15.4 million based on the exchange rate as of December 31, 2015). The Shenzhen Court held hearings in the FRAND case on July 29-31, 2015 and held a second hearing on the anti-monopoly law case on October 12, 2015. It is possible that the court may schedule further hearings in these cases before issuing its decisions.
LG Arbitration
On March 19, 2012, LG Electronics, Inc. filed a demand for arbitration against the Company’s wholly owned subsidiaries InterDigital Technology Corporation, IPR Licensing, Inc. and InterDigital Communications, LLC (now InterDigital Communications, Inc.) with the American Arbitration Association’s International Centre for Dispute Resolution (“ICDR”), initiating an arbitration in Washington, D.C. LG sought a declaration that it held a continuing license to certain technology owned by InterDigital under the parties’ patent license agreement dated January 1, 2006 (the “2006 LG PLA”). On April 18, 2012, InterDigital filed an Answering Statement objecting to the jurisdiction of the ICDR on the ground that LG’s claims are not arbitrable, and denying all claims made by LG in its demand for arbitration. The issue of whether LG’s claim to arbitrability is wholly groundless was appealed to the Federal Circuit. On June 7, 2013, the Federal Circuit issued an opinion holding that the USITC erred in terminating USITC Proceeding (337-TA-800) as to LG because “there is no plausible argument that the parties’ dispute in this case arose under their patent license agreement” and finding that “LG’s assertion of arbitrability was ‘wholly groundless.’” The Federal Circuit reversed the USITC’s order terminating the USITC proceeding as to LG and remanded to the USITC for further proceedings.
On June 25, 2013, the arbitration tribunal granted the parties’ joint request to stay the arbitration pending the exhaustion of all appellate rights from the Federal Circuit’s decision. As noted above, LG filed a petition for a writ of certiorari with the U.S. Supreme Court challenging the Federal Circuit’s ruling on December 31, 2013, and on April 21, 2014, the Supreme Court granted LG’s petition, vacating the underlying Federal Circuit decision and remanding the case to the Federal Circuit with instructions to dismiss the case as moot (in light of InterDigital’s decision to terminate the 337-TA-800 investigation as to LG).
On June 9, 2014, the arbitration tribunal lifted the temporary stay at the request of the parties. The arbitration tribunal held an evidentiary hearing on July 20-22, 2015 and a supplemental oral argument on October 19, 2015. On December 29, 2015, the arbitration tribunal issued its final award. Rejecting LG’s arguments, the arbitration tribunal found that LG’s license with respect to 3G products under the 2006 LG PLA had terminated as of December 31, 2010, at the expiration of the 2006 LG PLA’s five-year term, and that only LG’s paid-up license with respect to 2G-only products survived the expiration of the term. On February 5, 2016, InterDigital filed a petition in the District Court for the Southern District of New York for an order confirming the arbitration award.

25


Pegatron Actions
In first quarter 2015, we learned that on or about February 3, 2015, Pegatron Corporation (“Pegatron”), one of our licensees, filed a civil suit in Taiwan Intellectual Property Court against InterDigital, Inc. and certain of its subsidiaries alleging breach of the Taiwan Fair Trade Act (the “Pegatron Taiwan Action”). On May 26, 2015, InterDigital, Inc. received a copy of the civil complaint filed by Pegatron in the Taiwan Intellectual Property Court. The complaint named as defendants InterDigital, Inc. as well as InterDigital’s wholly owned subsidiaries InterDigital Technology Corporation and IPR Licensing, Inc. (together, for purposes of this discussion, “InterDigital”). The complaint alleged that InterDigital abused its market power by improperly setting, maintaining or changing the royalties Pegatron is required to pay under their 2008 patent license agreement (the “Pegatron PLA”), and engaging in unreasonable discriminatory treatment and other unfair competition activities in violation of the Taiwan Fair Trade Act. The complaint sought minimum damages in the amount of approximately $52 million, which amount could be expanded during the litigation, and that the court order multiple damages based on its claim that the alleged conduct was intentional. The complaint also sought an order requiring InterDigital to cease enforcing the royalty provisions of the Pegatron PLA, as well as all other conduct that allegedly violates the Fair Trade Act.
On June 5, 2015 InterDigital filed an Arbitration Demand with the American Arbitration Association’s International Centre for Dispute Resolution (“ICDR”) seeking declaratory relief denying all of the claims in Pegatron’s Taiwan Action and for breach of contract. On or about June 10, 2015, InterDigital filed a complaint in the United States District Court for the Northern District of California, San Jose Division (the “CA Northern District Court”) seeking a Temporary Restraining Order, Preliminary Injunction, and Permanent Anti-suit Injunction against Pegatron prohibiting Pegatron from prosecuting the Pegatron Taiwan Action. The complaint also seeks specific performance by Pegatron of the dispute resolution procedures set forth in the Pegatron PLA and compelling arbitration of the disputes in the Pegatron Taiwan Action. On June 29, 2015, the court granted InterDigital’s motion for a temporary restraining order and preliminary injunction requiring Pegatron to take immediate steps to dismiss the Taiwan Action without prejudice. On July 1, 2015, InterDigital was informed that Pegatron had withdrawn its complaint in the Taiwan Intellectual Property Court and that the case had been dismissed without prejudice.
On August 3, 2015, Pegatron filed an answer and counterclaims to InterDigital’s CA Northern District Court complaint. Pegatron accused InterDigital of violating multiple sections of the Taiwan Fair Trade Act, violating Section Two of the Sherman Act, breaching ETSI, IEEE, and ITU contracts, promissory estoppel (pled in the alternative), violating Section 17200 of the California Business & Professions Code, and violating the Delaware Consumer Fraud Act. These counterclaims stem from Pegatron’s accusation that InterDigital violated FRAND obligations. As relief, Pegatron seeks a declaration regarding the appropriate FRAND terms and conditions for InterDigital’s “declared essential patents,” a declaration that InterDigital’s standard essential patents are unenforceable due to patent misuse, an order requiring InterDigital to grant Pegatron a license on FRAND terms, an order enjoining InterDigital’s alleged ongoing breaches of its FRAND commitments, and damages in the amount of allegedly excess non-FRAND royalties Pegatron has paid to InterDigital, plus interest and treble damages. On August 7, 2015, Pegatron responded to InterDigital’s arbitration demand, disputing the arbitrability of Pegatron’s claims. On September 24, 2015, InterDigital moved to compel arbitration and dismiss Pegatron’s counterclaims or, in the alternative, stay the counterclaims pending the parties’ arbitration. Pegatron’s opposition to this motion was filed on October 22, 2015, and InterDigital’s reply was filed on November 12, 2015. On January 20, 2016, the court granted InterDigital’s motion to compel arbitration of Pegatron’s counterclaims and to stay the counterclaims pending the arbitrators’ determination of their arbitrability. On January 27, 2016, the parties stipulated to stay all remaining aspects of the CA Northern District case pending such an arbitrability determination. On the same day, the court granted the stay and administratively closed the case.
Microsoft Sherman Act Delaware Proceedings

On August 20, 2015, Microsoft Mobile, Inc. and MMO (collectively “Microsoft”) filed a complaint in the United States District Court for the District of Delaware against InterDigital, Inc., InterDigital Communications, Inc., InterDigital Technology Corporation, InterDigital Patent Holdings, Inc., InterDigital Holdings, Inc., and IPR Licensing, Inc. The complaint alleges that InterDigital has monopolized relevant markets for 3G and 4G cellular technology in violation of Section 2 of the Sherman Act. As relief, Microsoft seeks declaratory judgments that InterDigital has violated Section 2 of the Sherman Act, that “each of InterDigital’s U.S. patents declared by it to be Essential” to the 3G and 4G standards is unenforceable, and that all agreements InterDigital has entered into in furtherance of its alleged unlawful conduct are void. Microsoft also seeks an award of treble damages and the following injunctive relief: requiring InterDigital to grant Microsoft a non-confidential license to its U.S. standards essential patents (“SEPs”) on FRAND terms as determined by a court, requiring InterDigital to disclose to Microsoft the terms of its other SEP licenses, preventing InterDigital from enforcing any exclusion orders it might receive with respect to its SEPs, and requiring InterDigital to re-assign any declared SEPs that it has assigned to controlled entities.

On November 4, 2015, InterDigital filed a motion to dismiss and to strike Microsoft’s complaint. InterDigital asserts that Microsoft failed to (i) state a Sherman Act claim, (ii) adequately allege the essential elements of monopoly power and

26


exclusionary conduct, (iii) plead its fraud claims with specificity, and (iv) plead any cognizable antitrust injury. InterDigital also claimed that Microsoft’s complaint is barred by the Noerr-Pennington doctrine and that the court should strike Microsoft’s improper prayers for relief and damages arising prior to the applicable statute of limitations. A hearing on this motion is scheduled for March 1, 2016.
REGULATORY PROCEEDINGS
Investigation by Taiwan Fair Trade Commission
On December 6, 2013, InterDigital received notice from the Taiwan Fair Trade Commission (“TFTC”) that the TFTC had initiated an investigation to examine alleged anti-competitive behavior under Taiwan’s Fair Trade Act (FTA). Companies found to violate the FTA may be ordered to cease and rectify the unlawful conduct, take other necessary corrective action, and/or pay an administrative fine. InterDigital is fully cooperating with the TFTC’s investigation.
Investigation by National Development and Reform Commission of China
On September 23, 2013, counsel for InterDigital was informed by China’s National Development and Reform Commission (“NDRC”) that the NDRC had initiated a formal investigation into whether InterDigital has violated China’s Anti-Monopoly Law (“AML”) with respect to practices related to the licensing of InterDigital’s standards-essential patents to Chinese companies. Companies found to violate the AML may be subject to a cease and desist order, fines and disgorgement of any illegal gains. On March 3, 2014, the Company submitted to NDRC, pursuant to a procedure set out in the AML, a formal application for suspension of the investigation that included proposed commitments by the Company. On May 22, 2014, NDRC formally suspended its investigation of the Company based on the commitments proposed by the Company. The Company’s commitments with respect to the licensing of its patent portfolio for wireless mobile standards to Chinese manufacturers of cellular terminal units ("Chinese Manufacturers") are as follows:
1.
Whenever InterDigital engages with a Chinese Manufacturer to license InterDigital's patent portfolio for 2G, 3G and 4G wireless mobile standards, InterDigital will offer such Chinese Manufacturer the option of taking a worldwide portfolio license of only its standards-essential wireless patents, and comply with F/RAND principles when negotiating and entering into such licensing agreements with Chinese Manufacturers.
2. 
As part of its licensing offer, InterDigital will not require that a Chinese Manufacturer agree to a royalty-free, reciprocal cross-license of such Chinese Manufacturer's similarly categorized standards-essential wireless patents.
3. 
Prior to commencing any action against a Chinese Manufacturer in which InterDigital may seek exclusionary or injunctive relief for the infringement of any of its wireless standards-essential patents, InterDigital will offer such Chinese Manufacturer the option to enter into expedited binding arbitration under fair and reasonable procedures to resolve the royalty rate and other terms of a worldwide license under InterDigital's wireless standards-essential patents.  If the Chinese Manufacturer accepts InterDigital's binding arbitration offer or otherwise enters into an agreement with InterDigital on a binding arbitration mechanism, InterDigital will, in accordance with the terms of the arbitration agreement and patent license agreement, refrain from seeking exclusionary or injunctive relief against such company.
The commitments contained in item 3 above will expire five years from the effective date of the suspension of the investigation, or May 22, 2019.
USITC PROCEEDINGS AND RELATED DELAWARE DISTRICT COURT PROCEEDINGS
Nokia and ZTE 2013 USITC Proceeding (337-TA-868) and Related Delaware District Court Proceedings
USITC Proceeding (337-TA-868)
On January 2, 2013, the Company's wholly owned subsidiaries InterDigital Communications, Inc., InterDigital Technology Corporation, IPR Licensing, Inc. and InterDigital Holdings, Inc. filed a complaint with the United States International Trade Commission (the “USITC” or “Commission”) against Samsung Electronics Co., Ltd., Samsung Electronics America, Inc. and Samsung Telecommunications America, LLC, Nokia Corporation and Nokia Inc., Huawei Technologies Co., Ltd., Huawei Device USA, Inc. and FutureWei Technologies, Inc. d/b/a Huawei Technologies (USA) and ZTE Corporation and ZTE (USA) Inc. (collectively, the “337-TA-868 Respondents”), alleging violations of Section 337 of the Tariff Act of 1930 in that they engaged in unfair trade practices by selling for importation into the United States, importing into the United States and/or selling after importation into the United States certain 3G and 4G wireless devices (including WCDMA-, cdma2000- and LTE-capable mobile phones, USB sticks, mobile hotspots, laptop computers and tablets and components of such devices)

