Harmonic Inc. Annual Report 2010

FY2010 Annual Report · Harmonic Inc.

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2010 Annual Report

TO OUR STOCKHOLDERS

2010 marked a record year for Harmonic, with the continued expansion of HD services, new multi-screen
video services and a growing international pay television market all contributing to the company’s strong
performance. These trends are rapidly changing the way in which viewers consume video, and changing how
media companies produce and deliver video services. It’s a new video economy, and Harmonic is committed to
being at the technology forefront with solutions that enable our customers to successfully meet the ever-increasing
demand for video.

One way in which Harmonic strengthened its position during the year was through the September acquisition
of Omneon Inc., a leading provider of production, playout and video storage solutions. This combination makes
Harmonic unique as a global video infrastructure leader with a broad range of solutions spanning content
production to delivery.

Our continued focus on profitability and prudent operational management also helped ensure robust financial
performance in 2010. We continued to expand our international sales, and Omneon’s international reach and
extensive customer base further diversified our business. Today, each of the top 20 Fortune 2000 media companies
relies on Harmonic to power various components of their video infrastructures.

Key Harmonic products achieved significant milestones during the year, including 15,000 channels shipped
for the Electra» 8000 encoder and 1,000,000 NSGTM QAM channels shipped. Harmonic also supported a variety of
important events around the world in 2010 — our video processing systems were used to broadcast the 2010 FIFA
World Cup and Asian Games, while Omneon and Rhozet technologies helped bring the action to people around the
world for the Vancouver Olympic Winter Games.

As we look to 2011, mobile, over-the-top and Internet video are strategic areas of investment for our customers
around the world, and for Harmonic. We continue to increase our investment in R&D, with more than 450 video-
focused engineers and more than $100 million committed to developing the next generation of world-class video
infrastructure products. We are the only company in the industry with a pure video focus — our mission is to help
content creators and service providers efficiently create, prepare and deliver content in the rapidly increasing variety
of formats required to serve content anytime, anywhere.

We believe that this singular focus on video technology positions us well in what continues to be a very
competitive and quickly evolving marketplace. Global uptake of high definition, 3D and mobile video continues to
accelerate, and we expect to see more growth over the coming year. I personally am very excited about the
opportunities that lie ahead in this multi-screen video economy, and what it offers in terms of potential for
Harmonic. I look forward to working closely with my fellow employees and our valued customers and partners to
continue driving innovation and success.

Sincerely,

Patrick J. Harshman
President & CEO

Forward-Looking Statements

The President’s Letter on the previous page contains forward-looking statements within the meaning of
Section 27A of the Securities Act of 1933 and Section 21E of the Securities and Exchange Act of 1934, each as
amended, including statements related to: Harmonic’s commitment with respect to being at the technology
forefront; the Company’s strategic areas of investment; the projected amount of the Company’s research and
development expenditures and its commitment to product development; a statement of the Company’s mission; how
the Company’s focus positions it; expected growth of the Company; the Company’s opportunities and potential; the
Company working to continue driving innovation and success; and trends in HD and multi-screen video services.
Our expectations and beliefs regarding these matters may not materialize, and actual results in future periods are
subject to risks and uncertainties that could cause actual results to differ materially from those projected. Important
factors that may cause actual results to differ from such expectations include those discussed in “Risk Factors”
beginning on page 19 of the Company’s Annual Report on Form 10-K, which follows the President’s Letter, and its
Current Reports on Form 8-K. The forward looking statements in the President’s Letter are based on information
available to Harmonic as of the date hereof, and the Company disclaims any obligations to update any forward-
looking statements.

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

Form 10-K

(Mark One)
¥

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the Fiscal Year Ended December 31, 2010
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File No. 000-25826

HARMONIC INC.

(Exact name of Registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)

77-0201147
(I.R.S. Employer
Identification Number)

4300 North First Street
San Jose, CA 95134
(408) 542-2500
(Address, including zip code, and telephone number, including area code, of Registrant’s principal executive offices)
Securities registered pursuant to section 12(b) of the Act:

Title of Each Class

Name of Each Exchange on Which Registered

Common Stock, par value $.001 per share

NASDAQ Global Market

Securities registered pursuant to section 12(g) of the Act:
Preferred Share Purchase Rights

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities

Act. Yes n

No ¥

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Exchange

Act. Yes n

No ¥

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities
Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports),
and (2) has been subject to such filing requirements for the past 90 days. Yes ¥

No n

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every
Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or
for such shorter period that the Registrant was required to submit and post such files). Yes ¥

No n

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will
not be contained, to the best of 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. Yes n

No ¥

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller
reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2
of the Exchange Act. (Check one):

Large accelerated filer ¥

Accelerated filer n

Non-accelerated filer n

Smaller reporting company n

(Do not check if a smaller reporting company)

Indicate by check mark whether the Registrant

is a shell company (as defined in Rule 12b-2 of the Exchange

Act). Yes n

No ¥

Based on the closing sale price of the Common Stock on the NASDAQ Global Market on July 2, 2010, the aggregate market
value of the voting Common Stock held by non-affiliates of the Registrant was $500,999,923. Shares of Common Stock held by each
executive officer and director and by each person who owns 5% or more of the outstanding Common Stock have been excluded in that
such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for
other purposes.

The number of shares outstanding of the Registrant’s Common Stock, $.001 par value, was 113,873,904 on February 11, 2011.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Proxy Statement for the Registrant’s 2011 Annual Meeting of Stockholders (which will be filed with the
Securities and Exchange Commission within 120 days of the end of the fiscal year ended December 31, 2010) are incorporated by
reference in Part III of this Annual Report on Form 10-K.

HARMONIC INC.

FORM 10-K

TABLE OF CONTENTS

PART I

ITEM 1
BUSINESS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 1A RISK FACTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 1B UNRESOLVED STAFF COMMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PROPERTIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 2
LEGAL PROCEEDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 3

PART II

ITEM 5 MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCK HOLDER

MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES . . . . . . . . . . . . . . . .
SELECTED FINANCIAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 6
ITEM 7 MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
RESULTS OF OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 7A QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK . . . . .
FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA . . . . . . . . . . . . . . . . . . . . .
ITEM 8
CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING
ITEM 9
AND FINANCIAL DISCLOSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 9A CONTROLS AND PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 9B OTHER INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PART III

ITEM 10 DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE . . . . . . . . .
ITEM 11 EXECUTIVE COMPENSATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ITEM 12

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND
MANAGEMENT AND RELATED STOCKHOLDER MATTERS . . . . . . . . . . . . . . . . . . .

ITEM 13 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR

ITEM 14

INDEPENDENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRINCIPAL ACCOUNTANT FEES AND SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 15 EXHIBITS AND FINANCIAL STATEMENT SCHEDULES . . . . . . . . . . . . . . . . . . . . . . .
SIGNATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXHIBIT INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PART VI

Page

4
16
36
36
36

38
40

41
57
58

100
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100
101

101

101
101

101
102
103

Forward Looking Statements

Some of the statements contained in this Annual Report on Form 10-K are forward-looking statements that
involve risk and uncertainties. The statements contained in this Annual Report on Form 10-K that are not purely
historical are 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, including, without limitation,
statements regarding our expectations, beliefs, intentions or strategies regarding the future. In some cases, you can
identify forward-looking statements by terminology such as, “may,” “will,” “should,” “expects,” “plans,” “antic-
ipates,” “believes,” “intends,” “estimates,” “predicts,” “potential,” or “continue” or the negative of these terms or
other comparable terminology. These forward-looking statements include, but are not limited to, statements
regarding:

(cid:129) developing trends in the broadcasting and television business;

(cid:129) new and future products and services;

(cid:129) capital spending of our customers in 2011;

(cid:129) our strategic direction, future business plans and growth strategy;

(cid:129) industry and customer consolidation;

(cid:129) anticipated changes in economic conditions or the financial markets, and the potential impact on our

business, results of operations, financial condition and cash flows;

(cid:129) the expected demand for and benefits of our products and services;

(cid:129) seasonality of revenue and concentration of revenue sources;

(cid:129) anticipated benefits of recent acquisitions;

(cid:129) potential future acquisitions;

(cid:129) statements regarding anticipated results of potential or actual litigation;

(cid:129) our competitive environment;

(cid:129) the impact of governmental regulation;

(cid:129) the impact of uncertain economic times and markets;

(cid:129) anticipated revenue and expenses, including the sources of such revenue and expenses;

(cid:129) expected impacts of changes in accounting rules;

(cid:129) use of cash, cash needs and ability to raise capital; and

(cid:129) the condition of our cash investments.

These statements are subject to known and unknown risks, uncertainties and other factors, which may cause
our actual results to differ materially from those implied by the forward-looking statements. Important factors that
may cause actual results to differ from expectations include those discussed in “Risk Factors” beginning on page 19
in this Annual Report on Form 10-K. All forward-looking statements included in this Annual Report on Form 10-K
are based on information available to us on the date thereof, and we assume no obligation to update any such
forward-looking statements. The terms “Harmonic,” the “Company,” “we,” “us,” “its,” and “our”, as used in this
Annual Report on Form 10-K, refer to Harmonic Inc. and its subsidiaries and its predecessors as a combined entity,
except where the context requires otherwise.

PART I

Item 1. Business

OVERVIEW

We design, manufacture and sell versatile and high performance video infrastructure products and system
solutions that enable our customers to efficiently create, prepare and deliver broadcast and on-demand video
services to televisions, personal computers, or PCs, and mobile devices. Historically, the majority of our sales have
been derived from sales of video processing solutions and network edge and access systems to cable television
operators and from sales of video processing solutions to direct-to-home satellite operators. More recently, we are
providing our video processing solutions to telecommunications companies, or telcos, broadcasters and other media
companies that create video programming or offer video services. In September 2010, we acquired Omneon, Inc., a
private, venture-backed company specializing in file-based infrastructure for the production, preparation and
playout of video content typically deployed by broadcasters, satellite operators, content owners and other media
companies. The acquisition of Omneon is complementary to Harmonic’s core business, expanding our customer
reach into content providers and extending our product lines into video servers and video-optimized storage for
content production and playout.

INDUSTRY OVERVIEW

Demand for Video Services

The delivery of television programming and Internet-based information and communication services to
consumers is converging, driven by changes in consumer lifestyles, advances in technology and by changes in the
regulatory and competitive environments. Viewers of video increasingly seek a more personalized and dynamic
video experience that can be delivered to a variety of devices, ranging from widescreen high-definition televisions,
or HDTVs, to mobile devices, including “smart” phones. In part driven by the growth in video consumption devices,
the demand for video content has also increased, putting pressure on content providers to cost-effectively produce
more high-quality content and make it available on as many platforms as possible. Today, there are a number of
developing trends which impact the broadcasting and television business and that of our customers who originate
and deliver video programming. These trends distinctly impact both service providers and content providers in
unique ways.

Service Provider Trends

Service providers face increasing competition for consumers of video content and are moving quickly to
provide a more personalized, on-demand video experience to consumers. Consumers want to view video content at
any time, from any location and on any device. Service providers face intense pressure to satisfy these demands, and
they see a number of trends, including the following, driving their business:

On-Demand Services

The expanding use of digital video recorders and network-based video on demand, or VOD, services is leading
to changes in the way subscribers watch television programming in the home. Subscribers are increasingly utilizing
“time-shifting” and “ad-skipping” technology. Further advances in technology are accelerating these trends, with
cable, satellite and telco operators announcing initiatives, often in conjunction with network broadcasters, to
increasingly personalize subscribers’ video viewing experience, including the delivery of programming directly to
broadband enabled TV sets, computers and mobile devices, in addition to conventional television sets.

High-Definition Television

The increasing popularity of HDTV and home theater equipment is putting competitive pressure on broad-
casters and pay-TV providers to offer additional HDTV content and higher quality video signals for both standard
and high definition services, including initiatives to broadcast in the 1080p standard of HDTV and, more recently,

3D. At the end of 2010, both of the major U.S. direct broadcast satellite, or DBS, operators and multiple major cable
system operators were offering hundreds of national and local HD channels to their subscribers across the country.

The Internet and Other Video Distribution Methods

Several companies, including Google, Apple, Hulu, and Netflix, as well as traditional broadcasters such as
NBC and ESPN, now enable their customers to stream video content to PCs and mobile devices. Devices that link
broadband connections and PCs to the television set are gaining in popularity. We believe that the delivery of video
over the Internet will continue to change traditional video viewing habits and distribution methods and also
potentially alter the traditional subscription business model of the major pay-TV service providers.

Mobile Video

Many telcos and other providers in the U.S. and abroad have launched both broadcast and on-demand video
services to cellular telephones and other mobile devices. Certain cable operators have entered into agreements with
mobile phone operators that are likely to lead to further expansion of mobile video services. These trends are
expected to increase the demand from service providers for sophisticated and versatile digital video storage and
processing systems, which are required to acquire video content from a variety of sources and deliver it to the
subscriber on several different devices in several different formats.

Content Provider Trends

As the number of video consumption platforms increase and service provider competition creates more
opportunities to reach consumers, content providers are facing increasing demands for more content and in many
more formats. The process of producing and preparing content for multi-screen delivery means that content
providers must become more efficient to keep up with demand. At the same time, content providers realize that their
ownership of content rights gives them market power, with many content providers now looking at launching their
own content distribution initiatives to reach consumers directly. Impacting content providers are several important
trends, including:

Demand for High-Quality HD Content

With service providers adding more HD channels and consumers viewing HD television content on ever-larger
screens and home theater environments, the demand for more and higher-quality HD programming continues to
escalate. From sports to news to episodic to movies, content providers face increasing pressure to deliver the highest
quality HD programming across all types of programming, driving an accelerating transition from SD to HD.

Content Format Proliferation

As service providers seek to deliver more video services to more devices and platforms, they are increasingly
requiring content providers to supply content that is properly formatted for each device. With the number of devices
continuing to grow, lack of consistent video standards mean that content providers must reformat and package their
content in dozens of different formats so that their content is viewable across all of these different devices.

Fragmentation of Revenue Sources

As consumers divide their viewing across a wider range of devices, the revenues associated with content
correspondingly are divided across all of the different viewing outlets. While total content revenues, either from
advertising or subscription fees, may remain stable or even increase, the amount of total revenue available to
support any particular format or viewing platform may decrease, causing content providers to become more
efficient and cost-effective in the production and packaging of their content.

Move to File-Based Workflows

From newsrooms to Hollywood studios, there has been a growing shift from traditional tape-based acquisition
and production to a more file-based workflow, where video content is captured, compressed, stored and edited as a

file residing in a storage system. The move to video file-based production streamlines the production process
because content can be more readily shared across multiple production applications and various media processing
tasks can be performed on stored content in a “faster-than-real-time” manner.

These trends are driving content providers to invest in video file infrastructure that will help them produce
more content, faster and more cost-effectively, with server and storage solutions that will enable them to provide
content in the widest possible range of formats and at the highest possible quality.

The Market Opportunity

Personalized video services, such as VOD, and the increasing amounts of high definition content, as well as an
expanding amount of video transmitted over Internet connections, pose challenges to both content producers and
service providers. For content producers, the increase in high-quality video consumption across these new services
requires high-performance, reliable video production, transcoding and playout infrastructure in order to support the
increased production and playout workload. Existing tape-based operations are inadequate for keeping up with the
fast-paced demands for new content, new channels and new formats for video content. File-based production
storage, high-throughput media transformation and server-based playout enable content producers to meet these
growing demands.

For service providers, providing access to all these new forms of content requires more sophisticated video
processing capabilities and greater bandwidth to the home in order to deliver maximum choice and flexibility to the
subscriber. In addition, the delivery of live television and downloadable content to cellular telephones and other
mobile devices creates bandwidth constraints and network management challenges. The demand for more
bandwidth-intensive video, voice and data content has strained existing communications networks, especially
where video is received and processed, and in the “last mile” of the communications infrastructure, where homes
connect to the local network. The upgrade and extension of existing processing capabilities and distribution
networks, or the construction of completely new environments to facilitate the processing and delivery of high-
speed broadband video, voice and data services, requires substantial expenditures and often the replacement of
significant portions of the existing infrastructure. As a result, service providers are seeking solutions that maximize
the efficiency of existing available bandwidth and cost-effectively manage and transport digital traffic within
networks, while minimizing the need to construct new networks for the distribution of video, voice and data content.

Competition and Deregulation

Competition for traditional service providers in the cable and satellite markets has intensified as offerings from
non-traditional providers of video, such as telcos, new media companies and mobile operators, are beginning to
attract customers. The economic success of existing and new service providers in this increasingly competitive
environment will depend, to a large extent, on their ability to provide a broad range of offerings that package video,
voice and data services for subscribers. These services all need to be delivered in a highly reliable manner with easy
access to a service provider’s network. This increasingly competitive environment led to higher capital spending by
many of the market participants in 2007 and 2008, in an effort to deploy attractive packages of services and to
capture and retain high revenue-generating subscribers. However, capital spending declined significantly in 2009 in
response to the global economic slowdown, generally returning to more normal levels in 2010.

Similar competitive factors and the liberalization of regulatory regimes in foreign countries have led to the
establishment abroad of new or expanded cable television networks, the launch of new DBS services and the entry
of telephone companies into the business of providing video services. Pay-TV services have recently seen
significant investments in emerging markets due to deregulation, consolidation of operators, and growing
disposable incomes.

We expect competition among our customers to remain intense and pay-TV services to continue to grow in
2011, particularly in the U.S. and in most other developed countries. Accordingly, we anticipate that capital
spending by most of our domestic and international customers in developed countries will continue at normal levels,
or increase, in 2011. Although the adverse impact of recent global economic conditions and tight credit markets on
customers in a few developed countries and in some emerging market countries may persist in 2011, we expect that
capital spending by many of those customers are likely to continue at normal levels, or, increase, in 2011.

Our Cable Market

To address increasing competition and demand for high-speed broadband services, cable operators have
widely introduced digital video, voice and data services. By offering bundled packages of broadband services, cable
operators seek to obtain a competitive advantage over telephone companies and DBS providers and to create
additional revenue streams. More recently, cable operators have been introducing services that enable their
subscribers to access programming for which they are authorized on computers and mobile devices. These services
are intended to attract and retain subscribers who may otherwise choose to download and watch video programming
from alternative providers on the Internet.

Cable operators have upgraded their facilities and networks to offer digital video, which enables them to
provide more channels and better picture quality than analog video, allowing them to better compete against the
substantial penetration of DBS services. These upgrades to digital video also allow cable operators to offer HDTV
and interactive services, such as VOD, on their digital platforms. Capital spending on upgrades includes investment
in digital video equipment that can receive, process and distribute content from a variety of sources in increasingly
complex facilities. For example, VOD services require video storage equipment and servers and systems to ingest,
store and intelligently distribute increasing amounts of content, complemented by edge devices capable of routing,
multiplexing and modulating in order to deliver signals to individual subscribers over a hybrid fiber-coaxial, or
HFC, network.

Many cable operators are now conducting trials of delivery of similar services to PCs and mobile devices.
Additionally, the provision of HDTV channels requires deployment of high-definition encoders and significantly
more available bandwidth than the equivalent number of standard definition channels. In order to provide more
bandwidth for such services, operators are adopting bandwidth optimization techniques, such as switched digital
video, and making enhancements to their optical networks, including the segmentation of nodes and the extension
of bandwidth from 750 MHz to up to 1 GHz.

Our Satellite Market

Over 100 satellite operators around the world have established digital television services that serve tens of
millions of subscribers. These services are capable of providing up to several hundred channels of high quality
standard definition video, as well as increasing numbers of high definition channels. DBS services, however,
operate mostly in a one-way environment. Signals are transmitted from an uplink center to a satellite and then
beamed to dishes located at subscribers’ homes. This method is suited to the delivery of broadcast television, but
does not allow two-way services, such as Internet access or VOD.

As cable operators expand the number of channels offered and introduce services such as VOD and HDTV,
DBS providers are seeking to protect and expand their subscriber base in a number of ways. Domestic DBS
operators have made local channels available in all major markets in standard definition format and offer local
channels in high definition in most markets. Continuing advances in digital video compression technology allow
DBS operators to cost-effectively add these new channels and to further expand their video entertainment offerings.

Certain DBS operators have also entered into partnerships with, or have acquired, companies that provide
terrestrial broadband services, thereby allowing them to introduce two-way services, such as VOD and high-speed
data, which are delivered over the broadband connections. The new services, particularly HDTV, pose continuing
bandwidth challenges and are expected to require ongoing capital expenditures for satellite capacity and other
infrastructure by such operators. Like their cable competitors, DBS companies have made acquisitions or
introduced technologies that allow their subscribers to access certain programming on PCs and mobile devices.

Our Telco Market

Telcos are also facing increasing competition and demand for high-speed residential broadband services, as
well as saturation of fixed-line and basic mobile services. Consequently, many telcos around the world have added
video services as a competitive response to cable and satellite operators and as a potential source of revenue growth.
However, the telcos’ legacy networks are not well equipped to offer video services. The bandwidth and distance
limitations of the copper-based “last mile” present difficulties in providing multiple video services to widespread

geographic areas. Multi-channel video, especially HDTV, delivered over DSL lines has significant bandwidth
constraints, but the use of video compression technology at very low bit rates and improvements in DSL technology
have allowed many operators to introduce competitive video services using Internet Protocol, or IPTV. A few
operators, including Verizon, are building out fiber networks to homes, enabling the delivery of hundreds of video
channels, as well as very high speed delivery of data. Because of increases in network capacity and the growing
capabilities of “smart phones,” many major telcos around the world now offer a variety of mobile video services to
their subscribers.

Our Broadcast Markets

In the terrestrial broadcasting market, operators in many countries are now required by regulation to convert
from analog to digital transmission in order to free up broadcast spectrum. The conversion to digital transmission
often provides the opportunity to deliver new services, such as HDTVand data transmission. These broadcasters are
faced with requirements similar to those of cable and satellite providers, in that they need to convert analog signals
to digital signals prior to transmission over the air and must also effectively manage the available bandwidth to
maximize their revenue streams.

Network broadcasters and other programmers need to transmit live programming of news and sports to their
studios and to subsequently broadcast their content and to deliver their content to cable, satellite and telco operators
for distribution to their subscribers. These broadcasters generally produce their own news and sports highlight
content, along with hundreds of channels of network programming that needs to be played to air under strict
reliability requirements. Our acquisition of Omneon allows us to much more directly address the needs of the
broadcast market and, in particular, content production and channel playout operations.

Other Markets

We are addressing video processing opportunities with a variety of video content owners and aggregators,
some of which distribute video via traditional television channels or over the Internet and many of which use both
methods of distribution. Our past acquisitions and our recent acquisition of Omneon have provided us with products
and solutions that allow us to offer broader solutions and products to this group of customers, including the ability to
process video content into appropriate formats and the ability to then deliver the content to distributors or directly to
consumers.

Current Industry Conditions

The telco and media industries have seen considerable restructuring and consolidation in recent years. For

example:

(cid:129) In 2010, BCE, the parent of Bell Canada, agreed to purchase full control of CTV, Inc., a Canadian television

network, subject to regulatory approval.

(cid:129) In 2010, Shaw Communications, a Canadian provider of telecommunications services, acquired CanWest

Global Communications, a Canadian media content provider.

(cid:129) In 2009, Comcast announced its intention to purchase a controlling interest in NBC Universal, ultimately

closing the purchase in early 2011.

Regulatory issues, financial concerns and business combinations among our customers are likely to signif-
icantly affect the industries we address, capital spending plans of our existing and potential customers, and our
business for the foreseeable future.

Most of our existing U.S. customers and international customers appear to have increased their capital
expenditures in 2010 to normal levels, after having reduced such expenditures in 2009 in response to the global
economic slowdown. The slowdown may have led some of our U.S. customers and international customers to
continue to be cautious about capital expenditures in 2010. We believe that the lingering effects of the global
economic slowdown caused those customers to reduce or delay orders for our products during the year. In addition,
many of our international customers in emerging market countries and in some developed countries were exposed to

tight credit markets and depreciating currencies in 2010, further restricting their ability to invest in building out or
upgrading their networks. However, we believe it is likely that those lingering effects will substantially dissipate for
most of our customers in 2011, and their capital expenditures may increase.

PRODUCTS

Harmonic’s products generally fall into three principal categories: video production platforms and playout
solutions, video processing solutions and edge and access products. We also provide technical support services and
professional services to our customers worldwide. Our video production platforms consist of video-optimized
storage and content management applications that provide content companies with file-based infrastructure to
support video content production activities, such as editing, post-production and finishing. Our playout solutions
are based on scalable video servers used by content owners and multi-channel operators for assembly and playout of
one or more television channels. Our video processing solutions, which include network management software and
application software products, provide broadband operators with the ability to acquire a variety of signals from
different sources and in different protocols in order to deliver a variety of real-time and stored content to their
subscribers. Many of our customers also use these products to organize, manage and distribute content in ways that
maximize use of the available bandwidth. Our edge products enable cable operators to deliver customized broadcast
or narrowcast on- demand and data services to their subscribers. Our access products, which consist mainly of
optical transmission products, node platforms and return path products, allow cable operators to deliver video, data
and voice services over their distribution networks.

Video Production Platforms and Playout Solutions

Video servers. The Omneon Spectrum and MediaDeck video server products are used by broadcasters,
content owners and multi-channel network operators to create and play-to-air television channels. Our servers
support both standard and high definition programming, as well as many different media formats, such as MPEG-2,
DV and AVC-Intra, using both QuickTime and MXF media wrapper formats. Typically our customers use our
servers to record incoming content from either live feeds or from tapes, encoding that content in real-time into
standard media files that are stored in the server’s file system until the content is needed for playback as part of a
scheduled playlist. Clips stored in the server are decoded in real-time and played to air according to a playout
schedule in a frame-accurate, back-to-back manner to create a seamless television channel.

Video-optimized storage. The Omneon MediaGrid active storage system is a scale-out, network-attached
storage system with a built-in media file system that has been optimized for typical read and write file operations
found in media production workflows. Architected as a clustered storage system with a distributed file system,
MediaGrid provides highly scalable storage capacity and access bandwidth to support demanding media production
applications, such as video editing, content transformation and media library management.

Media Applications. Complementing our server and storage platforms, our Media Application Server
(MAS), combined with a suite of integrated applications, including ProXplore, ProBrowse and ProXchange,
provides a basic level of integrated media management and workflow control over content stored across our
systems. For more complex media management, our underlying API, called Media Services Framework, allow both
customers and other application developers to build advanced media management applications that can automate
many media processing and movement tasks, collect and organize content metadata, and provide search and review
functionality.

Video Processing Solutions

Broadcast encoders. Our Electra and Ion high performance encoders compress video, audio and data
channels to low bit rates, while maintaining high video quality. Our encoders are available in standard and high
definition formats in both MPEG-2 and the newer MPEG-4 AVC/H.264, or MPEG-4, video compression standards.
Our Electra 8000 encoder supports all of these formats on the same hardware platform. Compliance with these
widely adopted standards enables interoperability with products manufactured by other companies, such as set-top
boxes and conditional access systems. Most of these encoders are used in real-time broadcasting applications, but

they are also employed in conjunction with our software in encoding of video content and storage for later delivery
as VOD.

Contribution and distribution encoders. Our Ellipse encoders provide broadcasters with video compression
solutions for on-the-spot news gathering, live sports coverage and other remote events. These products enable our
customers to deliver these feeds to their studios for further processing. Broadcasters and other operators, such as
teleports, also use these encoders for delivery of their programming to their customers, typically cable, telco and
DBS operators.

Stream processing and statistical multiplexing solutions. Our ProStream platform and other stream pro-
cessing products offer our customers a variety of capabilities that enable them to manage and organize digital
streams in a format best suited to their particular delivery requirements and subscriber offerings. Our multi-function
ProStream 1000 addresses multiplexing, encryption, ad insertion and other advanced processing requirements of
MPEG video streams and can be integrated with our DiviTrackIP statistical multiplexer, which enhances the
bandwidth efficiency of our encoders by allowing bandwidth to be dynamically allocated according to the
complexity of the video content. DiviTrackIP also enables operators to combine inputs from different physical
locations into a single multiplex.

Content preparation and delivery for multi-screen applications. We offer a variety of content preparation,
storage and delivery solutions that enable high-quality broadcast and on-demand video services on any device (TV,
PC or mobile). Our ProStream 4000 real-time multi-screen transcoder, file-based transcoding products and
workflow management software products facilitate content preparation in any format, while the Omneon
MediaGrid active storage system provides scalable, high performance network-attached storage to store growing
libraries of content. Our multi-screen solutions are used for a variety of applications, including live streaming,
VOD, catch-up TV, start-over TV, network PVR through HTTP streaming, and multi-bitrate adaptive HTTP
streaming.

Decoders and descramblers. We provide our ProView integrated receivers-decoders to allow service
providers to acquire content delivered from satellite and terrestrial broadcasters for distribution to their subscribers.
These products are available in both standard and high definition formats. The ProStream 1000 can also be used as a
bulk descrambler to enable operators to deliver up to 128 channels of video and efficiently descramble the content at
small or remote headends.

Management and control software. Our NMX Digital Service Manager gives service providers the ability to
control and visually monitor their digital video infrastructure at an aggregate level, rather than as just discrete pieces
of hardware, thereby reducing their operational costs. Our NETWatch management system operates in broadband
networks to capture measurement data and our software enables the broadband service operator to monitor and
control the HFC transmission network from a master headend or remote locations. Our NMX Digital Service
Manager and NETWatch software is designed to be integrated into larger network management systems through the
use of simple network management protocol, or SNMP.

Edge and Access Products

Edge products. Our Narrowcast Services Gateway family, or NSG, is a fully integrated edge gateway that
integrates routing, multiplexing and modulation into a single package for the delivery of narrowcast services to
subscribers over cable networks. An NSG is usually supplied with Gigabit Ethernet inputs, allowing the cable
operator to use bandwidth efficiently by delivering IP signals from the headend to the edge of the network for
subsequent modulation onto the HFC network. Originally developed for VOD applications, our most recent NSG
product, the high-density, multi-function NSG 9000, may also be used in switched digital video and modular Cable
Modem Termination Systems, or M-CMTS, applications, as well as large-scale VOD deployments.

Optical transmitters and amplifiers. Our family of optical transmitters and amplifiers operates at various
optical wavelengths and serves both long-haul and local transport applications in the cable distribution network.
The PWRLink series provides optical transmission primarily at a headend or hub for local distribution to optical
nodes and for narrowcasting, which is the transmission of programming to a select set of subscribers. Our
METROLink Dense Wave Division Multiplexing, or DWDM, system allows operators to expand the capacity of a

single strand of fiber and to provide narrowcast services directly from the headend to nodes. We also offer
SupraLink, a transmitter which allows deeper deployment of optical nodes in the network and minimizes the
significant capital and labor expense associated with deploying additional optical fiber.

Optical nodes and return path equipment. Our family of PWRBlazer optical nodes supports network
architectures that meet the varying demands for bandwidth delivered to a service area. By the addition of modules
providing functions such as return path transmission and DWDM, our configurable nodes are easily segmented to
handle increasing two-way traffic over a fiber network without major reconstruction or replacement of our
customers’ networks. Our return path transmitters support two-way transmission capabilities by sending video,
voice and data signals from the optical node back to the headend. These transmitters are available for either analog
or digital transport.

Technical Support and Professional Services

We provide maintenance and support services to most of our customers under service level agreements which
are generally renewed on an annual basis. We also provide consulting, implementation and integration services to
our customers worldwide. We draw upon our expertise in broadcast television, communications networking and
compression technology to design, integrate and install complete solutions for our customers, including integration
with third-party products and services. We offer a broad range of services, including program management, budget
analysis, technical design and planning, parts inventory management, building and site preparation, integration and
equipment installation, end-to-end system testing, and comprehensive training.

CUSTOMERS

We sell our products to a variety of cable, satellite and telco, and broadcast and media companies. Set forth
below is a representative list of our significant end user and integrator/distributor customers, based on revenue
during 2010.

United States
Cablevision Systems
Charter Communications
Comcast Cable
Cox Communications
DirecTV
EchoStar Holdings
Time Warner

International

Alcatel Lucent
Bell Expressvu
Capella Telecommunications
Huawei Technologies
Impeq Technologies
Nokia Siemens Networks
Rogers Communications

Historically, a majority of our revenue has been derived from relatively few customers, due in part to the
consolidation of the ownership of cable television and direct broadcast satellite system companies. However, in the
last two years, revenue from our ten largest customers has decreased as a percentage of revenue, due to our growing
customer base, in part as a result of the acquisition of Scopus and Omneon. Sales to our ten largest customers in
2010, 2009 and 2008 accounted for approximately 44%, 47% and 58% of revenue, respectively. Although we are
attempting to broaden our customer base by penetrating new markets and further expanding internationally, we
expect to see continuing industry consolidation and customer concentration.

During 2010, 2009 and 2008, revenue from Comcast accounted for 17%, 16% and 20%, respectively, of our
revenue. Sales to EchoStar accounted for 12% of revenue in 2008. The loss of Comcast or any other significant
customer, any material reduction in orders by Comcast or any significant customer, or our failure to qualify our new
products with a significant customer could materially and adversely affect our operating results, financial condition
and cash flows. In addition, we are involved in most quarters in one or more relatively large individual transactions,
including, from time to time, projects in which we act much like a systems integrator. A decrease in the number of
the relatively larger individual transactions in which we are involved in any quarter could adversely affect our
operating results for that quarter.

SALES AND MARKETING

In the U.S. we sell our products through our own direct sales force, as well as through independent distributors
and integrators. Our direct sales team is organized geographically and by major customers and markets to support
customer requirements. We sell to international customers through our own direct sales force as well as through
independent distributors and integrators. Our principal sales offices outside of the U.S. are located in Europe and
Asia, and we have an international support center in Switzerland to support our international customers. Inter-
national distributors are generally responsible for importing our products and providing certain installation,
technical support and other services to customers in their territory. Our direct sales force and distributors are
supported by a highly trained technical staff, which includes application engineers who work closely with operators
to develop technical proposals and design systems to optimize system performance and economic benefits to
operators. Technical support provides a customized set of services, as required, for ongoing maintenance,
support-on-demand and training for our customers and distributors, both in our facilities and on-site.

Our marketing organization develops strategies for product lines and markets and, in conjunction with our
sales force, identifies the evolving technical and application needs of customers so that our product development
resources can be most effectively and efficiently deployed to meet anticipated product requirements. Our marketing
organization is also responsible for setting price levels, demand forecasting and general support of the sales force,
particularly at major accounts. We have many programs in place to heighten industry awareness of our products,
including participation in technical conferences, publication of articles in industry journals and exhibitions at trade
shows.

MANUFACTURING AND SUPPLIERS

We use third party contract manufacturers extensively to assemble our products and a substantial majority of
subassemblies and modules for our products. Our reliance on subcontractors involves several risks, and we may not
be able to obtain an adequate supply of components, subassemblies, modules and turnkey systems on a timely basis.
In 2003, we entered into an agreement with Plexus Services Corp. to act as our primary contract manufacturer.
Plexus currently provides us with a majority, by dollar amount, of the products we purchase from our contract
manufacturers. This agreement has automatic annual renewals, unless prior notice is given, and has been renewed
until October 2011. We do not generally maintain long-term agreements with any of our contract manufacturers.

Our internal manufacturing operations consist primarily of final assembly and testing of fiber optic systems.
These processes are performed by highly trained personnel, employing technologically advanced electronic
equipment and proprietary test programs. The manufacturing of our products and subassemblies is a complex
process, and we cannot be sure that we will not experience production problems or manufacturing delays in the
future. Because we utilize our own manufacturing facilities for the final assembly and test of our fiber optic systems,
and because such manufacturing capabilities are not readily available from third parties, any interruption in our
manufacturing operations could materially and adversely affect our business, operating results, financial position
and cash flows.

Managing our supplier relationships is particularly difficult during time periods in which we introduce new
products or in which demand for our products is increasing, especially if demand increases more quickly than we
expect. An inability to obtain adequate and timely deliveries, or any other circumstance that would require us to
seek alternative sources of supply, could affect our ability to ship our products on a timely basis, which could

damage relationships with current and prospective customers and harm our business. We attempt to limit this risk by
maintaining inventories of certain components, subassemblies and modules and through our demand order
fulfillment system. As a result of this investment in inventories, we have in the past been, and in the future
may be, subject to a risk of excess and obsolete inventories, which could adversely affect our business and operating
results.

