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Part IV

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K10-K/A

AMENDMENT NO. 1

(Mark One)  

ý

 

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 201629, 2018

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: 000-29823

SILICON LABORATORIES INC.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)
 74-2793174
(I.R.S. Employer
Identification No.)

400 West Cesar Chavez, Austin, Texas
(Address of principal executive offices)

 

78701
(Zip Code)

(512) 416-8500
(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s)Name of each exchange
on which registered
Common Stock, $0.0001 par valueSLAB The NASDAQ Stock Market LLC

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. ý Yes    o No

         Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. o Yes    ý No

         Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Sections 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. ý Yes    o No

         Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, 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). ý Yes    o No

         Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the 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. ý

         Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer"filer," "smaller reporting company" and "smaller reporting"emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer ý Accelerated filer o Non-accelerated filer o Smaller reporting company o

Emerging growth company o

         If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

         Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).o Yes    ý No

         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 as of the last business day of the registrant's most recently completed second fiscal quarter (July 1, 2016)(June 29, 2018) was $1,951,606,092approximately $4.2 billion (assuming, for this purpose, that only directors and officers are deemed affiliates).

         There were 41,890,79143,088,623 shares of the registrant's common stock issued and outstanding as of January 23, 2017.21, 2019.

DOCUMENTS INCORPORATED BY REFERENCE

         Portions of the Proxy Statement for the registrant's 20162018 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.

   


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EXPLANATORY NOTE

        In April 2019, the Public Company Accounting Oversight Board conducted an inspection of our fiscal 2018 audit conducted by Ernst & Young LLP ("E&Y") which originally resulted in an unqualified opinion regarding our internal controls over financial reporting. Following the inspection, E&Y re-evaluated our internal controls over financial reporting as of December 29, 2018 and identified deficiencies in the area of internal controls over business combinations, primarily the maintenance of sufficient contemporaneous documentation of management review controls over assumptions used in the valuation of acquired intangible assets and related recording of goodwill. As a result, we have concluded that we have a material weakness related to such internal controls which we are in the process of addressing.

        The material weaknessdid not result in any misstatement of our consolidated financial statements for the year ended December 29, 2018.

        This Amendment No. 1 on Form 10-K/A (this "Amendment No. 1") amends Silicon Laboratories Inc.'s Annual Report on Form 10-K for the fiscal year ended December 29, 2018 (the "Original Filing"). The purpose of this Amendment No.1 is to (i) revise the Report of Independent Registered Public Accounting Firm of Ernst & Young LLP (the "Auditor's Internal Control Report") contained on page F-1 of Part IV, Item 15 of the Original Filing regarding the effectiveness of our internal control over financial reporting, (ii) amend Part II, Item 8 of the Original Filing relating to the Report of Independent Registered Public Accounting Firm of Ernst & Young LLP contained on page F-3 in Part IV, Item 15 of the Original Filing solely to reflect such revision of the Auditor's Internal Control Report, (iii) revise the disclosure on the effectiveness of our disclosure controls and procedures and the disclosure on our internal control over financial reporting in Part II, Item 9A of the Original Filing to reflect management's conclusion that our internal control over financial reporting and disclosure controls and procedures were not effective at December 29, 2018 due to the material weakness in our internal control over financial reporting identified subsequent to the issuance of the Original Filing as described above and (iv) add an additional risk factor regarding the internal controls in Part I, Item 1A.

        As required by Rule 12b-15 promulgated under the Securities Exchange Act of 1934, as amended, we have included the entire text of the Items amended in this Amendment No. 1. However, there have been no changes to the text of such item other than the changes stated in the immediately preceding paragraph. Furthermore, there have been no changes to the XBRL data filed in Exhibit 101 of the Original Filing. Other than as described above and the inclusion with this Amendment No. 1 of new certifications by management, a new consent of Ernst & Young LLP, our independent registered public accounting firm, and related amendments to the List of Exhibits contained in Part IV, Item 15 of the Original Filing, this Amendment No. 1 speaks only as of the date of the Original Filing and does not amend, supplement or update any information contained in the Original Filing to give effect to any subsequent events. Accordingly, this Amendment No. 1 should be read in conjunction with the Original Filing and our reports filed with the U.S. Securities and Exchange Commission ("SEC") subsequent to the Original Filing.


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Table of Contents

 
  
  
 Page
Number
 

Part I

   

 

    

 Item 1.

Business

2

Item 1A. 

Risk Factors

  132 

Item 1B.

Unresolved Staff Comments

27

Item 2.

Properties

28

Item 3.

Legal Proceedings

28

Item 4.

Mine Safety Disclosures

29

Part II

   

 

    

 Item 5.

Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

30

Item 6.

Selected Financial Data

32

Item 7.

Management's Discussion and Analysis of Financial Condition and Results of Operations

33

Item 7A.

Quantitative and Qualitative Disclosures about Market Risk

47

Item 8. 

Financial Statements and Supplementary Data

  48

Item 9.

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

4818 

 Item 9A. 

Controls and Procedures

  4818 

Item 9B.

Other Information

49

Part III

Item 10.

Directors, Executive Officers and Corporate Governance

50

Item 11.

Executive Compensation

50

Item 12.

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

50

Item 13.

Certain Relationships and Related Transactions, and Director Independence

50

Item 14.

Principal Accounting Fees and Services

50

Part IV

   

 

    

 Item 15. 

Exhibits and Financial Statement Schedules

  5120 


Cautionary Statement

Except for the historical financial information contained herein, the matters discussed in this report on Form 10-K (as well as documents incorporated herein by reference) may be considered "forward-looking" statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements include declarations regarding the intent, belief or current expectations of Silicon Laboratories Inc. and its management and may be signified by the words "believe," "estimate," "expect," "intend," "anticipate," "plan," "project," "will" or similar language. You are cautioned that any such forward-looking statements are not guarantees of future performance and involve a number of risks and uncertainties. Actual results could differ materially from those indicated by such forward-looking statements. Factors that could cause or contribute to such differences include those discussed under "Risk Factors" and elsewhere in this report. Silicon Laboratories disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.


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Part I


Item 1.    BusinessPart I

General

        Silicon Laboratories Inc. is a provider of silicon, software and solutions for the Internet of Things (IoT), Internet infrastructure, industrial, consumer and automotive markets. We solve some of the electronics industry's toughest problems, providing customers with significant advantages in performance, energy savings, connectivity and design simplicity. Backed by our world-class engineering teams with strong software and mixed-signal design expertise, Silicon Laboratories empowers developers with the tools and technologies they need to advance quickly and easily from initial idea to final product.

        Mixed-signal integrated circuits (ICs) are electronic components that convert real-world analog signals, such as sound and radio waves, into digital signals that electronic products can process. Therefore, mixed-signal ICs are critical components in products addressing a variety of markets, including industrial, communications, consumer and automotive. Our world-class, mixed-signal ICs leverage standard complementary metal oxide semiconductor (CMOS), a low cost, widely available process technology. This enables smaller, more cost effective and energy efficient solutions. Our expertise in analog-intensive, mixed-signal IC design in CMOS allows us to develop new and innovative products that are highly integrated, simplifying our customers' designs and improving their time-to-market.

Industry Background

        The pervasiveness of connectivity and the explosion in mobile computing is driving semiconductor consumption. Intelligence is being added to electronic systems to enable remote monitoring, power efficiency and an improved user experience. This in turn is increasing the demand for bandwidth, requiring more infrastructure to support higher performance networks. The nearly ubiquitous availability of Internet access and the increasing intelligence of electronic devices and mobility are enabling what is called the Internet of Things, a term that describes the exponential increase in IP-enabled devices connected to the Internet.

        These trends require more and more interaction between the analog world we live in and the digital world of computing, and therefore require analog-intensive, mixed-signal circuits. Traditional mixed-signal designs relied upon solutions built with numerous, complex discrete analog and digital components. While these traditional designs provide the required functionality, they are often inefficient and inadequate for use in markets where size, cost, power consumption and performance are increasingly important product differentiators. In order to improve their competitive position, electronics manufacturers need to reduce the cost and complexity of their systems and enable new features or functionality to differentiate themselves from their competitors.

        Simultaneously, these manufacturers face accelerating time-to-market demands and must be able to rapidly adapt to evolving industry standards and new technologies. Because analog-intensive, mixed-signal design expertise is difficult to find, these manufacturers increasingly are turning to third parties, like us, to provide advanced mixed-signal solutions. Mixed-signal design requires specific expertise and relies on creative, experienced engineers to deliver solutions that optimize speed, power and performance, despite the noisy digital environment, and within the constraints of standard manufacturing processes. The development of this design expertise typically requires years of practical analog design experience under the guidance of a senior engineer, and engineers with the required level of skill and expertise are in short supply.

        Many IC solution providers lack sufficient analog expertise to develop compelling mixed-signal products. As a result, manufacturers of electronic devices value providers that can supply them with


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mixed-signal solutions with greater functionality, smaller size and lower power requirements at a reduced cost and shorter time-to-market.

Products

        We provide analog-intensive, mixed-signal solutions for use in a variety of electronic products in a broad range of applications for the IoT market including connected home, smart lighting, security, wearables and smart energy applications. We are a supplier of wireless connectivity solutions for the IoT based on Bluetooth®, zigbee®, Thread, Wi-Fi® and sub-GHz technologies.

        We provide a wide range of timing and isolation products for infrastructure applications including high-performance clocks and oscillators for networking equipment, data centers and wireless base stations, as well as digital isolators and current sensors for industrial power supplies, motor control, solar inverters and hybrid-electric vehicles. We also provide broadcast products, such as TV tuners and demodulators and automotive radio tuners, and access products including subscriber line interface circuits for voice over IP (VoIP), embedded modems, and Power over Ethernet (PoE) power source equipment and powered device ICs.

        Our products integrate complex mixed-signal functions that are frequently performed by numerous discrete components in competing products into a single chip or chipset. By doing so, we are able to create products that, when compared to many competing products:

        We group our products into the following categories:


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        The following table summarizes the diverse product areas and applications for the various products that we have introduced to customers:

Product Areas and Description
Applications

Internet of Things Products

Microcontrollers and Wireless Products

We offer a family of products ideal for embedded systems that include energy friendly 8-bit mixed-signal microcontrollers, 32-bit wireless MCUs and ultra low-power 32-bit MCUs based on scalable ARM® Cortex-M0+/M3/M4 cores, as well as wireless connectivity devices such as our EZRadio® family of fully integrated, low power transceivers. Our wireless modules provide flexible, highly integrated products that meet demanding requirements and can be used in a number of applications. Our wireless connectivity solutions for the IoT are based on Bluetooth, zigbee, Thread, Wi-Fi and sub-GHz technologies. Our EFM32™, EFM8™, 8051, wireless MCUs and wireless SoCs are supported by Simplicity Studio™, a one-click access to design tools, documentation, software and support resources. These products generally integrate intelligent data capture, high performance processing, and communication interfaces in a single system on a chip. We also offer a real-time operating system (RTOS) to help simplify software development for IoT applications by coordinating and prioritizing multiprotocol connectivity, SoC peripherals and other system-level activities. This family of products addresses a variety of end-markets, including the IoT (connected home, smart lighting, security, wearables and smart energy applications), automotive, communications, consumer, industrial, medical and power management markets.

Home automation

Security systems

Smart lighting

Smart metering

Wearables

Industrial automation and control

Consumer electronics

Medical instrumentation

Automotive sensors and controls

Electronic test and measurement equipment

White goods

Remote controls

Sensors

Our sensor products include optical sensors (proximity, ambient light gestures and heart rate), as well as relative humidity (RH) / temperature sensors. These devices leverage our mixed-signal capability to provide high accuracy, process technology to improve performance and lower power consumption than competing parts.

Consumer health & fitness (wearables)

Smart home sensing

Industrial controls

Toys and consumer electronics

Monitors and lavatory controls

Consumer medical


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Product Areas and Description
Applications
Broadcast Products

Broadcast Consumer

Our worldwide hybrid TV tuners with analog TV demodulator in a single CMOS IC leverage our proven digital low-IF architecture and exceed the performance of traditional discrete TV tuners, enabling TV makers to deliver improved picture quality and better reception for both analog and digital broadcasts. Our small, low power and high performance single and dual digital video demodulators support DVB-T/T2, DVB-S/S2/S2X, DVB-C/C2, and/or ISDB-T in a single chip and are ideal for equipment receiving digital terrestrial, satellite and/or cable services. Our AM/FM, HD Radio™ and DAB/DAB+ receivers deliver a complete radio solution from antenna input to audio output in a single chip. The broadcast audio products are based on an innovative digital architecture that enables significant improvements in performance, which translates to a better consumer experience, while reducing system cost and board space for our customers.

Integrated digital televisions (iDTV)

Free-to-Air (FtA) or pay-TV set-top boxes

PVR/DVD/Blu-Ray/HDD video recorders

PC-TV applications

AM/FM clock radios

Portable audio devices

MP3/digital media players

Home theater systems

DAB digital radios

HD Radio digital radios

Broadcast Automotive

Our high-performance solutions for car sound systems include high fidelity radio ICs that improve the end user experience, reduce system cost and offer the latest digital radio technologies like DAB/DAB+ and HD Radio. Our scalable architecture enables infotainment system suppliers to leverage their investments across multiple product lines ranging from entry-level car radios to cutting-edge multi-tuner, multi-antenna radios for premium vehicles.

Automotive infotainment systems/radios

Navigation/GPS devices

Infrastructure Products

Timing Devices

Robust demand for bandwidth is driving the deployment of next-generation Internet infrastructure equipment to deliver higher speed, higher capacity and more flexible networks. This transition puts unique requirements on the clocks and oscillators used to provide timing and synchronization for the equipment responsible for switching, transporting, processing and storing network traffic. To meet this need, we provide low jitter, frequency flexible, mass customizable timing solutions that accelerate development time, minimize cost and improve system reliability. Our high-performance "clock-tree-on-a-chip" products offer highly integrated single-chip IC solutions for clock synthesis and jitter attenuation, offering superior jitter performance and frequency flexibility for high data rate applications.

Optical networking

Networking equipment

Telecommunications

Broadcast video

Servers and storage

Wireless backhaul

Wireless base stations

Small cells

Test and measurement equipment

Image processing

High-speed data acquisition

Isolation Products

Our isolation techniques enable customers to meet safety standards for isolation and solve difficult electronic noise issues. Products include multi-channel isolators, isolated drivers, isolated power converters and mixed-signal devices that simplify design, improve reliability, minimize noise emissions, and reduce system cost.

Switch mode power supplies

Industrial networking

Hybrid / Electric automotive drive trains

Solar inverters

Motor control

Isolated analog data acquisition


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Product Areas and Description
Applications
Access Products

ProSLIC® Subscriber Line Interface Circuits for VoIP

Our ProSLIC provides the analog subscriber line interface on the source end of the telephone which generates dial tone, busy tone, caller ID and ring signal. Our offerings are well suited for the market for Voice over IP telephony applications deployed over cable, DSL, optical and wireless fixed terminal networks.

Voice functionality for cable, DSL and optical digital modems and terminal adapters

VoIP residential gateways

Wireless local loop remote access systems

PBXs

ISOmodem® Embedded Modems

Our ISOmodem embedded modems leverage innovative silicon direct access arrangement (DAA) technology and a digital signal processor to deliver a globally compliant, compact analog modem for embedded applications.

Point of sale (POS) terminals

Fax machines and multi-function printers

Security systems

Industrial monitoring

Remote medical monitoring

Power over Ethernet

Our Power over Ethernet power source equipment and powered device ICs offer highly differentiated solutions with a reduced total bill of materials (BOM) and improved performance and reliability. Our solutions offer a higher level of integration not available with competing solutions.

Enterprise networking routers and switches

Wireless access points (WAP)

VoIP phones

POS terminals

Security cameras

        Revenues during fiscal 2016, 2015 and 2014 were generated predominately by sales of our mixed-signal products. The following summarizes our revenue by product category (in thousands):

 
 Fiscal Year 
 
 2016 2015 2014 

Internet of Things

 $314,614 $262,329 $209,005 

Broadcast

  157,746  161,787  204,256 

Infrastructure

  147,677  121,974  108,123 

Access

  77,589  98,736  99,320 

Revenues

 $697,626 $644,826 $620,704 

Customers, Sales and Marketing

        We market our products through our direct sales force and through a network of independent sales representatives and distributors. Direct and distributor customers buy on an individual purchase order basis, rather than pursuant to long-term agreements.

        We consider our customer to be the end customer purchasing either directly from a distributor, a contract manufacturer or us. An end customer purchasing through a contract manufacturer typically instructs such contract manufacturer to obtain our products and incorporate such products with other components for sale by such contract manufacturer to the end customer. Although we actually sell the products to, and are paid by, the distributors and contract manufacturers, we refer to such end customer as our customer. Three of our distributors who sell to our customers, Edom Technology, Avnet and Arrow Electronics, each represented 17%, 13% and 11% of our revenues during fiscal 2016, respectively. No other distributor accounted for 10% or more of revenues for fiscal 2016.


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        During fiscal 2016, our ten largest end customers accounted for 25% of our revenues. We had no customer that represented more than 10% of our revenues during this period.

        We maintain numerous sales offices in Asia, the Americas and Europe. Revenue is attributed to a geographic area based on the shipped-to location. The percentage of our revenues derived from outside of the United States was 86% in fiscal 2016. For further information regarding our revenues and long-lived assets by geographic area, see Note 17,Segment Information, to the Consolidated Financial Statements.

        Our direct sales force is comprised of a number of sales professionals who possess varied levels of responsibility and experience, including directors, country managers, regional sales managers, district sales managers, strategic account managers, field sales engineers and sales representatives. We also utilize independent sales representatives and distributors to generate sales of our products. We have relationships with many independent sales representatives and distributors worldwide whom we have selected based on their understanding of the mixed-signal marketplace and their ability to provide effective field sales applications support for our products.

        Our marketing efforts are targeted at both identified industry leaders and emerging market participants. Direct marketing activities are supplemented by a focused marketing communications effort that seeks to raise awareness of our company and products. Our public relations efforts are focused on leading trade and business publications. Our external website is used to deliver corporate and product information. We also pursue targeted advertising in key trade publications and we have a cooperative marketing program that allows our distributors and representatives to promote our products to their local markets in conjunction with their own advertising activities. Finally, we maintain a presence at strategic trade shows and industry events. These activities, in combination with direct sales activities, help drive demand for our products.

        Due to the complex and innovative nature of our products, we employ experienced applications engineers who work closely with customers and distributors to support the design-win process, and can significantly accelerate the customer's time to market. A design-win occurs when a customer has designed our ICs into its product architecture and ordered product from us. A considerable amount of effort to assist the customer in incorporating our ICs into its products is typically required prior to any sale. In many cases, our innovative ICs require significantly different implementations than existing approaches and, therefore, successful implementations may require extensive communication with potential customers. The amount of time required to achieve a design-win can vary substantially depending on a customer's development cycle, which can be relatively short (such as three months) or very long (such as two years) based on a wide variety of customer factors. Not all design wins ultimately result in revenue, or may result in less revenue than expected. However, once a completed design architecture has been implemented and produced in high volumes, our customers are reluctant to significantly alter their designs due to this extensive design-win process. We believe this process, coupled with our intellectual property protection, promotes relatively longer product life cycles for our products and high barriers to entry for competitive products, even if such competing products are offered at lower prices. Our close collaboration with our customers provides us with knowledge of derivative product ideas or completely new product line offerings that may not otherwise arise in other new product discussions.

Research and Development

        Through our research and development efforts, we leverage experienced analog and mixed-signal engineering talent and expertise to create new ICs that integrate functions typically performed inefficiently by multiple discrete components. This integration generally results in lower costs, smaller die sizes, lower power demands and enhanced price/performance characteristics. We attempt to reuse successful techniques for integration in new applications where similar benefits can be realized. We


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believe that we have attracted many of the best engineers in our industry. We believe that reliable and precise analog and mixed-signal ICs can only be developed by teams of engineers who have significant analog experience and are familiar with the intricacies of designing these ICs for commercial volume production. The development of test methodologies is just one example of a critical activity requiring experience and know-how to enable the rapid release of a new product for commercial success. We have accumulated a vast set of trade secrets that allow us to pursue innovative approaches to mixed-signal problems that are difficult for competitors to duplicate. We highly value our engineering talent and strive to maintain a very high bar when bringing new recruits to the company.

        Research and development expenses were $199.7 million, $188.1 million and $173.0 million and in fiscal 2016, 2015 and 2014, respectively.

Technology

        Our product development process facilitates the design of highly-innovative, analog-intensive, mixed-signal ICs. Our engineers' deep knowledge of existing and emerging standards and performance requirements helps us to assess the technical feasibility of a particular IC. We target areas where we can provide compelling product improvements. Once we have solved the primary challenges, our field application engineers continue to work closely with our customers' design teams to maintain and develop an understanding of our customers' needs, allowing us to formulate derivative products and refined features.

        In providing mixed-signal ICs for our customers, we believe our key competitive advantages are:

        To fully capitalize on these advantages, we have assembled a world-class development team with exceptional analog and mixed-signal design expertise led by accomplished senior engineers.

        We believe that our most significant core competency is world-class analog and RF design capability. Additionally, we strive to design substantially all of our ICs in standard CMOS processes. While it is often significantly more difficult to design analog ICs in CMOS, CMOS provides multiple benefits versus existing alternatives, including significantly reduced cost, reduced technology risk and greater worldwide foundry capacity. CMOS is the most commonly used process technology for manufacturing digital ICs and as a result is most likely to be used for the manufacturing of ICs with finer line geometries. These finer line geometries can enable smaller and faster ICs. By designing our ICs in CMOS, we enable our products to benefit from this trend towards finer line geometries, which allows us to integrate more digital functionality into our mixed-signal ICs.

        Designing analog and mixed-signal ICs is significantly more complicated than designing standalone digital ICs. While advanced software tools exist to help automate digital IC design, there are far fewer tools for advanced analog and mixed-signal IC design. In many cases, our analog circuit design efforts begin at the fundamental transistor level. We believe that we have a demonstrated ability to design the most difficult analog and RF circuits using standard CMOS technologies.


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        We consider the partitioning of a circuit to be a proprietary and creative design technique. Deep systems knowledge allows us to use our digital signal processing (DSP) design expertise to maximize the price/performance characteristics of both the analog and digital functions and allow our ICs to work in an optimized manner to accomplish particular tasks. Generally, we attempt to move analog functions into the digital domain as quickly as possible, creating system efficiencies without compromising performance. These patented approaches require our advanced DSP and systems expertise. We then leverage our firmware know-how to change the 'personality' of our devices, optimizing features and functions needed by various markets we serve. For example, our broadcast audio products use a proven digital low-IF receiver and transmitter architecture to deliver superior RF performance and interference rejection compared to traditional, analog-only approaches. Digital signal processing is utilized to optimize sound quality under varying signal conditions, enabling a better consumer experience. Firmware has enabled us to rapidly expand the portfolio to address multiple markets without substantial silicon changes, including shortwave, longwave, analog tuned, digital tuned and even high performance HD-capable automotive radios.

        We have the talent and circuit integration methodologies required to combine precision analog, high-speed digital, flash memory and in-system programmability into a single, monolithic CMOS integrated circuit. Our microcontroller products are designed to capture an external analog signal, convert it to a digital signal, compute digital functions on the stream of data and then communicate the results through a standard digital interface. The ability to develop standard products with the broadest possible customer application base while being cost efficient with the silicon area of the monolithic CMOS integrated circuit requires a keen sense of customer value and engineering capabilities. Additionally, to manage the wide variety of signals on a monolithic piece of silicon including electrical noise, harmonics and other electronic distortions requires a fundamental knowledge of device physics and accumulated design expertise.

        Our software expertise allows us to develop products for markets where intelligent data capture, high-performance processing and communication are increasingly important product differentiators. The software we have developed to address these markets enable machine-to-machine communications, providing intelligence to electronic systems. Our products integrate high-performance, low-power wireless and microcontroller ICs with reliable and scalable software into a flexible and robust networking platform.

        The demand for low-power, small-footprint wireless technology is accelerating as more and more IP-enabled end points are being connected to the Internet of Things (IoT). Our software enables a broad range of power-sensitive applications for the IoT, including smart energy, home automation, security and other connected products. We believe that the combination of our software and IC design expertise differentiates us from many of our competitors.

        As the IoT continues to mature, a new class of embedded applications is emerging, presenting feature-rich and task-intensive use cases. This growing complexity is driving the need for real-time operating systems to help simplify software development for IoT applications by coordinating and prioritizing multiprotocol connectivity, SoC peripherals and other system-level activities. In addition to being able to manage numerous application tasks, an RTOS enhances scalability, and makes complex applications predictable and reliable. To address these application needs, we acquired Micrium, an embedded RTOS provider. Micrium has established itself as a reliable, high performance and trusted RTOS software platform, with an installed base that has grown to millions of devices.


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        The market for wireless modules has grown as customers search for solutions that provide turnkey wireless connectivity to their products. The development of modules is difficult due to stringent requirements, including high levels of integration and programmability, performance, reliability, security and power efficiency. In addition, designs must meet numerous wireless standards deployed in various environments and serving diverse requirements.

        Our combined expertise in IC design and software allows us to engineer the development of our modules to create a robust, high-performance connection in challenging wireless environments. We have developed wireless modules based on numerous wireless standards, including Bluetooth, zigbee, Thread, Wi-Fi and sub-GHz. We believe our demonstrated proficiency in the design of modules provides our customers with significant advantages.

        Our focused expertise in mixed-signal ICs is the result of the breadth of engineering talent we have assembled with experience working in analog-intensive CMOS design for a wide variety of applications. This expertise, which we consider a competitive advantage, is the foundation of our in-depth understanding of the technology and trends that impact electronic systems and markets. Our expertise includes:

        Our understanding of the role of analog/digital interfaces within electronic systems, standards evolution, and end market drivers enables us to identify product development opportunities and capitalize on market trends.

Manufacturing

        As a fabless semiconductor company, we conduct IC design and development in our facilities and electronically transfer our proprietary IC designs to third-party semiconductor fabricators who process silicon wafers to produce the ICs that we design. Our IC designs typically use industry-standard CMOS manufacturing process technology to achieve a level of performance normally associated with more expensive special-purpose IC fabrication technology. We believe the use of CMOS technology facilitates the rapid production of our ICs within a lower cost framework. Our IC production employs submicron process geometries which are readily available from leading foundry suppliers worldwide, thus increasing the likelihood that manufacturing capacity will be available throughout our products' life cycles. We currently partner with Taiwan Semiconductor Manufacturing Co. (TSMC) or TSMC's affiliates and Semiconductor Manufacturing International Corporation (SMIC) to manufacture the majority of our semiconductor wafers. We believe that our fabless manufacturing model significantly reduces our capital requirements and allows us to focus our resources on design, development and marketing of our ICs.

        Once the silicon wafers have been produced, they are shipped directly to our third-party assembly subcontractors. The assembled ICs are then moved to the final testing stage. This operation can be performed by the same contractor that assembled the IC, other third-party test subcontractors or within our internal facilities prior to shipping to our customers. During fiscal 2016, most of our units shipped


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were tested by offshore third-party test subcontractors. We expect that our utilization of offshore third-party test subcontractors will remain substantial during fiscal 2017.

Backlog

        We include in backlog accepted product purchase orders from customers and worldwide distributor stocking orders. We only include orders with an expected shipping date from us within six months. Product orders in our backlog are subject to changes in delivery schedules or cancellation at the option of the purchaser typically without penalty. Our backlog may fluctuate significantly depending upon customer order patterns which may, in turn, vary considerably based on rapidly changing business circumstances. Shipments to distributors are not recognized as revenue until the products are sold by the distributors. Additionally, our arrangements with distributors typically provide for price protection and stock rotation activities. Accordingly, we do not believe that our backlog at any time is necessarily representative of actual sales for any succeeding period.

Competition

        The markets for semiconductors generally, and for analog and mixed-signal ICs in particular, are intensely competitive. We anticipate that the market for our products will continually evolve and will be subject to rapid technological change. We believe the principal competitive factors in our industry are:

Product size;

Power requirement;

Level of integration;

Customer support;

Product capabilities;

Reputation;

Reliability;

Ability to rapidly introduce new products to market;

Price;

Intellectual property; and

Performance;

Software.

        We believe that we are competitive with respect to these factors, particularly because our ICs typically are smaller in size, are highly integrated, achieve high performance specifications at lower price points than competitive products and are manufactured in standard CMOS which generally enables us to supply them on a relatively rapid basis to customers to meet their product introduction schedules. However, disadvantages we face include our relatively short operating history in certain of our markets and the need for customers to redesign their products and modify their software to implement our ICs in their products.

        Due to our diversified product portfolio and the numerous markets and applications we serve, we target a relatively large number of competitors. We compete with Analog Devices, Broadcom, Conexant, Cypress, IDT, Marvell Technology Group, Maxim Integrated Products, MaxLinear, Microchip, Microsemi, Nordic Semiconductor, NXP Semiconductors, Qualcomm, Renesas, STMicroelectronics, Texas Instruments, Vectron International and others. We expect to face competition in the future from our current competitors, other manufacturers and designers of semiconductors and start-up semiconductor design companies. Our competitors may also offer bundled solutions offering a more complete product, which may negatively impact our competitive position despite the technical merits or advantages of our products. In addition, our customers could develop products or technologies internally that would replace their need for our products and would become a source of competition. We could also face competition from module makers or other systems suppliers that may include mixed-signal components in their products that could eliminate the need for our ICs.

        Many of our competitors and potential competitors have longer operating histories, greater name recognition, access to larger customer bases, complementary product offerings, and significantly greater financial, sales and marketing, manufacturing, distribution, technical and other resources than us. Current and potential competitors have established or may establish financial and strategic relationships between themselves or with our existing or potential customers, resellers or other third parties.


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Accordingly, it is possible that new competitors or alliances among competitors could emerge and rapidly acquire significant market share.

Intellectual Property

        Our future success depends in part upon our proprietary technology. We seek to protect our technology through a combination of patents, copyrights, trade secrets, trademarks and confidentiality procedures. As of December 31, 2016, we had approximately 1,516 issued or pending United States and foreign patents. There can be no assurance that patents will ever be issued with respect to our patent applications. Furthermore, it is possible that any patents held by us may be invalidated, circumvented, challenged or licensed to others. In addition, there can be no assurance that such patents will provide us with competitive advantages or adequately safeguard our proprietary rights. While we continue to file new patent applications with respect to our recent developments, existing patents are granted for prescribed time periods and will expire at various times in the future.

        We claim copyright protection for proprietary documentation for our products. We have filed for registration, or are in the process of filing for registration, the visual images of certain ICs with the U.S. Copyright Office. We have registered the "Silicon Labs" logo and a variety of other product and product family names as trademarks in the United States and selected foreign jurisdictions. All other trademarks, service marks or trade names appearing in this report are the property of their respective owners. We also attempt to protect our trade secrets and other proprietary information through agreements with our customers, suppliers, employees and consultants, and through other customary security measures. We intend to protect our rights vigorously, but there can be no assurance that our efforts will be successful. In addition, the laws of other countries in which our products are sold may not protect our products and intellectual property rights to the same extent as the laws of the United States.

        While our ability to effectively compete depends in large part on our ability to protect our intellectual property, we believe that our technical expertise and ability to introduce new products in a timely manner will be an important factor in maintaining our competitive position.

        Many participants in the semiconductor and electronics industries have a significant number of patents and have frequently demonstrated a readiness to commence litigation based on allegations of patent and other intellectual property infringement. From time to time, third parties may assert infringement claims against us. We may not prevail in any such litigation or may not be able to license any valid and infringed patents from third parties on commercially reasonable terms, if at all. Litigation, regardless of the outcome, is likely to result in substantial cost and diversion of our resources, including our management's time. Any such litigation could materially adversely affect us.

        Our licenses include industry standard licenses with our vendors, such as wafer fabrication tool libraries, third-party core libraries, computer-aided design applications and business software applications.

Employees

        As of December 31, 2016, we employed 1,252 people. Our success depends on the continued service of our key technical and senior management personnel and on our ability to continue to attract, retain and motivate highly skilled analog and mixed-signal engineers. The competition for such personnel is intense. We have never had a work stoppage and none of our U.S. employees are represented by a labor organization. We consider our employee relations to be good.


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Environmental Regulation

        Federal, state and local regulations impose various environmental controls on the storage, use, discharge and disposal of certain chemicals and gases used in the semiconductor industry. Our compliance with these laws and regulations has not had a material impact on our financial position or results of operations.

Available Information

        Our website address is www.silabs.com. Our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 are available through the investor relations page of our website free of charge as soon as reasonably practicable after we electronically file such material with, or furnish it to, the Securities and Exchange Commission (SEC). Our website and the information contained therein or connected thereto are not intended to be incorporated into this Annual Report on Form 10-K.

Item 1A.    Risk Factors

Risks Related to our Business

We may not be able to maintain our historical growth and may experience significant period-to-period fluctuations in our revenues and operating results, which may result in volatility in our stock price

        Although we have generally experienced revenue growth in our history, we may not be able to sustain this growth. We may also experience significant period-to-period fluctuations in our revenues and operating results in the future due to a number of factors, and any such variations may cause our stock price to fluctuate. In some future period our revenues or operating results may be below the expectations of public market analysts or investors. If this occurs, our stock price may drop, perhaps significantly.

        A number of factors, in addition to those cited in other risk factors applicable to our business, may contribute to fluctuations in our revenues and operating results, including:


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        The markets for consumer electronics, for example, are characterized by rapid fluctuations in demand and seasonality that result in corresponding fluctuations in the demand for our products that are incorporated in such devices. Additionally, the rate of technology acceptance by our customers results in fluctuating demand for our products as customers are reluctant to incorporate a new IC into their products until the new IC has achieved market acceptance. Once a new IC achieves market acceptance, demand for the new IC can quickly accelerate to a point and then level off such that rapid historical growth in sales of a product should not be viewed as indicative of continued future growth. In addition, demand can quickly decline for a product when a new IC product is introduced and receives market acceptance. Due to the various factors mentioned above, the results of any prior quarterly or annual periods should not be relied upon as an indication of our future operating performance.

If we are unable to develop or acquire new and enhanced products that achieve market acceptance in a timely manner, our operating results and competitive position could be harmed

        Our future success will depend on our ability to develop or acquire new products and product enhancements that achieve market acceptance in a timely and cost-effective manner. The development of mixed-signal ICs is highly complex, and we have at times experienced delays in completing the development and introduction of new products and product enhancements. Successful product development and market acceptance of our products depend on a number of factors, including:


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        We cannot provide any assurance that products which we recently have developed or may develop in the future will achieve market acceptance. We have introduced to market or are in development of many products. If our products fail to achieve market acceptance, or if we fail to develop new products on a timely basis that achieve market acceptance, our growth prospects, operating results and competitive position could be adversely affected. The growth of the Internet of Things (IoT)IoT market is dependent on the adoption of industry standards to permit devices to connect and communicate with each other. If the industry cannot agree on a common set of standards, then the growth of the IoT market may be slower than expected.


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Our research and development efforts are focused on a limited number of new technologies and products, and any delay in the development, or abandonment, of these technologies or products by industry participants, or their failure to achieve market acceptance, could compromise our competitive position

        Our products serve as components and solutions in electronic devices in various markets. As a result, we have devoted and expect to continue to devote a large amount of resources to develop products based on new and emerging technologies and standards that will be commercially introduced in the future. Research and development expense during fiscal 20162018 was $199.7$238.3 million, or 28.6%27.5% of revenues. A number of companies are actively involved in the development of these new technologies and standards. Should any of these companies delay or abandon their efforts to develop commercially available products based on new technologies and standards, our research and development efforts with respect to these technologies and standards likely would have no appreciable value. In addition, if we do not correctly anticipate new technologies and standards, or if the products that we develop based on these new technologies and standards fail to achieve market acceptance, our competitors may be better able to address market demand than we would. Furthermore, if markets for these new technologies and standards develop later than we anticipate, or do not develop at all, demand for our products that are currently in development would suffer, resulting in lower sales of these products than we currently anticipate.