27


that infringe one or more of up to seven of InterDigital's U.S. patents. The complaint also extended to certain WCDMA and cdma2000 devices incorporating Wi-Fi functionality. InterDigital's complaint with the USITC sought an exclusion order that would bar from entry into the United States infringing 3G or 4G wireless devices (and components), including LTE devices, that are imported by or on behalf of the 337-TA-868 Respondents, and also sought a cease-and-desist order to bar further sales of infringing products that have already been imported into the United States. Certain of the asserted patents were also asserted against Nokia, Huawei and ZTE in earlier pending USITC proceedings (including the Nokia, Huawei and ZTE 2011 USITC Proceeding (337-TA-800) and the Nokia 2007 USITC Proceeding (337-TA-613), as set forth below) and therefore were not asserted against those 337-TA-868 Respondents in this investigation.
On December 23, 2013, InterDigital and Huawei reached a settlement agreement to enter into binding arbitration to resolve their global patent licensing disputes (see "Huawei Arbitration" below).  Pursuant to the settlement agreement, InterDigital and Huawei moved to dismiss all litigation matters pending between the parties except the action filed by Huawei in China to set a fair, reasonable and non-discriminatory (“FRAND”) rate for the licensing of InterDigital’s Chinese standards-essential patents (discussed below under “Huawei China Proceedings”), the decision in which InterDigital is permitted to further appeal. As a result, effective February 12, 2014, the Huawei Respondents were terminated from the 337-TA-868 investigation.
From February 10 to February 20, 2014, ALJ Essex presided over the evidentiary hearing in this investigation. The patents in issue in this investigation as of the hearing were U.S. Patent Nos. 7,190,966 (the “’966 patent”) and 7,286,847 (the “’847 patent”) asserted against ZTE and Samsung, and U.S. Patent No. 7,941,151 (the “’151 patent”) asserted against ZTE, Samsung and Nokia.
On June 3, 2014, InterDigital and Samsung filed a joint motion to terminate the investigation as to Samsung on the basis of settlement. The ALJ granted the joint motion by initial determination issued on June 9, 2014, and the USITC determined not to review the initial determination on June 30, 2014.
On June 13, 2014, the ALJ issued an Initial Determination (“ID”) in the 337-TA-868 investigation. In the ID, the ALJ found that no violation of Section 337 had occurred in connection with the importation of 3G/4G devices by ZTE or Nokia, on the basis that the accused devices do not infringe asserted claims 1-6, 8-9, 16-21 or 23-24 of the ’151 patent, claims 1, 3, 6, 8, 9, or 11 of the ’966 patent, or claims 3 or 5 of the ’847 patent. The ALJ also found that claim 16 of the ’151 patent was invalid as indefinite. Among other determinations, the ALJ further determined that InterDigital did not violate any FRAND obligations, a conclusion also reached by the ALJ in the 337-TA-800 investigation, and that Respondents have engaged in patent “hold out.”
On June 30, 2014, InterDigital filed a Petition for Review with the USITC seeking review and reversal of certain of the ALJ’s conclusions in the ID. On the same day, Respondents filed a Conditional Petition for Review urging alternative grounds for affirmance of the ID’s finding that Section 337 was not violated and a Conditional Petition for Review with respect to FRAND issues.
In June 2014, Microsoft Mobile Oy (“MMO”) was added as a respondent in the investigation.
On August 14, 2014, the Commission determined to review in part the June 13, 2014 ID but terminated the investigation with a finding of no violation.
On October 10, 2014, InterDigital filed a petition for review with the Federal Circuit, appealing certain of the adverse determinations in the Commission’s August 8, 2014 final determination including those related to the ’966 and ’847 patents. On June 2, 2015, InterDigital moved to voluntarily dismiss the Federal Circuit appeal, because, even if it were to prevail, it did not believe there would be sufficient time following the court’s decision and mandate for the USITC to complete its proceedings on remand such that the accused products would be excluded before the ’966 and ’847 patents expire in June 2016. The court granted the motion and dismissed the appeal on June 18, 2015.
Related Delaware District Court Proceedings
On January 2, 2013, the Company's wholly owned subsidiaries InterDigital Communications, Inc., InterDigital Technology Corporation, IPR Licensing, Inc. and InterDigital Holdings, Inc. filed four related district court actions in the United States District Court for the District of Delaware (the “Delaware District Court”) against the 337-TA-868 Respondents. These complaints allege that each of the defendants infringes the same patents with respect to the same products alleged in the complaint filed by InterDigital in USITC Proceeding (337-TA-868). The complaints seek permanent injunctions and compensatory damages in an amount to be determined, as well as enhanced damages based on willful infringement, and recovery of reasonable attorneys' fees and costs.

28


On January 24, 2013, Huawei filed its answer and counterclaims to InterDigital's Delaware District Court complaint. Huawei asserted counterclaims for breach of contract, equitable estoppel, waiver of right to enjoin and declarations that InterDigital has not offered or granted Huawei licenses on FRAND terms, declarations seeking the determination of FRAND terms and declarations of noninfringement, invalidity and unenforceability of the asserted patents. In addition to the declaratory relief specified in its counterclaims, Huawei seeks specific performance of InterDigital's purported contracts with Huawei and standards-setting organizations, appropriate damages in an amount to be determined at trial, reasonable attorneys' fees and such other relief as the court may deem appropriate.
On January 31, 2013, ZTE filed its answer and counterclaims to InterDigital's Delaware District Court complaint; ZTE asserted counterclaims for breach of contract, equitable estoppel, waiver of right to enjoin and declarations that InterDigital has not offered ZTE licenses on FRAND terms, declarations seeking the determination of FRAND terms and declarations of noninfringement, invalidity and unenforceability. In addition to the declaratory relief specified in its counterclaims, ZTE seeks specific performance of InterDigital's purported contracts with ZTE and standards-setting organizations, appropriate damages in an amount to be determined at trial, reasonable attorneys' fees and such other relief as the court may deem appropriate.    
On February 28, 2013, Nokia filed its answer and counterclaims to InterDigital's Delaware District Court complaint, and then amended its answer and counterclaims on March 5, 2013. Nokia asserted counterclaims for breach of contract, breach of implied contract, unfair competition under Cal. Bus. & Prof. Code § 17200, equitable estoppel, a declaration setting FRAND terms and conditions, a declaration that InterDigital is estopped from seeking an exclusion order based on its U.S. declared-essential patents, a declaration of patent misuse, a declaration that InterDigital has failed to offer FRAND terms, a declaration that Nokia has an implied license to the asserted patents, and declarations of non-infringement, invalidity and unenforceability. In addition to the declaratory relief specified in its counterclaims, Nokia seeks an order that InterDigital specifically perform its purported contracts by not seeking a USITC exclusion order for its essential patents and by granting Nokia a license on FRAND terms and conditions, an injunction preventing InterDigital from participating in a USITC investigation based on essential patents, appropriate damages in an amount to be determined, including all attorney’s fees and costs spent in participating in all three USITC Investigations (337-TA-868, 337-TA-800 and 337-TA-613), and any other relief as the court may deem just and proper.
On March 13, 2013, InterDigital filed an amended Delaware District Court complaint against Nokia and Samsung, respectively, to assert allegations of infringement of the recently issued '244 patent. On April 1, 2013, Nokia filed its answer and counterclaims to InterDigital’s amended Delaware District Court complaint. On April 24, 2013, Samsung filed its answer and a counterclaim to InterDigital's amended Delaware District Court complaint.
On March 21, 2013, pursuant to stipulation, the Delaware District Court granted InterDigital leave to file an amended complaint against Huawei and ZTE, respectively, to assert allegations of infringement of the '244 patent. On March 22, 2013, Huawei and ZTE filed their respective answers and counterclaims to InterDigital’s amended Delaware District Court complaint. On April 9, 2013, InterDigital filed a motion to dismiss Huawei’s and ZTE’s counterclaims relating to their FRAND allegations. On April 22, 2013, InterDigital filed a motion to dismiss Nokia’s counterclaims relating to its FRAND allegations. On July 12, 2013, the Delaware District Court held a hearing on InterDigital’s motions to dismiss. By order issued the same day, the Delaware District Court granted InterDigital’s motions, dismissing counterclaims for equitable estoppel, implied license, waiver of the right to injunction or exclusionary relief, and violation of California Bus. & Prof. Code § 17200 with prejudice. It further dismissed the counterclaims for breach of contract and declaratory relief related to InterDigital’s FRAND commitments with leave to amend.
On August 6, 2013, Huawei, Nokia, and ZTE filed answers and amended counterclaims for breach of contract and for declaratory judgments seeking determination of FRAND terms. The counterclaims also continue to seek declarations of noninfringement, invalidity, and unenforceability. Nokia also continued to assert a counterclaim for a declaration of patent misuse. On August 30, 2013, InterDigital filed a motion to dismiss the declaratory judgment counterclaims relating to the request for determination of FRAND terms. On May 28, 2014, the court granted InterDigital’s motion and dismissed defendants’ FRAND-related declaratory judgment counterclaims, ruling that such declaratory judgments would serve no useful purpose.
On December 30, 2013, InterDigital and Huawei filed a stipulation of dismissal on account of the confidential settlement agreement and agreement to arbitrate their disputes in this action. On the same day, the Delaware District Court granted the stipulation of dismissal.
On February 11, 2014, the Delaware District Court judge entered an InterDigital, Nokia, and ZTE stipulated Amended Scheduling Order that bifurcated issues relating to damages, FRAND-related affirmative defenses, and any FRAND-related counterclaims.

29


On August 28, 2014, the court granted in part a motion by InterDigital for summary judgment that the asserted ’151 patent is not unenforceable by reason of inequitable conduct, holding that only one of the references forming the basis of defendants’ allegations would remain in issue, and granted a motion by InterDigital for summary judgment that the asserted claims of the ’966 and ’847 patents are not invalid for lack of enablement.
On August 5, 2014, InterDigital and Samsung filed a stipulation of dismissal in light of the parties’ settlement agreement. On the same day, the court granted the stipulation of dismissal and dismissed the action with prejudice.
By order dated August 28, 2014, MMO was joined in the case as a defendant.
The ZTE trial addressing infringement and validity of the ‘966, ‘847, ‘244 and ‘151 patents was held from October 20 to October 27, 2014. During the trial, the judge determined that further construction of certain claim language of the ‘151 patent was required, and the judge decided to hold another trial as to ZTE's infringement of the '151 patent at a later date. On October 28, 2014, the jury returned a unanimous verdict in favor of InterDigital, finding that the ‘966, ‘847 and ‘244 patents are all valid and infringed by ZTE 3G and 4G cellular devices. The court issued formal judgment to this effect on October 29, 2014.
On November 26, 2014, ZTE filed a motion for judgment as a matter of law that the asserted claims of the '966, '847 and ’244 patents are not infringed and, in the alternative, for a new trial. InterDigital filed an opposition on December 15, 2014, and ZTE filed a reply on January 7, 2015. The motion is fully briefed and remains pending.
The ZTE trial addressing infringement of the ’151 patent was held from April 20 to April 22, 2015. On April 22, 2015, the jury returned a verdict in favor of ZTE, finding that the '151 patent is not infringed by ZTE 3G and 4G cellular devices.
On April 23, 2015, InterDigital filed a motion to partially dismiss its complaint pertaining to the '151 patent against Nokia and MMO, as well as Nokia and MMO's counterclaims that relate to the '151 patent (including inequitable conduct), and on April 27, 2015, the judge granted the motion.
On April 27, 2015, the court ruled that Nokia Corporation should be severed for a separate trial addressing infringement of the ’244 patent.
On May 5, 2015, the court scheduled the Nokia Inc./MMO jury trial addressing infringement of the ’244 patent for November 16, 2015. On May 29, 2015, the court entered a new scheduling order for damages and FRAND-related issues due to changes in the schedule of the liability portion of the MMO proceedings, scheduling trials related to damages and FRAND-related issues for October 2016 with ZTE and November 2016 with MMO.
On September 14, 2015, a panel of Administrative Law Judges of the United States Patent and Trademark Office Patent Trial and Appeal Board (the “PTAB”) issued a final written decision in two Inter Partes Review (“IPR”) cases concerning the’244 patent. These IPR proceedings were commenced on petitions filed by ZTE Corporation and ZTE (USA) Inc. and by Microsoft Corporation, respectively. Specifically, the panel determined that a number of claims of the ’244 patent are unpatentable as obvious. IPR Licensing, Inc. appealed to the U.S. Court of Appeals for the Federal Circuit seeking review of the PTAB’s decision. The appeals are pending. On October 13, 2015, by stipulation of the parties, the Delaware District Court stayed the action involving MMO and Nokia Inc., including the November 2015 and November 2016 trials concerning infringement of the ‘244 patent and damages and FRAND-related issues, respectively, pending completion of the IPR, including all appeals and subsequent proceedings before the PTAB. This stay is with respect to MMO and Nokia Inc. only, and does not apply to the Delaware action pending against ZTE.
On May 12, 2015, Nokia/MMO moved for summary judgment of non-infringement of the ’244 patent, alleging that the accused devices do not practice a particular claim element of the ’244 patent. On June 2, 2015, InterDigital opposed Nokia/MMO’s motion, and filed a cross-motion for partial summary judgment that the accused devices infringe the claim element at issue in Nokia/MMO’s motion for summary judgment. On October 13, 2015, the Delaware District Court denied the pending summary judgment cross-motions without prejudice in light of the stay discussed above, indicating that the motions could be considered refiled if and when the stay is lifted if either party requests it.
On December 21, 2015, the court entered another scheduling order that vacated the October 2016 date for the ZTE trial related to damages and FRAND-related issues as set forth in the May 2015 scheduling order. The parties will discuss a new schedule for the ZTE FRAND-related issues in a joint status report in March 2016.
Nokia and ZTE 2011 USITC Proceeding (337-TA-800) and Related Delaware District Court Proceeding

30


USITC Proceeding (337-TA-800)
On July 26, 2011, InterDigital's wholly owned subsidiaries InterDigital Communications, LLC (now InterDigital Communications, Inc.), InterDigital Technology Corporation and IPR Licensing, Inc. filed a complaint with the USITC against Nokia Corporation and Nokia Inc., Huawei Technologies Co., Ltd. and FutureWei Technologies, Inc. d/b/a Huawei Technologies (USA) and ZTE Corporation and ZTE (USA) Inc. (collectively, the “337-TA-800 Respondents”), alleging violations of Section 337 of the Tariff Act of 1930 in that they engaged in unfair trade practices by selling for importation into the United States, importing into the United States and/or selling after importation into the United States certain 3G wireless devices (including WCDMA- and cdma2000-capable mobile phones, USB sticks, mobile hotspots and tablets and components of such devices) that infringe several of InterDigital's U.S. patents. The action also extended to certain WCDMA and cdma2000 devices incorporating WiFi functionality. InterDigital's complaint with the USITC sought an exclusion order that would bar from entry into the United States any infringing 3G wireless devices (and components) that are imported by or on behalf of the 337-TA-800 Respondents, and also sought a cease-and-desist order to bar further sales of infringing products that have already been imported into the United States. In May 2012, Huawei Device USA, Inc. was added as a 337-TA-800 Respondent.
The ALJ held an evidentiary hearing from February 12-21, 2013. The patents in issue as of the hearing were U.S. Patent Nos. 8,009,636 (the “’636 patent”), 7,706, 830 (the “’830 patent”), 7,502,406 (the “’406 patent”), 7,616,970 (the “’970 patent”), 7,706,332 (the "‘332 patent"), 7,536,013 (the "‘013 patent") and 7,970,127 (the "‘127 patent"). The ALJ’s Initial Determination (“ID”) issued on June 28, 2013, finding no violation because the asserted patents were not infringed and/or invalid. Among other determinations, with respect to the 337-TA-800 Respondents’ FRAND and other equitable defenses, the ALJ found that Respondents had failed to prove either that InterDigital violated any FRAND obligations, that InterDigital failed to negotiate in good faith, or that InterDigital’s licensing offers were discriminatory. The ALJ also found that InterDigital is not precluded from seeking injunctive relief based on any alleged FRAND commitments.
Petitions for review of the ID to the Commission were filed by InterDigital and the 337-TA-800 Respondents on July 15, 2013. On September 4, 2013, the Commission determined to review the ID in its entirety.
On December 19, 2013, the Commission issued its final determination. The Commission adopted, with some modification, the ALJ’s finding of no violation of Section 337 as to Nokia, Huawei, and ZTE. The Commission did not rule on any other issue, including FRAND and domestic industry, and stated that all other issues remain under review.
On December 20, 2013, InterDigital filed in the Federal Circuit a petition for review seeking reversal of the Commission’s final determination. On February 18, 2015, the Federal Circuit issued a decision affirming the USITC’s determinations that the claims of the ’830, ’636, ’406 and ’332 patents were not infringed, that the claims of the ’970 patent are invalid, and that the Respondents did not violate Section 337. On April 6, 2015, InterDigital filed a combined petition for panel rehearing and rehearing en banc as to the ’830 and ’636 patents. The petition was denied on May 12, 2015, and the court’s mandate issued on May 19, 2015.
Related Delaware District Court Proceeding
On July 26, 2011, the same date that InterDigital filed USITC Proceeding (337-TA-800), it filed a parallel action in the United States District Court for the District of Delaware against the 337-TA-800 Respondents alleging infringement of the same asserted patents identified in USITC Proceeding (337-TA-800). The Delaware District Court complaint seeks a permanent injunction and compensatory damages in an amount to be determined, as well as enhanced damages based on willful infringement, and recovery of reasonable attorneys' fees and costs. On September 23, 2011, the defendants in the Delaware District Court complaint filed a motion to stay the Delaware District Court action pending the parallel proceedings in the USITC. Because the USITC has instituted USITC Proceeding (337-TA-800), the defendants have a statutory right to a mandatory stay of the Delaware District Court proceeding pending a final determination in the USITC. On October 3, 2011, InterDigital amended the Delaware District Court complaint, adding LG as a defendant and adding the same additional patent that InterDigital requested be added to USITC Proceeding (337-TA-800). On October 11, 2011, the Delaware District Court granted the defendants' motion to stay. The case is currently stayed through March 16, 2016.
On January 14, 2014, InterDigital and Huawei filed a stipulation of dismissal of their disputes in this action on account of the confidential settlement agreement mentioned above. On the same day, the Delaware District Court granted the stipulation of dismissal.
Nokia 2007 USITC Proceeding (337-TA-613), Related Delaware District Court Proceeding and Federal Circuit Appeal
USITC Proceeding (337-TA-613)