INTELLECTUAL PROPERTY

We currently hold 55 issued U.S. patents and 13 issued foreign patents and have a number of patent
applications pending. Although we attempt to protect our intellectual property rights through patents, trademarks,
copyrights, licensing arrangements, maintaining certain technology as trade secrets and other measures, we cannot
assure you that any patent, trademark, copyright or other intellectual property rights owned by us will not be
invalidated, circumvented or challenged, that such intellectual property rights will provide competitive advantages
to us, or that any of our pending or future patent applications will be issued with the claims, or the scope of the
claims, sought by us, if at all. We cannot assure you that others will not develop technologies that are similar or
superior to our technology, duplicate our technology or design around the patents that we own. In addition, effective
patent, copyright and trade secret protection may be unavailable or limited in certain foreign countries in which we
do business or may do business in the future.

We generally enter into confidentiality or license agreements with our employees, consultants, vendors and
customers as needed, and generally limit access to, and distribution of, our proprietary information. However, no
assurances can be given that these actions will prevent misappropriation of our technology. In addition, if necessary,
we are prepared to take legal action, in the future, to enforce our patents and other intellectual property rights, to
protect our trade secrets, to determine the validity and scope of the proprietary rights of others, or to defend against
claims of infringement or invalidity. Any such litigation could result in substantial costs and diversion of resources,
including management time, and could negatively affect our business, operating results, financial position and cash
flows.

In order to successfully develop and market our products, we may be required to enter into technology
development or licensing agreements with third parties. Although many companies are often willing to enter into
such technology development or licensing agreements, we cannot assure you that such agreements can be
negotiated on reasonable terms or at all. The failure to enter into technology development or licensing agreements,
when necessary, could limit our ability to develop and market new products and could harm our business.

The markets we address are characterized by the existence of a large number of patents and frequent claims and
related litigation regarding patent and other intellectual property rights. In particular, leading companies in the telco
industry, as well as an increasing number of companies whose principal business is the ownership and exploitation
of patents, have extensive patent portfolios. From time to time, third parties, including certain of these companies,
have asserted and may assert exclusive patent, copyright, trademark and other intellectual property rights against us
or our customers. There can be no assurance that we will be able to defend against any claim that we are infringing
upon their intellectual property rights, that the terms of any license offered by any person asserting such rights
would be acceptable to us or our customers, or that failure to obtain a license or the costs associated with any license
would not materially and adversely affect our business, operating results, financial position and cash flows.

BACKLOG

We schedule production of our products and solutions based upon our backlog, open contracts, informal
commitments from customers and sales projections. Our backlog consists of firm purchase orders by customers for
delivery within the next twelve months, as well as deferred revenue which is expected to be recognized within the
succeeding twelve months. At December 31, 2010, backlog, including deferred revenue, was $121.9 million,
compared to $85.7 million at December 31, 2009. The increase in backlog at December 31, 2010, from
December 31, 2009, was due to an increase in orders received under which product shipments had not been
made, in part as a result of increased sales levels from the acquisition of Omneon, and due to an increase in deferred
revenue as a result of the timing of completion of projects and an increase in deferred maintenance revenue.
Delivery schedules on such orders may be deferred or canceled for a number of reasons, including reductions in

capital spending by our customers or changes in specific customer requirements. In addition, due to annual capital
spending budget cycles at many of our customers, our backlog at December 31, 2010, or any other date, is not
necessarily indicative of actual sales for any succeeding period.

COMPETITION

The markets for video infrastructure systems are extremely competitive and have been characterized by rapid
technological change and declining average selling prices. The principal competitive factors in these markets
include product performance, reliability, price, breadth of product offerings, network management capabilities,
sales and distribution capabilities, technical support and service, and relationships with network operators. We
believe that we compete favorably in each of these categories. Our competitors in digital video solutions include
vertically integrated system suppliers, such as Motorola, Cisco Systems, Ericsson and Technicolor, and, in certain
product lines, a number of smaller companies. In production and playout products, competitors include Harris,
Grass Valley, SeaChange and Avid. In edge devices and fiber optic access products, competitors include Motorola,
Cisco Systems and Arris.

Consolidation in the industry has led to the acquisition of several of our historic competitor companies. For
example, Scientific Atlanta, Tandberg Television and C-Cor were acquired by Cisco Systems, Ericsson and Arris,
respectively. Consequently, most of our principal competitors are substantially larger and have greater financial,
technical, marketing and other resources than Harmonic. Many of these larger organizations are in a better position
to withstand any significant reduction in capital spending by customers in these markets and are often more capable
of engaging in price-based competition for sales of products. They often have broader product lines and market
focus, and, therefore, will not be as susceptible to downturns in a particular market. In addition, many of our
competitors have been in operation longer than we have and have more long-standing and established relationships
with domestic and foreign customers. Further, a few of our competitors offer long-term lease financing to customers
for products competitive with ours. We may not be able to compete successfully in the future and competition may
harm our business, operating results, financial position and cash flows.

If any of our competitors’ products or technologies were to become the industry standard, our business could
be seriously harmed. In addition, companies that have historically not had a large presence in the broadband
communications equipment market have expanded their market presence through mergers and acquisitions.
Further, our competitors may bundle their products or incorporate functionality into existing products in a manner
that discourages users from purchasing our products or which may require us to lower our selling prices, which
could adversely affect our revenue and result in lower gross margins.

RESEARCH AND DEVELOPMENT

We have historically devoted a significant amount of our resources to research and development. Research and
development expenses in 2010, 2009 and 2008 were $77.2 million, $61.4 million and $54.5 million, respectively.
Our research and development activities are conducted primarily in the United States (California, Oregon, New
York and New Jersey), Israel and Hong Kong.

Our research and development program is primarily focused on developing new products and systems, and
adding new features to existing products and systems. Our development strategy is to identify features, products and
systems, in both software and hardware solutions, that are, or are expected to be, needed by our customers. Our
current research and development efforts are focused heavily on video processing solutions, including enhanced
video compression and multi-screen solutions. We also devote significant resources to production and playout and
distribution solutions. Other research and development efforts are devoted to edge QAM devices for both video and
data, and broadband optical products that enable the transmission of video over fiber optic networks.

Our success in designing, developing, manufacturing and selling new or enhanced products will depend on a
variety of factors, including the identification of market demand for new products, product selection, timely
implementation of product design and development, product performance, effective manufacturing and assembly
processes and sales and marketing. Because of the complexity inherent in such research and development efforts,
we cannot assure you that we will successfully develop new products, or that new products developed by us will

achieve market acceptance. Our failure to successfully develop and introduce new products would materially and
adversely affect our business, operating results, financial condition and cash flows.

EMPLOYEES

As of December 31, 2010, we employed a total of 1,106 people, including 432 in research and development,
437 in sales, service and marketing, 126 in manufacturing operations and 111 in a general and administrative
capacity. There were 665 employees in the U.S. and 441 employees in foreign countries located in the Middle East,
Europe, and Asia. We also employ a number of temporary employees and consultants on a contract basis. None of
our employees are represented by a labor union with respect to his or her employment by Harmonic. We have not
experienced any work stoppages, and we consider our relations with our employees to be good. Our future success
will depend, in part, upon our ability to attract and retain qualified personnel. Competition for qualified personnel in
the broadband communications industry and in the geographic areas where our primary operations are located
remains strong, particularly for highly qualified technical personnel, and we cannot assure you that we will be
successful in retaining our key employees or that we will be able to attract the key employees or highly qualified
technical personnel we may require in the future.

ABOUT HARMONIC

Harmonic was initially incorporated in California in June 1988 and reincorporated into Delaware in May 1995.

In July 2007, we completed the acquisition of Rhozet Corporation. Rhozet develops and markets software-
based transcoding solutions that facilitate the creation of multi-format video for Internet, mobile and broadcast
applications. With Rhozet’s products, and sometimes in conjunction with other Harmonic products, Harmonic’s
existing broadcast, cable, satellite and telco customers can deliver traditional video programming over the Internet
and to mobile devices, as well as expand the types of content delivered via their traditional networks to encompass
web-based and user-generated content.

In March 2009, we completed the acquisition of Scopus Video Networks, Ltd. The acquisition of Scopus was
intended to strengthen Harmonic’s position in international video broadcast and contribution and distribution
markets. Scopus provides complementary video processing technology, expanded research and development
capability and additional sales and distribution channels, particularly in emerging markets.

In September 2010, we completed the acquisition of Omneon, Inc., a private, venture-backed company
specializing in file-based infrastructure for the production, preparation and playout of video content typically
deployed by broadcasters, satellite operators, content owners and other media companies. The acquisition of
Omneon is complementary to Harmonic’s core business, expanding our customer reach into content providers and
extending our product lines into video servers and video-optimized storage for content production and playout.

Our principal executive offices are located at 4300 North First Street, San Jose, California 95134. Our
telephone number is (408) 542-2500. Our Internet website is http://www.harmonicinc.com. Other than the
information expressly set forth in this Annual Report on Form 10-K, the information contained or referred to
on our web site is not part of this report.

Available Information

Harmonic makes available free of charge, on the Harmonic web site, the Company’s Annual Report on
Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K (via link to the SEC website), and
amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as
reasonably practicable after Harmonic files such material with, or furnishes such material to, the Securities and
Exchange Commission. The address of the Harmonic web site is http://www.harmonicinc.com. Except as expressly
set forth in this Form 10-K, the contents of our web site are not incorporated into, or otherwise to be regarded as part
of, this report.

Item 1A. Risk Factors

We depend on cable, satellite and telco, and broadcast and media industry capital spending for a substan-
tial majority of our revenue and any material decrease or delay in capital spending in these industries
would negatively impact our operating results, financial condition and cash flows.

A substantial majority of our historical revenue has been derived from sales to cable television operators,
satellite and telco operators and broadcast companies, as well as, more recently, the emerging streaming media
providers. In September 2010, we completed the acquisition of Omneon, a private, venture-backed company
specializing in file-based infrastructure for the production, preparation and playout of video content typically
deployed by broadcasters, satellite operators, content owners and other media companies. We expect revenue from
all of these markets will constitute a substantial majority of revenue for the foreseeable future. Demand for our
products will depend on the magnitude and timing of capital spending by customers in these markets for
constructing and upgrading their systems.

These capital spending patterns are dependent on a variety of factors, including:

(cid:129) access to financing;

(cid:129) annual capital spending budget cycles of each of the industries we serve;

(cid:129) the impact of industry consolidation;

(cid:129) federal, local and foreign government regulation of telecommunications and television broadcasting;

(cid:129) overall demand for communication services and consumer acceptance of new video and data services;

(cid:129) evolving industry standards and network architectures;

(cid:129) competitive pressures, including pricing pressures;

(cid:129) discretionary end-user customer spending patterns; and

(cid:129) general economic conditions.

In the past, specific factors contributing to reduced capital spending have included:

(cid:129) uncertainty related to development of digital video industry standards;

(cid:129) delays in the evaluation of new services, new standards and system architectures by many operators;

(cid:129) emphasis by operators on generating revenue from existing customers, rather than from new customers

through new construction or network upgrades;

(cid:129) a reduction in the amount of capital available to finance projects of our customers and potential customers;

(cid:129) proposed and completed business combinations and divestitures by our customers and the length of

regulatory review thereof;

(cid:129) weak or uncertain economic and financial conditions in domestic or international markets, particularly in the

housing markets in the developed countries; and

(cid:129) bankruptcies and financial restructuring of major customers.

The financial difficulties of certain of our customers and changes in our customers’ deployment plans have
adversely affected our business in the past. In 2008 and 2009, economic conditions in many of the countries in
which we sell products were very weak, and global economic conditions and financial markets experienced a severe
downturn. The downturn stemmed from a multitude of factors, including adverse credit conditions, slower
economic activity, concerns about inflation and deflation, rapid changes in foreign exchange rates, increased
energy costs, decreased consumer confidence, reduced corporate profits and capital spending, adverse business
conditions and liquidity concerns. Although there was an increase in global economic activity in 2010, economic
growth may remain sluggish during 2011 in a few developed countries and in some emerging market countries. The
severity or length of time that these adverse economic and financial market conditions may persist, or whether such
adverse conditions may return in the U.S. and in other countries, is unknown. During challenging or uncertain
economic times, and in tight credit markets, many customers may delay or reduce capital expenditures, which in
turn often results in lower demand for our products.

Further, we have a number of international customers to whom sales are denominated in U.S. dollars. The
value of the U.S. dollar fluctuates significantly against many foreign currencies, which includes the local currencies
of many of our international customers. If the U.S. dollar appreciates relative to the local currencies of our
customers, then the prices of our products correspondingly increase for such customers. Such an effect could
adversely impact sales of our products to such customers and result in longer sales cycles, difficulties in collection
of accounts receivable, slower adoption of new technologies and increased price competition in the affected
countries. Further, if the U.S. dollar were to weaken against many major currencies, there can be no assurance that a
weaker dollar would lead to growth in capital spending.

In addition, industry consolidation has in the past constrained, and may in the future constrain, capital spending
by our customers. Further, if our product portfolio and product development plans do not position us well to capture
an increased portion of the capital spending of customers in the markets on which we focus, our revenue may
decline.

As a result of these capital spending issues, we may not be able to maintain or increase our revenue in the
future, and our operating results, financial condition and cash flows could be materially and adversely affected.

The markets in which we operate are intensely competitive.

The markets for our products are extremely competitive and have been characterized by rapid technological
change and declining average selling prices. Pressure on average selling prices was particularly severe during
previous economic downturns as equipment suppliers competed aggressively for customers’ reduced capital
spending, and we have experienced similar pressure during the recent economic slowdown.

Our principal competitors for edge and access and fiber optics access products include Cisco Systems,
Motorola and Arris. In the digital video solutions market, we compete broadly with products from vertically
integrated system suppliers, including Motorola, Cisco Systems, Technicolor and Ericsson, and, in certain product
lines, with a number of smaller companies. Our principal competitors for our storage products, including our
production and playout products, are Harris, Grass Valley, SeaChange and Avid.

Many of our competitors are substantially larger, and have greater financial, technical, marketing and other
resources, than we do. Many of these large enterprises are in a better position to withstand any significant reduction
in capital spending by customers in these markets. They often have broader product lines and market focus, and may
not be as susceptible to downturns in a particular market. These competitors may also be able to bundle their
products together to meet the needs of a particular customer, and may be capable of delivering more complete
solutions than we are able to provide. To the extent large enterprises that currently do not compete directly with us
choose to enter our markets by acquisition or otherwise, competition would likely intensify.

Further, some of our competitors that have greater financial resources have offered, and in the future may offer,
their products at lower prices than we offer for our competing products or more attractive financing terms, which has
in the past, and may in the future, cause us to lose sales opportunities and the resulting revenue or to reduce our
prices in response to that competition. Reductions in prices for any of our products could materially and adversely
affect our operating margins and revenue. In addition, many of our competitors have been in operation longer than
we have, and, therefore, have more long-standing and established relationships with domestic and foreign
customers, making it difficult for us to sell to those customers.

If any of our competitors’ products or technologies were to become the industry standard, our business would
be seriously harmed. If our competitors are successful in bringing their products to market earlier than us, or if these
products are more technologically capable than ours, our revenue could be materially and adversely affected. In
addition, certain companies that have not had a large presence in the broadband communications equipment market
have begun to expand their presence in this market through mergers and acquisitions. The continued consolidation
of our competitors could have a significant negative impact on our business. Further, our competitors, particularly
companies that offer products that are competitive with our digital video systems, may bundle their products or
incorporate functionality into existing products in a manner that discourages users from purchasing our products or
which may require us to lower our selling prices, resulting in lower revenues and decreased gross margins.

If we are unable to compete at the same level as we have in the past, in any of our markets, or are forced to
reduce the prices of our products in order to continue to be competitive, our operating results, financial condition
and cash flows would be materially and adversely affected.

We need to develop and introduce new and enhanced products in a timely manner to meet the needs of
our customers and to remain competitive.

All of the markets we address are characterized by continuing technological advancement, changes in
customer requirements and evolving industry standards. To compete successfully, we must continually design,
develop, manufacture and sell new or enhanced products that provide increasingly higher levels of performance and
reliability and meet our customers changing needs. However, we may not be successful in those efforts if, among
other things, our products:

(cid:129) are not cost effective;

(cid:129) are not brought to market in a timely manner;

(cid:129) are not in accordance with evolving industry standards and architectures;

(cid:129) fail to meet market acceptance or customer requirements; or

(cid:129) are ahead of the market.

We are currently developing and marketing products based on established video compression standards.
Encoding products based on the MPEG-2 compression standards have historically represented a significant portion
of our revenue. Newer standards, such as MPEG-4 AVC/H.264, that have been adopted provide significantly greater
compression efficiency, thereby making more bandwidth available to operators. The availability of more bandwidth
is particularly important to those operators seeking to launch, or expand, HDTV services. We have developed and
launched products, including HD encoders, based on these new standards in order to remain competitive, and are
continuing to devote considerable resources to these efforts. In addition, we have launched an encoding platform
that is capable of being configured for both MPEG-2 and MPEG-4, in both standard definition and HD formats. At
the same time, we need to devote development resources to the existing MPEG-2 standard which many of our
customers continue to require. There can be no assurance that these efforts will be successful in the near future, or at
all, or that competitors will not take significant market share in HD encoding.

In addition, our customers are paying more attention to audio products and features than they have in the past.
This enhanced attention to audio is likely to result in additional product requirements and the related need for more
development and support staff with audio expertise and training. Hiring and retaining such staff may be difficult and
costly. We cannot assure you that we will be able to timely hire development and support staff with audio expertise
or that our efforts to develop enhanced audio products and features will be successful in the near future, or at all.

In order to successfully develop and market certain of our planned products, we may be required to enter into
technology development or licensing agreements with third parties. We cannot assure you that we will be able to
timely enter into any necessary technology development or licensing agreements on reasonable terms, or at all.

If we fail to develop and market new and enhanced products, our operating results, financial condition and cash

flows could be materially and adversely affected.

Our operating results are likely to fluctuate significantly and, as a result, may fail to meet or exceed the
expectations of securities analysts or investors, causing our stock price to decline.

Our operating results have fluctuated in the past and are likely to continue to fluctuate in the future, on an
annual and a quarterly basis, as a result of several factors, many of which are outside of our control. Some of the
factors that may cause these fluctuations include:

(cid:129) the level and timing of capital spending of our customers, both in the U.S. and in foreign markets, due in part

to access to financing, including credit, for capital spending;

(cid:129) economic and financial conditions specific to the cable, satellite and telco, and broadcast and media

industries;

(cid:129) changes in market demand for our products or customer’s services or products;

(cid:129) the timing and amount of orders, especially from significant customers;

(cid:129) the timing of revenue recognition from solution contracts, which may span several quarters;

(cid:129) increases and decreases in the number and size of relatively larger transactions, and projects in which we are

involved, from quarter to quarter;

(cid:129) the timing of revenue recognition on sales arrangements, which may include multiple deliverables;

(cid:129) the timing of acquisitions and the financial impact of such acquisitions;

(cid:129) the timing of completion of our customers’ projects;

(cid:129) competitive market conditions, including pricing actions by our competitors;

(cid:129) lack of predictability in our revenue cycles;

(cid:129) the level and mix of our international revenue;

(cid:129) new product introductions by our competitors or by us;

(cid:129) the timing of our development of custom products and software;

(cid:129) changes in domestic and international regulatory environments affecting our business;

(cid:129) market acceptance of our new or existing products;

(cid:129) impact of new revenue recognition accounting standards, which are effective in 2011;

(cid:129) the evaluation of new services, new standards and system architectures by our customers;

(cid:129) the cost and availability to us of components, subassemblies and modules;

(cid:129) the mix of our customer base, by industry and size, and sales channels;

(cid:129) the mix of our products sold and the effect it has on gross margins;

(cid:129) changes in our operating and extraordinary expenses, such as litigation expenses and settlement costs;

(cid:129) impairment of our goodwill and intangibles;

(cid:129) the outcome of litigation;

(cid:129) write-downs of inventory and investments;

(cid:129) the impact of applicable accounting guidance that requires us to record the fair value of stock options,

restricted stock units and employee stock purchase plan awards as compensation expense;

(cid:129) changes in our effective tax rate, including as a result of changes in our valuation allowance against our
deferred tax assets, changes in our effective state tax rates, including as a result of apportionment, and
changes in our mix of domestic versus international revenue, as well as proposed amended tax rules related
to the deferral of foreign earnings and compliance with foreign tax rules;

(cid:129) the impact of applicable accounting guidance on accounting for uncertainty in income taxes that requires us

to establish reserves for uncertain tax positions and accrue potential tax penalties and interest;

(cid:129) the impact of applicable accounting guidance on business combinations that requires us to record charges for
certain acquisition related costs and expenses and generally to expense restructuring costs associated with a
business combination subsequent to the acquisition date; and

(cid:129) general economic conditions.

The timing of deployment of our products by our customers can be subject to a number of other risks, including
the availability of skilled engineering and technical personnel, the availability of other equipment, such as
compatible set top boxes, our customers’ ability to negotiate and enter into rights agreements with video content
owners that provide the customers with the right to deliver certain video content, and our customers’ need for local
franchise and licensing approvals.

We often recognize a substantial portion of our quarterly revenues in the last month of the quarter. We establish
our expenditure levels for product development and other operating expenses based on projected revenue levels for
a specified period, and expenses are relatively fixed in the short term. Accordingly, even small variations in timing
of revenue, particularly from large individual transactions, can cause significant fluctuations in operating results in
a particular quarter.

As a result of these factors and other factors, our operating results in one or more future periods may fail to
meet or exceed the expectations of securities analysts or investors. In that event, the trading price of our common
stock would likely decline.

Our customer base is concentrated and we are regularly involved in relatively large transactions. The loss
of one or more of our key customers, or a failure to diversify our customer base, as well as a decrease in
the number of such larger transactions, could harm our business.

In addition, historically, we have been dependent upon capital spending in the cable and satellite industry. We
are attempting to further diversify our customer base beyond cable and satellite customers, including to the telco and
broadcast and media markets. Several major telcos have rebuilt or are upgrading their networks to offer bundled
video, voice and data services. In order to be successful in this market, we may need to continue to build alliances
with telco equipment manufacturers, adapt our products for telco applications, take orders at prices resulting in
lower margins, and build internal expertise to handle the particular contractual and technical demands of the telco
industry. In addition, telco video deployments, including recent trials of mobile video services, are subject to delays
in completion, as video processing technologies and video business models are relatively new to most telcos and
many of their largest suppliers. Implementation issues with our products or those of other vendors have caused, and
may continue to cause, delays in project completion for our customers and delay our recognition of revenue.

As a result of these and other factors, we may be unable to increase our revenues from telco and broadcast and
media customers and other markets, or to do so profitably, and any failure to increase revenues and profits from
these customers would adversely affect our stock price and could materially and adversely affect our operating
results, financial condition and cash flows.

If we do not realize improvement in our operating results and other benefits expected from our recently
completed acquisition of Omneon, our business may be adversely affected and our stock price could
decline.

Our recently completed acquisition of Omneon, a private, venture-backed company specializing in file-based
infrastructure for the production, preparation and playout of video content, involves the integration of a business
that had previously operated independently. The integration of a previously independent company into the acquiring
company’s operations is a challenging, time-consuming and costly process. While the integration process for
Omneon began in September 2010, when the Omneon acquisition was consummated, it will take some time to
complete the process. It is possible that the process of integrating Omneon could result in our inability to fully
realize the expected synergies and other benefits of the acquisition, the loss of key employees, the disruption of our
ongoing businesses and that of Omneon, and inconsistencies in standards, controls, procedures, and policies that
adversely affect our ability to maintain relationships with customers, suppliers, and employees, and would involve
many of the other risks of any acquisition described in the risk factor concerning acquisitions on page 27). In
addition, the successful combination of the companies requires the dedication of significant management resources,
which could temporarily divert attention from the day-to-day business of the combined company. There can be no
assurance that these challenges will be met, and that we will realize the anticipated benefits from the acquisition of
Omneon, on a timely basis or at all. If we are unable to realize these benefits, our goal of expanding into the markets
on which Omneon focuses and our business, in general, may be adversely affected and our stock price may decline.

We depend significantly on our international revenue and are subject to the risks associated with interna-
tional operations, which may negatively affect our operating results.

Revenue derived from customers outside of the U.S. in 2010, 2009 and 2008 represented 50%, 49% and 44% of
our revenue, respectively. We expect that international revenue will continue to represent a similar substantial
percentage of our revenue for the foreseeable future. Furthermore, most of our contract manufacturing occurs
overseas. Our international operations, the international operations of our contract manufacturers and our efforts to
maintain and increase revenue in international markets are subject to a number of risks, which are generally greater
with respect to emerging market countries, including the impact on our business and operating results of:

(cid:129) a slowdown or leveling off in international economies, which may adversely affect our customers’ capital

spending;

(cid:129) changes in foreign government regulations and telecommunications standards;

(cid:129) import and export license requirements, tariffs, taxes and other trade barriers;

(cid:129) fluctuations in currency exchange rates;

(cid:129) a significant reliance on distributors, resellers and other third parties to sell our products and solutions,

particularly in emerging market countries;

(cid:129) difficulty in collecting accounts receivable, especially from smaller customers and resellers, particularly in

emerging market countries;

(cid:129) compliance with the U.S. Foreign Corrupt Practices Act, or FCPA, particularly in emerging market

countries;

(cid:129) the burden of complying with a wide variety of foreign laws, treaties and technical standards;

(cid:129) fulfilling “country of origin” requirements for our products for certain customers;

(cid:129) difficulty in staffing and managing foreign operations;

(cid:129) political and economic instability, including risks related to terrorist activity, particularly in emerging

market countries;

(cid:129) changes in economic policies by foreign governments;

(cid:129) lack of basic infrastructure, particularly in emerging market countries;

(cid:129) availability of credit, particularly in emerging market countries; and

(cid:129) impact of the recent escalating social and political unrest in the Middle East.

In the past, certain of our international customers accumulated significant levels of debt and have undertaken
reorganizations and financial restructurings, including bankruptcy proceedings. Even where these restructurings
have been completed, in some cases these customers have not been in a position to purchase new equipment at levels
we had seen in the past.

While our international revenue and operating expenses have typically been denominated in U.S. dollars,
fluctuations in currency exchange rates could cause our products to become relatively more expensive to customers
in a particular country, leading to a reduction in revenue or profitability from sales in that country. A portion of our
European business is denominated in Euros, which subjects us to increased foreign currency risk. Gains and losses
on the conversion to U.S. dollars of accounts receivable, accounts payable and other monetary assets and liabilities
arising from international operations may contribute to fluctuations in operating results.

Furthermore, payment cycles for international customers are typically longer than those for customers in the
U.S. Unpredictable payment cycles could cause us to fail to meet or exceed the expectations of security analysts and
investors for any given period.

Our operations outside the United States also require us to comply with a number of United States and
international regulations. For example, our operations in countries outside the United States are subject to the FCPA
and similar laws, which prohibits United States companies or their agents and employees from providing anything
of value to a foreign official for the purposes of influencing any act or decision of these individuals, in their official
capacity, to help obtain or retain business, direct business to any person or corporate entity or obtain any unfair
advantage. Our activities in countries outside the United States create the inherent risk of unauthorized payments or
offers of payments by one of our employees or agents, including those companies to which we outsource certain of
our business operations, which could be in violation of the FCPA, even though these parties are not always subject to
our control. We have internal control policies and procedures, and have implemented training and compliance
programs for our employees and agents, with respect to the FCPA. However, we cannot assure you that our policies,
procedures and programs will prevent violations of the FCPA or similar laws by our employees or agents,
particularly in emerging market countries, and as we expand our international operations. Any such violation, even
if prohibited by our policies, could result in criminal or civil sanctions against us.

The effect of one or more of these international risks could have a material adverse effect on our business,

financial condition, results of operations and cash flows.

Our future growth depends on market acceptance of several broadband services, on the adoption of new
broadband technologies and on several other broadband industry trends.

Future demand for many of our products will depend significantly on the growing market acceptance of
emerging broadband services, including digital video, VOD, HDTV, IPTV, mobile video services, and very high-
speed data services. The market demand for such emerging services is rapidly growing, with many de facto or
proprietary systems in use, which increases the challenge of delivering interoperable products intended to address
the requirements of such services.

The effective delivery of these services will depend, in part, on a variety of new network architectures and

standards, such as:

(cid:129) video compression standards, such as MPEG-4 AVC/H.264, for both standard definition and high definition

services;

(cid:129) fiber to the premises, or FTTP, and digital subscriber line, or DSL, networks designed to facilitate the

delivery of video services by telcos;

(cid:129) the greater use of protocols such as IP;

(cid:129) the further adoption of bandwidth-optimization techniques, such as switched digital video and DOCSIS

3.0; and

(cid:129) the introduction of new consumer devices, such as advanced set-top boxes, personal video recorders, or

PVRs, and a variety of “smart phone” mobile devices, such as the iPhone.

If adoption of these emerging services and/or technologies is not as widespread or as rapid as we expect, or if
we are unable to develop new products based on these technologies on a timely basis, our revenue will be materially
and adversely affected.

Furthermore, other technological, industry and regulatory trends will affect the growth of our business. These

trends include the following:

(cid:129) convergence, or the need of many network operators to deliver a package of video, voice and data services to

consumers, including mobile delivery options;

(cid:129) the increasing availability of traditional broadcast video content on the Internet;

(cid:129) the entry of telcos into the video business;

(cid:129) the emergence of ATSC mobile handheld as a viable content delivery system;

(cid:129) the use of digital video by businesses, governments and educational institutions;

(cid:129) efforts by regulators and governments in the U.S. and abroad to encourage the adoption of broadband and

digital technologies;

(cid:129) increased consumer interest in 3D television and content;

(cid:129) the extent and nature of regulatory attitudes towards such issues as network neutrality, competition between
operators, access by third parties to networks of other operators, local franchising requirements for telcos to
offer video, and other new services, such as mobile video; and

(cid:129) the outcome of litigation and negotiations between content owners and service providers regarding rights of
service providers to store and distribute recorded broadcast content, which outcomes may drive adoption of
one technology over another in some cases.

If we fail to recognize and respond to these trends, by timely developing products, features and services
required by these trends, we are likely to lose revenue opportunities and our results of operations and stock price
could be materially and adversely affected.

Changes in telecommunications legislation and regulations could harm our prospects and future revenue.

Changes in telecommunications legislation and regulations in the U.S. and other countries could affect the
revenue from our products. In particular, regulations dealing with access by competitors to the networks of
incumbent operators could slow or stop additional construction or expansion by these operators. Increased
regulation of our customers’ pricing or service offerings could limit their investments and, consequently, revenue
from our products. The impact of new or revised legislation or regulations could have a material adverse effect on
our business, operating results, and financial condition.

Newly adopted Federal laws will likely impact the demand for product features by our customers. These laws
include the Commercial Advertisement Loudness Mitigation Act and the Twenty-First Century Communications
and Video Accessibility Act of 2010, which deals with accessibility for the hearing and visually impaired. While we
have added some features to our products in anticipation of these laws, others (driven by the regulatory process
related to the laws) may require feature development on a schedule which may be inflexible and difficult to meet.
This could result in our inability to develop other product features necessary for particular transactions at the same
time, and thus we could lose some business and the related revenue.

We purchase several key components, subassemblies and modules used in the manufacture or integration
of our products from sole or limited sources, and we are increasingly dependent on contract manufactur-
ers and other subcontractors.

Many components, subassemblies and modules necessary for the manufacture or integration of our products
are obtained from a sole supplier or a limited group of suppliers. For example, we depend on a small private
company for certain video encoding chips which are incorporated into several products. Our reliance on sole or
limited suppliers, particularly foreign suppliers, and our increased reliance on subcontractors for manufacturing and
installation, involves several risks, including a potential inability to obtain an adequate supply of required
components, subassemblies or modules and reduced control over costs, quality and timely delivery of components,
subassemblies or modules and timely installation of products. In particular, certain optical components have in the
past been in short supply and are available only from a small number of suppliers, including sole source suppliers.
These risks could be heightened during a substantial economic slowdown, because our suppliers and subcontractors
are more likely to experience adverse changes in their financial condition and operations during such a period.
While we expend resources to qualify additional component sources, consolidation of suppliers in the industry and
the small number of viable alternatives have limited the results of these efforts. Managing our supplier and
contractor relationships is particularly difficult during time periods in which we introduce new products and during
time periods in which demand for our products is increasing, especially if demand increases more quickly than we
expect.

From time to time we assess our relationship with our contract manufacturers, and we do not generally
maintain long-term agreements with any of our suppliers or contract manufacturers. Plexus Services Corp. acts as
our primary contract manufacturer, and currently provides us with a majority of the products that we purchase from
our contract manufacturers. Our agreement with Plexus has automatic annual renewals, unless prior notice is given
by either party, and has been renewed until October 2011.

Since October 2009, most of the products previously manufactured by our Israeli operations have been
outsourced to third party manufacturers located in Israel. Our ability to improve production efficiency with respect
to that business may be limited by the terms of research grants that we received from the Israeli Office of the Chief
Scientist, or OCS, an arm of the Israeli government. These grants restrict the transfer outside of Israel of intellectual
property developed with funding from the OCS, and also limit the manufacturing outside of Israel of products
containing such intellectual property.

Any difficulties in managing relationships with current contract manufacturers, particularly Plexus, which
manufacturers our products off-shore, could impede our ability to meet our customers’ requirements and adversely
affect our operating results. An inability to obtain adequate and timely deliveries, or any other circumstance that
would require us to seek alternative sources of supply, could negatively affect our ability to ship our products on a
timely basis, which could damage relationships with current and prospective customers and harm our business and
materially and adversely affect our revenues. We attempt to limit this risk by maintaining safety stocks of certain
components, subassemblies and modules. Recent increases in demand on our suppliers and subcontractors from
other parties have caused sporadic shortages of certain components and products. In response, we have increased
our inventories of certain components and products and expedited shipments of our products when necessary, which
has increased our costs. As a result of this investment in inventories, we have in the past been, and in the future may
be, subject to risk of excessive or obsolete inventories, which, despite our use of a demand order fulfillment model,
could materially and adversely affect our business, operating results, financial position and cash flows. In this
regard, our gross margins and operating results have, in the past, been adversely affected by significant excess and
obsolete inventory charges.

Fluctuations in our future effective tax rates could affect our future operating results, financial condition
and cash flows.

We are required to periodically review our deferred tax assets and determine whether, based on available
evidence, a valuation allowance is necessary. Accordingly, we have performed such evaluation, from time to time,
based on historical evidence, trends in profitability, expectations of future taxable income and implemented tax
planning strategies. In 2008, we determined that a valuation allowance was no longer necessary for substantially all

of our U.S. deferred tax assets because, based on the available evidence, we concluded that realization of these net
deferred tax assets was more likely than not. We continue to maintain a valuation allowance for certain foreign
deferred tax assets, and recorded a valuation allowance on certain of our California deferred tax assets in the first
quarter of 2009 as a result of our expectations of future usage of the California deferred tax assets. In the event, in the
future, we determine an additional valuation allowance is necessary with respect to our U.S. and certain foreign
deferred tax assets, we would incur a charge equal to the amount of the valuation allowance in the period in which
we made such determination as a discrete item, and this could have a material and adverse effect on our results of
operations for such period.

The calculation of tax liabilities involves dealing with uncertainties in the application of complex global tax
regulations. We recognize potential liabilities for anticipated tax audit issues in the U.S. and other tax jurisdictions
based on our estimate of whether, and the extent to which, additional taxes will be due. In the event we determine
that it is appropriate to create a reserve or increase an existing reserve for any such potential liabilities, the amount of
the additional reserve is charged as an expense in the period in which it is determined. If payment of these amounts
ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the
period when we determine the liabilities are no longer necessary. If the estimate of tax liabilities proves to be less
than the ultimate tax assessment for the applicable period, a further charge to expense in the period such short fall is
determined would result. Either such charge to expense could have a material and adverse effect on our results of
operations for the applicable period. We have been notified by the Internal Revenue Service that our 2008 and 2009
U.S. corporate income tax return has been selected for audit, which is expected to commence in the second quarter
of 2011. If upon the conclusion of these audits, the ultimate determination of taxes owed in the U.S. is for an amount
in excess of the tax provision we have recorded in the applicable period, our overall tax expense and effective rate
could be adversely impacted in the period of adjustment.