Significant litigation over intellectual property in our industry may cause us to become involved in costly and lengthy litigation which could seriously harmadversely affect our business

        In recent years, there has beenThe semiconductor and software industries have experienced significant litigation in the United States involving patents and other intellectual property rights. From time to time, wethird parties, including non-practicing entities, allege intellectual property infringement by our products, our customers' products, or products using technologies or communications standards used in our industry. We also receive letters from various industry participants alleging infringement of patents, trademarks or misappropriation of trade secrets orcommunications from customers or suppliers requesting indemnification for claimsallegations brought against them by third parties. The exploratory natureSome of these inquiries has become relatively commonallegations have resulted, and may result in the semiconductor industry.future, in our involvement in litigation. We respond when we deem appropriatehave certain contractual obligations to defend and as advised by legal counsel.indemnify our customers from certain infringement claims. We also have been involved in litigation to protect our intellectual property rights in the past and may become involved in such litigation again in the future. We are currently involved in

        Given the unpredictable nature of litigation in which we and certainthe complexity of our customers have been accused of patent infringement related to our television tuner products. In the future,technology, we may become involvednot prevail in additional litigation to defend allegations of infringement asserted by others, both directly and indirectly as a result of certain industry-standard indemnities we may offer to our customers or suppliers.any such litigation. Legal proceedings could subject us to significant liability, for damages or invalidate our proprietary rights.rights, or harm our businesses and our ability to compete. Legal proceedings initiated by us to protect our intellectual property rights could also result in counterclaims or countersuits against us. Any litigation, regardless of its outcome would likelyor merit, could be time-consuming and expensive to resolve and wouldcould divert our management's time and attention. Intellectual property litigation also could force us to take specific actions, including:


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Any acquisitions we make could disrupt our business and harm our financial condition

        As part of our growth and product diversification strategy, we continue to evaluate opportunities to acquire other businesses, intellectual property or technologies that would complement our current


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offerings, expand the breadth of our markets or enhance our technical capabilities. TheOn April 18, 2018, we acquired the Z-Wave business from Sigma Designs. This acquisition and other acquisitions that we have made and may make in the future entail a number of risks that could materially and adversely affect our business and operating results, including:

        Future acquisitions also could cause us to incur debt or contingent liabilities or cause us to issue equity securities that could negatively impact the ownership percentages of existing shareholders.

We may be unable to protect our intellectual property, which would negatively affect our ability to compete

        Our products rely on our proprietary technology, and we expect that future technological advances made by us will be critical to sustain market acceptance of our products. Therefore, we believe that the protection of our intellectual property rights is and will continue to be important to the success of our business. We rely on a combination of patent, copyright, trademark and trade secret laws and restrictions on disclosure to protect our intellectual property rights. We also enter into confidentiality or license agreements with our employees, consultants, intellectual property providers and business partners, and control access to and distribution of our documentation and other proprietary information. Despite these efforts, unauthorized parties may attempt to copy or otherwise obtain and use our proprietary technology. Monitoring unauthorized use of our technology is difficult, and we cannot be certain that the steps we have taken will prevent unauthorized use of our technology, particularly in foreign countries where the laws may not protect our proprietary rights as fully as in the United States. We cannot be certain that patents will be issued as a result of our pending applications nor can we be certain that any issued patents would protect or benefit us or give us adequate protection from competing products. For example, issued patents may be circumvented or challenged and declared invalid or unenforceable. We also cannot be certain that others will not develop effective competing technologies on their own.


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Failure to manage our distribution channel relationships could impede our future growth

        The future growth of our business will depend in large part on our ability to manage our relationships with current and future distributors and sales representatives, develop additional channels for the distribution and sale of our products and manage these relationships. During fiscal 2016, 68%2018, 71% of our revenue was derived from distributors. As we execute our indirect sales strategy, we must manage the potential conflicts that may arise with our direct sales efforts. For example, conflicts with


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a distributor may arise when a customer begins purchasing directly from us rather than through the distributor. The inability to successfully execute or manage a multi-channel sales strategy could impede our future growth. In addition, relationships with our distributors often involve the use of price protection and inventory return rights. This often requires a significant amount of sales management's time and system resources to manage properly. Because we consolidated our distribution relationships to a single global distributor, Arrow Electronics, in fiscal 2018, termination of the relationship with Arrow Electronics, either by us or by Arrow Electronics, could result in a temporary or permanent loss of revenue. If Arrow Electronics fails to effectively market and sell our products in full compliance with applicable laws, or if we are unable to maintain our existing relationship with Arrow Electronics, we may not be able to find a distributor with the scale and resources of Arrow Electronics, maintain existing levels of international revenue or realize expected long-term international revenue growth. We may not be successful in finding suitable alternative global distributors on satisfactory terms, or at all, and this could adversely affect our ability to effectively sell our solutions in certain geographical locations or to certain end customers.

We depend on a limited number of customers for a significant portion of our revenues, and the loss of, or a significant reduction in orders from, any key customer could significantly reduce our revenues

        The loss of any of our key customers, or a significant reduction in sales to any one of them, would significantly reduce our revenues and adversely affect our business. During fiscal 2016,2018, our ten largest customers accounted for 25%20% of our revenues. Some of the markets for our products are dominated by a small number of potential customers. Therefore, our operating results in the foreseeable future will continue to depend on our ability to sell to these dominant customers, as well as the ability of these customers to sell products that incorporate our IC products. In the future, these customers may decide not to purchase our products at all, purchase fewer products than they did in the past or alter their purchasing patterns, particularly because:

        Our customers regularly evaluate alternative sources of supply in order to diversify their supplier base, which increases their negotiating leverage with us and protects their ability to secure these components. We believe that any expansion of our customers' supplier bases could have an adverse effect on the prices we are able to charge and volume of product that we are able to sell to our customers, which would negatively affect our revenues and operating results.

We are subject to increased inventory risks and costs because we build our products based on forecasts provided by customers before receiving purchase orders for the products

        In order to ensure availability of our products for some of our largest customers, we start the manufacturing of our products in advance of receiving purchase orders based on forecasts provided by these customers. However, these forecasts do not represent binding purchase commitments and we do not recognize sales for these products until they are shipped to the customer. As a result, we incur inventory and manufacturing costs in advance of anticipated sales. Because demand for our


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products may not materialize, manufacturing based on forecasts subjects us to increased risks of high inventory carrying costs, increased obsolescence and increased operating costs. These inventory risks are exacerbated when our customers purchase indirectly through contract manufacturers or hold


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component inventory levels greater than their consumption rate because this causes us to have less visibility regarding the accumulated levels of inventory for such customers. A resulting write-off of unusable or excess inventories would adversely affect our operating results.

Our products are complex and may contain errors which could lead to liability, an increase in our costs and/or a reduction in our revenues

        Our products are complex and may contain errors, particularly when first introduced and/or aswhen new versions are released. Our products are increasingly being designed in more complex processes, includeincluding higher levels of software and hardware integration in modules and system-level solutions and/or include elements provided by third parties which further increase the risk of errors. We rely primarily on our in-house testing personnel to design test operations and procedures to detect any errors or vulnerabilities prior to delivery of our products to our customers.

        Should problems occur in the operation or performance of our products, we may experience delays in meeting key introduction dates or scheduled delivery dates to our customers. These errors could also could cause us to incur significant re-engineering costs, divert the attentiondiversion of our engineering personnelpersonnel's attention from our product development efforts and cause significant customer relations and business reputation problems. Any defects could result in refunds, product replacement, product recall or other liability or require product replacement or recall.liability. Any of the foregoing could impose substantial costs and harm our business.

        Product liability, data breach or cyber liability claims may be asserted with respect to our products. Many of our products focus on wireless connectivity and the IoT market and such connectivity may make these products particularly susceptible to cyber-attacks. Our products are typically sold at prices that are significantly lower than the cost of the end-products into which they are incorporated. A defect, failure or failurevulnerability in our product could cause failure in our customer's end-product, so we could face claims for damages that are disproportionately higher than the revenues and profits we receive from the products involved. Furthermore, product liability risks are particularly significant with respect to medical and automotive applications because of the risk of serious harm to users of these products.end-products. There can be no assurance that any insurance we maintain will sufficiently protect us from any such claims.

We rely on third parties to manufacture, assemble and test our products and the failure to successfully manage our relationships with our manufacturers and subcontractors would negatively impact our ability to sell our products

        We do not have our own wafer fab manufacturing facilities. Therefore, we rely on third-party vendors to manufacture the products we design. We also currently rely on Asian third-party assembly subcontractors to assemble and package the silicon chips provided by the wafers for use in final products. Additionally, we rely on these offshore subcontractors for a substantial portion of the testing requirements of our products prior to shipping. We expect utilization of third-party subcontractors to continue in the future.

        The cyclical nature of the semiconductor industry drives wide fluctuations in available capacity at third-party vendors. On occasion, we have been unable to adequately respond to unexpected increases in customer demand due to capacity constraints and, therefore, were unable to benefit from this incremental demand. We may be unable to obtain adequate foundry, assembly or test capacity from our third-party subcontractors to meet our customers' delivery requirements even if we adequately forecast customer demand.


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        There are significant risks associated with relying on these third-party foundries and subcontractors, including:


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        We typically do not have long-term supply contracts with our third-party vendors which obligate the vendor to perform services and supply products to us for a specific period, in specific quantities, and at specific prices. Our third-party foundry, assembly and test subcontractors typically do not guarantee that adequate capacity will be available to us within the time required to meet demand for our products. In the event that these vendors fail to meet our demand for whatever reason, we expect that it would take up to 12 months to transition performance of these services to new providers. Such a transition may also require qualification of the new providers by our customers or their end customers.

        Most of the silicon wafers for the products that we have sold were manufactured either by Taiwan Semiconductor Manufacturing Co. (TSMC)TSMC or TSMC's affiliates or by Semiconductor Manufacturing International Corporation (SMIC).SMIC. Our customers typically complete their own qualification process. If we fail to properly balance customer demand across the existing semiconductor fabrication facilities that we utilize or are required by our foundry partners to increase, or otherwise change the number of fab lines that we utilize for our production, we might not be able to fulfill demand for our products and may need to divert our engineering resources away from new product development initiatives to support the fab line transition, which would adversely affect our operating results.

Our customers require our products to undergo a lengthy and expensive qualification process without any assurance of product sales

        Prior to purchasing our products, our customers require that our products undergo an extensive qualification process, which involves testing of the products in the customer's system as well as rigorous reliability testing. This qualification process may continue for six months or longer. However, qualification of a product by a customer does not ensure any sales of the product to that customer. Even after successful qualification and sales of a product to a customer, a subsequent revision to the product or software, changes in the IC's manufacturing process or the selection of a new supplier by us may require a new qualification process, which may result in delays and in us holding excess or obsolete inventory. After our products are qualified, it can take an additional six months or more before the customer commences volume production of components or devices that incorporate our products. Despite these uncertainties, we devote substantial resources, including design, engineering, sales, marketing and management efforts, toward qualifying our products with customers in anticipation of sales. If we are unsuccessful or delayed in qualifying any of our products with a customer, such failure or delay would preclude or delay sales of such product to the customer, which may impede our growth and cause our business to suffer.


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We are a global company, which subjects us to additional business risks including logistical and financial complexity, political instability and currency fluctuations

        We have established international subsidiaries and have opened offices in international markets to support our activities in Asia, the Americas and Europe. This has included the establishment of a headquarters in Singapore for non-U.S. operations. The percentage of our revenues derived from outside of the United States was 86%83% during fiscal 2016.2018. We may not be able to maintain or increase


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global market demand for our products. Our international operations are subject to a number of risks, including:

        To date, substantially all of our sales to international customers and purchases of components from international suppliers have been denominated in U.S. dollars. As a result, an increase in the value of the U.S. dollar relative to foreign currencies could make our products more expensive for our international customers to purchase, thus rendering our products less competitive. Similarly, a decrease in the value of the U.S. dollar could reduce our buying power with respect to international suppliers.

Our inability to manage growth could materially and adversely affect our business

        Our past growth has placed, and any future growth of our operations will continue to place, a significant strain on our management personnel, systems and resources. We anticipate that we will need to implement a variety of new and upgraded sales, operational and financial enterprise-wide systems, information technology infrastructure, procedures and controls, including the improvement of our accounting and other internal management systems to manage this growth and maintain compliance with regulatory guidelines, including Sarbanes-Oxley Act requirements. To the extent our business grows, our internal management systems and processes will need to improve to ensure that we remain in compliance. We also expect that we will need to continue to expand, train, manage and motivate our workforce. All of these endeavors will require substantial management effort, and we anticipate that we will require additional management personnel and internal processes to manage these efforts and to plan for the succession from time to time of certain persons who have been key management and technical personnel. If we are unable to effectively manage our expanding global operations, including our international headquarters in Singapore, our business could be materially and adversely affected.


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We have a material weakness in our internal control over financial reporting and if we are unable to implement and maintain effective internal control over financial reporting, or our independent registered public accounting firm is unable to provide an unqualified report thereon, we could be materially adversely effected

        We have identified a material weakness that existed as of the end of our fiscal 2018 regarding our internal controls over business combinations, primarily the maintenance of sufficient contemporaneous documentation of management review controls over assumptions used in the valuation of acquired intangible assets and related recording of goodwill. As a result of this material weakness, management concluded that our disclosure controls and procedures and internal control over financial reporting were not effective as of December 29, 2018.

        Unless and until this material weakness has been remediated, or should new material weaknesses arise or be discovered in the future, material misstatements could occur and go undetected in our interim or annual consolidated financial statements and we may be required to restate our financial statements. In addition, we may experience delays in satisfying our reporting obligations or to comply with Securities and Exchange Commission rules and regulations, which could result in investigations and sanctions by regulatory authorities. Any of these results could adversely affect our business and the value of our common stock.

Our products incorporate technology licensed from third parties

        We incorporate technology (including software) licensed from third parties in our products. We could be subjected to claims of infringement regardless of our lack of involvement in the development of the licensed technology. Although a third-party licensor is typically obligated to indemnify us if the licensed technology infringes on another party's intellectual property rights, such indemnification is typically limited in amount and may be worthless if the licensor becomes insolvent. SeeSignificant litigation over intellectual property in our industry may cause us to become involved in costly and lengthy litigation which could seriously harm our business. Furthermore, any failure of third-party technology to perform properly would adversely affect sales of our products incorporating such technology.


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We are subject to risks relating to product concentration

        We derive a substantial portion of our revenues from a limited number of products, and we expect these products to continue to account for a large percentage of our revenues in the near term. Continued market acceptance of these products, is therefore, critical to our future success. In addition, substantially all of our products that we have sold include technology related to one or more of our issued U.S. patents. If these patents are found to be invalid or unenforceable, our competitors could introduce competitive products that could reduce both the volume and price per unit of our products. Our business, operating results, financial condition and cash flows could therefore be adversely affected by:


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We are subject to credit risks related to our accounts receivable

        We do not generally obtain letters of credit or other security for payment from customers, distributors or contract manufacturers. Accordingly, we are not protected against accounts receivable default or bankruptcy by these entities. Our ten largest customers or distributors represent a substantial majority of our accounts receivable. If any such customer or distributor, or a material portion of our smaller customers or distributors, were to become insolvent or otherwise not satisfy their obligations to us, we could be materially harmed.

We depend on our key personnel to manage our business effectively in a rapidly changing market, and if we are unable to retain our current personnel and hire additional personnel, our ability to develop and successfully market our products could be harmed

        We believe our future success will depend in large part upon our ability to attract and retain highly skilled managerial, engineering, sales and marketing personnel. We believe that our future success will be dependent on retaining the services of our key personnel, developing their successors and certain internal processes to reduce our reliance on specific individuals, and on properly managing the transition of key roles when they occur. There is currently a shortage of qualified personnel with significant experience in the design, development, manufacturing, marketing and sales of analog and mixed-signal products. In particular, there is a shortage of engineers who are familiar with the intricacies of the design and manufacturability of analog elements, and competition for such personnel is intense. Our key technical personnel represent a significant asset and serve as the primary source for our technological and product innovations. We may not be successful in attracting and retaining sufficient numbers of technical personnel to support our anticipated growth. The loss of any of our key employees or the inability to attract or retain qualified personnel both in the United States and internationally, including engineers, sales, applications and marketing personnel, could delay the development and introduction of, and negatively impact our ability to sell, our products.


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Any dispositions could harm our financial condition

        Any disposition of a product line would entail a number of risks that could materially and adversely affect our business and operating results, including:

Our stock price may be volatile

        The market price of our common stock has been volatile in the past and may be volatile in the future. The market price of our common stock may be significantly affected by the following factors:


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        The stock market has experienced extreme volatility that often has been unrelated to the performance of particular companies. These market fluctuations may cause our stock price to fall regardless of our performance.


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Most of our current manufacturers, assemblers, test service providers, distributors and customers are concentrated in the same geographic region, which increases the risk that a natural disaster, epidemic, labor strike, war or political unrest could disrupt our operations or sales

        Most of our foundries and several of our assembly and test subcontractors' sites are located in Taiwan and most of our other foundry, assembly and test subcontractors are located in the Pacific Rim region. In addition, many of our customers are located in the Pacific Rim region. The risk of earthquakes in Taiwan and the Pacific Rim region is significant due to the proximity of major earthquake fault lines in the area. Earthquakes, tsunamis, fire, flooding, lack of water or other natural disasters, an epidemic, political unrest, war, labor strikes or work stoppages in countries where our semiconductor manufacturers, assemblers and test subcontractors are located, likely would result in the disruption of our foundry, assembly or test capacity. There can be no assurance that alternate capacity could be obtained on favorable terms, if at all.

        A natural disaster, epidemic, labor strike, war or political unrest where our customers' facilities are located would likely reduce our sales to such customers. North Korea's recent geopolitical maneuverings, including nuclear weapons and long-range missile testing, have created unrest. Such unrest could create economic uncertainty or instability, could escalate to war or otherwise adversely affect South Korea and our South Korean customers and reduce our sales to such customers, which would materially and adversely affect our operating results. In addition, a significant portion of the assembly and testing of our products occurs in South Korea. Any disruption resulting from these events could also cause significant delays in shipments of our products until we are able to shift our manufacturing, assembling or testing from the affected subcontractor to another third-party vendor.


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The semiconductor manufacturing process is highly complex and, from time to time, manufacturing yields may fall below our expectations, which could result in our inability to satisfy demand for our products in a timely manner and may decrease our gross margins due to higher unit costs

        The manufacturing of our products is a highly complex and technologically demanding process. Although we work closely with our foundries and assemblers to minimize the likelihood of reduced manufacturing yields, we have from time to time experienced lower than anticipated manufacturing yields. Changes in manufacturing processes or the inadvertent use of defective or contaminated materials could result in lower than anticipated manufacturing yields or unacceptable performance deficiencies, which could lower our gross margins. If our foundries fail to deliver fabricated silicon wafers of satisfactory quality in a timely manner, we will be unable to meet our customers' demand for our products in a timely manner, which would adversely affect our operating results and damage our customer relationships.

We depend on our customers to support our products, and some of our customers offer competing products

        We rely on our customers to provide hardware, software, intellectual property indemnification and other technical support for the products supplied by our customers. If our customers do not provide the required functionality or if our customers do not provide satisfactory support for their products, the demand for these devices that incorporate our products may diminish or we may otherwise be materially adversely affected. Any reduction in the demand for these devices would significantly reduce our revenues.

        In certain products, some of our customers offer their own competitive products. These customers may find it advantageous to support their own offerings in the marketplace in lieu of promoting our products.


TableOur convertible senior notes could adversely affect our operating results and financial condition

        Upon conversion, our convertible senior notes may be settled in cash, shares of Contentsour common stock or a combination of cash and shares, at our election. We intend to settle the principal amount of the notes in cash. If we do not have adequate cash available, we may not be able to settle the principal amount in cash. In such case, we will be required to settle the principal amount in stock, which would result in immediate, and likely material, dilution to the ownership interests of our existing stockholders. Any sales in the public market of our common stock issuable upon such conversion could adversely affect prevailing market prices of our common stock.

        Following any conclusion that we no longer have the ability to settle the convertible senior notes in cash, we will be required on a going forward basis to change our accounting policy for earnings per share from the treasury stock method to the if-converted method. Earnings per share may be lower under the if-converted method as compared to the treasury stock method.

        The principal balance of the convertible senior notes was separated into liability and equity components, which were recorded initially at fair value. The excess of the principal amount of the liability component over its carrying amount represents the debt discount, which is accreted to interest expense over the term of the notes using the effective interest method. Accordingly, we will report higher interest expense because of the recognition of both the debt discount amortization and the notes' coupon interest.

Our debt could adversely affect our operations and financial condition

        We believe we have the ability to service our debt, under our credit facilities, but our ability to make the required payments thereunder when due depends upon our future performance, which will be subject to general economic conditions, industry cycles and other factors affecting our operations, including risk factors described under this Item 1A,herein, many of which are beyond our control. Our credit facilitiesfacility also containcontains covenants, including


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financial covenants. If we breach any of the covenants under our credit facilitiesfacility and do not obtain appropriate waivers, then, subject to any applicable cure periods, our outstanding indebtedness thereunder could be declared immediately due and payable.

We could seek to raise additional debt or equity capital in the future, but additional capital may not be available on terms acceptable to us, or at all

        We believe that our existing cash, cash equivalents, investments and credit under our credit facilitiesfacility will be sufficient to meet our working capital needs, capital expenditures, investment requirements and commitments for at least the next 12 months. However, our ability to borrow further under the credit facilitiesfacility is dependent upon our ability to satisfy various conditions, covenants and representations. It is possible that we may need to raise additional funds to finance our activities or to facilitate acquisitions of other businesses, products, intellectual property or technologies. We believe we could raise these funds, if needed, by selling equity or debt securities to the public or to selected investors. In addition, even though we may not need additional funds, we may still elect to sell additional equity or debt securities or obtain credit facilities for other reasons. However, we may not be able to obtain additional funds on favorable terms, or at all. If we decide to raise additional funds by issuing equity or convertible debt securities, the ownership percentages of existing shareholders would be reduced.

We have limited resources compared to some of our current and potential competitors and we may not be able to compete effectively and increase market share

        Some of our current and potential competitors have longer operating histories, significantly greater resources and name recognition and a larger base of customers than we have. As a result, these competitors may have greater credibility with our existing and potential customers. They also may be able to adopt more aggressive pricing policies and devote greater resources to the development, promotion and sale of their products than we can to ours. In addition, some of our current and potential competitors have already established supplier or joint development relationships with the decision makers at our current or potential customers. These competitors may be able to leverage their existing relationships to discourage their customers from purchasing products from us or persuade them to replace our products with their products. Our competitors may also offer bundled solutions offering a more complete product despite the technical merits or advantages of our products. These competitors may elect not to support our products which could complicate our sales efforts. These and other competitive pressures may prevent us from competing successfully against current or future competitors, and may materially harm our business. Competition could decrease our prices, reduce our sales, lower our gross margins and/or decrease our market share.

Provisions in our charter documents and Delaware law could prevent, delay or impede a change in control of us and may reduce the market price of our common stock

        Provisions of our certificate of incorporation and bylaws could have the effect of discouraging, delaying or preventing a merger or acquisition that a stockholder may consider favorable. For example, our certificate of incorporation and bylaws provide for:


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        We also are subject to the anti-takeover laws of Delaware which may discourage, delay or prevent someone from acquiring or merging with us, which may adversely affect the market price of our common stock.

Risks related to our industry

We are subject to the cyclical nature of the semiconductor industry, which has been subject to significant fluctuations

        The semiconductor industry is highly cyclical and is characterized by constant and rapid technological change, rapid product obsolescence and price erosion, evolving standards, short product life cycles and wide fluctuations in product supply and demand. The industry has experienced significant fluctuations, often connected with, or in anticipation of, maturing product cycles and new product introductions of both semiconductor companies' and their customers' products and fluctuations in general economic conditions. Deteriorating general worldwide economic conditions, including reduced economic activity, concerns about credit and inflation, increased energy costs, decreased consumer confidence, reduced corporate profits, decreased spending and similar adverse business conditions, would make it very difficult for our customers, our vendors, and us to accurately forecast and plan future business activities and could cause U.S. and foreign businesses to slow spending on our products. We cannot predict the timing, strength, or duration of any economic slowdown or economic recovery. If the economy or markets in which we operate deteriorate, our business, financial condition, and results of operations would likely be materially and adversely affected.

        Downturns have been characterized by diminished product demand, production overcapacity, high inventory levels and accelerated erosion of average selling prices. In the recent past, weWe believe the semiconductor industry sufferedis currently suffering a downturn due in large part to adverse macroeconomic conditions, characterized by a slowdown in overall GDP performance and factory activity in certain regions, particularly in China , higher levels of customer inventory, the global creditimpact of tariffs on trade relations, and financial markets, including diminished liquidity and credit availability, declines in consumer confidence, declines in economic growth, increased unemployment rates and generalgreater overall uncertainty regarding the economy. Such downturnsThis downturn has had, and may continue to have, a material adverse effect on our business and operating results.

        Upturns have been characterized by increased product demand and production capacity constraints created by increased competition for access to third-party foundry, assembly and test capacity. We are dependent on the availability of such capacity to manufacture, assemble and test our products. None of our third-party foundry, assembly or test subcontractors have provided assurances that adequate capacity will be available to us.

The average selling prices of our products could decrease rapidly which may negatively impact our revenues and gross margins

        We may experience substantial period-to-period fluctuations in future operating results due to the erosion of our average selling prices. We have reduced the average unit price of our products in anticipation of or in response to competitive pricing pressures, new product introductions by us or our


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competitors and other factors. If we are unable to offset any such reductions in our average selling prices by increasing our sales volumes, increasing our sales content per application or reducing production costs, our gross margins and revenues will suffer. To maintain our gross margin percentage, we will need to develop and introduce new products and product enhancements on a timely basis and continually reduce our costs. Our failure to do so could cause our revenues and gross margin percentage to decline.


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Competition within the numerous markets we target may reduce sales of our products and reduce our market share

        The markets for semiconductors in general, and for mixed-signal products in particular, are intensely competitive. We expect that the market for our products will continually evolve and will be subject to rapid technological change. In addition, as we target and supply products to numerous markets and applications, we face competition from a relatively large number of competitors. We compete with Analog Devices, Broadcom, Conexant, Cypress, IDT, Marvell Technology Group,Infineon, Maxim Integrated Products, MaxLinear, Microchip, Microsemi, Nordic Semiconductor, NXP Semiconductors, Qualcomm, Renesas, STMicroelectronics, Synaptics, Texas Instruments Vectron International and others. We expect to face competition in the future from our current competitors, other manufacturers and designers of semiconductors, and start-up semiconductor design companies. As the markets for communications products grow, we also may face competition from traditional communications device companies. These companies may enter the mixed-signal semiconductor market by introducing their own products or by entering into strategic relationships with or acquiring other existing providers of semiconductor products. In addition, large companies may restructure their operations to create separate companies or may acquire new businesses that are focused on providing the types of products we produce or acquire our customers.

We may be the victim of cyber-attacks against our productsbusiness disruptions and our networks,security breaches, including cyber-attacks, which could lead to liability andor could damage our reputation and financial results

        ManyInformation technology system and/or network disruptions, regardless of our products focus on wireless connectivitythe cause, but including acts of sabotage, error, or other actions, could harm the company's operations. Failure to effectively prevent, detect, and recover from security breaches, including cyber-attacks, could result in the IoT marketmisuse of company assets, disruption to the company, diversion of management resources, regulatory inquiries, legal claims or proceedings, reputational damage, loss of sales and such connectivity may make these products particularly susceptibleother costs to cyber-attacks.the company. We routinely face attacks attemptingthat attempt to breach our security protocols, gain access to or disrupt our computerized systems or steal proprietary company, customer, partner or employee information. These attacks are sometimes successful. WeThese attacks may be subjectdue to security breaches, employee error, theft, malfeasance, phishing schemes, ransomware, faulty password or data security management, or other irregularities. The theft, loss, destruction, unavailability or misuse of personal or business data collected, used, stored or transferred by us to run our business could result in increased security costs or costs related to defending legal claims. Industrial espionage, theft or loss of our intellectual property data could lead to counterfeit products or harm the competitive position of our products and services. Costs to complyimplement, test and maintain measures to promote compliance with and implement privacy-relatedapplicable privacy and data protection measuressecurity laws as well as to protect the overall security of our system could be significant. Federal, state or international privacy-related or data protection laws and regulations could result in proceedings against us by governmental entities or others. Attempted or successful attacks against our products and services could damage our reputation with customers or users and reduce demand for our products and services.

Changes in the Privacy and Data Security/Protection Laws Could Have an Adverse Effect on our Operations

        Federal, state and international privacy-related or data protection laws and regulations could have an adverse effect on our operations. Complying with these laws and the possibility of proceedings against us by governmental entities or others in relation to these laws could increase operational costs. In May 2018, the European Union's General Data Protection Regulation ("GDPR") went into effect, replacing the EU's 1995 Data Protection Directive. The costs of compliance with the GDPR and the potential for fines and penalties in the event of a breach of the GDPR may have an adverse effect on our operations.


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We may be subject to information technology failures that could damage our reputation, business operations and financial condition

        We rely on information technology for the effective operation of our business. Our systems are subject to damage or interruption from a number of potential sources, including natural disasters, accidents, power disruptions, telecommunications failures, acts of terrorism or war, computer viruses, theft, physical or electronic break-ins, cyber-attacks, sabotage, vandalism, or similar events or disruptions. Our security measures may not detect or prevent such security breaches. Any such


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compromise of our information security could result in the theft or unauthorized publication or use of our confidential business or proprietary information, result in the unauthorized release of customer, supplier or employee data, result in a violation of privacy or other laws, expose us to a risk of litigation or damage our reputation. In addition, our inability to use or access information systems at critical points in time could unfavorably impact the timely and efficient operation of our business, which could negatively affect our business and operating results.

        Third parties with which we conduct business, such as foundries, assembly and test contractors, distributors and customers, have access to certain portions of our sensitive data. In the event that these third parties do not properly safeguard our data that they hold, security breaches could result and negatively impact our reputation, business operations and financial results.

Our products must conform to industry standards and technology in order to be accepted by end users in our markets

        Generally, our products comprise only a part of a device. All components of such devices must uniformly comply with industry standards in order to operate efficiently together. We depend on companies that provide other components of the devices to support prevailing industry standards. Many of these companies are significantly larger and more influential in affecting industry standards than we are. Some industry standards may not be widely adopted or implemented uniformly, and competing standards may emerge that may be preferred by our customers or end users. If larger companies do not support the same industry standards that we do, or if competing standards emerge, market acceptance of our products could be adversely affected which would harm our business.

        Products for certain applications are based on industry standards that are continually evolving. Our ability to compete in the future will depend on our ability to identify and ensure compliance with these evolving industry standards. The emergence of new industry standards could render our products incompatible with products developed by other suppliers. As a result, we could be required to invest significant time and effort and to incur significant expense to redesign our products to ensure compliance with relevant standards. If our products are not in compliance with prevailing industry standards for a significant period of time, we could miss opportunities to achieve crucial design wins.

        Our pursuit of necessary technological advances may require substantial time and expense. We may not be successful in developing or using new technologies or in developing new products or product enhancements that achieve market acceptance. If our products fail to achieve market acceptance, our growth prospects, operating results and competitive position could be adversely affected.

Customer demands and new regulations related to conflict-free minerals may adversely affect us

        The Dodd-Frank Wall Street Reform and Consumer Protection Act imposes new disclosure requirements regarding the use of "conflict" minerals mined from the Democratic Republic of Congo and adjoining countries in products, whether or not these products are manufactured by third parties. These new requirements could affect the pricing, sourcing and availability of minerals used in the manufacture of semiconductor devices (including our products). There will be additional costs associated with complying with the disclosure requirements, such as costs related to determining the source of any conflict minerals used in our products. Our supply chain is complex and we may be unable to verify the origins for all metals used in our products. We may also encounter challenges with our customers and stockholders if we are unable to certify that our products are conflict free.

Item 1B.    Unresolved Staff Comments

        None.


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Item 2.    Properties

        Our corporate headquarters, housing engineering, sales and marketing, administration and test operations, is located in Austin, Texas. Our headquarters facilities consist of two buildings, which we own, that are located on land which we have leased through 2099. The buildings contain approximately 441,000 square feet of floor space, of which approximately 130,000 square feet were leased to other tenants. In addition to these properties, we lease smaller facilities in various locations in the United States, Brazil, Canada, China, Finland, France, Germany, Hungary, India, Italy, Japan, Norway, Singapore, South Korea, Taiwan and the United Kingdom for engineering, sales and marketing, administrative and manufacturing support activities. We believe that these facilities are suitable and adequate to meet our current operating needs.

Item 3.    Legal Proceedings

Patent Litigation

        On January 21, 2014, Cresta Technology Corporation ("Cresta Technology"), a Delaware corporation, filed a lawsuit against us, Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., LG Electronics Inc. and LG Electronics U.S.A., Inc. in the United States District Court in the District of Delaware, alleging infringement of three United States Patents (the "Cresta Patents"). The Delaware District Court action has been stayed.

        On January 28, 2014, Cresta Technology also filed a complaint with the United States International Trade Commission ("ITC") alleging infringement of the same patents. On September 29, 2015, the ITC issued its Final Determination, finding that all the patent claims asserted against our products were either invalid or not infringed and that Cresta Technology failed to establish the ITC's domestic industry requirement. The ITC found no violation by us and terminated the investigation. On November 30, 2015, Cresta Technology filed an appeal of the ITC decision to the Federal Circuit. On March 8, 2016, pursuant to a stipulated dismissal, the Federal Circuit dismissed Cresta Technology's appeal in its entirety.

        In a parallel process, we challenged the validity of the claims of the Cresta Patents asserted in the ITC investigation through a series ofInter-Partes Review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB) of the United States Patent and Trademark Office (USPTO). On October 21, 2015, the USPTO issued final written decisions on a first set of reviewed claims finding all of the reviewed claims invalid. On December 18, 2015, Cresta Technology appealed those adverse decisions to the United States Court of Appeals for the Federal Circuit as to this first USPTO determination. The Federal Circuit summarily affirmed the USPTO's first determination on November 8, 2016 and the mandate issued on December 16, 2016, rendering the USPTO's determination final.

        The USPTO instituted a second set of IPR proceedings against a second set of the remaining claims. On August 11, 2016, the PTAB issued its final written decisions in these proceedings and found all of these remaining claims unpatentable. On October 13, 2016, the patent owner, now known as CF Crespe LLC, filed a notice of appeal with the Federal Circuit seeking to overturn the USPTO's final written decision as to a subset of the claims found unpatentable in this second set of IPR proceedings. That appeal is currently in briefing. No hearing date has been set.

        On March 18, 2016, Cresta Technology filed for chapter 7 bankruptcy in the United States Bankruptcy Court for the Northern District of California.

        On May 13, 2016, the Bankruptcy Court approved an agreement for DBD Credit Funding LLC ("DBD") to buy Cresta Technology's entire IP portfolio and certain related litigation. Following that sale, DBD (through an apparent assignee, CF Crespe LLC) has substituted in the Delaware District Court action, the appeal proceedings at the U.S. Court of Appeals for the Federal Circuit for the first


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set of IPR proceedings and the USPTO PTAB proceedings for the second set of IPRs replacing Cresta Technology.

        On July 16, 2014, we filed a lawsuit against Cresta Technology in the United States District Court in the Northern District of California alleging infringement of six United States Patents. We are seeking a permanent injunction and an award of damages and attorney fees. As a result of the chapter 7 bankruptcy filing by Cresta Technology, these proceedings were stayed. However, as a result of the May 13, 2016 sale order by the Bankruptcy Court, DBD and CF Crespe LLC were ordered to substitute in as Defendant for Cresta Technology. DBD and CF Crespe LLC have appealed the Bankruptcy Court's order in that regard. Subject to that appeal, the Company's patent infringement trial against DBD and CF Crespe LLC is set to begin October 2, 2017.

        As is customary in the semiconductor industry, we provide indemnification protection to our customers for intellectual property claims related to our products. We have not accrued any material liability on our Consolidated Balance Sheet related to such indemnification obligations in connection with the Cresta Technology litigation.

        We intend to continue to vigorously defend against Cresta Technology's (now DBD and CF Crespe LLC's) allegations and to continue to pursue our claims against Cresta and their patents. At this time, we cannot predict the outcome of these matters or the resulting financial impact to us, if any.

Other

        We are involved in various other legal proceedings that have arisen in the normal course of business. While the ultimate results of these matters cannot be predicted with certainty, we do not expect them to have a material adverse effect on our Consolidated Financial Statements.

Item 4.    Mine Safety Disclosures

        Not applicable.


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Part II

Item 5.    Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Market Information and Holders

        Our registration statement (Registration No. 333-94853) under the Securities Act of 1933, as amended, relating to our initial public offering of our common stock became effective on March 23, 2000. Our common stock is quoted on the NASDAQ National Market (NASDAQ) under the symbol "SLAB". The table below shows the high and low per-share sales prices of our common stock for the periods indicated, as reported by NASDAQ. As of January 23, 2017, there were 85 holders of record of our common stock.

 
 High Low 

Fiscal Year 2015

       

First Quarter

 $52.83 $42.61 

Second Quarter

  58.54  49.85 

Third Quarter

  53.84  39.33 

Fourth Quarter

  54.72  42.06 

Fiscal Year 2016

  
 
  
 
 

First Quarter

 $48.00 $36.56 

Second Quarter

  51.00  42.63 

Third Quarter

  59.35  45.94 

Fourth Quarter

  68.95  55.97 

Dividend Policy

        We have never declared or paid any cash dividends on our common stock and we do not intend to pay cash dividends in the foreseeable future. We currently expect to retain any future earnings to fund the operation and expansion of our business.


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Stock Performance Graph

        The graph depicted below shows a comparison of cumulative total stockholder returns for an investment in Silicon Laboratories Inc. common stock, the NASDAQ Composite Index and the PHLX Semiconductor Index.

Company / Index
 12/31/11 12/29/12 12/28/13 01/03/15 01/02/16 12/31/16 

Silicon Laboratories Inc. 