31


In August 2007, InterDigital filed a USITC complaint against Nokia Corporation and Nokia, Inc., alleging a violation of Section 337 of the Tariff Act of 1930 in that Nokia engaged in an unfair trade practice by selling for importation into the United States, importing into the United States and/or selling after importation into the United States certain 3G mobile handsets and components that infringe two of InterDigital's patents. In November and December 2007, a third patent and a fourth patent were added to the Company’s complaint against Nokia. The complaint sought an exclusion order barring from entry into the United States infringing 3G mobile handsets and components that are imported by or on behalf of Nokia. InterDigital’s complaint also sought a cease-and-desist order to bar further sales of infringing Nokia products that have already been imported into the United States.
On August 14, 2009, the ALJ overseeing USITC Proceeding (337-TA-613) issued an Initial Determination finding no violation of Section 337 of the Tariff Act of 1930. The Initial Determination found that InterDigital's patents were valid and enforceable, but that Nokia did not infringe these patents. In the event that a Section 337 violation were to be found by the Commission, the ALJ recommended the issuance of a limited exclusion order barring entry into the United States of infringing Nokia 3G WCDMA handsets and components, as well as the issuance of appropriate cease-and-desist orders.
On October 16, 2009, the Commission issued a notice that it had determined to review in part the Initial Determination, and that it affirmed the ALJ's determination of no violation and terminated the investigation. The Commission determined to review the claim construction of the patent claim terms “synchronize” and “access signal” and also determined to review the ALJ's validity determinations. On review, the Commission modified the ALJ's claim construction of “access signal” and took no position with regard to the claim term “synchronize” or the validity determinations. The Commission determined not to review the remaining issues decided in the Initial Determination.
On November 30, 2009, InterDigital filed with the Federal Circuit a petition for review of certain rulings by the USITC. In its appeal, InterDigital sought reversal of the Commission's claim constructions and non-infringement findings with respect to certain claim terms in the ’966 and ’847 patents, vacatur of the Commission's determination of no Section 337 violation and a remand for further proceedings before the Commission. On August 1, 2012, the Federal Circuit issued its decision in the appeal, holding that the Commission had erred in interpreting the claim terms at issue and reversing the Commission's finding of non-infringement. The Federal Circuit adopted InterDigital's interpretation of such claim terms and remanded the case back to the Commission for further proceedings. In addition, the Federal Circuit rejected Nokia's argument that InterDigital did not satisfy the domestic industry requirement. On September 17, 2012, Nokia filed a combined petition for rehearing by the panel or en banc with the Federal Circuit. On January 10, 2013, the Federal Circuit denied Nokia's petition.
On January 17, 2013, the Federal Circuit issued its mandate remanding USITC Proceeding (337-TA-613) to the Commission for further proceedings. On February 12, 2014, the Commission issued a notice, order and opinion remanding the investigation to an ALJ. In doing so, the Commission determined certain issues and identified others that would be subject to further proceedings by the ALJ. The Commission assigned the investigation to an ALJ for limited remand proceedings consistent with its February 12, 2014 opinion.
In June 2014, MMO was added as a respondent in the investigation.    
The evidentiary hearing in the remand proceeding was held January 26 - 28, 2015. On April 27, 2015, the ALJ issued his Remand Initial Determination (“RID”). The ALJ found that the imported accused handsets (1) contain chips that were not previously adjudicated and (2) infringe the asserted claims of the '966 and '847 patents, that there was no evidence of patent hold-up by InterDigital, that there is evidence of reverse hold-up by the respondents, and that the public interest does not preclude issuance of an exclusion order.
On May 11, 2015, Nokia Corporation and MMO each filed petitions to the Commission to review the RID. On June 25, 2015, the Commission issued a notice of its decision to review the RID in part. The Commission determined to review the RID’s findings concerning the application of the Commission’s prior construction of one claim limitation in Investigation Nos. 337-TA-800 and 337-TA-868, the RID’s findings as to whether the accused products satisfy that claim limitation, and the RID’s public interest findings. The Commission issued its final determination on August 28, 2015, finding that issue preclusion applied with respect to the construction of the claim limitations at issue, and issue preclusion also required a finding of non-infringement. The Commission determined there was no violation of Section 337 and terminated the 337-TA-613 investigation. The Commission found that consideration of the public interest issues was moot and did not address them.
Related Delaware District Court Proceeding
In addition, in August 2007, on the same date as the filing of USITC Proceeding (337-TA-613), InterDigital also filed a complaint in the Delaware District Court alleging that Nokia's 3G mobile handsets and components infringe the same two InterDigital patents identified in the original USITC complaint. The complaint seeks a permanent injunction and damages in an

32


amount to be determined. This Delaware action was stayed on January 10, 2008, pursuant to the mandatory, statutory stay of parallel district court proceedings at the request of a respondent in a USITC investigation. The Delaware District Court permitted InterDigital to add to the stayed Delaware action the third and fourth patents InterDigital asserted against Nokia in the USITC action.
Nokia Delaware Proceeding
In January 2005, Nokia filed a complaint in the Delaware District Court against InterDigital Communications Corporation (now InterDigital, Inc.) and its wholly owned subsidiary InterDigital Technology Corporation, alleging that InterDigital has used false or misleading descriptions or representations regarding the Company’s patents' scope, validity and applicability to products built to comply with 3G standards (the “Nokia Delaware Proceeding”). Nokia's amended complaint seeks declaratory relief, injunctive relief and damages, including punitive damages, in an amount to be determined. InterDigital subsequently filed counterclaims based on Nokia's licensing activities as well as Nokia's false or misleading descriptions or representations regarding Nokia's 3G patents and Nokia's undisclosed funding and direction of an allegedly independent study of the essentiality of 3G patents. InterDigital’s counterclaims seek injunctive relief as well as damages, including punitive damages, in an amount to be determined.
On December 10, 2007, pursuant to a joint request by the parties, the Delaware District Court entered an order staying the proceedings pending the full and final resolution of USITC Proceeding (337-TA-613). Specifically, the full and final resolution of USITC Proceeding (337-TA-613) includes any initial or final determinations of the ALJ overseeing the proceeding, the USITC and any appeals therefrom and any remand proceedings thereafter. Pursuant to the order, the parties and their affiliates are generally prohibited from initiating against the other parties, in any forum, any claims or counterclaims that are the same as the claims and counterclaims pending in the Nokia Delaware Proceeding, and should any of the same or similar claims or counterclaims be initiated by a party, the other parties may seek dissolution of the stay.
On November 24, 2015, InterDigital and Nokia voluntarily dismissed this case without prejudice to either party.    
Nokia Arbitration Concerning Presentations
In November 2006, InterDigital Communications Corporation (now InterDigital, Inc.) and its wholly owned subsidiary InterDigital Technology Corporation filed a request for arbitration with the International Chamber of Commerce against Nokia (the “Nokia Arbitration Concerning Presentations”), claiming that certain presentations Nokia has attempted to use in support of its claims in the Nokia Delaware Proceeding (described above) are confidential and, as a result, may not be used in the Nokia Delaware Proceeding pursuant to the parties' agreement.
The December 10, 2007 order entered by the Delaware District Court to stay the Nokia Delaware Proceeding also stayed the Nokia Arbitration Concerning Presentations pending the full and final resolution of USITC Proceeding (337-TA-613).
On November 24, 2015, InterDigital and Nokia jointly withdrew from this arbitration without prejudice to either party.

OTHER
We are party to certain other disputes and legal actions in the ordinary course of business, including arbitrations and legal proceedings with licensees regarding the terms of their agreements and the negotiation thereof. We do not currently believe that these matters, even if adversely adjudicated or settled, would have a material adverse effect on our financial condition, results of operations or cash flows. None of the above matters have met the requirements for accrual as of December 31, 2015.

Item 4.
MINE SAFETY DISCLOSURES.
Not applicable.

33


PART II
Item 5.
MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES.
Market Information
The NASDAQ Stock Market (“NASDAQ”) is the principal market for our common stock, which is traded under the symbol "IDCC." The following table sets forth the high and low sales prices of our common stock for each quarterly period in 2015 and 2014, as reported by NASDAQ.
2015
High
 
Low
First quarter
$
56.27

 
$
47.76

Second quarter
60.69

 
49.57

Third quarter
57.77

 
44.28

Fourth quarter
54.95

 
46.78

2014
High
 
Low
First quarter
$
33.60

 
$
26.25

Second quarter
49.10

 
31.45

Third quarter
48.93

 
39.40

Fourth quarter
54.90

 
38.64

Holders
As of February 16, 2016, there were 657 holders of record of our common stock.
Dividends
Cash dividends on outstanding common stock declared in 2015 and 2014 were as follows (in thousands, except per share data):
2015
Per Share
 
Total
 
Cumulative by Fiscal Year
First quarter
$
0.20

 
$
7,232

 
$
7,232

Second quarter
0.20

 
7,243

 
14,475

Third quarter
0.20

 
7,183

 
21,658

Fourth quarter
0.20

 
7,068

 
28,726

 
$
0.80

 
$
28,726

 
 
 
 
 
 
 
 
2014
 
 
 
 
 
First quarter
$
0.10

 
$
3,954

 
$
3,954

Second quarter
0.20

 
8,033

 
11,987

Third quarter
0.20

 
7,666

 
19,653

Fourth quarter
0.20

 
7,500

 
27,153

 
$
0.70

 
$
27,153

 
 
In June 2014, we announced that our Board of Directors had approved a 100% increase in the Company's quarterly cash dividend, to $0.20 per share. We currently expect to continue to pay dividends comparable to our quarterly $0.20 per share cash dividend in the future; however, continued payment of cash dividends and changes in the Company's dividend policy will depend on the Company's earnings, financial condition, capital resources and capital requirements, alternative uses of capital, restrictions imposed by any existing debt, economic conditions and other factors considered relevant by our Board of Directors.

34


Performance Graph
The following graph compares five-year cumulative total returns of the Company, the NASDAQ Composite Index and the NASDAQ Telecommunications Stock Index. The graph assumes $100 was invested in the common stock of InterDigital and each index as of December 31, 2010 and that all dividends were re-invested. Such returns are based on historical results and are not intended to suggest future performance.
COMPARISON OF 5-YEAR CUMULATIVE TOTAL RETURN
among InterDigital, Inc., the NASDAQ Composite Index and the NASDAQ Telecommunications Index
 
12/10
12/11
12/12
12/13
12/14
12/15
InterDigital, Inc. 
100.00
105.78
104.41
75.51
137.59
129.53
NASDAQ Composite
100.00
100.53
116.92
166.19
188.78
199.95
NASDAQ Telecommunications
100.00
89.84
91.94
128.06
133.34
128.91
                             
The above performance graph shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or incorporated by reference into any filing of InterDigital under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.
Issuer Purchases of Equity Securities
Repurchase of Common Stock
The following table provides information regarding Company purchases of its common stock during fourth quarter 2015.

35


    
Period
Total Number of Shares (or Units) Purchased (1)
 
Average Price Paid Per Share (or Unit)
 
Total Number of Shares (or Units) Purchases as Part of Publicly Announced Plans or Programs (2)
 
Maximum Number (or Approximate Dollar Value) of Shares (or Units) That May Yet Be Purchased Under the Plans or Programs (3)
October 1, 2015 - October 31, 2015
147,000

 
$
50.03

 
147,000

 
$
150,965,564

November 1, 2015 - November 30, 2015

 
$

 

 
$
150,965,564

December 1, 2015 - December 31, 2015

 
$

 

 
$
150,965,564

Total
147,000

 
$
50.03

 
147,000

 
$
150,965,564

                              
(1) Total number of shares purchased during each period reflects share purchase transactions that were completed (i.e., settled) during the period indicated.
(2) Shares were purchased pursuant to our $400.0 million share repurchase program (the “2014 Repurchase Program"), $300 million of which was authorized by the Company's Board of Directors on June 11, 2014 and announced on June 12, 2014 and $100 million of which was authorized by the Company's Board of Directors and announced on June 11, 2015. The 2014 Repurchase Program has no expiration date. The Company may repurchase shares under the 2014 Repurchase Program through open market purchases, pre-arranged trading plans, or privately negotiated purchases.
(3) Amounts shown in this column reflect the amounts remaining under the 2014 Repurchase Program.
In addition, from January 1, 2016 through February 17, 2016, we repurchased 0.6 million shares at a cost of $24.7 million under the 2014 Repurchase Program.
Item 6.
SELECTED FINANCIAL DATA.

The following data should be read in conjunction with the Consolidated Financial Statements, related Notes and other financial information contained in this Form 10-K.