We have requested an Advanced Pricing Agreement with the Internal Revenue Service regarding our non-
exclusive license of our intellectual property rights to one of our international subsidiaries, in 2008, and our sharing
of research and development costs with our international subsidiaries. If the Internal Revenue Service is unwilling
to enter into such agreement on substantially the terms we have proposed and we are ultimately forced to settle on
terms that are unfavorable to us, we may be required to take a charge to expense, in the period of the settlement,
arising from such unfavorable terms that could have a material and adverse effect on our results of operations for
such period. We completed the same non-exclusive license of Omneon intellectual property in the fourth quarter of
2010, and expect to request the Internal Revenue Service to enter into an Advanced Pricing Agreement with respect
to the Omneon license, which will have the same risk to us as the Advanced Pricing Agreement we are presently
negotiating.

We continue to be in the process of expanding our international operations and staffing to better support our
expansion into international markets. This expansion includes the implementation of an international structure that
includes, among other things, an international support center in Europe, a research and development cost-sharing
arrangement, certain licenses and other contractual arrangements between us and our wholly-owned domestic and
foreign subsidiaries. As a result of these changes, we anticipate that our consolidated pre-tax income will be subject
to foreign tax at relatively lower tax rates when compared to the United States federal statutory tax rate and, as a
consequence, our effective income tax rate is expected to be lower than the United States federal statutory rate. In
addition, recent statements from the IRS have indicated their intent to seek greater disclosure by companies of their
reserves for uncertain tax positions.

Our future effective income tax rates could be adversely affected if tax authorities challenge our international
tax structure or if the relative mix of United States and international income changes for any reason. Accordingly,
there can be no assurance that our income tax rate will be less than the United States federal statutory rate in future
periods.

We or our customers may face intellectual property infringement claims from third parties.

Our industry is characterized by the existence of a large number of patents and frequent claims and related
litigation regarding patent and other intellectual property rights. In particular, leading companies in the telco
industry have extensive patent portfolios. From time to time, third parties have asserted, and may assert in the future,

patent, copyright, trademark and other intellectual property rights against us or our customers. Our suppliers and
their customers, including us, may have similar claims asserted against them. A number of third parties, including
companies with greater financial and other resources than us, have asserted patent rights to technologies that are
important to us. Any future intellectual property litigation, regardless of its outcome, could result in substantial
expense and significant diversion of the efforts of our management and technical personnel. An adverse deter-
mination in any such proceeding could subject us to significant liabilities, temporary or permanent injunctions or
require us to seek licenses from third parties or pay royalties that may be substantial. Furthermore, necessary
licenses may not be available on terms satisfactory to us, or at all. An unfavorable outcome on any such litigation
matter could require that we pay substantial damages, could require that we pay ongoing royalty payments or could
prohibit us from selling certain of our products. Any such outcome could have a material adverse effect on our
business, operating results, financial position and cash flows.

In April 2010, Arris Corporation filed a complaint in United States District Court in Atlanta, alleging that our
Streamliner 3000 product infringes four patents held by Arris. The complaint seeks injunctive relief and damages.
Harmonic was served with the complaint in August 2010 and filed its answer in September 2010. At this time, we
cannot predict the outcome of this matter, with certainty. In connection with this matter, we recorded a $1.3 million
liability in the fourth quarter of 2010 based on management’s determination of our probable and estimable exposure
in the matter. An unfavorable outcome of this matter, at a level materially above such charge, could adversely affect
our operating results, financial position and cash flows.

In July 2003, Stanford University and Litton Systems (now Northrop Grumman Guidance and Electronics
Company, Inc.) filed a complaint in U.S. District Court for the Central District of California alleging that optical
fiber amplifiers incorporated into certain of our products infringe U.S. Patent No. 4859016. This patent expired in
September 2003. The complaint sought injunctive relief, royalties and damages. The judge ordered the parties to
mediation, and following the mediation sessions, Harmonic and Litton entered into a settlement agreement in
January 2009. The settlement agreement provided that, in exchange for a one-time lump sum payment from us to
Litton of $5 million, Litton (i) will not bring suit against us, or any of our affiliates, customers, vendors,
representatives, distributors, or contract manufacturers, for any liability for making, using, offering for sale,
importing, and/or selling any Harmonic products that may have incorporated technology that was alleged to have
infringed one or more of the relevant patents, and (ii) released us from any liability for making, using, or selling any
Harmonic products that may have infringed on such patents. We paid the settlement amount in January 2009.

Our suppliers and customers may have intellectual property claims relating to our products asserted against
them. We have agreed to indemnify some of our suppliers and customers for patent infringement relating to our
products. The scope of this indemnity varies, but, in some instances, includes indemnification for damages and
expenses (including reasonable attorney’s fees) incurred by the supplier or customer in connection with such
claims.

We may be the subject of litigation which, if adversely determined, could harm our business and operat-
ing results.

In addition to the litigation discussed elsewhere in this Report on Form 10-K, we may be subject to claims
arising in the normal course of business. The costs of defending any litigation, whether cash expenses or in
management time, could harm our business and materially and adversely affect our operating results and cash flows.
An unfavorable outcome on any litigation matter could require that we pay substantial damages, or, in connection
with any intellectual property infringement claims, could require that we pay ongoing royalty payments or could
prohibit us from selling certain of our products. In addition, we may decide to settle any litigation, which could
cause us to incur significant settlement costs. A settlement or an unfavorable outcome on any litigation matter could
have a material adverse effect on our business, operating results, financial position or cash flows.

As an example, we have received letters from several of our customers, notifying us that the customer intends
to exercise its indemnification rights in agreements between the customer and us with respect to a patent
infringement claim brought against the customer that may cover products we have sold to the customer. Many
of these notices arise out of a spate of patent infringement claims, and related litigation, made by the Multimedia
Patent Trust (“MPT”), an affiliate of Alcatel-Lucent, against end-users of products used in the industries we

address. Any such litigation by MPT may be very expensive to defend, and there could be significant financial
exposure to each of such customers if MPT is successful in such litigation or in extracting a settlement of such
claims. None of the notices we have received from a customer with respect to its indemnification rights related to
the MPT litigation has demanded that we defend the customer against such claims or litigation, or currently
reimburse the customer for its costs of such defense, or pay any other specified sum to the customer. At this time, we
cannot predict whether the claims by MPT are legitimate or actually cover any of our products, whether any of the
claims may result in a settlement or judgment against a customer defendant, or whether we would have any liability
under our indemnification obligations for defense or settlement costs or damages paid by any customer defendant.
In the event one or more of our customers makes an indemnification claim against us with respect to a specific
amount of defense or settlement costs or damages it suffers as a result of such MPT claims or litigation, we could be
obligated to pay amounts to such customers that would materially and adversely affect our operating results,
financial condition and cash flows.

We rely on distributors, value-added resellers and systems integrators for a significant portion of our reve-
nue, and disruptions to, or our failure to develop and manage, our relationships with these customers and
the processes and procedures that support them could adversely affect our business.

We generate a significant portion of our revenue through sales to distributors, value-added resellers, or VARs,
and systems integrators, principally to assist us with fulfillment or installation obligations. We expect that these
sales will continue to generate a significant percentage of our revenue in the future. Accordingly, our future success
is highly dependent upon establishing and maintaining successful relationships with a variety of distributors. Our
reliance on VARs and systems integrators that specialize in video delivery solutions, products and services has
increased since the completion of our acquisition of Omneon in September 2010.

We generally have no long-term contracts or minimum purchase commitments with any of our distributor,
VAR or system integrator customers, and our contracts with these parties do not prohibit them from purchasing or
offering products or services that compete with ours. Our competitors may provide incentives to our distributor,
VAR and systems integrator customers to favor their products or, in effect, to prevent or reduce sales of our products.
Our distributor, VAR or systems integrator customers may independently choose not to purchase or offer our
products. Many of our distributors, VARs and system integrators are small, are based in a variety of international
locations and may have relatively unsophisticated processes and limited financial resources to conduct their
business. Any significant disruption to our sales to these customers, including as a result of the inability or
unwillingness of these customers to continue purchasing our products, or their failure to properly manage their
business with respect to the purchase of and payment for our products, could materially and adversely impact our
business, operating results, financial condition and cash flows. In addition, our failure to continue to establish or
maintain successful relationships with distributor, VAR and systems integrator customers could likewise materially
and adversely affect our business, operating results, financial condition and cash flows.

We have made, and expect to continue to make, acquisitions, and any acquisition could disrupt our opera-
tions and materially and adversely affect our operating results and financial condition.

As part of our business strategy, from time to time we have acquired, and continue to consider acquiring,
businesses, technologies, assets and product lines that we believe complement or expand our existing business.
Most recently, in September 2010, we completed the acquisition of Omneon, a privately-held company, that
provides broadcast video server and storage systems used for video production and play-to-air workflows. It is
likely that we will make additional acquisitions, from time to time, in the future.

We may face challenges as a result of these acquisition activities, because such activities entail numerous risks,

including:

(cid:129) the possibility that an acquisition may not close because of, among other things, a failure of a party to satisfy

the conditions to closing or an acquisition target entering into an alternative transaction;

(cid:129) unanticipated costs or delays associated with the acquisition;

(cid:129) difficulties in the assimilation and integration of acquired operations, technologies and/or products;

(cid:129) the diversion of management’s attention from the regular operations of the business and the challenges of

managing a larger and more geographically widespread operation and product portfolio;

(cid:129) difficulties in integrating acquired companies’ systems, controls, policies and procedures to comply with the

internal control over financial reporting requirements of the Sarbanes-Oxley Act of 2002;

(cid:129) adverse effects on new and existing business relationships with suppliers, contract manufacturers and

customers;

(cid:129) channel conflicts and disputes between distributors and other partners of ours and the acquired companies;

(cid:129) potential difficulties in completing projects associated with in-process research and development;

(cid:129) risks associated with entering markets in which we may have no or limited prior experience;

(cid:129) the potential loss of key employees of acquired businesses;

(cid:129) difficulties in the assimilation of different corporate cultures and practices;

(cid:129) difficulties in bringing acquired products and businesses into compliance with applicable legal requirements

in jurisdictions in which we operate and sell products;

(cid:129) substantial charges for acquisition costs, which are required to be expensed under accounting guidance on

business combinations;

(cid:129) substantial charges for the amortization of certain purchased intangible assets, deferred stock compensation

or similar items;

(cid:129) substantial impairments to goodwill or intangible assets in the event that an acquisition proves to be less

valuable than the price we paid for it; and

(cid:129) delays in realizing, or failure to realize, the anticipated benefits of an acquisition.

Competition within our industry for acquisitions of businesses, technologies, assets and product lines has been,
and is likely to continue to be, intense. As such, even if we are able to identify an acquisition that we would like to
consummate, we may not be able to complete the acquisition on commercially reasonable terms or because the
target chooses to be acquired by another company. Furthermore, in the event that we are able to identify and
consummate any future acquisitions, we may, in each of those acquisitions:

(cid:129) issue equity securities which would dilute current stockholders’ percentage ownership;

(cid:129) incur substantial debt to finance the acquisition or by assumption in the acquisition;

(cid:129) incur significant acquisition-related expenses;

(cid:129) assume substantial liabilities, contingent or otherwise; or

(cid:129) expend significant cash.

These financing activities or expenditures could materially and adversely affect our operating results and
financial condition or the price of our common stock, or both. Alternatively, due to difficulties in the capital or credit
markets, we may be unable to secure capital on reasonable terms, or at all, necessary to complete an acquisition.

Moreover, even if we were to obtain benefits from acquisitions in the form of increased revenue and earnings
per share, there may be a delay between the time the expenses associated with an acquisition are incurred and the
time we recognize such benefits.

If we are unable to successfully address any of these risks, our business, operating results, financial condition

and cash flows could be materially and adversely affected.

Conditions and changes in some national and global economic environments may adversely affect our
business and financial results.

Adverse economic conditions in geographic markets in which we operate may harm our business. Recently as
described in the first risk factor in this section, economic conditions in some countries in which we sell products,
principally emerging market countries, have been weak. That weakness is principally the result of global financial
markets having experienced a severe downturn, stemming from a multitude of factors, including adverse credit
conditions, slower economic activity, concerns about inflation and deflation, rapid changes in foreign exchange
rates, increased energy costs, decreased consumer confidence, reduced corporate profits and capital spending,
adverse business conditions and liquidity concerns. Economic growth in the U.S. and in many other countries
slowed in the fourth quarter of 2007, slowed further or remained relatively flat in 2008 and 2009 and remained
relatively flat in 2010, improving slightly in the U.S. toward the end of the year. The global economic slowdown led
many of our customers to decrease their expenditures in 2009, and we believe that this slowdown caused certain of
our customers to reduce or delay orders for our products. Many of our international customers, particularly those in
emerging markets, have been exposed to tight credit markets and depreciating currencies, further restricting their
ability to build out or upgrade their networks. Some customers have had difficulty in servicing or retiring existing
debt, and the financial constraints on certain international customers required us to significantly increase our
allowance for doubtful accounts in the fourth quarter of 2008.

During challenging economic times, and in tight credit markets, many customers may delay or reduce capital
expenditures. This could result in reductions in revenue of our products, longer sales cycles, difficulties in collection
of accounts receivable, slower adoption of new technologies and increased price competition. If global economic
and market conditions, or economic conditions in the United States or other key markets, remain weak or deteriorate
further, we may experience a material and adverse impact on our business, results of operations, financial condition
and cash flows.

Broadband communications markets are characterized by rapid technological change.

Broadband communications markets are subject to rapid changes, making it difficult to accurately predict the
markets’ future growth rates, sizes or technological directions. In view of the evolving nature of these markets, it is
possible that pay TV service providers, broadcasters, content providers and other video production and delivery
companies will decide to adopt alternative architectures, new business models, and/or technologies that are
incompatible with our current or future products. In addition, successful new entrants into the media markets, both
domestic and international, may impact existing industry business models, resulting in decreased spending by our
existing customer base. Finally, decisions by customers to adopt new technologies or products are often delayed by
extensive evaluation and qualification processes, which can result in delays in revenue of current and new products.
If we are unable to design, develop, manufacture and sell products that incorporate, or are compatible with, these
new architectures or technologies, our business, operating results, financial condition and cash flows will be
materially and adversely affected.

In order to manage our growth, we must be successful in addressing management succession issues and
attracting and retaining qualified personnel.

Our future success will depend, to a significant extent, on the ability of our management to operate effectively,
both individually and as a group. We must successfully manage transition and replacement issues that may result
from the departure or retirement of members of our executive management, whether in the context of an acquisition
or otherwise. We cannot assure you that changes of management personnel in the future would not cause disruption
to our operations or customer relationships or a decline in our operating results.

We are also dependent on our ability to retain and motivate our existing highly qualified personnel, in addition
to attracting new highly qualified personnel. Competition for qualified management, technical and other personnel
is often intense, and we may not be successful in attracting and retaining such personnel. Competitors and others
have in the past attempted, and are likely in the future to attempt, to recruit our employees. While our employees are
required to sign standard agreements concerning confidentiality and ownership of inventions, we generally do not
have employment contracts or non-competition agreements with any of our personnel. The loss of the services of

any of our key personnel, the inability to attract or retain highly qualified personnel in the future or delays in hiring
such personnel, particularly senior management and engineers and other technical personnel, could negatively
affect our business and our results of operations.

We may need additional capital in the future and may not be able to secure adequate funds on terms
acceptable to us.

We have been engaged in the design, manufacture and sale of a variety of video products and system solutions
since inception, which has required, and will continue to require, significant research and development expen-
ditures. As a result, we have generated substantial operating losses from the time we began operations in 1988.
These losses have had an adverse effect on our stockholders’ equity and working capital. As of December 31, 2010,
we had an accumulated deficit of $1.9 billion.

In September 2010, we completed the acquisition of Omneon. The purchase price was approximately
$251.3 million, which included approximately $153.3 million in cash, net of $40.5 million of cash acquired.
The cash portion of the purchase price was paid from then existing cash balances.

Taking into account the acquisition of Omneon and the use of approximately $153.3 million of cash to
complete the transaction, we believe that our existing cash of $120.4 million, at December 31, 2010, will satisfy our
cash requirements for at least the next twelve months. However, we may need to raise additional funds if our
expectations are incorrect, to take advantage of presently unanticipated strategic opportunities, to satisfy our other
cash requirements from time to time, or to strengthen our financial position. Our ability to raise funds may be
adversely affected by a number of factors, including factors beyond our control, such as weakness in the economic
conditions in markets in which we sell our products and continued uncertainty in the financial, capital and credit
markets. In particular, companies like us are experiencing some difficulty raising capital from issuances of debt or
equity securities in the current capital market environment and may also have difficulty securing bank financing.
There can be no assurance that such financing will be available to us on reasonable terms, if at all, when and if it is
needed.

In addition, we actively review potential acquisitions that would complement our existing product offerings,
enhance our technical capabilities or expand our marketing and sales presence. Any future transaction of this nature
could require potentially significant amounts of capital to finance the acquisition and related expenses, as well as to
integrate operations following the acquisition, and could require us to issue our stock and dilute existing
stockholders.

We may raise additional financing through public or private equity offerings, debt financings, or corporate
partnership or licensing arrangements. To the extent we raise additional capital by issuing equity securities or
convertible debt, our stockholders may experience dilution. To the extent that we raise additional funds through
collaboration and licensing arrangements, it may be necessary to relinquish some rights to our technologies or
products, or grant licenses on terms that are not favorable to us. To the extent we raise capital through debt financing
arrangements, we may be required to pledge assets or enter into covenants that could restrict our operations or our
ability to incur further indebtedness.

If adequate capital is not available, or is not available on reasonable terms, when needed, we may not be able to
take advantage of acquisition or other market opportunities, to timely develop new products or to otherwise respond
to competitive pressures.

We need to effectively manage our operations.

In recent years, the Company has grown significantly, principally through acquisitions, and expanded our
international operations. Upon the closing of our acquisition of Scopus in the first quarter of 2009, we added
221 employees, most of whom are based in Israel. Upon the closing of the acquisition of Omneon in September
2010, we added 286 employees, most of whom are based in the U.S. In addition, we now have 440 employees in our
international operations, representing approximately 40% of our worldwide workforce. Our ability to manage our
business effectively in the future, including with respect to any future growth, the integration of recent and any
future acquisitions, and the breadth of our international operations, will require us to train, motivate and manage our

employees successfully, to attract and integrate new employees into our overall operations, to retain key employees
and to continue to improve our operational, financial and management systems. There can be no assurances that we
will be successful in that regard, and our failure to effectively manage our operations could have a material and
adverse effect on our business, operating results and financial condition.

Our failure to adequately protect our proprietary rights may adversely affect us.

We currently hold 55 issued U.S. patents and 13 issued foreign patents, and have a number of patent
applications pending. Although we attempt to protect our intellectual property rights through patents, trademarks,
copyrights, licensing arrangements, maintaining certain technology as trade secrets and other measures, we can
give no assurances that any patent, trademark, copyright or other intellectual property rights owned by us will not be
invalidated, circumvented or challenged, that such intellectual property rights will provide competitive advantages
to us, or that any of our pending or future patent applications will be issued with the scope of the claims sought by us,
if at all. We can give no assurances that others will not develop technologies that are similar or superior to our
technologies, duplicate our technologies or design around the patents that we own. In addition, effective patent,
copyright and trade secret protection may be unavailable or limited in certain foreign countries in which we do
business or may do business in the future.

We believe that patents and patent applications are not currently significant to our business, and we do not rely
on our patent portfolio to give us a competitive advantage over others in our industry. We believe that the future
success of our business will depend on our ability to translate the technological expertise and innovation of our
personnel into new and enhanced products. We generally enter into confidentiality or license agreements with our
employees, consultants, and vendors and our customers, as needed, and generally limit access to and distribution of
our proprietary information. Nevertheless, we cannot assure you that the steps taken by us will prevent misap-
propriation of our technology. In addition, we have taken in the past, and may take in the future, legal action to
enforce our patents and other intellectual property rights, to protect our trade secrets, to determine the validity and
scope of the proprietary rights of others, or to defend against claims of infringement or invalidity. Such litigation
could result in substantial costs and diversion of management time and other resources, and could negatively affect
our business, operating results, financial position and cash flows.

In order to successfully develop and market certain of our planned products, we may be required to enter into
technology development or licensing agreements with third parties. Although many companies are often willing to
enter into technology development or licensing agreements, we cannot assure you that such agreements may be
negotiated on reasonable terms, or at all. The failure to enter into technology development or licensing agreements,
when necessary or desirable, could limit our ability to develop and market new products and could materially and
adversely affect our business.

Our products include third-party technology and intellectual property, and our inability to use that tech-
nology in the future could harm our business.

We incorporate certain third-party technologies, including software programs, into our products, and intend to
utilize additional third-party technologies in the future. Licenses to relevant third-party technologies or updates to
those technologies may not continue to be available to us on commercially reasonable terms, or at all. In addition,
the technologies that we license may not operate properly or as specified, and we may not be able to secure
alternatives in a timely manner, either of which could harm our business. We could face delays in product releases
until alternative technology can be identified, licensed or developed, and integrated into our products, if we are able
to do so at all. These delays, or a failure to secure or develop adequate technology, could materially and adversely
affect our business.

We face risks associated with having important facilities and resources located in Israel.

We maintain facilities in two locations in Israel with a total of 221 employees, or 20% of our worldwide
workforce, as of December 31, 2010. Our employees in Israel engage in a number of activities, including research
and development, the development of, and supply chain management, for one product line, and sales activities.

We are directly influenced by the political, economic and military conditions affecting Israel. Any significant
conflict involving Israel could have a direct effect on our business or that of our Israeli contract manufacturers, in
the form of physical damage or injury, reluctance to travel within or to Israel by our Israeli and other employees or
those of our subcontractors, or the loss of Israeli employees to active military duty. Most of our employees in Israel
are currently obligated to perform annual reserve duty in the Israel Defense Forces, and several have been called for
active military duty in recent years. In the event that more employees are called to active duty, certain of our
research and development activities may be adversely affected, including significantly delayed. In addition, the
interruption or curtailment of trade between Israel and its trading partners, as a result of terrorist attacks or
hostilities, conflicts between Israel and any other Middle Eastern country or any other cause, could significantly
harm our business. Current or future tensions in the Middle East could materially and adversely affect our business,
results of operations and financial condition.

Furthermore, the Israeli government grants that we received for research and development expenditures limit
our ability to manufacture products and transfer technologies outside of Israel, and, if we fail to satisfy specified
conditions in the grants, we may be required to refund such grants, together with interest and penalties, and may be
subject to criminal charges.

We are subject to import and export controls that could subject us to liability or impair our ability to
compete in international markets.

Our products are subject to U.S. export controls, and may be exported outside the United States only with the
required level of export license or through an export license exception, in most cases because we incorporate
encryption technology into our products. In addition, various countries regulate the import of certain technology
and have enacted laws that could limit our ability to distribute our products or could limit our customers’ ability to
implement our products in those countries. Changes in our products or changes in export and import regulations
may create delays in the introduction of our products in international markets, prevent our customers with
international operations from deploying our products throughout their global systems or, in some cases, prevent the
export or import of our products to certain countries altogether. Any change in export or import regulations or
related legislation, shift in approach to the enforcement or scope of existing regulations, or change in the countries,
persons or technologies targeted by such regulations, could result in decreased use of our products by, or in our
decreased ability to export or sell our products to, existing or potential customers internationally.

In addition, we may be subject to customs duties that could have a significant adverse impact on our operating
results or, if we are able to pass on the related costs in any particular situation, would increase the cost of the related
product to our customers. As a result, the future imposition of significant increases in the level of customs duties or
the creation of import quotas on our products in Europe or in other jurisdictions, or any of the limitations on
international sales described above, could have a material adverse effect on our business, operating results, financial
condition and cash flows. Further, some of our customers in Europe have been, or are being, audited by local
governmental authorities regarding the tariff classifications used for importation of our products. Import duties and
tariffs vary by country and a different tariff classification for any of our products may result in higher duties or
tariffs, which could have an adverse impact on our operating results and potentially increase the cost of the related
products to our customers.

Negative conditions in the global credit and financial markets may impair the liquidity or the value of a
portion of our investment portfolio.

The recent negative conditions in the global credit and financial markets have had an adverse impact on the
liquidity of certain investments. In the event we need or desire to access funds from the short-term investments that
we hold, it is possible that we may not be able to do so due to market conditions. If a buyer is found, but is unwilling
to purchase the investments at par or our cost, we may incur a loss. Further, rating downgrades of the security issuer
or the third parties insuring such investments may require us to adjust the carrying value of these investments
through an impairment charge. For example, during 2008, we recorded an impairment charge of $0.8 million
relating to an investment in an unsecured debt instrument of Lehman Brothers Holdings, Inc. Our inability to sell all
or some of our short-term investments at par or our cost, or rating downgrades of issuers of these securities, could
materially and adversely affect our results of operations, financial condition and cash flows.

In addition, we invest our cash, cash equivalents and short-term investments in a variety of investment vehicles
in a number of countries with, and in the custody of, financial institutions with high credit ratings. While our
investment policy and strategy attempt to manage interest rate risk, limit credit risk, and only invest in what we view
as very high-quality securities, the outlook for our investment holdings is dependent on general economic
conditions, interest rate trends and volatility in the financial marketplace, which can all affect the income that
we receive, the value of our investments and our ability to sell them.

We believe that our investment securities are carried at fair value. However, over time the economic and market
environment in which we conduct business may provide us with additional insight regarding the fair value of certain
securities in our portfolio that could change our judgment regarding impairment of those securities. This could
result in unrealized or realized losses in our securities, relating to other than temporary declines, being charged
against income. Given the current market conditions involved, there is continuing risk that further declines in fair
value of our portfolio securities may occur and additional impairments may be charged to income in future periods.

If demand for our products increases more quickly than we expect, we may be unable to meet our
customers’ requirements.

If demand for our products increases, the difficulty of accurately forecasting our customers’ requirements and
meeting these requirements will increase. Forecasting to meet customers’ needs and effectively managing our
supply chain is particularly difficult in connection with newer products. Our ability to meet customer demand
depends significantly on the availability of components and other materials, as well as the ability of our contract
manufacturers to scale their production. Furthermore, we purchase several key components, subassemblies and
modules used in the manufacture or integration of our products from sole or limited sources. Our ability to meet
customer requirements depends in part on our ability to obtain sufficient volumes of these materials in a timely
fashion. Increases in demand on our suppliers and subcontractors from other customers may cause sporadic
shortages of certain components and products. In order to be able to respond to these issues, we have increased our
inventories of certain components and products, particularly for our customers that order significant dollar amounts
of our products, and expedited shipments of our products when necessary, which has increased our costs and could
increase our risk of holding obsolete or excessive inventory. We also employ a demand order fulfillment model
which is designed to mitigate the effects of increases or decreases in demand for any products. Nevertheless, we
may be unable to respond to customer demand that increases more quickly than we expect. If we fail to meet
customers’ supply expectations, our revenue would be adversely affected and we may lose business, which could
materially and adversely affect our operating results, financial condition and cash flows.

We are subject to various laws and regulations related to the environment and potential climate change
that could impose substantial costs upon us and may adversely affect our business, operating results and
financial condition.

Our operations are regulated under various federal, state, local and international laws relating to the
environment and potential climate change, including those governing the management, disposal and labeling of
hazardous substances and wastes and the cleanup of contaminated sites. We could incur costs and fines, third-party
property damage or personal injury claims, or could be required to incur substantial investigation or remediation
costs, if we were to violate or become liable under environmental laws. The ultimate costs to us under these laws and
the timing of these costs are difficult to predict.

We also face increasing complexity in our product design as we adjust to new and future requirements relating
to the presence of certain substances in electronic products and making producers of those products financially
responsible for the collection, treatment, recycling, and disposal of certain products. For example, the European
Parliament and the Council of the European Union have enacted the Waste Electrical and Electronic Equipment
(WEEE) directive, which regulates the collection, recovery, and recycling of waste from electrical and electronic
products, and the Restriction on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
(RoHS) directive, which bans the use of certain hazardous materials, including lead, mercury, cadmium, hexavalent
chromium, polybrominated biphenyls (PBBs), and polybrominated diphenyl ethers (PBDEs) that exceed certain
specified levels. Legislation similar to RoHS and WEEE has been or may be enacted in other jurisdictions,
including in the United States, Japan, and China. Our failure to comply with these laws could result in our being

directly or indirectly liable for costs, fines or penalties and third-party claims, and could jeopardize our ability to
conduct business in such regions and countries.

We also expect that our operations will be affected by other new environmental laws and regulations on an
ongoing basis. Although we cannot predict the ultimate impact of any such new laws and regulations, they will
likely result in additional costs, and could require that we redesign or change how we manufacture our products, any
of which could have a material adverse effect on our business, operating results, financial condition and cash flows.

Some anti-takeover provisions contained in our certificate of incorporation, bylaws and stockholder rights
plan, as well as provisions of Delaware law, could impair a takeover attempt.

We have provisions in our certificate of incorporation and bylaws that could have the effect of rendering more
difficult or discouraging an acquisition deemed undesirable by our Board of Directors. These include provisions:

(cid:129) authorizing blank check preferred stock, which could be issued with voting, liquidation, dividend and other

rights superior to our common stock;

(cid:129) limiting the liability of, and providing indemnification to, our directors and officers;

(cid:129) limiting the ability of our stockholders to call, and bring business before, special meetings;

(cid:129) requiring advance notice of stockholder proposals for business to be conducted at meetings of our

stockholders and for nominations of candidates for election to our Board of Directors;

(cid:129) controlling the procedures for conduct and scheduling of Board and stockholder meetings; and

(cid:129) providing the Board of Directors with the express power to postpone previously scheduled annual meetings

and to cancel previously scheduled special meetings.

These provisions, alone or together, could delay hostile takeovers or changes in control of us or our

management.

In addition, we have adopted a stockholder rights plan. The rights are not intended to prevent a takeover, and
we believe these rights will help us in our negotiations with any potential acquirers. However, if the Board of
Directors believes that a particular acquisition of us is undesirable, the rights may have the effect of rendering more
difficult or discouraging that acquisition. The rights would cause substantial dilution to a person or group that
attempts to acquire us on terms, or in a manner, not approved by our Board of Directors, except pursuant to an offer
conditioned upon redemption of the rights.

As a Delaware corporation, we are also subject to provisions of Delaware law, including Section 203 of the
Delaware General Corporation law, which prevents some stockholders holding more than 15% of our outstanding
common stock from engaging in certain business combinations without approval of the holders of substantially all
of our outstanding common stock.

Any provision of our certificate of incorporation or bylaws, our stockholder rights plan or Delaware law that
has the effect of delaying or deterring a change in control could limit the opportunity for our stockholders to receive
a premium for their shares of our common stock, and could also affect the price that some investors are willing to
pay for our common stock.

Our common stock price may be extremely volatile, and the value of an investment in our stock may
decline.

Our common stock price has been highly volatile. We expect that this volatility will continue in the future due

to factors such as:

(cid:129) general market and economic conditions;

(cid:129) actual or anticipated variations in operating results;

(cid:129) announcements of technological innovations, new products or new services by us or by our competitors or

customers;

(cid:129) changes in financial estimates or recommendations by stock market analysts regarding us or our

competitors;

(cid:129) announcements by us or our competitors of significant acquisitions, strategic partnerships, joint ventures or

capital commitments;

(cid:129) announcements by our customers regarding end market conditions and the status of existing and future

infrastructure network deployments;

(cid:129) additions or departures of key personnel; and

(cid:129) future equity or debt offerings or our announcements of these offerings.

In addition, in recent years, the stock market in general, and the NASDAQ Stock Market and the securities of
technology companies in particular, have experienced extreme price and volume fluctuations. These fluctuations
have often been unrelated or disproportionate to the operating performance of individual companies. These broad
market fluctuations have in the past, and may in the future, materially and adversely affect our stock price,
regardless of our operating results. In these circumstances, investors may be unable to sell their shares of our
common stock at or above their purchase price over the short term, or at all.

Our stock price may decline if additional shares are sold in the market or if analysts drop coverage of, or
downgrade, our stock.

Future sales of substantial amounts of shares of our common stock by our existing stockholders in the public
market, or the perception that these sales could occur, may cause the market price of our common stock to decline.
In addition, we will be required to issue additional shares upon exercise of stock options or grants of restricted stock
units. Increased sales of our common stock in the market after exercise of outstanding stock options or grants of
restricted stock units could exert downward pressure on our stock price. These sales also might make it more
difficult for us to sell equity or equity-related securities in the future at a time and price we deem appropriate.

The trading market for our common stock relies in part on the availability of research and reports that third-
party industry or securities analysts publish about us. If one or more of the analysts who do cover us downgrade our
stock, our stock price may decline. If one or more of these analysts cease coverage of us, we could lose visibility in
the market, which in turn could cause the liquidity of our stock and our stock price to decline.

We are exposed to additional costs and risks associated with complying with increasing regulation of
corporate governance and disclosure standards.

We have been spending a substantial amount of management time and costly external resources to comply with
changes in laws, regulations and standards relating to corporate governance and public disclosure, including the
Sarbanes-Oxley Act of 2002, SEC regulations and the NASDAQ Stock Market rules. In particular, Section 404 of
the Sarbanes-Oxley Act requires management’s annual review and evaluation of our internal control over financial
reporting and attestation of the effectiveness of our internal control over financial reporting by our independent
registered public accounting firm in connection with the filing of our Report on Form 10-K for each fiscal year. We
have documented and tested our internal control systems and procedures and have made improvements in order for
us to comply with the requirements of Section 404. This process has required us to hire additional personnel and
outside advisory services and has resulted in significant additional expenses.

While our management’s assessment of our internal control over financial reporting resulted in our conclusion
that, as of December 31, 2010, our internal control over financial reporting was effective, and our independent
registered public accounting firm has attested that our internal control over financial reporting was effective in all
material respects as of December 31, 2010, we cannot predict the outcome of our testing and that of our independent
registered public accounting firm in future periods. If we conclude in future periods that our internal control over
financial reporting is not effective or if our independent registered public accounting firm is unable to provide an
unqualified attestation as of future year-ends, we will incur substantial additional costs in an effort to correct such
problems and investors may lose confidence in our financial statements, and the price of our stock will likely
decrease in the short term, until we correct such problems, and perhaps in the long term, as well.

The ongoing threat of terrorism has created uncertainty and may harm our business.

Current conditions in the U.S. and global economies are uncertain. The terrorist attacks in the U.S. in 2001 and
subsequent terrorist attacks in other parts of the world have created many economic and political uncertainties that
have adversely impacted the global economy and, as a result, have adversely affected our business. The long-term
effects of such attacks, of the recently increasing social and political instability in the Middle East and of the
ongoing war on terrorism on our business and the global economy remain unknown. Such uncertainty has tended to
increase the price of certain commodities, particularly oil, which could have an indirect adverse impact on the cost
of manufacturing our products. Moreover, the potential for future terrorist attacks makes it difficult to estimate the
long term stability and strength of the U.S. and other economies, particularly those in certain emerging market
countries, and the impact of resulting economic conditions on our business.

The markets in which we, our customers and our suppliers operate are subject to the risk of earthquakes
and other natural disasters.

Our headquarters and the majority of our operations are located in California, which is prone to earthquakes,
and some of the other locations in which we, our customers and suppliers conduct business are prone to natural
disasters. In the event that any of our business centers are affected by any such disasters, we may sustain damage to
our operations and properties and suffer significant financial losses. Furthermore, we rely on third-party manu-
facturers for the production of many of our products, and any significant disruption in the business or operations of
such manufacturers could adversely impact our business. In addition, if there is a major earthquake or other natural
disaster in any of the locations in which our significant customers are located, we face the risk that our customers
may incur losses, or sustained business interruption and/or loss, which may materially impair their ability to
continue their purchase of products from us. A major earthquake or other natural disaster in the markets in which
we, our customers or suppliers operate could have a material adverse effect on our business, financial condition,
results of operations and cash flows.