 $100.00 $95.56 $97.54 $109.42 $111.79 $149.70 

NASDAQ Composite

 $100.00 $115.15 $163.76 $188.49 $201.98 $219.89 

PHLX Semiconductor Index

 $100.00 $105.20 $150.62 $198.57 $195.45 $272.30 

(1)
The graph assumes that $100 was invested in our common stock and in each index at the market close on December 31, 2011, and that all dividends were reinvested. No cash dividends have been declared on our common stock.

(2)
Stockholder returns over the indicated period should not be considered indicative of future stockholder returns.

Issuer Purchases of Equity Securities

        The following table summarizes repurchases of our common stock during the three months ended December 31, 2016 (in thousands, except per share amounts):

Period
 Total Number
of Shares
Purchased
 Average Price
Paid per
Share
 Total Number of
Shares Purchased
as Part of Publicly
Announced Plans
or Programs
 Approximate
Dollar Value of
Shares that May
Yet Be Purchased
Under the Plans
or Programs
 

October 2, 2016 - October 29, 2016

  
 
$

  
 
$

59,474
 

October 30, 2016 - November 26, 2016

  
 
$

  
 
$

59,474
 

November 27, 2016 - December 31, 2016

  
 
$

  
 
$

59,474
 

Total

   $      

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        In August 2015, the Board of Directors authorized a program to repurchase up to $100 million of our common stock through December 2016. In January 2017, the Board of Directors authorized a program to repurchase up to $100 million of our common stock through December 2017. The programs allow for repurchases to be made in the open market or in private transactions, including structured or accelerated transactions, subject to applicable legal requirements and market conditions.

Item 6.    Selected Financial Data

        Please read this selected consolidated financial data in conjunction with "Management's Discussion and Analysis of Financial Condition and Results of Operations," our Consolidated Financial Statements and the notes to those statements included in this Form 10-K.

 
 Fiscal Year 
 
 2016 2015 2014 2013 2012 
 
 (in thousands, except per share data)
 

Consolidated Statements of Income Data

                

Revenues

 
$

697,626
 
$

644,826
 
$

620,704
 
$

580,087
 
$

563,294
 

Operating income

 $66,277 $32,234 $51,421 $64,310 $85,675 

Net income

 $61,494 $29,586 $38,021 $49,819 $63,548 

Earnings per share:

  
 
  
 
  
 
  
 
  
 
 

Basic

 
$

1.47
 
$

0.70
 
$

0.88
 
$

1.17
 
$

1.51
 

Diluted

 $1.45 $0.69 $0.87 $1.14 $1.47 

Consolidated Balance Sheet Data

  
 
  
 
  
 
  
 
  
 
 

Cash, cash equivalents and investments (1)

 
$

300,263
 
$

250,112
 
$

342,614
 
$

286,025
 
$

293,360
 

Working capital

  351,156  280,819  365,223  350,170  361,304 

Total assets

  1,081,844  1,011,463  1,042,561  991,150  871,966 

Long-term obligations

  115,191  108,028  121,191  143,441  115,615 

Total stockholders' equity

  826,958  761,114  758,056  738,562  649,973 

(1)
Reflects repurchases of $41 million, $71 million, $72 million, $26 million and $62 million of our common stock in fiscal 2016, 2015, 2014, 2013 and 2012, respectively. Includes $5 million, $7 million, $7 million, $11 million and $11 million of long-term auction-rate securities investments in fiscal 2016, 2015, 2014, 2013 and 2012, respectively.

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Item 7.    Management's Discussion and Analysis of Financial Condition and Results of Operations

        The following discussion and analysis of financial condition and results of operations should be read in conjunction with the Consolidated Financial Statements and related notes thereto included elsewhere in this report. This discussion contains forward-looking statements. Please see the "Cautionary Statement" and "Risk Factors" above for discussions of the uncertainties, risks and assumptions associated with these statements. Our fiscal year-end financial reporting periods are a 52- or 53-week year ending on the Saturday closest to December 31. Fiscal 2016 and 2015 were 52-week years and ended on December 31, 2016 and January 2, 2016, respectively. Fiscal 2014 was a 53-week year with the extra week occurring in the fourth quarter of the year and ended on January 3, 2015.

Overview

        We are a provider of silicon, software and solutions for the Internet of Things (IoT), Internet infrastructure, industrial, consumer and automotive markets. We solve some of the electronics industry's toughest problems, providing customers with significant advantages in performance, energy savings, connectivity and design simplicity. Mixed-signal integrated circuits (ICs) are electronic components that convert real-world analog signals, such as sound and radio waves, into digital signals that electronic products can process. Therefore, mixed-signal ICs are critical components in products addressing a variety of markets, including industrial, communications, consumer and automotive.

        As a fabless semiconductor company, we rely on third-party semiconductor fabricators in Asia, and to a lesser extent the United States and Europe, to manufacture the silicon wafers that reflect our IC designs. Each wafer contains numerous die, which are cut from the wafer to create a chip for an IC. We rely on third parties in Asia to assemble, package, and, in most cases, test these devices and ship these units to our customers. Testing performed by such third parties facilitates faster delivery of products to our customers (particularly those located in Asia), shorter production cycle times, lower inventory requirements, lower costs and increased flexibility of test capacity.

        Our expertise in analog-intensive, high-performance, mixed-signal ICs and software enables us to develop highly differentiated solutions that address multiple markets. We group our products into the following categories:

    Internet of Things products, which include our microcontroller (MCU), wireless, sensor and analog products;

    Broadcast products, which include our broadcast consumer and automotive products;

    Infrastructure products, which include our timing products (clocks and oscillators), and isolation devices; and

    Access products, which include our Voice over IP (VoIP) products, embedded modems and our Power over Ethernet (PoE) devices.

Current Period Highlights

        Revenues increased $52.8 million in fiscal 2016 compared to fiscal 2015, primarily due to increased revenues from our IoT and Infrastructure products offset by decreases in revenues from our Access and Broadcast products. Infrastructure revenues in fiscal 2016 included $5.0 million from the sale of patents. Gross margin increased $40.7 million during the same period due primarily to increased product sales. Operating expenses increased $6.7 million in fiscal 2016 compared to fiscal 2015 due primarily to increased personnel-related expenses and new product introduction costs, offset by adjustments to the fair value of acquisition-related contingent consideration and decreased acquisition-related costs and legal fees.


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        We ended fiscal 2016 with $295.1 million in cash, cash equivalents and short-term investments. Net cash provided by operating activities was $128.9 million during fiscal 2016. Accounts receivable increased to $74.4 million at December 31, 2016 compared to January 2, 2016, representing 37 days sales outstanding (DSO). Inventory increased to $59.6 million at December 31, 2016 compared to January 2, 2016, representing 73 days of inventory (DOI). In fiscal 2016, we repurchased 0.9 million shares of our common stock for $40.5 million. In fiscal 2016, we settled the remaining amount of the contingent consideration to be paid in connection with the Energy Micro acquisition. The settlement amount was $16.0 million.

        Through acquisitions and internal development efforts, we have continued to diversify our product portfolio and introduce new products and solutions with added functionality and further integration. In fiscal 2016, we acquired Micrium, LLC. Micrium is a supplier of real-time operating system (RTOS) software for the IoT. See Note 8,Acquisitions, to the Consolidated Financial Statements for additional information.

        In fiscal 2016, we introduced two new wireless occupancy sensor and smart outlet reference designs for the home automation market; new audio software products for the automotive radio market; a Bluetooth software solution that enables developers to efficiently create Apple® HomeKit™-enabled accessories; a mesh networking stack conforming to the Thread 1.1 specification; a small-footprint Bluetooth low energy system-in-package (SiP) module with a built-in chip antenna; a complete sensor-to-cloud Thunderboard kit that simplifies development of cloud-connected devices for the IoT; Wireless Gecko modules focused on mesh networking applications; a major update to our Simplicity Studio software development tools for IoT connected device applications; a CMOS-based family of isolated field effect transistor (FET) drivers; isolated gate drivers designed to protect power inverter and motor drive applications; high-speed, multi-channel programmable logic controller (PLC) isolators; a small, low-power USBXpress™ bridge device; multiband Wireless Gecko system-on-chip (SoC) devices enabling both 2.4 GHz and sub-GHz multiprotocol connectivity for the IoT market; a comprehensive reference design for cables and adapters based on the USB Type-C™ specification; jitter-attenuating clocks that simplify 100G/400G coherent optical line card and module design; a fully integrated, pre-certified Bluetooth module for low-energy applications; a family of isolated gate drivers for high-speed power supply designs; a plug-and-play Wi-Fi module solution for IoT applications; the scalable Blue Gecko wireless SoC family for the Bluetooth low-energy market; the Wireless Gecko portfolio of multiprotocol SoC devices for IoT applications; next-generation optical sensors that enable enhanced measurement of ultraviolet (UV) radiation and gesture recognition; and an optical heart rate sensing solution for wrist-based heart rate monitoring (HRM) applications. We plan to continue to introduce products that increase the content we provide for existing applications, thereby enabling us to serve markets we do not currently address and expand our total available market opportunity.

        During fiscal 2016 and 2015, we had no end customer that represented more than 10% of our revenues. During fiscal 2014, we had one end customer, Samsung, whose purchases across a variety of product areas represented 12% of our revenues. In addition to direct sales to customers, some of our end customers purchase products indirectly from us through distributors and contract manufacturers. An end customer purchasing through a contract manufacturer typically instructs such contract manufacturer to obtain our products and incorporate such products with other components for sale by such contract manufacturer to the end customer. Although we actually sell the products to, and are paid by, the distributors and contract manufacturers, we refer to such end customer as our customer. Three of our distributors who sell to our customers, Edom Technology, Avnet and Arrow Electronics, each represented 17%, 13% and 11% of our revenues during fiscal 2016. Edom and Avnet represented 20% and 12% of our revenues during fiscal 2015, and 20% and 12% of our revenues during fiscal 2014, respectively. There were no other distributors or contract manufacturers that accounted for more than 10% of our revenues in fiscal 2016, 2015 or 2014.


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        The percentage of our revenues derived from outside of the United States was 86% in fiscal 2016, 85% in fiscal 2015 and 86% in fiscal 2014. Substantially all of our revenues to date have been denominated in U.S. dollars. We believe that a majority of our revenues will continue to be derived from customers outside of the United States.

        The sales cycle for our ICs can be as long as 12 months or more. An additional three to six months or more are usually required before a customer ships a significant volume of devices that incorporate our ICs. Due to this lengthy sales cycle, we typically experience a significant delay between incurring research and development and selling, general and administrative expenses, and the corresponding sales. Consequently, if sales in any quarter do not occur when expected, expenses and inventory levels could be disproportionately high, and our operating results for that quarter and, potentially, future quarters would be adversely affected. Moreover, the amount of time between initial research and development and commercialization of a product, if ever, can be substantially longer than the sales cycle for the product. Accordingly, if we incur substantial research and development costs without developing a commercially successful product, our operating results, as well as our growth prospects, could be adversely affected.

        Because many of our ICs are designed for use in consumer products such as televisions, set-top boxes, radios and wearables, we expect that the demand for our products will be typically subject to some degree of seasonal demand. However, rapid changes in our markets and across our product areas make it difficult for us to accurately estimate the impact of seasonal factors on our business.

Results of Operations

        The following describes the line items set forth in our Consolidated Statements of Income:

        Revenues.    Revenues are generated predominately by sales of our products. We recognize revenue on sales when all of the following criteria are met: 1) there is persuasive evidence that an arrangement exists, 2) delivery of goods has occurred, 3) the sales price is fixed or determinable, and 4) collectibility is reasonably assured. Generally, we recognize revenue from product sales to direct customers and contract manufacturers upon shipment. Certain of our sales are made to distributors under agreements allowing certain rights of return and price protection on products unsold by distributors. Accordingly, we defer the revenue and cost of revenue on such sales until the distributors sell the product to the end customer. A small portion of our revenues is derived from the sale of patents. The above revenue recognition criteria for patent sales are generally met upon the execution of the patent sale agreement. Our products typically carry a one-year replacement warranty. Replacements have been insignificant to date.

        Our revenues are subject to variation from period to period due to the volume of shipments made within a period, the mix of products we sell and the prices we charge for our products. The vast majority of our revenues were negotiated at prices that reflect a discount from the list prices for our products. These discounts are made for a variety of reasons, including: 1) to establish a relationship with a new customer, 2) as an incentive for customers to purchase products in larger volumes, 3) to provide profit margin to our distributors who resell our products or 4) in response to competition. In addition, as a product matures, we expect that the average selling price for such product will decline due to the greater availability of competing products. Our ability to increase revenues in the future is dependent on increased demand for our established products and our ability to ship larger volumes of those products in response to such demand, as well as our ability to develop or acquire new products and subsequently achieve customer acceptance of newly introduced products.

        Cost of Revenues.    Cost of revenues includes the cost of purchasing finished silicon wafers processed by independent foundries; costs associated with assembly, test and shipping of those products; costs of personnel and equipment associated with manufacturing support, logistics and quality assurance; costs of software royalties, other intellectual property license costs and certain acquired


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intangible assets; and an allocated portion of our occupancy costs. Our gross margin as a percentage of revenue fluctuates depending on product mix, manufacturing yields, inventory valuation adjustments, average selling prices and other factors.

        Research and Development.    Research and development expense consists primarily of personnel-related expenses, including stock-based compensation, as well as new product masks, external consulting and services costs, equipment tooling, equipment depreciation, amortization of intangible assets, and an allocated portion of our occupancy costs. Research and development activities include the design of new products, refinement of existing products and design of test methodologies to ensure compliance with required specifications.

        Selling, General and Administrative.    Selling, general and administrative expense consists primarily of personnel-related expenses, including stock-based compensation, as well as an allocated portion of our occupancy costs, sales commissions to independent sales representatives, applications engineering support, professional fees, legal fees and promotional and marketing expenses.

        Interest Income.    Interest income reflects interest earned on our cash, cash equivalents and investment balances.

        Interest Expense.    Interest expense consists of interest on our short and long-term obligations, including our credit facilities.

        Other, Net.    Other, net consists primarily of foreign currency remeasurement adjustments as well as other non-operating income and expenses.

        Provision for Income Taxes.    Provision for income taxes includes both domestic and foreign income taxes at the applicable tax rates adjusted for non-deductible expenses, research and development tax credits and other permanent differences.

        The following table sets forth our Consolidated Statements of Income data as a percentage of revenues for the periods indicated:

 
 Fiscal Year 
 
 2016 2015 2014 

Revenues

  100.0% 100.0% 100.0%

Cost of revenues

  39.6  40.9  39.0 

Gross margin

  60.4  59.1  61.0 

Operating expenses:

          

Research and development

  28.6  29.2  27.9 

Selling, general and administrative

  22.3  24.9  24.8 

Operating expenses

  50.9  54.1  52.7 

Operating income

  9.5  5.0  8.3 

Other income (expense):

          

Interest income

  0.2  0.1  0.2 

Interest expense

  (0.4) (0.4) (0.6)

Other, net

  (0.1) 0.0  0.0 

Income before income taxes

  9.2  4.7  7.9 

Provision for income taxes

  0.4  0.1  1.8 

Net income

  8.8% 4.6% 6.1%

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Comparison of Fiscal 2016 to Fiscal 2015

Revenues

 
 Fiscal Year  
  
 
(in millions)
 2016 2015 Change % Change 

Internet of Things

 $314.6 $262.3 $52.3  19.9%

Broadcast

  157.7  161.8  (4.1) (2.5)%

Infrastructure

  147.7  122.0  25.7  21.1%

Access

  77.6  98.7  (21.1) (21.4)%

Revenues

 $697.6 $644.8 $52.8  8.2%

        The change in revenues in fiscal 2016 was due primarily to:

    Increased revenues of $52.3 million for our Internet of Things products, due primarily to increases in the market and the addition of revenues from acquisitions.

    Decreased revenues of $4.1 million for Broadcast products, due primarily to decreases in the market for our consumer products.

    Increased revenues of $25.7 million for our Infrastructure products, due primarily to increased demand for our products and the sale of patents for $5.0 million.

    Decreased revenues of $21.1 million for our Access products, due primarily to decreased demand for our products and decreases in the market for such products.

        Unit volumes of our products increased by 14.6% and average selling prices decreased by 6.2% compared to fiscal 2015. The average selling prices of our products may fluctuate significantly from period to period. In general, as our products become more mature, we expect to experience decreases in average selling prices. We anticipate that newly announced, higher priced, next generation products and product derivatives will offset some of these decreases.

Gross Margin

 
 Fiscal Year  
 
(in millions)
 2016 2015 Change 

Gross margin

 $421.5 $380.8 $40.7 

Percent of revenue

  60.4% 59.1% 1.3%

        The increased dollar amount of gross margin in fiscal 2016 was due to increases in gross margin of $27.9 million for our Internet of Things products and $21.7 million for our Infrastructure products, offset by decreases in gross margin of $7.1 million for our Access products and $1.8 million for our Broadcast products. Gross margin in fiscal 2016 included $5.0 million from the sale of patents, which had no associated cost of revenues. Gross margin in fiscal 2015 included $2.6 million in acquisition-related charges for the fair value write-up associated with inventory acquired from Bluegiga and Telegesis.

        We may experience declines in the average selling prices of certain of our products. This creates downward pressure on gross margin as a percentage of revenues and may be offset to the extent we are able to: 1) introduce higher margin new products and gain market share with our products; 2) reduce costs of existing products through improved design; 3) achieve lower production costs from our wafer suppliers and third-party assembly and test subcontractors; 4) achieve lower production costs per unit as a result of improved yields throughout the manufacturing process; or 5) reduce logistics costs.


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Research and Development

 
 Fiscal Year  
  
 
(in millions)
 2016 2015 Change % Change 

Research and development

 $199.7 $188.1 $11.6  6.2%

Percent of revenue

  28.6% 29.2%      

        The increase in research and development expense in fiscal 2016 was primarily due to increases of (a) $5.9 million for personnel-related expenses, including costs associated with increased headcount, and (b) $4.4 million for new product introduction costs. We expect that research and development expense will increase in absolute dollars in the first quarter of 2017.

Selling, General and Administrative

 
 Fiscal Year  
  
 
(in millions)
 2016 2015 Change % Change 

Selling, general and administrative

 $155.5 $160.5 $(5.0) (3.1)%

Percent of revenue

  22.3% 24.9%      

        The decrease in selling, general and administrative expense in fiscal 2016 was primarily due to decreases of (a) $2.1��million for adjustments to the fair value of acquisition-related contingent consideration, (b) $1.3 million for personnel-related expenses, (c) $1.0 million for acquisition-related costs, and (d) $1.0 million for legal fees, primarily related to litigation. We expect that selling, general and administrative expense will remain relatively stable in absolute dollars in the first quarter of 2017.

Interest Income

        Interest income in fiscal 2016 was $1.3 million compared to $0.7 million in fiscal 2015.

Interest Expense

        Interest expense in fiscal 2016 was $2.6 million compared $2.8 million in fiscal 2015.

Other, Net

        Other, net in fiscal 2016 was $(0.5) million compared to $0.1 million in fiscal 2015.

Provision for Income Taxes

 
 Fiscal Year  
 
(in millions)
 2016 2015 Change 

Provision for income taxes

 $3.0 $0.7 $2.3 

Effective tax rate

  4.7% 2.2%   

        The effective tax rate for fiscal 2016 increased from fiscal 2015 primarily due to fiscal 2015 including a net benefit resulting from a change in the tax accounting treatment of stock-based compensation in a cost-sharing arrangement following a U.S. Tax Court case (Altera). The increase in the effective tax rate was partially offset by a reduction in the prior period valuation allowance. See Note 16,Income Taxes, to the Consolidated Financial Statements for additional information.

        The effective tax rates for each of the periods presented differ from the federal statutory rate of 35% due to the amount of income earned in foreign jurisdictions where the tax rate may be lower than the federal statutory rate and other permanent items including nondeductible compensation expenses and research and development tax credits.


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Comparison of Fiscal 2015 to Fiscal 2014

Revenues

 
 Fiscal Year  
  
 
 
  
 %
Change
 
(in millions)
 2015 2014 Change 

Internet of Things

 $262.3 $209.0 $53.3  25.5%

Broadcast

  161.8  204.3  (42.5) (20.8)%

Infrastructure

  122.0  108.1  13.9  12.8%

Access

  98.7  99.3  (0.6) (0.6)%

Revenues

 $644.8 $620.7 $24.1  3.9%

        The change in revenues in fiscal 2015 was due primarily to:

    Increased revenues of $53.3 million for our Internet of Things products, due primarily to market share gains for our products, increases in the market and the addition of revenues from acquisitions.

    Decreased revenues of $42.5 million for Broadcast products, due primarily to decreases in our market share and the market for our consumer products and the sale of patents for $7.1 million in the fiscal 2014. The decrease in Broadcast revenues was offset by increased revenues for our automotive products due to increases in market share.

    Increased revenues of $13.9 million for our Infrastructure products, due primarily to market share gains.

    Decreased revenues of $0.6 million for our Access products.

        Unit volumes of our products increased by 3.4% and average selling prices increased by 1.7% compared to fiscal 2014.

Gross Margin

 
 Fiscal Year  
 
(in millions)
 2015 2014 Change 

Gross margin

 $380.8 $378.6 $2.2 

Percent of revenue

  59.1% 61.0% (1.9)%

        The increased dollar amount of gross margin in fiscal 2015 was due to increases in gross margin of $18.8 million for our Internet of Things products, $8.1 million for our Infrastructure products and $0.6 million for our Access products, offset by a decrease in gross margin of $25.3 million for our Broadcast products. Gross margin in fiscal 2015 included $2.6 million in acquisition-related charges for the fair value write-up associated with inventory acquired from Bluegiga and Telegesis. Gross margin in fiscal 2014 included $7.1 million from the sale of patents, which had no associated cost of revenues.

Research and Development

 
 Fiscal Year  
  
 
 
  
 %
Change
 
(in millions)
 2015 2014 Change 

Research and development

 $188.1 $173.0 $15.1  8.7%

Percent of revenue

  29.2% 27.9%      

        The increase in research and development expense in fiscal 2015 was primarily due to increases of (a) $9.7 million for personnel-related expenses, including costs associated with increased headcount, and (b) $6.7 million for the amortization of intangible assets.


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Selling, General and Administrative

 
 Fiscal Year  
  
 
 
  
 %
Change
 
(in millions)
 2015 2014 Change 

Selling, general and administrative

 $160.5 $154.1 $6.4  4.1%

Percent of revenue

  24.9% 24.8%      

        The increase in selling, general and administrative expense in fiscal 2015 was primarily due to increases of (a) $10.8 million for personnel-related expenses, including costs associated with increased headcount, (b) $1.9 million for the amortization of intangible assets, (c) $1.6 million for acquisition-related costs, and (d) $1.0 million for product marketing costs. The increase in selling, general and administrative expense was offset in part by decreases of (a) $6.3 million for legal fees, primarily related to litigation, and (b) $5.2 million for adjustments to the fair value of acquisition-related contingent consideration.

Interest Income

        Interest income in fiscal 2015 was $0.7 million compared to $1.0 million in fiscal 2014.

Interest Expense

        Interest expense in fiscal 2015 was $2.8 million compared $3.2 million in fiscal 2014.

Other, Net

        Other, net in fiscal 2015 was $0.1 million compared to $(0.2) million in fiscal 2014.

Provision for Income Taxes

 
 Fiscal Year  
 
(in millions)
 2015 2014 Change 

Provision for income taxes

 $0.7 $11.0 $(10.3)

Effective tax rate

  2.2% 22.5%   

        The effective tax rate for fiscal 2015 decreased from fiscal 2014, primarily due to the completion of payments related to a prior year intercompany licensing arrangement resulting in an increase to the foreign tax rate benefit as well as the recognition of a net benefit resulting from a change in the tax accounting treatment of stock-based compensation in a cost-sharing arrangement following a U.S. Tax Court case (Altera). See Note 16,Income Taxes, to the Consolidated Financial Statements for additional information.

        The decrease in the effective tax rate from the completion of payments related to a prior year intercompany licensing arrangement and the recognition of a net benefit from the Altera case, was partially offset by an increase in the prior year valuation allowance related to lower expectations of profitability in jurisdictions where tax attributes exist.

        The effective tax rates for each of the periods presented differ from the federal statutory rate of 35% due to the amount of income earned in foreign jurisdictions where the tax rate may be lower than the federal statutory rate and other permanent items including nondeductible compensation expenses and research and development tax credits.

Business Outlook

        We expect revenues in the first quarter of fiscal 2017 to be in the range of $174 to $179 million. Furthermore, we expect our diluted earnings per share to be in the range of $0.21 to $0.27.


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Liquidity and Capital Resources

        Our principal sources of liquidity as of December 31, 2016 consisted of $295.1 million in cash, cash equivalents and short-term investments, of which approximately $193.8 million was held by our U.S. entities. The remaining balance was held by our foreign subsidiaries. Our cash equivalents and short-term investments consisted of municipal bonds, money market funds, corporate bonds, variable-rate demand notes, U.S. government bonds, asset-back securities, certificates of deposit, commercial paper and international government bonds. Our long-term investments consisted of auction-rate securities. As of December 31, 2016, we held $6.0 million par value auction-rate securities, all of which have experienced failed auctions because sell orders exceeded buy orders. See Note 4,Fair Value of Financial Instruments, to the Consolidated Financial Statements for additional information.

Operating Activities

        Net cash provided by operating activities was $128.9 million during fiscal 2016, compared to net cash provided of $105.4 million during fiscal 2015. Operating cash flows during fiscal 2016 reflect our net income of $61.5 million, adjustments of $74.8 million for depreciation, amortization, stock-based compensation and deferred income taxes, and a net cash outflow of $7.4 million due to changes in our operating assets and liabilities.

        Net cash provided by operating activities was $105.4 million during fiscal 2015, compared to net cash provided of $137.4 million during fiscal 2014. Operating cash flows during fiscal 2015 reflect our net income of $29.6 million, adjustments of $80.2 million for depreciation, amortization, stock-based compensation and deferred income taxes, and a net cash outflow of $4.4 million due to changes in our operating assets and liabilities.

        Accounts receivable increased to $74.4 million at December 31, 2016 from $73.6 million at January 2, 2016. The increase in accounts receivable resulted primarily from normal variations in the timing of collections and billings. Our average DSO was 37 days at December 31, 2016 and 41 days at January 2, 2016.

        Inventory increased to $59.6 million at December 31, 2016 from $53.9 million at January 2, 2016. Our inventory level is primarily impacted by our need to make purchase commitments to support forecasted demand and variations between forecasted and actual demand. Our DOI was 73 days at December 31, 2016 and January 2, 2016.

Investing Activities

        Net cash used in investing activities was $49.6 million during fiscal 2016, compared to net cash used of $49.3 million during fiscal 2015. The increase in cash outflows was principally due to an increase of $87.8 million in net purchases of marketable securities and an increase of $2.4 million for the purchase of other assets, offset by a decrease of $89.6 million in net payments for the acquisition of businesses. See Note 8,Acquisitions, to the Consolidated Financial Statements for additional information.

        Net cash used in investing activities was $49.3 million during fiscal 2015, compared to net cash used of $26.3 million during fiscal 2014. The increase in cash outflows was principally due to $96.1 million in net payments for the acquisition of businesses, including $76.1 million for the purchase of Bluegiga and Telegesis and $20.0 million for consideration previously withheld in connection with our purchase of Energy Micro, offset by an increase of $74.0 million from net proceeds from the sales and maturities of marketable securities.

        We anticipate capital expenditures of approximately $18 to $22 million for fiscal 2017. Additionally, as part of our growth strategy, we expect to evaluate opportunities to invest in or acquire other


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businesses, intellectual property or technologies that would complement or expand our current offerings, expand the breadth of our markets or enhance our technical capabilities.

Financing Activities

        Net cash used in financing activities was $52.3 million during fiscal 2016, compared to net cash used of $83.8 million during fiscal 2015. The decrease in cash outflows was principally due to a decrease of $89.7 million in payments on debt and a decrease of $30.9 million for repurchases of our common stock, offset by $81.2 million in net proceeds from the issuance of long-term debt during fiscal 2015 and an increase of $5.0 million for payments of acquisition-related contingent consideration. In July 2015, we amended our Credit Agreement. In August 2015, the Board of Directors authorized a program to repurchase up to $100 million of our common stock through December 2016. In January 2017, the Board of Directors authorized a program to repurchase up to $100 million of our common stock through December 2017.

        Net cash used in financing activities was $83.8 million during fiscal 2015, compared to net cash used of $65.2 million during fiscal 2014. The increase in cash outflows was principally due to an increase of $87.2 million in payments on debt and a decrease of $10.2 million from proceeds from the issuance of common stock, net of cash paid for withheld taxes, offset by net proceeds of $81.2 million from the issuance of long-term debt.

Debt

        On July 31, 2012, we entered into a $230 million five-year Credit Agreement (the "Credit Agreement"), which consisted of a $100 million Term Loan Facility and a $130 million Revolving Credit Facility (collectively, the "Credit Facilities"). On July 24, 2015, we amended the Credit Agreement (the "Amended Credit Agreement") in order to, among other things, increase the borrowing capacity under the Revolving Credit Facility to $300 million, eliminate the Term Loan Facility and extend the maturity date to five years from the closing date. On July 24, 2015, we borrowed $82.5 million under the Amended Credit Agreement and paid off the remaining balance of our Term Loan Facility.

        The Amended Credit Agreement includes a $25 million letter of credit sublimit and a $10 million swingline loan sublimit. We also have an option to increase the size of the borrowing capacity by up to an aggregate of $200 million in additional commitments, subject to certain conditions. See Note 10,Debt, to the Consolidated Financial Statements for additional information.

        Our future capital requirements will depend on many factors, including the rate of sales growth, market acceptance of our products, the timing and extent of research and development projects, potential acquisitions of companies or technologies and the expansion of our sales and marketing activities. We believe our existing cash, cash equivalents, investments and credit under our Credit Facilities are sufficient to meet our capital requirements through at least the next 12 months, although we could be required, or could elect, to seek additional funding prior to that time. We may enter into acquisitions or strategic arrangements in the future which also could require us to seek additional equity or debt financing.


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Contractual Obligations

        The following table summarizes our contractual obligations as of December 31, 2016 (in thousands):

 
 Payments due by period 
 
 Total 2017 2018 2019 2020 2021 Thereafter 

Long-term debt obligations (1)

 $72,500 $ $ $ $72,500 $ $ 

Interest on long-term debt obligations (2)

 $7,873 $2,201 $2,219 $2,207 $1,246 $ $ 

Operating lease obligations (3)

 $21,047 $5,139 $3,852 $2,700 $2,432 $2,286 $4,638 

Purchase obligations (4)

 $44,613 $44,613 $ $ $ $ $ 

Other long-term obligations (5)

 $15,108 $ $4,976 $5,468 $4,664 $ $ 

(1)
Long-term debt obligations represent the principal portion of our Credit Facilities.

(2)
Interest on our long-term debt obligations is based on the Eurodollar Base Rate plus an applicable margin. We have entered into an interest rate swap agreement as a hedge against the Eurodollar portion of such variable interest payments and effectively converted the Eurodollar portion of the interest on the Credit Facilities to a fixed interest rate through July 2020. As of December 31, 2016, the combined interest rate on the Credit Facilities and the interest rate swap was 2.375%. The impact of the interest rate swap was factored into the calculation of the future interest payments on our long-term debt obligations through July 2020.

(3)
Operating lease obligations include amounts for leased facilities.

(4)
Purchase obligations include contractual arrangements in the form of purchase orders with suppliers where there is a fixed non-cancelable payment schedule or minimum payments due with a reduced delivery schedule.

(5)
Other long-term obligations primarily represent software license obligations.

We are unable to make a reasonably reliable estimate as to when or if cash settlement with taxing authorities will occur for our unrecognized tax benefits. Therefore, our liability of $3.1 million for unrecognized tax benefits is not included in the table above. See Note 16,Income Taxes, to the Consolidated Financial Statements for additional information.

Off-Balance Sheet Arrangements

        As of December 31, 2016, we had no significant off-balance sheet arrangements.

Critical Accounting Policies and Estimates

        The preparation of financial statements and accompanying notes in conformity with U.S. generally accepted accounting principles requires that we make estimates and assumptions that affect the amounts reported. Changes in facts and circumstances could have a significant impact on the resulting estimated amounts included in the financial statements. We believe the following critical accounting policies affect our more complex judgments and estimates. We also have other policies that we consider to be key accounting policies, such as our policies for revenue recognition, including the deferral of revenues and cost of revenues on sales to distributors; however, these policies do not meet the definition of critical accounting estimates because they do not generally require us to make estimates or judgments that are difficult or subjective.

        Inventory valuation—We assess the recoverability of inventories through the application of a set of methods, assumptions and estimates. In determining net realizable value, we write down inventory that


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may be slow moving or have some form of obsolescence, including inventory that has aged more than 12 months. We also adjust the valuation of inventory when its manufacturing cost exceeds the estimated market value less selling costs. We assess the potential for any unusual customer returns based on known quality or business issues and write-off inventory losses for scrap or non-saleable material. Inventory not otherwise identified to be written down is compared to an assessment of our 12-month forecasted demand. The result of this methodology is compared against the product life cycle and competitive situations in the marketplace to determine the appropriateness of the resulting inventory levels. Demand for our products may fluctuate significantly over time, and actual demand and market conditions may be more or less favorable than those that we project. In the event that actual demand is lower or market conditions are worse than originally projected, additional inventory write-downs may be required.

        Stock-based compensation—We recognize the fair-value of stock-based compensation transactions in the Consolidated Statements of Income. The fair value of our full-value stock awards (with the exception of market-based performance awards) equals the fair market value of our stock on the date of grant. The fair value of our market-based performance awards is estimated at the date of grant using a Monte-Carlo simulation. The fair value of our stock option and employee stock purchase plan grants is estimated at the date of grant using the Black-Scholes option pricing model. In addition, we are required to estimate the expected forfeiture rate of our stock grants and only recognize the expense for those shares expected to vest. If our actual experience differs significantly from the assumptions used to compute our stock-based compensation cost, or if different assumptions had been used, we may have recorded too much or too little stock-based compensation cost. See Note 12,Stock-Based Compensation, to the Consolidated Financial Statements for additional information.

        Investments in auction-rate securities—We determine the fair value of our investments in auction-rate securities using a discounted cash flow model. The assumptions used in preparing the discounted cash flow model include estimates for interest rates, amount of cash flows, expected holding periods of the securities and a discount to reflect our inability to liquidate the securities. For available-for-sale auction-rate securities, if the calculated value is below the carrying amount of the securities, we then determine if the decline in value is other-than-temporary. We consider various factors in determining whether an impairment is other-than-temporary, including the severity and duration of the impairment, changes in underlying credit ratings, forecasted recovery, our intent to sell or the likelihood that we would be required to sell the investment before its anticipated recovery in market value and the probability that the scheduled cash payments will continue to be made. When we conclude that an other-than-temporary impairment has occurred, we assess whether we intend to sell the security or if it is more likely than not that we will be required to sell the security before recovery. If either of these two conditions is met, we recognize a charge in earnings equal to the entire difference between the security's amortized cost basis and its fair value. If we do not intend to sell a security and it is not more likely than not that we will be required to sell the security before recovery, the unrealized loss is separated into an amount representing the credit loss, which is recognized in earnings, and the amount related to all other factors, which is recorded in accumulated other comprehensive income (loss).

        Acquired intangible assets—When we acquire a business, a portion of the purchase price is typically allocated to identifiable intangible assets, such as acquired technology and customer relationships. Fair value of these assets is determined primarily using the income approach, which requires us to project future cash flows and apply an appropriate discount rate. We amortize intangible assets with finite lives over their expected useful lives. Our estimates are based upon assumptions believed to be reasonable but which are inherently uncertain and unpredictable. Assumptions may be incomplete or inaccurate, and unanticipated events and circumstances may occur. Incorrect estimates could result in future impairment charges, and those charges could be material to our results of operations.


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        Impairment of goodwill and other long-lived assets—We review long-lived assets which are held and used, including fixed assets and purchased intangible assets, for impairment whenever changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Such evaluations compare the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset over its expected useful life and are significantly impacted by estimates of future prices and volumes for our products, capital needs, economic trends and other factors which are inherently difficult to forecast. If the asset is considered to be impaired, we record an impairment charge equal to the amount by which the carrying value of the asset exceeds its fair value determined by either a quoted market price, if any, or a value determined by utilizing a discounted cash flow technique.

        We test our goodwill for impairment annually as of the first day of our fourth fiscal quarter and in interim periods if certain events occur indicating that the carrying value of goodwill may be impaired. The goodwill impairment test is a two-step process. The first step of the impairment analysis compares our fair value to our net book value. In determining fair value, the accounting guidance allows for the use of several valuation methodologies, although it states quoted market prices are the best evidence of fair value. If the fair value is less than the net book value, the second step of the analysis compares the implied fair value of our goodwill to its carrying amount. If the carrying amount of goodwill exceeds its implied fair value, we recognize an impairment loss equal to that excess amount.

        Income taxes—We are required to calculate income taxes in each of the jurisdictions in which we operate. This process involves calculating the actual current tax liability together with assessing temporary differences in recognition of income (loss) for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included in our Consolidated Balance Sheet. We record a valuation allowance when it is more likely than not that some portion or all of the deferred tax assets will not be realized. In assessing the need for a valuation allowance, we are required to estimate the amount of expected future taxable income. Judgment is inherent in this process and differences between the estimated and actual taxable income could result in a material impact on our Consolidated Financial Statements.