36





 
2015
 
2014
 
2013
 
2012
 
2011
 
(in thousands except per share data)
Consolidated statements of operations data:
 

 
 

 
 

 
 

 
 

Revenues (a)
$
441,435

 
$
415,821

 
$
325,361

 
$
663,063

 
$
301,742

Income from operations (b)
$
208,549

 
$
168,960

 
$
84,756

 
$
419,030

 
$
134,757

Income tax provision (c)
$
(64,621
)
 
$
(52,108
)
 
$
(25,836
)
 
$
(136,830
)
 
$
(35,140
)
Net income applicable to InterDigital, Inc. common shareholders
$
119,225

 
$
104,342

 
$
38,165

 
$
271,804

 
$
89,468

Net income per common share — basic
$
3.31

 
$
2.65

 
$
0.93

 
$
6.31

 
$
1.97

Net income per common share — diluted
$
3.27

 
$
2.62

 
$
0.92

 
$
6.26

 
$
1.94

Weighted average number of common shares outstanding — basic
36,048

 
39,420

 
41,115

 
43,070

 
45,411

Weighted average number of common shares outstanding — diluted
36,463

 
39,879

 
41,424

 
43,396

 
46,014

Cash dividends declared per common share (d)
$
0.80

 
$
0.70

 
$
0.40

 
$
1.90

 
$
0.40

Consolidated balance sheets data:
 
 
 

 
 

 
 

 
 

Cash and cash equivalents
$
510,207

 
$
428,567

 
$
497,714

 
$
349,843

 
$
342,211

Short-term investments
423,501

 
275,361

 
200,737

 
227,436

 
335,783

Working capital
610,994

 
582,688

 
703,576

 
603,134

 
540,441

Total assets
1,474,485

 
1,192,962

 
1,110,251

 
1,052,374

 
991,430

Total debt
486,769

 
216,206

 
205,881

 
196,156

 
187,171

Total InterDigital, Inc. shareholders’ equity
510,519

 
468,328

 
528,650

 
518,705

 
471,682

Noncontrolling interest
11,376

 
7,349

 
5,170

 

 

Total shareholders’ equity
$
521,895

 
$
475,677

 
$
533,820

 
$
518,705

 
$
471,682

                              

(a)
In 2015, our revenues included $65.8 million in past sales primarily related to new patent license and settlement agreements. In 2014, our revenues included $125.0 million in past sales primarily related to new patent license agreements. In 2013, our revenues included $127.0 million of past sales primarily related to arbitration awards. In 2012, our revenues included $384 million associated with patent sales.
(b)
Our income from operations included charges of $1.5 million and $12.5 million in 2013 and 2012, respectively, associated with actions to reposition the company’s operations.
(c)
In 2014, our income tax provision included the impact of a $4.2 million net tax benefit, primarily attributable to available U.S. federal research and development tax credits, which was partially offset by an audit settlement. In 2012, our income tax provision included a tax benefit of $6.7 million related to the release of valuation allowances on deferred tax assets, which we now expect to utilize. In 2011, our income tax provision included benefits of $6.8 million related to the favorable resolution of tax contingencies and $1.5 million associated with after-tax interest income on tax refunds.
(d)
In June 2014, we announced that our Board of Directors had approved a 100% increase in the Company's quarterly cash dividend, to $0.20 per share. On December 5, 2012, we announced that our Board of Directors had declared a special cash dividend of $1.50 per share on InterDigital common stock. The special cash dividend was payable on December 28, 2012 to stockholders of record as of the close of business on December 17, 2012.

Item 7.
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

OVERVIEW
The following discussion should be read in conjunction with the Selected Financial Data, the Consolidated Financial Statements and the Notes thereto contained in this Form 10-K.

37


Throughout the following discussion and elsewhere in this Form 10-K, we refer to “recurring revenues” and “past sales.”  Recurring revenues are comprised of “current patent royalties” and “current technology solutions revenue.”  Past sales are comprised of “past patent royalties” and “past technology solutions revenue.”
Business
InterDigital designs and develops advanced technologies that enable and enhance wireless communications and capabilities. Since our founding in 1972, our engineers have designed and developed a wide range of innovations that are used in digital cellular and wireless products and networks, including 2G, 3G, 4G and IEEE 802-related products and networks. We are a leading contributor of intellectual property to the wireless communications industry.
Given our long history and focus on advanced research and development, InterDigital has one of the most significant patent portfolios in the wireless industry. As of December 31, 2015, InterDigital's wholly owned subsidiaries held a portfolio of approximately 20,400 patents and patent applications related to a range of technologies including the fundamental technologies that enable wireless communications. In that portfolio are a number of patents and patent applications that we believe are or may be essential or may become essential to cellular and other wireless standards, including 3G, 4G and the IEEE 802 suite of standards, as well as patent applications that we believe may become essential to 5G standards that are under development. That portfolio has largely been built through internal development, supplemented by joint development projects with other companies as well as select patent acquisitions. Products incorporating our patented inventions include: mobile devices, such as cellular phones, tablets, notebook computers and wireless personal digital assistants; wireless infrastructure equipment, such as base stations; and components, dongles and modules for wireless devices.
InterDigital derives revenues primarily from patent licensing and sales, technology solutions licensing and sales and engineering services. In 2015, 2014, and 2013, our total revenues were $441.4 million, $415.8 million and $325.4 million, respectively. Our recurring revenues in 2015, 2014, and 2013 were $372.8 million, $288.8 million and $198.3 million, respectively.
In 2015, the amortization of fixed-fee royalty payments accounted for approximately 35% of our recurring revenues. These fixed-fee revenues are not affected by the related licensees’ success in the market or the general economic climate. The majority of the remaining portion of our recurring revenue is variable in nature due to the per-unit structure of the related license agreements. Approximately 79% of this per-unit, variable portion for 2015 related to sales by our collection of Taiwanese licensees, the majority of which revenue was derived from the sale of Apple products.
Revenue
Recurring revenue in 2015 of $372.8 million increased 29% from the prior year. This $84.0 million year-over-year increase in recurring revenue was primarily driven by an increase in per-unit royalties driven by increased shipments by Pegatron, as well as an increase in fixed-fee revenues. The increase in fixed-fee revenues was primarily attributable to a full year of revenue amortization for new agreements signed in 2014, which was partially offset by the absence of revenue from patent license agreements that expired during 2014.
Additionally, during 2015, we recognized $68.7 million of past sales revenue, primarily attributable to the new patent license agreements and settlement agreements discussed below, as compared to $125.0 million recognized in 2014. The 2014 past sales amount was primarily attributable to revenue recognized as a result of new patent license agreements.
Refer to "Results of Operations -- 2015 Compared with 2014" for further discussion of our 2015 revenue.
New Agreements and Settlements
During second quarter 2015, we entered into a settlement agreement with Arima Communications Corporation ("Arima"). The agreement maintains the existing patent license agreement and resolves all pending payment disputes between the companies. In addition, the agreement resulted in the dismissal of all current litigations and arbitrations between the companies in all jurisdictions. We recognized $27.2 million of past patent royalties related to this settlement.
During third quarter 2015, we entered into a new patent license agreement with Sony (the "new Sony PLA"). In addition, we renewed our joint venture with Sony, Convida Wireless, to continue investments in the development of IoT technologies and expanded it to include development efforts in 5G technologies. As discussed more fully in Note 14, "Variable Interest Entities," Convida Wireless is a variable interest entity and is consolidated within our financial statements.
Our agreement with Sony is a multiple-element arrangement for accounting purposes, which includes, among other elements, the new Sony PLA. The new Sony PLA covers the sale by Sony of covered products for the three-year period that commenced on December 1, 2015. In addition, the new Sony PLA covers Sony's covered product sales that occurred during certain prior periods and that were not covered under our prior agreement with Sony. We recognized past sales of $21.8 million from this agreement in third quarter 2015, and are recognizing future revenue from the new Sony PLA on a straight-line basis

38


over its term. A portion of the consideration received was in the form of patents. Refer to Note 2, " Summary of Significant Accounting Policies ," for additional information related to the estimates and methods used to determine the fair value of the patents acquired.
During fourth quarter 2015, we entered into a new worldwide, non-exclusive, royalty bearing patent license agreement with Kyocera. Our agreement with Kyocera is a multiple-element arrangement for accounting purposes. The agreement covers Kyocera's sale of certain cellular terminal unit products. We recognized $16.4 million of past patent royalties related to this settlement during fourth quarter 2015. A portion of the consideration received was in the form of patents. Refer to Note 2, "Summary of Significant Accounting Policies," for additional information related to the estimates and methods used to determine the fair value of the patents acquired.
Additionally, during fourth quarter 2015, we entered into a settlement agreement with a technology solutions customer. The agreement resolves all pending payment disputes between the parties. We recognized $2.8 million of past technology solutions revenue, $1.8 million of interest income, a $0.5 million reversal of a bad debt reserve and $0.4 million of contra-expenses related to this settlement.
Huawei Arbitration
In December 2013, InterDigital and Huawei reached a settlement agreement to enter into binding arbitration to resolve their global patent licensing dispute. Pursuant to their agreement, InterDigital and Huawei initiated an arbitration in April 2014 jointly seeking a determination by an arbitral tribunal of FRAND royalty terms and conditions to be included in a binding worldwide patent license agreement to take effect upon issuance of the arbitration award. An arbitration hearing was held in January 2015, and the arbitration panel delivered a confidential partial award in May 2015 and a confidential final award in July 2015. In July 2015, InterDigital filed a petition in the District Court for the Southern District of New York for an order confirming the arbitration award (the “New York Proceeding”), and Huawei filed an action in the Paris Court of Appeal requesting annulment of the arbitration award (the “Paris Proceeding”). Huawei also filed a motion to stay the New York Proceeding pending the Paris Proceeding. A hearing in the New York Proceeding was held on February 16, 2016. On February 17, 2016, the judge notified the parties that he had rendered a decision on Huawei’s motion to stay the New York Proceeding, finding that the New York Proceeding should be stayed pending the Paris Proceeding, subject to a requirement that Huawei post suitable security, pursuant to Article VI of the New York Convention, in the amount of the final award, together with interest.  The stay is subject to revision should circumstances change, and InterDigital can renew its petition for an order confirming the award after the outcome of the Paris Proceeding is determined. A hearing is scheduled in the Paris Proceeding for March 2016.
To date, Huawei has not made any payments under the arbitration award. We will recognize any related revenue in the period in which the amount of revenue is fixed or determinable and collectability is reasonably assured.
Please see Part I, Item 3, of this Form 10-K for a fuller discussion of these proceedings.    
Expiration of Patent License Agreements
Our patent license agreements with a number of licensees are scheduled to expire during 2016. Collectively, these agreements accounted for $19.7 million, or approximately 4%, of our total revenue in 2015. Individually, none of these agreements accounted for more than 2% of our total revenue in 2015.
Subsequent Event
We anticipate a severance charge in the range of $1.5 million to $2.0 million during first quarter 2016 related to ongoing efforts to optimize our cost structure.
Cash and Short-Term Investments
At December 31, 2015, we had $933.7 million of cash and short-term investments and up to an additional $472.3 million of payments due under signed agreements, including $53.9 million recorded in accounts receivable that is due within twelve months of the balance sheet date. A substantial portion of our cash and short-term investments relates to fixed and prepaid royalty payments we have received that relate to future sales of our licensees’ products. As a result, our future cash receipts from existing licenses subject to fixed and prepaid royalties will be lower than if the royalty payments were structured to coincide with the underlying sales. During 2015, we recorded $408.0 million of cash receipts related to patent licensing and technology solutions agreements as follows (in thousands):

39


 
Cash In
Current royalties
$
223,270

Fixed-fee royalty payments
135,027

Past per-unit patent royalties
24,766

Prepaid royalties
13,460

Technology solutions
7,145

Past technology solutions
3,300

Past fixed royalty payments
1,057

 
$
408,025

Approximately $212.9 million of our $395.3 million deferred revenue balance relates to fixed-fee royalty payments that are scheduled to amortize as follows (in thousands):
2016
$
106,229

2017
98,881

2018
3,909

2019
1,392

2020
1,392

Thereafter
1,068

 
$
212,871

The remaining $182.4 million of deferred revenue primarily relates to prepaid royalties that will be recorded as revenue as our licensees report their sales of covered products.
Repurchase of Common Stock
In May 2012, our Board of Directors authorized a share repurchase program, which was then expanded in June 2012 to increase the amount of the program from $100 million to $200 million (the "2012 Repurchase Program"). Of the $200 million authorized under the 2012 Repurchase Program, $106.8 million was utilized prior to the termination of the program in June 2014. In June 2014, our Board of Directors authorized a new share repurchase program, which was expanded in June 2015 to increase the amount of the program from $300 million to $400 million (the “2014 Repurchase Program"). We may repurchase shares under the 2014 Repurchase Program through open market purchases, pre-arranged trading plans or privately negotiated purchases.
The table below sets forth for the periods presented the number of shares repurchased and the dollar value of shares repurchased under the 2012 Repurchase Program and the 2014 Repurchase Program, in thousands.
 
2012 Repurchase Program
 
2014 Repurchase Program
 
Total Both Programs
 
# of Shares
 
Value
 
# of Shares
 
Value
 
# of Shares
 
Value
2015


$


1,836


$
96,410


1,836

 
$
96,410

2014




3,554


152,625


3,554

 
152,625

2013
917


29,135






917

 
29,135

Prior to 2013
2,552


77,694






2,552

 
77,694

Total
3,469


$
106,829


5,390


$
249,035


8,859

 
$
355,864

In addition, from January 1, 2016 through February 17, 2016, we repurchased 0.6 million shares at a cost of $24.7 million under the 2014 Repurchase Program.
Intellectual Property Rights Enforcement
If we believe any party is required to license our patents in order to manufacture and sell certain products and such party refuses to do so, we may agree with such party to have royalty rates, or other terms, set by third party adjudicators (such

40


as arbitrators) or, in certain circumstances, we may institute legal action against them to enforce our patent rights. This legal action typically takes the form of a patent infringement lawsuit or an administrative proceeding. In addition, we and our licensees, in the normal course of business, might seek to resolve disagreements between the parties with respect to the rights and obligations of the parties under the applicable license agreement through arbitration or litigation.
In 2015, our intellectual property enforcement costs decreased to $31.8 million from $52.1 million and $75.0 million in 2014 and 2013, respectively. This represented 26% of our 2015 total patent administration and licensing costs of $120.4 million. Intellectual property enforcement costs will vary depending upon activity levels, and it is likely they will continue to be a significant expense for us in the future.
Comparability of Financial Results
When comparing 2015 financial results against the financial results of other periods, the following items should be taken into consideration:
Our 2015 revenue includes:
$65.8 million of past sales primarily related to the new patent license and settlement agreements; and
$2.9 million of past technology solutions revenue primarily related to the settlement with a technology solutions customer discussed above.
Our 2015 operating expenses include:
$8.0 million of expense to increase accrual rates for some of our incentive compensation plans; and
$0.9 million of contra-expenses associated with the reversal of a bad debt reserve and reimbursement of legal fees related to the settlement with a technology solutions customer discussed above.
Our 2015 other expense includes:
$1.8 million of interest income related to the settlement with a technology solutions customer discussed above.
Our 2015 income tax provision includes:
an approximately $2.1 million net tax benefit, primarily attributable to available U.S. federal research and development tax credits.
Critical Accounting Policies and Estimates
Our consolidated financial statements are based on the selection and application of accounting principles generally accepted in the United States of America (“GAAP”), which require us to make estimates and assumptions that affect the amounts reported in both our consolidated financial statements and the accompanying notes. Future events and their effects cannot be determined with absolute certainty. Therefore, the determination of estimates requires the exercise of judgment. Actual results could differ from these estimates and any such differences may be material to the financial statements. Our significant accounting policies are described in Note 2 to our Consolidated Financial Statements and are included in Item 8 of Part II of this Form 10-K. We believe the accounting policies that are of particular importance to the portrayal of our financial condition and results and that may involve a higher degree of complexity and judgment in their application compared to others are those relating to revenue recognition, compensation and income taxes. If different assumptions were made or different conditions existed, our financial results could have been materially different.