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

All of our facilities are leased, including our principal operations and corporate headquarters in San Jose,
California. We also have research and development centers in Oregon, New York and New Jersey, several sales
offices in the U.S., sales and support centers in Europe and Asia, and research and development centers in Israel and
Hong Kong. Our leases, which expire at various dates through December 2020, are for an aggregate of approx-
imately 429,000 square feet of space. In September 2010, we relocated our corporate headquarters to San Jose,
California, from Sunnyvale, California. The Sunnyvale lease terminated in September 2010. The San Jose lease has
a term of ten years and is for approximately 188,000 square feet of space. The San Jose facility houses our
manufacturing, research and development and corporate headquarters functions. We believe that the facilities that
we currently occupy are adequate for our current needs and that suitable additional space will be available, as
needed, to accommodate the presently foreseeable expansion of our operations.

Of our leased facilities, an aggregate of approximately 76,000 square feet is in the Omneon Sunnyvale office
and the Scopus New Jersey office and is in excess of our space requirements. We no longer occupy these facilities
and the estimated loss, net of potential estimated sublease income, for this square footage has been included in the
excess facilities charges recorded in the years ended December 31, 2010 and 2009. The Scopus New Jersey lease
terminates in May 2011 and the Omneon Sunnyvale lease terminates in June 2013.

Item 3. Legal Proceedings

On March 4, 2010, Interkey ELC Ltd, or Interkey, filed a lawsuit in Israel, alleging breach of contract against
Harmonic and Scopus Video Networks Ltd. (now Harmonic Video Networks Ltd. or “HVN”), which was acquired
by Harmonic in March 2009, and Harmonic. The plaintiffs are seeking damages in the amount of 6,300,000 ILS

(approximately $1.7 million). Harmonic believes Interkey’s and its shareholders claims are without merit and
Harmonic and HVN intend to vigorously defend themselves against these claims.

In May 2003, a derivative action, purporting to be on our behalf, was filed in the Superior Court for the County
of Santa Clara against certain current and former officers and directors. The derivative action alleged facts similar to
those alleged in the securities class action filed against Harmonic in 2000 and settled in 2008. The securities class
action alleged that, by making false or misleading statements regarding Harmonic’s prospects and customers and its
acquisition of C-Cube, certain defendants violated Sections 10(b) and 20(a) of the Exchange Act. The complaint in
the securities class action litigation also alleged that certain defendants violated Section 14(a) of the Exchange Act
and Sections 11, 12(a)(2), and 15 of the Securities Act, by filing a false or misleading registration statement,
prospectus, and joint proxy in connection with the C-Cube acquisition. In March 2009, the Court hearing the
derivative action granted final approval of a settlement in connection with the matter. The settlement released
Harmonic’s officers and directors from all claims brought in the derivative lawsuit, and the Company paid $550,000
to cover the plaintiff’s attorneys’ fees.

In July 2003, Stanford University and Litton Systems filed a complaint in U.S. District Court for the Central
District of California, alleging that optical fiber amplifiers incorporated into certain of Harmonic’s products
infringe U.S. Patent No. 4859016. This patent expired in September 2003. The complaint sought injunctive relief,
royalties and damages. In August 2007, the District Court granted our motion to dismiss. The plaintiffs appealed
this motion and, in June 2008, the U.S. Court of Appeals for the Federal Circuit issued a decision which vacated the
District Court’s decision and remanded for further proceedings. At a scheduling conference in September 2008, the
judge ordered the parties to mediation. Following the mediation sessions, Harmonic and Litton entered into a
settlement agreement in January 2009. The settlement agreement provides that, in exchange for a one-time lump
sum payment from Harmonic to Litton of $5 million, Litton (i) will not bring suit against Harmonic, any of its
affiliates, customers, vendors, representatives, distributors, or its contract manufacturers for any liability for
making, using, offering for sale, importing, and/or selling any Harmonic products that may have incorporated
technology that was alleged to have infringed on one or more of the relevant patents, and (ii) released Harmonic
from any liability for making, using or selling any Harmonic products that may have infringed on such patents. The
Company recorded a provision of $5.0 million in its selling, general and administrative expenses for the year ended
December 31, 2008. Harmonic paid the settlement amount in January 2009.

Harmonic is subject to other litigation incidental to its business that is not believed to be material to the

Company.

PART II

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

Equity Securities

a) Market information: Harmonic’s common stock is traded on the NASDAQ Global Market under the symbol
HLIT, and has been listed on NASDAQ since Harmonic’s initial public offering on May 22, 1995. The following
table sets forth, for the periods indicated, the high and low sales price per share of the Common Stock as reported on
the Nasdaq Global Market:

Year Ended
December 31,
High
Low

2009
First quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $7.00
7.85
Second quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.07
Third quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.84
Fourth quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2010
First quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $6.95
7.27
Second quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.14
Third quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.87
Fourth quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$4.46
5.07
5.24
4.77

$5.78
5.25
5.34
6.37

Holders of record: At February 11, 2011, there were 519 stockholders of record of Harmonic’s Common

Stock.

Dividends: Harmonic has never declared or paid any dividends on its capital stock. Harmonic currently
expects to retain future earnings, if any, for use in the operation and expansion of its business and does not anticipate
paying any cash dividends in the foreseeable future. Harmonic’s line of credit includes covenants prohibiting the
payment of cash dividends.

Securities authorized for issuance under equity compensation plans: The disclosure required by Item 201(d) of
Regulation S-K will be set forth in the 2011 Proxy Statement under the caption “Equity Plan Information” and is
incorporated herein by reference.

Sales of unregistered securities: Not applicable.

b) Use of proceeds: Not applicable.

c) Purchase of equity securities by the issuer and affiliated purchasers: During the year ended December 31

2010, neither Harmonic, nor any of its affiliated entities, repurchased any of Harmonic’s equity securities.

PERFORMANCE GRAPH

Set forth below is a line graph comparing the annual percentage change in the cumulative return to the
stockholders of the Company’s common stock with the cumulative return of the NASDAQ Telecommunications
Index and of the Standard & Poor’s (S&P) 500 Index for the period commencing December 31, 2005 and ending on
December 31, 2010. The graph assumes that $100 was invested in each of the Company’s common stock, the S&P
500 and the NASDAQ Telecommunications Index on December 31, 2005, and assumes the reinvestment of
dividends, if any. The comparisons shown in the graph below are based upon historical data. Harmonic cautions that
the stock price performance shown in the graph below is not indicative of, nor intended to forecast, the potential
future performance of the Company’s common stock.

Harmonic Inc.

NASDAQ Telecommunications Index

S&P 500 Index

350

300

250

200

150

100

S
R
A
L
L
O
D

2005

2006

2007

2008

2009

2010

Harmonic Inc.

NASDAQ Telecommunications Index

S&P 500 Index

12/31/05

12/31/06

12/31/07

12/31/08

12/31/09

12/31/10

100.0

149.90

216.08

115.67

130.52

176.70

131.50

146.22

115.80

122.16

85.43

76.96

118.25

129.78

97.33

111.99

Item 6. Selected Financial Data

The data set forth below are qualified in their entirety by reference to, and should be read in conjunction with,
“Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the Consolidated
Financial Statements and related notes included elsewhere in this Annual Report on Form 10-K.

2010

Year Ended December 31,
2008
(In thousands, except per share amounts)

2007

2009

Consolidated Statements of Operations Data
Net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gross profit . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income (loss) from operations . . . . . . . . . . . . . .
Net income (loss) . . . . . . . . . . . . . . . . . . . . . . .
Net income (loss) per share — basic . . . . . . . . .
Net income (loss) per share — diluted . . . . . . . .
Consolidated Balance Sheet Data
Cash, cash equivalents and short-term

investments. . . . . . . . . . . . . . . . . . . . . . . . . .
Working capital . . . . . . . . . . . . . . . . . . . . . . . .
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long term debt, including current portion . . . . .
Long-term financing liability . . . . . . . . . . . . . .
Stockholders’ equity . . . . . . . . . . . . . . . . . . . . .

$423,344
195,401
5,142
(4,335)
(0.04)
(0.04)

$319,566
134,360
(12,035)
(24,139)
(0.25)
(0.25)

$364,963
177,533
39,305
63,992
0.68
0.67

$120,371
217,898
720,386
—
—
520,203

$271,070
325,185
572,034
—
6,908
407,473

$327,163
375,131
564,363
—
—
414,317

$311,204
134,075
19,258
23,421
0.29
0.28

$269,260
283,276
475,779
—
—
334,413

2006

$247,684
101,446
(3,722)
1,007
0.01
0.01

$ 92,371
97,398
281,962
460
—
145,134

(cid:129) On September 15, 2010, we acquired Omneon, Inc. for a purchase price of $251.3 million, net of cash
acquired. The 2010 income from operations and net loss included a charge of $5.9 million for acquisition
costs related to the Omneon acquisition. See Note 3 “Acquisitions” of the Company’s Consolidated
Financial Statements for additional information.

(cid:129) In addition, the 2010 income from operations and net loss included approximately $3.0 million of excess
facilities charges, primarily related to the closure of the Omneon Sunnyvale office, and $1.6 million for
severance expenses.

(cid:129) On March 12, 2009, we acquired Scopus Video Networks for a purchase price of $63.1 million, net of cash
acquired. The 2009 loss from operations and net loss included a charge of $3.4 million for acquisition costs
related to the Scopus acquisition. See Note 3 “Acquisitions” of the Company’s Consolidated Financial
Statements for additional information.

(cid:129) In addition, the 2009 loss from operations and net loss included approximately $8.3 million of restructuring
charges related to the Scopus acquisition. These charges included approximately $6.3 million in cost of
revenue primarily related to provisions for excess and obsolete inventories of $5.8 million and $0.5 million
for severance and other expenses. Charges of approximately $2.0 million were recorded in operating
expenses related to the Scopus acquisition, consisting primarily of severance costs.

(cid:129) The 2008 income from operations and net income included a charge of $5.0 million for the settlement of a
patent infringement claim, a restructuring charge of $1.8 million on a reduction in estimated sublease
income for Sunnyvale, California and UK buildings and an impairment charge of $0.8 million on a short-
term investment. We also recognized a benefit from income taxes of $18.0 million resulting from the use of
net operating loss carryforwards and the release of the substantial majority of our income tax valuation
allowance.

(cid:129) On July 31, 2007, we acquired Rhozet Corporation for a purchase price of $16.2 million.

(cid:129) The 2007 income from operations and net income included a charge of $6.4 million for the settlement of the
securities class action lawsuit, a restructuring charge of $0.4 million on a reduction in estimated sublease

income for a Sunnyvale, California building and a charge of $0.5 million from the closure of the
manufacturing and research and development activities of Broadcast Technology Limited (“BTL”). This
was partially offset by a credit of $1.8 million from a revised estimate of expected sublease income due to the
extension of a sublease of a building to the lease expiration. The acquisition of Rhozet in July 2007 resulted
in a charge of $0.7 million related to the write-off of acquired in-process technology.

(cid:129) On January 1, 2007, we adopted revised accounting guidance for accounting for uncertainty in income taxes. The
effect of adopting this revised accounting guidance was an increase in the Company’s accumulated deficit of
$2.1 million for interest and penalties related to uncertain tax positions that existed at January 1, 2007.

(cid:129) In the fourth quarter of 2007, we sold and issued 12,500,000 shares of common stock in a public offering at a
price of $12.00 per share. Our net proceeds from the offering were approximately $141.8 million, which was
net of underwriters’ discounts and commissions of approximately $7.4 million and related legal, accounting,
printing and other costs totaling approximately $0.7 million. The net proceeds from the offering have been
used for general corporate purposes.

(cid:129) On December 8, 2006, we acquired Entone Technologies, Inc. for a purchase price of $48.9 million.

(cid:129) The 2006 gross profit, loss from operations and net income included a charge of $3.0 million for
restructuring charges associated with a management reduction and a campus consolidation. In addition,
an impairment charge of $1.0 million was recorded to write-off the remaining balance of the intangibles
from the BTL acquisition.

(cid:129) Income (loss) from operations for 2010, 2009, 2008, 2007 and 2006 included amortization of intangible

assets of $17.4 million, $11.9 million, $6.1 million, $5.3 million and $2.2 million, respectively.

(cid:129) Income (loss) from operations for 2010, 2009, 2008, 2007 and 2006 included stock-based compensation

expense of $15.5 million, $10.6 million, $7.8 million, $6.2 million and $5.8 million, respectively.

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

OVERVIEW

We design, manufacture and sell versatile and high performance video infrastructure products and system
solutions that enable our customers to efficiently create, prepare and deliver broadcast and on-demand video
services to televisions, personal computers and mobile devices. Historically, the majority of our sales have been
derived from sales of video processing solutions and network edge and access systems to cable television operators
and from sales of video processing solutions to direct-to-home satellite operators. More recently, we are providing
our video processing solutions to telecommunications companies, or telcos, broadcasters and other media
companies that create video programming or offer video services. In September 2010, we acquired Omneon,
Inc., a private, venture-backed company specializing in file-based infrastructure for the production, preparation and
playout of video content typically deployed by broadcasters, satellite operators, content owners and other media
companies. The acquisition of Omneon is complementary to Harmonic’s core business, expanding our customer
reach into content providers and extending our product lines into video servers and video-optimized storage for
content production and playout.

Harmonic’s net revenue increased by 32% in 2010 from 2009. The increase in net revenue in 2010, compared
to 2009, was in part due to stronger worldwide customer demand for video processing solutions. The growth in
video processing revenue of 25% also contributed to the growth in service and support activity related to the
associated video processing solutions, thus resulting in services and support revenue growth of 33% in 2010, when
compared to 2009. In addition, Harmonic’s revenue also increased as a result of the acquisition of Omneon in
September 2010 and its inclusion in our results from the date of acquisition. Omneon’s product revenue, which for
2010 was $32.6 million, is included in the production and playout product line. We also experienced an improved
gross margin percentage in 2010, compared to 2009, primarily due to a more favorable mix of revenue towards
higher gross margin products, such as video processing and production and playout. Further, when comparing 2010
to 2009, note that in 2009 we recorded a charge of approximately $6.3 million to cost of revenue, primarily
consisting of excess and obsolete inventories expenses from product discontinuances and severance expenses for

terminated Scopus employees, which lowered 2009 margins relative to 2010 margins. Our operating results in 2010
also included total charges of $8.9 million related to acquisition costs and excess facilities associated with the
Omneon purchase and subsequent consolidation of Omneon personnel into our San Jose, California facility.

Harmonic’s net revenue decreased by 12% in 2009 from 2008. The decrease in revenues in 2009, compared to
2008, was primarily due to weaker demand in 2009 from our domestic cable and satellite customers, and our
European cable customers, for edge products and solutions primarily related to VOD, switched digital video,
modular cable modem termination systems, or M-CMTS, deployments, and HDTV, offset by increased revenue
resulting from the acquisition of Scopus of $19.3 million. We experienced a lower gross margin percentage in 2009,
compared to 2008, primarily due to the previously mentioned charge to cost of revenue in 2009 associated with the
Scopus operations, lower gross margins on sales of edge and access products due to competitive pricing pressures
and the deployment of our then current NSG platform, which platform carries lower initial gross margins than our
average gross margins, and increased amortization of intangibles expense. Our operating results in 2009 included a
charge of $3.4 million for acquisition costs associated with the Scopus acquisition.

Financial difficulties of certain of our customers and changes in our customers’ deployment plans have
adversely affected our business in the past. In 2008 and 2009, economic conditions in many of the countries in
which we sell products were very weak, and global economic conditions and financial markets experienced a severe
downturn. The downturn stemmed from a multitude of factors, including adverse credit conditions, slower
economic activity, concerns about inflation and deflation, rapid changes in foreign exchange rates, increased
energy costs, decreased consumer confidence, reduced corporate profits and capital spending, adverse business
conditions and liquidity concerns.

Although there was an increase in global economic activity in 2010, economic growth may remain sluggish
during 2011 in a few developed countries and in some emerging market countries. The severity or length of time that
these adverse economic and financial market conditions may persist, or whether such adverse conditions may return
in the U.S. and in other countries, is unknown. During challenging or uncertain economic times, and in tight credit
markets, many customers may delay or reduce capital expenditures, which in turn often results in lower demand for
our products.

Sales to customers outside of the U.S. in 2010, 2009, and 2008 represented 50%, 49%, and 44% of net revenue,
respectively. A significant portion of international sales are made to distributors and system integrators, which are
generally responsible for importing the products and providing installation and technical support and service to
customers within their territory. We expect international sales to continue to account for a substantial portion of our
net revenue for the foreseeable future, and expect that, partially as a result of the acquisitions of Scopus and
Omneon, our international sales may increase.

Further, we have a number of international customers to whom sales are denominated in U.S. dollars. Sales
denominated in foreign currencies were approximately 6%, 7% and 6% of net revenue in 2010, 2009 and 2008,
respectively. The value of the U.S. dollar fluctuates significantly against many foreign currencies, which includes
the local currencies of many of our international customers. If the U.S. dollar appreciates relative to the local
currencies of our customers, then the prices of our products correspondingly increase for such customers. Such an
effect could adversely impact sales of our products to such customers and result in longer sales cycles, difficulties in
collection of accounts receivable, slower adoption of new technologies and increased price competition in the
affected countries. Further, if the U.S. dollar were to weaken against many major currencies, there can be no
assurance that a weaker dollar would lead to growth in capital spending.

In addition, industry consolidation has in the past constrained, and may in the future constrain, capital spending
by our customers. Also, if our product portfolio and product development plans do not position us well to capture an
increased portion of the capital spending of customers in the markets on which we focus, our revenue may decline.

2010, 2009 and 2008 accounted for approximately 44%, 47% and 58% of revenue, respectively. Although we are
attempting to broaden our customer base by penetrating new markets and further expanding internationally, we
expect to see continuing industry consolidation and customer concentration.

During 2010, 2009 and 2008, revenue from Comcast accounted for 17%, 16% and 20%, respectively, of our
revenue. Sales to EchoStar accounted for 12% of net revenue in 2008. The loss of Comcast or any other significant
customer, any material reduction in orders by Comcast or any significant customer, or our failure to qualify our new
products with a significant customer could materially and adversely affect our operating results, financial condition
and cash flows. In addition, we are involved in most quarters in one or more relatively large individual transactions,
including, from time to time, projects in which we act much like a systems integrator. A decrease in the number of
the relatively larger individual transactions in which we are involved in any quarter could adversely affect our
operating results for that quarter.

On September 15, 2010, Harmonic completed the acquisition of Omneon, Inc., a private, venture-backed
company organized under the laws of Delaware and headquartered in Sunnyvale, California. The purchase price,
net of $40.5 million of cash acquired, was $251.3 million, which consisted of (i) approximately $153.3 million in
cash, net of cash acquired, (ii) 14.2 million shares of Harmonic common stock with a total fair value of
approximately $95.9 million, based on the price of Harmonic common stock at the time of close, and (iii) approx-
imately $2.1 million, representing the fair value attributed to shares of Omneon equity awards which Harmonic
assumed and for which services had already been rendered as of the close of the acquisition. The cash portion of the
purchase price was paid from existing cash balances. The Company also incurred a total of $5.9 million of
transaction expenses, which were expensed as selling, general and administrative expenses in the year ended
December 31, 2010. Substantially all unvested stock options and unvested restricted stock units issued by Omneon
and outstanding at closing were assumed by Harmonic. The acquisition of Omneon is complementary to
Harmonic’s core business, expanding our customer reach into content providers and extending our product lines
into video servers and video-optimized storage for content production and playout.

On March 12, 2009, Harmonic completed its acquisition of Scopus Video Networks Ltd., a publicly traded
company organized under the laws of Israel. The purchase price, net of $23.3 million of cash acquired, was
$63.1 million, which was paid from existing cash balances. The Company also incurred a total of $3.4 million of
transaction expenses, which were expensed as selling, general and administrative expenses in the first quarter of
2009. The acquisition of Scopus was intended to extend Harmonic’s worldwide customer base and strengthen its
market and technology leadership, particularly in video broadcast in international markets, and the contribution and
distribution markets.

In the fourth quarter of 2010, the Company recorded a charge, net of estimated sublease income, of
$3.0 million in selling, general and administrative expenses for excess facilities related to the closure of Omneon’s
leased premises in Sunnyvale, California. The employees were moved into Harmonic’s nearby San Jose, California
corporate headquarters during the fourth quarter.

We continue to expand our international operations and staffing to better support our expansion into
international markets. This expansion includes the implementation of an international structure that includes,
among other things, an international support center in Europe, a research and development cost-sharing arrange-
ment, and certain licenses and other contractual arrangements by and among the Company and its wholly-owned
domestic and foreign subsidiaries. Our foreign subsidiaries have acquired certain license rights to use our existing
intellectual property and intellectual property that will be developed or licensed in the future, including Omneon’s
existing and future intellectual property. As a result of these changes and an expanding customer base interna-
tionally, we expect that an increasing percentage of our consolidated pre-tax income will be derived from, and
reinvested in, our international operations. We anticipate that this pre-tax income will be subject to foreign tax at
relatively lower tax rates when compared to the United States federal statutory tax rate in future periods.

CRITICAL ACCOUNTING POLICIES, JUDGMENTS AND ESTIMATES

The preparation of financial statements and related disclosures requires Harmonic to make judgments,
assumptions and estimates that affect the reported amounts of assets and liabilities, the disclosure of contingencies
and the reported amounts of revenue and expenses in the financial statements and accompanying notes. Material
differences may result in the amount and timing of revenue and expenses if different judgments or different
estimates were made. See Note 1 of Notes to Consolidated Financial Statements for details of Harmonic’s
accounting policies. Critical accounting policies, judgments and estimates which we believe have the most
significant impact on Harmonic’s financial statements are set forth below:

(cid:129) Revenue recognition;

(cid:129) Allowances for doubtful accounts, returns and discounts;

(cid:129) Valuation of inventories;

(cid:129) Impairment of goodwill or long-lived assets;

(cid:129) Restructuring costs and accruals for excess facilities;

(cid:129) Assessment of the probability of the outcome of current litigation;

(cid:129) Accounting for income taxes; and

(cid:129) Stock-based compensation.

REVENUE RECOGNITION

Harmonic’s principal sources of revenue are from sales of hardware products, software products, solution
sales, services and hardware and software maintenance agreements. Harmonic recognizes revenue when persuasive
evidence of an arrangement exists, delivery has occurred or services have been provided, the sale price is fixed or
determinable, collection is reasonably assured, and risk of loss and title have transferred to the customer.

We generally use contracts and customer purchase orders to determine the existence of an arrangement.
Shipping documents and customer acceptance, when applicable, are used to verify delivery. We assess whether the
sales price is fixed or determinable based on the payment terms associated with the transaction and whether the
price is subject to refund or adjustment. We assess collectability based primarily on the creditworthiness of the
customer as determined by credit checks and analysis, as well as the customer’s payment history.

We evaluate our products to assess whether software is more-than-incidental to a product. When we conclude
that software is more-than-incidental to a product, we account for the product as a software product. Revenue on
software products and software-related elements are recognized in accordance with applicable accounting guid-
ance. Significant judgment may be required in determining whether a product is a software or hardware product.

Revenue from hardware product sales is recognized in accordance with the applicable accounting guidance on
revenue recognition. Subject to other revenue recognition provisions, revenue on hardware product sales is
recognized when risk of loss and title has transferred, which is generally upon shipment or delivery, based on the
terms of the arrangement. Revenue on shipments to distributors, resellers and systems integrators is generally

recognized on delivery. Allowances are provided for estimated returns and discounts. Such allowances are adjusted
periodically to reflect actual and anticipated experience.

Distributors and systems integrators purchase our products for specific capital equipment projects of the end-
user and do not hold inventory. They perform functions that include importation, delivery to the end-customer,
installation or integration, and post-sales service and support. Our agreements with these distributors and systems
integrators have terms which are generally consistent with the standard terms and conditions for the sale of our
equipment to end users and do not provide for product rotation or pricing allowances, as are typically found in
agreements with stocking distributors. We have long-term relationships with most of these distributors and systems
integrators and substantial experience with similar sales of similar products. We do have instances of accepting
product returns from distributors and system integrators. However, such returns typically occur in instances where
the system integrator has designed a product into a project for the end user, but the integrator requests permission to
return the component as it does not meet the specific project’s functional requirements. Such returns are made solely
at the discretion of the Company, as our agreements with distributors and system integrators do not provide for
return rights. We have extensive experience monitoring product returns from our distributors, and accordingly, we
have concluded that the amount of future returns can be reasonably estimated in accordance with applicable
accounting guidance. With respect to sales to distributors and system integrators, we evaluate the terms of sale and
recognize revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been
provided, the sales price is fixed or determinable, collectability is reasonably assured, and risk of loss and title have
transferred.

When arrangements contain multiple elements, Harmonic evaluates all deliverables in the arrangement at the
outset of the arrangement based on the applicable accounting guidance for revenue arrangements with multiple
deliverables. If the undelivered elements qualify as separate units of accounting based on the applicable accounting
guidance, which include that the delivered elements have value to the customer on a stand-alone basis and that
objective and reliable evidence of fair value exists for undelivered elements, Harmonic allocates the arrangement
fee based on the relative fair value of the elements of the arrangement. If a delivered element does not meet the
criteria in the applicable accounting guidance to be considered a separate unit of accounting, revenue is deferred
until the undelivered elements are fulfilled. We establish fair value by reference to the price the customer is required
to pay when an item is sold separately using contractually stated, substantive renewal rates, when applicable, or the
average price of recently completed stand alone sales transactions. Accordingly, the determination as to whether
appropriate objective and reliable evidence of fair value exists can impact the timing of revenue recognition for an
arrangement.

For multiple element arrangements that include both hardware products and software products, Harmonic
evaluates the arrangement based on the applicable accounting guidance for non-software deliverables in an
arrangement containing more-than-incidental software. In accordance with the applicable accounting guidance, the
arrangement is divided between software-related elements and non-software deliverables. Software-related ele-
ments are accounted for as software, and include all non-software deliverables for which a software deliverable is
essential to its functionality. When software arrangements contain multiple elements and vendor specific objective
evidence, or VSOE, of fair value exists for all undelivered elements, Harmonic accounts for the delivered elements
using the residual method. In arrangements where VSOE of fair value is not available for all undelivered elements,
we defer the recognition of all revenue until all elements, except post contract support, have been delivered. When
post contract support is the only undelivered element for such contracts, revenue is then recognized using the
residual method. Fair value of software-related elements is based on separate sales to other customers or upon
renewal rates quoted in contracts when the quoted renewal rates are deemed to be substantive.

We also enter into solution sales for the design, manufacture, test, integration and installation of products to the
specifications of Harmonic’s customers, including equipment acquired from third parties to be integrated with
Harmonic’s products. These arrangements typically include the configuration of system interfaces between
Harmonic product and customer/third party equipment, and optimization of the overall solution to operate with
the unique features of the customer’s design and to meet customer-specific performance requirements. Revenue on
these arrangements is generally recognized using the percentage-of-completion method in accordance with
applicable accounting guidance on accounting for performance of construction/production contracts. We measure
performance under the percentage-of-completion method using the efforts-expended method based on current

estimates of labor hours to complete the project. Management believes that, for each such project, labor hours
expended in proportion to total estimated hours at completion represents the most reliable and meaningful measure
for determining a project’s progress toward completion. If the estimated costs to complete a project exceed the total
contract amount, indicating a loss, the entire anticipated loss is recognized. Deferred revenue includes billings in
excess of revenue recognized, net of deferred costs of sales. Our application of percentage-of-completion
accounting is subject to our estimates of labor hours to complete each project. In the event that actual results
differ from these estimates or we adjust these estimates in future periods, our operating results, financial position or
cash flows for a particular period could be adversely affected.

Revenue from hardware and software maintenance agreements is recognized ratably over the term of the
maintenance agreement. First year maintenance typically is included in the original arrangement and renewed on an
annual basis thereafter. Services revenue is recognized on performance of the services and costs associated with
services are recognized as incurred. Fair value of services such as consulting and training is based upon stand alone
sales of these services.

Significant management judgments and estimates must be made in connection with determination of the
revenue to be recognized in any accounting period. Because of the concentrated nature of our customer base,
different judgments or estimates made for any one large contract or customer could result in material differences in
the amount and timing of revenue recognized in any particular period.

ALLOWANCES FOR DOUBTFUL ACCOUNTS, RETURNS AND DISCOUNTS

We establish allowances for doubtful accounts, returns and discounts based on credit profiles of our customers,
current economic trends, contractual terms and conditions and historical payment, return and discount experience,
as well as for known or expected events. If there were to be a deterioration of a major customer’s creditworthiness or
if actual defaults, returns or discounts were higher than our historical experience, our operating results, financial
position and cash flows could be adversely affected. At December 31, 2010, our allowances for doubtful accounts,
returns and discounts totaled $5.9 million.

VALUATION OF INVENTORIES

Harmonic states inventories at the lower of cost or market. We write down the cost of excess or obsolete
inventory to net realizable value based on future demand forecasts and historical consumption. If there were to be a
sudden and significant decrease in demand for our products, or if there were a higher incidence of inventory
obsolescence because of rapidly changing technology and customer requirements, we could be required to record
additional charges for excess and obsolete inventory and our gross margin could be adversely affected. Inventory
management is of critical importance in order to balance the need to maintain strategic inventory levels to ensure
competitive lead times against the risk of inventory obsolescence because of rapidly changing technology and
customer requirements.

IMPAIRMENT OF GOODWILL OR LONG-LIVED ASSETS

We perform an evaluation of the carrying value of goodwill on an annual basis in the fourth quarter and of long-
lived assets, such as intangibles, whenever we become aware of an event or change in circumstances that would
indicate potential impairment. We evaluate the recoverability of goodwill on the basis of market capitalization
adjusted for a control premium and, if necessary, discounted cash flows on the Company level, which is the sole
reporting unit. We evaluate the recoverability of intangible assets and other long-lived assets on the basis of
undiscounted cash flows from each asset group. If impairment is indicated, provisions for impairment are
determined based on fair value, principally using discounted cash flows. For example, changes in industry and
market conditions or the strategic realignment of our resources could result in an impairment of identified
intangibles, goodwill or long-lived assets. We did not record an impairment charge as a result of our goodwill
impairment test in 2010. There can be no assurance that future impairment tests will not result in a charge to
earnings. At December 31, 2010, our carrying values for goodwill and intangible assets totaled $211.9 million and
$118.1 million, respectively.

RESTRUCTURING COSTS AND ACCRUALS FOR EXCESS FACILITIES

Harmonic applies applicable accounting guidance which requires that a liability for costs associated with
restructuring activities, including an exit or disposal activity, be recognized and measured initially at fair value
when the liability is incurred. Harmonic’s restructuring activities have primarily been related to excess facilities.
Harmonic determines the excess facilities accrual based on expected cash payments, under the applicable facility
lease, reduced by any estimated sublease rental income for such facility. In the event that Harmonic is unable to
achieve expected levels of sublease rental income, it will need to revise its estimate of the liability, which could
materially impact our operating results, financial position or cash flows. At December 31, 2010, our accrual for
excess facilities totaled $2.9 million.

ASSESSMENT OF THE PROBABILITY OF THE OUTCOME OF CURRENT LITIGATION

Harmonic records accruals for loss contingencies when it is probable that a liability has been incurred and the
amount of loss can be reasonably estimated. In connection with a pending litigation matter, the Company recorded a
$1.3 million liability in the fourth quarter of 2010 based on management’s determination of the Company’s
probable and estimable exposure in the matter. Based on an agreement entered into on January 15, 2009 to settle its
then outstanding patent infringement litigation, Harmonic believed that a probable and estimable liability had been
incurred, and, accordingly, recorded a provision for $5.0 million in its statement of operations for the year ended
December 31, 2008.

In other pending litigation, Harmonic believes that it either has meritorious defenses with respect to those
actions and claims or is unable to predict the impact of an adverse action and, accordingly, no loss contingencies for
those matters have been accrued. There can be no assurance, however, that we will prevail. An unfavorable outcome
of legal proceedings could have a material adverse effect on our business, financial position, operating results or
cash flows.

ACCOUNTING FOR INCOME TAXES

In preparing our financial statements, we estimate our income taxes for each of the jurisdictions in which we
operate. This involves estimating our actual current tax exposures and assessing temporary differences resulting
from differing treatment of items, such as reserves and accruals, for tax and accounting purposes. These differences
result in deferred tax assets and liabilities, which are included within our consolidated balance sheet.

Significant management judgment is required in determining our provision for income taxes, our deferred tax
assets and liabilities and our future taxable income for purposes of assessing our ability to realize any future benefit
from our deferred tax assets. In the event that actual results differ from these estimates or we adjust these estimates
in future periods, our operating results and financial position could be materially affected. During the year ended
December 31, 2008, a full release of the valuation allowance against our net deferred tax assets in the United States
and certain foreign jurisdictions, based on our judgment that it is more-likely-than-not that our deferred tax assets in
the United States and certain foreign jurisdictions will be recovered from future taxable income, resulted in a benefit
from income taxes of $53.5 million recorded in our Consolidated Statements of Operations and a $3.3 million
reduction in goodwill.

We are subject to examination of our income tax returns by various tax authorities on a periodic basis. We
regularly assess the likelihood of adverse outcomes resulting from such examinations to determine the adequacy of
our provision for income taxes. We apply the provisions of the applicable accounting guidance regarding
accounting for uncertainty in income taxes which requires application of a more-likely-than-not threshold to
the recognition and derecognition of uncertain tax positions. If the recognition threshold is met, the applicable
accounting guidance permits us to recognize a tax benefit measured at the largest amount of tax benefit that, in our
judgment, is more than fifty percent likely to be realized upon settlement. It further requires that a change in
judgment related to the expected ultimate resolution of uncertain tax positions be recognized in earnings in the
quarter of such change. We have been notified by the Internal Revenue Service that our 2008 and 2009
U.S. corporate income tax returns have been selected for audit, which is expected to commence in the second
quarter of 2011. If upon the conclusion of these audits, the ultimate determination of taxes owed in the U.S. is for an

amount in excess of the tax provision we have recorded in the applicable period, our overall tax expense, effective
tax rate and cash flows could be adversely impacted in the period of adjustment.

We file annual income tax returns in multiple taxing jurisdictions around the world. A number of years may
elapse before an uncertain tax position is audited and finally resolved. While it is often difficult to predict the final
outcome or the timing of resolution of any particular uncertain tax position, we believe that our reserves for income
taxes reflect the most likely outcome. We adjust these reserves as well as the related interest and penalties, in light of
changing facts and circumstances. If our estimate of tax liabilities proves to be less than the ultimate assessment, a
further charge to expense would result. If payment of these amounts ultimately proves to be unnecessary, the
reversal of the liabilities would result in tax benefits being recognized in the period when we determine the
liabilities are no longer necessary. Any changes in estimate, or settlement of any particular position, could have a
material impact on our operating results, financial condition and cash flows.

STOCK-BASED COMPENSATION

Harmonic measures and recognizes compensation expense for all share-based payment awards made to
employees and directors, including stock options, restricted stock units and awards related to our Employee Stock
Purchase Plan (“ESPP”) based upon the grant-date fair value of those awards.

Stock-based compensation expense recognized under applicable accounting guidance on share-based pay-
ments for the years ended December 31, 2010, 2009 and 2008 was $15.5 million, $10.6 million and $7.8 million,
respectively.

Applicable accounting guidance requires companies to estimate the fair value of share-based payment awards
on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense
over the requisite service period in the Company’s Consolidated Statements of Operations.

The fair value of stock options is estimated at grant date using the Black-Scholes option pricing model. The
Company’s determination of fair value of stock options on the date of grant, using an option-pricing model, is
affected by the Company’s stock price as well as the assumptions regarding a number of highly complex and
subjective variables. These variables include, but are not limited to, the Company’s expected stock price volatility
over the term of the awards and actual and projected employee stock option exercise behaviors. The fair value of
each restricted stock unit grant is based on the underlying value of the Company’s common stock on the date of
grant.

RESULTS OF OPERATIONS

Harmonic’s historical consolidated statements of operations data for each of the three years ended Decem-

ber 31, 2010, 2009, and 2008, as a percentage of net revenue, are as follows:

Year Ended
December 31,
2009

2008

2010

Net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cost of revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

100% 100% 100%
58
54

Gross profit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating expenses:
Research and development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selling, general and administrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amortization of intangibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total operating expenses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18
26
1

1
Income (loss) from operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest and other income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —

Income (loss) before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for (benefit from) income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1
2

19
26
1

(4)
1

(3)
5

15
23
—

11
2

13
(5)

Net income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(1)% (8)% 18%

Net Revenue

Net Revenue — Consolidated

Harmonic’s consolidated net revenue, by product line, for each of the three years ended December 31, 2010,
2009 and 2008 are presented in the table below. Also presented is the related dollar and percentage change in
consolidated net revenue, by product line, as compared with the prior year, for each of the two years ended
December 31, 2010 and 2009.