        We recognize liabilities for uncertain tax positions based on a two-step process. The first step requires us to determine whether the weight of available evidence indicates that the tax position has met the threshold for recognition. Therefore, we must evaluate whether it is more likely than not that the position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step requires us to measure the tax benefit of the tax position taken, or expected to be taken, in an income tax return as the largest amount that is more than 50% likely of being realized upon ultimate settlement. This measurement step is inherently complex and requires subjective estimations of such amounts to determine the probability of various possible outcomes. We re-evaluate the uncertain tax positions each quarter based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, expirations of statutes of limitation, effectively settled issues under audit, and new audit activity. Such a change in recognition or measurement would result in the recognition of a tax benefit or an additional charge to the tax provision in the period.

        Although we believe the measurement of our liabilities for uncertain tax positions is reasonable, no assurance can be given that the final outcome of these matters will not be different than what is reflected in the historical income tax provisions and accruals. If additional taxes are assessed as a result of an audit or litigation, it could have a material effect on our income tax provision and net income in the period or periods for which that determination is made. We operate within multiple taxing jurisdictions and are subject to audit in these jurisdictions. These audits can involve complex issues which may require an extended period of time to resolve and could result in additional assessments of income tax. We believe adequate provisions for income taxes have been made for all periods.


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Recent Accounting Pronouncements

        In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. This ASU clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. This ASU is effective for annual periods beginning after December 15, 2017, including interim periods within those periods. We are currently evaluating the effect that the adoption of this ASU will have on our financial statements.

        In August 2016, the FASB issued ASU No. 2016-16,Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. This ASU requires the recognition of the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This ASU is effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, with early adoption permitted. The amendments in this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We have elected to early adopt this ASU on January 1, 2017. We currently expect to record a cumulative-effect adjustment to decrease retained earnings by between $0.0 and $2.5 million with a corresponding adjustment to non-current assets and deferred taxes on the Consolidated Balance Sheet.

        In August 2016, the FASB issued ASU No. 2016-15,Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This ASU provides guidance on statement of cash flows presentation for eight specific cash flow issues where diversity in practice exists. This ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. We are currently evaluating the effect that the adoption of this ASU will have on our financial statements.

        In June 2016, the FASB issued ASU No. 2016-13,Financial Instruments—Credit Losses (Topic 326: Measurement of Credit Losses on Financial Instruments. This ASU requires instruments measured at amortized cost to be presented at the net amount expected to be collected. Entities are also required to record allowances for available-for-sale debt securities rather than reduce the carrying amount. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. We are currently evaluating the effect that the adoption of this ASU will have on our financial statements.

        In March 2016, the FASB issued ASU No. 2016-09,Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This ASU simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. This ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We expect the primary impact of this ASU to be the income tax effects of awards recognized in the income statement when the awards are vested or settled.

        In February 2016, the FASB issued ASU No. 2016-02,Leases (Topic 842). The core principle of Topic 842 is that a lessee should recognize the assets and liabilities that arise from leases. For operating leases, a lessee is required to recognize a right-of-use asset and a lease liability, initially measured at the present value of the lease payments, in the statement of financial position. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We are currently evaluating the effect that the adoption of this ASU will have on our financial statements.

        In January 2016, the FASB issued ASU No. 2016-01,Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This ASU addresses certain aspects of recognition, measurement, presentation and disclosure of financial


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instruments. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We are currently evaluating the effect that the adoption of this ASU will have on our financial statements.

        In July 2015, the FASB issued ASU No. 2015-11,Inventory (Topic 330): Simplifying the Measurement of Inventory. This ASU requires inventory to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. This ASU is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. We do not expect that the adoption of this ASU will have a material impact on our financial statements.

        In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Accounting Standards Codification (ASC) 605,Revenue Recognition. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides a five-step process to achieve that core principle. In August 2015, the FASB issued ASU No. 2015-14,Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which deferred the effective date of ASU 2014-09 to annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. In 2016, the FASB issued the following amendments to ASC 606: ASU No. 2016-08,Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which clarifies the implementation guidance on principal versus agent considerations; ASU No. 2016-10,Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, which clarifies guidance on identification of performance obligations and licensing implementation; ASU No. 2016-12,Compensation—Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, which provides clarifying guidance on assessing collectibility, presentation of sales taxes, noncash consideration, contract modifications and completed contracts; and ASU No. 2016-20,Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers, which clarifies narrow aspects of ASC 606 or corrects unintended application of the guidance. The standard may be applied retrospectively to each prior period presented (full retrospective method) or retrospectively with the cumulative effect recognized as of the date of initial application (modified retrospective method). Under the new standard, we expect the timing of revenue recognition from sales to distributors to be accelerated. We will recognize revenue at the time of sale to the distributor, net of the impact of estimated price adjustments and rights of return. We currently anticipate adopting this standard using the modified retrospective method. We are continuing to evaluate the effect that the adoption will have on our financial statements.

Item 7A.    Quantitative and Qualitative Disclosures about Market Risk

Interest Income

        Our investment portfolio includes cash, cash equivalents, short-term investments and long-term investments. Our main investment objectives are the preservation of investment capital and the maximization of after-tax returns on our investment portfolio. Our interest income is sensitive to changes in the general level of U.S. interest rates. Our investment portfolio holdings as of December 31, 2016 and January 2, 2016 yielded less than 100 basis points. A decline in yield to zero basis points on our investment portfolio holdings as of December 31, 2016 and January 2, 2016 would decrease our future annual interest income by approximately $1.9 million and $0.9 million, respectively. We believe that our investment policy, which defines the duration, concentration, and minimum credit quality of the allowable investments, meets our investment objectives.


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Interest Expense

        We are exposed to interest rate fluctuations in the normal course of our business, including through our Credit Facilities. The interest payments on the Credit Facilities consist of a variable-rate of interest and an applicable margin. We have entered into an interest rate swap agreement with an original notional value of $72.5 million that, effectively, converted the variable-rate interest payments to fixed-rate interest payments through July 2020.

Foreign currency exchange rate risk

        We are exposed to foreign currency exchange rate risk primarily through assets and liabilities of our subsidiaries denominated in currencies other than the U.S. dollar. Our foreign subsidiaries are considered to be extensions of the U.S. parent. The functional currency of the foreign subsidiaries is the U.S. dollar. Accordingly, gains and losses resulting from remeasuring transactions denominated in currencies other than U.S. dollars are recorded in other, net in the Consolidated Statements of Income. We use foreign currency forward contracts to manage exposure to foreign exchange risk. Gains and losses on foreign currency forward contracts are recognized in earnings in the same period as the remeasurement loss and gain of the related foreign currency denominated asset or liability.

Investments in Auction-rate Securities

        As of December 31, 2016, we held $6.0 million par value auction-rate securities, all of which have experienced failed auctions because sell orders exceeded buy orders. We are unable to predict if these funds will become available before their maturity dates. Additionally, if we determine that an other-than-temporary decline in the fair value of any of our available-for-sale auction-rate securities has occurred, we may be required to adjust the carrying value of the investments through an impairment charge.

Item 8.    Financial Statements and Supplementary Data

        The Financial Statements and supplementary data required by this item are included in Part IV, Item 15 of this Form 10-K10-K/A and are presented beginning on page F-1.

Item 9.    Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

        None.

Item 9A.    Controls and Procedures

        We have performed an evaluation under the supervision and with the participation of our management, including our Chief Executive Officer (CEO) and Chief Financial Officer (CFO), of the effectiveness of our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the Exchange Act). BasedIn our Annual Report on Form 10-K for the year ended December 29, 2018 that evaluation,was filed on January 30, 2019, our management, including our CEO and CFO, concluded that our disclosure controls and procedures were effective as of December 31, 201629, 2018 to provide reasonable assurance that information required to be disclosed by us in the reports filed or submitted by us under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms. SuchSubsequent to that evaluation, our CEO and CFO concluded that our disclosure controls and procedures include controls and procedures designed to ensure that information required to be disclosed is accumulated and communicated to our management, including our CEO and CFO, to allow timely decisions regarding required disclosures. There was no changewere not effective as of December 29, 2018 because of the material weakness in our internal controls during the fiscal quarter ended December 31, 2016 that materially affected, or is reasonably likely to materially affect, our internal controlscontrol over financial reporting.


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Management's Report on Internal Control over Financial Reporting

        Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Our internal control system was designed to provide reasonable assurance to our management and Board of Directors regarding the preparation and fair presentation of published financial statements.

        Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2016.29, 2018. In making this assessment, itmanagement used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) inInternal Control—Integrated Framework (2013 framework). BasedIn Management's Report on Internal Control Over Financial Reporting included in our assessment weoriginal Annual Report on Form 10-K for the year ended December 29, 2018 that was filed on January 30, 2019, our management concluded that as of December 31, 2016, ourwe maintained effective internal control over financial reporting as of December 29, 2018. Following the Public Company Accounting Oversight Board's inspection of Ernst & Young LLP's audit of our December 29, 2018 financial statements and internal controls over financial reporting, management conducted a reassessment and subsequently concluded that the material weakness described below existed as of December 29, 2018 and concluded that we did not maintain effective internal control over financial reporting as of December 29, 2018.

        We identified the following material weakness that existed as of December 29, 2018:

We did not maintain sufficient design and operating effectiveness of controls over the accounting for business combinations, primarily the maintenance of sufficient contemporaneous documentation of management review controls over certain assumptions used in the valuation of acquired intangible assets and related recording of goodwill.

        A material weakness is effective baseda deficiency, or a combination of deficiencies in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the Company's annual or interim consolidated financial statements will not be prevented or detected on those criteria.a timely basis.

        Notwithstanding the material weakness discussed above, our management, including our CEO and CFO, has concluded that the consolidated financial statements included in this report fairly present, in


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all material respects, our financial condition, results of operations and cash flows for the periods presented in conformity with accounting principles generally accepted in the United States.

        Our independent registered public accounting firm, Ernst & Young LLP, has issued ana revised attestation report on our internal control over financial reporting. This report appears on page F-1.

Item 9B.    Other Information
Remediation Plan

        None.


TableWe have immediately commenced developing a plan to enhance the design and operating effectiveness of Contents


Part III

        Certain information required by Part III is omitted from this report becauseour internal controls over financial reporting, including maintaining sufficient contemporaneous documentation of management review controls over assumptions used in the valuation of acquired intangible assets and related recording of goodwill, which we intendbelieve will address the material weakness described above. Our remediation plan will include the implementation of procedures that will require enhanced documentation on the use of assumptions in business combinations and additional training. We expect our remediation will be complete prior to file a definitive Proxy Statement pursuant to Regulation 14A (the "Proxy Statement") no later than 120 days after the end of the fourth quarter of fiscal year covered by this report, and certain information to be included therein is incorporated herein by reference.2019.

Item 10.    Directors, Executive Officers and Corporate Governance
Changes in Internal Control over Financial Reporting

        The information required by this ItemThere was no change in our internal controls over financial reporting during the fiscal quarter ended December 29, 2018 that materially affected, or is incorporated by referencereasonably likely to the Proxy Statement under the sections captioned "Proposal One: Election of Directors," "Executive Compensation," "Section 16(a) Beneficial Ownership Reporting Compliance" and "Code of Ethics."

Item 11.    Executive Compensation

        The information under the caption "Executive Compensation" and "Proposal One: Election of Directors" appearing in the Proxy Statement, is incorporated herein by reference.

Item 12.    Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

        The information under the caption "Ownership of Securities" and "Equity Compensation Plan Information" appearing in the Proxy Statement is incorporated herein by reference.

Item 13.    Certain Relationships and Related Transactions, and Director Independence

        The information under the caption "Certain Relationships and Related Transactions, and Director Independence" appearing in the Proxy Statement is incorporated herein by reference.

Item 14.    Principal Accounting Fees and Services

        The information under the caption "Proposal Two: Ratification of Appointment of Independent Registered Public Accounting Firm" appearing in the Proxy Statement is incorporated herein by reference.materially affect, our internal controls over financial reporting.


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Part IV

Item 15.    Exhibits and Financial Statement Schedules

(a)
1.    Financial Statements


Index

 
 Page

Report of independent registered public accounting firm

 F-1

Report of independent registered public accounting firm

 
F-2F-3

Consolidated Balance Sheets at December 31, 201629, 2018 and January 2, 2016December 30, 2017

 
F-3F-4

Consolidated Statements of Income for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 January 2, 2016 and January 3, 2015

 
F-4F-5

Consolidated Statements of Comprehensive Income for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 January 2, 2016 and January 3, 2015

 
F-5F-6

Consolidated Statements of Changes in Stockholders' Equity for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 January 2, 2016 and January 3, 2015

 
F-6F-7

Consolidated Statements of Cash Flows for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 January 2, 2016 and January 3, 2015

 
F-7F-8

Notes to Consolidated Financial Statements

 
F-8F-9
    2.
    Schedules

            Schedule II—Valuation and Qualifying Accounts

            All other schedules have been omitted since the information required by the schedule is not applicable, or is not present in amounts sufficient to require submission of the schedule, or because the information required is included in the Consolidated Financial Statements and notes thereto.

    3.
    Exhibits

            The exhibits listed on the accompanying index to exhibits immediately following the Consolidated Financial Statements are filed as part of, or hereby incorporated by reference into, this Form 10-K.10-K/A.


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(b)
Exhibits
Exhibit
Number
         
 2.1*SaleAgreement and Purchase AgreementPlan of Merger, dated January 30, 2015,December 7, 2017, by and betweenamong Silicon Laboratories International Pte. Ltd.Inc., Seguin Merger Subsidiary, Inc. and the holders of shares, options and capital loans in Bluegiga Technologies OySigma Designs, Inc. (filed as Exhibit 2.1 to the Form 8-K filed on February 4, 2015)December 8, 2017).
2.2*Agreement dated November 20, 2015, by and between the shareholders of Telegesis (UK) Limited and Silicon Laboratories UK Limited (filed as Exhibit 2.1 to the Form 8-K filed on November 23, 2015).
     
 3.1*Form of Fourth Amended and Restated Certificate of Incorporation of Silicon Laboratories Inc. (filed as Exhibit 3.1 to the Registrant's Registration Statement on Form S-1 (Securities and Exchange Commission File No. 333-94853) (the "IPO Registration Statement")).
     
 3.2*Fourth Amended and Restated Bylaws of Silicon Laboratories Inc. (filed as Exhibit 3.2 to the Registrant's Current Report on Form 8-K filed on January 27, 2017).
     
 4.1*Specimen certificate for shares of common stock (filed as Exhibit 4.1 to the IPO Registration Statement).
4.2*Indenture between Silicon Laboratories Inc. and Wilmington Trust, National Association, as trustee, dated March 6, 2017 (filed as Exhibit 4.1 to the Form 8-K filed on March 6, 2017).
4.3*Form of 1.375% Convertible Senior Note due 2022 (filed as Exhibit 4.2 to the Form 8-K filed on March 6, 2017).
     
 10.1*+Form of Indemnification Agreement between Silicon Laboratories Inc. and each of its directors and executive officers (filed as Exhibit 10.1 to the IPO Registration Statement).
     
 10.2*Credit Agreement, dated July 31, 2012, by and among Silicon Laboratories Inc., the subsidiaries of the borrower identified therein, Bank of America, N.A., Wells Fargo Bank, National Association, and Regions Bank (filed as Exhibit 10.1 to the Form 8-K filed August 1, 2012).
     
 10.3*First Amendment to Credit Agreement, dated July 24, 2015, by and among Silicon Laboratories Inc., the subsidiaries of the borrower identified therein, Wells Fargo Bank, National Association, Citibank, N.A., Regions Bank, Bank of America, N.A. and the lenders party thereto (filed as Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on July 29, 2015).
     
 10.4*Second Amendment to Credit Agreement, dated February 27, 2017, by and among Silicon Laboratories Inc., the subsidiaries of the borrower identified therein, Wells Fargo Bank, National Association and the lenders party thereto (filed as Exhibit 10.1 to the Form 8-K filed on February 27, 2017).
10.5*Security and Pledge Agreement, dated July 31, 2012, by and among Silicon Laboratories Inc., with the other parties identified as "Obligors" (as defined therein) and such other parties that may become Obligors thereunder after the date thereof, and Bank of America, N.A (filed as Exhibit 10.2 to the Form 8-K filed August 1, 2012).
10.5*+Silicon Laboratories Inc. 2009 Stock Incentive Plan, as amended and restated on April 15, 2014 (filed as Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on April 16, 2014).
     
 10.6*+Silicon Laboratories Inc. 2009 Stock Incentive Plan, as amended and restated on April 20, 2017 (filed as Exhibit 10.1 to the Form 10-Q filed on July 26, 2017).
10.7*+Silicon Laboratories Inc. 2009 Employee Stock Purchase Plan, as amended and restated on April 15, 201420, 2017 (filed as Exhibit 10.2 to the Registrant's Current Report on Form 8-K10-Q filed on April 16, 2014)July 26, 2017).
     
 10.710.8*+Form of Restricted Stock Units Grant Notice and Global Restricted Stock Units Award Agreement under Registrant's 2009 Stock Incentive Plan, as amended and restated.restated (filed as Exhibit 10.7 to the Form 10-K filed on February 1, 2017).

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Exhibit
Number
 10.10
10.11*+Form of Performance Stock Units Grant Notice and Global PSU Award Agreement under Registrant's 2009 Stock Incentive Plan, as amended and restated.
10.11*+Silicon Laboratories Inc. 2017 Bonus Planrestated (filed as Exhibit 10.110.10 to the Registrant's Current Report on Form 8-K10-K filed on January 26,February 1, 2017).
     
 10.12*Purchase Agreement between Silicon Laboratories Inc. and Goldman, Sachs & Co. and Wells Fargo Securities,  LLC, as representatives of the several initial purchasers named therein, dated February 28, 2017 (filed as Exhibit 10.1 to the Form 8-K filed on March 6, 2017).
10.13*+CEO Change in Control Agreement dated October 23, 2018 between Silicon Laboratories Inc. and G. Tyson Tuttle (filed as Exhibit 10.1 to the Form 8-K filed on October 24, 2018).
10.14*+Silicon Laboratories Inc. Form of Change in Control Agreement (filed as Exhibit 10.110.2 to the Registrant's Current Report on Form 8-K filed on October 25, 2016)24, 2018).
10.15*+Silicon Laboratories Inc. 2019 Bonus Plan (filed as Exhibit 10.1 to the Form 8-K filed on January 28, 2019).
     
 21*Subsidiaries of the Registrant.Registrant (filed as Exhibit 21 to the Form 10-K filed on January 30, 2019).
     
 23.1 Consent of Independent Registered Public Accounting Firm.
     
 24*Power of Attorney (included(filed as Exhibit 24 to the Form 10-K filed on signature page to this Form 10-K)January 30, 2019).
     
 31.1 Certification of the Principal Executive Officer, as required by Section 302 of the Sarbanes-Oxley Act of 2002.
     
 31.2 Certification of the Principal Financial Officer, as required by Section 302 of the Sarbanes-Oxley Act of 2002.
     
 32.1 Certification as required by Section 906 of the Sarbanes-Oxley Act of 2002.
     
 101.INS*XBRL Instance Document (filed as Exhibit 101.INS to the Form 10-K filed on January 30, 2019).
     
 101.SCH*XBRL Taxonomy Extension Schema Document (filed as Exhibit 101.SCH to the Form 10-K filed on January 30, 2019).
     
 101.CAL*XBRL Taxonomy Extension Calculation Linkbase Document (filed as Exhibit 101.CAL to the Form 10-K filed on January 30, 2019).
     
 101.LAB*XBRL Taxonomy Extension Label Linkbase Document (filed as Exhibit 101.LAB to the Form 10-K filed on January 30, 2019).

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Exhibit Number
 101.PRE*XBRL Taxonomy Extension Presentation Linkbase Document (filed as Exhibit 101.PRE to the Form 10-K filed on January 30, 2019).
     
 101.DEF*XBRL Taxonomy Extension Definition Linkbase Document (filed as Exhibit 101.DEF to the Form 10-K filed on January 30, 2019).

*
Incorporated herein by reference to the indicated filing.

+
Management contract or compensatory plan or arrangement

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SCHEDULE II

SILICON LABORATORIES INC.
VALUATION AND QUALIFYING ACCOUNTS

Valuation Allowance for
Deferred Tax Assets
 Balance at
Beginning of
Period
 Additions
Charged to
Expenses
 Deductions Balance at
End of Period
  Balance at
Beginning of
Period
 Additions
Charged to
Expenses
 Additions
Charged to
Other
Accounts
 Deductions Balance at
End of Period
 

  
 (in thousands)
  
   
 (in thousands)
  
 

Year ended December 29, 2018

 $6,518 $435 $ $(1,978)$4,975 

Year ended December 30, 2017

 $12,361 $2,110 $1,732 $(9,685)$6,518 

Year ended December 31, 2016

 $10,264 $2,715 $(618)$12,361  $10,264 $2,715 $ $(618)$12,361 

Year ended January 2, 2016

 $3,455 $6,895 $(86)$10,264 

Year ended January 3, 2015

 $3,775 $ $(320)$3,455 

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SIGNATURES

        Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, in Austin, Texas, on February 1, 2017.May 3, 2019.

 SILICON LABORATORIES INC.

 

By:

 

/s/ G. TYSON TUTTLE


G. Tyson Tuttle
President and Chief Executive Officer


POWER OF ATTORNEY

        KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints G. Tyson Tuttle and John C. Hollister and each of them, acting individually, as his or her attorney-in-fact, each with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this annual report on Form 10-K and other documents in connection herewith and therewith, and to file the same, with all exhibits thereto, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection herewith and therewith and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

        Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated:


Name
 
Title
 
Date

 

 

 

 

 


/s/ NAVDEEP S. SOOCHSOOCH*

Navdeep S. Sooch
 Chairman of the Board February 1, 2017May 3, 2019

/s/ G. TYSON TUTTLE

G. Tyson Tuttle

 

President, Chief Executive Officer and Director (Principal
(Principal Executive Officer)

 

February 1, 2017May 3, 2019

/s/ JOHN C. HOLLISTER

John C. Hollister

 

Senior Vice President and Chief Financial Officer (Principal
(Principal Financial Officer and Principal Accounting Officer)

 

February 1, 2017May 3, 2019

/s/ WILLIAM G. BOCKBOCK*

William G. Bock

 

Director

 

February 1, 2017May 3, 2019

/s/ JACK R. LAZAR*

Jack R. Lazar


Director


May 3, 2019

/s/ GREGG LOWE*

Gregg Lowe


Director


May 3, 2019

/s/ NINA RICHARDSON*

Nina Richardson


Director


May 3, 2019

Table of Contents

Name
Title
Date





/s/ NEIL KIMSUMIT SADANA*

Neil KimSumit Sadana
 Director February 1, 2017May 3, 2019

/s/ JACK R. LAZAR

Jack R. Lazar


Director


February 1, 2017

/s/ NINA RICHARDSON

Nina Richardson


Director


February 1, 2017

/s/ SUMIT SADANA

Sumit Sadana


Director


February 1, 2017

/s/ WILLIAM P. WOODWOOD*

William P. Wood

 

Director

 

February 1, 2017May 3, 2019

/s/ CHRISTY WYATT*

Christy Wyatt


Director


May 3, 2019

*By


/s/ JOHN C. HOLLISTER

John C. Hollister
ATTORNEY-IN-FACT





Table of Contents

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of Silicon Laboratories Inc.

Opinion on Internal Control over Financial Reporting

        We have audited Silicon Laboratories Inc.'s internal control over financial reporting as of December 31, 2016,29, 2018, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, because of the effect of the material weakness described below on the achievement of the objectives of the control criteria, Silicon Laboratories Inc. (the Company) has not maintained effective internal control over financial reporting as of December 29, 2018, based on the COSO criteria.

        In our report dated January 30, 2019, we expressed an unqualified opinion that the Company maintained, in all material respects, effective internal control over financial reporting as of December 29, 2018, based on the COSO criteria. Management has subsequently identified a deficiency in controls related to the accounting for acquisitions, and has further concluded that such deficiency represented a material weakness as of December 29, 2018. As a result, management has revised its assessment, as presented in the accompanying Management's Report on Internal Control over Financial Reporting, to conclude that the Company's internal control over financial reporting was not effective as of December 29, 2018. Accordingly, our present opinion on the effectiveness of Silicon Laboratories Inc.'s internal control over financial reporting as of December 29, 2018, as expressed herein, is different from that expressed in our previous report.

        A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the company's annual or interim financial statements will not be prevented or detected on a timely basis. The following material weakness has been identified and included in management's assessment: Management has identified a material weakness in the design and operating effectiveness of controls over the accounting for business combinations, primarily the maintenance of sufficient contemporaneous documentation of management review controls over certain assumptions used in the valuation of acquired intangible assets and related recording of goodwill.

        We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of Silicon Laboratories Inc. as of December 29, 2018 and December 30, 2017, and the related consolidated statements of income, comprehensive income, stockholders' equity and cash flows for each of the three years in the period ended December 29, 2018, and the related notes and financial statement schedule listed in the Index at Item 15(a) and our report dated January 30, 2019 expressed an unqualified opinion thereon. This material weakness was considered in determining the nature, timing and extent of audit tests applied in our audit of the 2018 consolidated financial statements, and this report does not affect our report dated January 30, 2019 which expressed an unqualified opinion thereon.

Basis for Opinion

        The Company's management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the company'sCompany's internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.


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        We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States).PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

        Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

        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 (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

        Because of 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.

        In our opinion, Silicon Laboratories Inc. maintained, in all material respects, effective internal control over financial reporting as of December 31, 2016, based on the COSO criteria.

        We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Silicon Laboratories Inc. as of December 31, 2016 and January 2, 2016, and the related consolidated statements of income, comprehensive income, changes in stockholders' equity and cash flows for each of the three fiscal years in the period ended December 31, 2016 of Silicon Laboratories Inc. and our report dated February 1, 2017 expressed an unqualified opinion thereon.

  /s/ ERNSTErnst & YOUNGYoung LLP

Austin, Texas
February 1, 2017January 30, 2019, except for the effect of the material weakness described in the second and third paragraphs above, as to which the date is May 3, 2019


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Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of Silicon Laboratories Inc.

Opinion on the Financial Statements

        We have audited the accompanying consolidated balance sheets of Silicon Laboratories Inc. (the Company) as of December 31, 201629, 2018 and January 2, 2016, andDecember 30, 2017, the related consolidated statements of income, comprehensive income, changes in stockholders' equity and cash flows for each of the three fiscal years in the period ended December 31, 2016. Our audits also included29, 2018, and the related notes and financial statement schedule listed in the Index at Item 15(a). These (collectively referred to as the "consolidated financial statements and schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

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

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of Silicon Laboratories Inc.the Company at December 31, 201629, 2018 and January 2, 2016,December 30, 2017, and the consolidated results of its operations and its cash flows for each of the three fiscal years in the period ended December 31, 2016,29, 2018, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, present fairly in all material respects the information set forth therein.

        We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), Silicon Laboratories Inc.'sthe Company's internal control over financial reporting as of December 31, 2016,29, 2018, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 1, 2017January 30, 2019, except for the effect of the material weakness described in the second and third paragraphs of that report, as to which the date is May 3, 2019, expressed an unqualifiedadverse opinion thereon.

Adoption of ASU No. 2014-09

        As discussed in Note 2 to the consolidated financial statements, the Company changed its method of accounting for revenue from sales to distributors in 2018 due to the adoption of ASU No. 2014-09,Revenue from Contracts with Customers (Topic 606).

Basis for Opinion

        These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

        We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

  /s/ ERNSTErnst & YOUNGYoung LLP

We have served as the Company's auditor since 1996.
Austin, Texas
February 1, 2017January 30, 2019


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Silicon Laboratories Inc.
Consolidated Balance Sheets
(In thousands, except per share data)


 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

Assets

          

Current assets:

          

Cash and cash equivalents

 $141,106 $114,085  $197,043 $269,366 

Short-term investments

 153,961 128,901  416,779 494,657 

Accounts receivable, net

 74,401 73,601  73,194 71,367 

Inventories

 59,578 53,895  74,972 73,132 

Prepaid expenses and other current assets

 61,805 52,658  64,650 39,120 

Total current assets

 490,851 423,140  826,638 947,642 

Long-term investments

 5,196 7,126 

Property and equipment, net

 129,559 131,132  139,049 127,682 

Goodwill

 276,130 272,722  397,344 288,227 

Other intangible assets, net

 103,565 121,354  170,832 83,144 

Other assets, net

 76,543 55,989  90,491 88,387 

Total assets

 $1,081,844 $1,011,463  $1,624,354 $1,535,082 

Liabilities and Stockholders' Equity

          

Current liabilities:

          

Accounts payable

 $39,577 $42,127  $41,171 $38,851 

Current portion of long-term debt

  10,000 

Accrued expenses

 50,100 52,131 

Deferred revenue and returns liability

 22,494  

Deferred income on shipments to distributors

 45,568 35,448   50,115 

Income taxes

 4,450 2,615 

Other current liabilities

 81,180 73,359 

Total current liabilities

 139,695 142,321  144,845 162,325 

Long-term debt

 72,500 67,500 

Convertible debt

 354,771 341,879 

Other non-current liabilities

 42,691 40,528  57,448 77,862 

Total liabilities

 254,886 250,349  557,064 582,066 

Commitments and contingencies

          

Stockholders' equity:

          

Preferred stock—$0.0001 par value; 10,000 shares authorized; no shares issued and outstanding

   

Common stock—$0.0001 par value; 250,000 shares authorized; 41,889 and 41,727 shares issued and outstanding at December 31, 2016 and January 2, 2016, respectively

 4 4 

Preferred stock—$0.0001 par value; 10,000 shares authorized; no shares issued

   

Common stock—$0.0001 par value; 250,000 shares authorized; 43,088 and 42,707 shares issued and outstanding at December 29, 2018 and December 30, 2017, respectively

 4 4 

Additional paid-in capital

 24,463 13,868  107,517 102,862 

Retained earnings

 801,999 747,749  961,343 851,307 

Accumulated other comprehensive income (loss)

 492 (507)

Accumulated other comprehensive loss

 (1,574) (1,157)

Total stockholders' equity

 826,958 761,114  1,067,290 953,016 

Total liabilities and stockholders' equity

 $1,081,844 $1,011,463  $1,624,354 $1,535,082 

   

The accompanying notes are an integral part of these Consolidated Financial Statements.


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Silicon Laboratories Inc.
Consolidated Statements of Income
(In thousands, except per share data)


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Revenues

 $697,626 $644,826 $620,704  $868,267 $768,867 $697,626 

Cost of revenues

 276,122 264,056 242,153  346,868 314,676 276,122 

Gross margin

 421,504 380,770 378,551  521,399 454,191 421,504 

Operating expenses:

              

Research and development

 199,744 188,050 172,985  238,347 209,491 199,744 

Selling, general and administrative

 155,483 160,486 154,145  197,844 159,726 155,483 

Operating expenses

 355,227 348,536 327,130  436,191 369,217 355,227 

Operating income

 66,277 32,234 51,421  85,208 84,974 66,277 

Other income (expense):

              

Interest income

 1,291 730 1,007 

Interest income and other, net

 6,647 6,057 806 

Interest expense

 (2,587) (2,828) (3,154) (19,694) (14,128) (2,587)

Other, net

 (485) 127 (234)

Income before income taxes

 64,496 30,263 49,040  72,161 76,903 64,496 

Provision for income taxes

 3,002 677 11,019 

Provision (benefit) for income taxes

 (11,430) 29,811 3,002 

Net income

 $61,494 $29,586 $38,021  $83,591 $47,092 $61,494 

Earnings per share:

              

Basic

 $1.47 $0.70 $0.88  $1.94 $1.11 $1.47 

Diluted

 $1.45 $0.69 $0.87  $1.90 $1.09 $1.45 

Weighted-average common shares outstanding:

 
 
 
 
 
 
  
 
 
 
 
 
 

Basic

 41,713 42,309 42,970  43,159 42,446 41,713 

Diluted

 42,376 42,945 43,793  44,044 43,332 42,376 

   

The accompanying notes are an integral part of these Consolidated Financial Statements.


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Silicon Laboratories Inc.
Consolidated Statements of Comprehensive Income
(In thousands)


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Net income

 $61,494 $29,586 $38,021  $83,591 $47,092 $61,494 

Other comprehensive income (loss), before tax:

 
 
 
 
 
 
  
 
 
 
 
 
 

Net changes to available-for-sale securities:

              

Unrealized gains (losses) arising during the period

 (179) (425) 1,107  376 (729) (179)

Reclassification for losses included in net income

  10   49   

Net changes to cash flow hedges:

 
 
 
 
 
 
  
 
 
 
 
 
 

Unrealized gains (losses) arising during the period

 1,466 (728) (799) (953)  1,466 

Reclassification for losses included in net income

 249 489 618 

Reclassification for (gains) losses included in net income

 316 (1,808) 249 

Other comprehensive income (loss), before tax

 1,536 (654) 926  (212) (2,537) 1,536 

Provision (benefit) for income taxes

 
537
 
(229

)
 
324
  
(45

)
 
(888

)
 
537
 

Other comprehensive income (loss)

 
999
 
(425

)
 
602
  
(167

)
 
(1,649

)
 
999
 

Comprehensive income

 
$

62,493
 
$

29,161
 
$

38,623
  
$

83,424
 
$

45,443
 
$

62,493
 

   

The accompanying notes are an integral part of these Consolidated Financial Statements.


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Silicon Laboratories Inc.
Consolidated Statements of Changes in Stockholders' Equity
(In thousands)


 Common Stock  
  
  
  Common Stock  
  
  
 

  
 Accumulated
Other
Comprehensive
Income (Loss)
  
   
 Accumulated
Other
Comprehensive
Income (Loss)
  
 

 Number
of Shares
 Par
Value
 Additional
Paid-In
Capital
 Retained
Earnings
 Total
Stockholders'
Equity
  Number
of Shares
 Par
Value
 Additional
Paid-In
Capital
 Retained
Earnings
 Total
Stockholders'
Equity
 

Balance as of December 28, 2013

 42,779 $4 $48,630 $690,612 $(684)$738,562 

Net income

 
 
 
 
38,021
 
 
38,021
 

Other comprehensive income (loss)

     602 602 

Stock issuances, net of shares withheld for taxes

 1,124  13,320   13,320 

Income tax benefit (shortfall) from stock-based awards

   120   120 

Repurchases of common stock

 (1,678)  (71,676)   (71,676)

Stock-based compensation

   39,107   39,107 

Balance as of January 3, 2015

 42,225 4 29,501 728,633 (82) 758,056 

Net income

 
 
 
 
29,586
 
 
29,586
 

Other comprehensive income (loss)

     (425) (425)

Stock issuances, net of shares withheld for taxes

 1,152  3,128   3,128 

Income tax benefit (shortfall) from stock-based awards

   (613)   (613)

Repurchases of common stock

 (1,650)  (60,978) (10,470)  (71,448)

Stock-based compensation

   42,830   42,830 

Balance as of January 2, 2016

 41,727 4 13,868 747,749 (507) 761,114  41,727 $4 $13,868 $747,749 $(507)$761,114 

Net income

 
 
 
 
61,494
 
 
61,494
  
 
 
 
61,494
 
 
61,494
 

Other comprehensive income (loss)

     999 999      999 999 

Stock issuances, net of shares withheld for taxes

 1,055  6,346   6,346  1,055  6,346   6,346 

Income tax benefit (shortfall) from stock-based awards

   (2,061)   (2,061)   (2,061)   (2,061)

Repurchases of common stock

 (893)  (33,299) (7,244)  (40,543) (893)  (33,299) (7,244)  (40,543)

Stock-based compensation

   39,609   39,609    39,609   39,609 

Balance as of December 31, 2016

 41,889 $4 $24,463 $801,999 $492 $826,958  41,889 4 24,463 801,999 492 826,958 

Cumulative effect of adoption of accounting standard

 
 
 
 
2,216
 
 
2,216
 

Net income

    47,092  47,092 

Other comprehensive income (loss)

     (1,649) (1,649)

Stock issuances, net of shares withheld for taxes

 818  (3,938)   (3,938)

Stock-based compensation

   44,809   44,809 

Convertible debt issuance

   37,528   37,528 

Balance as of December 30, 2017

 42,707 4 102,862 851,307 (1,157) 953,016 

Cumulative effect of adoption of accounting standard

 
 
 
 
26,445
 
(250

)
 
26,195
 

Net income

    83,591  83,591 

Other comprehensive income (loss)

     (167) (167)

Stock issuances, net of shares withheld for taxes

 815  (6,180)   (6,180)

Repurchases of common stock

 (434)  (39,276)   (39,276)

Stock-based compensation

   50,111   ��50,111 

Balance as of December 29, 2018

 43,088 $4 $107,517 $961,343 $(1,574)$1,067,290 

   

The accompanying notes are an integral part of these Consolidated Financial Statements.