41


Revenue Recognition
We derive the vast majority of our revenue from patent licensing. The timing and amount of revenue recognized from each licensee depends upon a variety of factors, including the specific terms of each agreement and the nature of the deliverables and obligations. Such agreements are often complex and include multiple elements. These agreements can include, without limitation, elements related to the settlement of past patent infringement liabilities, up-front and non-refundable license fees for the use of patents and/or know-how, patent and/or know-how licensing royalties on covered products sold by licensees, cross-licensing terms between us and other parties, the compensation structure and ownership of intellectual property rights associated with contractual technology development arrangements, advanced payments and fees for service arrangements and settlement of intellectual property enforcement. For agreements entered into or materially modified prior to 2011, due to the inherent difficulty in establishing reliable, verifiable, and objectively determinable evidence of the fair value of the separate elements of these agreements, the total revenue resulting from such agreements has often been recognized over the performance period. Beginning in January 2011, all new or materially modified agreements are being accounted for under the Financial Accounting Standards Board ("FASB") revenue recognition guidance, "Revenue Arrangements with Multiple Deliverables." This guidance requires consideration to be allocated to each element of an agreement that has stand alone value using the relative fair value method. In other circumstances, such as those agreements involving consideration for past and expected future patent royalty obligations, after consideration of the particular facts and circumstances, the appropriate recording of revenue between periods may require the use of judgment. In all cases, revenue is only recognized after all of the following criteria are met: (1) written agreements have been executed; (2) delivery of technology or intellectual property rights has occurred or services have been rendered; (3) fees are fixed or determinable; and (4) collectibility of fees is reasonably assured.
We establish a receivable for payments expected to be received within twelve months from the balance sheet date based on the terms in the license. Our reporting of such payments often results in an increase to both accounts receivable and deferred revenue. Deferred revenue associated with fixed-fee royalty payments is classified on the balance sheet as short-term when it is scheduled to be amortized within twelve months from the balance sheet date. All other deferred revenue is classified as long-term, as amounts to be recognized over the next twelve months are not known.
Patent License Agreements
Upon signing a patent license agreement, we provide the licensee permission to use our patented inventions in specific applications. We account for patent license agreements in accordance with the guidance for revenue arrangements with multiple deliverables. We have elected to utilize the leased-based model for revenue recognition, with revenue being recognized over the expected period of benefit to the licensee. Under our patent license agreements, we typically receive one or a combination of the following forms of payment as consideration for permitting our licensees to use our patented inventions in their applications and products:
Consideration for Past Patent Royalties:  Consideration related to a licensee’s product sales from prior periods may result from a negotiated agreement with a licensee that utilized our patented inventions prior to signing a patent license agreement with us or from the resolution of a disagreement or arbitration with a licensee over the specific terms of an existing license agreement. We may also receive consideration for past patent royalties in connection with the settlement of patent litigation where there was no prior patent license agreement. In each of these cases, we record the consideration as revenue when we have obtained a signed agreement, identified a fixed or determinable price and determined that collectibility is reasonably assured.
Fixed-Fee Royalty Payments:  These are up-front, non-refundable royalty payments that fulfill the licensee’s obligations to us under a patent license agreement for a specified time period or for the term of the agreement for specified products, under certain patents or patent claims, for sales in certain countries, or a combination thereof — in each case for a specified time period (including for the life of the patents licensed under the agreement). We recognize revenues related to Fixed-Fee Royalty Payments on a straight-line basis over the effective term of the license. We utilize the straight-line method because we cannot reliably predict in which periods, within the term of a license, the licensee will benefit from the use of our patented inventions.
Prepayments:  These are up-front, non-refundable royalty payments towards a licensee’s future obligations to us related to its expected sales of covered products in future periods. Our licensees’ obligations to pay royalties typically extend beyond the exhaustion of their Prepayment balance. Once a licensee exhausts its Prepayment balance, we may provide them with the opportunity to make another Prepayment toward future sales or it will be required to make Current Royalty Payments.
Current Royalty Payments:  These are royalty payments covering a licensee’s obligations to us related to its sales of covered products in the current contractual reporting period.
Licensees that either owe us Current Royalty Payments or have Prepayment balances are obligated to provide us with quarterly royalty reports that summarize their sales of covered products and their related royalty obligations to us. We typically

42


receive these royalty reports subsequent to the period in which our licensees’ underlying sales occurred. As a result, it is impractical for us to recognize revenue in the period in which the underlying sales occur, and, in most cases, we recognize revenue in the period in which the royalty report is received and other revenue recognition criteria are met due to the fact that without royalty reports from our licensees, our visibility into our licensees’ sales is very limited. When a licensee is required to gross-up their royalty payment to cover applicable foreign withholding tax requirements, the additional consideration is recorded as revenue.
The exhaustion of Prepayments and Current Royalty Payments are often calculated based on related per-unit sales of covered products. From time to time, licensees will not report revenues in the proper period, most often due to legal disputes. When this occurs, the timing and comparability of royalty revenue could be affected. In cases where we receive objective, verifiable evidence that a licensee has discontinued sales of products covered under a patent license agreement with us, we recognize any related deferred revenue balance in the period that we receive such evidence.
Patent Sales
During 2012, we expanded our business strategy of monetizing our intellectual property to include the sale of select patent assets. As patent sales executed under this strategy represent a component of our ongoing major or central operations and activities, we will record the related proceeds as revenue. We will recognize the revenue when there is persuasive evidence of a sales arrangement, fees are fixed or determinable, delivery has occurred and collectibility is reasonably assured. These requirements are generally fulfilled upon closing of the patent sale transaction.
Technology Solutions and Engineering Services
Technology solutions revenue consists primarily of revenue from royalty payments. We recognize revenue from royalty payments using the same methods described above under our policy for recognizing revenue from patent license agreements. Technology solutions revenues also consist of revenues from software licenses and engineering services. Software license revenues are recognized in accordance with the original and revised guidance for software revenue recognition. When the arrangement with a customer includes significant production, modification, or customization of the software, we recognize the related revenue using the percentage-of-completion method in accordance with the accounting guidance for construction-type and certain production-type contracts. Under this method, revenue and profit are recognized throughout the term of the contract, based on actual labor costs incurred to date as a percentage of the total estimated labor costs related to the contract. Changes in estimates for revenues, costs and profits are recognized in the period in which they are determinable. When such estimates indicate that costs will exceed future revenues and a loss on the contract exists, a provision for the entire loss is recognized at that time.
We recognize revenues associated with engineering service arrangements that are outside the scope of the accounting guidance for construction-type and certain production-type contracts on a straight-line basis, unless evidence suggests that the revenue is earned in a different pattern, over the contractual term of the arrangement or the expected period during which those specified services will be performed, whichever is longer. In such cases we often recognize revenue using proportional performance and measure the progress of our performance based on the relationship between incurred labor hours and total estimated labor hours or other measures of progress, if available. Our most significant cost has been labor and we believe both labor hours and labor cost provide a measure of the progress of our services. The effect of changes to total estimated contract costs is recognized in the period such changes are determined.     
Multiple Element Arrangements
During 2015, we signed three agreements that were considered multiple-element arrangements for accounting purposes. In accordance with our revenue recognition policy, we identified each element of the arrangement, estimated its relative fair value for purposes of allocating the arrangement consideration and determined when each of those elements should be recognized. Using the accounting guidance applicable to multiple-element revenue arrangements, we allocated the consideration to each element for accounting purposes using our best estimate of the term and value of each element. The development of a number of these inputs and assumptions in the model requires a significant amount of management judgment and is based upon a number of factors, including the assumed royalty rates, sales volumes, discount rate and other relevant factors. Changes in any of a number of these assumptions could have had a substantial impact on the relative fair value assigned to each element for accounting purposes. These inputs and assumptions represent management's best estimates at the time of the transactions.
The impact that a five percent change to the allocation of past patent royalties under these three agreements would have had on 2015 revenue is summarized in the following table (in thousands):

43


 
Change in estimate
Allocation to past patent royalties

+5%
 
-%5
Change in Revenue
$
6,330

 
$
(6,330
)
Revenue from Non-financial Sources

During 2015, 2014, and 2013, our patent licensing royalties were derived from patent license agreements ("PLAs") with 24, 25, and 21 independent licensees, respectively. During 2015, 2014 and 2013, we recognized revenue from four PLAs, two PLAs and one PLA, respectively, for which patents comprised less than one-third of the total consideration paid or due to us under those agreements. In addition, during 2015 and 2014, we recognized revenue from one PLA that was executed in 2014 in connection with a patent purchase agreement ("PPA") with the licensee. Total cash paid or due to our licensee under this PPA is approximately 56% of the total cash due to us under this licensee's PLA. During 2015, 2014, and 2013, approximately 5%, 7%, and 3%, respectively, of our total revenue was based on the estimated fair value of the patents in the above transactions. We estimated the fair value of the patents in the above transactions by a combination of a discounted cash flow analysis (the income approach) and an analysis of comparable market transactions (the market approach). For the income approach, the inputs and assumptions used to develop these estimates were based on a market participant perspective and included estimates of projected royalties, discount rates, economic lives and income tax rates, among others. For the market approach, judgment was applied as to which market transactions were most comparable to this transaction. The development of a number of these inputs and assumptions requires a significant amount of management judgment and is based upon a number of factors, including the selection of industry comparables, assumed royalty rates, sales volumes, economic lives of the patents and other relevant factors. Changes in any of a number of these assumptions could have had a substantial impact on the fair value assigned to the patents for accounting purposes. These inputs and assumptions represent management's best estimates at the time of the transaction. The impact that a five percent change in the estimated value of the patents would have had on 2015 revenue, patent amortization and pre-tax income is summarized in the following table (in thousands):
 
Change in estimate
Value of patents acquired in connection with PLAs
+5%
 
-%5
Revenue
$
1,105

 
$
(1,105
)
Less: Patent amortization
493

 
(493
)
Pre-tax income
$
612

 
$
(612
)
Compensation Programs
We use a variety of compensation programs to both attract and retain employees, and to more closely align employee compensation with company performance. These programs include, but are not limited to, short-term incentive awards tied to performance goals and cash awards to inventors for filed patent applications and patent issuances, as well as stock option awards, time-based restricted stock unit (“RSU”) awards and performance-based awards under our long-term compensation program ("LTCP"). Our LTCP typically includes annual grants with a three-year vesting period; as a result, in any one year, we are typically accounting for three active LTCP cycles.
The aggregate amount of performance compensation expense we record in a period, under both short-term and long-term performance compensation programs, requires the input of subjective assumptions and is a function of our estimated progress toward performance compensation goals at the beginning of the period, and our estimated progress or final assessment of progress toward performance compensation goals at the end of the period. Our estimated progress toward goals under performance equity grants is based on meeting a minimum confidence level in accordance with accounting rules for share-based compensation. Achievement rates can vary by performance cycle and from period to period, resulting in variability in our compensation expense.
If we had accrued all performance compensation cost throughout 2015 on the assumption that all plans would be paid out at 100%, we would have recorded $5.6 million less in compensation expense in 2015 than we actually recorded. There are two LTCP cycles that will carry over into 2016, for which if we record the performance-based incentive components at current accrual rates during 2016, we estimate that we will record $4.9 million in incentive-based compensation for those cycles in 2016.
We account for compensation costs associated with share-based transactions based on the fair value of the instruments issued, net of any estimated award forfeitures. This requires us to make subjective assumptions around the value of the equity

44


at the time of issuance and the expected forfeiture rates, which in both cases are generally based on historical experience. The estimated value of stock options includes assumptions around expected life, stock volatility, and dividends. The expected life of our stock option awards are based on the simplified method as prescribed by Staff Accounting Bulletin Topic 14. In all periods, our policy has been to set the value of RSUs and restricted stock awards equal to the value of our underlying common stock on the date of measurement. For grants with graded vesting, we amortize the associated unrecognized compensation cost using an accelerated method. For grants that cliff vest, we amortize the associated unrecognized compensation cost on a straight-line basis over their vesting term. In 2006, we adopted the short-cut method to establish the historical additional paid-in-capital pool (“APIC Pool”) related to the tax effects of employee share-based compensation. Any positive balance would be available to absorb tax shortfalls (which occur when the tax deductions resulting from share-based compensation are less than the related book expense) recognized subsequent to the adoption of the stock-based compensation guidance.
The below table summarizes our performance-based and other share-based compensation expense for 2015, 2014 and 2013, in thousands:

2015
 
2014
 
2013
 
Short-term incentive compensation
$
19,098

 
$
20,404

 
$
10,550

 
Time-based awards (d)
7,874

 
6,734

 
4,641

 
Performance-based awards (d)
5,340

(a)
8,947

(b)
7,260

(c)
Other share-based compensation
2,090

 
2,814

 
4,039

 
Total performance-based and other share-based compensation expense
$
34,402

 
$
38,899

 
$
26,490

 
                             
(a) Included in 2015 is a charge of $1.1 million to increase the accrual rates under our LTCP driven by the Company's success toward achieving goals for the related cycles.
(b) Included in 2014 is a charge of $4.8 million to increase the accrual rates under our LTCP driven by the Company's success toward achieving goals for the related cycles.
(c) Included in 2013 is a charge of $6.5 million to increase the accrual rates under our LTCP driven by the Company's success toward achieving goals for the related cycles.
(d) A portion of the 2015 expense relates to cash awards. All expense for 2014 and 2013 relates to equity awards.
Income Taxes
Income taxes are accounted for under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the Consolidated Statement of Income in the period that includes the enactment date. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets if management has determined that it is more likely than not that such assets will not be realized.
In addition, the calculation of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex tax laws. We are subject to examinations by the Internal Revenue Service (“IRS”) and other taxing jurisdictions on various tax matters, including challenges to various positions we assert in our filings. In the event that the IRS or another taxing jurisdiction levies an assessment in the future, it is possible the assessment could have a material adverse effect on our consolidated financial condition or results of operations.
The financial statement recognition of the benefit for a tax position is dependent upon the benefit being more likely than not to be sustainable upon audit by the applicable tax authority. If this threshold is met, the tax benefit is then measured and recognized at the largest amount that is greater than 50 percent likely of being realized upon ultimate settlement. In the event that the IRS or another taxing jurisdiction levies an assessment in the future, it is possible the assessment could have a material adverse effect on our consolidated financial condition or results of operations.
Between 2006 and 2015, we paid approximately $295.1 million in foreign taxes for which we have claimed foreign tax credits against our U.S. tax obligations. Of this amount, $195.3 million relates to taxes paid to foreign governments that have tax treaties with the U.S. It is possible that as a result of tax treaty procedures, the U.S. government may reach an agreement with the related foreign governments that will result in a partial refund of foreign taxes paid with a related reduction in our foreign tax credits. Due to both foreign currency fluctuations and differences in the interest rate charged by the