Year Ended December 31,
2010
2008
2009
(In thousands, except percentages)

Revenue by type:
Video processing products . . . . . . . . . . . . . . . . . . . . . . . . . . . . $202,898
32,579
Production and playout products . . . . . . . . . . . . . . . . . . . . . . . .
135,306
Edge and access products . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
52,561
Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$162,654
—
117,355
39,557

$165,885
—
165,246
33,832

Net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $423,344

$319,566

$364,963

Increase (decrease):
Video processing products . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 40,244
32,579
Production and playout products . . . . . . . . . . . . . . . . . . . . . . . .
17,951
Edge and access products . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13,004
Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ (3,231)
—
(47,891)
5,725

Total increase (decrease): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $103,778

$ (45,397)

Percent change:
Video processing change . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Production and playout change . . . . . . . . . . . . . . . . . . . . . . . . .
Edge and access change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service and support change . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24.7%
—
15.3%
32.9%
32.5%

(1.9)%
—
(29.0)%
16.9%
(12.4)%

The increase in net revenue in 2010, compared to 2009, was in part due to stronger worldwide customer
demand for video processing solutions. The growth in video processing revenue of 24.7% also contributed to the
growth in service and support activity related to the associated video processing solutions, thus resulting in services
and support revenue growth of 32.9% in 2010, when compared to 2009. Services and support revenue is derived
mainly from maintenance agreements, system integration services and customer repairs. In addition, net revenue
increased as a result of the acquisition of Omneon in September 2010 and the inclusion of Omneon’s results from
the date of acquisition. Omneon’s product revenue is included in the production and playout product line. Our edge
and access product line increased 15.3% from 2009 to 2010 due to an increase in sales of our NSG edge QAM
devices. Net revenue decreased in 2009, compared to 2008, principally due to, in 2009, weaker demand from
domestic satellite operators and cable operators for their VOD and HDTV deployments and a decrease in sales to
customers internationally. The sales of video processing products were lower in 2009, compared to 2008, primarily
due to lower purchases of our products by domestic cable and satellite customers and our European cable customers.
The decrease in sales of edge and access products in 2009, compared to 2008, was primarily due to a decrease of
approximately $33.6 million in sales of our NSG edge QAM devices for VOD, switched digital and CMTS
deployments by domestic and international cable operators. The sales of service and support were higher in 2009,
compared to 2008, primarily due to increases in support revenue arising from 2008 sales.

Net Revenue — Geographic

Harmonic’s domestic and international net revenue for each of the three years ended December 31, 2010, 2009
and 2008 are presented in the table below. Also presented are the related dollar and percentage change in domestic
and international net revenue, as compared with the prior year, for each of the two years ended December 31, 2010
and 2009.

Year Ended December 31,
2010
2008
2009
(In thousands, except percentages)

Geographic Sales Data:
U.S.
International. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $209,583
213,761

$162,023
157,543

$205,163
159,800

Net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $423,344

$319,566

$364,963

U.S. increase (decrease) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 47,560
56,218
International increase (decrease) . . . . . . . . . . . . . . . . . . . . . . . .

$ (43,140)
(2,257)

Total increase (decrease) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $103,778

$ (45,397)

U.S. percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International percent change . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

29.4%
35.7%
32.5%

(21.0)%
(1.4)%
(12.4)%

Net revenue in the U.S. increased in 2010, compared to 2009, primarily due to stronger demand for our
products from our domestic cable operators for VOD and HDTV deployments. International net revenue in 2010
increased 35.7%, compared to 2009. Our international net revenue growth was particularly strong in Europe, but
also reflected the results of the increased share of international video broadcast business in emerging markets that
the Company had targeted as part of its acquisition of Scopus. Additionally, a portion of the increased international
net revenue toward the end of 2010 can be attributed to the production and playout (Omneon) business, given that a
substantial majority of production and playout revenues were international. We expect that international revenues
will continue to account for a substantial portion of our net revenue for the foreseeable future, and expect that, with
the completion of the acquisitions of Omneon and Scopus, our international net revenue may increase.

Net revenue in the U.S. decreased in 2009, compared to 2008, primarily due to weaker demand for our products
from our domestic satellite and cable operators for VOD and HDTV deployments. International revenues in 2009
decreased, compared to 2008, primarily due to weaker demand from cable operators, particularly in the European
markets, and offset somewhat by increases in Asian markets, partly as a result of our sales of Scopus products
following the completion of our acquisition of Scopus in March 2009.

Gross Profit

Harmonic’s gross profit and gross profit as a percentage of net revenue, for each of the three years ended
December 31, 2010, 2009, and 2008 are presented in the table below. Also presented is the related dollar and
percentage change in gross profit, as compared with the prior year, for each of the two years ended December 31,
2010 and 2009.

Gross profit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $195,401
As a % of net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase (decrease) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 61,041
Percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

45.4%

46.2%

48.6%

42.0%
$ (43,173)

(24.3)%

Year Ended December 31,
2010
2008
2009
(In thousands, except percentages)
$134,360

$177,533

The increase in gross profit in 2010, compared to 2009, was primarily due to increased net revenue. The gross
profit percentage of 46.2% in 2010, compared to 42.0% in 2009, was higher primarily due to a more favorable mix
of net revenue towards higher gross margin products, such as video processing products and production and playout
products. Also during 2010, our provision for excess and obsolete inventories declined from 2009 levels. In 2009,
we had recorded inventory provisions totaling $6.3 million, after the acquisition of Scopus, related to the
discontinuance of certain Scopus product lines. The increase in gross margins was partially offset by a $4.5 million
increase in amortization of intangibles in 2010. In 2010 and 2009, approximately $12.5 million and $8.0 million,

respectively, of expense related to amortization of intangibles was included in cost of revenue. We expect to record a
total of approximately $21.6 million in amortization of intangibles expense in cost of revenue in 2011 related to the
acquisitions of Omneon, Scopus and Rhozet.

The decrease in gross profit in 2009, compared to 2008, was primarily due to a $45.4 million decrease in net
revenue, lower gross margins on sales of edge and access products due to competitive pricing pressures, the
deployment of our new NSG platform, which carries lower initial gross margins than our average gross margins,
provisions totaling $6.3 million for excess and obsolete inventories associated with the discontinuance of certain
Scopus product lines, the incurrence of manufacturing overhead costs of $3.5 million associated with the Scopus
operations, and an increase of $2.5 million from amortization of intangibles expense. The gross profit percentage of
42.0% in 2009, compared to 48.6% in 2008, was lower primarily due to lower gross margins on sales of edge and
access products, increased provisions for excess and obsolete inventories, primarily related to the Scopus
acquisition, the incurrence of manufacturing overhead costs associated with the Scopus operations, and increased
amortization of intangible assets expense. In 2009, $8.0 million related to amortization of intangibles expense was
included in cost of revenue, compared to $5.5 million in 2008.

Research and Development

Harmonic’s research and development expense and the expense as a percentage of net revenue for each of the
three years ended December 31, 2010, 2009, and 2008 are presented in the table below. Also presented is the related
dollar and percentage change in research and development expense, as compared with the prior year, for each of the
two years ended December 31, 2010 and 2009.

Research and development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
As a % of net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2010

Year Ended December 31,
2009
(In thousands, except percentages)
$54,471
$61,435
$77,197

2008

18.2%

19.2%

14.9%

$15,762

$ 6,964

25.7%

12.8%

The increase in research and development expense in 2010, compared to 2009, was primarily the result of
increased compensation expense of $7.0 million, increased consulting and outside services expense of $1.8 million,
increased facilities and depreciation expenses of $2.0 million, increased stock-based compensation expense of
$1.2 million and increased prototype material expense of $0.6 million. The increased compensation costs in 2010
were primarily due to the increased headcount, primarily as a result of the acquisition of Omneon, and salary
increases for research and development employees during the year.

The increase in research and development expense in 2009, compared to 2008, was the result of increased
compensation expense of $4.4 million, increased stock-based compensation expense of $1.0 million, increased
depreciation expense of $0.8 million, and increased consulting and outside services expense of $0.6 million. The
increased compensation costs in 2009 were primarily due to increased headcount, which was primarily related to
the Scopus acquisition. The increased stock-based compensation expense and depreciation expense were also
primarily due to the acquisition of Scopus.

Selling, General and Administrative

Harmonic’s selling, general and administrative expense, and the expense as a percentage of net revenue, for
each of the three years ended December 31, 2010, 2009, and 2008 are presented in the table below. Also presented is
the related dollar and percentage change in selling, general and administrative expense, as compared with the prior
year, for each of the two years ended December 31, 2010 and 2009.

Selling, general and administrative . . . . . . . . . . . . . . . . . . . . . . . .
As a % of net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase (decrease). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2010

Year Ended December 31,
2008
2009
(In thousands, except percentages)
$81,138

$108,150

$83,118

25.5%

25.4%

22.8%

$ 27,012

$ (1,980)

33.3%

(2.4)%

The increase in selling, general and administrative expense in 2010, compared to 2009, was primarily due to
higher compensation expense of $12.0 million, higher legal and accounting expense of $2.0 million, excess
facilities charges of $3.0 million, higher acquisition-related expense of $2.9 million associated with the acquisition
of Omneon, higher travel and entertainment expense of $1.6 million, and higher stock-based compensation expense
of $3.8 million. The higher compensation, travel and entertainment, and stock-based compensation expenses were
primarily attributable to increased headcount as a result of the Omneon acquisition, in addition to higher incentive
compensation as a result of the substantial increase in revenue in 2010. The increase in excess facilities charges was
related to the closure of Omneon’s Sunnyvale, California facility, net of estimated sublease income. Additionally, in
connection with a pending litigation matter, the Company recorded a charge of $0.9 million to selling, general and
administrative expense in 2010 based on management’s determination of the Company’s probable and estimable
exposure in the matter.

The decrease in selling, general and administrative expense in 2009, compared to 2008, was primarily due to
lower litigation settlement expense of $5.0 million, lower bad debt expense of $1.6 million, lower legal expense of
$1.6 million, lower excess facilities charges of $1.3 million, lower consulting expense of $0.5 million, and lower
depreciation expense of $0.5 million, which increase was partially offset by higher acquisition costs of $3.4 million
associated with the Scopus acquisition, higher compensation expenses of $2.0 million, higher information
technology expense of $1.8 million, and higher stock-based compensation expense of $1.4 million. The higher
compensation expense was primarily related to increased headcount, principally due to the additional personnel that
we hired as a result of the acquisition of Scopus in March 2009, which increase was partially offset by lower
incentive compensation. The increased information technology expense was primarily due to the implementation
and maintenance of enterprise software systems in the sales and marketing areas. The increased stock-based
compensation expense was also primarily due to the acquisition of Scopus.

Amortization of Intangibles

Harmonic’s amortization of intangibles expense charged to operating expenses, and the amortization of
intangibles expense as a percentage of net revenue, for each of the three years ended December 31, 2010, 2009, and
2008, are presented in the table below. Also presented is the related dollar and percentage change in amortization of
intangibles expense, as compared with the prior year, for each of the two years ended December 31, 2010 and 2009.

Amortization of intangibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
As a % of net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,
2009
2010
(In thousands, except
percentages)
$3,822

$4,912

2008

$639

1.2%

1.2% 0.2%

$1,090

$3,183

28.5% 498.1%

The increase in amortization of intangibles expense in 2010 compared to 2009 was due to the amortization of
intangibles related to the acquisition of Omneon in September 2010. Harmonic expects to record a total of
approximately $8.9 million in amortization of intangibles expense in operating expenses in 2011, relating primarily
to the acquisitions of Omneon and Scopus. Additional amortization of intangibles in cost of revenue is expected
following the completion of the in-process research and development projects of Omneon.

The increase in amortization of intangibles expense in 2009, compared to 2008, was due to the amortization of

intangibles related to the acquisition of Scopus in March 2009.

Interest Income, Net

Harmonic’s interest income, net, and interest income, net as a percentage of net revenue, for each of the three
years ended December 31, 2010, 2009, and 2008, are presented in the table below. Also presented is the related
dollar and percentage change in interest income, net, as compared with the prior year, for each of the two years
ended December 31, 2010 and 2009.

Interest income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
As a % of net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase (decrease) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2010

Year Ended December 31,
2009
(In thousands, except percentages)
$9,216
$ 3,181
$ 1,082

2008

0.3%
$(2,099)

1.0%

2.5%

$(6,035)

(66.0)% (65.5)%

The decrease in interest income, net in 2010, compared to 2009, was primarily due to lower interest rates on the
cash and short-term investments portfolio and a lower portfolio balance during the year, principally resulting from
cash used in the Omneon acquisition, offset by increases in cash from operations. For the same reason, our interest
income, net, decreased in 2009, compared to 2008, principally resulting from cash used in the Scopus acquisition,
offset by cash from operations.

Other Expense, Net

Harmonic’s other expense, net, and other expense, net, as a percentage of net revenue, for each of the three
years ended December 31, 2010, 2009, and 2008 are presented in the table below. Also presented is the related
dollar and percentage change in interest and other expense, net, as compared with the prior year, for each of the two
years ended December 31, 2010 and 2009.

Other expense, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
As a % of net revenue. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Decrease. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2010

Year Ended December 31,
2009
2008
(In thousands, except
percentages)
$ 881

$2,552

$ 785

0.2%

0.3%

0.7%

$1,671

$ 96
10.9% 65.5%

The slight decrease in other expense, net, in 2010, compared to 2009, was primarily due to lower indirect taxes,

partially offset by an increase in foreign exchange losses on accounts receivable balances.

The decrease in other expense, net, in 2009, compared to 2008, was primarily due to lower losses on

investments of $0.9 million and lower foreign exchange losses on accounts receivable balances.

Income Taxes

Harmonic’s provision for (benefit from) income taxes, and provision for (benefit from) income taxes as a
percentage of net revenue, for each of the three years ended December 31, 2010, 2009, and 2008 are presented in the
table below. Also presented is the related dollar and percentage change in provision for (benefit from) income taxes
as compared with the prior year, for each of the two years ended December 31, 2010 and 2009.

Provision for (benefit from) income taxes . . . . . . . . . . . . . . . . . . . $ 9,774
As a % of net revenue. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase (decrease) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $(4,630)
Percent change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3%

(32.1)% 179.9%

4.5%

(4.9)%

$32,427

Year Ended December 31,
2010
2009
(In thousands, except percentages)
$14,404

2008

$(18,023)

For the year ended December 31, 2010, our effective tax rate on our pre-tax income was 179.7%, compared to an
effective tax rate on our pre-tax loss of 148.0% for 2009. The increase is primarily due to the impact of foreign losses for
which benefit is not taken and non-deductible merger costs. The difference between the underlying effective tax rate for
the year ended December 31, 2010 and the federal statutory rate of 35% is primarily attributable to charges taken due to
unbenefitted foreign losses of certain foreign entities, offset by a tax benefit related to an intercompany sale of acquired
intangibles, non-deductible stock-based compensation expense, non-deductible merger costs, accrued interest for
certain unrecognized tax benefits, and the recording of a valuation allowance against a portion of our California tax
credits. Further, new California tax legislation, enacted in February 2009, provides for the election of a single sales
apportionment formula beginning in 2011. The Company anticipates it will elect the single sales apportionment
method. The use of this apportionment method reduces the amount of expected future California taxable income, which
required the Company to record a valuation allowance against a portion of its California tax credits.

For the year ended December 31, 2009, our effective tax rate was 148.0%, compared to a tax benefit of 39.2%
for 2008. The difference between the underlying effective tax rate for 2009 and the federal statutory rate of 35% is
primarily attributable to unbenefitted foreign losses, non-deductible stock-based compensation expense, accrued
interest for certain unrecognized tax benefits, and the recording of a valuation allowance against a portion of our
California tax credits.

Segments

Harmonic operates as a single operating segment and reports our financial results as a single segment. See

Note 15 of Notes to Consolidated Financial Statements.

Liquidity and Capital Resources

Cash, cash equivalents and short-term investments. . . . . . . . . . . $120,371
Net cash provided by operating activities . . . . . . . . . . . . . . . . . $ 17,837
Net cash used in investing activities . . . . . . . . . . . . . . . . . . . . . $ (96,355)
Net cash provided by financing activities . . . . . . . . . . . . . . . . . $ 22,692

2010

2008

Year Ended December 31,
2009
(In thousands)
$271,070
$ 11,088
$ (42,912)
4,243
$

$327,163
$ 60,127
$ (17,952)
8,463
$

As of December 31, 2010, cash, cash equivalents and short-term investments totaled $120.4 million, compared
to $271.1 million as of December 31, 2009. Cash provided by operations was $17.8 million in 2010, resulting from a
net loss of $4.3 million, adjusted for $43.2 million in non-cash charges, and $21.0 million for use of cash associated
with the net change in assets and liabilities. The non-cash charges included deferred income taxes, amortization of
intangible assets, stock-based compensation, depreciation, accretion of investments and loss on disposal of fixed
assets. The net change in assets and liabilities included increases in accounts receivable, inventories and prepaid
expenses, as well as decreases in accounts payable and accrued excess facilities cost, which was partially offset by
an increase in deferred revenue, income taxes payable and accrued and other liabilities. The increase in accrued and
other liabilities was mostly attributable to higher incentive compensation accruals in 2010, as compared to 2009, as
a result of the increase in revenue in 2010.

We expect that cash provided by operating activities may fluctuate in future periods as a result of a number of
factors, including fluctuations in our operating results, shipment linearity, accounts receivable collections perfor-
mance, inventory and supply chain management, tax benefits from stock-based compensation, and the timing and

amount of compensation and other payments. We usually pay our annual incentive compensation to employees in
the first quarter.

Net cash used in investing activities was $96.4 million in 2010, resulting from the purchase of Omneon in
September 2010 for $153.3 million and capital expenditures of $35.6 million, primarily related to leasehold
improvements to our new corporate headquarters, partially offset by proceeds from the net sale and maturity of
investments of $92.8 million. Harmonic currently expects capital expenditures will be in the range of $15 million to
$20 million during 2011.

Net cash provided by financing activities of $22.7 million in 2010, primarily due to $18.8 million in proceeds
relating to lessor financing of building improvements for our new corporate headquarters and $3.9 million of net
proceeds from the issuance of common stock.

In the event we need or desire to access funds from the other short-term investments that we hold, it is possible
that we may not be able to do so due to adverse market conditions. Our inability to sell all or some of our short-term
investments at par or our cost, or rating downgrades of issuers of these securities, could adversely affect our results
of operations or financial condition. Nevertheless, we believe that our existing liquidity sources will satisfy our
presently contemplated cash requirements for at least the next twelve months. However, if our expectations are
incorrect, we may need to raise additional funds to fund our operations, to take advantage of unanticipated
opportunities or to strengthen our financial position.

In addition, we actively review potential acquisitions that would complement our existing product offerings,
enhance our technical capabilities or expand our marketing and sales presence. Any future transaction of this nature
could require potentially significant amounts of capital or could require us to issue our stock and dilute existing
stockholders. If adequate funds are not available, or are not available on acceptable terms, we may not be able to
take advantage of market opportunities, to develop new products or to otherwise respond to competitive pressures.

Our ability to raise funds may be adversely affected by a number of factors relating to Harmonic, as well as
factors beyond our control, including the global economic slowdown, market uncertainty surrounding the ongoing
U.S. war on terrorism, as well as conditions in financial markets and the cable and satellite industries. There can be
no assurance that any financing will be available on terms acceptable to us, if at all.

OFF-BALANCE SHEET ARRANGEMENTS

None as of December 31, 2010.

CONTRACTUAL OBLIGATIONS AND COMMITMENTS

Future payments under contractual obligations, and other commercial commitments, as of December 31, 2010,

were as follows:

Payments Due by Period

Total
Amounts
Committed

1 Year or
Less

Operating Leases(1) . . . . . . . . . . . . . . . . . . . . .
Inventory Purchase Commitments . . . . . . . . . . .

$59,189
24,327

$ 4,761
24,327

2-3 Years
(In thousands)
$12,071
—

4-5 Years

Over 5
Years

$11,872
—

$30,485
—

Total Contractual Obligations . . . . . . . . . . . . . .

$83,516

$29,088

$12,071

$11,872

$30,485

Other Commercial Commitments:
Standby Letters of Credit . . . . . . . . . . . . . . . . .
Indemnification obligations(2) . . . . . . . . . . . . . .

Total Commercial Commitments . . . . . . . . . . . .

599
—

599

599
—

599

$ —
—

$ —

$ — $ —
—

—

$ — $ —

1. As of December 31, 2010, $4.5 million of these future lease payments were accrued for as part of accrued

excess facility costs. See Note 9 “Restructuring and Excess Facilities.”

2. Harmonic indemnifies its officers and the members of its Board of Directors pursuant to its bylaws and
contractual indemnity agreements. Harmonic also indemnifies some of its suppliers and customers for specified
intellectual property matters and other vendors, such as building contractors, pursuant to certain parameters and
restrictions. The scope of these indemnities varies, but, in some instances, includes indemnification for defense
costs, damages and other expenses (including reasonable attorneys’ fees).

Due to the uncertainty with respect to the timing of future cash flows associated with our unrecognized tax
benefits at December 31, 2010, we are unable to make reasonably reliable estimates of the period of cash settlement
with the respective taxing authority. Therefore, $48.9 million of unrecognized tax benefits classified as “Income
taxes payable, long-term” in the accompanying Consolidated Balance Sheet as of December 31, 2010, have been
excluded from the contractual obligations table above. See Note 14 “Income Taxes” to our Consolidated Financial
Statements for a discussion on income taxes.

NEW ACCOUNTING PRONOUNCEMENTS

See Note 2 of the accompanying Consolidated Financial Statements for a full description of recent accounting
pronouncements, including the respective expected dates of adoption and effects on results of operations and
financial condition.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Market risk represents the risk of loss that may impact the operating results, financial position, or liquidity of
Harmonic due to adverse changes in market prices and rates. Harmonic is exposed to market risk because of changes
in interest rates, foreign currency exchange rates, as measured against the U.S. dollar and currencies of Harmonic’s
subsidiaries, and changes in the value of financial instruments held by Harmonic.

FOREIGN CURRENCY EXCHANGE RISK

Harmonic has a number of international subsidiaries, each of whose sales are generally denominated in
U.S. dollars. In addition, Harmonic has various international branch offices that provide sales support and systems
integration services. Sales denominated in foreign currencies were approximately 6% of net revenue in both 2010
and 2009. Periodically, Harmonic enters into foreign currency forward exchange contracts (“forward exchange
contracts”) to manage exposure related to foreign accounts receivable and reduce the effects of fluctuating exchange
rates on expenses denominated in foreign currencies. Harmonic does not enter into derivative financial instruments
for trading purposes. At December 31, 2010, we had a forward exchange contract to sell Euros totaling $3.3 million
and a forward exchange contract to sell Japanese Yen totaling $0.4 million. These forward exchange contracts
matured in the first quarter of 2011. While Harmonic does not anticipate that near-term changes in exchange rates
will have a material impact on Harmonic’s operating results, financial position and liquidity, Harmonic cannot
assure you that a sudden and significant change in the value of local currencies would not harm Harmonic’s
operating results, financial position and liquidity.

INTEREST RATE AND CREDIT RISK

Exposure to market risk for changes in interest rates relates primarily to Harmonic’s investment portfolio of
marketable debt securities of various issuers, types and maturities and to Harmonic’s borrowings under its bank line
of credit facility. Harmonic does not use derivative instruments in its investment portfolio, and its investment
portfolio only includes highly liquid instruments. These investments are classified as available for sale and are
carried at estimated fair value, with material unrealized gains and losses reported in “accumulated other com-
prehensive income (loss)”. As of December 31, 2010, gross unrealized gains were nominal. If the credit market
deteriorates, we may incur realized losses, which could adversely affect our financial condition or results of
operations. There is risk that losses could be incurred if Harmonic were to sell any of its securities prior to stated
maturity. As of December 31, 2010, our cash, cash equivalents and short-term investments balance was $120.4 mil-
lion. In a declining interest rate environment, as short term investments mature, reinvestment occurs at less
favorable market rates. Given the short term nature of certain investments, declining interest rates would negatively
impact investment income. Based on our estimates, a 100 basis point, or 1%, change in interest rates would have
increased or decreased the fair value of our investments by approximately $0.1 million as of December 31, 2010.

Item 8. Financial Statements and Supplementary Data

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Our management is responsible for establishing and maintaining adequate internal control over financial
reporting as defined in Rule 13a-15(f) and Rule 15d-15(f) of the Exchange Act. Our internal control over financial
reporting is a process 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. Our 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 our assets;

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 our receipts and
expenditures are being made only in accordance with authorizations of our management and directors; and

3. provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition,

use or disposition of our assets that could have a material effect on the financial statements.

The effectiveness of any system of internal control over financial reporting, including ours, is subject to
inherent limitations, including the exercise of judgment in designing, implementing, operating, and evaluating the
controls and procedures, and the inability to eliminate misconduct completely. Accordingly, any system of internal
control over financial reporting, including ours, no matter how well designed and operated, can only provide
reasonable, not absolute, assurances. 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. Our management assessed the effectiveness of
Harmonic’s internal control over financial reporting as of December 31, 2010. In making this assessment, our
management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Com-
mission (COSO) in Internal Control — Integrated Framework. Management has excluded from its assessment of
internal control over financial reporting, as of December 31, 2010, certain elements of the internal control over
financial reporting of Omneon, because we acquired Omneon in a purchase business combination during 2010 and
had not, as of December 31, 2010, fully integrated Omneon’s internal control over financial reporting and related
processes. Subsequent to the acquisition, certain elements of the internal control over financial reporting and related
processes were integrated into our existing systems and internal control over financial reporting. Those controls that
were not integrated have been excluded from management’s assessment of the internal control over financial
reporting as of December 31, 2010. The excluded elements represent controls over accounts constituting approx-
imately 1% of our consolidated assets as of December 31, 2010 and 2% of our net revenue for the year then ended.
Based on our assessment using those criteria, we concluded that, as of December 31, 2010, Harmonic’s internal
control over financial reporting was effective.

Index to Consolidated Financial Statements

Report of Independent Registered Public Accounting Firm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Balance Sheets as of December 31, 2010 and 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Operations for the years ended December 31, 2010, 2009 and 2008 . . . . . . .
Consolidated Statements of Stockholders’ Equity and Comprehensive Income (Loss) for the years ended
December 31, 2010, 2009 and 2008. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Cash Flows for the years ended December 31, 2010, 2009 and 2008 . . . . . .
Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page

61
62
63

64
65
66

Financial Statement Schedules:

1. Financial statement schedules have been omitted because the information is not required to be set forth

herein, is not applicable or is included in the financial statements or notes thereto.

2. Selected Quarterly Financial Data: The following table sets forth, for the periods indicated, selected

quarterly financial data for the Company.

Quarterly Data (Unaudited)

Year Ended December 31, 2010

Year Ended December 31, 2009

Fourth

Third

Second

First
(In thousands)

Fourth

Third

Second

First

Quarterly Data:
Net revenue . . . . . . . . . . . . . . . .
Gross profit . . . . . . . . . . . . . . . .
Income (loss)from operations . . .
Net income (loss) . . . . . . . . . . . .
Net income (loss) per

share — basic . . . . . . . . . . . . .

Net income (loss) per

$138,194 $104,784 $95,544 $84,822 $86,657 $83,861 $81,293 $ 67,756
25,385
(10,790)
(18,843)

36,080 33,547
(4,172)
(7,919)

40,806 39,349
3,499
2,461
47
5,319

47,532 45,682
4,097
1,572
4,445
(361)

61,381
(2,988)
(13,738)

(571)
2,577

(0.12)

(0.00)

0.05

0.06

0.00

0.03

(0.08)

(0.20)

share — diluted. . . . . . . . . . . .

(0.12)

(0.00)

0.05

0.00

0.03

(0.08)

(0.20)

(cid:129) In the fourth quarter of 2010, a charge of $2.1 million was recorded in cost of revenue related to the
amortization of fair value adjustments made to Omneon inventory at the time of merger. In addition, selling,
general and administrative expenses included approximately $3.0 million related to excess facilities costs
associated with the former Omneon office in Sunnyvale, California. $0.9 million related to an anticipated
litigation settlement, $0.5 million in severance related expenses and $0.2 million of acquisition expenses
related to Omneon.

(cid:129) The selling, general and administrative expenses in the third quarter of 2010 included approximately
$3.3 million of acquisition expenses related to Omneon, $0.8 million in severance related expenses and a
benefit of $0.2 million related to the reduction of our excess facilities reserves. In addition, a charge of
$0.4 million was recorded in cost of revenue related to the amortization of fair value adjustments made to
Omneon inventory at the time of merger.

(cid:129) The selling, general and administrative expenses in the second quarter of 2010 included approximately
$2.4 million of acquisition expenses related to Omneon and $0.2 million in severance related expenses.

(cid:129) The selling, general and administrative expenses in the first quarter of fiscal year 2009 included approx-
imately $3.4 million of acquisition expenses related to the acquisition of Scopus in March 2009. In addition,
a charge of $6.3 million was recorded in cost of revenue, primarily consisting of excess and obsolete

inventories expenses from product discontinuances and severance expenses for terminated Scopus employ-
ees. Research and development expenses included $0.6 million of severance expense for terminated Scopus
employees. Selling, general and administrative expenses included $0.5 million of severance for terminated
Scopus employees.

(cid:129) In the second quarter of 2009, the Company recorded an excess facilities expense of $0.3 million related to
the closure of the Scopus New Jersey office. In addition, a charge of $0.5 million was recorded in selling,
general and administrative expenses related to severance expenses for terminated Scopus employees and a
charge totaling $0.5 million was recorded in cost of revenue and operating expenses related to severance
expenses for other terminated employees.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of Harmonic Inc.:

In our opinion, the accompanying Consolidated Balance Sheets and the related Consolidated Statements of
Operations, Consolidated Statements of Stockholders’ Equity and Comprehensive Income (Loss), and Consoli-
dated Statements of Cash Flows listed in the accompanying index present fairly, in all material respects, the
financial position of Harmonic Inc. and its subsidiaries at December 31, 2010 and December 31, 2009, and the
results of their operations and their cash flows for each of the three years in the period ended December 31, 2010 in
conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the
Company maintained, in all material respects, effective internal control over financial reporting as of December 31,
2010, based on criteria established in Internal Control — Integrated Framework issued by the Committee of
Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is responsible for
these financial statements, for maintaining effective internal control over financial reporting and for its assessment
of the effectiveness of internal control over financial reporting, included in Management’s Report on Internal
Control over Financial Reporting appearing under Item 8. Our responsibility is to express opinions on these
financial statements and on the Company’s internal control over financial reporting based on our integrated audits.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board
(United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about
whether the financial statements are free of material misstatement and whether effective internal control over
financial reporting was maintained in all material respects. Our audits of the financial statements included
examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing
the accounting principles used and significant estimates made by management, and evaluating the overall financial
statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of
internal control over financial reporting, assessing the risk that a material weakness exists, and testing and
evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also
included performing such other procedures as we considered necessary in the circumstances. We believe that our
audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles. A company’s internal control over financial reporting
includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail,
accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable
assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance
with generally accepted accounting principles, and that receipts and expenditures of the company are being made
only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable
assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s
assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that
controls may become inadequate because of changes in conditions, or that the degree of compliance with the
policies or procedures may deteriorate.

As described in Management’s Report on Internal Control over Financial Reporting appearing on page 58,
management has excluded from its assessment of internal control over financial reporting as of December 31, 2010
certain elements of the internal control over financial reporting of Omneon, Inc. (“Omneon”), because Omneon was
acquired by the Company in a purchase business combination during 2010. Subsequent to the acquisition, certain
elements of the acquired business’ internal control over financial reporting and related processes were integrated
into the Company’s existing systems and internal control over financial reporting. Those controls that were not
integrated have been excluded from management’s assessment of internal control over financial reporting and from
our audit of the Company’s internal control over financial reporting. The excluded elements represent controls over
accounts of approximately 1% of the Company’s consolidated assets as of December 31, 2010 and 2% of
consolidated revenue for the year then ended.

/s/ PRICEWATERHOUSECOOPERS LLP
PRICEWATERHOUSECOOPERS LLP

San Jose, California
March 1, 2011

HARMONIC INC.

CONSOLIDATED BALANCE SHEETS

December 31,

2010

2009

(In thousands, except per
share amounts)

ASSETS

Current assets:
Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Short-term investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts receivable, net of allowances of $5,897 and $5,163 at December 31, 2010 and 2009,

respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inventories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Property and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intangibles, net
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

96,533
23,838

152,477
118,593

101,652
58,065
39,849
28,614

348,551
39,825
211,878
118,070
2,062

64,838
35,066
26,503
20,821

418,298
25,941
63,953
25,265
22,847

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

720,386

556,304

LIABILITIES AND STOCKHOLDERS’ EQUITY

Current liabilities:
Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income taxes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued excess facility costs, long-term . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income taxes payable, long-term . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financing liability, long-term . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income taxes, long-term . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other non-current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Commitments and contingencies (Notes 16 and 17)
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value, 150,000 shares authorized; 112,360 and 96,110 shares issued and

outstanding at December 31, 2010 and 2009, respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capital in excess of par value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated deficit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26,300
6,791
46,279
51,283

130,653
1,153
48,883
—
14,849
4,645

200,183

22,065
609
32,855
37,584

93,113
58
43,948
6,908
—
4,804

148,831

112
2,397,671
(1,876,868)
(712)

96
2,279,945
(1,872,533)
(35)

Total stockholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

520,203

407,473

Total liabilities and stockholders’ equity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

720,386

556,304

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

HARMONIC INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

Product revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2010

Year Ended December 31,
2009
(In thousands, except per share amounts)
$331,131
$280,009
$370,783
33,832
39,557
52,561

2008

Net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product cost of revenue. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service cost of revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

423,344
210,864
17,079

319,566
170,734
14,472

364,963
174,803
12,627

Total cost of revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

227,943

185,206

187,430

Gross profit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

195,401

134,360

177,533

Operating expenses:
Research and development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selling, general and administrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amortization of intangibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total operating expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income (loss) from operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income, net
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other expense, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income (loss) before income taxes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for (benefit from) income taxes . . . . . . . . . . . . . . . . . . . . . . . .

77,197
108,150
4,912

190,259
5,142
1,082
(785)

5,439
9,774

61,435
81,138
3,822

146,395
(12,035)
3,181
(881)

(9,735)
14,404

54,471
83,118
639

138,228
39,305
9,216
(2,552)

45,969
(18,023)

Net income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ (4,335)

$ (24,139)

$ 63,992

Net income (loss) per share:
Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(0.04)

(0.25)

0.68

0.67

Weighted average shares:
Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

101,487
101,487

95,833
95,833

94,535
95,434

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

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY AND COMPREHENSIVE
INCOME (LOSS)

HARMONIC INC.

Common Stock

Amount

Capital in
Excess of Par
Values

Accumulated
Deficit

Accumulated
Other
Comprehensive
Loss

Stockholders’
Equity

Comprehensive
Income (Loss)

(In thousands)

93,772
—

$ 94
—

$2,246,875
—

$(1,912,386)
63,992

Balance at December 31, 2007 . . . . . . .
Net income . . . . . . . . . . . . . . . . . . .
Unrealized loss on investments, net of

tax . . . . . . . . . . . . . . . . . . . . . . .
Currency translation . . . . . . . . . . . . . .

Comprehensive income . . . . . . . . . . . .

Stock-based compensation . . . . . . . . . .
Issuance of Common Stock under option
and purchase plans . . . . . . . . . . . . .

Balance at December 31, 2008 . . . . . . .
Net loss. . . . . . . . . . . . . . . . . . . . . .
Unrealized gain on investments, net of

tax . . . . . . . . . . . . . . . . . . . . . . .
Currency translation . . . . . . . . . . . . . .

Comprehensive loss . . . . . . . . . . . . . .

Stock-based compensation . . . . . . . . . .
Issuance of Common Stock under

option, stock award and purchase
plans . . . . . . . . . . . . . . . . . . . . . .

Issuance of Common Stock for

acquisition of Rhozet

. . . . . . . . . . .