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Silicon Laboratories Inc.
Consolidated Statements of Cash Flows
(In thousands)


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Operating Activities

              

Net income

 $61,494 $29,586 $38,021  $83,591 $47,092 $61,494 

Adjustments to reconcile net income to cash provided by operating activities:

              

Depreciation of property and equipment

 13,216 12,517 12,561  15,912 14,766 13,216 

Amortization of other intangible assets and other assets

 27,715 29,131 17,923  44,102 27,246 27,715 

Amortization of debt discount and debt issuance costs

 12,892 10,146  

Stock-based compensation expense

 39,628 42,791 39,067  50,077 44,752 39,628 

Income tax benefit (shortfall) from stock-based awards

 (1,099) 469 489 

Excess income tax benefit from stock-based awards

 (572) (2,497) (632)

Income tax shortfall from stock-based awards

   (1,671)

Deferred income taxes

 (4,087) (2,136) 3,054  (8,210) (26,452) (4,087)

Changes in operating assets and liabilities:

              

Accounts receivable

 46 1,702 1,757  3,931 3,234 46 

Inventories

 (6,093) 2,093 (7,170) 7,660 (13,416) (6,093)

Prepaid expenses and other assets

 (3,568) (870) 9,332  (4,960) 25,266 (3,568)

Accounts payable

 263 6,662 11,475  5,952 (468) 263 

Accrued expenses

 5,919 1,682 27,671 

Deferred income on shipments to distributors

 9,713 (5,298) 7,809 

Income taxes

 (3,040) 776 (3,371)

Other current liabilities and income taxes

 (21,828) 61,924 2,879 

Deferred income, deferred revenue and returns liability

 (6,202) 4,453 9,713 

Other non-current liabilities

 (10,625) (11,161) (20,543) (9,375) (9,022) (10,625)

Net cash provided by operating activities

 128,910 105,447 137,443  173,542 189,521 128,910 

Investing Activities

 
 
 
 
 
 
  
 
 
 
 
 
 

Purchases of available-for-sale investments

 (185,231) (107,366) (166,094) (395,904) (636,363) (185,231)

Sales and maturities of available-for-sale investments

 161,921 171,831 156,520  474,129 294,452 161,921 

Purchases of property and equipment

 (10,927) (11,268) (11,225) (24,462) (12,252) (10,927)

Purchases of other assets

 (8,801) (6,399) (5,514) (11,063) (4,960) (8,801)

Acquisitions of businesses, net of cash acquired

 (6,546) (96,112)   (239,729) (15,168) (6,546)

Net cash used in investing activities

 (49,584) (49,314) (26,313) (197,029) (374,291) (49,584)

Financing Activities

 
 
 
 
 
 
  
 
 
 
 
 
 

Proceeds from issuance of long-term debt, net

  81,238    389,468  

Payments on debt

 (5,000) (94,706) (7,500)  (72,500) (5,000)

Repurchases of common stock

 (40,543) (71,448) (71,676) (39,276)  (40,543)

Payment of taxes withheld for vested stock awards

 (11,133) (13,869) (9,622) (19,483) (15,753) (10,561)

Proceeds from the issuance of common stock

 13,299 16,998 22,942  13,303 11,815 13,299 

Excess income tax benefit from stock-based awards

 572 2,497 632 

Payment of acquisition-related contingent consideration

 (9,500) (4,464)   (3,380)  (9,500)

Net cash used in financing activities

 (52,305) (83,754) (65,224)

Net cash provided by (used in) financing activities

 (48,836) 313,030 (52,305)

Increase (decrease) in cash and cash equivalents

 
27,021
 
(27,621

)
 
45,906
  
(72,323

)
 
128,260
 
27,021
 

Cash and cash equivalents at beginning of period

 114,085 141,706 95,800  269,366 141,106 114,085 

Cash and cash equivalents at end of period

 $141,106 $114,085 $141,706  $197,043 $269,366 $141,106 

Supplemental Disclosure of Cash Flow Information:

              

Interest paid

 $2,222 $2,470 $2,950  $6,227 $3,859 $2,222 

Income taxes paid

 $11,185 $2,157 $11,587  $20,599 $8,929 $11,185 

Supplemental Disclosure of Non-Cash Activity:

              

Stock issued in business combination

 $4,181 $ $  $ $ $4,181 

   

The accompanying notes are an integral part of these Consolidated Financial Statements.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018

1. Description of Business

        Silicon Laboratories Inc. (the "Company"), a Delaware corporation, is a leading provider of silicon, software and solutions for a smarter, more connected world. Our award-winning technologies are shaping the future of the Internet of Things (IoT), Internet infrastructure, industrial automation, consumer and automotive markets. Within the semiconductor industry, the Company is known as a "fabless" company meaning that the integrated circuits (ICs) incorporated in its products are manufactured by third-party foundry semiconductor companies.

2. Significant Accounting Policies

Basis of Presentation and Principles of Consolidation

        The Company prepares financial statements on a 52- or 53-week fiscal year that ends on the Saturday closest to December 31. Fiscal 20162018, 2017 and 20152016 had 52 weeks and ended on December 29, 2018, December 30, 2017 and December 31, 2016, and January 2, 2016, respectively. Fiscal 2014 had 53 weeks with the extra week occurring in the fourth quarter of the year and ended on January 3, 2015. The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Foreign Currency Transactions

        The Company's foreign subsidiaries are considered to be extensions of the U.S. Company. The functional currency of the foreign subsidiaries is the U.S. dollar. Accordingly, gains and losses resulting from remeasuring transactions denominated in currencies other than U.S. dollars are included in interest income and other, net in the Consolidated Statements of Income.

Use of Estimates

        The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Among the significant estimates affecting the financial statements are those related to inventories, stock-based compensation, investments in auction-rate securities,goodwill, acquired intangible assets, goodwill,other long-lived assets, revenue recognition, stock-based compensation and income taxes. Actual results could differ from those estimates, and such differences could be material to the financial statements.

ReclassificationsAdoption of New Revenue Accounting Standard

        Certain reclassifications        The Company adopted Accounting Standards Codification (ASC) Topic 606,Revenue from Contracts with Customers, on December 31, 2017, the first day of its fiscal year ended December 29, 2018. The Company elected the modified retrospective method of adoption which only applies to those contracts which were not completed as of December 31, 2017. Prior periods have not been adjusted. In connection with its adoption of ASC 606, the Company recorded a cumulative-effect adjustment to


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

2. Significant Accounting Policies (Continued)

retained earnings of $26.2 million on December 31, 2017. The following reflects the material changes recorded in connection with the cumulative-effect adjustment (in thousands):

Financial Statement Line Item Increase
(Decrease)
 

Accounts receivable, net

 $230 

Prepaid expenses and other current assets

 $7,579 

Other assets, net

 $(2,282)

Deferred revenue and returns liability

 $27,806 

Deferred income on shipments to distributors

 $(50,115)

Other current liabilities

 $1,641 

Retained earnings

 $26,195 

        The following presents the amounts by which financial statement line items were affected in the current period due to the adoption of ASC 606 (in thousands):

Financial Statement Line Item* Increase
(Decrease)
 
Consolidated Statements of Income Year Ended
December 29,
2018
 

Revenues

 $12,943 

Cost of revenues

 $4,234 

Net income

 $6,610 

Earnings per share:

    

Basic

 $0.15 

Diluted

 $0.15 


Consolidated Balance Sheet** December 29,
2018
 

Prepaid expenses and other current assets

 $5,953 

Goodwill

 $(2,842)

Other assets, net

 $(4,464)

Deferred revenue and returns liability

 $22,494 

Deferred income on shipments to distributors

 $(60,789)

Other current liabilities

 $4,282 

Retained earnings

 $32,805 

*
Excludes line items that were not materially affected by the Company's adoption of ASC 606. The adoption had no impact to cash provided by or used in net operating, investing or financing activities in the Consolidated Statements of Cash Flows.

**
Balance sheet line item amounts include the cumulative-effect adjustment recorded on December 31, 2017.

        The primary impact of the Company's adoption of ASC 606 resulted from the acceleration of the timing of revenue recognition on sales to distributors. The Company previously deferred revenue and


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

2. Significant Accounting Policies (Continued)

cost of revenue on such sales until the distributors sold the product to the end customers. The Company now recognizes revenue at the time of sale to the distributor provided all other revenue recognition criteria have been mademet. The Company records a right of return asset and a returns liability in place of the deferred income on shipments to prior year financial statements to conform to current year presentation.distributors previously recorded under ASC 605.

Fair Value of Financial Instruments

        The fair values of the Company's financial instruments are recorded using a hierarchical disclosure framework based upon the level of subjectivity of the inputs used in measuring assets and liabilities. The three levels are described below:

    Level 1—Inputs are unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

2. Significant Accounting Policies (Continued)

    Level 2—Inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.

    Level 3—Inputs are unobservable for the asset or liability and are developed based on the best information available in the circumstances, which might include the Company's own data.

Cash and Cash Equivalents

        Cash and cash equivalents consist of cash deposits, certificates of deposit, money market funds and investments in debt securities with original maturities of ninety days or less when purchased.

Investments

        The Company's investments typically have original maturities greater than ninety days as of the date of purchase and are classified as either available-for-sale or trading securities. Investments in available-for-sale securities are reported at fair value, with unrealized gains and losses, net of tax, recorded as a component of accumulated other comprehensive income (loss)loss in the Consolidated Balance Sheet. Investments in trading securities are reported at fair value, with both realized and unrealized gains and losses recorded in interest income and other, net in the Consolidated Statement of Income. Investments in which the Company has the ability and intent, if necessary, to liquidate in order to support its current operations (including those with contractual maturities greater than one year from the date of purchase) are classified as short-term.

        The Company reviews its available-for-sale investments as of the end of each reporting period for other-than-temporary declines in fair value based on the specific identification method. The Company considers various factors in determining whether an impairment is other-than-temporary, including the severity and duration of the impairment, changes in underlying credit ratings, forecasted recovery, its intent to sell or the likelihood that it would be required to sell the investment before its anticipated recovery in market value and the probability that the scheduled cash payments will continue to be made. When the Company concludes that an other-than-temporary impairment has occurred, the Company assesses whether it intends to sell the security or if it is more likely than not that it will be required to sell the security before recovery. If either of these two conditions is met, the Company recognizes a charge in earnings equal to the entire difference between the security's amortized cost basis and its fair value. If the Company does not intend to sell a security and it is not more likely than


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

2. Significant Accounting Policies (Continued)

not that it will be required to sell the security before recovery, the unrealized loss is separated into an amount representing the credit loss, which is recognized in earnings, and the amount related to all other factors, which is recorded in accumulated other comprehensive income (loss).loss.

        In addition, the Company has made equity investments in non-publicly traded companies that it accountscompanies. Equity investments in which the Company does not have control, but has the ability to exercise significant influence over operating and financial policies, are accounted for underusing the equity method. The Company's proportionate share of income or loss is recorded in interest income and other, net in the Consolidated Statement of Income. All other non-marketable equity investments are recorded at cost minus impairment, if any, plus or minus changes resulting from qualifying observable price changes. Prior to fiscal 2018, all other non-marketable equity investments were accounted for using the cost method. The Company periodically reviews theseits equity investments for other-than-temporary declines in fair value based on the specific identification method and writes down investments to their fair values when it determines that an other-than-temporary decline has occurred. There were no impairment charges recognized on equity investments during any of the periods presented.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

2. Significant Accounting Policies (Continued)

Derivative Financial Instruments

        The Company uses derivative financial instruments to manage certain exposures to the variability of interestforeign currency exchange rates and foreign currency exchangeinterest rates. The Company's objective is to offset increases and decreases in expenses resulting from these exposures with gains and losses on the derivative contracts, thereby reducing volatility of earnings. The Company does not use derivative contracts for speculative or trading purposes. The Company recognizes derivatives, on a gross basis, in the Consolidated Balance Sheet at fair value. Cash flows from derivatives are classified according to the nature of the cash receipt or payment in the Consolidated Statement of Cash Flows.

        TheCash flow hedges used by the Company usesinclude foreign currency forward contracts and interest rate swap agreements. Foreign currency forward contracts are used to reduce the earnings impact that exchange rate fluctuations have on operating expenses denominated in currencies other than the U.S. dollar. Interest rate swap agreements are used to manage exposure to interest rate risks. The swap agreements are designated and qualify as cash flow hedges. The effective portion of the gain or loss on the interest rate swaps is recorded in accumulated other comprehensive income (loss) as a separate component of stockholders' equity and is subsequently recognized as interest expense in the Consolidated Statement of Income when the hedged exposure affects earnings.

        The Company also uses foreign currency forward contracts to manage exposure to foreign exchange risk. These instruments are used to reduce the earnings impact that exchange rate fluctuations have on non-U.S. dollar balance sheet exposures. The Company recognizes gains and losses on the foreign currency forward contracts in other, net in the Consolidated Statement of Income in the same period as the remeasurement loss and gain of the related foreign currency denominated asset or liability. The Company does not apply hedge accounting to itsthese foreign currency derivative instruments.forward contracts.

Inventories

        Inventories are stated at the lower of cost, determined using the first-in, first-out method, or market.net realizable value. The Company writes down the carrying value of inventory to net realizable value for estimated obsolescence or unmarketable inventory based upon assumptions about the age of inventory, future demand and market conditions. Inventory impairment charges establish a new cost basis for inventory and charges are not subsequently reversed to income even if circumstances later suggest that increased carrying amounts are recoverable.

Property and Equipment

        Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is computed using the straight-line method over the useful lives of the assets ranging from three to seven ten


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

2. Significant Accounting Policies (Continued)

years. Leasehold improvements are depreciated over the contractual lease periodterm or their useful life, whichever is shorter.

        The Company owns the facilities it had previously leased for its headquarters in Austin, Texas. The buildings are located on land which is leased through 2099 from a third party. The rents for these ground leases were prepaid for the term of the leases by the previous lessee. The buildings and leasehold interest in ground leases are being depreciated on a straight-line basis over their estimated useful lives of 40 years and 86 years, respectively.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

2. Significant Accounting Policies (Continued)

Business Combinations

        The Company records business combinations using the acquisition method of accounting and, accordingly, allocates the fair value of purchase consideration to the assets acquired and liabilities assumed based on their fair values at the acquisition date. The excess of the fair value of purchase consideration over the fair value of the assets acquired and liabilities assumed is recorded as goodwill. The results of operations of the businesses acquired are included in the Company's consolidated results of operations beginning on the date of the acquisition.

Long-Lived Assets

        Purchased intangible assets are stated at cost, net of accumulated amortization, and are amortized using the straight-line method over their estimated useful lives, ranging from twothree to twelve years. Fair values are determined primarily using the income approach, in which the Company projects future expected cash flows and applies an appropriate discount rate.

        Long-lived assets "held and used" by the Company are reviewed for impairment whenever events or changes in circumstances indicate that their net book value may not be recoverable. When such factors and circumstances exist, the Company compares the projected undiscounted future cash flows associated with the related asset or group of assets over their estimated useful lives against their respective carrying amounts. Impairment, if any, is based on the excess of the carrying amount over the fair value of those assets and is recorded in the period in which the determination was made.

        The carrying value of goodwill is reviewed at least annually by the Company for possible impairment. The goodwill impairment test is a two-step process. The first step of the impairment analysis compares the fair value of the reporting unit to the net book value of the reporting unit. In determining fair value, several valuation methodologies are allowed, although quoted market prices are the best evidence of fair value. If the results of the first step demonstrate that the net book value is greater than the fair value, the Company must proceed to step two of the analysis. Step two of the analysis compares the implied fair value of goodwill to its carrying amount. If the carrying amount of goodwill exceeds its implied fair value, an impairment loss is recognized equal to that excess. The Company tests goodwill for impairment annually as of the first day of its fourth fiscal quarter and in interim periods if events occur that would indicate that the carrying value of goodwill may be impaired.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

2. Significant Accounting Policies (Continued)

Revenue Recognition

        Revenues are generated predominately by salesRevenue is recognized when control of the promised goods or services is transferred to customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services.

Performance Obligations

        Substantially all of the Company's contracts with customers contain a single performance obligation, the sale of mixed-signal integrated circuit (IC) products. The Company recognizes revenueSuch sales represent a single performance obligation because the sale is one type of good (e.g., an IC) or includes multiple goods that are neither capable of being distinct nor separable from the other promises in the contract (e.g., an IC embedded with software). This performance obligation is satisfied when allcontrol of the following criteriaproduct is transferred to the customer, which typically occurs upon delivery. Unsatisfied performance obligations primarily represent contracts for products with future delivery dates and with an original expected duration of one year or less. As allowed under ASC 606, the Company has opted to not disclose the amount of unsatisfied performance obligations as these contracts have original expected durations of less than one year.

        The Company's products carry a one-year replacement warranty. The replacement warranty promises customers that delivered products are met: 1) there is persuasive evidence that an arrangement exists, 2) delivery of goods has occurred, 3)as specified in the salescontract (an "assurance-type warranty"). Therefore, the Company accounts for such warranties under ASC 460,Guarantees, and not as a separate performance obligation.

Transaction Price

        The transaction price isreflects the Company's expectations about the consideration it will be entitled to receive from the customer and may include fixed or determinable, and 4) collectibility is reasonably assured. Generally, revenue from productvariable amounts. Fixed consideration primarily includes sales to direct customers and contract manufacturerssales to distributors in which both the sale to the distributor and the sale to the end customer occur within the same reporting period. Variable consideration includes sales in which the amount of consideration that the Company will receive is recognized upon shipment.

        A portionunknown as of the Company'send of a reporting period. Such consideration primarily includes sales are made to distributors under agreements allowing certain rights of return, referred to as stock rotation, and price protection relatedcredits issued to the final sellingdistributor due to price protection. Stock rotation allows distributors limited levels of returns and is based on the distributor's prior purchases. Price protection represents price discounts granted to certain distributors and is based on negotiations on sales to end customers.

        The Company estimates variable consideration at the most likely amount to which it expects to be entitled. Included in the transaction price estimate are amounts in which it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. The estimate is based on information available to the end customers. Accordingly,Company, including recent sales activity and pricing data. The Company applies a constraint to its variable consideration estimate which considers both the likelihood of a return and the amount of a potential price concession.

        Variable consideration that does not meet revenue recognition criteria is deferred. The Company defers revenuerecords a right of return asset in prepaid expenses and costother current assets for the costs of revenue on such sales until the distributors sell the product to the end customers. The net balance of deferred revenue less deferred cost of revenue associated with inventory shipped to a distributor but not yet sold to an end customer is recorded in the deferred


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

2. Significant Accounting Policies (Continued)

incomeinventory not meeting revenue recognition criteria. A corresponding deferred revenue and returns liability amount is recorded for unrecognized revenue associated with such costs.

Contract Balances

        Accounts receivable represents the Company's unconditional right to receive consideration from its customer. Payments are typically due within 30 days of invoicing and do not include a significant financing component. To date, there have been no material impairment losses on shipments to distributors liabilityaccounts receivable. There were no material contract assets or contract liabilities recorded on the Consolidated Balance Sheet. Such net deferred income balance reflects the Company's estimateSheet in any of the impact of rights of return and price protection.

        A small portion of the Company's revenues is derived from the sale of patents. The above revenue recognition criteria for patent sales are generally met upon the execution of the patent sale agreement.periods presented.

Shipping and Handling

        Shipping and handling costs are classified as a component of cost of revenues in the Consolidated Statements of Income.

Stock-Based Compensation

        The Company has stock-based compensation plans, which are more fully described in Note 12,14,Stock-Based Compensation. The Company accounts for those plans using a fair-value method and recognizes the expense in its Consolidated Statement of Income.

Research and Development

        Research and development costs are expensed as incurred. Research and development expense consists primarily of personnel-related expenses, including stock-based compensation, as well as new product masks, external consulting and services costs, equipment tooling, equipment depreciation, amortization of intangible assets, and an allocated portion of our occupancy costs. Assets purchased to support the Company's ongoing research and development activities are capitalized when related to products which have achieved technological feasibility or have an alternative future use, and are amortized over their estimated useful lives.

Advertising

        Advertising costs are expensed as incurred. Advertising expenses were $1.6$1.9 million, $1.8$1.4 million and $1.7$1.6 million in fiscal 2016, 20152018, 2017 and 2014,2016, respectively.

Income Taxes

        The Company accounts for income taxes using the asset and liability method whereby deferred tax asset and liability account balances are determined based on differences between the financial reporting and the tax bases of assets and liabilities and are measured using the enacted tax laws and related rates that will be in effect when the differences are expected to reverse. These differences result in deferred tax assets and liabilities, which are included in the Company's Consolidated Balance Sheet. The Company then assesses the likelihood that the deferred tax assets will be realized. A valuation allowance is established against deferred tax assets to the extent the Company believes that it is more likely than not that the deferred tax assets will not be realized, taking into consideration the level of


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

2. Significant Accounting Policies (Continued)

historical taxable income and projections for future taxable income over the periods in which the temporary differences are deductible.

        Uncertain tax positions must meet a more-likely-than-not threshold to be recognized in the financial statements and the tax benefits recognized are measured based on the largest benefit that has


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

2. Significant Accounting Policies (Continued)

a greater than 50% likelihood of being realized upon final settlement. See Note 16,17,Income Taxes, for additional information.

Recent Accounting Pronouncements

        In January 2017,February 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-012018-02,, Business CombinationsIncome Statement—Reporting Comprehensive Income (Topic 805)220): Clarifying the DefinitionReclassification of a Business.Certain Tax Effects from Accumulated Other Comprehensive Income. This ASU clarifiesallows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. This ASU is effective for annual periods beginning after December 15, 2017, including interim periods within those periods.Tax Cuts and Jobs Act. The Company is currently evaluating the effect that the adoption ofearly adopted this ASU willon December 31, 2017. The adoption did not have a material impact on its financial statements.

        In August 2016,2017, the FASB issued ASU No. 2016-16,2017-12Income Taxes, Derivatives and Hedging (Topic 740)815): Intra-Entity Transfers of Assets Other Than Inventory.Targeted Improvements to Accounting for Hedging Activities. ThisThe objectives of this ASU requiresare to improve the recognitionfinancial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements and to make certain targeted improvements to simplify the application of the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This ASU is effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, with early adoption permitted. The amendmentshedge accounting guidance in this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company has elected to early adopt this ASU on January 1, 2017. The Company currently expects to record a cumulative-effect adjustment to decrease retained earnings by between $0.0 and $2.5 million with a corresponding adjustment to non-current assets and deferred taxes on the Consolidated Balance Sheet.

        In August 2016, the FASB issued ASU No. 2016-15,Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This ASU provides guidance on statement of cash flows presentation for eight specific cash flow issues where diversity in practice exists.current GAAP. This ASU is effective for fiscal years beginning after December 15, 2017,2018 and interim periods within those fiscal years. The Company early adopted this ASU on December 31, 2017. The adoption did not have a material impact on its financial statements.

        In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This ASU eliminates Step 2 from the goodwill impairment test, which previously measured an impairment loss by comparing the implied fair value of goodwill with its carrying amount. Instead, an entity should recognize an impairment charge for the amount by which the carrying value exceeds the reporting unit's fair value, not to exceed the total amount of goodwill allocated to that reporting unit. This ASU is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The Company is currently evaluating the effect thatof the adoption of this ASU, but anticipates that the adoption will not have a material impact on its financial statements.

        In June 2016, the FASB issued ASU No. 2016-13,Financial Instruments—Credit Losses (Topic326)(Topic 326): Measurement of Credit Losses on Financial Instruments. This ASU requires instruments measured at amortized cost to be presented at the net amount expected to be collected. Entities are also required to record allowances for available-for-sale debt securities rather than reduce the carrying amount. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating the effectexpects that the adoption of this ASU will not have a material impact on its financial statements.

        In March 2016, the FASB issued ASU No. 2016-09,Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This ASU simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. This ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. The Company expects the primary impact of this ASU to be the income tax effects of awards recognized in the income statement when the awards are vested or settled.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

2. Significant Accounting Policies (Continued)

        In February 2016, the FASB issued ASU No. 2016-02,Leases (Topic 842), which was subsequently amended in 2018 by ASU 2018-10, ASU 2018-11 and ASU 2018-20 (collectively, Topic 842). The core principle of Topic 842 is that a lessee should recognize the assets and liabilities that arise from leases. For operating


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

2. Significant Accounting Policies (Continued)

leases, a lessee is required to recognize a right-of-use asset and a lease liability, initially measured at the present value of the lease payments, in the statement of financial position. This ASUTopic 842 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company will elect an optional transition method to account for the impact of the adoption with a cumulative-effect adjustment in the period of adoption and will not restate prior periods. The Company expects to elect certain practical expedients permitted under the transition guidance. The Company is currently evaluatingsubstantially complete with its evaluation of the effect that the adoption of this ASU will have on its financial statements.

        In January 2016, the FASB issued ASU No. 2016-01,Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This ASU addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company is currently evaluatingbelieves that most of its operating lease commitments will be subject to the effect thatnew standard. In connection with the adoption of this ASU will have on its financial statements.

        In July 2015, the FASB issued ASU No. 2015-11,Inventory (Topic 330): Simplifying the Measurement of Inventory. This ASU requires inventory to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. This ASU is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company does not expect that the adoption of this ASU will have a material impact on its financial statements.

        In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Accounting Standards Codification (ASC) 605,Revenue Recognition. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides a five-step process to achieve that core principle. In August 2015, the FASB issued ASU No. 2015-14,Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which deferred the effective date of ASU 2014-09 to annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. In 2016, the FASB issued the following amendments to ASC 606: ASU No. 2016-08,Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which clarifies the implementation guidance on principal versus agent considerations; ASU No. 2016-10,Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, which clarifies guidance on identification of performance obligations and licensing implementation; ASU No. 2016-12,Compensation—Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, which provides clarifying guidance on assessing collectibility, presentation of sales taxes, noncash consideration, contract modifications and completed contracts; and ASU No. 2016-20,Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers, which clarifies narrow aspects of ASC 606 or corrects unintended application of the guidance. The standard may be applied retrospectively to each prior period presented (full retrospective method) or retrospectively with the cumulative effect recognized as of the date of initial application (modified retrospective method). Under the new standard,842, the Company expects the timingto recognize additional right-of-use assets and operating lease liabilities of revenue recognition from sales to distributors to be accelerated. The Company will recognize revenue at the time of sale to the distributor, net of the impact of estimated price adjustments and rights of return.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
$20.8 million on December 31, 2016 (Continued)

2. Significant Accounting Policies (Continued)

The Company currently anticipates adopting this standard using the modified retrospective method. The Company is continuing to evaluate the effect that the adoption will have on its financial statements.30, 2018.

3. Earnings Per Share

        The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Net income

 $61,494 $29,586 $38,021  $83,591 $47,092 $61,494 

Shares used in computing basic earnings per share

 41,713 42,309 42,970  43,159 42,446 41,713 

Effect of dilutive securities:

 
 
 
 
 
 
  
 
 
 
 
 
 

Stock options and other stock-based awards

 663 636 823 

Stock-based awards

 885 886 663 

Shares used in computing diluted earnings per share

 42,376 42,945 43,793  44,044 43,332 42,376 

Earnings per share:

              

Basic

 $1.47 $0.70 $0.88  $1.94 $1.11 $1.47 

Diluted

 $1.45 $0.69 $0.87  $1.90 $1.09 $1.45 

        For fiscal years ended December 31, 2016, January 2, 2016        The Company intends to settle the principal amount of its convertible senior notes in cash and January 3, 2015, approximately 0.1 million, 0.1 million and 0.1 millionany excess value in shares respectively, consistingin the event of restricted stock awards (RSUs),a conversion. Accordingly, shares issuable upon conversion of the principal amount have been excluded from the calculation of diluted earnings per share. If the market stock awards (MSUs) and stock options, were notvalue of the notes under certain prescribed conditions exceeds the conversion amount, the excess is included in the denominator for the computation of diluted earnings per share calculation sinceusing the treasury stock method. For fiscal 2018, approximately 0.1 million shares were anti-dilutive.included in the denominator for the calculation of diluted earnings per share. For fiscal 2017, no such shares were included in the denominator for the calculation of diluted earnings per share. See Note 10,Debt, to the Consolidated Financial Statements for additional information.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

4. Fair Value of Financial Instruments

        The following summarizes the valuation of the Company's financial instruments (in thousands). The tables do not include either cash on hand or assets and liabilities that are measured at historical cost or any basis other than fair value.


 Fair Value Measurements
at December 31, 2016 Using
  
  Fair Value Measurements
at December 29, 2018 Using
  
 
Description
 Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 Significant Other
Observable
Inputs
(Level 2)
 Significant
Unobservable
Inputs
(Level 3)
 Total  Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 Significant Other
Observable
Inputs
(Level 2)
 Significant
Unobservable
Inputs
(Level 3)
 Total 

Assets:

                  

Cash equivalents:

                  

Money market funds

 $69,432 $ $ $69,432  $74,990 $ $ $74,990 

Certificates of deposit

  7,153  7,153 

Municipal bonds

  3,904  3,904 

Corporate debt securities

  18,820  18,820 

Government debt securities

 9,338   9,338 

Total cash equivalents

 $69,432 $11,057 $ $80,489  $84,328 $18,820 $ $103,148 

Short-term investments:

 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 

Municipal bonds

 $ $79,702 $ $79,702 

Corporate bonds

  31,036  31,036 

Variable-rate demand notes

  16,400  16,400 

U.S. government bonds

 12,416   12,416 

Asset-backed securities

  8,173  8,173 

Commercial paper

  5,233  5,233 

International government bonds

  1,001  1,001 

Government debt securities

 $48,141 $99,211 $ $147,352 

Corporate debt securities

  269,427  269,427 

Total short-term investments

 $12,416 $141,545 $ $153,961  $48,141 $368,638 $ $416,779 

Long-term investments:

 
 
 
 
 
 
 
 
 

Other assets, net:

 
 
 
 
 
 
 
 
 

Auction rate securities

 $ $ $5,196 $5,196  $ $ $5,759 $5,759 

Total long-term investments

 $ $ $5,196 $5,196 

Other assets, net:

 
 
 
 
 
 
 
 
 

Derivative instruments

 $ $1,808 $ $1,808 

Total

 $ $1,808 $ $1,808  $ $ $5,759 $5,759 

Total

 $81,848 $154,410 $5,196 $241,454  
$

132,469
 
$

387,458
 
$

5,759
 
$

525,686
 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

4. Fair Value of Financial Instruments (Continued)



 Fair Value Measurements
at January 2, 2016 Using
  
  Fair Value Measurements
at December 30, 2017 Using
  
 
Description
 Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 Significant Other
Observable
Inputs
(Level 2)
 Significant
Unobservable
Inputs
(Level 3)
 Total  Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 Significant Other
Observable
Inputs
(Level 2)
 Significant
Unobservable
Inputs
(Level 3)
 Total 

Assets:

                  

Cash equivalents:

                  

Money market funds

 $37,721 $ $ $37,721  $106,047 $ $ $106,047 

Commercial paper

  11,272  11,272 

Certificates of deposit

  2,845  2,845 

U.S. government agency

  1,599  1,599 

Municipal bonds

  1,577  1,577 

Corporate debt securities

  11,231  11,231 

Government debt securities

 53,615 1,453  55,068 

Total cash equivalents

 $37,721 $17,293 $ $55,014  $159,662 $12,684 $ $172,346 

Short-term investments:

 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 

Municipal bonds

 $ $93,516 $ $93,516 

Commercial paper

  11,176  11,176 

Variable-rate demand notes

  8,995  8,995 

Certificates of deposit

  8,000  8,000 

U.S. government agency

  3,998  3,998 

International government bonds

  2,220  2,220 

Corporate bonds

  996  996 

Government debt securities

 $94,575 $228,247 $ $322,822 

Corporate debt securities

  171,835  171,835 

Total short-term investments

 $ $128,901 $ $128,901  $94,575 $400,082 $ $494,657 

Long-term investments:

 
 
 
 
 
 
 
 
 

Other assets, net:

 
 
 
 
 
 
 
 
 

Auction rate securities

 $ $ $7,126 $7,126  $ $ $5,681 $5,681 

Total long-term investments

 $ $ $7,126 $7,126 

Other assets, net:

 
 
 
 
 
 
 
 
 

Derivative instruments

 $ $92 $ $92 

Total

 $ $92 $ $92  $ $ $5,681 $5,681 

Total

 
$

37,721
 
$

146,286
 
$

7,126
 
$

191,133
  
$

254,237
 
$

412,766
 
$

5,681
 
$

672,684
 

Liabilities:

         

Accrued expenses:

         

Contingent consideration

 $ $ $4,749 $4,749 

Other non-current liabilities:

 
 
 
 
 
 
 
 
 

Contingent consideration

 $ $ $9,324 $9,324 

Total

 $ $ $14,073 $14,073 

Valuation methodology

        The Company's cash equivalents and short-term investments that are classified as Level 2 are valued using non-binding market consensus prices that are corroborated with observable market data; quoted market prices for similar instruments in active markets; or pricing models, such as a discounted cash flow model, with all significant inputs derived from or corroborated with observable market data.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

4. Fair Value of Financial Instruments (Continued)

Investments classified as Level 3 are valued using a discounted cash flow model. The assumptions used in preparing the discounted cash flow model include estimates for interest rates, amount of cash flows, expected holding periods of the securities and a discount to reflect the Company's inability to liquidate the securities. The Company's derivative instruments are valued using discounted cash flow models. The assumptions used in preparing the valuation models include quoted interest swap rates, foreign exchange rates, forward and spot prices for currencies, and market observable data of similar instruments.

        The Company's contingent consideration is valued using a Monte Carlo simulation model or a probability weighted discounted cash flow model. The assumptions used in preparing the Monte Carlo simulation model include estimates for revenue growth rates, revenue volatility, contractual terms and discount rates. The assumptions used in preparing the discounted cash flow model include estimates for outcomes if milestone goals are achieved, the probability of achieving each outcome and discount rates.

Available-for-sale investments

        The Company's investments typically have original maturities greater than ninety days as of the date of purchase. Investments are reported at fair value, with unrealized gains and losses, net of tax, recorded as a component of accumulated other comprehensive income (loss)loss in the Consolidated Balance Sheet. The following summarizes the contractual underlying maturities of the Company's available-for-sale investments at December 31, 2016 (in thousands):

 
 Cost Fair Value 

Due in one year or less

 $159,670 $159,624 

Due after one year through ten years

  59,628  59,426 

Due after ten years

  21,400  20,596 

 $240,698 $239,646 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

4. Fair Value of Financial Instruments (Continued)

The following summarizes the contractual underlying maturities of the Company's available-for-sale investments at December 29, 2018 (in thousands):

 
 Cost Fair Value 

Due in one year or less

 $338,623 $337,910 

Due after one year through ten years

  169,058  168,657 

Due after ten years

  19,360  19,119 

 $527,041 $525,686 

        The available-for-sale investments that were in a continuous unrealized loss position, aggregated by length of time that individual securities have been in a continuous loss position, were as follows (in thousands):


 Less Than 12 Months 12 Months or Greater Total  Less Than 12 Months 12 Months or Greater Total 
As of December 31, 2016
 Fair
Value
 Gross
Unrealized
Losses
 Fair
Value
 Gross
Unrealized
Losses
 Fair
Value
 Gross
Unrealized
Losses
 

Municipal bonds

 $69,379 $(140)$ $ $69,379 $(140)

Corporate bonds

 18,561 (128)   18,561 (128)

U.S. government bonds

 10,364 (16)   10,364 (16)
As of December 29, 2018
 Fair
Value
 Gross
Unrealized
Losses
 Fair
Value
 Gross
Unrealized
Losses
 Fair
Value
 Gross
Unrealized
Losses
 

Government debt securities

 $13,278 $(10)$88,696 $(583)$101,974 $(593)

Corporate debt securities

 112,699 (273) 76,310 (448) 189,009 (721)

Auction rate securities

   5,196 (804) 5,196 (804)   5,759 (241) 5,759 (241)

Asset-backed securities

 3,176 (4)   3,176 (4)

 $101,480 $(288)$5,196 $(804)$106,676 $(1,092) $125,977 $(283)$170,765 $(1,272)$296,742 $(1,555)

 


 Less Than 12 Months 12 Months or Greater Total  Less Than 12 Months 12 Months or Greater Total 
As of January 2, 2016
 Fair
Value
 Gross
Unrealized
Losses
 Fair
Value
 Gross
Unrealized
Losses
 Fair
Value
 Gross
Unrealized
Losses
 

Municipal bonds

 $29,271 $(30)$1,198 $(2)$30,469 $(32)
As of December 30, 2017
 Fair
Value
 Gross
Unrealized
Losses
 Fair
Value
 Gross
Unrealized
Losses
 Fair
Value
 Gross
Unrealized
Losses
 

Government debt securities

 $244,880 $(931)$3,027 $(15)$247,907 $(946)

Corporate debt securities

 151,149 (447) 11,578 (73) 162,727 (520)

Auction rate securities

   7,126 (874) 7,126 (874)   5,681 (319) 5,681 (319)

International government bonds

 2,220 (7)   2,220 (7)

Corporate bonds

 996 (3)   996 (3)

 $32,487 $(40)$8,324 $(876)$40,811 $(916) $396,029 $(1,378)$20,286 $(407)$416,315 $(1,785)

        The gross unrealized losses as of December 31, 201629, 2018 and January 2, 2016December 30, 2017 were due primarily to changes in market interest rates and the illiquidity of the Company's auction-rate securities and, to a lesser extent, to changes in market interest rates.securities. The Company's auction-rate securities have been illiquid since 2008 when auctions for the securities failed because sell orders exceeded buy orders. These securities have a contractual maturity date of 2046 at December 31, 2016.2046. The Company is unable to predict if these funds will become available before their maturity date.