45


U.S. government compared to the interest rates, if any, used by the foreign governments, any such agreement could result in net interest expense and/or foreign currency gain or loss.     
During 2015, we estimated a research and development credit for the 2015 period that resulted in an approximately $2.1 million tax benefit net of any unrecognized tax benefits. During 2014, we completed the research and development credit studies for the periods from 2010 to 2013 and amended our United States federal income tax returns for the periods from 2010 through 2012 to claim the research and development credit for those periods. After all periods were amended and the 2013 federal income tax return was filed, we recognized a net benefit after consideration of any unrecognized tax benefits from the tax credits in the amount of $5.7 million. Additionally, in 2014, we recognized a benefit after consideration of any unrecognized tax benefits of $0.9 million for the estimated research and development credit for 2014. In addition, in 2014, we recorded $0.7 million of unrecognized tax benefits related to other matters.
New Accounting Guidance
Accounting Standards Update: Balance Sheet Classification of Deferred Taxes     
In November 2015, as part of their simplification initiative, the FASB issued amendments to guidance for reporting deferred taxes. According to the revised standard, an entity will be required to present deferred tax assets and deferred tax liabilities as noncurrent in a classified balance sheet. Under current guidance, entities separate deferred tax assets and deferred tax liabilities as current or noncurrent based on the classification of the related asset or liability for financial reporting. The guidance is effective for interim and annual periods beginning on or after December 15, 2016 but early adoption is permitted. We elected to early adopt this guidance effective fourth quarter 2015, and we retrospectively applied the change within our Consolidated Balance Sheets included in this Annual Report on Form 10-K. The impact of this change to our December 31, 2014 Consolidated Balance Sheet was a reduction of $54.0 million to current deferred tax assets and a corresponding increase of $54.0 million to noncurrent deferred tax assets.  See Note 2, Summary of Significant Accounting Policies, for further information on our deferred tax assets.
Accounting Standards Update: Debt Issuance Costs     
In March 2015, as part of their simplification initiative, the FASB issued amendments to guidance for reporting debt issuance costs. According to the revised standard, an entity will recognize debt issuance costs as a direct deduction from the debt liability as opposed to an asset. The costs will continue to be amortized and included within interest expense in the entity's financial statements. The guidance is effective for interim and annual periods beginning on or after December 15, 2015 but early adoption is permitted. We elected to early adopt this guidance effective first quarter 2015, and we retrospectively applied the change within our Consolidated Balance Sheets included in this Annual Report on Form 10-K. The impact of this change to our December 31, 2014 Consolidated Balance Sheet was a reduction of $1.3 million and a reduction of $0.3 million to Prepaid and other current assets and Other non-current assets, respectively, and a corresponding $1.6 million reduction to Long-term debt.  See Note 2, Summary of Significant Accounting Policies, for further information on our debt issuance costs.
Accounting Standards Update: Consolidation
In February 2015, the FASB issued ASU No. 2015-2, “Consolidation (Topic 820): Amendments to the Consolidation Analysis.” ASU 2015-2 provides a revised consolidation model for all reporting entities to use in evaluating whether they should consolidate certain legal entities. All legal entities will be subject to reevaluation under this revised consolidation model. The revised consolidation model, among other things, (i) modifies the evaluation of whether limited partnerships and similar legal entities are voting interest entities, or VIEs, (ii) eliminates the presumption that a general partner should consolidate a limited partnership and (iii) modifies the consolidation analysis of reporting entities that are involved with VIEs through fee arrangements and related party relationships. ASU 2015-2 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2015. We are still evaluating what impact, if any, this ASU will have on our consolidated financial position, results of operations or cash flows.
Accounting Standards Update: Revenue Recognition
In May 2014, the FASB issued guidance on revenue from contracts with customers that will supersede most current revenue recognition guidance, including industry-specific guidance. The underlying principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The guidance provides a five-step analysis of transactions to determine when and how revenue is recognized. Other major provisions include capitalization of certain contract costs, consideration of time value of money in the transaction price, and allowing estimates of variable consideration to be recognized before contingencies are resolved in certain circumstances. The guidance also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from an entity’s contracts with customers. The guidance is effective for the interim and annual periods beginning on or after December 15, 2017 (early adoption is permitted as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within those annual periods). The guidance permits the

46


use of either a retrospective or cumulative effect transition method. We have not yet selected a transition method. We are currently evaluating the effect that adopting this guidance will have on our financial position, results of operations and cash flows.
Legal Proceedings
We are routinely involved in disputes associated with enforcement and licensing activities regarding our intellectual property, including litigations, arbitrations and other proceedings. These litigations, arbitrations and other proceedings are important means to enforce our intellectual property rights. We are a party to other disputes and legal actions not related to our intellectual property, but also arising in the ordinary course of our business. Refer to Part I, Item 3, of this Form 10-K for a description of our material legal proceedings.
FINANCIAL POSITION, LIQUIDITY AND CAPITAL RESOURCES
Our primary sources of liquidity are cash, cash equivalents and short-term investments, as well as cash generated from operations. We believe we have the ability to obtain additional liquidity through debt and equity financings. Based on our past performance and current expectations, we believe our available sources of funds, including cash, cash equivalents and short-term investments and cash generated from our operations, will be sufficient to finance our operations, capital requirements, our debt obligations (including the repayment of our $230 million aggregate principal amount of 2.50% senior convertible notes due in March 2016 (the "2016 Notes")), existing stock repurchase program and dividend program for the next twelve months.
On March 11, 2015, we completed an offering of $316.0 million in aggregate principal amount of 1.50% Senior Convertible Notes due 2020 (the "2020 Notes," and together with the 2016 Notes, the "Notes"). The net proceeds from the offering were approximately $306.7 million, after deducting the initial purchasers' discount, commissions and offering expenses. A portion of the net proceeds from the offering was used to fund the cost of the convertible note hedge transactions entered into in connection with the offering of the 2020 Notes. We also used $43.6 million of the remaining net proceeds to repurchase shares of our common stock concurrently with the pricing of the offering of the 2020 Notes. We expect to use the remaining net proceeds from the offering for general corporate purposes, which may include, among other things, the repurchase or retirement of our other outstanding indebtedness.
Cash, cash equivalents and short-term investments
At December 31, 2015 and December 31, 2014, we had the following amounts of cash, cash equivalents and short-term investments (in thousands):
 
December 31, 2015
 
December 31, 2014
 
Increase /
(Decrease)
Cash and cash equivalents
$
510,207

 
$
428,567

 
$
81,640

Short-term investments
423,501

 
275,361

 
148,140

Total cash and cash equivalents and short-term investments
$
933,708

 
$
703,928

 
$
229,780

The increase in cash, cash equivalents and short-term investments was primarily attributable to the net proceeds of $306.7 million from the offering of the 2020 Notes discussed above and $114.5 million of cash provided by operating activities. These increases were partially offset by the cost of repurchasing common stock of $96.4 million, $49.8 million in capital investments, including capitalized patent costs and patent acquisitions, dividend payments of $28.9 million and a net cost of $16.5 million for the bond hedge and warrant transactions.
Cash flows from operations
We generated the following cash flows from our operating activities in 2015 and 2014 (in thousands):
 
For the Year Ended December 31,
 
2015
 
2014
 
Increase / (Decrease)
Cash flows provided by operating activities
$
114,499

 
$
242,013

 
$
(127,514
)
Our cash flows provided by operating activities are principally derived from cash receipts from patent license and technology solutions agreements offset by cash operating expenses and income tax payments. The decrease in cash flows provided by operating activities of $127.5 million was primarily attributable to a decrease in cash receipts of $152.6 million. The decrease is attributable to higher cash receipts in 2014 due to new agreements signed in that year, partially offset by higher

47


current royalties in 2015 from existing licensees, primarily Pegatron and our other Taiwan-based licensees. This decrease in cash receipts was partially offset by a decrease in cash outflows of $44.6 million primarily due to income taxes paid and lower cash operating expenses. Additionally, other working capital adjustments contributed $19.5 million to the decrease, primarily due to payment of accrued compensation. The table below provides the significant items comprising our cash flows provided by operating activities during the years ended December 31, 2015 and 2014 (in thousands).
 
For the Year Ended December 31,
 
2015
 
2014
 
Increase / (Decrease)
Cash Receipts:
 
 
 
 
 
Fixed-fee royalty payments a
$
136,084

 
$
389,000

 
$
(252,916
)
Current royalties b
223,270

 
155,432

 
67,838

Prepaid royalties c
38,226

 
2,500

 
35,726

Technology solutions
10,445

 
11,649

 
(1,204
)
Patent sales

 
1,999

 
(1,999
)
Total cash receipts
$
408,025

 
$
560,580

 
$
(152,555
)
 
 
 
 
 
 
Cash Outflows:
 
 
 
 
 
Cash operating expenses d
(169,954
)
 
(185,421
)
 
15,467

Income taxes paid e
(85,780
)
 
(114,876
)
 
29,096

Total cash outflows
(255,734
)
 
(300,297
)
 
44,563

 
 
 
 
 
 
Other working capital adjustments
(37,792
)
 
(18,270
)
 
(19,522
)
 
 
 
 
 
 
Cash flows provided by operating activities
$
114,499

 
$
242,013

 
$
(127,514
)
                             
(a) Fixed-fee royalty payments for the years ended December 31, 2015 and 2014 include $1.1 million and $118.4 million, respectively, of cash receipts recognized as past sales revenue.
(b) Current patent royalty payments for the year ended December 31, 2014 include $3.7 million of cash receipts recognized as past sales revenue.
(c) Prepaid patent royalty payments for the year ended December 31, 2015 include $24.8 million of cash receipts recognized as past sales revenue.
(d) Cash operating expenses include operating expenses less depreciation of fixed assets, amortization of patents, and non-cash compensation.
(e) Income taxes paid include foreign withholding taxes.
Working capital
We believe that working capital, adjusted to exclude cash, cash equivalents, short-term investments and current deferred revenue provides additional information about non-cash assets and liabilities that might affect our near-term liquidity. While we believe cash and short-term investments are important measures of our liquidity, the remaining components of our current assets and current liabilities, with the exception of deferred revenue, could affect our near-term liquidity and/or cash flow. We have no material obligations associated with our deferred revenue, and the amortization of deferred revenue has no impact on our future liquidity and or cash flow. Our adjusted working capital, a non-GAAP financial measure, reconciles to working capital, the most directly comparable GAAP financial measure, at December 31, 2015 and December 31, 2014 (in thousands) as follows:

48


 
For the Year Ended December 31,
 
2015
 
2014
 
Increase / (Decrease)
Current assets
$
1,010,967

 
$
787,857

 
$
223,110

Less: current liabilities
399,973

 
205,169

 
194,804

Working capital
610,994

 
582,688

 
28,306

Subtract:
 
 
 
 
 
Cash and cash equivalents
510,207

 
428,567

 
81,640

Short-term investments
423,501

 
275,361

 
148,140

Add:
 
 
 
 
 
Current deferred revenue
106,229

 
124,695

 
(18,466
)
Adjusted working capital
$
(216,485
)
 
$
3,455

 
$
(219,940
)
The $219.9 million decrease in adjusted working capital in 2015 compared to 2014 is primarily attributable to the reclassification of $227.2 million from long-term to short-term debt related to the 2016 Notes, partially offset by a decrease in accounts payable of $15.7 million. The decrease in accounts payable was primarily due to the payment of a final installment on a 2014 patent purchase.
Cash used in or provided by investing and financing activities
We used net cash in investing activities of $214.0 million and $140.3 million, respectively, in 2015 and 2014. We purchased $147.9 million and $75.0 million, net of sales, of short-term marketable securities in 2015 and 2014, respectively. The change was primarily due to higher cash balances as a result of the issuance of the 2020 Notes and new agreements signed during 2014 and 2015 as discussed above. Investment costs associated with capitalized patent costs and acquisition of patent costs decreased to $49.8 million in 2015 from $58.2 million in 2014, primarily due to a decreased investment in patent acquisitions in 2015. Additionally, we made strategic investments of $12.6 million in 2015.
Net cash provided by financing activities increased by $352.0 million in 2015 primarily due to the net proceeds of $306.7 million from the issuance and sale of the 2020 Notes, a decrease in repurchases of common stock of $56.2 million, an increase in other financing activities of $6.5 million and an increase in proceeds from non-controlling interests of $4.3 million, partially offset by $16.5 million of net costs for the bond hedge and warrant transactions and an increase in dividend payments of $5.2 million.
Other
Our combined short-term and long-term deferred revenue balance at December 31, 2015 was approximately $395.3 million, a decrease of $22.8 million from December 31, 2014. We have no material obligations associated with such deferred revenue. The decrease in deferred revenue was primarily due to $163.4 million of deferred revenue recognized, which was partially offset by a gross increase in deferred revenue of $114.0 million, primarily associated with the new agreements discussed above. Also included within our deferred revenue balance at December 31, 2015 was $26.6 million of non-cash consideration received in conjunction with the new patent license agreements signed during 2015. This deferred revenue recognized was comprised of $131.8 million of amortized fixed-fee royalty payments and $31.6 million in per-unit exhaustion of prepaid royalties (based upon royalty reports provided by our licensees).
Based on current license agreements, we expect the amortization of fixed-fee royalty payments to reduce the December 31, 2015 deferred revenue balance of $395.3 million by $106.2 million over the next twelve months. Additional reductions to deferred revenue over the next twelve months will be dependent upon the level of per-unit royalties our licensees report against prepaid balances.
Contractual Obligations
    On April 4, 2011, InterDigital entered into an indenture by and between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee, pursuant to which the 2016 Notes were issued. The 2016 Notes bear interest at a rate of 2.50% per year, payable in cash on March 15 and September 15 of each year, commencing September 15, 2011. The Notes will mature on March 15, 2016, unless earlier converted or repurchased.