Balance at December 31, 2009 . . . . . . .
Net loss. . . . . . . . . . . . . . . . . . . . . .
Unrealized loss on investments, net of

tax . . . . . . . . . . . . . . . . . . . . . . .
Currency translation . . . . . . . . . . . . . .

Comprehensive loss . . . . . . . . . . . . . .

Stock-based compensation . . . . . . . . . .
Issuance of Common Stock under

option, stock award and purchase
plans . . . . . . . . . . . . . . . . . . . . . .

—
—

—

1,245

95,017
—

—
—

—

95
—

—
—

892

201

96,110
—

—
—

—

96
—

—
—

7,811

8,550

—
—

—

2,263,236
—

(1,848,394)
(24,139)

—
—

4,242

1,870

—
—

2,279,945
—

(1,872,533)
(4,335)

—

10,597

$ 63,992

(93)
(357)

$ 63,542

$(24,139)

529
56

$(23,554)

$ (4,335)

(376)
(301)

$ (5,012)

$(170)
—

(93)
(357)

$334,413
63,992

(93)
(357)

—

(620)
—

529
56

—

(35)
—

(376)
(301)

—

7,811

8,551

414,317
(24,139)

529
56

10,597

4,243

1,870

407,473
(4,335)

(376)
(301)

15,549

3,859

98,063

271

—
—

—

—
—

—

15,549

Issuance of Common Stock for

acquisition of Omneon . . . . . . . . . .

14,150

Excess tax benefits from stock-based

compensation . . . . . . . . . . . . . . . .

—

2,100

—

3,857

98,049

271

Balance at December 31, 2010 . . . . . . . 112,360

$112

$2,397,671

$(1,876,868)

$(712)

$520,203

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

HARMONIC INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

2010

Year Ended December 31,
2009
(In thousands)

2008

$ (4,335)

$ (24,139)

$ 63,992

Cash flows from operating activities:
Net income (loss). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization of intangibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depreciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stock-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net loss on disposal of fixed assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other non-cash adjustments, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changes in assets and liabilities, net of effect of acquisitions:
Accounts receivable, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inventories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income taxes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued excess facility costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued and other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17,425
9,990
15,539
162
(1,475)
1,529

(19,744)
(11,979)
(5,445)
(3,080)
5,086
11,017
(2,412)
5,559

Net cash provided by operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17,837

Cash flows from investing activities:
Purchases of investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from maturities of investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from sales of investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of property and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of Scopus, net of cash acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of Omneon, net of cash acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of intellectual property . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other acquisitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sale of Entone, Inc. convertible note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(51,457)
80,961
63,269
(35,624)
—
(153,254)
—
(250)
—

11,904
8,655
10,579
198
11,818
2,594

5,426
7,726
(2,313)
5,735
2,072
1,389
(6,044)
(24,512)

11,088

(129,202)
130,641
27,240
(8,086)
(63,053)
—
—
(452)
—

6,275
7,014
7,806
185
(55,859)
1,409

6,529
7,388
3,278
(7,134)
(6,433)
33,657
(4,638)
(3,342)

60,127

(132,813)
117,352
6,885
(8,546)
—
—
(500)
(2,830)
2,500

Net cash used in investing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(96,355)

(42,912)

(17,952)

Cash flows from financing activities:
Proceeds from lease financing liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from issuance of common stock, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net cash provided by financing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18,833
3,859

22,692

Effect of exchange rate changes on cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . .

(118)

—
4,243

4,243

167

—
8,463

8,463

248

Net increase (decrease) in cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(55,944)
152,477

(27,414)
179,891

50,886
129,005

Cash and cash equivalents at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 96,533

$ 152,477

$ 179,891

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supplemental disclosures of cash flow information:
Income tax payments, net
Non-cash investing and financing activities:
Issuance of restricted common stock for Rhozet acquisition . . . . . . . . . . . . . . . . . . . . . . . . . .
Issuance of restricted common stock for Omneon acquisition . . . . . . . . . . . . . . . . . . . . . . . . .
Fair value of vested portion of stock options and restricted stock units assumed in connection with
the Omneon acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financing liability for construction in progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,427

2,391

4,188

—
95,938

2,125
—

1,870
—

—
6,908

—
—

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

HARMONIC INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1: ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT

ACCOUNTING POLICIES

Harmonic Inc. (“Harmonic” or the “Company”) designs, manufactures and sells versatile and high perfor-
mance video infrastructure products and system solutions that enable its customers to efficiently create, prepare and
deliver broadcast and on-demand video services to televisions, personal computers and mobile devices. Histor-
ically, the majority of the Company’s sales have been derived from sales of video processing solutions and network
edge and access systems to cable television operators and from sales of video processing solutions to direct-to-home
satellite operators. More recently, the Company is providing its video processing solutions to telecommunications
companies, or telcos, broadcasters and other media companies that create video programming or offer video
services. In September 2010, Harmonic acquired Omneon, Inc. (“Omneon”), a private, venture-backed company
specializing in file-based infrastructure for the production, preparation and playout of video content typically
deployed by broadcasters, satellite operators, content owners and other media companies. The acquisition of
Omneon is complementary to Harmonic’s core business, expanding Harmonic’s customer reach into content
providers and extending its product lines into video servers and video-optimized storage for content production and
playout.

Basis of Presentation. The accompanying consolidated financial statements of Harmonic include the
accounts of the Company and its subsidiaries. All significant intercompany accounts and transactions have been
eliminated in consolidation. The Company’s fiscal quarters are based on 13-week periods, except for the fourth
quarter which ends on December 31.

Use of Estimates. The preparation of financial statements in conformity with generally accepted accounting
principles in the United States of America requires management to make estimates and assumptions that affect the
reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the
consolidated financial statements and the reported amounts of revenues and expenses during the reporting period.
Actual results could differ from those estimates.

Cash and Cash Equivalents. Cash equivalents are comprised of highly liquid, investment-grade investments
with an original or remaining maturity of three months or less at the date of purchase. Cash equivalents are stated at
amounts that approximate fair value based on quoted market prices.

Investments. Harmonic’s short-term investments are stated at fair value and are principally comprised of
U.S. government, U.S. government agencies, state government agencies and corporate debt securities. The
Company classifies its investments as available-for-sale in accordance with applicable accounting guidance on
accounting for certain investments in debt and equity securities and states its investments at fair value, with
unrealized gains and losses reported in accumulated other comprehensive income (loss). The specific identification
method is used to determine the cost of securities disposed of, with realized gains and losses reflected in other
expense, net. Investments are anticipated to be used for current operations and are, therefore, classified as current
assets even though maturities may extend beyond one year. The Company monitors its investment portfolio for
impairment on a periodic basis. In the event a decline in value is determined to be other than temporary, an
impairment charge is recorded. The Company considers current market conditions, as well as its likeliness or need
to sell its investments prior to a recovery of par value, when determining if a loss is other than temporary.

Fair Value of Financial Instruments. The carrying value of Harmonic’s financial instruments, including cash,
equivalents, short-term investments, accounts receivable, accounts payable and accrued liabilities approximate fair
value due to their short maturities.

Concentrations of Credit Risk/Major Customers/Supplier Concentration. Financial

instruments which
subject Harmonic to concentrations of credit risk consist primarily of cash, cash equivalents, short-term investments
and accounts receivable. Cash, cash equivalents and short-term investments are invested in short-term, highly liquid
investment-grade obligations of commercial or governmental issuers, in accordance with Harmonic’s investment
policy. The investment policy limits the amount of credit exposure to any one financial institution, commercial or
governmental issuer. Harmonic’s accounts receivable are derived from sales to cable, satellite, telcos, broadcasters

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

and other media companies. Harmonic generally does not require collateral from its customers and performs
ongoing credit evaluations of its customers and provides for expected losses. Harmonic maintains an allowance for
doubtful accounts based upon the expected collectability of its accounts receivable. One customer had a balance of
16% of the Company’s net accounts receivable as of December 31, 2010. Two customers had balances of 14% and
12% of the Company’s net accounts receivable as of December 31, 2009.

Certain of the components and subassemblies included in the Company’s products are obtained from a single
source or a limited group of suppliers. Although the Company seeks to reduce dependence on those sole source and
limited source suppliers, the partial or complete loss of certain of these sources could have at least a temporary
adverse effect on the Company’s results of operations and damage customer relationships.

Revenue Recognition. Harmonic’s principal sources of revenue are from hardware products, software
products, solution sales, services, and hardware and software maintenance contracts. Harmonic recognizes revenue
when persuasive evidence of an arrangement exists, delivery has occurred or services have been provided, the sale
price is fixed or determinable, collectability is reasonably assured, and risk of loss and title have transferred to the
customer.

Revenue from product sales, excluding the revenue generated from service-related solutions, which are
discussed below, is recognized when risk of loss and title has transferred, which is generally upon shipment or
delivery, or once all applicable criteria have been met. Allowances are provided for estimated returns and discounts.
Such allowances are adjusted periodically to reflect actual and anticipated experience.

Solution sales for the design, manufacture, test, integration and installation of products to the specifications of
Harmonic’s customers, including equipment acquired from third parties to be integrated with Harmonic’s products,
that are customized to meet the customer’s specifications are accounted for in accordance with applicable
accounting guidance on accounting for performance of construction/production contracts. Accordingly, for each
arrangement that the Company enters into that includes both products and services, the Company performs a
detailed evaluation to determine whether the arrangement should be accounted for as a single arrangement, or
alternatively, for arrangements that do not involve significant production, modification or customization, under
other accounting guidance. The Company has a long-standing history of entering into contractual arrangements to
deliver the solution sales described above and such arrangements represent a significant part of the operations of the
Company.

At the outset of each arrangement accounted for as a single arrangement, the Company develops a detailed
project plan and associated labor hour estimates for each project. The Company believes that, based on its historical
experience, it has the ability to make labor cost estimates that are sufficiently dependable to justify the use of the
percentage-of-completion method of accounting and, accordingly, utilizes percentage-of-completion accounting
for most arrangements that are determined to be single arrangements. Under the percentage-of-completion method,
revenue recognized reflects the portion of the anticipated contract revenue that has been earned, equal to the ratio of
labor hours expended to date to anticipated final labor hours, based on current estimates of labor hours to complete
the project. If the estimated costs to complete a project exceed the total contract amount, indicating a loss, the entire
anticipated loss is recognized.

When arrangements contain multiple elements, Harmonic evaluates all deliverables in the arrangement at the
outset of the arrangement based on applicable accounting guidance on accounting for revenue arrangements with
multiple deliverables. If the undelivered elements qualify as separate units of accounting based on applicable
accounting guidance, which include that the delivered elements have value to the customer on a stand-alone basis
and that objective and reliable evidence of fair value exists for undelivered elements, Harmonic allocates the
arrangement fee based on the relative fair value of the elements of the arrangement. If a delivered element does not
meet the criteria in the applicable accounting guidance to be considered a separate unit of accounting, revenue is
deferred until the undelivered elements are fulfilled. The Company establishes fair value by reference to the price
the customer is required to pay when an item is sold separately, using contractually stated, substantive renewal rates,
where applicable, or the average price of recently completed stand alone sales transactions. Accordingly, the

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

determination as to whether appropriate objective and reliable evidence of fair value exists can impact the timing of
revenue recognition for an arrangement.

For multiple element arrangements that include both hardware products and software products, Harmonic
evaluates the arrangement based on applicable accounting guidance on non-software deliverables in an arrangement
containing more-than-incidental software. In accordance with the applicable accounting guidance, the arrangement
is divided between software-related elements and non-software deliverables. Software-related elements are
accounted for as software and include all non-software deliverables for which a software deliverable is essential
to its functionality. When software arrangements contain multiple elements and vendor specific objective evidence
(VSOE) of fair value exists for all undelivered elements, Harmonic accounts for the delivered elements using the
residual method. In arrangements where VSOE of fair value is not available for all undelivered elements, the
Company defers the recognition of all revenue under an arrangement until all elements, except post contract
support, have been delivered. When post contract support remains the only undelivered element for such contracts,
revenue is then recognized using the residual method. Fair value of software-related elements is based on separate
sales to other customers or upon renewal rates quoted in contracts when the quoted renewal rates are deemed to be
substantive.

Maintenance services are recognized ratably over the maintenance term, which is typically one year. The
unrecognized revenue portion of maintenance agreements billed is recorded as deferred revenue. The costs
associated with services are recognized as incurred.

Deferred revenue includes billings in excess of revenue recognized, net of deferred cost of revenue, and

invoiced amounts remain deferred until applicable revenue recognition criteria are met.

Revenue from distributors and system integrators is recognized on delivery, provided that the criteria for
revenue recognition have been met. The Company’s agreements with these distributors and system integrators have
terms which are generally consistent with the standard terms and conditions for the sale of the Company’s
equipment to end users and do not provide for product rotation or pricing allowances, as are typically found in
agreements with stocking distributors. The Company accrues for sales returns and other allowances based on its
historical experience.

Shipping and Handling Costs. Shipping and handling costs incurred for inventory purchases and product

shipments are recorded in cost of revenue in the Company’s Consolidated Statements of Operations.

Inventories.

Inventories are stated at the lower of cost, using the weighted average method, or market.
Harmonic establishes provisions for excess and obsolete inventories to reduce such inventories to their estimated
net realizable value after evaluation of historical sales, future demand and market conditions, expected product
lifecycles and current inventory levels. Such provisions are charged to cost of revenue in the Company’s
Consolidated Statements of Operations.

Capitalized Software Development Costs. Costs related to research and development are generally charged
to expense as incurred. Capitalization of material software development costs begins when a product’s techno-
logical feasibility has been established in accordance with applicable accounting guidance on accounting for the
costs of computer software to be sold, leased, or otherwise marketed. To date, the time period between achieving
technological feasibility, which the Company has defined as the establishment of a working model, which typically
occurs when beta testing commences, and the general availability of such software, has been short, and, as such,
software development costs qualifying for capitalization have been insignificant.

The Company incurs costs associated with developing software for internal use and for which no plan exists to
market the software externally. If internal software development costs become material, the Company will
capitalize the costs as part of property and equipment and recognize the associated depreciation over a useful
life of generally three years. In the years ended December 31, 2010 and 2009, the Company capitalized $1.0 million
and $1.1 million in internal use software development costs, respectively. In the year ended December 31, 2008, the
internal use software development costs qualifying for capitalization were insignificant.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

Property and Equipment. Property and equipment are recorded at cost. Depreciation and amortization are
computed using the straight-line method over the estimated useful lives of the assets. Estimated useful lives are five
years for furniture and fixtures and up to four years for machinery and equipment. Depreciation and amortization for
leasehold improvements are computed using the shorter of the remaining useful lives of the assets, up to ten years, or
the lease term of the respective assets. Depreciation and amortization expense related to property and equipment for
the years ended December 31, 2010, 2009 and 2008 was $10.0 million, $8.7 million and $7.0 million, respectively.

Goodwill. Goodwill represents the difference between the purchase price and the estimated fair value of the
identifiable assets acquired and liabilities assumed. The Company tests for impairment of goodwill on an annual
basis in the fourth quarter of each of its fiscal years at the Company level, which is the sole reporting unit, and at any
other time at which events occur or circumstances indicate that the carrying amount of goodwill may exceed its fair
value. When assessing the goodwill for impairment, the Company considers its market capitalization adjusted for a
control premium and, if necessary, the Company’s discounted cash flow model, which involves significant
assumptions and estimates, including the Company’s future financial performance, the Company’s weighted
average cost of capital and the Company’s interpretation of currently enacted tax laws. Circumstances that could
indicate impairment and require the Company to perform an impairment test include: a significant decline in the
financial results of the Company’s operations; the Company’s market capitalization relative to net book value;
unanticipated changes in competition and the Company’s market share; significant changes in the Company’s
strategic plans; or adverse actions by regulators. Based on the impairment test performed in the fourth quarter of
2010, the Company does not believe that its goodwill was impaired.

Long-lived Assets. Long-lived assets represent property and equipment and purchased intangible assets.
Purchased intangible assets from business combinations and asset acquisitions include customer base, maintenance
agreements and related relationships, core technology, developed technology, in-process technology, trademarks
and tradenames, supply agreements and assembled workforce. The Company evaluates the recoverability of
intangible assets and other long-lived assets when indicators of impairment are present. When impairment
indicators are present, the Company evaluates the recoverability of intangible assets and other long-lived assets
on the basis of undiscounted cash flows from each asset group. If impairment is indicated, provisions for
impairment are determined based on fair value, principally using discounted cash flows. This evaluation involves
significant assumptions and estimates, including the Company’s future financial performance, the Company’s
weighted average cost of capital and the Company’s interpretation of currently enacted tax laws and accounting
pronouncements. Circumstances that could indicate impairment and require the Company to perform an impair-
ment test include: a significant decline in the cash flows of such asset or asset group; unanticipated changes in
competition and the Company’s market share; significant changes in the Company’s strategic plans; or exiting an
activity resulting from a restructuring of operations. See Note 4, “Goodwill and Identified Intangible Assets” for
additional information.

Restructuring Costs and Accruals for Excess Facilities. The Company applies applicable accounting
guidance on accounting for costs associated with restructuring costs, including exit or disposal activities, which
requires that a liability for costs associated with an exit or disposal activity be recognized and measured initially at
fair value when the liability is incurred. Harmonic’s restructuring activities have primarily been related to excess
facilities. The Company determines the excess facilities accrual based on expected cash payments, under the
applicable facility lease, reduced by any estimated sublease rental income for such facility. See Note 9 “Restruc-
turing and Excess Facilities” for additional information.

Accrued warranties. The Company accrues for estimated warranty costs at the time of revenue recognition
and records such accrued liabilities as part of cost of revenue. Management periodically reviews its warranty
liability and adjusts the accrued liability based on the terms of warranties provided to customers, historical and
anticipated warranty claims experience, and estimates of the timing and cost of specified warranty claims.

Currency Translation. The functional currency of the Company’s Israeli, Cayman and Swiss operations is
the U.S. dollar. All other foreign subsidiaries use the respective local currency as the functional currency. When the
local currency is the functional currency, gains and losses from translation of these foreign currency financial

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

statements into U.S. dollars are recorded as a separate component of other comprehensive income (loss) in
stockholders’ equity. For subsidiaries where the functional currency is the U.S. dollar, gains and losses resulting
from remeasuring foreign currency denominated balances into U.S. dollars are included in other expense, net and
have been insignificant for all periods presented. Foreign currency transaction gains and losses derived from
monetary assets and liabilities being stated in a currency other than the functional currency are recorded to other
expense, net in the Company’s Consolidated Statements of Operations.

Income Taxes.

In preparing the Company’s financial statements, the Company estimates the income taxes for
each of the jurisdictions in which the Company operates. This involves estimating the Company’s actual current tax
exposures and assessing temporary and permanent differences resulting from differing treatment of items, such as
reserves and accruals, for tax and accounting purposes.

The Company’s income tax policy is to record the estimated future tax effects of temporary differences
between the tax bases of assets and liabilities and amounts reported in the Company’s accompanying Consolidated
Balance Sheets, as well as operating loss and tax credit carryforwards. The Company follows the guidelines set forth
in the applicable accounting guidance regarding the recoverability of any tax assets recorded on the Consolidated
Balance Sheet and provides any necessary allowances as required. Determining necessary allowances requires the
Company to make assessments about the timing of future events, including the probability of expected future
taxable income and available tax planning opportunities.

The Company is subject to examination of its income tax returns by various tax authorities on a periodic basis.
The Company regularly assesses the likelihood of adverse outcomes resulting from such examinations to determine
the adequacy of its provision for income taxes. The Company has applied the provisions of the accounting guidance
on accounting for uncertainty in income taxes, which requires application of a more-likely-than-not threshold to the
recognition and de-recognition of uncertain tax positions. If the recognition threshold is met, the applicable
accounting guidance permits the Company to recognize a tax benefit measured at the largest amount of tax benefit
that, in the Company’s judgment, is more than 50 percent likely to be realized upon settlement. It further requires
that a change in judgment related to the expected ultimate resolution of uncertain tax positions be recognized in
earnings in the period of such change.

The Company files annual income tax returns in multiple taxing jurisdictions around the world. A number of
years may elapse before an uncertain tax position is audited and finally resolved. While it is often difficult to predict
the final outcome or the timing of resolution of any particular uncertain tax position, the Company believes that its
reserves for income taxes reflect the most likely outcome. The Company adjusts these reserves and penalties, as
well as the related interest, in light of changing facts and circumstances. Changes in the Company’s assessment of
its uncertain tax positions or settlement of any particular position could materially and adversely impact the
Company’s income tax rate, operating results, financial position and cash flows.

Advertising Expenses. Harmonic expenses the cost of advertising as incurred. During the years ended

December 31, 2010, 2009, and 2008, advertising expenses were not material to the results of operations.

Stock-based Compensation Expense. Harmonic measures and recognizes compensation expense for all
share-based payment awards made to employees and directors, including stock options, restricted stock units and
awards related to our Employee Stock Purchase Plan (“ESPP”), based upon the grant-date fair value of those
awards.

Stock-based compensation expense recognized for the years ended December 31, 2010, 2009 and 2008 was

$15.5 million, $10.6 million and $7.8 million, respectively.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

affected by the Company’s stock price, as well as the assumptions regarding a number of highly complex and
subjective variables. These variables include, but are not limited to, the Company’s expected stock price volatility
over the term of the awards, and actual and projected employee stock option exercise behaviors. The fair value of
each restricted stock unit grant is based on the underlying value of the Company’s common stock on the date of
grant.

Comprehensive Income (Loss). Comprehensive income (loss) includes net income (loss) and other com-
prehensive income (loss). Other comprehensive income (loss) includes cumulative translation adjustments and
unrealized gains and losses on available-for-sale securities.

Total comprehensive income (loss) for the years ended December 31, 2010, 2009 and 2008 are presented in the
accompanying Consolidated Statements of Stockholders’ Equity and Comprehensive Income (Loss). Total accu-
mulated other comprehensive income (loss) is displayed as a separate component of stockholders’ equity in the
accompanying Consolidated Balance Sheets. The accumulated balances for each component of other compre-
hensive income (loss) consist of the following, net of taxes:

Unrealized Gain
(Loss) on
Available-for-Sale
Securities

Balance at January 1, 2008 . . . . . . . . . . . . .
Change during year . . . . . . . . . . . . . . . . . . .

Balance at December 31, 2008. . . . . . . . . . .
Change during year . . . . . . . . . . . . . . . . . . .

Balance at December 31, 2009. . . . . . . . . . .
Change during year . . . . . . . . . . . . . . . . . . .

$ (41)
(93)

(134)
529

395
(376)

Balance at December 31, 2010. . . . . . . . . . .

$ 19

Foreign Currency
Translation
(In thousands)
$(129)
(357)

(486)
56

(430)
(301)

$(731)

Accumulated Other
Comprehensive
Income (Loss)

$(170)
(450)

(620)
585

(35)
(677)

$(712)

Accounting for Derivatives and Hedging Activities. Harmonic accounts for derivative financial instruments
and hedging contracts in accordance with the applicable accounting guidance, which requires that all derivatives be
recognized at fair value in the statement of financial position and that the corresponding gains or losses be reported
either in the statement of operations or as a component of comprehensive income (loss), depending on the type of
hedging relationship that exists.

Forward Exchange Contracts Not Designated as Hedging Instruments. Periodically, Harmonic enters into
foreign currency forward exchange contracts (“forward exchange contracts”) to manage exposure related to
accounts receivable denominated in foreign currencies. The Company does not enter into derivative financial
instruments for trading purposes. The Company does not designate these forward exchange contracts as hedging
instruments, and these contracts do not qualify for hedge accounting treatment. At December 31, 2010, the
Company had a forward exchange contract to sell Euros with a notional value of $3.3 million and Japanese Yen with
a notional value of $0.4 million. These foreign exchange contracts mature in the first quarter of 2011. At
December 31, 2009, the Company had a forward exchange contract to sell Euros with a notional value of
$6.6 million. This foreign exchange contract matured in the first quarter of 2010. The fair value of these forward
exchange contracts was not material as of December 31, 2010 and 2009.

The Company’s Euro forward exchange contracts generally have maturities of one month and are closed out
and rolled over into new contracts at the end of each monthly reporting period. The Company’s Japanese Yen
forward exchange contracts have maturities of two to three months and are closed out at maturity. The fair value of
these contracts has historically not been significant at the end of each reporting period. Typically, realized gains and
losses on these forward exchange contracts, which arise as a result of closing out the contracts, are substantially
offset by remeasurement or realized losses and gains on the underlying balances denominated in non-functional

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

currencies. Gains and losses on forward exchange contracts and from remeasurement and realized gains and losses
of the underlying asset balances, denominated in non-functional currencies, are recognized in the Consolidated
Statements of Operations in other expense, net.

Foreign Exchange Contracts Designated as Cash Flow Hedges. Additionally, the Company has expenses
denominated in Israeli Shekels (ILS) and, from time to time, addresses a portion of the related foreign currency
exposure through use of derivative financial instruments. The ILS expenses are hedged using forward exchange
contracts. The Company enters into forward exchange contracts primarily to reduce the effects of fluctuating ILS
exchange rates against the U.S. dollar. The forward exchange contracts range from one to six months in maturity.

The hedges of ILS-denominated forecasted expenses are accounted for in accordance with applicable guidance
on derivatives and hedging, pursuant to which the Company has designated its hedges of forecasted foreign
currency expenses as cash flow hedges. For derivative instruments that are designated and qualify as cash flow
hedges under this guidance, the Company formally documents, for each derivative contract at the hedge’s inception,
the relationship between the hedging instrument (forward contract) and hedged item (forecasted ILS expenses), the
nature of the risk being hedged, and its risk management objective and strategy for undertaking the hedge. The
Company records the effective portion of the gain or loss on the derivative instrument in accumulated other
comprehensive income (loss) and reclassifies these amounts into the related functional expense in the period during
which the hedged transaction is recognized in earnings. There were no forward exchange contracts to buy ILS
outstanding as of December 31, 2010. As of December 31, 2009, the Company had outstanding foreign exchange
forward contracts to buy ILS with a notional value of $1.2 million that were entered into in order to hedge forecasted
expenses. As of December 31, 2009, the net unrealized gains on derivative instruments were not material.

Reclassifications. From time to time the Company reclassifies certain prior period balances to conform to the
current year presentation. These reclassifications have no material impact on previously reported total assets, total
liabilities, stockholders’ equity, results of operations or cash flows.

NOTE 2: RECENT ACCOUNTING PRONOUNCEMENTS

In October 2009, the Financial Accounting Standards Board (“FASB”) issued revised guidance for revenue
recognition with multiple deliverables. This guidance impacts the determination of when the individual deliverables
included in a multiple-element arrangement may be treated as separate units of accounting. Additionally, this
guidance modifies the manner in which the transaction consideration is allocated across the separately identified
deliverables by no longer permitting the residual method of allocating arrangement consideration. This revised
guidance is effective beginning in the first quarter of fiscal year 2011. The Company is currently evaluating the
potential impact, if any, of the adoption of the revised accounting guidance on its consolidated results of operations,
financial condition and cash flows.

In October 2009, the FASB issued revised guidance for the accounting for certain revenue arrangements that
include software elements. This guidance amends the scope of pre-existing software revenue guidance by removing
from the guidance non-software components of tangible products and certain software components of tangible
products. This revised guidance is effective beginning in the first quarter of fiscal year 2011. The Company is
currently evaluating the potential impact, if any, of the adoption of the revised accounting guidance on its
consolidated results of operations, financial condition and cash flows.

In January 2010, the FASB issued updated guidance related to fair value measurements and disclosures, which
requires a reporting entity to disclose separately the amounts of significant transfers in and out of Level 1 and
Level 2 fair value measurements and to describe the reasons for the transfers. In addition, in the reconciliation for
fair value measurements using significant unobservable inputs, or Level 3, a reporting entity should disclose
separately information about purchases, sales, issuances and settlements (that is, on a gross basis rather than one net
number). The updated guidance also requires that an entity provide fair value measurement disclosures for each
class of assets and liabilities and disclosures about the valuation techniques and inputs used to measure fair value for
both recurring and non-recurring fair value measurements for Level 2 and Level 3 fair value measurements. The
updated guidance is effective for interim or annual financial reporting periods beginning after December 15, 2009,

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

except for the disclosures about purchases, sales, issuances and settlements in the roll forward activity in Level 3 fair
value measurements, which are effective for fiscal years beginning after December 15, 2010 and for interim periods
within those fiscal years. The adoption of the interim reporting requirements by the Company in the first quarter of
2010 did not have a material impact on its consolidated results of operations or financial condition. The Company
does not believe the adoption of the interim reporting requirements in the first quarter of 2011 will have a material
impact on its consolidated results of operations or financial condition.

NOTE 3: ACQUISITIONS

Omneon

On September 15, 2010, Harmonic completed the acquisition of 100% of the equity interests of Omneon, Inc.,
a private, venture-backed company organized under the laws of Delaware and headquartered in Sunnyvale,
California. Omneon is engaged in the development and support of a range of video servers, active storage systems
and related software applications that media companies use to simultaneously ingest, process, store, manage and
deliver digital media in a wide range of formats. When used for television production and on-air operations, the
products are designed to provide continuous real-time record and playback capabilities as well as file-based access
to and delivery of digital media content. Omneon’s products include Spectrum and MediaDeck video servers,
MediaGrid active storage systems and media management software applications which were initially designed for,
and have been deployed mostly by, broadcasters that use Omneon’s products for the production and transmission of
television content.

The acquisition of Omneon is intended to strengthen Harmonic’s competitive position in the digital media
market and to broaden the Company’s relationships with customers who produce and distribute digital video
content, such as broadcasters, content networks and other major owners of content. The acquisition is also intended
to broaden Harmonic’s technology and product lines with digital storage and playout solutions which complement
Harmonic’s existing video processing products. In addition, the acquisition provided an assembled workforce, the
implicit value of future cost savings as a result of combining entities, and is expected to provide Harmonic with
future unidentified new products and technologies. These opportunities were significant factors to the establishment
of the purchase price, which exceeded the fair value of Omneon’s net tangible and intangible assets acquired
resulting in goodwill of approximately $147.2 million that was recorded in connection with this acquisition.

The purchase price, net of $40.5 million of cash acquired, was $251.3 million, which consisted of (i) approx-
imately $153.3 million in cash, net of cash acquired, (ii) 14.2 million shares of Harmonic common stock with a total
fair value of approximately $95.9 million based on the price of Harmonic common stock at the time of close, and
(iii) approximately $2.1 million representing the fair value attributed to shares of Omneon equity awards which
Harmonic assumed for which services had already been rendered as of the close of the acquisition. The cash portion
of the purchase price was paid from existing cash balances. The Company also incurred a total of $5.9 million of
transaction expenses, which were expensed as selling, general and administrative expenses in the year ended
December 31, 2010.

The assets and liabilities of Omneon were recorded at fair value at the date of acquisition. The Company will
continue to evaluate certain assets and liabilities as new information is obtained about facts and circumstances that
existed as of the acquisition date that, if known, would have resulted in the recognition of those assets and liabilities
as of that date. Changes to the assets and liabilities recorded may result in a corresponding adjustment to goodwill
and the measurement period shall not exceed one year from the acquisition date. Further, any associated
restructuring activities will be expensed in future periods and not recorded through purchase accounting as
previously done under prior accounting guidance. There are no contingent consideration arrangements in con-
nection with the acquisition.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The results of operations of Omneon are included in Harmonic’s Consolidated Statements of Operations from
September 15, 2010, the date of acquisition. The following table summarizes the allocation of the purchase price
based on the fair value of the assets acquired and the liabilities assumed at the date of acquisition:

Cash acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts receivable (Gross amount due from accounts receivable of $17,760) . . . . . . . . .
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fixed assets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other tangible assets acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intangible assets:

(In thousands)

$ 40,485
17,055
11,010
12,391
17,960
2,828

Existing technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50,800
9,000
In-process technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Patents/core technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9,800
Customer contracts and related relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,200
4,000
Trade names/trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5,500
Maintenance agreements and related relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . .
800
Order backlog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total assets acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income tax liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net assets acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less: cash acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

109,100
147,208

358,037
(6,829)
(6,399)
(41,804)
(11,203)

291,802
(40,485)

Net purchase price. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$251,317

The purchase price set forth in the table above was allocated based on the fair value of the tangible and
intangible assets acquired and liabilities assumed as of September 15, 2010. The Company used an overall discount
rate of 15% to estimate the fair value of the intangible assets acquired, which was derived based on financial metrics
of comparable companies operating in Omneon’s industry. In determining the appropriate discount rates to use in
valuing each of the individual intangible assets, the Company adjusted the overall discount rate giving consideration
to the specific risk factors of each asset. The following methods were used to value the identified intangible assets:

(cid:129) The fair value of the existing technology assets acquired was established based on their highest and best use
by a market participant using the “Income Approach.” The Income Approach included an analysis of the
markets, cash flows and risks associated with achieving such cash flows to calculate the fair value;

(cid:129) As of the acquisition date, Omneon was developing new versions and incremental improvements to its 3G
MediaPort product, which is expected to be used in the Spectrum product line once completed. The in-
process project was at a stage of development that required further research and development to determine
technical feasibility and commercial viability. The fair value of the in-process technology assets acquired
was based on the valuation premise that the assets would be “In-Use” using a discounted cash flow model;

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

(cid:129) The fair value of patents/core technology assets acquired was established based on a variation of the Income
Approach called the “Profit Allocation Method”. In the Profit Allocation Method, the Company estimated
the value of the patents/core technology based on the profits expected to be saved because Harmonic owns
the technology;

(cid:129) The fair value of the customer contracts and related relationships assets acquired was based on the Income

Approach;

(cid:129) The fair value of trade names/trademarks assets acquired was established based on the Profit Allocation

Method;

(cid:129) The fair value of the maintenance agreements and related relationships assets acquired was based on the

Income Approach; and

(cid:129) The fair value of backlog acquired was established based on the Income Approach.

Identified intangible assets are being amortized over the following useful lives:

(cid:129) Existing technology is estimated to have a useful life of four years;

(cid:129) In-process technology will be amortized upon completion over its projected remaining useful life as assessed
on the completion date. The completion of the in-process project is expected within the first half of 2011;

(cid:129) Patents/core technology are being amortized over their estimated useful life of four years;

(cid:129) Customer contracts and related relationships are being amortized over their estimated useful life of six years;

(cid:129) Trade name/trademarks are being amortized over their estimated useful lives of four years;

(cid:129) Maintenance agreements and related relationships are being amortized over their estimated useful life of six

years; and

(cid:129) Order backlog was amortized over its estimated useful life of three and one half months.

The existing technology, patents/core technology, customer contracts and related relationships, maintenance
agreements and related relationships, trade name/trademarks and backlog are being amortized using the straight-
line method which reflects the future projected cash flows.

The residual purchase price of $147.2 million has been recorded as goodwill. The goodwill resulting from this

acquisition is not deductible for federal tax purposes.

Substantially all unvested stock options and unvested restricted stock units issued by Omneon and outstanding
at closing were assumed by Harmonic. The exchange of stock-based compensation awards was treated as a
modification under current accounting guidance. The calculation of the fair value of the exchanged awards
immediately before and after the modification did not result in any significant incremental fair value. The fair value
of the Harmonic stock options and restricted stock units issued to Omneon employees was $17.3 million, which was
determined using the Black-Scholes option pricing model, of which $2.1 million represents purchase consideration
and $15.2 million will be recorded as compensation expense over the weighted average service period of 2.5 years.

For the period from September 15, 2010 to December 31, 2010, Omneon products contributed revenues of

$36.5 million and a net operating profit of $1.1 million.

Scopus

On March 12, 2009, Harmonic completed the acquisition of 100% of the equity interests of Scopus Video
Networks Ltd., or Scopus, a publicly traded company based in Israel. Scopus was engaged in the development and
support of digital video networking products that allowed network operators to transmit, process, and manage
digital video content. Scopus’ primary products included integrated receivers/decoders (“IRD”), intelligent video
gateways (“IVG”), and encoders. In addition, Scopus marketed multiplexers, network management systems
(“NMS”), and other ancillary technology to its customers.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The acquisition of Scopus strengthened Harmonic’s technology and market leadership, particularly in the
broadcast contribution and distribution markets. The acquisition extended Harmonic’s diversification strategy,
providing it with an expanded international sales force and global customer base, particularly in video broadcast,
contribution and distribution markets, as well as complementary video processing technology and expanded
research and development capability. In addition, the acquisition provided an assembled workforce, the implicit
value of future cost savings as a result of combining entities, and is expected to provide Harmonic with future
unidentified new products and technologies. These opportunities were significant factors to the establishment of the
purchase price, which exceeded the fair value of Scopus’ net tangible and intangible assets acquired resulting in
goodwill of approximately $22.8 million that was recorded in connection with this acquisition.