        The Company does not expect to need access toconsiders the capital represented by anydeclines in market value of its auction-ratemarketable securities priorinvestment portfolio to their maturities. Thebe temporary in nature. When evaluating an investment for other-than-temporary impairment, the Company does not intendreviews factors such as the severity and duration of the impairment, changes in underlying credit ratings, forecasted recovery, the Company's intent to sell and believes it is not more likely than notor the likelihood that it willwould be required to sell its auction-rate securitiesthe investment before theirits anticipated recovery in market value or final settlement atand the underlying par value. The Company believesprobability that the credit ratings and credit supportscheduled cash payments will continue to be made. As of the security issuers indicate that they have the ability to settle the securities at par value. As such,December 29, 2018, the Company has determined that no other-than-temporary impairment losses existed as of December 31, 2016.

        At December 31, 2016 and January 2, 2016, there were no material unrealized gains associated with the Company's available-for-sale investments.existed.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

4. Fair Value of Financial Instruments (Continued)

        At December 29, 2018 and December 30, 2017, there were no material unrealized gains associated with the Company's available-for-sale investments.

Level 3 fair value measurements

        The following summarizes quantitative information about Level 3 fair value measurements.

Auction rate securities

Fair Value at
December 31, 2016
(000s)
 Valuation Technique Unobservable Input Weighted
Average
$5,196 Discounted cash flow Estimated yield 1.09%

 

 

 

 

Expected holding period

 

10 years

 

 

 

 

Estimated discount rate

 

3.89%
Fair Value at
December 29, 2018
(000s)
 Valuation Technique Unobservable Input Weighted
Average
$5,759 Discounted cash flow Estimated yield 3.23%

 

 

 

 

Expected holding period

 

10 years

 

 

 

 

Estimated discount rate

 

3.76%

        The Company has followed an established internal control procedure used in valuing auction rate securities. The procedure involves the analysis of valuation techniques and evaluation of unobservable inputs commonly used by market participants to price similar instruments, and which have been demonstrated to provide reasonable estimates of prices obtained in actual market transactions. Outputs from the valuation process are assessed against various market sources when they are available, including marketplace quotes, recent trades of similar illiquid securities, benchmark indices and independent pricing services. The technique and unobservable input parameters may be recalibrated periodically to achieve an appropriate estimation of the fair value of the securities.

        Significant changes in any of the unobservable inputs used in the fair value measurement of auction rate securities in isolation could result in a significantly lower or higher fair value measurement. An increase in expected yield would result in a higher fair value measurement, whereas an increase in expected holding period or estimated discount rate would result in a lower fair value measurement. Generally, a change in the assumptions used for expected holding period is accompanied by a directionally similar change in the assumptions used for estimated yield and discount rate.

        The following summarizes the activity in Level 3 financial instruments for the years ended December 29, 2018 and December 30, 2017 (in thousands):

Contingent considerationAssets

        The Company has followed an established internal control procedure used in valuing contingent consideration. The valuation of contingent consideration for the Energy Micro acquisition was based on a Monte Carlo simulation model. The fair value of this valuation was estimated on a quarterly basis through a collaborative effort by the Company's sales, marketing and finance departments.

 
 Year Ended 
Auction Rate Securities
 December 29,
2018
 December 30,
2017
 

Beginning balance

 $5,681 $5,196 

Gain included in other comprehensive income (loss)

  78  485 

Ending balance

 $5,759 $5,681 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

4. Fair Value of Financial Instruments (Continued)

        The following summarizes the activity in Level 3 financial instruments for the years ended December 31, 2016 and January 2, 2016 (in thousands):

Assets

 
 Year Ended 
Auction Rate Securities
 December 31,
2016
 January 2,
2016
 

Beginning balance

 $7,126 $7,419 

Settlements

  (2,000)  

Gain (loss) included in other comprehensive income (loss)

  70  (293)

Ending balance

 $5,196 $7,126 

Liabilities

 
 Year Ended 
Contingent Consideration (1)
 December 31,
2016
 January 2,
2016
 

Beginning balance

 $14,073 $18,438 

Settlements (2)

  (11,375) (4,464)

(Gain) loss recognized in earnings (3)

  (2,698) 99 

Balance at December 31, 2016

 $ $14,073 

Net loss for the period included in earnings attributable to contingent consideration held at the end of the period:

 $ $(99)

Year Ended
Contingent Consideration (1)
December 30,
2017

Beginning balance

$

Issues

3,829

Reclassification to acquisition-related liabilities

(3,380)

Gain recognized in selling, general and administrative expenses

(449)

Ending balance

$

(1)
In connection with the acquisition of Energy Micro,Zentri, the Company recorded contingent consideration based upon the expected achievement ofon fiscal 2017 revenue from certain milestone goals. Changes to the fair value of contingent consideration due to changes in assumptions used in preparing the valuation model were recorded in selling, general and administrative expenses in the Consolidated Statement of Income.

(2)
On March 11, 2016, the Company entered into an agreement which settled the total amount of contingent consideration related to the Energy Micro acquisition (including all amounts for fiscal 2015 through 2018). See Note 8,Acquisitions, for additional information.

(3)
The gain recognized in earnings was due to the settlement of the Energy Micro contingent consideration. This gain was offset in part by a charge of approximately $2.7 million recorded in fiscal 2016 for a portion of the contingent consideration accounted for as post-combination compensation expense.Zentri products.

Fair values of other financial instruments

        The Company's debt under the Credit Facilities bears interest at the Eurodollar rate plus an applicable margin. The Credit Facilities areis recorded at cost, but areis measured at fair value for


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

4. Fair Value of Financial Instruments (Continued)

disclosure purposes. FairThe fair value of the Company's convertible senior notes is estimated based ondetermined using observable market prices. The notes are traded in less active markets and are therefore classified as a Level 2 inputs, using a discounted cash flow analysis of future principal payments and projected interest based on current market rates.fair value measurement. As of December 31, 201629, 2018 and January 2, 2016,December 30, 2017, the fair value of the Company's debt under the Credit Facilitiesconvertible senior notes was approximately $72.5$419.0 million and $77.5$466.2 million, respectively.

        The Company's other financial instruments, including cash, accounts receivable and accounts payable, are recorded at amounts that approximate their fair values due to their short maturities.

5. Derivative Financial Instruments

        The Company uses derivative financial instruments to manage certain exposures to the variability of interestforeign currency exchange rates and foreign currency exchangeinterest rates. The Company's objective is to offset increases and decreases in expenses resulting from these exposures with gains and losses on the derivative contracts, thereby reducing volatility of earnings.

Cash Flow Hedges

Foreign Currency Forward Contracts

        The Company uses foreign currency forward contracts to reduce the earnings impact that exchange rate fluctuations have on operating expenses denominated in currencies other than the U.S. dollar. Changes in the fair value of the contracts are recorded in accumulated other comprehensive loss in the Consolidated Balance Sheet and subsequently reclassified into earnings in the period during which the hedged transaction is recognized. The reclassified amount is reported in the same financial statement line item as the hedged item. If the foreign currency forward contracts are terminated or can no longer qualify as hedging instruments prior to maturity, the fair value of the contracts recorded in accumulated other comprehensive loss may be recognized in the Consolidated Statement of Income based on an assessment of the contracts at the time of termination.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

5. Derivative Financial Instruments (Continued)

        The Company entered into foreign currency forward contracts in March 2018 for a portion of its forecasted operating expenses denominated in the Norwegian Krone. As of December 29, 2018, the contracts had maturities of one to twelve months and an aggregate notional value of $8.8 million. Losses expected to be reclassified into earnings in the next 12 months were not material. The fair value of the contracts, contract losses recognized in other comprehensive income and amounts reclassified from accumulated other comprehensive loss into earnings were not material for any of the periods presented.

Interest Rate Swaps

        The Company is exposed to interest rate fluctuations in the normal course of its business, including through its Credit Facilities. The interest payments on the facility are calculated using a variable-rate of interest. The Company has entered into an interest rate swap agreement with an original notional value of $72.5 million (equal toin connection with its Credit Facility in July 2016. The Company terminated the outstanding balance of the Credit Facilities at July 8, 2016) and, effectively, converted the Eurodollar portion of the variable-rate interest payments to fixed-rate interest payments through July 2020. The Company's previous swap agreement with a remaining notional valueon March 6, 2017, which resulted in the reclassification of $72.5$1.8 million was terminated on July 8, 2016.

        The Company estimates the fair values of interest rate swaps based on quoted prices and market observable data of similar instruments. If the Credit Facilities or the interest rate swap agreement is terminated prior to maturity, the fair value of the interest rate swapunrealized gains that were previously recorded in accumulated other comprehensive income (loss) may be recognized in the Consolidated Statement of Income based on an assessment of the agreements at the time of termination. The fair value of the interest rate swap terminated on July 8, 2016 was not material. The Company did not discontinue any other cash flow hedges in any of the periods presented.

        The Company measures the effectiveness of its cash flow hedge by comparing the change in fair value of the hedged variable interest payments with the change in fair value of the interest rate swap. The Company recognizes ineffective portions of the hedge, as well as amounts not included in the assessment of effectiveness, in the Consolidated Statement of Income. As of December 31, 2016, no portion of the gains or losses from the Company's hedging instrument was excluded from the assessment of effectiveness. Hedge ineffectiveness was not material for any of the periods presented.

        The Company's derivative financial instrument in cash flow hedging relationships consisted of the following (in thousands):

 
  
 Fair Value 
 
 Balance Sheet Location December 31,
2016
 January 2,
2016
 

Interest rate swap

 Other assets, net $1,808 $92 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

5. Derivative Financial Instruments (Continued)

        The before-tax effect of derivative instruments in cash flow hedging relationships was as follows (in thousands):

 
 Gain (Loss) Recognized in
OCI on Derivatives
(Effective Portion)
during the Year Ended
 Location
of Loss
Reclassified
into Income
 Loss Reclassified
from Accumulated
OCI into Income
(Effective Portion)
during the Year Ended
 
 
 December 31,
2016
 January 2,
2016
 January 3,
2015
  
 December 31,
2016
 January 2,
2016
 January 3,
2015
 

Interest rate swaps

 $1,466 $(728)$(799)Interest expense $(249)$(489)$(618)

        The Company expects to reclassify $0.1 million of its interest rate swap gains included in accumulated other comprehensive income (loss) as of December 31, 2016loss into earnings in the next 12 months, which would be offset by higher interest payments.during fiscal 2017.

Non-designated Hedges

Foreign Currency Forward Contracts

        The Company uses foreign currency forward contracts to manage exposurereduce the earnings impact that exchange rate fluctuations have on non-U.S. dollar balance sheet exposures. The Company recognizes gains and losses on the foreign currency forward contracts in interest income and other, net in the Consolidated Statement of Income in the same period as the remeasurement loss and gain of the related foreign currency denominated asset or liability. The Company does not apply hedge accounting to these foreign exchange risk.currency forward contracts.

        As of December 31, 2016 and January 2, 2016,30, 2017, the Company held one foreign currency forward contract denominated in the Norwegian Krone with a notional value of $3.9 million and $5.1 million, respectively.$2.4 million. The fair value of the contractscontract was not material as of December 31, 2016 and January 2, 2016. The contract held as of December 31, 2016 has a maturity date of March 29, 2017 and it was not designated as a hedging instrument.30, 2017.

        The before-tax effect of derivative instruments not designated as hedging instruments was as follows (in thousands):


 Year Ended  
 Year Ended  
Gain (Loss) Recognized in Income
 December 31,
2016
 January 2,
2016
 January 3,
2015
 Location December 29,
2018
 December 30,
2017
 December 31,
2016
 Location

Foreign currency forward contracts

 $(92)$935 $1,075 Other, net $105 $(207)$(92)Interest income and other, net

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

6. Balance Sheet Details

        The following tables show the details of selected Consolidated Balance Sheet items (in thousands):

Accounts Receivable, Net


 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

Accounts receivable

 $75,035 $74,272  $73,832 $72,005 

Allowance for doubtful accounts

 (634) (671) (638) (638)

 $74,401 $73,601  $73,194 $71,367 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December��31, 2016 (Continued)

6. Balance Sheet Details (Continued)

Inventories

 
 December 31,
2016
 January 2,
2016
 

Work in progress

 $40,755 $36,774 

Finished goods

  18,823  17,121 

 $59,578 $53,895 

Prepaid Expenses and Other Current Assets


 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

Distributor advances

 $40,205 $36,743 

Other

 21,600 15,915 

Work in progress

 $50,983 $46,698 

Finished goods

 23,989 26,434 

 $61,805 $52,658  $74,972 $73,132 

Property and Equipment


 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

Buildings and improvements

 $94,977 $94,607  $109,025 $96,196 

Equipment

 57,677 55,072  62,895 59,836 

Computers and purchased software

 35,492 29,663  42,487 37,598 

Leasehold interest in ground leases

 23,840 23,840  23,840 23,840 

Leasehold improvements

 12,006 10,483 

Furniture and fixtures

 5,484 4,777  7,794 5,691 

Leasehold improvements

 10,083 9,204 

 227,553 217,163  258,047 233,644 

Accumulated depreciation

 (97,994) (86,031) (118,998) (105,962)

 $129,559 $131,132  $139,049 $127,682 

Accrued ExpensesOther Current Liabilities


 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

Accrued compensation and benefits

 $28,781 $27,304  $37,113 $33,631 

Accrued price protection credits

 12,033 8,239 

Other

 21,319 24,827  32,034 31,489 

 $50,100 $52,131  $81,180 $73,359 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

6. Balance Sheet Details (Continued)

Other Non-current Liabilities


 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

Software license accruals

 $14,436 $1,107 

Deferred tax liabilities

 13,119 13,741 

Non-current tax liabilities

 $21,576 $39,196 

Other

 15,136 25,680  35,872 38,666 

 $42,691 $40,528  $57,448 $77,862 

7. Risks and Uncertainties

Financial Instruments

        Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash equivalents, investments, accounts receivable, notes receivable and derivatives. The Company places its cash equivalents and investments primarily in municipal bonds, money market funds, corporate bonds, variable-rate demand notes, U.S. government bonds,securities, agency securities, asset-back securities, certificates of deposit, commercial paper, auction-rate securities and international government bonds. Concentrations of credit risk with respect to accounts receivable are primarily due to customers with large outstanding balances. The Company's customers that accounted for greater than 10% of accounts receivable consisted of the following:

 
 December 29,
2018
 December 30,
2017
 

Arrow Electronics

  12% 14%

Edom Technology

  10% * 

Avnet

    16%

 
 December 31,
2016
 January 2,
2016
 

Edom Technology

  19% 17%

Arrow Electronics

  13% 17%

Avnet

  12% 14%
*
Less than 10% of accounts receivable

        The Company performs periodic credit evaluations of its customers' financial condition and generally requires no collateral from its customers. The Company provides an allowance for potential credit losses based upon the expected collectibility of such receivables. Losses have not been significant for any of the periods presented.

        The Company holds twothree notes receivable for $1.5 million and $0.7 million from atwo privately held company.companies. The notes have a maturity datetotal carrying value of the earliernotes was $2.4 million as of December 31,29, 2018, or certain liquidity events and werewhich was recorded in other assets, net in the Consolidated Balance Sheet.

        The Company holds antwo equity investmentinvestments in another privately held company withcompanies. One investment is accounted for using the equity method and had a carrying value of $2.8$4.1 million as of December 31, 2016.29, 2018. The second investment is accounted for underrecorded at cost minus impairment and had a carrying value of $2.0 million as of December 29, 2018. In fiscal 2018, the cost methodCompany reduced the carrying value of the second investment by $1.8 million, which was recorded in interest income and wasother, net in the Consolidated Statements of Income. Both investments were recorded in other assets, net in the Consolidated Balance Sheet.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

7. Risks and Uncertainties (Continued)

        As a result of its use of derivative instruments, the Company is exposed to the risk that its counterparties will fail to meet their contractual obligations. To mitigate this counterparty credit risk, the Company has a policy to enter into contracts with only selected major financial institutions. The Company periodically reviews and re-assesses the creditworthiness of such counterparties based on a variety of factors.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

7. Risks and Uncertainties (Continued)

Distributor Advances

        On sales to distributors, the Company's payment terms often require the distributor to initially pay amounts owed to the Company for an amount in excess of their ultimate cost. The Company's sales price to its distributors may be higher than the amount that the distributors will ultimately owe the Company because distributors often negotiate price reductions after purchasing the product from the Company and such reductions are often significant. These negotiated price discounts are not granted until the distributor sells the product to the end customer, which may occur after the distributor has paid the original invoice amount to the Company. Payment of invoices prior to receiving an associated discount can have an adverse impact on the working capital of the Company's distributors. Accordingly, the Company has entered into agreements with certain distributors whereby it advances cash to the distributors to reduce the distributor's working capital requirements. The advance amounts are based on the distributor's inventory balance, and are adjusted quarterly. Such amounts are recorded in prepaid expenses and other current assets in the Consolidated Balance Sheet. The terms of these advances are set forth in binding legal agreements and are unsecured, bear no interest on unsettled balances and are due upon demand. The agreements governing these advances can be cancelled by the Company at any time.

Suppliers

        A significant portion of the Company's products are fabricated by Taiwan Semiconductor Manufacturing Co. (TSMC) or TSMC's affiliates and Semiconductor Manufacturing International Corporation (SMIC). The inability of TSMC or SMIC to deliver wafers to the Company on a timely basis could impact the production of the Company's products for a substantial period of time, which could have a material adverse effect on the Company's business, financial condition, and results of operations.operations and cash flows.

Customers

        The Company sells directly to end customers, distributors and contract manufacturers. Although the Company actually sells the products to, and is paid by, distributors and contract manufacturers, the Company refers to the end customer as its customer. None of the Company's end customers or


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

7. Risks and Uncertainties (Continued)

contract manufacturers accounted for greater than 10% of revenue during fiscal 2016, 20152018, 2017 or 2014.2016. The Company's end customers and distributors that accounted for greater than 10% of revenue consisted of the following:


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

End Customers

       

Samsung*

 ** ** 12%

Distributors

 
 
 
 
 
 
 

Arrow Electronics

 21% 12% 11%

Edom Technology

 17% 20% 20% 17% 19% 17%

Avnet

 13% 12% 12% * 14% 13%

Arrow Electronics

 11% ** ** 

*
Samsung's purchases were across a variety of product areas.

**
Less than 10% of revenue

8. Acquisitions

Z-Wave

        On April 18, 2018, the Company completed the acquisition of the Z-Wave business from Sigma Designs, Inc. for $243 million in cash. Z-Wave is an Internet of Things (IoT) technology for smart home solutions.

        This strategic acquisition expands the Company's IoT connectivity portfolio in the connected home market, while further scaling the Company's engineering team. These factors contributed to a purchase price that was in excess of the fair value of the net assets acquired and, as a result, the Company recorded goodwill. A portion of the goodwill is deductible for tax purposes. The purchase price was allocated as follows (in thousands):

 
 Amount Weighted-Average
Amortization Period
(Years)

Intangible assets:

     

In-process research and development

 $20,900 Not amortized

Developed technology

  69,875 7

Customer relationships

  25,000 4

Trademarks

  9,900 7

  125,675  

Cash and cash equivalents

  2,841  

Accounts receivable

  5,311  

Inventory

  15,581  

Other current assets

  329  

Goodwill

  109,117  

Other non-current assets

  2,587  

Accounts payable

  (3,306) 

Other current liabilities

  (8,918) 

Other non-current liabilities

  (6,648) 

Total purchase price

 $242,569  

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

8. Acquisitions (Continued)

        In-process research and development (IPR&D) represents acquired smart home technology that had not been completed as of the acquisition date. The fair value of IPR&D was determined using the income approach. The discount rate applied to the projected cash flows was 15.0%, which reflects the engineering and technical risks related to the projects. The allocation of the purchase price is preliminary and subject to change, based on the finalization of income tax matters.

        Revenues attributable to the Z-Wave business from the date of acquisition to December 29, 2018 were $37.0 million. The Company recorded approximately $4.9 million of acquisition-related costs in selling, general and administrative expenses during fiscal 2018.

        The following unaudited pro forma financial information presents combined results of operations for each of the periods presented, giving effect to the acquisition as if it had been completed on January 1, 2017. The pro forma financial information includes charges for the fair value write-up associated with acquired inventory, adjustments for amortization expense of acquired intangible assets and tax-related expenses. The pro forma results of operations are presented for informational purposes only and are not necessarily indicative of the results of operations that would have been achieved if the acquisition had taken place on January 1, 2017 or of results that may occur in the future (in thousands, except per share data):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017
 
 
 (Unaudited)
 

Revenues

 $882,109 $824,009 

Net income

 $87,874 $27,958 

Earnings per share:

  
 
  
 
 

Basic

 $2.04 $0.66 

Diluted

 $2.00 $0.65 

Zentri

        On January 20, 2017, the Company acquired Zentri, Inc., a private company. Zentri is an innovator in low-power, cloud-connected Wi-Fi technologies for the IoT. The Company acquired Zentri for approximately $18.1 million, including initial cash consideration of approximately $14.3 million, and potential additional consideration with an estimated fair value of approximately $3.8 million at the date of acquisition.

        The purchase price was allocated as follows: intangible assets—$6.7 million; goodwill—$12.1 million; and other net liabilities—$0.7 million. The goodwill is not deductible for tax purposes. Pro forma information related to this acquisition has not been presented because it would not be materially different from amounts reported.

Micrium

        On October 3, 2016, the Company acquired Micrium, a private company. Micrium is a supplier of real-time operating system (RTOS) software for the IoT. The Company acquired Micrium for approximately $12.4 million, consisting of approximately $8.2 million in cash and $4.2 million in stock consideration. An additional approximately $1.0 million in stock consideration was accounted for as a transaction separate from the business combination based on its economic substance and will be recorded as post-combination compensation expense over four years. Approximately $1.5 million


Table of the consideration was held in escrow as security for breaches of warranties and certain other expressly enumerated matters.Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

8. Acquisitions (Continued)

        The purchase price was allocated as follows: intangible assets—$9.5 million; goodwill—$3.4 million; and other net assets—liabilities—$(0.5)0.5 million. A portion of the goodwill is deductible for tax purposes. The allocation of the purchase price is preliminary and subject to change, primarily for the valuation of certain assets and accruals and the finalization of income tax matters. Accordingly, adjustments may be made to the values of the assets acquired and liabilities assumed as additional information is obtained about the facts and circumstances that existed at the valuation date.

Pro forma information related to this acquisition has not been presented because it would not be materially different from amounts reported. The Company recorded approximately $0.3 million of acquisition-related costs in selling, general and administrative expenses during fiscal 2016.

Telegesis

        On November 20, 2015, the Company acquired Telegesis (UK) Limited, a limited liability company incorporated in England and Wales. Telegesis is a supplier of wireless mesh networking modules based on the Company's zigbee and Thread technology, targeting applications in the smart energy, home automation and industrial automation markets. The Company acquired Telegesis for cash consideration of $19.9 million. Approximately $2.9 million of the consideration was held in escrow as security for breaches of warranties and certain other expressly enumerated matters.

        The Company believes that this strategic acquisition accelerates its roadmap for zigbee and Thread modules. This factor contributed to a purchase price that was in excess of the fair value of the net


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

8. Acquisitions (Continued)

assets acquired and, as a result, the Company recorded goodwill. The goodwill is not deductible for tax purposes. The purchase price was allocated as follows (in thousands):

 
 Amount Weighted-Average
Amortization Period
(Years)

Intangible assets:

     

In-process research and development

 $10 Not amortized

Developed technology

  4,980 7

Customer relationships

  2,000 3

Trademarks

  400 3

  7,390  

Cash and cash equivalents

  717  

Other current assets

  4,545  

Goodwill

  9,344  

Other non-current assets

  131  

Current liabilities

  (689) 

Non-current deferred tax liabilities

  (1,508) 

Total purchase price

 $19,930  

        Pro forma information related to this acquisition has not been presented because it would not be materially different from amounts reported. The Company recorded approximately $0.5 million of acquisition-related costs in selling, general and administrative expenses during fiscal 2015.

Bluegiga

        On January 30, 2015, the Company acquired Bluegiga Technologies Oy, a private company based in Finland. Bluegiga is a provider of Bluetooth Smart, Bluetooth Classic and Wi-Fi modules and software stacks for a multitude of applications in the IoT, industrial automation, consumer electronics, automotive, retail, residential, and health and fitness markets. The Company acquired Bluegiga for cash consideration of approximately $58.0 million.

        The Company believes that this strategic acquisition will accelerate its entry into the wireless module market. This factor contributed to a purchase price that was in excess of the fair value of the


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

8. Acquisitions (Continued)

net assets acquired and, as a result, the Company recorded goodwill. The goodwill is not deductible for tax purposes. The purchase price was allocated as follows (in thousands):

 
 Amount Weighted-Average
Amortization Period
(Years)

Intangible assets:

     

In-process research and development

 $5,710 Not amortized

Developed technology

  12,190 8

Customer relationships

  6,670 4

Trademarks

  880 3

  25,450  

Cash and cash equivalents

  1,132  

Other current assets

  6,156  

Goodwill

  34,597  

Other non-current assets

  208  

Current liabilities

  (3,289) 

Non-current deferred tax liabilities

  (3,780) 

Long-term debt

  (2,232) 

Other non-current liabilities

  (220) 

Total purchase price

 $58,022  

        In-process research and development (IPR&D) represents acquired technology that had not achieved technological feasibility as of the acquisition date and had no alternative future use. The IPR&D recorded in connection with the acquisition of Bluegiga consisted primarily of Bluetooth Smart Ready and Bluetooth Smart modules and software stacks. The fair value of these technologies was determined using the income approach. The discount rate applicable to the cash flows was 16.1%.

        Pro forma information related to this acquisition has not been presented because it would not be materially different from amounts reported. The Company recorded approximately $1.2 million of acquisition-related costs in selling, general and administrative expenses during fiscal 2015.

Energy Micro

        On July 1, 2013, the Company acquired Energy Micro. In the first quarter of 2015, the Company made the following payments in connection with the Energy Micro acquisition: (a) approximately $20.0 million was paid for the release of the holdback; and (b) approximately $6.3 million was paid for the first annual period of the earn-out. Approximately $1.8 million of the earn-out payment was recorded as compensation expense during fiscal 2014. The remaining approximately $4.5 million of the earn-out payment represented additional consideration.

        On March 11, 2016, the Company entered into an agreement with Energy AS, the former parent of Energy Micro. The agreementwhich settled the amount of the earn-out to be paid for fiscal 2015 through 2018. The total settlement amount was approximately $16.0 million (in lieu of potential payments of up to $26.7 million) and was paid on May 11, 2016. The settlement amount represented approximately $11.4 million of additional consideration and approximately $4.6 million of compensation expense (of


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

8. Acquisitions (Continued)

which approximately $2.7 million was recorded in fiscal 2016 and approximately $1.9 million was recorded in fiscal 2015). The compensation expense recorded in fiscal 2016 was offset in part by a gain of approximately $2.7 million to adjust the consideration portion of the earn-out to fair value due to the settlement.

9. Goodwill and Other Intangible Assets

Goodwill

        The following summarizes the activity in goodwill for the years ended December 31, 201629, 2018 and January 2, 2016December 30, 2017 (in thousands):


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

Beginning balance

 $272,722 $228,781  $288,227 $276,130 

Additions due to business combinations

 3,408 43,941  109,117 12,097 

Ending balance

 $276,130 $272,722  $397,344 $288,227 

Other Intangible Assets

        The gross carrying amount and accumulated amortization of other intangible assets are as follows (in thousands):


  
 December 31, 2016 January 2, 2016   
 December 29, 2018 December 30, 2017 

 Weighted-Average
Amortization
Period
(Years)
  Weighted-Average
Amortization
Period
(Years)
 

 Gross
Amount
 Accumulated
Amortization
 Gross
Amount
 Accumulated
Amortization
  Gross
Amount
 Accumulated
Amortization
 Gross
Amount
 Accumulated
Amortization
 

Intangible assets:

           

Subject to amortization:

           

Core and developed technology

 9 $157,321 $(70,181)$170,541 $(70,135) 8 $237,265 $(102,116)$161,700 $(89,442)

Customer relationships

 7 24,970 (11,356) 23,170 (7,259) 5 46,890 (21,075) 25,470 (16,180)

Patents

 6 3,000 (2,250) 3,022 (1,763)    3,000 (2,750)

Trademarks

 7 3,690 (1,629) 3,490 (952) 7 12,310 (2,442) 3,690 (2,344)

 9 188,981 (85,416) 200,223 (80,109)

Not subject to amortization:

 

 

 
 
 
 
 
 
 
 
 

In-process research and development

 Not amortized   1,240  

Total intangible assets

   $188,981 $(85,416)$201,463 $(80,109)

Total

 8 $296,465 $(125,633)$193,860 $(110,716)

        Gross intangible assets decreased $12.5increased $125.7 million in fiscal 2016 due to the removal of $22.0 million of fully amortized assets. This decrease was offset by $9.5 million in2018 for assets added due to the acquisition of Micrium.Z-Wave business. This increase was offset by $23.1 million due to the removal of fully amortized assets.

        Amortization expense related to intangible assets for fiscal 2018, 2017 and 2016 was $38.0 million, $27.1 million and $27.3 million, respectively. The estimated aggregate amortization expense for


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

9. Goodwill and Other Intangible Assets (Continued)

        Amortization expense related to intangible assets for fiscal 2016, 2015 and 2014 was $27.3 million, $26.5 million and $17.9 million, respectively. The estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years is as follows (in thousands):

Fiscal Year
  
   
 

2017

 $24,957 

2018

 22,890 

2019

 17,192  $39,222 

2020

 14,697  36,727 

2021

 10,308  32,337 

2022

 24,206 

2023

 18,286 

10. Debt

1.375% Convertible Senior Notes

        On July 31, 2012,March 6, 2017, the Company completed a private offering of $400 million principal amount convertible senior notes (the "Notes"). The Notes bear interest semi-annually at a rate of 1.375% per year and will mature on March 1, 2022, unless repurchased, redeemed or converted at an earlier date. The Company used $72.5 million of the proceeds to pay off the then remaining balance under its credit agreement.

        The Notes are convertible at an initial conversion rate of 10.7744 shares of common stock per $1,000 principal amount of the Notes, or approximately 4.3 million shares of common stock, which is equivalent to a conversion price of approximately $92.81 per share. The conversion rate is subject to adjustment under certain circumstances. Holders may convert the Notes under the following circumstances: during any calendar quarter after the calendar quarter ended on June 30, 2017 if the closing price of the Company's common stock for at least 20 trading days in the 30 consecutive trading days ending on the last trading day of the preceding calendar quarter is greater than or equal to 130% of the conversion price of the Notes; during the five business day period after any ten consecutive trading day period (the "measurement period") in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the closing sale price of our common stock and the conversion rate on each such trading day; if specified distributions or corporate events occur; if the Notes are called for redemption; or at any time after December 1, 2021. The Company may redeem all or any portion of the Notes, at its option, on or after March 6, 2020, if the last reported sale price of the Company's common stock has been at least 130% of the conversion price then in effect for at least 20 trading days during any 30 consecutive trading day period. Upon conversion, the Notes may be settled in cash, shares of the Company's common stock or a combination of cash and shares, at the Company's election.

        The principal balance of the Notes was separated into liability and equity components, and was recorded initially at fair value. The excess of the principal amount of the liability component over its carrying amount represents the debt discount, which is amortized to interest expense over the term of the Notes using the effective interest method. The carrying amount of the liability component was estimated by discounting the contractual cash flows of similar non-convertible debt at an appropriate market rate at the date of issuance.

        The Company incurred debt issuance costs of approximately $10.6 million, which was allocated to the liability and equity components in proportion to the allocation of the proceeds. The costs allocated


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

10. Debt (Continued)

to the liability component are being amortized as interest expense over the term of the Notes using the effective interest method.

        The carrying amount of the Notes consisted of the following (in thousands):

 
 December 29,
2018
 December 30,
2017
 

Liability component

       

Principal

 $400,000 $400,000 

Unamortized debt discount

  (39,298) (50,499)

Unamortized debt issuance costs

  (5,931) (7,622)

Net carrying amount

 $354,771 $341,879 

Equity component

       

Net carrying amount

 $57,735 $57,735 

        The liability component of the Notes is recorded in convertible debt on the Consolidated Balance Sheet. The equity component of the Notes is recorded in additional paid-in capital. The effective interest rate for the liability component was 4.75%. As of December 29, 2018, the remaining period over which the debt discount and debt issuance costs will be amortized was 3.2 years.

        Interest expense related to the Notes was comprised of the following (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017
 

Contractual interest expense

 $5,500 $4,492 

Amortization of debt discount

  11,202  8,816 

Amortization of debt issuance costs

  1,690  1,330 

 $18,392 $14,638 

Credit Facility

        In connection with the Company's offering of the Notes, it and certain of its domestic subsidiaries (the "Guarantors") entered into a $230 million five-year Credit Agreement (the "Credit Agreement"), which consisted of a $100 million Term Loan Facility and a $130 million Revolving Credit Facility (collectively, the "Credit Facilities"). On July 24, 2015, the Company and the Guarantors amended the Credit Agreement (the "Amended Credit Agreement") in order to, among other things, increase the borrowing capacity under the Revolving Credit Facility to $300 million, eliminate the Term Loan Facility and extend the maturity date to five years from the closing date. On July 24, 2015, the Company borrowed $82.5 million under the Amended Credit Agreementits existing credit agreement and paid off the then remaining balance of its Term Loan Facility.

$72.5 million. The Amendedamended agreement (the "Credit Facility") consists of a $300 million revolving credit facility with a maturity date of July 24, 2020. The Credit AgreementFacility includes a $25 million letter of credit sublimit and a $10 million swingline loan sublimit. The Company also has an option to increase the size of the borrowing capacity by up to an aggregate of $200 million in additional commitments, subject to certain conditions.

        The Revolving Credit Facility,revolving credit facility, other than swingline loans, will bear interest at the Eurodollar rate plus an applicable margin or, at the option of the Company, a base rate (defined as the highest of the Wells Fargo prime rate, the Federal Funds rate plus 0.50% and the Eurodollar Base Rate plus 1.00%) plus an applicable margin. Swingline loans accrue interest at the base rate plus the applicable margin for base rate loans. The applicable margins for the Eurodollar rate loans range from 1.25% to 2.00%


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

10. Debt (Continued)

and for base rate loans range from 0.25% to 1.00%, depending in each case, on the leverage ratio as defined in the Agreement.Credit Facility.

        The Amended Credit AgreementFacility contains various conditions, covenants and representations with which the Company must be in compliance in order to borrow funds and to avoid an event of default, including financial covenants that the Company must maintain a leverage ratio (funded debt/EBITDA) of no more than 3.00 to 1 and a minimum fixed charge coverage ratio (EBITDA/interest payments, income taxes and capital expenditures) of no less than 1.25 to 1. As of December 31, 2016,29, 2018, the Company was in compliance with all covenants of the Amended Credit Agreement.Facility. The Company's obligations under the Amended Credit AgreementFacility are guaranteed by the Guarantors and are secured by a security interest in substantially all assets of the Company and the Guarantors.

11. Commitments and Contingencies

Operating Leases

        The Company leases certain facilities under operating lease agreements that expire at various dates through 2027. Some of these arrangements contain renewal options and require the Company to pay taxes, insurance and maintenance costs.

        Rent expense under operating leases was $6.0 million, $5.5 million and $4.7 million for fiscal 2018, 2017 and 2016, respectively. The minimum annual future rentals under the terms of these leases as of December 29, 2018 are as follows (in thousands):

Fiscal Year
  
 

2019

 $5,287 

2020

  4,746 

2021

  4,051 

2022

  3,485 

2023

  2,810 

Thereafter

  3,842 

Total minimum lease payments

 $24,221 

Investment Commitment

        The Company has committed to invest up to $10.0 million in a limited partnership, of which approximately $4.3 million was funded through December 29, 2018.

Patent Litigation—Cresta Technology

        On January 28, 2014, Cresta Technology Corporation ("Cresta Technology"), a Delaware corporation, filed a lawsuit against the Company in the United States District Court in the District of Delaware, alleging infringement of three United States Patents (the "Cresta Patents"). On July 16, 2014, the Company filed a lawsuit against Cresta Technology in the United States District Court in the Northern District of California alleging infringement of six United States Patents.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

10. Debt11. Commitments and Contingencies (Continued)

        Cresta Technology declared bankruptcy in 2016 and the Cresta patents and the Delaware lawsuit were acquired by Crespe LLC.

        On September 17, 2018, the Company and Crespe LLC settled all matters. The Company received a non-material payment from Crespe LLC. There was no payment from the Company and the Company received a full license to the Cresta Patents and dismissal of all claims.