49


On March 11, 2015, InterDigital entered into an indenture, by and between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee, pursuant to which the 2020 Notes were issued. The 2020 Notes bear interest at a rate of 1.50% per year, payable in cash on March 1 and September 1 of each year, commencing September 1, 2015, and mature on March 1, 2020, unless earlier converted or repurchased.
For more information on the Notes, see Note 6, “Obligations,” in the Notes to Consolidated Financial Statements included in Part II, Item 8, of this Form 10-K.     
The following table summarizes our contractual obligations as of December 31, 2015 (in thousands):
 
Payments Due by Period
 
Total
 
Less Than
1 year
 
1-3 Years
 
3-5 Years
 
Thereafter
2016 Notes
$
230,000

 
$
230,000

 
$

 
$

 
$

2020 Notes
316,000

 

 

 
316,000

 

Contractual interest payments on the Notes
24,205

 
7,615

 
9,480

 
7,110

 

Operating lease obligations
22,925

 
4,186

 
6,091

 
4,868

 
7,781

Purchase obligations (a)
25,200

 
25,200

 

 

 

Total contractual obligations
$
618,330

 
$
267,001

 
$
15,571

 
$
327,978

 
$
7,781

                             
        
(a)
Purchase obligations consist of agreements to purchase goods and services that are legally binding on us, as well as accounts payable. Our consolidated balance sheet at December 31, 2015 includes a $1.5 million noncurrent liability for uncertain tax positions. The future payments related to uncertain tax positions have not been presented in the table above due to the uncertainty of the amounts and timing of cash settlement with the taxing authorities.
Off-Balance Sheet Arrangements
We do not have any off-balance sheet arrangements as defined by Item 303(a)(4) of Regulation S-K.
RESULTS OF OPERATIONS
2015 Compared with 2014
Revenues
The following table compares 2015 revenues to 2014 revenues (in thousands):
 
For the Year Ended December 31,
 
 
 
2015
 
2014
 
(Decrease)/Increase
Per-unit royalty revenue
$
234,836

 
$
157,250

 
$
77,586

 
49
 %
Fixed-fee amortized royalty revenue
131,837

 
121,903

 
9,934

 
8
 %
Current patent royalties a
366,673

 
279,153

 
87,520

 
31
 %
Past patent royalties b
65,814

 
124,236

 
(58,422
)
 
(47
)%
Total patent licensing royalties
432,487

 
403,389

 
29,098

 
7
 %
Patent sales

 
1,999

 
(1,999
)
 
100
 %
Current technology solutions revenue a
6,096

 
9,633

 
(3,537
)
 
(37
)%
Past technology solutions revenue b
2,852

 
800

 
2,052

 
257
 %
Total revenue
$
441,435

 
$
415,821

 
$
25,614

 
6
 %
                             
a.     Recurring revenues consist of current patent royalties and current technology solutions revenue.
b.      Past sales consist of past patent royalties and past technology solutions revenue.

The $25.6 million increase in total revenue was primarily attributable to the $87.5 million increase in current patent royalties. The increase of per-unit royalty revenue of $77.6 million was primarily related to increased shipments by Pegatron and other Taiwan-based licensees. The $9.9 million increase in fixed-fee amortized royalty revenue was primarily attributable

50


to new patent license agreements signed during second quarter 2014. The increase in total revenue was also partially attributable to an increase in past technology solutions revenue of $2.1 million related to the settlement agreement signed during 2015, as discussed above. These increases were partially offset by a decrease of $58.4 million in past patent royalties. The decrease in past sales was primarily related to three new patent license agreements signed during second quarter 2014, partially offset by past sales in the current year period attributable to the new agreements discussed above. Additionally, current technology solutions revenue decreased by $3.5 million primarily due to decreased shipments of covered products by one of our technology solutions customers. Patent sales decreased by $2.0 million due to the absence of any patent sales in 2015.
    In 2015 and 2014, 61% and 51% of our total revenues, respectively, were attributable to companies that individually accounted for 10% or more of our total revenues. In 2015 and 2014, the following licensees or customers accounted for 10% or more of our total revenues:

For the Year Ended December 31,
 
2015

2014
Pegatron a
31%

18%
Samsung b
16%

33%
Sony c
14%
 
< 10%
a. We are engaged in a legal dispute with Pegatron, a Taiwan-based company, regarding, among other things, the terms of our patent license agreement, and we are the subject of an investigation by the Taiwan Fair Trade Commission.  See Note 8, “Litigation and Legal Proceedings,” in the Notes to Condensed Consolidated Financial Statements in Item 8 of this Form 10-K.
b. 2014 revenues include $86.3 million of past patent royalties.
c. 2015 revenues include $21.9 million of past patent royalties.

Operating Expenses
The following table summarizes the change in operating expenses by category (in thousands):
 
For the Year Ended December 31,
 
 
 
2015
 
2014
 
Increase/(Decrease)
Patent administration and licensing
$
120,401

 
$
133,808

 
$
(13,407
)
 
(10
)%
Development
72,702

 
75,300

 
(2,598
)
 
(3
)%
Selling, general and administrative
39,783

 
37,753

 
2,030

 
5
 %
Total operating expenses
$
232,886

 
$
246,861

 
$
(13,975
)
 
(6
)%
Operating expenses decreased 6% to $232.9 million in 2015 from $246.9 million in 2014. The $14.0 million decrease in total operating expenses was primarily due to (decreases)/increases in the following items (in thousands):
 
(Decrease)/
Increase
Intellectual property enforcement and non-patent litigation
$
(19,572
)
Performance-based incentive compensation
(4,165
)
Consulting services
(1,022
)
Cost of patent sales
(700
)
Personnel-related costs
(634
)
Bad debt expense
(392
)
Other
(86
)
Depreciation and amortization
5,675

Commercial initiatives
6,921

Total decrease in operating expenses
$
(13,975
)

51


The $14.0 million decrease in operating expenses was primarily attributable to the $19.6 million decrease in intellectual property enforcement and non-patent litigation primarily related to decreased costs associated with the USITC actions, which was partially offset by costs associated with licensee arbitrations. The $4.2 million decrease in performance-based incentive compensation, including both short-term and long-term compensation, was primarily attributable to higher accrual rate true-ups in 2014 as a result of new license agreements signed during 2014. The $1.0 million decrease in consulting services primarily resulted from a reduction in the use of external resources for research and development projects. The $0.7 million decrease in cost of patent sales was due to the absence of patent sales in 2015. Personnel-related costs decreased $0.6 million primarily due to a prior year adjustment related to payroll taxes and employment level tax credits, primarily as a result of an ongoing audit. Bad debt expense decreased $0.4 million as a result of the settlement agreement with the technology solutions customer signed during 2015, as discussed above. The $5.7 million increase in depreciation and amortization was primarily due to patent acquisitions made during the past two years, along with the organic annual growth of our patent portfolio. The $6.9 million increase in commercial initiatives expense was attributable to activities to commercialize IoT and next generation networks technologies.
Patent administration and licensing expense:  The $13.4 million decrease in patent administration and licensing expense primarily resulted from the above-noted decreases in intellectual property enforcement and performance-based incentive compensation, partially offset by increases in patent amortization and patent maintenance and evaluation costs primarily related to the increased growth of the patent portfolio due to patents acquired pursuant to the new agreements as discussed above.
Development expense:  The $2.6 million decrease in development expense was primarily attributable to the above-noted decreases in performance-based incentive compensation, consulting services and personnel costs, partially offset by an increase in costs related to commercial initiatives as described above. 
Selling, general and administrative expense:  The $2.0 million increase in selling, general and administrative expense was primarily attributable to increases in personnel-related costs and consulting services primarily related to corporate and commercial initiatives.
Other (Expense) Income
The following table compares 2015 other (expense) income to 2014 other (expense) income (in thousands):
 
For the Year Ended December 31,
 
 
 
 
 
2015
 
2014
 
(Decrease)/Increase
Interest expense
$
(30,417
)
 
$
(16,084
)
 
$
(14,333
)
 
89
%
Interest and investment income
3,858

 
1,399

 
2,459

 
176
%
Other a
(975
)
 
(747
)
 
(228
)
 
31
%
 
$
(27,534
)
 
$
(15,432
)
 
$
(12,102
)
 
78
%
                            
(a) Includes other-than-temporary impairments.
The change in other expenses is primarily driven by the increase in interest expense resulting from the 2020 Notes issued during first quarter 2015, partially offset by $1.8 million of interest income related to the settlement agreement with a technology solutions customer, as discussed above.  
Income Taxes
In 2015, our effective tax rate was approximately 35.7% as compared to 33.9% in 2014, based on the statutory federal tax rate net of discrete federal and state taxes. The increase in the effective tax rate from 2014 to 2015 resulted primarily from the 2014 net benefit received from research and development tax credits covering the periods 2010 through 2014. The inclusion of additional periods in 2014 accounted for a 2.7% lower effective tax rate in 2014. This benefit in 2014 was partially offset by a 1% effective tax rate increase resulting from higher audit settlements in 2014.
2014 Compared with 2013

52


Revenues
The following table compares 2014 revenues to 2013 revenues (in thousands):
 
For the Year Ended
December 31,
 
 
 
 
 
2014
 
2013
 
Increase/ (Decrease)
Per-unit royalty revenue
$
157,250

 
$
122,709

 
$
34,541

 
28
 %
Fixed-fee amortized royalty revenue
121,903

 
67,658

 
54,245

 
80
 %
Current patent royalties a
279,153

 
190,367

 
88,786

 
47
 %
Past patent royalties b
124,236

 
73,808

 
50,428

 
68
 %
Total patent licensing royalties
403,389

 
264,175

 
139,214

 
53
 %
Patent sales
1,999

 

 
1,999

 
100
 %
Current technology solutions revenue a
9,633

 
7,960

 
1,673

 
21
 %
Past technology solutions revenue b
800

 
53,226

 
(52,426
)
 
(98
)%
Total revenue
$
415,821

 
$
325,361

 
$
90,460

 
28
 %
a.     Recurring revenues consist of current patent royalties and current technology solutions revenue.
b.     Past sales consist of past patent royalties and past technology solutions revenue.
The $90.5 million increase in total revenue was primarily attributable to the $88.8 million increase in current patent royalties and a $50.4 million increase in past patent royalties. New patent license agreements signed during 2014 contributed $186.1 million in total to the increased fixed-fee and past patent royalties. These increases were partially offset by a decrease of $13.6 million in fixed-fee amortized royalty revenue related to agreements that have expired or were terminated in 2014, and past patent royalties in 2013 included approximately $71.4 million recognized as a result of arbitration awards received in 2013. Additionally, per-unit royalty revenue increased $34.5 million, and was primarily related to a $49.8 million increase associated with increased shipments by, and the coverage of additional products under, our agreement with Pegatron. This increase in per-unit royalties from Pegatron was partially offset by a total decrease of $15.3 million attributable to certain of our other per-unit licensees with concentrations in the smartphone market. Current technology solutions revenue increased by $1.7 million primarily due to the inclusion of royalties on certain products upon the resolution in 2013 of our arbitration with Intel Mobile Communications GmbH ("Intel"). These increases were partially offset by a decrease in past technology solutions revenue of $52.4 million, primarily due to revenue that was recognized in 2013 as a result of the award received upon the resolution of the Intel arbitration.

In 2014 and 2013, 51% and 60% of our total revenues, respectively, were attributable to companies that individually accounted for 10% or more of our total revenues. In 2014 and 2013, the following licensees or customers accounted for 10% or more of our total revenues:
 
For the Year Ended December 31,
 
2014
 
2013
Samsung a
33%
 
—%
Pegatron b
18%
 
30%
Intel c
< 10%
 
18%
Sony
< 10%
 
12%
                             
(a) 2014 revenues include $86.3 million of past patent royalties.
(b) 2013 revenues include $71.4 million of past patent royalties.
(c) 2013 revenues include $53.3 million of past technology solutions revenue.

53


Operating Expenses
The following table summarizes the change in operating expenses by category (in thousands):
 
For the Year Ended December 31,
 
 
 
 
 
2014
 
2013
 
Increase/(Decrease)
Patent administration and licensing
$
133,808

 
$
143,037

 
$
(9,229
)
 
(6
)%
Development
75,300

 
64,729

 
10,571

 
16
 %
Selling, general and administrative
37,753

 
31,295

 
6,458

 
21
 %
Repositioning

 
1,544

 
(1,544
)
 
(100
)%
Total operating expenses
$
246,861

 
$
240,605

 
$
6,256

 
3
 %
Operating expenses increased 3% to $246.9 million in 2014 from $240.6 million in 2013. The $6.3 million increase in total operating expenses was primarily due to increases/(decreases) in the following items (in thousands):
 
Increase/
(Decrease)
Performance-based incentive compensation
$
13,441

Depreciation and amortization
8,490

Consulting services
4,603

Commercial initiatives and Signal Trust
4,460

Personnel-related costs
1,844

Cost of patent sales
700

Other
120

Patent maintenance and evaluation
(2,963
)
Intellectual property enforcement
(22,895
)
Total decrease in operating expenses not including repositioning charge
7,800

Repositioning charge
(1,544
)
Total decrease in operating expenses
$
6,256

The $13.4 million increase in performance-based incentive compensation, including both short-term and long-term compensation, was primarily attributable to both a true-up to increase the beginning period compensation to the current accrual rate and higher accrual rates in 2014 as compared to significantly lower accrual rates in 2013. The $8.5 million increase in depreciation and amortization was primarily due to patent acquisitions made during the past two years, along with the organic annual growth of our patent portfolio. The $4.6 million increase in consulting services was primarily related to the support of research and development projects and corporate initiatives that have ramped up during 2014. The $4.5 million increase in commercial initiatives and Signal Trust expense was related to a new commercial initiative launched in 2014 and the Signal Trust, which was created in fourth quarter 2013. Personnel-related costs increased $1.8 million primarily due to hiring activity during 2014. The $0.7 million increase in cost of patent sales was related to patents sold during 2014, and represents the remaining net book value of the patents sold. The $3.0 million decrease in patent maintenance and evaluation costs was primarily related to decreased due diligence costs associated with both patent acquisition and patent sale activities. The $22.9 million decrease in intellectual property enforcement and non-patent litigation primarily related to decreased costs associated with the USITC actions and licensee arbitrations.
Patent administration and licensing expense:   The $9.2 million decrease in patent administration and licensing expense primarily resulted from the above-noted decreases in intellectual property enforcement and patent maintenance and evaluation costs, partially offset by increases in performance-based incentive compensation and patent amortization described above.
Development expense:   The $10.6 million increase in development expense was primarily attributable to the above-noted increases in performance-based compensation, consulting services, and costs related to commercial initiatives and the Signal Trust as described above. 
Selling, general and administrative expense:   The $6.5 million increase in selling, general and administrative expense was primarily attributable to the above-noted increases in performance-based compensation and personnel-related costs.