The purchase price, net of $23.3 million of cash acquired, was $63.1 million, which was paid from existing
cash balances. The Company also incurred a total of $3.4 million of transaction expenses, which were expensed as
selling, general and administrative expenses in the first quarter of 2009.

The assets and liabilities of Scopus were recorded at fair value at the date of acquisition. Subsequent to the
acquisition, the Company recorded expenses of $8.2 million in the year ended December 31, 2009, primarily for
excess and obsolete inventories related to product discontinuances and severance costs.

The results of operations of Scopus are included in Harmonic’s Consolidated Statements of Operations from
March 12, 2009, the date of acquisition. The following table summarizes the allocation of the purchase price based
on the fair value of the assets acquired and the liabilities assumed at the date of acquisition:

(In thousands)

Cash acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts receivable (Gross amount due from accounts receivable of $6,977) . . . . . . . . .
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fixed assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other tangible assets acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Existing technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $10,100
2,400
In-process technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3,500
Patents/core technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4,000
Customer contracts and related relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2,100
Trademarks and tradenames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1,000
Maintenance agreements and related relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2,000
Order backlog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total assets acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net assets acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less: cash acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 23,316
1,899
6,308
15,899
4,280
2,312

25,100
22,847

101,961
(2,963)
(336)
(12,293)

86,369
(23,316)

Net purchase price . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 63,053

The purchase price set forth in the table above was based on the fair value of the tangible and intangible assets
acquired and liabilities assumed as of March 12, 2009. The Company used an overall discount rate of 16% to

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

estimate the fair value of the intangible assets acquired, which was derived based on financial metrics of comparable
companies operating in Scopus’ industry. In determining the appropriate discount rates to use in valuing each of the
individual intangible assets, the Company adjusted the overall discount rate giving consideration to the specific risk
factors of each asset. The following methods were used to value the identified intangible assets:

(cid:129) The fair value of the existing technology assets acquired was established based on their highest and best used
by a market participant using the “Income Approach.” The Income Approach included an analysis of the
markets, cash flows and risks associated with achieving such cash flows to calculate the fair value. As of the
acquisition date, Scopus was developing new versions and incremental improvements to its IRD, encoder
and IVG products;

(cid:129) The in-process projects were at a stage of development that required further research and development to
determine technical feasibility and commercial viability. The fair value of the in-process technology assets
acquired was based on the valuation premise that the assets would be “In-Use” using a discounted cash flow
model;

(cid:129) The fair value of the customer contracts and related relationships assets acquired was based on the Income

Approach;

(cid:129) The fair value of trade names/trademarks assets acquired was established based on the Profit Allocation

Method;

(cid:129) The fair value of the maintenance agreements and related relationships assets acquired was based on the

Income Approach; and

(cid:129) The fair value of backlog acquired was established based on the “Cost Savings Approach.”

Identified intangible assets are being amortized over the following useful lives:

(cid:129) Existing technology is estimated to have a useful life between three years and five years;

(cid:129) In-process technology is being amortized upon completion over its projected remaining useful life as
assessed on the completion date. Three of the in-process projects were completed in the fourth quarter of
2009 and the remaining three projects were completed in the first quarter of 2010. The completed technology
is estimated to have useful lives between three and six years;

(cid:129) Patents/core technology are being amortized over their useful life of four years;

(cid:129) Customer contracts and related relationships are being amortized over their useful life of between four years

and five years;

(cid:129) Trade name/trademarks are being amortized over their estimated useful lives of five years;

(cid:129) Maintenance agreements and related relationships are being amortized over their useful life of four

years; and

(cid:129) Order backlog was amortized over its estimated useful life of six months.

The existing technology, patents/core technology, customer contracts, maintenance agreements and related
relationships, trade name/trademarks and backlog are being amortized using the straight-line method which reflects
the future projected cash flows.

The residual purchase price of $22.8 million has been recorded as goodwill. The goodwill as a result of this

acquisition is not deductible for federal tax purposes.

For the period from March 12, 2009 to December 31, 2009, Scopus products contributed revenues of

$19.3 million and a net operating loss of $22.5 million.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

In July 2007, Harmonic completed its acquisition of Rhozet Corporation. The purchase price was approx-
imately $15.5 million, including approximately $2.8 million of cash, which was paid in the first quarter of 2008
approximately $2.3 million of the total merger consideration, consisting of cash and shares of Harmonic common
stock, was held back by Harmonic for at least 18 months following the closing of the acquisition to satisfy certain
indemnification obligations of Rhozet’s shareholders pursuant to the terms of the purchase agreement. All holdback
amounts were released during 2009.

In December 2006, Harmonic completed its acquisition of Entone Technologies, Inc. for a total purchase
consideration of $48.9 million. Under the terms of the purchase agreement, Entone spun off its consumer premises
equipment, or CPE, business into a separate private company prior to the closing of the merger. As part of the terms
of the purchase agreement, Harmonic purchased a convertible note with a face amount of $2.5 million in the new
spun off private company in July 2007. The convertible note was sold to a third party for approximately $2.6 million
during 2008.

Pro Forma Financial Information

The unaudited pro forma financial information presented below for the year ended December 31, 2008
summarizes the combined results of operations as if the Scopus acquisition had been completed on January 1, 2008.
The unaudited pro forma financial information for the year ended December 31, 2008 combines the results for
Harmonic for the year ended December 31, 2008 and the historical results of Scopus for the year ended
December 31, 2008.

The unaudited pro forma financial information presented below for the year ended December 31, 2009
summarizes the combined results of operations as if the Scopus and Omneon acquisitions had been completed on
January 1, 2009. The unaudited pro forma financial information for the year ended December 31, 2009 combines
the results for Harmonic for the year ended December 31, 2009, the historical results of Omneon for the year ended
December 31, 2009 and the historical results of Scopus through March 12, 2009, the date of acquisition.

The unaudited pro forma financial information presented below for the year ended December 31, 2010
summarizes the combined results of operations as if the Omneon acquisition had been completed on January 1,
2010. The unaudited pro forma financial information for the year ended December 31, 2010 combines the results for
Harmonic for the year ended December 31, 2010 and the historical results of Omneon through September 15, 2010,
the date of acquisition.

The pro forma financial information is presented for informational purposes only and does not purport to be
indicative of what would have occurred had the merger actually been completed on such dates or of results which
may occur in the future.

Net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $506,904
(17,619)
Net income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(0.16)
Net income (loss) per share — basic . . . . . . . . . . . . . . . . . . . . .
(0.16)
Net income (loss) per share — diluted. . . . . . . . . . . . . . . . . . . .

2008

2010

Year Ended December 31,
2009
(In thousands, except per share amounts)
$439,345
$428,885
44,654
(37,253)
0.47
(0.34)
0.47
(0.34)

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

NOTE 4: GOODWILL AND IDENTIFIED INTANGIBLE ASSETS

The following is a summary of goodwill and identified intangible assets as of December 31, 2010 and 2009:

December 31, 2010

December 31, 2009

Gross
Carrying
Amount

Accumulated
Amortization

Net
Carrying
Amount

Gross
Carrying
Amount

(In thousands)

Accumulated
Amortization

Net
Carrying
Amount

$127,146
9,000

$ (60,453)
—

$ 66,693
9,000

$ 64,864
600

$(48,013)
—

$16,851
600

67,098
11,361
3,414

(36,117)
(6,060)
(3,414)

30,981
5,301
—

37,900
7,369
3,427

(33,541)
(5,136)
(3,427)

4,359
2,233
—

7,100

(1,008)

6,092

1,600

(405)

1,195

309
2,800

(306)
(2,800)

3
—

309
2,000

(282)
(2,000)

27
—

Identified intangibles:
Existing and core technology . . .
In-process technology . . . . . . . .
Customer contracts and related

relationships . . . . . . . . . . . . .
Trademarks and tradenames . . . .
Supply agreements . . . . . . . . . .
Maintenance agreements and

related relationships . . . . . . . .

Software license, intellectual
property and assembled
workforce . . . . . . . . . . . . . . .
Order backlog . . . . . . . . . . . . . .

Subtotal of identified

intangibles. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .

Goodwill

228,228
211,878

(110,158)
—

118,070
211,878

118,069
63,953

(92,804)
—

25,265
63,953

Total goodwill and other

intangibles. . . . . . . . . . . . . . .

$440,106

$(110,158)

$329,948

$182,022

$(92,804)

$89,218

The changes in the carrying amount of goodwill for the years ended December 31, 2010 and 2009 are as

follows:

Year Ended
December 31,

2010

2009

(In thousands)

Balance at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 63,953
Acquisition of Scopus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment to deferred tax liability associated with the acquisition of

$41,674
— 22,061

Scopus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of Omneon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign currency translation adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

786
147,208
(69)

—
—
218

Balance at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $211,878

$63,953

Historically, there have been no impairment charges recorded to goodwill.

For the years ended December 31, 2010, 2009 and 2008, the Company recorded a total of $17.4 million,
$11.9 million and $6.3 million of amortization expense for identified intangibles, respectively, of which

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

$12.5 million, $8.0 million and $5.5 million, was included in cost of revenue, respectively. The estimated future
amortization expense of purchased intangible assets with definite lives is as follows:

Year Ending December 31,

Cost of Revenue

2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$21,596
20,504
19,232
13,745
620
—

Operating Expenses
(In thousands)
$ 8,907
8,715
8,096
6,775
5,783
4,097

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$75,697

$42,373

Total

$ 30,503
29,219
27,328
20,520
6,403
4,097

$118,070

NOTE 5: FAIR VALUE

The applicable accounting guidance establishes a framework for measuring fair value and expands required
disclosure about the fair value measurements of assets and liabilities. This guidance requires the Company to
classify and disclose assets and liabilities measured at fair value on a recurring basis, as well as fair value
measurements of assets and liabilities measured on a nonrecurring basis in periods subsequent to initial measure-
ment, in a three-tier fair value hierarchy as described below.

The guidance defines fair value as the exchange price that would be received for an asset or paid to transfer a
liability in the principal or most advantageous market for the asset or liability in an orderly transaction between
market participants on the measurement date.

Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the
use of unobservable inputs. The guidance describes three levels of inputs that may be used to measure fair value:

(cid:129) Level 1 — Observable inputs that reflect quoted prices for identical assets or liabilities in active markets.

(cid:129) Level 2 — Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities;
quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by
observable market data for substantially the full term of the assets or liabilities. The Company primarily uses
broker quotes for valuation of its short-term investments.

(cid:129) Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to

the fair value of the assets or liabilities.

The Company uses the market approach to measure fair value for its financial assets and liabilities. The market
approach uses prices and other relevant information generated by market transactions involving identical or
comparable assets or liabilities. During the years ended December 31, 2010 and 2009, there were no nonrecurring
fair value measurements of assets and liabilities subsequent to initial recognition.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The following table sets forth the fair value of the Company’s financial assets measured at fair value on a

recurring basis at December 31, 2010 and 2009 based on the three-tier fair value hierarchy:

Level 1

Level 2

Level 3

Total

(In thousands)

DECEMBER 31, 2010
Money market funds . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate bonds . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State, municipal and local government agencies

bonds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 68,081
—

—
11,907

—

11,931

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 68,081

$ 23,838

DECEMBER 31, 2009
Money market funds . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate bonds . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U.S. federal government bonds . . . . . . . . . . . . . . . . .
State, municipal and local government agencies

bonds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other debt securities . . . . . . . . . . . . . . . . . . . . . . . . .

$114,898
—
—

—
35,707
46,536

—
—

30,381
5,969

$—
—

—

$—

$—
—
—

—
—

$ 68,081
11,907

11,931

$ 91,919

$114,898
35,707
46,536

30,381
5,969

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$114,898

$118,593

$—

$233,491

At December 31, 2010 and 2009, maturities of short-term investments are as follows:

Year Ended
December 31,

2010

2009

(In thousands)

Short-term investments:
Less than one year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $21,174
2,664
Due in 1 - 2 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
—
Due in 3 - 30 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 84,771
27,821
6,001

Total short-term investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $23,838

$118,593

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The following is a summary of available-for-sale securities at December 31, 2010 and 2009:

December 31, 2010
Corporate bonds . . . . . . . . . . . . . . . . . . . . . . . . . .
State, municipal and local government agencies

Amortized
Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Estimated
Fair
Value

(In thousands)

$ 11,894

$ 20

$ (7)

$ 11,907

bonds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11,915

(4)

11,931

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 23,809

$ 40

$(11)

$ 23,838

December 31, 2009
Corporate bonds . . . . . . . . . . . . . . . . . . . . . . . . . .
U.S. federal, state, municipal and local government
agencies bonds . . . . . . . . . . . . . . . . . . . . . . . . .
Other debt securities . . . . . . . . . . . . . . . . . . . . . . .

$ 35,655

$ 74

$(22)

$ 35,707

76,712
5,744

214
234

(9)
(9)

76,917
5,969

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$118,111

$522

$(40)

$118,593

In the event the Company needs or desires to access funds from the short-term investments that it holds, it is
possible that the Company may not be able to do so due to market conditions. If a buyer is found but is unwilling to
purchase the investments at par or the Company’s cost, it may incur a loss. Further, rating downgrades of the
security issuer or the third parties insuring such investments may require the Company to adjust the carrying value
of these investments through an impairment charge. The Company’s inability to sell all or some of the Company’s
short-term investments at par or the Company’s cost, or rating downgrades of issuers of these securities, could
adversely affect the Company’s results of operations or financial condition.

For the years ended December 31, 2010, 2009 and 2008, realized gains and realized losses from the sale of

investments were not material.

Impairment of Investments

Harmonic monitors its investment portfolio for impairment on a periodic basis. In the event that the carrying
value of an investment exceeds its fair value and the decline in value is determined to be other-than-temporary, an
impairment charge is recorded and a new cost basis for the investment is established. In order to determine whether
a decline in value is other-than-temporary, the Company evaluates, among other factors: the duration and extent to
which the fair value has been less than the carrying value; the Company’s financial condition and business outlook,
including key operational and cash flow metrics, current market conditions and future trends in the industry; and the
Company’s relative competitive position within the industry. At the present time, the Company does not intend to
sell its investments that have unrealized losses in accumulated other comprehensive loss. In addition, the Company
does not believe that it is more likely than not that it will be required to sell its investments that have unrealized
losses in accumulated other comprehensive loss before the Company recovers the principal amounts invested. The
Company believes that the unrealized losses are temporary and do not require an other-than-temporary impairment,
based on our evaluation of available evidence as of December 31, 2010.

As of December 31, 2010, there were no individual available-for-sale securities in a material unrealized loss

position and the amount of unrealized losses on the total investment balance was insignificant.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

NOTE 6: ACCOUNTS RECEIVABLE AND ALLOWANCES FOR DOUBTFUL ACCOUNTS,

RETURNS AND DISCOUNTS

December 31,

2010

2009

(In thousands)

Accounts receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $107,549
5,897
Less: allowance for doubtful accounts, returns and discounts . . . . . . . . . . . . .

$70,001
5,163

$101,652

$64,838

Trade accounts receivable are recorded at invoiced amounts and do not bear interest. Harmonic generally does
not require collateral and performs ongoing credit evaluations of its customers and provides for expected losses.
Harmonic maintains an allowance for doubtful accounts based upon the expected collectability of its accounts
receivable. The expectation of collectability is based on the Company’s review of credit profiles of customers’,
contractual terms and conditions, current economic trends and historical payment experience.

The following is a summary of activity in allowances for doubtful accounts, returns and discounts for the years

ended December 31, 2010, 2009 and 2008:

Year Ended December 31,

Balance at
Beginning of
Period

Charges to
Revenue

2010 . . . . . . . . . . . . . . . . . . . . . . . .
2009 . . . . . . . . . . . . . . . . . . . . . . . .
2008 . . . . . . . . . . . . . . . . . . . . . . . .

$5,163
8,697
8,194

$3,109
4,794
7,615

Charges to
Expense
(In thousands)
$1,056
266
1,497

Deductions
From
Reserves

Balance at
End of
Period

$(3,431)
(8,594)
(8,609)

$5,897
5,163
8,697

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

NOTE 7: BALANCE SHEET

Year Ended December 31,

2010

2009

(In thousands)

Inventories:
Raw materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 10,378
2,324
Work-in-process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
45,363
Finished goods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8,633
3,072
23,361

$ 58,065

$ 35,066

Property and equipment:
Building (see Note 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Furniture and fixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Machinery and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leasehold improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

— $

9,110
90,649
5,625

7,063
6,423
70,983
28,645

Less: accumulated depreciation and amortization . . . . . . . . . . . . . . . . . . . . .

105,384
(65,559)

113,114
(87,173)

$ 39,825

$ 25,941

Accrued liabilities:
Accrued compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Accrued excess facilities costs — current . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued incentive compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9,848
1,767
4,811
11,512
23,345

9,790
5,274
4,186
3,539
14,795

$ 51,283

$ 37,584

NOTE 8: FINANCING LIABILITY FOR CONSTRUCTION IN PROGRESS

The lease for the buildings at the Company’s Sunnyvale location ended in September 2010. In December 2009,
the Company entered into a lease for a building in San Jose, California, which was intended to become the
Company’s new headquarters. In January 2010, the Company began a build-out of this facility and during the
construction incurred approximately $18.9 million in structural leasehold improvements. Under the terms of the
lease, the landlord reimbursed $18.8 million of the construction costs. Because certain improvements constructed
by the Company were considered structural in nature and the Company was responsible for any cost overruns, the
Company was considered to be the owner of the construction project for accounting purposes under applicable
accounting guidance on the effect of lessee involvement in asset construction.

As a result, in December 2009 the Company capitalized the fair value of the building of $6.9 million with a
corresponding credit to financing liability. The fair value was determined as of December 31, 2009 using a
combination of the revenue comparison approach and the income capitalization approach. During the year ended
December 31, 2010, the liability increased by $18.9 million due to additional structural leasehold improvements, by
$0.2 million due to land lease expense and by $0.2 million due to capitalized interest expense.

Construction was completed in September 2010 at which time the Company relocated to the new building.
Upon completion of construction in September 2010, the Company assessed and concluded that it qualified for sale-
leaseback accounting under applicable accounting guidance since the Company has no form of continuing

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

involvement other than the leaseback. In connection with the sale-leaseback of the building the Company removed
from its books the carrying value of the building, the structural leasehold improvements and the financing liability.

NOTE 9: RESTRUCTURING AND EXCESS FACILITIES

The Company has recorded restructuring and excess facilities charges beginning in 2001 and throughout
subsequent years as a result of changing conditions in the use of its facilities in the United States and the United
Kingdom. The initial expenses that had been recorded to selling, general and administrative expense and the related
liabilities have been adjusted periodically for changes in sublease income estimates.

In 2008, the Company recorded charges in selling, general and administrative expenses for excess facilities of
$1.2 million from a revised estimate of expected sublease income of a Sunnyvale building and $0.2 million from a
revised estimate of expected sublease income of two buildings in the United Kingdom. The Sunnyvale lease
terminated in September 2010 and the United Kingdom lease terminated in October 2010.

In the first quarter of 2009, the Company recorded a total of $7.4 million of expenses related to activities
resulting from the Scopus acquisition, including the termination of approximately 65 Scopus employees. A charge
of $6.3 million was recorded in cost of revenue, consisting of excess and obsolete inventories expenses from product
discontinuances and severance expenses for terminated Scopus employees. Research and development expenses
were $0.6 million for terminated Scopus employees. Selling, general and administrative expenses totaled $0.5 mil-
lion consisting primarily of severance expenses for terminated Scopus employees. Substantially all of the severance
was paid during the first quarter of 2009.

In the second quarter of 2009, the Company recorded an excess facilities expense of $0.3 million related to the
closure of the Scopus New Jersey office. In addition, a charge of $0.5 million was recorded in selling, general and
administrative expenses related to severance expenses for terminated Scopus employees and a charge totaling
$0.5 million was recorded in cost of revenue and operating expenses related to severance expenses for other
terminated employees. Substantially all of the severance was paid during the year ended December 31, 2009.

In the fourth quarter of 2010, the Company recorded an excess facilities charge of $3.0 million in selling,
general and administrative expenses related to the closure of the Omneon headquarters in Sunnyvale, California.
The charge is based on future rent payments, net of expected sublease income, to be made through the end of the
lease term in June 2013.

Harmonic reassesses this liability quarterly and adjusts as necessary based on changes in the timing and

amounts of expected sublease rental income.

The following table summarizes the activities in the restructuring accrual during the years ended December 31,

2010, 2009 and 2008:

Excess
Facilities

Campus
Consolidation

BTL
Closure
(In thousands)

Scopus
Facilities

Total

Balance at December 31, 2007 . . . . . . . . . $11,150
—
Provisions . . . . . . . . . . . . . . . . . . . . . . . .
(3,954)
Cash payments, net of sublease income . . .

Balance at December 31, 2008 . . . . . . . . .
Provisions . . . . . . . . . . . . . . . . . . . . . . . .
Cash payments, net of sublease income . . .

Balance at December 31, 2009 . . . . . . . . .
Provisions (Recoveries) . . . . . . . . . . . . . .
Cash payments, net of sublease income . . .

7,196
—
(4,079)

3,117
3,061
(3,316)

$ 4,493
1,544
(2,177)

3,860
101
(2,246)

1,715
(2)
(1,713)

$ 370
294
(344)

320
42
(86)

276
(71)
(205)

$ — $16,013
1,838
(6,475)

—
—

—
352
(128)

224
3
(169)

11,376
495
(6,539)

5,332
2,991
(5,403)

Balance at December 31, 2010 . . . . . . . . . $ 2,862

$ —

$ 58

$ 2,920

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

At December 31, 2010, accrued excess facilities totaled $2.9 million, net of estimated expected sublease
income, of which $1.8 million was included in current accrued liabilities and $1.1 million was included in other
non-current liabilities. These amounts are expected to be substantially paid by June 2013. At December 31, 2009,
accrued excess facilities totaled $5.3 million, net of estimated sublease income, of which $5.2 million was included
in current accrued liabilities and $0.1 million was included in other non-current liabilities.

NOTE 10: NET INCOME (LOSS) PER SHARE

Basic net income (loss) per share is computed by dividing the net income (loss) attributable to common
stockholders for the period by the weighted average number of the common shares outstanding during the period. In
the years ended December 31, 2010, 2009 and 2008, there were 18,774,438, 13,280,168 and 9,366,359 of
potentially dilutive shares, consisting of options, restricted stock units and employee stock purchase plan awards
excluded from the net income (loss) per share computations, respectively, because their effect was antidilutive.

Following is a reconciliation of the numerators and denominators of the basic and diluted net income (loss) per

share computations:

Net income (loss) (numerator) . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shares calculation (denominator):
Weighted average shares outstanding — basic . . . . . . . . . . . . . . .
Effect of Dilutive Securities:
Potential common stock relating to stock options, restricted stock
units and ESPP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Future issued common stock related to acquisitions . . . . . . . . . . .

Year Ended December 31,
2010
2009
(In thousands, except per share
amounts)
$(24,139)

2008

$63,992

$ (4,335)

101,487

95,833

94,535

—
—

698
201

Weighted averages shares outstanding — diluted . . . . . . . . . . . . .

101,487

95,833

95,434

Net income (loss) per share — basic . . . . . . . . . . . . . . . . . . . . . .

Net income (loss) per share — diluted . . . . . . . . . . . . . . . . . . . . .

(0.04)

$ (0.25)

$ 0.68

(0.04)

$ (0.25)

$ 0.67

The diluted net loss per share is the same as basic net loss per share for the years ended December 31, 2010 and

2009 because potential common shares are only considered when their effect would be dilutive.

NOTE 11: CREDIT FACILITIES

Harmonic has a bank line of credit facility with Silicon Valley Bank which provides for borrowings of up to
$10.0 million that matures on March 2, 2011. At December 31, 2010, other than standby letters of credit and
guarantees (Note 16), there were no amounts outstanding under the line of credit facility and there were no
borrowings in the years ended December 31, 2010 or 2009. This facility, which was amended and restated in March
2010, contains a financial covenant with the requirement for Harmonic to maintain unrestricted cash, cash
equivalents and short-term investments, net of credit extensions, of not less than $35.0 million. Additionally,
Harmonic’s line of credit includes covenants prohibiting the payment of cash dividends. If Harmonic were unable to
maintain this cash, cash equivalents and short-term investments balance, or if the Company were to pay cash
dividends, Harmonic would not be in compliance with the facility. In the event of noncompliance by Harmonic with
the covenants under the facility, Silicon Valley Bank would be entitled to exercise its remedies under the facility
which include declaring all obligations immediately due and payable. At December 31, 2010, Harmonic was in
compliance with the covenants under this line of credit facility. Future borrowings pursuant to the line would bear
interest at the bank’s prime rate (4.0% at December 31, 2010). Borrowings are payable monthly and are not
collateralized.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

NOTE 12: CAPITAL STOCK

Preferred Stock. Harmonic has 5,000,000 authorized shares of preferred stock. On July 23, 2002, the
Company classified 100,000 of these shares as Series A Participating Preferred Stock in connection with the
Board’s same day approval and adoption of a stockholder rights plan. Under the plan, Harmonic declared and paid a
dividend of one preferred share purchase right for each share of Harmonic common stock held by the Company’s
stockholders of record as of the close of business on August 7, 2002. Each preferred share purchase right entitles the
holder to purchase from the Company one one-thousandth of a share of Series A Participating Preferred Stock, par
value $0.001 per share, at a price of $25.00, subject to adjustment. The rights are not immediately exercisable,
however, and will become exercisable only upon the occurrence of certain events. The stockholder rights plan may
have the effect of deterring or delaying a change in control of Harmonic.

Stock Issuances. During the year ended December 31, 2010, the Company issued 14,150,122 shares of
common stock as part of the consideration for the purchase of all of the outstanding shares of Omneon. The shares
had a fair market value of $95.9 million at the time of issuance.

During the year ended December 31, 2007 Harmonic issued 905,624 shares of common stock as part of the
consideration for the purchase of all the outstanding shares of Rhozet. The shares had a fair market value of
$8.4 million at the time of issuance. The Company had reserved 200,854 shares of Harmonic common stock for
future issuance in connection with the acquisition of Rhozet in July 2007. The shares of Harmonic common stock,
were being held back by Harmonic for at least 18 months following the closing of the acquisition to satisfy certain
indemnification obligations of Rhozet’s shareholders. These shares were issued in the first quarter of 2009.

NOTE 13: BENEFIT PLANS

Stock Plans. Harmonic has reserved an aggregate of 22,828,000 shares of Common Stock for issuance under
various employee stock option plans. Stock options are granted for periods not exceeding ten years and generally
vest 25% at one year from date of grant, and an additional 1/48 per month thereafter. Beginning on February 27,
2006, option grants had a term of seven years. Restricted stock units have no exercise price and generally vest over
four years with 25% vesting at one year from date of grant or the vesting commencement date chosen for the award,
and either an additional 1/16 per quarter thereafter, or 1/8 semiannually thereafter. In May 2010, Harmonic
stockholders approved amendments to the 1995 Stock Plan (the “1995 Plan”) and increased the maximum number
of shares of common stock authorized for issuance by an additional 10,600,000 shares, decreased the maximum
term of stock options to seven years and changed the share counting provisions to provide that each award with an
exercise price below 100% of the fair market value on the grant date (or no exercise price) would decrease the 1995
Plan reserve 1.5 shares for every unit or share granted and any forfeitures of these awards due to their not vesting
would increase the 1995 Plan reserve by 1.5 shares for every unit or share forfeited. Previously, restricted stock units
granted reduced the number of shares reserved for grant under the plans by two shares for every unit granted. Stock
options are granted having exercise prices equal to the fair market value of the stock at the date of grant. Certain
awards provide for accelerated vesting if there is a change in control. In the years ended December 31, 2010 and
2009, employees received restricted stock units valued at $18.1 million and $9.7 million, respectively.

Upon acquisition of Omneon in September 2010, the Company assumed substantially all unvested stock
options and restricted stock units outstanding as of the date of closing from Omneon’s 1998 Stock Option Plan and
2008 Equity Incentive Plan, resulting in the assumption of stock options to purchase approximately 1,522,000 shares
of Harmonic common stock and the assumption of restricted stock units for 1,455,000 shares of Harmonic common
stock. The exchange of stock-based compensation awards was treated as a modification under current accounting
guidance. The calculation of the fair value of the exchanged awards immediately before and after the modification
did not result in any significant incremental fair value. The fair value of Harmonic’s stock options and restricted
stock units issued to Omneon employees was $17.3 million, which was determined using the Black-Scholes option
pricing model, of which $2.1 million represents purchase consideration and $15.2 million will be recorded as
compensation expense over the weighted average service period of 2.5 years.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

Director Option Plans.

In May 2002, Harmonic’s stockholders approved the 2002 Director Option Plan (the
“Plan”), replacing the 1995 Director Option Plan. In June 2006, Harmonic’s stockholders approved an amendment
to the Plan and increased the maximum number of shares of common stock authorized for issuance over the term of
the Plan by an additional 300,000 shares to 700,000 shares and reduced the term of future options granted under the
Plan to seven years. In May 2008, Harmonic stockholders approved amendments to the Plan to, among other things,
increase the maximum number of shares of common stock authorized for issuance by an additional 100,000 to
800,000 shares, and to rename the Plan the “2002 Director Stock Plan.” In May 2010, Harmonic stockholders
approved amendments to the Plan and increased the maximum number of shares of common stock authorized for
issuance by an additional 400,000 shares and changed the share counting provisions to provide that each award of
restricted stock units would decrease the 2002 Plan reserve 1.5 shares for every unit granted and any forfeitures of
unvested restricted stock units would increase the 2002 Plan reserve by 1.5 shares for every unit forfeited. Harmonic
had a total of 752,000 shares of Common Stock reserved for issuance under the Plan as of December 31, 2010. The
Plan provides for the grant of non-statutory stock options or restricted stock units to certain non-employee directors
of Harmonic. Restricted stock units, or RSUs, have no exercise price and vest either after one year or the vesting
date chosen for such award. Previously, restricted stock units granted reduced the number of shares reserved for
grant under the Plan by two shares for every unit granted. Stock options are granted at fair market value of the stock
at the date of grant for periods not exceeding seven years. Initial option grants generally vest monthly over three
years, and subsequent grants generally vest monthly over one year. In the years ended December 31, 2010 and 2009,
there were 87,367 and 99,463 units granted to non-employee directors with a grant date fair value of $0.5 million
and $0.5 million, respectively.

A summary of share-based award activity is as follows:

Balance at December 31, 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shares authorized. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Balance at December 31, 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Balance at December 31, 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shares authorized. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shares
Available
for Grant
(In thousands)
2,051
7,600
(3,013)
(144)
818

7,312
(825)
(3,335)
688
60
154

4,054
11,000
(977)
(4,921)
683
413
197

Balance at December 31, 2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10,449

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The following table summarizes restricted stock unit activity under the Plans:

Balance at December 31, 2007 . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units granted. . . . . . . . . . . . . . . . . . . . . . . . . .

Balance at December 31, 2008 . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units granted. . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units released . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units cancelled . . . . . . . . . . . . . . . . . . . . . . . .

Balance at December 31, 2009 . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding restricted stock units assumed in acquisition of

Omneon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units granted. . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units released . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted stock units cancelled . . . . . . . . . . . . . . . . . . . . . . . .

RSU’S
Outstanding

Weighted
Average
Fair Value
Per Share
(In thousands, except per share data)
$ —
$ —
7.79
72

Aggregate
Fair
Value(1)

72
1,667
(72)
(30)

1,637

1,455
2,821
(1,176)
(230)

7.79
5.84
7.79
6.05

5.88

6.78
6.43
5.86
6.07

$ 371

$7,545

Balance at December 31, 2010 . . . . . . . . . . . . . . . . . . . . . . . . .

4,507

$6.49

1. Represents the fair value of Harmonic common stock on the date that the restricted stock units vested.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The following table summarizes stock option activity under the Plans:

Weighted
Average
Stock
Exercise
Options
Price per
Outstanding
Option
(In thousands, except per
share data)

Balance at December 31, 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Balance at December 31, 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Balance at December 31, 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding options assumed in acquisition of Omneon . . . . . . . . . . . . . . . .
Options granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9,469
3,013
(777)
(818)
(89)

10,798
825
(115)
(688)
(321)

10,499
1,522
977
(400)
(858)
(720)

$11.31
8.16
6.14
13.45
28.98

10.50
5.70
4.80
10.20
35.44

9.44
2.25
6.28
4.60
7.54
33.78

Balance at December 31, 2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11,020

$ 6.90

Options vested and exercisable at December 31, 2010 . . . . . . . . . . . . . . . . .

7,827

Options vested and expected-to-vest at December 31, 2010. . . . . . . . . . . . . .

10,896

The weighted-average fair value of options granted for the years ended December 31, 2010, 2009 and 2008 was

$3.09, $2.88 and $3.79 per share, respectively.

The following table summarizes information regarding stock options outstanding at December 31, 2010:

Range of Exercise Prices
$0.19 — 4.41 . . . . . . . . . . . .
$4.45 — 5.86 . . . . . . . . . . . .
$5.87 — 6.76 . . . . . . . . . . . .
$6.91 — 7.63 . . . . . . . . . . . .
$7.67 — 8.17 . . . . . . . . . . . .
$8.20 — 8.59 . . . . . . . . . . . .
$8.65 — 16.73 . . . . . . . . . . .

Number
Outstanding at
December 31,
2010

1,679
1,585
1,642
168
2,337
1,583
2,026

11,020

Weighted
Average
Remaining
Contractual Life
(In Years)
(In thousands, except per option data)

Weighted
Average
Exercise
Price per
Option

Number
Exercisable at
December 31,
2010

$2.42
5.63
6.17
7.40
8.16
8.23
9.65

$6.90

731
1,044
919
103
1,612
1,441
1,977

7,827

6.6
4.4
4.0
4.3
4.2
3.3
1.7

4.0

Weighted
Average
Exercise
Price per
Option

$2.64
5.62
5.97
7.38
8.16
8.23
9.65

$7.43

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The weighted-average remaining contractual life for all exercisable stock options at December 31, 2010 was
3.1 years. The weighted-average remaining contractual life of all vested and expected-to-vest stock options at
December 31, 2010 was 3.9 years. The weighted-average remaining contractual life of all vested and expect-
ed-to-vest restricted stock units at December 31, 2010 was 1.4 years.

Aggregate intrinsic value of options exercisable at December 31, 2010 was $11.1 million. The aggregate
intrinsic value of stock options vested and expected-to-vest net of estimated forfeitures was $20.2 million at
December 31, 2010. Aggregate intrinsic value represents the difference between our closing price on the last trading
day of the fiscal period, which was $8.57 as of December 31, 2010, and the exercise price multiplied by the number
of options outstanding or exercisable. The intrinsic value of exercised stock options is calculated based on the
difference between the exercise price and the current market value at the time of exercise. The aggregate intrinsic
value of exercised stock options was $1.0 million, $0.2 million and $2.3 million during the years ended
December 31, 2010, 2009 and 2008, respectively.

The total realized tax benefit attributable to stock options exercised during the period in jurisdictions where
this expense is deductible for tax purposes was $0.3 million in the year ended December 31, 2010. There was no
such realized tax benefit in the years ended December 31, 2009 or 2008.

Employee Stock Purchase Plan.