Interest Rate Swap AgreementPatent Litigation—Bandspeed

        In connection with        On June 21, 2018, Bandspeed, LLC ("Bandspeed"), a Texas limited liability company, filed a lawsuit against the outstanding balanceCompany in the United States District Court of the Credit Facilities at July 8, 2016,Western District of Texas, Austin Division, alleging infringement of eight United States Patents. On November 9, 2018, the Company entered into an interest rate swap agreement asand Bandspeed settled all matters, and the Court ordered a hedge againstdismissal on November 19, 2018. The Company made a non-material payment to Bandspeed and received a full license to the Eurodollar portionalleged patents and dismissal of such variable interest payments. Underall claims.

Other

        The Company is involved in various other legal proceedings that have arisen in the termsnormal course of business. While the swap agreement,ultimate results cannot be predicted with certainty, the Company effectively converted the Eurodollar portion of the interestdoes not expect them to have a material adverse effect on the Credit Facilities to a fixed interest rate of 0.875% through July 2020. As of December 31, 2016, the combined interest rate of the Credit Facilities (which includes an applicable margin) and the interest rate swap was 2.375%. See Note 5,Derivativeits Consolidated Financial Instruments, for additional information.Statements.

11.12. Stockholders' Equity

Common Stock

        The Company issued 1.10.8 million shares of common stock during fiscal 2016, including approximately 0.1 million shares in connection with the acquisition of Micrium.2018.

Share Repurchase Programs

        The Board of Directors authorized the following share repurchase programs (in thousands):

Program Authorization Date
 Program
Termination
Date
 Program
Amount
 

October 2017

 December 2019 $200,000*

January 2017

 December 2017 $100,000 

August 2015

 December 2016 $100,000 

Program Authorization Date
 Program
Termination
Date
 Program
Amount
 

January 2017

 December 2017 $100,000 

August 2015

 December 2016 $100,000 

October 2014

 December 2015 $100,000 

January 2014

 January 2015 $100,000 
*
In October 2018, the Board of Directors increased the share repurchase amount for the October 2017 program from $100 million to $200 million and extended the termination date from December 2018 to December 2019.

        These programs allow for repurchases to be made in the open market or in private transactions, including structured or accelerated transactions, subject to applicable legal requirements and market conditions. The Company repurchased 0.9 million shares, 1.7 million shares and 1.70.4 million shares of its common stock for $40.5$39.3 million $71.4 million and $71.7 million and during fiscal 2016, 2015 and 2014, respectively. These2018. The Company did not repurchase any shares were retired upon repurchase.of its common stock during fiscal 2017. The


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

11.12. Stockholders' Equity (Continued)

Accumulated Other Comprehensive Income (Loss)

        The componentsCompany repurchased 0.9 million shares of accumulated other comprehensive income (loss), net of taxes,its common stock for $40.5 million during fiscal 2016. These shares were as follows (in thousands):retired upon repurchase.

 
 Unrealized Gain
on Cash Flow
Hedge
 Net Unrealized
Losses on
Available-
For-Sale Securities
 Total 

Balance at December 28, 2013

 $333 $(1,017)$(684)

Other comprehensive income (loss) before reclassifications

  
(520

)
 
720
  
200
 

Amount reclassified from accumulated other comprehensive income (loss)

  402    402 

Net change for the period

  (118) 720  602 

Balance at January 3, 2015

  
215
  
(297

)
 
(82

)

Other comprehensive income (loss) before reclassifications

  
(473

)
 
(276

)
 
(749

)

Amount reclassified from accumulated other comprehensive income (loss)

  318  6  324 

Net change for the period

  (155) (270) (425)

Balance at January 2, 2016

  
60
  
(567

)
 
(507

)

Other comprehensive income (loss) before reclassifications

  
953
  
(116

)
 
837
 

Amount reclassified from accumulated other comprehensive income (loss)

  162    162 

Net change for the period

  1,115  (116) 999 

Balance at December 31, 2016

 
$

1,175
 
$

(683

)

$

492
 

Reclassifications From Accumulated Other Comprehensive Income (Loss)Loss

        The following table summarizes the effect on net income from reclassifications out of accumulated other comprehensive income (loss)loss (in thousands):


 Year ended  Year ended 
Reclassification
 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Losses on cash flow hedges to:

       

Losses on available-for-sales securities to:

       

Interest income and other, net

 $(49)$ $ 

Gains (losses) on cash flow hedges to:

 
 
 
 
 
 
 

Interest income and other, net

 (316)   

Interest expense

 $(249)$(489)$(618)  1,808 (249)

Gains (losses) on available-for-sales securities to:

 
 
 
 
 
 
 

Interest income

  (10)  

 (249) (499) (618) (365) 1,808 (249)

Income tax benefit

 
87
 
175
 
216
 

Income tax (expense) benefit

 
77
 
(633

)
 
87
 

Total reclassifications

 $(162)$(324)$(402)

Total gains (losses) reclassified

 $(288)$1,175 $(162)

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

11. Stockholders' Equity (Continued)

Income Tax Allocated to the Components of Other Comprehensive Income (Loss)

        The income tax effects of the components of other comprehensive income (loss) were as follows (in thousands):


 Year ended  Year ended 
Income tax (expense) benefit on:
 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Net changes to available-for-sale securities:

               

Unrealized gains (losses) arising during the period

 $63 $149 $(387) $(79)$255 $63 

Reclassification for losses included in net income

  (4)    (10)   

Net changes to cash flow hedges:

 
 
 
 
 
 
   
 
 
 
 
 
 

Unrealized gains (losses) arising during the period

 (513) 255 279   200  (513)

Reclassification for losses included in net income

 (87) (171) (216)

Reclassification for gains (losses) included in net income

  (66) 633 (87)

 $(537)$229 $(324) $45 $888 $(537)

12.Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

13. Revenues

        The Company groups its revenues into four categories, based on the markets and applications in which its products may be used. The following disaggregates the Company's revenue by product category (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017 (1)
 December 31,
2016 (1)
 

Internet of Things

 $463,838 $395,012 $314,614 

Infrastructure

  199,478  152,158  147,677 

Broadcast

  141,412  152,980  157,746 

Access

  63,539  68,717  77,589 

 $868,267 $768,867 $697,626 

(1)
Under the modified retrospective method, prior period amounts have not been adjusted.

        A portion of the Company's sales are made to distributors under agreements allowing certain rights of return and/or price protection related to the final selling price to the end customers. These factors impact the timing and uncertainty of revenues and cash flows. The Company recognized revenue of $24.3 million during fiscal 2018 from performance obligations that were satisfied in previous reporting periods. The following disaggregates the Company's revenue by sales channel (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017 (1)
 December 31,
2016 (1)
 

Distributors

 $618,989 $547,419 $471,622 

Direct customers

  249,278  221,448  226,004 

 $868,267 $768,867 $697,626 

(1)
Under the modified retrospective method, prior period amounts have not been adjusted.

14. Stock-Based Compensation

        In fiscal 2009, the stockholders of the Company approved the 2009 Stock Incentive Plan (the "2009 Plan") and the 2009 Employee Stock Purchase Plan (the "2009 Purchase Plan"). In fiscal 2014,2017, the stockholders of the Company approved amendments to both the 2009 Plan and the 2009 Purchase Plan. TheThese amendments authorized additional shares of common stock for issuance, to comply with changes in applicable law, improve the Company's corporate governance and to implement other best practices. The amended plans are currently effective.

2009 Stock Incentive Plan

        Under the 2009 Plan, the following may be granted: stock options, stock appreciation rights, performance shares, performance stock units, restricted stock units (RSUs), restricted stock awards (RSAs), performance-based awards and other awards (collectively, all such grants are referred to as "awards"). The amendment of the shares of common stock reserved for issuance infiscal 2017 amendments to the 2009 Plan created twoa single share pools—Prior Pool and New Pool. Awards of stock options and stock appreciation rights eachpool. All awards now deduct one share from the 2009 Plan shares available for issuance for each share granted, and full value awards (awards other than for which the participant is requiredgranted. Awards


Table of Contents


Silicon Laboratories Inc.
Notes to pay at least the fair market value of the underlying shares on the date of grant) deduct 1.55 shares from the 2009 Plan shares available for issuance for each share granted under the Prior Pool. Awards of stock options, stock appreciation rights, and full value awards each deduct one share from the 2009 Plan shares available for issuance for each share granted under the New Pool. Awards Consolidated Financial Statements
December 29, 2018 (Continued)

14. Stock-Based Compensation (Continued)

granted under the 2009 Plan generally contain vesting provisions ranging from three to four years. The exercise price of stock options offered under the 2009 Plan may not be less than 100% of the fair market value of a share of our common stock on the date of grant. To the extent awards granted under the 2009 Plan terminate, expire or lapse for any reason, or are settled in cash, shares subject to such awards will again be available for grant.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

12. Stock-Based Compensation (Continued)

2000 Stock Incentive Plan

        In fiscal 2000, the Company's Board of Directors and stockholders approved the 2000 Plan. The 2000 Plan contains programs for (i) the discretionary granting of stock options to employees, non-employee board members and consultants for the purchase of shares of the Company's common stock, (ii) the discretionary issuance of common stock directly (as granted under direct issuance shares in RSAs and RSUs), (iii) the granting of special below-market stock options to executive officers and other highly compensated employees of the Company for which the exercise price can be paid using payroll deductions and (iv) the automatic issuance of stock options to non-employee board members. The discretionary issuance of common stock, RSUs and stock options generally contain vesting provisions ranging from three to eight years. If permitted by the Company, stock options can be exercised immediately and, similar to the direct issuance shares, are subject to repurchase rights which generally lapse in accordance with the vesting schedule. The repurchase rights provide that upon certain defined events, the Company can repurchase unvested shares at the price paid per share. The term of each stock option is no more than ten years from the date of grant.

Stock Grants and ModificationsOperating Leases

        The Company grantedleases certain facilities under operating lease agreements that expire at various dates through 2027. Some of these arrangements contain renewal options and require the Company to its employees 1.3pay taxes, insurance and maintenance costs.

        Rent expense under operating leases was $6.0 million, 0.9$5.5 million and 0.8$4.7 million sharesfor fiscal 2018, 2017 and 2016, respectively. The minimum annual future rentals under the terms of full value awards and 0.2 million, 0.0 million, and 0.0 million stock options from the 2009 Plan during fiscal 2016, 2015 and 2014, respectively.these leases as of December 29, 2018 are as follows (in thousands):

Fiscal Year
  
 

2019

 $5,287 

2020

  4,746 

2021

  4,051 

2022

  3,485 

2023

  2,810 

Thereafter

  3,842 

Total minimum lease payments

 $24,221 

Investment Commitment

        The Company recorded $0.9 million and $2.3has committed to invest up to $10.0 million in selling, general and administrative expense during fiscal 2016 and 2015, respectively, in connection witha limited partnership, of which approximately $4.3 million was funded through December 29, 2018.

Patent Litigation—Cresta Technology

        On January 28, 2014, Cresta Technology Corporation ("Cresta Technology"), a Delaware corporation, filed a lawsuit against the modifications of certain equity awards. The modifications were pursuant to three employee terminations in fiscal 2016 and two employee terminations in fiscal 2015. There were no other significant modifications made to any stock grants during fiscal 2016, 2015 or 2014.

        IncludedCompany in the full value awards granted underUnited States District Court in the 2009 Plan in fiscal 2016, 2015 andDistrict of Delaware, alleging infringement of three United States Patents (the "Cresta Patents"). On July 16, 2014, were a total of 65 thousand, 89 thousand and 76 thousand market-based stock awards, respectively. The awards, also known as MSUs, provide the rights to acquire a number of shares of common stock for no cash consideration based upon achievement of specified levels of market conditions. The requisite service period for these MSUs is also the vesting period, which is generally three years. The performance criteria of the MSUs measure the difference between the total stockholders' return of the Company filed a lawsuit against that of the Philadelphia Semiconductor Sector Total Return Index.

        Also includedCresta Technology in the full value awards granted underUnited States District Court in the 2009 Plan during fiscal 2016 were 65 thousand performance-based stock awards. The awards, also known as PSUs, provide for the rights to acquire a numberNorthern District of sharesCalifornia alleging infringement of common stock for no cash consideration based upon the achievement of specified revenue objectives during the year. The requisite service period for these PSUs is approximately three years from the date of grant.

2009 Employee Stock Purchase Plan

        The rights to purchase common stock granted under the 2009 Purchase Plan are intended to be treated as either (i) purchase rights granted under an "employee stock purchase plan," as that term is defined in Section 423(b) of the Internal Revenue Code (the "423(b) Plan"), or (ii) purchase rightssix United States Patents.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31,29, 2018 (Continued)

11. Commitments and Contingencies (Continued)

        Cresta Technology declared bankruptcy in 2016 and the Cresta patents and the Delaware lawsuit were acquired by Crespe LLC.

        On September 17, 2018, the Company and Crespe LLC settled all matters. The Company received a non-material payment from Crespe LLC. There was no payment from the Company and the Company received a full license to the Cresta Patents and dismissal of all claims.

Patent Litigation—Bandspeed

        On June 21, 2018, Bandspeed, LLC ("Bandspeed"), a Texas limited liability company, filed a lawsuit against the Company in the United States District Court of the Western District of Texas, Austin Division, alleging infringement of eight United States Patents. On November 9, 2018, the Company and Bandspeed settled all matters, and the Court ordered a dismissal on November 19, 2018. The Company made a non-material payment to Bandspeed and received a full license to the alleged patents and dismissal of all claims.

Other

        The Company is involved in various other legal proceedings that have arisen in the normal course of business. While the ultimate results cannot be predicted with certainty, the Company does not expect them to have a material adverse effect on its Consolidated Financial Statements.

12. Stockholders' Equity

Common Stock

        The Company issued 0.8 million shares of common stock during fiscal 2018.

Share Repurchase Programs

        The Board of Directors authorized the following share repurchase programs (in thousands):

Program Authorization Date
 Program
Termination
Date
 Program
Amount
 

October 2017

 December 2019 $200,000*

January 2017

 December 2017 $100,000 

August 2015

 December 2016 $100,000 

*
In October 2018, the Board of Directors increased the share repurchase amount for the October 2017 program from $100 million to $200 million and extended the termination date from December 2018 to December 2019.

        These programs allow for repurchases to be made in the open market or in private transactions, including structured or accelerated transactions, subject to applicable legal requirements and market conditions. The Company repurchased 0.4 million shares of its common stock for $39.3 million during fiscal 2018. The Company did not repurchase any shares of its common stock during fiscal 2017. The


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

12. Stock-Based CompensationStockholders' Equity (Continued)

granted under an employeeCompany repurchased 0.9 million shares of its common stock purchase plan that is not subjectfor $40.5 million during fiscal 2016. These shares were retired upon repurchase.

Reclassifications From Accumulated Other Comprehensive Loss

        The following table summarizes the effect on net income from reclassifications out of accumulated other comprehensive loss (in thousands):

 
 Year ended 
Reclassification
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Losses on available-for-sales securities to:

          

Interest income and other, net

 $(49)$ $ 

Gains (losses) on cash flow hedges to:

  
 
  
 
  
 
 

Interest income and other, net

  (316)    

Interest expense

    1,808  (249)

  (365) 1,808  (249)

Income tax (expense) benefit

  
77
  
(633

)
 
87
 

Total gains (losses) reclassified

 $(288)$1,175 $(162)

Income Tax Allocated to the terms and conditionsComponents of Section 423(b)Other Comprehensive Income (Loss)

        The income tax effects of the Internal Revenue Code (the "Non-423(b) Plan"). The Company will retain the discretion to grant purchase rights under either the 423(b) Plan or the Non-423(b) Plan. Eligible employees may purchase a limited numbercomponents of shares of the Company's common stock at no less than 85% of the fair market value of a share of common stock at prescribed purchase intervals during an offering period. Each offering period will be comprised of a series of one or more successive and/or overlapping purchase intervals and has a maximum term of 24 months. During fiscal 2016, 2015 and 2014, the Company issued 224 thousand, 210 thousand and 204 thousand shares, respectively, under the 2009 Purchase Plan to its employees. The weighted-average fair value for purchase rights granted in fiscal 2016 under the 2009 Purchase Plan was $13.43 per share.

Accounting for Stock-Based Compensation

        Stock-based compensation costs are based on the fair values on the date of grant for stock awards and stock options and on the date of enrollment for the employee stock purchase plans. The fair values of stock awards (suchother comprehensive income (loss) were as RSUs, PSUs and RSAs) are estimated based on their intrinsic values. The fair values of MSUs are estimated using a Monte Carlo simulation. The fair values of stock options and employee stock purchase plans are estimated using the Black-Scholes option-pricing model.follows (in thousands):

        The Black-Scholes valuation calculation requires the Company to estimate key assumptions such as future stock price volatility, expected terms, risk-free rates and dividend yield. Expected stock price volatility is based upon a combination of both historical volatility and implied volatility derived from traded options on the Company's stock in the marketplace. Expected term is derived from an analysis of historical exercises and remaining contractual life of options. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant. The Company has never paid cash dividends and does not currently intend to pay cash dividends, thus it has assumed a 0% dividend yield.

        The Monte Carlo simulation used to calculate the fair value of the MSUs simulates the present value of the potential outcomes of future stock prices of the Company and the Philadelphia Semiconductor Sector Total Return Index over the requisite service period. The projection of stock prices are based on the risk-free rate of return, the volatilities of the stock price of the Company and the Index, and the correlation of the stock price of the Company with the Index.

        The Company must estimate potential forfeitures of stock grants and adjust compensation cost recorded accordingly. The estimate of forfeitures will be adjusted over the requisite service period to the extent that actual forfeitures differ, or are expected to differ, from such estimates. Changes in estimated forfeitures are recognized through a cumulative catch-up adjustment in the period of change and will also impact the amount of stock-based compensation expense to be recognized in future periods.

        The fair values of stock options and RSUs are amortized as compensation expense on a straight-line basis over the vesting period of the grants. The fair values of RSAs are fully expensed in the period of grant, when shares are immediately issued with no vesting restrictions. The fair values of MSUs are amortized as compensation expense on a straight-line basis over the performance and service periods of the grants. The fair values of PSUs are amortized as compensation expense on a straight-line basis over the performance period when the performance is probable of achievement, and over the remaining service periods thereafter. Compensation expense recognized is shown in the operating activities section of the Consolidated Statements of Cash Flows.

 
 Year ended 
Income tax (expense) benefit on:
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Net changes to available-for-sale securities:

          

Unrealized gains (losses) arising during the period

 $(79)$255 $63 

Reclassification for losses included in net income

  (10)    

Net changes to cash flow hedges:

  
 
  
 
  
 
 

Unrealized gains (losses) arising during the period

  200    (513)

Reclassification for gains (losses) included in net income          

  (66) 633  (87)

 $45 $888 $(537)

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

12. Stock-Based Compensation (Continued)13. Revenues

        The fair values estimated fromCompany groups its revenues into four categories, based on the Black-Scholes option-pricing model for ESPPmarkets and stock options granted were calculated using the following assumptions:

 
 Year Ended 
Employee Stock Purchase Plan
 December 31,
2016
 January 2,
2016
 January 3,
2015
 

Expected volatility

  30% 31% 28%

Risk-free interest rate %

  0.6% 0.2% 0.2%

Expected term (in months)

  15  8  15 

Dividend yield

       



Year Ended
Stock Options
December 31,
2016
January 2,
2016
January 3,
2015

Expected volatility

32%

Risk-free interest rate %

1.3%

Expected term (in years)

5.4

Dividend yield

        The fair values estimated from Monte Carlo simulation for MSUs were calculated using the following assumptions:

 
 Year Ended 
MSUs
 December 31,
2016
 January 2,
2016
 January 3,
2015
 

Expected volatility

  30% 31% 33%

Risk-free interest rate %

  0.9% 1.0% 0.7%

Expected term (in years)

  2.9  2.9  2.8 

Dividend yield

       

        A summary of stock-based compensation activity with respect to fiscal 2016 follows:

Stock Options
 Shares
(000s)
 Weighted-
Average
Exercise
Price
 Weighted-Average
Remaining
Contractual Term
(In Years)
 Aggregate
Intrinsic
Value
(000s)
 

Outstanding at January 2, 2016

  212 $34.64       

Granted

  173 $40.39       

Exercised

  (137)$33.08       

Cancelled or expired

  (20)$57.26       

Outstanding at December 31, 2016

  228 $37.95  7.14 $6,165 

Vested at December 31, 2016 and expected to vest

  
209
 
$

37.74
  
6.97
 
$

5,708
 

Exercisable at December 31, 2016

  
55
 
$

30.31
  
0.96
 
$

1,908
 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

12. Stock-Based Compensation (Continued)


RSAs and RSUs
 Shares
(000s)
 Weighted-
Average
Purchase
Price
 Weighted-Average
Remaining
Vesting Term
(In Years)
 Aggregate
Intrinsic
Value
(000s)
 

Outstanding at January 2, 2016

  1,554 $       

Granted

  1,169 $       

Vested or issued

  (871)$       

Cancelled or forfeited

  (163)$       

Outstanding at December 31, 2016

  1,689 $  1.05 $109,807 

Outstanding at December 31, 2016 and expected to vest

  
1,568
 
$

  
1.05
 
$

101,940
 


PSUs and MSUs
 Shares
(000s)
 Weighted-
Average
Purchase
Price
 Weighted-Average
Remaining
Vesting Term
(In Years)
 Aggregate
Intrinsic
Value
(000s)
 

Outstanding at January 2, 2016

  250 $       

Granted

  131 $       

Cancelled or forfeited

  (152)$       

Outstanding at December 31, 2016

  229 $  1.41 $14,855 

Outstanding at December 31, 2016 and expected to vest

  
184
 
$

  
1.41
 
$

11,928
 

applications in which its products may be used. The following summarizesdisaggregates the Company's weighted average fair value at the date of grant:

 
 Year Ended 
 
 December 31,
2016
 January 2,
2016
 January 3,
2015
 

Per grant of RSAs and RSUs

 $40.55 $49.14 $47.93 

Per grant of PSUs and MSUs

 $32.23 $48.36 $60.08 

        The following summarizes the Company's stock-based payment and stock option valuesrevenue by product category (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017 (1)
 December 31,
2016 (1)
 

Internet of Things

 $463,838 $395,012 $314,614 

Infrastructure

  199,478  152,158  147,677 

Broadcast

  141,412  152,980  157,746 

Access

  63,539  68,717  77,589 

 $868,267 $768,867 $697,626 

 
 Year Ended 
 
 December 31,
2016
 January 2,
2016
 January 3,
2015
 

Intrinsic value of stock options exercised

 $2,560 $6,612 $5,674 

Intrinsic value of RSAs and RSUs that vested

 $36,502 $45,298 $32,138 

Grant date fair value of RSAs and RSUs that vested

 $39,853 $41,072 $29,668 
(1)
Under the modified retrospective method, prior period amounts have not been adjusted.

        A portion of the Company's sales are made to distributors under agreements allowing certain rights of return and/or price protection related to the final selling price to the end customers. These factors impact the timing and uncertainty of revenues and cash flows. The Company received cashrecognized revenue of $2.2$24.3 million forduring fiscal 2018 from performance obligations that were satisfied in previous reporting periods. The following disaggregates the issuanceCompany's revenue by sales channel (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017 (1)
 December 31,
2016 (1)
 

Distributors

 $618,989 $547,419 $471,622 

Direct customers

  249,278  221,448  226,004 

 $868,267 $768,867 $697,626 

(1)
Under the modified retrospective method, prior period amounts have not been adjusted.

14. Stock-Based Compensation

        In fiscal 2009, the stockholders of the Company approved the 2009 Stock Incentive Plan (the "2009 Plan") and the 2009 Employee Stock Purchase Plan (the "2009 Purchase Plan"). In fiscal 2017, the stockholders of the Company approved amendments to both the 2009 Plan and the 2009 Purchase Plan. These amendments authorized additional shares of common stock net offor issuance, to comply with changes in applicable law, improve the Company's corporate governance and to implement other best practices.

2009 Stock Incentive Plan

        Under the 2009 Plan, the following may be granted: stock options, stock appreciation rights, performance shares, withheld for taxes, duringperformance stock units, restricted stock units (RSUs), restricted stock awards (RSAs), performance-based awards and other awards (collectively, all such grants are referred to as "awards"). The fiscal 2016. The Company issues shares2017 amendments to the 2009 Plan created a single share pool. All awards now deduct one share from the 2009 Plan shares reserved under its stock plans upon the exercise of stock options,available for issuance of RSAs, vesting of RSUs and MSUs, and purchases through employee stock purchase plans. The Company does not currently expect to repurchase shares from any source to satisfy such obligation.for each share granted. Awards


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

12.14. Stock-Based Compensation (Continued)

granted under the 2009 Plan generally contain vesting provisions ranging from three to four years. The following table presents detailsexercise price of stock-based compensation costs recognized in the Consolidated Statements of Income (in thousands):

 
 Year Ended 
 
 December 31,
2016
 January 2,
2016
 January 3,
2015
 

Cost of revenues

 $1,070 $960 $775 

Research and development

  19,573  19,451  18,521 

Selling, general and administrative

  18,985  22,380  19,771 

  39,628  42,791  39,067 

Income tax benefit

  8,496  9,264  4,024 

 $31,132 $33,527 $35,043 

        The Company had approximately $52.1 million of total unrecognized compensation costs related to granted stock options and awards as of December 31, 2016 that are expected tooffered under the 2009 Plan may not be recognized over a weighted-average period of approximately 2.2 years. There were no significant stock-based compensation costs capitalized into assets in anyless than 100% of the periods presented.fair market value of a share of our common stock on the date of grant. To the extent awards granted under the 2009 Plan terminate, expire or lapse for any reason, or are settled in cash, shares subject to such awards will again be available for grant.

2000 Stock Incentive Plan

        AsIn fiscal 2000, the Company's Board of December 31, 2016,Directors and stockholders approved the Company had reserved2000 Plan. The 2000 Plan contains programs for (i) the discretionary granting of stock options to employees, non-employee board members and consultants for the purchase of shares of the Company's common stock, (ii) the discretionary issuance of common stock directly (as granted under direct issuance shares in RSAs and RSUs), (iii) the granting of special below-market stock options to executive officers and other highly compensated employees of the Company for futurewhich the exercise price can be paid using payroll deductions and (iv) the automatic issuance as follows (in thousands):

2000 Stock Incentive Plan

55

2009 Stock Incentive Plan

1,935

2009 Employee Stock Purchase Plan

447

Total shares reserved

2,437

13. Employee Benefit Plan

of stock options to non-employee board members. The discretionary issuance of common stock, RSUs and stock options generally contain vesting provisions ranging from three to eight years. If permitted by the Company, maintains a defined contribution or 401(k) Plan for its qualified U.S. employees. Participants may contribute a percentage of their compensation on a pre-tax basis,stock options can be exercised immediately and, similar to the direct issuance shares, are subject to a maximum annual contribution imposed byrepurchase rights which generally lapse in accordance with the Internal Revenue Code.vesting schedule. The repurchase rights provide that upon certain defined events, the Company may make discretionary matching contributions as well as discretionary profit-sharing contributions tocan repurchase unvested shares at the 401(k) Plan.price paid per share. The Company contributed $3.4 million, $3.3 million and $3.2 million toterm of each stock option is no more than ten years from the 401(k) Plan during fiscal 2016, 2015 and 2014, respectively.date of grant.

14. Commitments and Contingencies

Operating Leases

        The Company leases certain facilities under operating lease agreements that expire at various dates through 2025.2027. Some of these arrangements contain renewal options and require the Company to pay taxes, insurance and maintenance costs.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

14. Commitments and Contingencies (Continued)

        Rent expense under operating leases was $6.0 million, $5.5 million and $4.7 million $4.6 million and $4.2 million and for fiscal 2016, 20152018, 2017 and 2014,2016, respectively. The minimum annual future rentals under the terms of these leases as of December 31, 201629, 2018 are as follows (in thousands):

Fiscal Year
  
   
 

2017

 $5,139 

2018

 3,852 

2019

 2,700  $5,287 

2020

 2,432  4,746 

2021

 2,286  4,051 

2022

 3,485 

2023

 2,810 

Thereafter

 4,638  3,842 

Total minimum lease payments

 $21,047  $24,221 

LitigationInvestment Commitment

            The Company has committed to invest up to $10.0 million in a limited partnership, of which approximately $4.3 million was funded through December 29, 2018.

    Patent LitigationLitigation—Cresta Technology

        On January 21,28, 2014, Cresta Technology Corporation ("Cresta Technology"), a Delaware corporation, filed a lawsuit against the Company Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., LG Electronics Inc. and LG Electronics U.S.A., Inc. in the United States District Court in the District of Delaware, alleging infringement of three United States Patents (the "Cresta Patents"). The Delaware District Court action has been stayed.

        On January 28, 2014, Cresta Technology also filed a complaint with the United States International Trade Commission ("ITC") alleging infringement of the same patents. On September 29, 2015, the ITC issued its Final Determination, finding that all the patent claims asserted against the Company's products were either invalid or not infringed and that Cresta Technology failed to establish the ITC's domestic industry requirement. The ITC found no violation by the Company and terminated the investigation. On November 30, 2015, Cresta Technology filed an appeal of the ITC decision to the Federal Circuit. On March 8, 2016, pursuant to a stipulated dismissal, the Federal Circuit dismissed Cresta Technology's appeal in its entirety.

        In a parallel process, the Company challenged the validity of the claims of the Cresta Patents asserted in the ITC investigation through a series ofInter-Partes Review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB) of the United States Patent and Trademark Office (USPTO). On October 21, 2015, the USPTO issued final written decisions on a first set of reviewed claims finding all of the reviewed claims invalid. On December 18, 2015, Cresta Technology appealed those adverse decisions to the United States Court of Appeals for the Federal Circuit as to this first USPTO determination. The Federal Circuit summarily affirmed the USPTO's first determination on November 8, 2016 and the mandate issued on December 16, 2016, rendering the USPTO's determination final.

        The USPTO instituted a second set of IPR proceedings against a second set of the remaining claims. On August 11, 2016, the PTAB issued its final written decisions in these proceedings and found all of these remaining claims unpatentable. On October 13, 2016, the patent owner, now known as CF Crespe LLC, filed a notice of appeal with the Federal Circuit seeking to overturn the USPTO's


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

14. Commitments and Contingencies (Continued)

final written decision as to a subset of the claims found unpatentable in this second set of IPR proceedings. That appeal is currently in briefing. No hearing date has been set.

        On March 18, 2016, Cresta Technology filed for chapter 7 bankruptcy in the United States Bankruptcy Court for the Northern District of California.

        On May 13, 2016, the Bankruptcy Court approved an agreement for DBD Credit Funding LLC ("DBD") to buy Cresta Technology's entire IP portfolio and certain related litigation. Following that sale, DBD (through an apparent assignee, CF Crespe LLC) has substituted in the Delaware District Court action, the appeal proceedings at the U.S. Court of Appeals for the Federal Circuit for the first set of IPR proceedings and the USPTO PTAB proceedings for the second set of IPRs replacing Cresta Technology.

On July 16, 2014, the Company filed a lawsuit against Cresta Technology in the United States District Court in the Northern District of California alleging infringement of six United States Patents.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

11. Commitments and Contingencies (Continued)

        Cresta Technology declared bankruptcy in 2016 and the Cresta patents and the Delaware lawsuit were acquired by Crespe LLC.

        On September 17, 2018, the Company and Crespe LLC settled all matters. The Company is seekingreceived a permanent injunctionnon-material payment from Crespe LLC. There was no payment from the Company and an awardthe Company received a full license to the Cresta Patents and dismissal of damages and attorney fees. Asall claims.

Patent Litigation—Bandspeed

        On June 21, 2018, Bandspeed, LLC ("Bandspeed"), a resultTexas limited liability company, filed a lawsuit against the Company in the United States District Court of the chapter 7 bankruptcy filing by Cresta Technology, these proceedings were stayed. However, as a resultWestern District of the May 13, 2016 sale order by the Bankruptcy Court, DBD and CF Crespe LLC were ordered to substitute in as Defendant for Cresta Technology. DBD and CF Crespe LLC have appealed the Bankruptcy Court's order in that regard. Subject to that appeal, the Company's patentTexas, Austin Division, alleging infringement trial against DBD and CF Crespe LLC is set to begin October 2, 2017.

        As is customary in the semiconductor industry,of eight United States Patents. On November 9, 2018, the Company provides indemnification protectionand Bandspeed settled all matters, and the Court ordered a dismissal on November 19, 2018. The Company made a non-material payment to its customers for intellectual property claims relatedBandspeed and received a full license to the Company's products. The Company has not accrued any material liability on its Consolidated Balance Sheet related to such indemnification obligations in connection with the Cresta Technology litigation.

        The Company intends to continue to vigorously defend against Cresta Technology's (now DBDalleged patents and CF Crespe LLC's) allegations and to continue to pursue its claims against Cresta and their patents. At this time, the Company cannot predict the outcomedismissal of these matters or the resulting financial impact to it, if any.all claims.

Other

        The Company is involved in various other legal proceedings that have arisen in the normal course of business. While the ultimate results of these matters cannot be predicted with certainty, the Company does not expect them to have a material adverse effect on its Consolidated Financial Statements.

15. Related Party Transactions12. Stockholders' Equity

Common Stock

        The Company issued 0.8 million shares of common stock during fiscal 2018.

Share Repurchase Programs

        The Board of Directors authorized the following share repurchase programs (in thousands):

Program Authorization Date
 Program
Termination
Date
 Program
Amount
 

October 2017

 December 2019 $200,000*

January 2017

 December 2017 $100,000 

August 2015

 December 2016 $100,000 

*
In October 2018, the Board of Directors increased the share repurchase amount for the October 2017 program from $100 million to $200 million and extended the termination date from December 2018 to December 2019.

        These programs allow for repurchases to be made in the open market or in private transactions, including structured or accelerated transactions, subject to applicable legal requirements and market conditions. The Company repurchased 0.4 million shares of its common stock for $39.3 million during fiscal 2018. The Company did not repurchase any shares of its common stock during fiscal 2017. The


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

12. Stockholders' Equity (Continued)

Company repurchased 0.9 million shares of its common stock for $40.5 million during fiscal 2016. These shares were retired upon repurchase.

Reclassifications From Accumulated Other Comprehensive Loss

        The following table summarizes the effect on net income from reclassifications out of accumulated other comprehensive loss (in thousands):

 
 Year ended 
Reclassification
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Losses on available-for-sales securities to:

          

Interest income and other, net

 $(49)$ $ 

Gains (losses) on cash flow hedges to:

  
 
  
 
  
 
 

Interest income and other, net

  (316)    

Interest expense

    1,808  (249)

  (365) 1,808  (249)

Income tax (expense) benefit

  
77
  
(633

)
 
87
 

Total gains (losses) reclassified

 $(288)$1,175 $(162)

Income Tax Allocated to the Components of Other Comprehensive Income (Loss)

        The income tax effects of the components of other comprehensive income (loss) were as follows (in thousands):

 
 Year ended 
Income tax (expense) benefit on:
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Net changes to available-for-sale securities:

          

Unrealized gains (losses) arising during the period

 $(79)$255 $63 

Reclassification for losses included in net income

  (10)    

Net changes to cash flow hedges:

  
 
  
 
  
 
 

Unrealized gains (losses) arising during the period

  200    (513)

Reclassification for gains (losses) included in net income          

  (66) 633  (87)

 $45 $888 $(537)

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

13. Revenues

        The Company groups its revenues into four categories, based on the markets and applications in which its products may be used. The following disaggregates the Company's revenue by product category (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017 (1)
 December 31,
2016 (1)
 

Internet of Things

 $463,838 $395,012 $314,614 

Infrastructure

  199,478  152,158  147,677 

Broadcast

  141,412  152,980  157,746 

Access

  63,539  68,717  77,589 

 $868,267 $768,867 $697,626 

(1)
Under the modified retrospective method, prior period amounts have not been adjusted.

        A portion of the Company's sales are made to distributors under agreements allowing certain rights of return and/or price protection related to the final selling price to the end customers. These factors impact the timing and uncertainty of revenues and cash flows. The Company recognized revenue of $24.3 million during fiscal 2018 from performance obligations that were satisfied in previous reporting periods. The following disaggregates the Company's revenue by sales channel (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017 (1)
 December 31,
2016 (1)
 

Distributors

 $618,989 $547,419 $471,622 

Direct customers

  249,278  221,448  226,004 

 $868,267 $768,867 $697,626 

(1)
Under the modified retrospective method, prior period amounts have not been adjusted.

14. Stock-Based Compensation

        In August 2016, Bill Bock,fiscal 2009, the stockholders of the Company approved the 2009 Stock Incentive Plan (the "2009 Plan") and the 2009 Employee Stock Purchase Plan (the "2009 Purchase Plan"). In fiscal 2017, the stockholders of the Company approved amendments to both the 2009 Plan and the 2009 Purchase Plan. These amendments authorized additional shares of common stock for issuance, to comply with changes in applicable law, improve the Company's corporate governance and to implement other best practices.