54


Repositioning expense: As part of our ongoing expense management, we initiated a Voluntary Early Retirement Program ("VERP") in September 2012. Approximately 60 employees elected to participate in the VERP across five locations. We incurred charges of zero and $1.5 million relating to the VERP in 2014 and 2013, respectively.
Other (Expense) Income
    The following table compares 2014 other (expense) income to 2013 other (expense) income (in thousands):
 
For the Year Ended December 31,
 
 
 
 
 
2014
 
2013
 
(Decrease)/Increase
Interest expense
$
(16,084
)
 
$
(15,475
)
 
$
(609
)
 
4
 %
Other (a)
(747
)
 
(22,058
)
 
21,311

 
(97
)%
Interest and investment income
1,399

 
14,296

 
(12,897
)
 
(90
)%
 
$
(15,432
)
 
$
(23,237
)
 
$
7,805

 
(34
)%
                            
(a) Includes other-than-temporary impairments.
The change in other expense primarily resulted from the recognition of a $21.7 million investment impairment on our investment in Pantech Co., Ltd. ("Pantech") during 2013, partially offset by a decrease in investment income attributable to $11.8 million of interest income associated with arbitration awards received during 2013. 
Income Taxes
In 2014, our effective tax rate was approximately 33.9% as compared to 42.0% in 2013, based on the statutory federal tax rate net of discrete federal and state taxes. The decrease in the effective tax rate from 2013 to 2014 was attributable to a net benefit from research and development tax credits covering the periods 2010 through 2014 resulting in a 3.8% lower effective tax rate, which was partially offset by a 1.1% effective tax rate increase associated with an audit settlement. The decrease in the effective tax rate also resulted a 4% reduction in effective tax rate associated with the impact of lower state tax expense resulting, in part, from the Company's income mix between patent licensing royalties and technology solutions revenue.
STATEMENT PURSUANT TO THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 - FORWARD-LOOKING STATEMENTS
This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. Such statements include certain information in “Part I, Item 1. Business” and “Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations” and other information regarding our current beliefs, plans and expectations, including without limitation the matters set forth below. Words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “forecast,” “believe,” “could,” “would,” “should,” “if,” “may,” “might,” “future,” “target,” “goal,” “trend,” “seek to,” “will continue,” “predict,” “likely,” “in the event,” variations of any such words or similar expressions contained herein are intended to identify such forward-looking statements. Forward-looking statements in this Annual Report on Form 10-K include, without limitation, statements regarding:
(i) Our objective to continue to be a leading designer and developer of technology solutions and intellectual property for the mobile industry and to monetize those solutions and intellectual property through a combination of licensing, sales and other revenue opportunities;
(ii) Our plans for executing on our business strategy, including our plans to develop and source innovative technologies related to wireless, establish and grow our patent-based revenue, pursue commercial opportunities for our advanced platforms and solutions, and maintain a collaborative relationship with key industry players and worldwide standards bodies;
(iii) Our belief that our portfolio includes a number of patents and patent applications that are or may be essential or may become essential to cellular and other wireless standards, including 3G, 4G and the IEEE 802 suite of standards, as well as patent applications that we believe may become essential to 5G standards that are under development;
(iv) Our belief that a number of our CDMA and OFDM/OFDMA inventions are, may be or may become essential to the implementation of CDMA and OFDM/OFDMA-based systems in use today;

55


(v) Our belief that companies making, importing, using or selling products compliant with the standards covered by our patent portfolio require a license under our patents and will require a license under patents that may issue from our pending patent applications;
(vi) Our belief that our ongoing research efforts and associated patenting activities enable us to sell patent assets that are not vital to our core licensing programs, as well as to execute patent swaps that can strengthen our overall portfolio;
(vii) Our belief that our standalone commercial initiatives are potential sources of revenue;
(viii) The predicted increases in worldwide mobile device shipments, including shipments of handsets, and the estimated growth of the IoT market, including the size of the connected device installed base and number of connected device shipments, over the next several years;
(ix) The types of licensing arrangements and various royalty structure models that we anticipate using under our future license agreements;
(x) The possible outcome of audits of our license agreements when underreporting or underpayment is revealed;
(xi) Our belief that our facilities are suitable and adequate for our present purposes and our needs in the near future;
(xii) Our expectation that the transfer to Conshohocken, Pennsylvania, of our King of Prussia, Pennsylvania, personnel and operations will occur in second quarter 2016;
(xiii) Our expectation that we will continue to pay a quarterly cash dividend on our common stock comparable to our quarterly $.20 per share cash dividend in the future;
(xiv) Our belief that intellectual property enforcement costs will likely continue to be a significant expense for us in the future;
(xv) Our belief that our available sources of funds will be sufficient to finance our operations, capital requirements, debt obligations, existing stock repurchase program and dividend program for the next twelve months;
(xvi) The potential effects of new accounting standards on our financial statements or results of operations;
(xvii) Our expectations with regard to any current tax audits;
(xiii) The expected amortization of fixed-fee royalty payments over the next twelve months to reduce our deferred revenue balance;
(xix) Our anticipated severance charge in the range of $1.5 million to $2.0 million during first quarter 2016 related to ongoing efforts to optimize our cost structure; and
(xx) The expected timing, outcome and impact of our various litigation, arbitration and administrative matters.
Although the forward-looking statements in this Form 10-K reflect the good faith judgment of our management, such statements can only be based on facts and factors currently known by us. Consequently, forward-looking statements concerning our business, results of operations and financial condition are inherently subject to risks and uncertainties. We caution readers that actual results and outcomes could differ materially from those expressed in or anticipated by such forward-looking statements due to a variety of factors, including, without limitation, the following:
(i) unanticipated difficulties or delays related to the further development of our technologies;
(ii) the failure of the markets for our technologies to materialize to the extent or at the rate that we expect;
(iii) changes in our plans, strategy or initiatives;
(iv) the challenges related to entering into new and renewed patent license agreements and unanticipated delays, difficulties or acceleration in the negotiation and execution of patent license agreements;
(v) our ability to leverage our strategic relationships and secure new patent license and technology solutions agreements on acceptable terms;
(vi) the impact of current trends in the industry that could result in reductions in and/or caps on royalty rates under new patent license agreements;
(vii) changes in the market share and sales performance of our primary licensees, delays in product shipments of our licensees, delays in the timely receipt and final reviews of quarterly royalty reports from our licensees, delays in payments from our licensees and related matters;

56


(viii) the timing and/or outcome of our various litigation, arbitration, regulatory or administrative proceedings, including any awards or judgments relating to such proceedings, additional legal proceedings, changes in the schedules or costs associated with legal proceedings or adverse rulings in such legal proceedings;
(ix) the determination of royalty rates, or other terms, under our patent license agreements through arbitration or other third party adjudications, or the establishment by arbitrators or other third party adjudicators of patent royalty rates at levels lower than our agreed or historical rates;
(x) the impact of potential patent legislation, USPTO rule changes and international patent rule changes on our patent prosecution and licensing strategies;
(xi) the impact of rulings in legal proceedings, potential legislation affecting the jurisdiction and authority of the USITC and potential changes to the IPR policies of worldwide standards bodies on our investments in research and development and our strategies for patent prosecution, licensing and enforcement;
(xii) the timing and/or outcome of any state or federal tax examinations or audits, changes in tax laws and the resulting impact on our tax assets and liabilities;
(xiii) the effects of any dispositions, acquisitions or other strategic transactions by the Company;
(xiv) decreased liquidity in the capital markets; and
(xv) unanticipated increases in our cash needs or decreases in available cash.
You should carefully consider these factors as well as the risks and uncertainties outlined in greater detail in Part I, Item 1A, in this Form 10-K before making any investment decision with respect to our common stock. These factors, individually or in the aggregate, may cause our actual results to differ materially from our expected and historical results. You should understand that it is not possible to predict or identify all such factors. In addition, you should not place undue reliance on the forward-looking statements contained herein, which are made only as of the date of this Form 10-K. We undertake no obligation to revise or update publicly any forward-looking statement for any reason, except as otherwise required by law.
Item 7A.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.
Cash Equivalents and Investments
The primary objectives of our investment activities are to preserve principal and maintain liquidity while at the same time capturing a market rate of return. To achieve these objectives, we maintain our portfolio of cash and cash equivalents, and short-term and long-term investments in a variety of securities, including government obligations, corporate bonds and commercial paper.
Interest Rate Risk — We invest our cash in a number of diversified high quality investment-grade fixed and floating rate securities with a fair value of $933.7 million at December 31, 2015. Our exposure to interest rate risks is not significant due to the short average maturity, quality and diversification of our holdings. We do not hold any derivative, derivative commodity instruments or other similar financial instruments in our investment portfolio. The risk associated with fluctuating interest rates is generally limited to our investment portfolio. We believe that a hypothetical 10% change in period-end interest rates would not have a significant impact on our results of operations or cash flows.
The following table provides information about our interest-bearing securities that are sensitive to changes in interest rates as of December 31, 2015. The table presents principal cash flows, weighted-average yield at cost and contractual maturity dates. Additionally, we have assumed that these securities are similar enough within the specified categories to aggregate these securities for presentation purposes.

57


Interest Rate Sensitivity
Principal Amount by Expected Maturity
Average Interest Rates
(in thousands)
 
2016
 
2017
 
2018
 
2019
 
2020
 
Thereafter
 
Total
Money market and demand accounts
$
333,671

 
$

 
$

 
$

 
$

 
$

 
$
333,671

Cash equivalents
$
176,536

 
$

 
$

 
$

 
$

 
$

 
$
176,536

Short-term investments
$
373,677

 
$
45,830

 
$
1,997

 
$
1,999

 
$

 
$

 
$
423,502

Average Interest rate
0.4
%
 
1.0
%
 
1.3
%
 
%
 
%
 
%
 
0.4
%
Cash and cash equivalents and available-for-sale securities are recorded at fair value.
Bank Liquidity Risk — As of December 31, 2015, we had approximately $202.4 million in operating accounts that are held with domestic and international financial institutions. The majority of these balances are held with domestic financial institutions. While we monitor daily cash balances in our operating accounts and adjust the cash balances as appropriate, these cash balances could be lost or become inaccessible if the underlying financial institutions fail or if they are unable to meet the liquidity requirements of their depositors. Notwithstanding, we have not incurred any losses and have had full access to our operating accounts to date.
Foreign Currency Exchange Rate Risk — We are exposed to limited risk from fluctuations in currencies, which might change over time as our business practices evolve, that could impact our operating results, liquidity and financial condition. We operate and invest globally. Adverse movements in currency exchange rates might negatively affect our business due to a number of situations. Currently, our international licensing agreements are typically made in U.S. dollars and are generally not subject to foreign currency exchange rate risk. We do not engage in foreign exchange hedging transactions at this time.
Between 2006 and 2015, we paid approximately $295.1 million in foreign taxes for which we have claimed foreign tax credits against our U.S. tax obligations. It is possible that as a result of tax treaty procedures, the U.S. government may reach an agreement with the related foreign governments that will result in a partial refund of foreign taxes paid with a related reduction in our foreign tax credits. Due to both foreign currency fluctuations and differences in the interest rate charged by the U.S. government compared to the interest rates, if any, used by the foreign governments, any such agreement could result in interest expense and/or foreign currency gain or loss.
Investment Risk — We are exposed to market risk as it relates to changes in the market value of our short-term and long-term investments in addition to the liquidity and creditworthiness of the underlying issuers of our investments. We hold a diversified investment portfolio, which includes, fixed and floating-rate, investment-grade marketable securities, mortgage and asset-backed securities and U.S. government and other securities. The instruments included in our portfolio meet high credit quality standards, as specified in our investment policy guidelines. This policy also limits our amount of credit exposure to any one issue, issuer and type of instrument. Given that the guidelines of our investment policy prohibit us from investing in anything but highly rated instruments, our investments are not subject to significant fluctuations in fair value due to the volatility of the credit markets and prevailing interest rates for such securities. Our marketable securities, consisting of government obligations, corporate bonds and commercial paper, are classified as available-for-sale with a fair value of $423.5 million as of December 31, 2015.
Equity Risk — We are exposed to changes in the market-traded price of our common stock as it influences the calculation of earnings per share. In connection with the offering of the Notes, we entered into convertible note hedge transactions with option counterparties. We also sold warrants to the option counterparties. These transactions have been accounted for as an adjustment to our shareholders' equity. The convertible note hedge transactions are expected to reduce the potential equity dilution upon conversion of the Notes. The warrants along with any shares issuable upon conversion of the Notes will have a dilutive effect on our earnings per share to the extent that the average market price of our common stock for a given reporting period exceeds the applicable strike price or conversion price of the warrants or convertible Notes, respectively.

58


Item 8.
FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

All other schedules are omitted because they are either not required or applicable or equivalent information has been included in the financial statements and notes thereto.


59


Report of Independent Registered Public Accounting Firm
To the Board of Directors and Shareholders of InterDigital, Inc.:

In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of InterDigital, Inc. and its subsidiaries at December 31, 2015 and December 31, 2014, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2015 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the accompanying index presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these financial statements and financial statement schedule, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in “Management's Annual Report on Internal Control Over Financial Reporting” appearing under Item 9A. Our responsibility is to express opinions on these financial statements, on the financial statement schedule, and on the Company's internal control over financial reporting based on our integrated 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 audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

As discussed in Note 2 to the consolidated financial statements, the Company changed the manner in which it classifies deferred tax assets and deferred tax liabilities in 2015.

A company’s internal control over financial reporting is a process designed 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 (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) 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 (iii) 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 its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/  PricewaterhouseCoopers LLP
Philadelphia, Pennsylvania
February 18, 2016


60


INTERDIGITAL, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(in thousands, except per share data)
 
DECEMBER 31,
2015
 
DECEMBER 31,
2014
ASSETS
 
 
 
CURRENT ASSETS:
 
 
 
Cash and cash equivalents
$
510,207

 
$
428,567

Short-term investments
423,501

 
275,361

Accounts receivable, less allowances of $0 and $1,750
53,868

 
51,702

Prepaid and other current assets
23,391

 
32,227

Total current assets
1,010,967

 
787,857

PROPERTY AND EQUIPMENT, NET
12,148

 
12,546

PATENTS, NET
277,579

 
265,540

DEFERRED TAX ASSETS
160,572

 
125,802

OTHER NON-CURRENT ASSETS
13,219

 
1,217

 
463,518

 
405,105

TOTAL ASSETS
$
1,474,485

 
$
1,192,962

LIABILITIES AND SHAREHOLDERS’ EQUITY
 
 
 
CURRENT LIABILITIES:
 
 
 
Current portion of long-term debt
$
227,174

 
$

Accounts payable
19,002

 
34,654

Accrued compensation and related expenses
26,013

 
27,089

Deferred revenue
106,229

 
124,695

Taxes payable
1,405

 

Dividend payable
7,068

 
7,456

Other accrued expenses
13,082

 
11,275

Total current liabilities
399,973

 
205,169

LONG-TERM DEBT
259,595

 
216,206

LONG-TERM DEFERRED REVENUE
289,039

 
293,342

OTHER LONG-TERM LIABILITIES
3,983

 
2,568

 
 
 
 
TOTAL LIABILITIES
952,590

 
717,285

 
 
 
 
COMMITMENTS AND CONTINGENCIES

 

 
 
 
 
SHAREHOLDERS’ EQUITY:
 
 
 
Preferred Stock, $0.10 par value, 14,399 shares authorized, 0 shares issued and outstanding

 

Common Stock, $0.01 par value, 100,000 shares authorized, 70,130 and 69,800 shares issued and 35,414 and 36,920 shares outstanding
701

 
698

Additional paid-in capital
663,073

 
614,162

Retained earnings
847,033

 
757,050

Accumulated other comprehensive (loss) income
(178
)
 
118

 
1,510,629

 
1,372,028

Treasury stock, 34,716 and 32,880 shares of common held at cost
1,000,110

 
903,700