In May 2002, Harmonic’s stockholders approved the 2002 Employee Stock
Purchase Plan (the “2002 Purchase Plan”) replacing the 1995 Employee Stock Purchase Plan effective for the
offering period beginning on July 1, 2002. As a result of the adoption of the 2002 Purchase Plan and subsequent
stockholder-approved amendments, a total of 7.5 million shares have been approved for issuance pursuant to the
2002 Purchase Plan. In addition, in June 2006, the Company’s stockholders approved an amendment to the 2002
Purchase Plan to reduce the term of future offering periods to six months which became effective for the offering
period beginning January 1, 2007. The 2002 Purchase Plan enables employees to purchase shares at 85% of the fair
market value of the Common Stock at the beginning or end of the offering period, whichever is lower. Offering
periods generally begin on the first trading day on or after January 1 and July 1 of each year. The 2002 Purchase Plan
is intended to qualify as an “employee stock purchase plan” under Section 423 of the Internal Revenue Code.
During the years ended December 31, 2010, 2009 and 2008, the number of shares of stock issued under the purchase
plans was 864,800, 705,206 and 468,545 at weighted average prices of $4.90, $5.24 and $7.88, respectively. The
weighted-average fair value of each right to purchase shares of common stock granted under the purchase plans
during the years ended December 31, 2010, 2009 and 2008 was $1.70, $2.19 and $2.86, respectively. At
December 31, 2010, a total of 1,775,073 shares were reserved for future issuances under the 2002 Purchase Plan.

Retirement/Savings Plan. Harmonic has a retirement/savings plan which qualifies as a thrift plan under
Section 401(k) of the Internal Revenue Code. This plan allows participants to contribute up to 20% of total
compensation, subject to applicable Internal Revenue Service limitations. Harmonic can make discretionary
contributions to the plan of 25% of the first 4% contributed by eligible participants up to a maximum contribution
per participant of $1,000 per year. Employer contributions totaled $0.3 million in the year ended December 31,
2008. The employer contribution was suspended during the first quarter of 2009.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

Stock-based Compensation

The following table summarizes stock-based compensation costs in our Consolidated Statements of Oper-

ations for the years ended December 31, 2010, 2009 and 2008:

2010

Year Ended December 31,
2009
(In thousands)

2008

Employee stock-based compensation in:
Cost of revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 2,197

$ 1,517

$1,137

Research and development expense . . . . . . . . . . . . . . . . . . . . . . . . .
Selling, general and administrative expense . . . . . . . . . . . . . . . . . . .

5,013
8,329

Total employee stock-based compensation in operating expense . . . .

13,342

Total employee stock-based compensation . . . . . . . . . . . . . . . . . . . .
Amount capitalized in inventory. . . . . . . . . . . . . . . . . . . . . . . . . . . .

15,539
10

3,846
5,215

9,061

10,578
19

2,845
3,824

6,669

7,806
5

Total stock-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$15,549

$10,597

$7,811

As of December 31, 2010, total unamortized stock-based compensation cost related to unvested stock options
and restricted stock units was $35.7 million. This amount will be recognized as expense using the straight-line
attribution method over the remaining weighted-average amortization period of 2.5 years.

The fair value of each option grant is estimated on the date of grant using the Black-Scholes single option

pricing model with the following weighted average assumptions:

Employee Stock Options
2010
2007
2009

Employee Stock Purchase Plan
2010
2008
2009

Expected life (in years). . . . . . . . . . . . . . . . . . . . . . . . 4.75
Volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . . . .
Dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

56%
2.4%
0.0%

4.75

0.5

51% 46%
60%
1.7% 3.1% 0.4%
0.0% 0.0% 0.0%

0.5
76%
0.5%
0.0%

0.5
46%
2.3%
0.0%

The expected term for stock options and the 2002 Purchase Plan represents the weighted-average period that
the stock options are expected to remain outstanding. Our computation of expected life was determined based on
historical experience of similar awards, giving consideration to the contractual terms of the stock-based awards,
vesting schedules and expectations of future employee behavior.

We use the Company’s historical volatility for a period equivalent to the expected term of the options and the

2002 Purchase Plan offering period to estimate the expected volatility.

The risk-free interest rate assumption is based upon observed interest rates appropriate for the expected term of
our employee stock options and employee stock purchase plan awards. The dividend yield assumption is based on
our history and expectation of dividend payouts.

NOTE 14:

INCOME TAXES

Income (loss) before provision for (benefit from) income taxes consists of the following:

United States. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 66,036
(60,597)

2010

Year Ended December 31,
2009
(In thousands)
$ 9,749
(19,484)

$130,806
(84,837)

2008

$ 5,439

$ (9,735)

$ 45,969

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The provision for (benefit from) income taxes consists of the following:

2010

Year Ended December 31,
2009
(In thousands)

2008

Current:
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 9,760
International . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
755
Deferred:
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

499
(1,240)

$ 2,107
471

$ 37,483
353

11,261
565

(54,993)
(866)

$ 9,774

$14,404

$(18,023)

Harmonic’s provision for (benefit from) income taxes differed from the amount computed by applying the

statutory U.S. federal income tax rate to the income (loss) before income taxes as follows:

2010

Year Ended December 31,
2009
(In thousands)

2008

Provision for (benefit from) income taxes at U.S. Federal statutory

rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,904
(469)
(1,842)
6,880
(450)
1,261
1,940
(1,404)
1,289
665

State taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential in rates on foreign earnings . . . . . . . . . . . . . . . . . . . . .
Losses for which no benefit is taken . . . . . . . . . . . . . . . . . . . . . . .
Change in valuation allowance . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in liabilities for uncertain tax positions . . . . . . . . . . . . . . .
Non-deductible stock-based compensation . . . . . . . . . . . . . . . . . . .
Research credits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-deductible acquisition related expenses . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ (3,407)
(1,661)
(1,768)
8,980
8,150
2,390
1,811
(1,163)
—
1,072

$ 16,089
2,168
(1,859)
(15,306)
(53,450)
32,646
1,170
—
—
519

$ 9,774

$14,404

$(18,023)

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

Deferred tax assets (liabilities) comprise the following:

2010

Year Ended December 31,
2009
(In thousands)

2008

Deferred tax assets:
Reserves and accruals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 33,741
27,431
Net operating loss carryovers . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(3,320)
Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . .
12,136
Research and development credit carryovers. . . . . . . . . . . . . . . . .
6,063
Deferred stock-based compensation . . . . . . . . . . . . . . . . . . . . . . .
2,813
Other tax credits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(1,066)
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 19,876
21,925
7,440
14,930
4,703
3,883
292

$29,395
5,317
8,189
12,775
3,309
4,658
2.384

Total deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valuation allowance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

77,798
(26,557)

73,049
(18,025)

66,027
(1,904)

Net deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred tax liabilities:
Intangibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51,241

55,024

64,123

(26,172)

(7,331)

(4,604)

Net deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 25,069

$ 47,693

$59,519

The following table summarizes the activity related to the Company’s valuation allowance:

Year Ended December 31,

2010

2009

2008

Balance at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . .
Additions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deductions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$18,025
8,532
—

(In thousands)
$ 1,904
16,121

$ 112,330
—
— (110,426)

Balance at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$26,557

$18,025

1,904

The following table summarizes the activity related to the Company’s gross unrecognized tax benefits:

Balance at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increases related to tax positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expiration of the statute of limitations for the assessment of taxes and

Year Ended December 31,
2010
2008
2009
(In millions)
$46.5
1.7

$47.0
7.8

$12.1
34.9

release of other tax contingencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(6.4)

(1.2)

(0.5)

Balance at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$48.4

$47.0

$46.5

The total amount of unrecognized tax benefits that would impact the effective tax rate is approximately
$48.4 million at December 31, 2010. We also accrued potential interest of $1.9 million, related to these
unrecognized tax benefits during 2010, and in total, as of December 31, 2010, the Company had recorded
liabilities for potential penalties and interest of $0.7 million and $4.3 million, respectively. In 2010, the Company
reversed $2.3 million of liability due to the expiration of the statute of limitations. During the years ended
December 31, 2008 and 2009, we accrued potential interest of $0.8 million and $1.6 million, with no potential
penalties in either year, and reversed $0.5 million and $1.2 million of liabilities due to the expiration of the statute of

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

limitations, respectively. The Company anticipates a decrease of $3.4 million in unrecognized tax benefits due to
expiration of the statute of limitations within the next 12 months.

The Company files U.S., state, and foreign income tax returns in jurisdictions with varying statutes of
limitations during which such tax returns may be audited and adjusted by the relevant tax authorities. The 2007
through 2010 tax years generally remain subject to examination by federal and most state tax authorities. In
significant foreign jurisdictions, the 2004 through 2010 tax years generally remain subject to examination by their
respective tax authorities. The Company has been notified that the U.S. Internal Revenue Service will be auditing
the 2008 and 2009 tax years.

The Company anticipates the unrecognized tax benefits may increase during the year for items that arise in the
ordinary course of business. Such amounts will be reflected as an increase in the amount of unrecognized tax
benefits and an increase to the current period tax expense. These increases will be considered in the determination of
the Company’s annual effective tax rate. The amount of the unrecognized tax benefit classified as a long-term tax
payable and partially offset against deferred tax assets, if recognized, would reduce the annual income provision.

Pursuant to applicable accounting guidance on accounting for income taxes, the Company is required to
periodically review the Company’s deferred tax assets and determine whether, based on available evidence, a
valuation allowance is necessary. In 2008, the Company released $110.4 million of the valuation allowance against
all of the Company’s U.S. and certain foreign net deferred tax assets, of which $3.3 million was accounted for as a
reduction to goodwill related to the Entone acquisition. The Company evaluated the need for a valuation allowance
based on historical evidence, trends in profitability, expectations of future taxable income and implemented tax
planning strategies. As such, the Company determined that a valuation allowance was no longer necessary because,
based on the available evidence, the Company concluded that realization of these net deferred tax assets was more
likely than not. In the event that, in the future, the Company determines that a valuation allowance is necessary with
respect to the Company’s U.S. and certain foreign deferred tax assets, the Company would incur a charge equal to
the amount of the valuation allowance in the period in which the Company made such determination, and this could
have a material and adverse impact on the Company’s results of operations for such period. As of December 31,
2010, the Company had a valuation allowance of $26.6 million, which primarily relates to foreign net operating
losses, and a portion of the California tax credits. More specifically, new California tax legislation enacted on
February 20, 2009 provides for the election of a single sales apportionment formula beginning in 2011. The
Company anticipates it will elect the single sales apportionment method. The use of this apportionment method
reduces the amount of expected future state taxable income which required the Company to record a valuation
allowance against a portion of its California tax credits.

As of December 31, 2010, the Company had $72.1 million of state net operating loss carryforwards available to
reduce future taxable income which will begin to expire in 2016 for state tax purposes. As of December 31, 2010 the
Company had foreign net operating loss carryforwards of $109.0 million which do not expire. As of December 31,
2010, the portion of state net operating loss carryforwards which relates to stock option deductions is approximately
$9.0 million. The Company is tracking the portion of the Company’s deferred tax assets attributable to stock option
benefits in a separate memo account pursuant to applicable accounting guidance. Therefore, these amounts are no
longer included in the Company’s gross or net deferred tax assets. Pursuant to applicable accounting guidance, the
stock option benefits will only be recorded to equity when they reduce cash taxes payable.

As of December 31, 2010, the Company had federal and state tax credits carryovers of approximately
$1.6 million and $19.2 million, respectively, available to offset future taxable income. The federal credits expire
beginning in 2029, while the state credits will not expire.

Utilization of the Company’s net operating loss and tax credits may be subject to substantial annual limitation
due to the ownership change limitations provided by the Internal Revenue Code and similar state provisions. Such
an annual limitation could result in the expiration of the net operating loss before utilization.

U.S. income taxes were not provided on approximately $7.8 million of undistributed earnings for certain
non-U.S. subsidiaries. Determination of the amount of unrecognized deferred tax liability for temporary differences

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

related to investments in these non-U.S. subsidiaries that are essentially permanent in duration is not practicable.
The Company has not provided U.S. income taxes and foreign withholding taxes on the undistributed earnings of
foreign subsidiaries as of December 31, 2010 because the Company intends to permanently reinvest such earnings
outside the U.S. If these foreign earnings were to be repatriated in the future, the related U.S. tax liability may be
reduced by any foreign income taxes previously paid on these earnings.

NOTE 15: SEGMENT INFORMATION

The Company operates its business in one reportable segment, which is the design, manufacture and sale of
video infrastructure solutions, spanning content production to multi-screen video delivery. Harmonic’s products
enable customers to create, prepare and deliver video services over broadcast, cable, Internet, mobile, satellite and
networks. Operating segments are defined as components of an enterprise that engage in business activities for
which separate financial information is available and evaluated by the chief operating decision maker in deciding
how to allocate resources and assessing performance. Our chief operating decision maker is our Chief Executive
Officer. The acquisition of Omneon resulted in an additional product line, production and playout, but did not
impact our reportable segments.

The Company’s revenue by product type is summarized as follows:

Video processing products . . . . . . . . . . . . . . . . . . . . . . . . . . . . $202,898
32,579
Production and playout products . . . . . . . . . . . . . . . . . . . . . . . .
135,306
Edge and access products . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
52,561
Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2010

2008

Year Ended December 31,
2009
(In thousands)
$162,654
—
117,355
39,557

$165,885
—
165,246
33,832

Our revenue by geographic region, based on the location at which each sale originates, and our property and

equipment, net by geographic region is summarized as follows:

$423,344

$319,566

$364,963

2010

Year Ended December 31,
2009
(In thousands)

2008

Net revenue:
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $209,583
213,761
International. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$162,023
157,543

$205,162
159,801

$423,344

$319,566

$364,963

Property and equipment, net:
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31,

2010

2009

(In thousands)

$32,104
7,721

$18,015
7,926

$39,825

$25,941

Major Customers. To date, a majority of Harmonic’s net revenue has been derived from relatively few
customers, and Harmonic expects this customer concentration to continue in the foreseeable future. In the years
ended December 31, 2010 and 2009, sales to Comcast accounted for 17% and 16% of net revenue, respectively. In
2008, sales to Comcast and EchoStar accounted for 20% and 12% of net revenue, respectively.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

The Company’s assets are primarily located within the United States of America.

NOTE 16: GUARANTEES

Warranties. The Company accrues for estimated warranty costs at the time of product shipment. Manage-
ment periodically reviews the estimated fair value of its warranty liability and records adjustments based on the
terms of warranties provided to customers, historical and anticipated warranty claims experience, and estimates of
the timing and cost of specified warranty claims. Activity for the Company’s warranty accrual, which is included in
accrued liabilities, is summarized below:

Year Ended
December 31,

2010

2009

(In thousands)

Balance at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 4,186
—
Acquired warranty obligation from Scopus acquisition . . . . . . . . . . . . . . . . . . .
949
Acquired warranty obligation from Omneon acquisition . . . . . . . . . . . . . . . . . .
4,898
Accrual for current period warranties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(5,222)
Warranty costs incurred . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 5,361
2,379
—
991
(4,545)

Balance at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 4,811

$ 4,186

Standby Letters of Credit. As of December 31, 2010, the Company’s financial guarantees consisted of
standby letters of credit outstanding, which were principally related to performance bonds and state requirements
imposed on employers. The maximum amount of potential future payments under these arrangements was
$0.6 million.

Indemnification. Harmonic is obligated to indemnify its officers and the members of its Board of Directors
pursuant to its bylaws and contractual indemnity agreements. Harmonic also indemnifies some of its suppliers and
customers for specified intellectual property matters pursuant to certain contractual arrangements, subject to certain
limitations. The scope of these indemnities varies, but in some instances, includes indemnification for damages and
expenses (including reasonable attorneys’ fees). There have been no amounts accrued in respect of the indem-
nification provisions through December 31, 2010.

Guarantees. At December 31, 2010 and 2009, Harmonic had no other guarantees outstanding.

NOTE 17: COMMITMENTS AND CONTINGENCIES

Commitments — Leases. Harmonic leases its facilities under noncancelable operating leases which expire at
various dates through December 2020. In addition, Harmonic leases vehicles in several foreign countries under
noncancelable operating leases which expire in 2013. Total lease payments related to these operating leases were
$13.3 million, $14.4 million and $14.0 million for the years ended December 31, 2010, 2009 and 2008, respectively.
Future minimum lease payments under noncancelable operating leases at December 31, 2010, are as follows:

Year Ending December 31,

(In thousands)

2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 4,761
5,351
6,720
5,759
6,113
30,485

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$59,189

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

As of December 31, 2010, $4.5 million of these future lease payments were accrued for as part of accrued

excess facility costs. See Note 9 “Restructuring and Excess Facilities.”

Commitments — Royalties. Harmonic has licensed certain technologies from various companies and incor-
porates this technology into its own products and is required to pay royalties usually based on shipment of products.
In addition, Harmonic has obtained research and development grants under various Israeli government programs
that require the payment of royalties on sales of certain products resulting from such research. During the years
ended December 31, 2010, 2009 and 2008 royalty expenses were $3.3 million, $2.6 million and $2.4 million,
respectively.

Purchase Commitments with Contract Manufacturers and Suppliers. The Company relies on a limited
number of contract manufacturers and suppliers to provide manufacturing services for a substantial majority of its
products. In addition, some components, sub-assembly and modules are obtained from a sole supplier or limited
group of suppliers. During the normal course of business, in order to reduce manufacturing lead times and ensure
adequate component supply, the Company enters into agreements with certain contract manufacturers and suppliers
that allow them to procure inventory based upon criteria as defined by the Company.

NOTE 18: LEGAL PROCEEDINGS

In March 2010, Interkey ELC Ltd, or Interkey, filed a lawsuit in Israel alleging breach of contract against
Harmonic and Scopus Video Networks Ltd. (now Harmonic Video Networks Ltd. or “HVN”), which was acquired
by Harmonic in March 2009. The plaintiffs are seeking damages in the amount of 6,300,000 ILS (approximately
$1.7 million). Harmonic believes Interkey’s and its shareholders’ claims are without merit and Harmonic and HVN
intend to vigorously defend themselves against these claims. Based on the foregoing, Harmonic has not recorded a
provision for this claim.

In May 2003, a derivative action, purporting to be on our behalf, was filed in the Superior Court for the County
of Santa Clara against certain current and former officers and directors. The derivative action alleged facts similar to
those alleged in the securities class action filed against Harmonic in 2000 and settled in 2008. The securities class
action alleged that, by making false or misleading statements regarding Harmonic’s prospects and customers and its
acquisition of C-Cube, certain defendants violated Sections 10(b) and 20(a) of the Exchange Act. The complaint in
the securities class action litigation also alleged that certain defendants violated Section 14(a) of the Exchange Act
and Sections 11, 12(a)(2), and 15 of the Securities Act, by filing a false or misleading registration statement,
prospectus, and joint proxy in connection with the C-Cube acquisition. In March 2009, the Court hearing the
derivative action granted final approval of a settlement in connection with the matter. The settlement released
Harmonic’s officers and directors from all claims brought in the derivative lawsuit, and the Company paid
$0.6 million to cover the plaintiff’s attorneys’ fees.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

HARMONIC INC.

sum payment from Harmonic to Litton of $5 million, Litton (i) will not bring suit against Harmonic, any of its
affiliates, customers, vendors, representatives, distributors, or its contract manufacturers for any liability for
making, using, offering for sale, importing, and/or selling any Harmonic products that may have incorporated
technology that was alleged to have infringed on one or more of the relevant patents, and (ii) released Harmonic
from any liability for making, using or selling any Harmonic products that may have infringed on such patents. The
Company recorded a provision of $5.0 million in its selling, general and administrative expenses for the year ended
December 31, 2008. Harmonic paid the settlement amount in January 2009.

An unfavorable outcome on the above referenced or any other litigation matters could require that Harmonic
pay substantial damages, or, in connection with any intellectual property infringement claims, could require that the
Company pay ongoing royalty payments or could prevent the Company from selling certain of its products. As a
result, a settlement of, or an unfavorable outcome on, any of the above referenced or other litigation matters could
have a material adverse effect on Harmonic’s business, operating results, financial position and cash flows.

Harmonic’s industry is characterized by the existence of a large number of patents and frequent claims and
related litigation regarding patent and other intellectual property rights. In particular, leading companies in the telco
industry have extensive patent portfolios. From time to time, third parties have asserted, and may in the future assert,
exclusive patent, copyright, trademark and other intellectual property rights against us or the Company’s customers.
Such assertions arise in the normal course of the Company’s operations. The resolution of any such assertions and
claims cannot be predicted with certainty.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND

FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES.

We maintain “disclosure controls and procedures,” as such term is defined in Rule 13a-15(e) under the
Exchange Act, that are designed to ensure that information required to be disclosed by us in reports that we file or
submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified
in SEC rules and forms, and that such information is accumulated and communicated to our management, including
our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required
disclosure. In designing and evaluating our disclosure controls and procedures, management recognized that
disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not
absolute, assurance that the objectives of the disclosure controls and procedures are met. Additionally, in designing
disclosure controls and procedures, our management necessarily was required to apply its judgment in evaluating
the cost-benefit relationship of possible disclosure controls and procedures. The design of any disclosure controls
and procedures also is based in part upon certain assumptions about the likelihood of future events, and there can be
no assurance that any design will succeed in achieving its stated goals under all potential future conditions.

Based on their evaluation as of the end of the period covered by this Annual Report on Form 10-K, our Chief
Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were
effective.

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING.

Our management’s report on our internal control over financial reporting (as defined in Rules 13a-15(f) and
15d-15(f) under the Exchange Act) and the related attestation report of our independent registered public
accounting firm, are included on pages 66 and 69, respectively, of this Annual Report on Form 10-K, and are
incorporated herein by reference.

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING.

There was no change in our internal control over financial reporting that occurred during the fourth quarter of
fiscal year 2010 that has materially affected, or is reasonably likely to materially affect, our internal control over
financial reporting.

ITEM 9B. OTHER INFORMATION

None.

PART III

Certain information required by Part III is omitted from this Annual Report on Form 10-K pursuant to
Instruction G to Exchange Act Form 10-K, and the Registrant will file its definitive Proxy Statement for its 2011
Annual Meeting of Stockholders, pursuant to Regulation 14A of the Securities Exchange Act of 1934, as amended
(the “2011 Proxy Statement”), not later than 120 days after the end of the fiscal year covered by this Annual Report
on Form 10-K, and certain information included in the 2011 Proxy Statement is incorporated herein by reference.

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Information concerning our directors required by this item will be set forth in the 2011 Proxy Statement and is

incorporated herein by reference.

Information concerning our executive officers required by this item will be set forth in the 2011 Proxy

Statement and is incorporated herein by reference.

Information relating to compliance with Section 16(a) of the Securities Exchange Act of 1934 will be set forth

in the 2011 Proxy Statement and is incorporated herein by reference.

100

Information concerning our audit committee and our audit committee financial expert will be set forth in our

2011 Proxy Statement and is incorporated herein by reference.

Harmonic has adopted a Code of Business Conduct and Ethics for Senior Operational and Financial
Leadership (the “Code”), which applies to its Chief Executive Officer, its Chief Financial Officer, its Corporate
Controller and other senior operational and financial management. The Code is available on the Company’s website
at www.harmonicinc.com.

Harmonic intends to satisfy the disclosure requirement under Form 8-K regarding an amendment to, or waiver
from, a provision of this Code of Ethics by posting such information on our website, at the address specified above,
and, to the extent required by the listing standards of the NASDAQ Global Select Market, by filing a Current Report
on Form 8-K with the Securities and Exchange Commission disclosing such information.

ITEM 11. EXECUTIVE COMPENSATION

The information required by this item will be set forth in the 2011 Proxy Statement and is incorporated herein

by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

AND RELATED STOCKHOLDER MATTERS

Information related to security ownership of certain beneficial owners and security ownership of management
and related stockholder matters will be set forth in the 2011 Proxy Statement and is incorporated herein by
reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR

INDEPENDENCE

The information required by this item will be set forth in the 2011 Proxy Statement and is incorporated herein

by reference.

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

The information required by this item will be set forth in the 2011 Proxy Statement and is incorporated herein

by reference.

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

1. Financial Statements. See Index to Consolidated Financial Statements in Item 8 on page 59 of this Annual

Report on Form 10-K.

2. Financial Statement Schedules. Financial statement schedules have been omitted because the informa-
tion is not required to be set forth herein, is not applicable or is included in the financial statements or notes thereto.

3. Exhibits. The documents listed in the Exhibit Index of this Annual Report on Form 10-K are filed
herewith or are incorporated by reference in this Annual Report on Form 10-K, in each case as indicated therein.

101

Pursuant to the requirements of Section 13 or 15 (d) of the Securities Exchange Act of 1934, the Registrant,
Harmonic Inc., a Delaware corporation, has duly caused this Annual Report on Form 10-K to be signed on its behalf
by the undersigned, thereunto duly authorized, in the City of San Jose, State of California, on March 1, 2011.

SIGNATURES

HARMONIC INC.

By: /s/ PATRICK J. HARSHMAN

Patrick J. Harshman
President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Annual Report on Form 10-K has
been signed by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Signature

Title

Date

/s/ PATRICK J. HARSHMAN
(Patrick J. Harshman)

/s/ CAROLYN V. AVER
(Carolyn V. Aver)

/s/ LEWIS SOLOMON
(Lewis Solomon)

/s/ HAROLD L. COVERT
(Harold L. Covert)

/s/ PATRICK GALLAGHER
(Patrick Gallagher)

/s/ E. FLOYD KVAMME
(E. Floyd Kvamme)

/s/ ANTHONY J. LEY
(Anthony J. Ley)

/s/ WILLIAM REDDERSEN
(William Reddersen)

/s/ DAVID VAN VALKENBURG
(David Van Valkenburg)

President & Chief Executive Officer
(Principal Executive Officer)

March 1, 2011

Chief Financial Officer
(Principal Financial and Accounting
Officer)

March 1, 2011

Chairman

March 1, 2011

Director

March 1, 2011

Director

March 1, 2011

Director

March 1, 2011

Director

March 1, 2011

Director

March 1, 2011

Director

March 1, 2011

102

The following Exhibits to this report are filed herewith or, as shown below, are incorporated herein by

EXHIBIT INDEX

reference.
Exhibit
Number

2.1 (iii)

3.1(vi)
3.2 (xxii)
4.1(i)
4.2 (vii)

4.3 (vii)

4.4(i)

Agreement and Plan of Merger and Reorganization among C-Cube Microsystems, Inc. and
Harmonic Inc. dated October 27, 1999
Certificate of Incorporation of Harmonic Inc., as amended
Amended and Restated Bylaws of Harmonic Inc.
Form of Common Stock Certificate
Preferred Stock Rights Agreement, dated July 24, 2002, between Harmonic Inc. and Mellon
Investor Services LLC
Certificate of Designation of Rights, Preferences and Privileges of Series A Participating Preferred
Stock of Harmonic Inc.
Registration and Participation Rights and Modification Agreement, dated as of July 22, 1994,
among Harmonic Inc. and certain holders of Registrant’s Common Stock
Form of Indemnification Agreement

10.1(i)*
10.2 (xxviii)* 1995 Stock Plan, as amended on May 20, 2010
10.3(i)*
10.4(ii)

1995 Director Option Plan and form of Director Option Agreement
Business Loan Agreement, Commercial Security Agreement and Promissory Note, dated August
26, 1993, as amended on September 14, 1995, between Harmonic Inc. and Silicon Valley Bank
1999 Nonstatutory Stock Option Plan
Lease Agreement for 603-611 Baltic Way, Sunnyvale, California
Lease Agreement for 1322 Crossman Avenue, Sunnyvale, California
Lease Agreement for 646 Caribbean Drive, Sunnyvale, California
Lease Agreement for 632 Caribbean Drive, Sunnyvale, California
First Amendment to the Lease Agreement for 549 Baltic Way, Sunnyvale, California

10.5 (viii)*
10.6(iv)
10.7(iv)
10.8(iv)
10.9(iv)
10.10(iv)
10.11 (xxviii)* 2002 Board Stock Plan, as amended on May 20, 2010
10.12 (xxvi)* 2002 Employee Stock Purchase Plan and Form of Subscription Agreement, as amended on May

10.13(v)

10.14(ix)

10.15(x)*

10.16(xi)

10.17 (xii)

10.18 (xix)

10.19 (xiii)

10.20 (xiv)

21, 2009
Supply License and Development Agreement, dated as of October 27, 1999 between C-Cube
Microsystems and Harmonic Inc.
First Amendment to Second Amended and Restated Loan and Security Agreement between
Harmonic Inc., as Borrower, and Silicon Valley Bank, as Lender, dated as of December 16, 2005
Change of Control Severance Agreement between Harmonic Inc. and Patrick Harshman, effective
May 30, 2006
Agreement and Plan of Merger among Harmonic Inc., Edinburgh Acquisition Corporation,
Entone Technologies, Inc., Entone, Inc., Entone Technologies (HK) Limited, Jim Jones, as
stockholders’ representative, and U.S. Bank, National Association, as escrow agent, dated as
of August 21, 2006
Amendment No. 1 to Agreement and Plan of Merger among Harmonic Inc., Edinburgh
Acquisition Corporation, Entone Technologies, Inc., Entone, Inc., Entone Technologies (HK)
Limited, Jim Jones, as stockholders’ representative, and U.S. Bank, National Association, as
escrow agent, dated November 29, 2006
Second Amended and Restated Loan and Security Agreement, dated December 17, 2004, between
Harmonic Inc. and Silicon Valley Bank
Amendment No. 2 to the Second Amended and Restated Loan and Security Agreement, dated as
of December 15, 2006, between Harmonic Inc. and Silicon Valley Bank
Amendment No. 3 to the Second Amended and Restated Loan and Security Agreement, dated
March 15, 2007, between Harmonic Inc. and Silicon Valley Bank

103

Exhibit
Number

10.22 (xv)*

10.21 (xv)*

Change of Control Severance Agreement between Harmonic Inc. and Charles Bonasera, effective
April 24, 2007
Change of Control Severance Agreement between Harmonic Inc. and Neven Haltmayer, effective
April 19, 2007
Agreement and Plan of Merger among Rhozet Corporation, Dusseldorf Acquisition Corporation,
Harmonic Inc. and David Trescot, as shareholder representative, dated July 25, 2007
Purchase Agreement, dated October 31, 2007 between Harmonic Inc. and Merrill Lynch & Co
10.24 (xvii)
10.25 (xviii)* Change of Control Severance Agreement, dated October 1, 2007, between Harmonic Inc. and

10.23 (xvi)

10.26 (xix)

Matthew Aden
Amendment No. 4 to the Second Amended and Restated Loan and Security Agreement, dated
March 12, 2008, between Harmonic Inc. and Silicon Valley Bank

10.27 (xxiii) Agreement and Plan of Merger among Harmonic Inc., Sunrise Acquisition Ltd., and Scopus Video

Networks Ltd., dated December 22, 2008

10.28 (xxiv)* Harmonic Inc. 2002 Director Stock Plan Restricted Stock Unit Agreement
10.29 (xxiv)** Professional Service Agreement between Harmonic Inc. and Plexus Services Corp., dated

September 22, 2003

10.30 (xxiv)** Amendment, dated January 6, 2006, to the Professional Services Agreement for Manufacturing
between Harmonic Inc. and Plexus Services Corp., dated September 22, 2003
10.31 (xxiv)** Addendum 1, dated November 26, 2007, to the Professional Services Agreement between

10.32 (xx)*

Harmonic Inc. and Plexus Services Corp., dated September 22, 2003
Change of Control Severance Agreement between Harmonic Inc. and Nimrod Ben-Natan,
effective April 11, 2008

10.33 (xxi)* Change of Control Severance Agreement between Harmonic Inc. and Robin N. Dickson, effective

June 3, 2008

10.34 (xxv)* Harmonic Inc. 1995 Stock Plan Restricted Stock Unit Agreement
10.35 (xxv)

Amendment No. 5 to Second Amended and Restated Loan and Security Agreement, dated March
4, 2009, between Harmonic Inc. and Silicon Valley Bank

10.36 (xxvii) Lease Agreement between Harmonic Inc. and CRP North First Street, L.L.C. dated December 15,

2009

10.37 (xxix) Amendment No. 6 to Second Amended and Restated Loan and Security Agreement, dated March

4, 2010, between Harmonic Inc. and Silicon Valley Bank

10.38 (xxx)* Change of Control Agreement between Harmonic Inc. and Carolyn V. Aver, effective June 1, 2010
10.39 (xxxi)* Transition Agreement between Harmonic Inc. and Robin N. Dickson, effective June 15, 2010
10.40 (xxxii) Agreement and Plan of Reorganization among Harmonic Inc., Orinda Acquisition Corporation,
Orinda Acquisition, LLC, Omneon, Inc. and Shareholder Representative Services, LLC, as
Representative, dated May 6, 2010

10.41 (xxxiii)* Omneon Video Networks, Inc. 1998 Stock Option Plan (as amended through February 27, 2007)
10.42 (xxxiii)* Omneon, Inc. 2008 Equity Incentive Plan
10.43

Lease Agreement between Omneon, Inc. and Headlands Realty Corporation, dated February 22,
2008
Subsidiaries of Harmonic Inc.
Consent of Independent Registered Public Accounting Firm
Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of
2002
Certification of Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of
2002
Certification of Principal Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

21.1
23.1
31.1

31.2

32.1

104

Exhibit
Number

32.2

101

Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
The following materials from Registrant’s Annual Report on Form 10-K for the year ended
December 31, 2010, formatted in Extensible Business Reporting Language (XBRL): Condensed
Consolidated Balance Sheets at December 31, 2010 and December 31, 2009; (ii) Condensed
Consolidated Statements of Operations for the Years Ended December 31, 2010, December 31,
2009 and December 31, 2008; (iii) Consolidated Statements of Stockholders’ Equity and
Comprehensive Income (Loss) for the Years Ended December 31, 2010, December 31, 2009
and December 31, 2008, (iv) Condensed Consolidated Statements of Cash Flows for the Years
Ended December 31, 2010, December 31, 2009 and December 31, 2008; and (v) Notes to
Condensed Consolidated Financial Statements, tagged as blocks of text.
XBRL information is furnished and not filed herewith, is not part of a registration statement or
prospectus for purposes of Sections 11 or 12 of the Securities Exchange Act of 1933, as amended,
is deemed not filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended,
and otherwise is not subject to liability under these sections.

* Indicates a management contract or compensatory plan or arrangement relating to executive officers or

directors of the Company.

i Previously filed as an Exhibit to the Company’s Registration Statement on Form S-1 No. 33-90752.
ii Previously filed as an Exhibit to the Company’s Annual Report on Form 10-K for the year ended

December 31, 1995.

iii Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated November 1, 1999.
iv Previously filed as an Exhibit to the Company’s Quarterly Report on Form 10-Q for the quarter ended

June 30, 2000.

v Previously filed as an Exhibit to the Company’s Registration Statement on Form S-4 No. 333-33148.
vi Previously filed as an Exhibit to the Company’s Annual Report on Form 10-K for the year ended

December 31, 2001.

vii Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated July 25, 2002.
viii Previously filed as an Exhibit to the Company’s Current Report on Form S-8 dated June 5, 2003.

ix Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated December 22, 2005.
x Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated May 31, 2006.
xi Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated August 25, 2006.
xii Previously filed as an Exhibit to the Company’s Annual Report on Form 10-K for the year ended

December 31, 2006.

xiii Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated December 21, 2006.
xiv Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated March 22, 2007.
xv Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated April 25, 2007.
xvi Previously filed as an Exhibit to the Company’s Quarterly Report on Form 10-Q for the quarter ended

June 29, 2007.

xvii Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated November 1, 2007.
xviii Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated November 13, 2007.
xix Previously filed as an Exhibit to the Company’s Current Annual Report on Form 10-K for the year ended

December 31, 2007.

xx Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated April 16, 2008.
xxi Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated June 6, 2008.
xxii Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated November 10, 2008.
xxiii Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated December 24, 2008.

105

xxiv Previously filed as an Exhibit to the Company’s Current Annual Report on Form 10-K for the year ended

December 31, 2008.

xxv Previously filed as an Exhibit to the Company’s Quarterly Report on Form 10-Q for the quarter ended

April 3, 2009.

xxvi Previously filed as an Exhibit to the Company’s Current Report on Form S-8 dated June 10, 2009.
xxvii Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated December 18, 2009.
xxviii Previously filed as an Exhibit to the Company’s Registration Statement on Form S-8, dated May 28, 2010.
xxix Previously filed as an Exhibit to the Company’s Quarterly Report on Form 10-Q dated May 12, 2010.
xxx Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated June 3, 2010.
xxxi Previously filed as an Exhibit to the Company’s Current Report on Form 8-K dated June 18, 2010.
xxxii Previously filed as an Exhibit to the Company’s Quarterly Report on Form 10-Q dated August 10, 2010.
xxxiii Previously filed as an Exhibit to the Company’s Registration Statement on Form S-8 dated September 21, 2010.

106