2009 Stock Incentive Plan

        Under the 2009 Plan, the following may be granted: stock options, stock appreciation rights, performance shares, performance stock units, restricted stock units (RSUs), restricted stock awards (RSAs), performance-based awards and other awards (collectively, all such grants are referred to as "awards"). The fiscal 2017 amendments to the 2009 Plan created a membersingle share pool. All awards now deduct one share from the 2009 Plan shares available for issuance for each share granted. Awards


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

14. Stock-Based Compensation (Continued)

granted under the 2009 Plan generally contain vesting provisions ranging from three to four years. The exercise price of stock options offered under the 2009 Plan may not be less than 100% of the fair market value of a share of our common stock on the date of grant. To the extent awards granted under the 2009 Plan terminate, expire or lapse for any reason, or are settled in cash, shares subject to such awards will again be available for grant.

2000 Stock Incentive Plan

        In fiscal 2000, the Company's Board of Directors and stockholders approved the 2000 Plan. The 2000 Plan contains programs for (i) the discretionary granting of stock options to employees, non-employee board members and consultants for the purchase of shares of the Company's boardcommon stock, (ii) the discretionary issuance of directors, joinedcommon stock directly (as granted under direct issuance shares in RSAs and RSUs), (iii) the boardgranting of directors of Spredfast. Spredfast has been a tenant in onespecial below-market stock options to executive officers and other highly compensated employees of the buildingsCompany for which the exercise price can be paid using payroll deductions and (iv) the automatic issuance of stock options to non-employee board members. The discretionary issuance of common stock, RSUs and stock options generally contain vesting provisions ranging from three to eight years. If permitted by the Company, stock options can be exercised immediately and, similar to the direct issuance shares, are subject to repurchase rights which generally lapse in accordance with the vesting schedule. The repurchase rights provide that upon certain defined events, the Company can repurchase unvested shares at the Company's headquarters in Austin, Texas since May 2013. During fiscal 2016, 2015price paid per share. The term of each stock option is no more than ten years from the date of grant.

Stock Grants and 2014, theModifications

        The Company received payments from Spredfast of $3.2granted to its employees 0.6 million, $2.50.7 million and $1.61.3 million respectively,shares of full value awards and 0.0 million, 0.0 million, and 0.2 million stock options from the 2009 Plan during fiscal 2018, 2017 and 2016, respectively.

        The Company recorded $0.9 million in selling, general and administrative expense during fiscal 2016 in connection with the leased facilities.modifications of certain equity awards. The modifications were pursuant to three employee terminations in fiscal 2016. There were no other significant modifications made to any stock grants during fiscal 2018, 2017 or 2016.

        Included in the full value awards granted under the 2009 Plan in fiscal 2018, 2017 and 2016 were a total of 41 thousand, 54 thousand and 65 thousand market-based stock awards, respectively. The awards, also known as market stock units (MSUs), provide the rights to acquire a number of shares of common stock for no cash consideration based upon achievement of specified levels of market conditions. The requisite service period for these MSUs is also the vesting period, which is generally three years. The performance criteria of the MSUs measure the difference between the total stockholders' return of the Company against that of the PHLX Semiconductor Sector Total Return Index.

        Also included in the full value awards granted under the 2009 Plan during fiscal 2018, 2017 and 2016 were 41 thousand, 54 thousand and 65 thousand performance-based stock awards, respectively. The awards, also known as PSUs, provide for the rights to acquire a number of shares of common stock for no cash consideration based upon the achievement of specified revenue objectives during the year. The requisite service period for these PSUs is approximately three years from the date of grant.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

14. Stock-Based Compensation (Continued)

2009 Employee Stock Purchase Plan

        The rights to purchase common stock granted under the 2009 Purchase Plan are intended to be treated as either (i) purchase rights granted under an "employee stock purchase plan," as that term is defined in Section 423(b) of the Internal Revenue Code (the "423(b) Plan"), or (ii) purchase rights granted under an employee stock purchase plan that is not subject to the terms and conditions of Section 423(b) of the Internal Revenue Code (the "Non-423(b) Plan"). The Company will retain the discretion to grant purchase rights under either the 423(b) Plan or the Non-423(b) Plan. Eligible employees may purchase a limited number of shares of the Company's common stock at no less than 85% of the fair market value of a share of common stock at prescribed purchase intervals during an offering period. Each offering period will be comprised of a series of one or more successive and/or overlapping purchase intervals and has a maximum term of 24 months. During fiscal 2018, 2017 and 2016, the Company issued 223 thousand, 239 thousand and 224 thousand shares, respectively, under the 2009 Purchase Plan to its employees. The weighted-average fair value for purchase rights granted in fiscal 2018 under the 2009 Purchase Plan was $22.59 per share.

Accounting for Stock-Based Compensation

        Stock-based compensation costs are based on the fair values on the date of grant for stock awards and stock options and on the date of enrollment for the employee stock purchase plans. The fair values of stock awards (such as RSUs, PSUs and RSAs) are estimated based on their intrinsic values. The fair values of MSUs are estimated using a Monte Carlo simulation. The fair values of stock options and employee stock purchase plans are estimated using the Black-Scholes option-pricing model.

        The Black-Scholes valuation calculation requires the Company to estimate key assumptions such as future stock price volatility, expected terms, risk-free rates and dividend yield. Expected stock price volatility is based upon a combination of both historical volatility and implied volatility derived from traded options on the Company's stock in the marketplace. Expected term is derived from an analysis of historical exercises and remaining contractual life of options. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant. The Company has never paid cash dividends and does not currently intend to pay cash dividends, thus it has assumed a 0% dividend yield.

        The Monte Carlo simulation used to calculate the fair value of the MSUs simulates the present value of the potential outcomes of future stock prices of the Company and the Philadelphia Semiconductor Sector Total Return Index over the requisite service period. The projection of stock prices are based on the risk-free rate of return, the volatilities of the stock price of the Company and the Index, and the correlation of the stock price of the Company with the Index.

        The Company estimates potential forfeitures of stock grants and adjusts compensation cost recorded accordingly. The estimate of forfeitures will be adjusted over the requisite service period to the extent that actual forfeitures differ, or are expected to differ, from such estimates. Changes in estimated forfeitures are recognized through a cumulative catch-up adjustment in the period of change and will also impact the amount of stock-based compensation expense to be recognized in future periods.

        The fair values of stock options and RSUs are amortized as compensation expense on a straight-line basis over the vesting period of the grants. The fair values of RSAs are fully expensed in


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

14. Stock-Based Compensation (Continued)

the period of grant, when shares are immediately issued with no vesting restrictions. The fair values of MSUs are amortized as compensation expense on a straight-line basis over the performance and service periods of the grants. The fair values of PSUs are amortized as compensation expense on a straight-line basis over the performance period when the performance is probable of achievement, and over the remaining service periods thereafter. Compensation expense recognized is shown in the operating activities section of the Consolidated Statements of Cash Flows.

        The fair values estimated from the Black-Scholes option-pricing model for ESPP and stock options granted were calculated using the following assumptions:

 
 Year Ended 
Employee Stock Purchase Plan
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Expected volatility

  30% 28% 30%

Risk-free interest rate %

  2.4% 1.1% 0.6%

Expected term (in months)

  9  8  15 

Dividend yield

       



Year Ended
Stock Options
December 29,
2018
December 30,
2017
December 31,
2016

Expected volatility

32%

Risk-free interest rate %

1.3%

Expected term (in years)

5.4

Dividend yield

        The fair values estimated from Monte Carlo simulation for MSUs were calculated using the following assumptions:

 
 Year Ended 
MSUs
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Expected volatility

  29% 31% 30%

Risk-free interest rate %

  2.4% 1.6% 0.9%

Expected term (in years)

  2.9  2.9  2.9 

Dividend yield

       

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

14. Stock-Based Compensation (Continued)

        A summary of stock-based compensation activity with respect to fiscal 2018 follows:

Stock Options
 Shares
(000s)
 Weighted-
Average
Exercise
Price
 Weighted-Average
Remaining
Contractual
Term
(In Years)
 Aggregate
Intrinsic
Value
(000s)
 

Outstanding at December 30, 2017

  170 $38.88       

Exercised

  (33)$36.45       

Outstanding at December 29, 2018

  137 $39.47  7.1 $5,327 

Vested at December 29, 2018 and expected to vest

  
83
 
$

40.39
  
7.1
 
$

3,154
 

Exercisable at December 29, 2018

  
50
 
$

37.88
  
7.1
 
$

2,031
 


RSAs and RSUs
 Shares
(000s)
 Weighted-
Average
Purchase
Price
 Weighted-Average
Remaining
Vesting Term
(In Years)
 Aggregate
Intrinsic
Value
(000s)
 

Outstanding at December 30, 2017

  1,523 $       

Granted

  522 $       

Vested or issued

  (730)$       

Cancelled or forfeited

  (97)$       

Outstanding at December 29, 2018

  1,218 $  0.86 $95,620 

Outstanding at December 29, 2018 and expected to vest

  
1,147
 
$

  
0.86
 
$

90,008
 


PSUs and MSUs
 Shares
(000s)
 Weighted-
Average
Purchase
Price
 Weighted-Average
Remaining
Vesting Term
(In Years)
 Aggregate
Intrinsic
Value
(000s)
 

Outstanding at December 30, 2017

  259 $       

Granted

  81 $       

Earned or issued

  (37)$       

Cancelled or forfeited

  (21)$       

Outstanding at December 29, 2018

  282 $  1.1 $22,164 

Outstanding at December 29, 2018 and expected to vest

  
249
 
$

  
1.1
 
$

19,615
 

        The following summarizes the Company's weighted average fair value at the date of grant:

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Per grant of RSAs and RSUs

 $93.75 $72.85 $40.55 

Per grant of PSUs and MSUs

 $97.53 $78.40 $32.23 

Per grant of stock options

 $ $ $40.38 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

14. Stock-Based Compensation (Continued)

        The following summarizes the Company's stock-based payment and stock option values (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Intrinsic value of stock options exercised

 $1,952 $2,174 $2,560 

Intrinsic value of RSUs that vested

 $68,012 $53,093 $36,502 

Grant date fair value of RSUs that vested

 $37,720 $32,449 $39,853 

Intrinsic value of MSUs that vested

 $3,562 $687 $ 

Grant date fair value of MSUs that vested

 $1,788 $633 $ 

        The Company received cash of $13.3 million for the issuance of common stock, and paid $19.5 million for shares withheld for taxes, during fiscal 2018. The Company issues shares from the shares reserved under its stock plans upon the exercise of stock options, vesting of RSUs, PSUs and MSUs, and purchases through employee stock purchase plans. The Company does not currently expect to repurchase shares from any source to satisfy such obligation.

        The following table presents details of stock-based compensation costs recognized in the Consolidated Statements of Income (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Cost of revenues

 $1,238 $1,090 $1,070 

Research and development

  23,867  21,771  19,573 

Selling, general and administrative

  24,972  21,891  18,985 

  50,077  44,752  39,628 

Income tax benefit

  8,890  11,073  8,496 

 $41,187 $33,679 $31,132 

        The decrease in income tax benefit in fiscal 2018 was due to the reduced current and future deductibility of executive stock compensation as a result of the Tax Cuts and Jobs Act. The increase in income tax benefit in fiscal 2017 was primarily due to the recognition of excess tax benefits in connection with the Company's adoption of ASU 2016-09, offset in part by an adjustment in the deferred tax asset due to the recent tax reform. The Company had approximately $65.4 million of total unrecognized compensation costs related to granted stock options and awards as of December 29, 2018 that are expected to be recognized over a weighted-average period of approximately 1.9 years. There were no significant stock-based compensation costs capitalized into assets in any of the periods presented.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

14. Stock-Based Compensation (Continued)

        As of December 29, 2018, the Company had reserved shares of common stock for future issuance as follows (in thousands):

2009 Stock Incentive Plan

2,343

2009 Employee Stock Purchase Plan

985

Total shares reserved

3,328

15. Employee Benefit Plan

        The Company maintains a defined contribution or 401(k) Plan for its qualified U.S. employees. Participants may contribute a percentage of their compensation on a pre-tax basis, subject to a maximum annual contribution imposed by the Internal Revenue Code. The Company may make discretionary matching contributions as well as discretionary profit-sharing contributions to the 401(k) Plan. The Company contributed $3.7 million, $3.5 million and $3.4 million to the 401(k) Plan during fiscal 2018, 2017 and 2016, respectively.

16. Related Party Transactions (Continued)

        On July 1, 2013, Geir Førre joined the Company as senior vice president. Mr. Førre was chief executive officer of Energy Micro, until it was acquired by the Company. Mr. Førre was the beneficial owner of approximately 30% of the Energy Micro equity and accordingly received approximately $35 million at closing.equity. In the first quarter of 2015, Mr. Førre received approximately $6.1 million of the $20.0 million paid for the holdback related to potential indemnification claims and approximately $1.9 million of the $6.3 million paid for the fiscal 2014 earn-out. On March 11, 2016, the Company entered into an agreement which settled the amount of the earn-out to be paid for fiscal 2015 through 2018. Under this agreement, Mr. Førre received approximately $4.8 million of the $16.0 million that was paid.million.

        Alf-Egil Bogen served on the Company's board of directors from October 17, 2013 to April 21, 2016. Mr. Bogen was chief marketing officer of Energy Micro, until it was acquired by the Company. Mr. Bogen was the beneficial owner of approximately 2% of the Energy Micro equity and accordingly received approximately $0.9 million at closing. In the first quarter of 2015, Mr. Bogen received approximately $0.4 million of the $20.0 million paid for the holdback related to potential indemnification claims and approximately $0.1 million of the $6.3 million paid for the fiscal 2014 earn-out.equity. Under the settlement agreement, Mr. Bogen received approximately $0.3 million of the $16.0 million that was paid for fiscal 2015 through 2018 earn-out. Mr. Bogen

17. Income Taxes

        The Tax Cuts and Jobs Act (the Act) was enacted in the U.S. on December 22, 2017. The Act reduced the U.S. federal corporate income tax rate to 21% from 35%, required companies to pay a one-time Transition Tax on earnings of certain foreign subsidiaries that were previously tax deferred and created new taxes on certain foreign-sourced earnings. In 2017 and the first nine months of 2018, the Company recorded provisional amounts for certain enactment-date effects of the Act by applying the guidance in Staff Accounting Bulletin No. 118 or "SAB 118" because it had invested approximately $0.8 million in Energy Micro priornot yet completed the enactment-date accounting for these effects. In 2017, the Company recorded tax expense related to the acquisition.enactment-date effects of the Act that included recording the one-time Transition Tax liability related to undistributed earnings of certain foreign subsidiaries that were not previously taxed, the revaluation of deferred tax assets and liabilities and other deferred tax impacts. In 2018, certain discrete adjustments to provisional amounts were recorded. The changes to the 2017 enactment-date provisional amounts decreased the effective tax rate in 2018 by (6.2)%.


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16.
Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

17. Income Taxes (Continued)

SAB 118 measurement period

        The Company applied the guidance in SAB 118 when accounting for the enactment-date effects of the Act in 2017 and throughout 2018. At December 30, 2017, the Company had not completed its accounting for the enactment-date income tax effects of the Act under ASC 740,Income Taxes, specifically for the following aspects: remeasurement of deferred tax assets and liabilities, one-time Transition Tax, its indefinite reinvestment assertion and its accounting policy for global intangible low-taxed income. As of December 29, 2018, the Company has now completed its accounting for all of the enactment-date income tax effects of the Act. As further discussed below, during 2018, the Company recognized a benefit of $4.5 million to the provisional amounts recorded at December 30, 2017 and included these adjustments as a component of income tax expense from continuing operations.

One-time Transition Tax

        The one-time Transition Tax is based on the Company's total post-1986 earnings and profits (E&P), which were previously deferred from U.S. income tax under U.S. tax law. The Company recorded a provisional amount for its one-time Transition Tax liability for each of its foreign subsidiaries, resulting in a Transition Tax cost of $54.4 million, which after offset by tax attributes resulted in a total provisional Transition Tax liability of $42.6 million at December 30, 2017.

        Upon further analysis of the Act, Notices and Regulations issued and proposed by the U.S. Department of the Treasury and the Internal Revenue Service, the Company finalized its calculations of the Transition Tax liability during 2018. The Company decreased its December 30, 2017 provisional amount by $6.1 million, which is included as a component of income tax expense from continuing operations. The Company elected to pay the Transition Tax over the eight-year period provided in the Act. As of December 29, 2018, the unpaid balance of its Transition Tax obligation is $21.6 million, which is payable between April 2022 and April 2025.

Deferred tax assets and liabilities

        As of December 30, 2017, the Company remeasured certain deferred tax assets and liabilities based on the tax rates at which they were expected to reverse in the future (which was generally 21%), by recording a net provisional benefit of $28.1 million. This included the release of a deferred tax liability for future foreign earnings generated by one of the Company's foreign subsidiaries upon resolution of the Altera case of $39.4 million as well as the release of approximately $10.5 million of valuation allowances with corresponding deferred tax benefits. These benefits were offset by the revaluation of the Company's net deferred tax asset and a corresponding increase to deferred tax expense of $21.8 million. Upon further analysis of certain aspects of the Act and refinement of its calculations during the 12 months ended December 29, 2018, the Company reduced its provisional benefit by $1.0 million, which is included as a component of income tax expense from continuing operations.

Global intangible low-taxed income (GILTI)

        The Act subjects a U.S. shareholder to tax on GILTI earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No. 5,Accounting for Global Intangible Low-Taxed Income, states that an


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

17. Income Taxes (Continued)

entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or to provide for the tax expense related to GILTI in the year the tax is incurred as a period expense.

        Because the Company was still evaluating the GILTI provisions as of December 30, 2017, no GILTI-related deferred amounts were recorded in 2017. After further consideration in the current year, the Company has elected to account for GILTI as a period cost in the year the tax is incurred.

Indefinite reinvestment assertion

        Beginning in 2018, the Act provides for a 100% dividends received deduction for dividends received from 10-percent owned foreign corporations by U.S. corporate shareholders, subject to a one-year holding period. Although dividend income is now generally exempt from U.S. federal income tax in the hands of U.S. corporate shareholders, companies must still apply the guidance of ASC 740-30-25-18 to account for the tax consequences of outside basis differences and other tax impacts of their investments in non-U.S. subsidiaries. As the Company was still evaluating how the Act would impact the Company's existing indefinite reinvestment assertion as of December 30, 2017, no deferred tax impacts for this item were recorded.

        Upon further analysis, the Company has modified its unremitted earnings assertion both historically and on a go-forward basis to exclude the net book income of its Singapore subsidiary from the indefinite reinvestment assertion. As a result, the Company has accrued a deferred tax liability of $0.6 million associated with the state tax cost of remitting these earnings which is included as a component of income tax expense from continuing operations.

        Income before income taxes includes the following components (in thousands):

 
 Year Ended 
 
 December 31,
2016
 January 2,
2016
 January 3,
2015
 

Domestic

 $4,313 $2,249 $38,174 

Foreign

  60,183  28,014  10,866 

 $64,496 $30,263 $49,040 

        The provision for income taxes consists of the following (in thousands):


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Current:

       

Domestic

 $2,639 $951 $7,083  $19,777 $9,700 $4,313 

International

 4,421 3,015 882 

Foreign

 52,384 67,203 60,183 

Total Current

 7,060 3,966 7,965 

Deferred:

 
 
 
 
 
 
 

Domestic

 (2,430) (5,825) 2,352 

International

 (1,628) 2,536 702 

Total Deferred

 (4,058) (3,289) 3,054 

Provision for income taxes

 $3,002 $677 $11,019 

 $72,161 $76,903 $64,496 

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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

16.17. Income Taxes (Continued)

        The provision (benefit) for income taxes consists of the following (in thousands):

 
 Year Ended 
 
 December 29,
2018
 December 30,
2017
 December 31,
2016
 

Current:

          

Domestic

 $(8,843)$48,947 $2,639 

Foreign

  5,888  7,077  4,421 

Total Current

  (2,955) 56,024  7,060 

Deferred:

  
 
  
 
  
 
 

Domestic

  (8,978) (25,760) (2,430)

Foreign

  503  (453) (1,628)

Total Deferred

  (8,475) (26,213) (4,058)

Provision (benefit) for income taxes

 $(11,430)$29,811 $3,002 

        The reconciliation of the federal statutory tax rate to the Company's effective tax rate is as follows:


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Federal statutory rate

 35.0% 35.0% 35.0% 21.0% 35.0% 35.0%

Foreign tax rate benefit

 (27.2) (30.7) (3.5) (12.9) (25.4) (22.6)

Research and development tax credits

 (4.1) (5.6) (8.6) (9.8) (4.5) (4.1)

GILTI and Subpart F income

 4.3 1.4 1.4 

Nondeductible (nontaxable) foreign expenses

 3.9 1.1 (4.0)

State tax expense

 1.5 0.9 0.6 

Release of prior year unrecognized tax benefits

 (1.7) (1.9) (2.6) (2.7) (0.6) (1.7)

Excess officer compensation

 1.4 3.2 2.3  2.4 1.5 1.4 

Other tax effects of equity compensation

 (0.4) (2.2) (1.5)

Change in cost-sharing treatment of stock-based compensation

 (0.5) (7.1)   (2.2) 5.2 (0.5)

Excess tax benefit of stock-based compensation

 (5.9) (5.6)  

Change in prior period valuation allowance

 (0.6) 8.8 (1.4) (2.5) (1.3) (0.6)

Transition tax on unremitted foreign earnings

 (8.4) 70.8  

Revaluation of deferred tax balances

 0.3 28.2  

Other deferred tax impacts of tax reform

 (3.1) (64.8)  

Other

 2.4 0.5 1.3  (1.3) (0.9) 1.3 

Effective Tax Rate

 4.7% 2.2% 22.5% (15.8)% 38.8% 4.7%

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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

17. Income Taxes (Continued)

        The effective tax rate for fiscal 2016 increased2018 decreased from fiscal 20152017 primarily due to fiscal 2015 including a net benefit from a changethe reduction in the U.S. federal statutory rate as well as the inclusion of one-time tax accounting treatmentimpacts recorded in 2017 from the enactment of stock-based compensation in a cost-sharing arrangement following a U.S. Tax Court case (Altera). The increasethe Act. This decrease in the effective tax rate was offset by a reductiondecrease in the prior period valuation allowance.Company's foreign tax rate benefit.

        The effective tax rate for fiscal 2015 decreased2017 increased from fiscal 2014,2016 primarily due to the completionone-time Transition Tax on unrepatriated earnings of paymentscertain foreign subsidiaries as a result of the enactment of the Act. Additional tax expense was also recognized for the revaluation of the Company's deferred tax assets and liabilities due to the change in the federal tax rate from 35% to 21%. These increases in tax expense were partially offset by the release of a deferred tax liability related to a prior yearfuture foreign earnings expected under the Company's intercompany licensingcost-sharing arrangement, as well as the recognition of a net benefit from a change in the tax accounting treatment of stock-based compensation in a cost-sharing arrangement following a U.S. Tax Court case (Altera). The decrease in the effective tax rate during fiscal 2015 was offset by an increase in the prior year valuation allowance related to lower expectations of profitability in jurisdictions whereestablished on federal research and development tax attributes exist.credits.

        On July 27, 2015, the U.S. Tax Court (the "Court") issued an opinion in Altera Corp. v. Commissioner which concluded that related to the treatment of stock-based compensation expenseparties in an intercompany cost-sharing arrangement. A final decision was entered by the Court on December 1, 2015. In its opinion, the Court accepted Altera's position of excludingarrangement are not required to share expenses related to stock-based compensation from its cost-sharing arrangement and concluded that the related U.S. Treasury Regulations were invalid.compensation. In February 2016, the U.S. Internal Revenue Service (the "IRS") appealed the decision to the U.S Court of Appeals for the Ninth Circuit (the "Ninth Circuit"). On July 24, 2018, the Ninth Circuit reversed the 2015 decision of the U.S. Tax Court; however, on August 7, 2018, the Ninth Circuit withdrew its July 2018 decision to allow time for a reconstituted panel to confer on the appeal. On October 16, 2018, a rehearing was held, however, no decision has been made by the Ninth Circuit. Although the IRS has appealed the decision, and the U.S. Treasury has not withdrawn the requirement to include stock-based compensation from its regulations, based on the facts and circumstances of the Tax Court Case, the Company believes that it is more likely than notcontinues to reflect a tax benefit in its financial statements based on the expectation that the Tax Court decision will be upheld and has recognized a benefit in itson appeal. As of the end of fiscal 2018, the Company's financial statements of $33.1 million. This change to cost-sharing is expected to increase the Company's cumulative foreign earnings at the time of final resolution of the case. As such, the Company has accruedreflect a net deferred tax liabilityasset of $31.2$27.2 million for the U.S. tax cost of potential repatriation of the associated foreign earnings because at this time, the Company cannot reasonably conclude that it will have the ability and intent to indefinitely reinvest these contingent earnings.position. The Company will continue to monitor ongoing developments and potential impacts to its Consolidated Financial Statements.


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

16. Income Taxes (Continued)

        The Company's operations in Singapore are subject to reduced tax rates through June 30, 2019,2024, as long as certain conditions are met. TheWithout the impact of the one-time Transition Tax, the income tax benefit from the reduced Singapore tax rate reflected in earnings was approximately $5.4 million (representing $0.12 per diluted share) in fiscal 2018, approximately $11.0 million (representing $0.25 per diluted share) in fiscal 2017 and approximately $7.7 million (representing $0.18 per diluted share) in fiscal 2016, approximately $14.4 million (representing $0.34 per diluted share) in fiscal 2015 and approximately $2.0 million (representing $0.05 per diluted share) in fiscal 2014.2016.

        At the end of fiscal 2016, undistributed earnings of the Company's foreign subsidiaries of approximately $361.4 million are intended to be permanently reinvested outside the U.S. Accordingly, no provision for U.S. federal and state income taxes associated with a distribution of these earnings has been made. Determination of the amount of the unrecognized deferred tax liability on these unremitted earnings is not practicable.

Deferred Income Taxes

        Deferred tax assets and liabilities are recorded for the estimated tax impact of temporary differences between the tax basis and book basis of assets and liabilities. Significant components of the


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

17. Income Taxes (Continued)

Company's deferred taxes as of December 31, 201629, 2018 and January 2, 2016December 30, 2017 are as follows (in thousands):


 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

Deferred tax assets:

          

Net operating loss carryforwards

 $21,187 $25,869  $9,973 $12,925 

Research and development tax credit carryforwards

 15,068 13,335  12,500 12,322 

Stock-based compensation

 7,396 8,757  4,360 5,256 

Depreciation and amortization

 7,799  

Capitalized research and development

 6,802 8,741  2,521 3,468 

Deferred income on shipments to distributors

 9,338 7,413  5,824 7,070 

Expected future cost-sharing adjustment

 29,719 25,896  25,257 21,582 

Accrued liabilities and other

 11,321 8,619  7,737 6,999 

 100,831 98,630  75,971 69,622 

Less: Valuation allowance

 (12,361) (10,264) (4,975) (6,518)

 88,470 88,366  70,996 63,104 

Deferred tax liabilities:

 
 
 
 
  
 
 
 
 

Acquired intangible assets

 25,785 33,020  20,656 13,884 

Depreciation and amortization

 2,939 2,349  4,604 1,274 

Unremitted foreign earnings for expected future cost-sharing adjustment

 31,165 27,495 

Convertible debt

 8,080 10,351 

Prepaid expenses and other

 3,069 1,991  2,142 1,421 

 62,958 64,855  35,482 26,930 

Net deferred tax assets

 $25,512 $23,511  $35,514 $36,174 

        As of December 31, 2016,29, 2018, the Company had federal net operating loss and research and development tax credit carryforwards of approximately $44.5$32.7 million and $1.9 million, respectively, as a result of the Silicon Clocks, Spectra Linear and Ember acquisitions. These carryforwards expire in fiscal years 20212020 through 2032.2031. Recognition of these loss and credit carryforwards is subject to an annual


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

16. Income Taxes (Continued)

limit, which may cause them to expire before they are used. Additionally, as of December 31, 2016, the Company had generated $7.4 million of federal research and development tax credit carryforwards. These carryforwards will begin expiring in 2036.

        As of December 31, 2016,29, 2018, the Company had foreign net operating loss carryforwards of approximately $13.2$1.9 million as a result of the Energy Micro acquisition. These loss carryforwards do not expire and recognition is not subject to an annual limit.

        The Company also had state loss, state tentative minimum tax credit, and state research and development tax credit carryforwards of approximately $49.1$43.8 million, $0.1 million, and $13.1$13.5 million, respectively. A portion of these loss and credit carryforwards was generated by the Company and a portion was acquired through the Integration Associates, Silicon Clocks, Spectra Linear, Ember and EmberZentri acquisitions. Certain of these carryforwards expire in fiscal years 20172019 through 2033,2036, and others do not expire. Recognition of some of these loss and credit carryforwards is subject to an annual limit, which may cause them to expire before they are used.


Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 29, 2018 (Continued)

17. Income Taxes (Continued)

        A valuation allowance is established against a deferred tax asset when it is more likely than not that the deferred tax asset will not be realized. As of December 31, 2016,29, 2018, the Company maintains a valuation allowance with respect to certain deferred tax assets relating primarily to U.S. federal and state research and development tax credit and state net operating loss carryforwards.

        At the end of fiscal 2018, undistributed earnings of certain of the Company's foreign subsidiaries of approximately $105 million are intended to be permanently reinvested outside the U.S. Accordingly, no provision for foreign withholding tax and state income taxes associated with a distribution of these earnings has been made. Determination of the amount of the unrecognized deferred tax liability on these unremitted earnings is not practicable.

Uncertain Tax Positions

        The following table summarizes the activity related to gross unrecognized tax benefits (in thousands):


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

Beginning balance

 $3,610 $3,929 $4,998  $3,187 $3,054 $3,610 

Additions based on tax positions related to current year

 439 432 465  630 456 439 

Additions based on tax positions related to prior years

 99  58  115 114 99 

Reductions for tax positions as a result of a lapse of the applicable statute of limitations

 (1,094) (751) (1,592) (1,896) (437) (1,094)

Ending balance

 $3,054 $3,610 $3,929  $2,036 $3,187 $3,054 

        As of December 29, 2018, December 30, 2017 and December 31, 2016, January 2, 2016 and January 3, 2015, the Company had gross unrecognized tax benefits, inclusive of $3.0interest, of $2.1 million, $3.6$3.2 million and $3.9$3.0 million, respectively, of which $2.2$2.1 million, $3.2 million and $4.0$2.2 million, respectively, would affect the effective tax rate if recognized.

        The Company recognizes interest and penalties related to unrecognized tax benefits in the provision for income taxes. These amounts were not material for fiscal years 2016,2018, 2017 and 2016.

        The Norwegian Tax Administration ("NTA") has completed its examination of the Company's Norwegian subsidiary for income tax matters relating to fiscal years 2013, 2014, 2015 and 2014.

        Tax years 2012 through 2016 remain open2016. The Company received a final assessment from the NTA in December 2017 concerning an adjustment to examination byits 2013 taxable income related to the major taxing jurisdictions to which the Company is subject.pricing of an intercompany transaction. The Company is currently appealing the assessment. Since the original assessment was issued, the NTA has reduced its assessment. The revised adjustment to the pricing of the intercompany transaction results in approximately $16.2 million additional Norwegian income tax. The Company disagrees with the NTA's assessment and believes the Company's position on this matter is more likely than not currently under audit in any major taxing jurisdiction.to be sustained. The Company plans to exhaust all available administrative remedies, and if unable to resolve this


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Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 201629, 2018 (Continued)

16.17. Income Taxes (Continued)

        Althoughmatter through administrative remedies with the timingNTA, the Company plans to pursue judicial remedies. The NTA may request an advance payment of resolution, settlement and closures of auditsapproximately $9 million during the appeal process.

        The Company believes that it has accrued adequate reserves related to all matters contained in tax periods open to examination. Should the Company experience an unfavorable outcome in the NTA matter, however, such an outcome could have a material impact on its financial statements.

        Tax years 2014 through 2018 remain open to examination by the major taxing jurisdictions in which the Company operates. The Company is not certain, thecurrently under audit in any major taxing jurisdiction.

        The Company does not expectbelieves it is reasonably possible that the gross unrecognized tax benefits to materially changewill not decrease in the next 12 months.

17.18. Segment Information

        The Company has one operating segment, mixed-signal analog intensive products, consisting of numerous product areas. The Company's chief operating decision maker is considered to be its Chief Executive Officer. The chief operating decision maker allocates resources and assesses performance of the business and other activities at the operating segment level.

        The Company groups its products into four categories, based on the markets and applications in which its ICsthe products may be used. The following summarizesSee Note 13,Revenues, for a summary of the Company's revenue by product category (in thousands):category.

 
 Year Ended 
 
 December 31,
2016
 January 2,
2016
 January 3,
2015
 

Internet of Things

 $314,614 $262,329 $209,005 

Broadcast

  157,746  161,787  204,256 

Infrastructure

  147,677  121,974  108,123 

Access

  77,589  98,736  99,320 

Total

 $697,626 $644,826 $620,704 

        Revenue is attributed to a geographic area based on the shipped-to location. The following summarizes the Company's revenue by geographic area (in thousands):


 Year Ended  Year Ended 

 December 31,
2016
 January 2,
2016
 January 3,
2015
  December 29,
2018
 December 30,
2017
 December 31,
2016
 

United States

 $94,583 $96,959 $89,935  $149,385 $112,574 $94,583 

China

 291,974 281,306 271,818  344,255 307,748 291,974 

Rest of world

 311,069 266,561 258,951  374,627 348,545 311,069 
���

Total

 $697,626 $644,826 $620,704  $868,267 $768,867 $697,626 

        The following summarizes the Company's property and equipment, net by geographic area (in thousands):


 December 31,
2016
 January 2,
2016
  December 29,
2018
 December 30,
2017
 

United States

 $124,163 $126,404  $128,622 $119,746 

Rest of world

 5,396 4,728  10,427 7,936 

Total

 $129,559 $131,132  $139,049 $127,682 

Table of Contents


Silicon Laboratories Inc.
Notes to Consolidated Financial Statements
December 31, 2016 (Continued)

18. Subsequent Event

Acquisition

        On January 20, 2017, the Company acquired Zentri, Inc., a private company. Zentri is an innovator in low-power, cloud-connected Wi-Fi technologies for the IoT. The Company acquired Zentri for: 1) initial cash consideration of $15.5 million adjusted for an amount equal to: a) certain Zentri liabilities as of the closing date, b) Zentri transaction expenses, and c) the aggregate exercise price of all vested options for which the per common share closing consideration exceeds the per share exercise price for such vested options, and 2) potential additional consideration of up to approximately $10.0 million payable based on fiscal 2017 revenue from certain Zentri products.

        The Company will record the purchase of Zentri using the acquisition method of accounting and will recognize the assets acquired and liabilities assumed at their fair values as of the date of the acquisition. The results of Zentri's operations will be included in the Company's consolidated results of operations beginning on the date of the acquisition.

        The Company is currently evaluating the fair values of the consideration transferred, assets acquired and liabilities assumed. The Company expects to complete its initial purchase price allocation in the first quarter of fiscal 2017.


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Supplementary Financial Information (Unaudited)

        Quarterly financial information for fiscal 20162018 and 20152017 is as follows. All quarterly periods reported here had 13 weeks (in thousands, except per share amounts):


 Fiscal 2016  Fiscal 2018 

 Fourth
Quarter
 Third
Quarter
 Second
Quarter
 First
Quarter
  Fourth
Quarter
 Third
Quarter
 Second
Quarter
 First
Quarter
 

Revenues

 $182,610 $178,083 $174,908 $162,025  $215,534 $230,243 $217,106 $205,384 

Gross margin

 109,476 108,203 108,294 95,531  130,243 135,627 131,292 124,237 

Operating income

 20,083 21,732 17,614 6,848  18,362 25,130 18,001 23,715 

Net income

 $20,109 $20,018 $15,559 $5,808  $15,145 $27,761 $14,280 $26,405 

Earnings per share:

 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 

Basic

 $0.48 $0.48 $0.37 $0.14  $0.35 $0.64 $0.33 $0.61 

Diluted

 $0.47 $0.47 $0.37 $0.14  $0.35 $0.63 $0.32 $0.60 

 


 Fiscal 2015  Fiscal 2017 

 Fourth
Quarter
 Third
Quarter
 Second
Quarter
 First
Quarter
  Fourth
Quarter
 Third
Quarter
 Second
Quarter
 First
Quarter
 

Revenues

 $160,071 $156,194 $164,856 $163,705  $201,018 $198,723 $190,098 $179,028 

Gross margin

 93,538 93,435 97,428 96,369  119,264 116,574 113,192 105,161 

Operating income

 4,796 11,223 9,003 7,212  26,390 24,968 20,934 12,682 

Net income

 $5,658 $9,975 $7,575 $6,378 

Earnings per share:

 
 
 
 
 
 
 
 
 

Net income (loss)

 $(4,852)$19,949 $16,569 $15,426 

Earnings (loss) per share:

 
 
 
 
 
 
 
 
 

Basic

 $0.14 $0.24 $0.18 $0.15  $(0.11)$0.47 $0.39 $0.37 

Diluted

 $0.13 $0.23 $0.17 $0.15  $(0.11)$0.46 $0.38 $0.36