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Illumina

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FY2004 Annual Report · Illumina
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T H E   L E A D I N G   E D G E   O F   G E N E T I C   A N A LY S I S

Illumina, Inc.
9885 Towne Centre Drive
San Diego, CA 92121
www.illumina.com

2004 Annual Report

 
 
 
06414_AR_Cvr_20  5/6/05  12:50 PM  Page 2

Illumina is keeping customers on the 
leading edge of research by enabling better
performance, higher value, and multiple
applications on a single microarray platform. 

4 QUARTERS OF SEQUENTIAL REVENUE GROWTH (IN MILLIONS OF DOLLARS)

14 QUARTERS OF SEQUENTIAL REVENUE GROWTH (IN MILLIONS OF DOLLARS)

$14.8

$10.7

$10.8

$11.5

$13.5

7

$0.8

$1.3

$1.9

$3.0

$8.2

$3.9

$4.3

$4.8

$14.8

$13.5

$10.7

$10.8

$11.5

$8.2

Q4
2001

Q1
2002

Q2
2002

Q3
2002

Q4
2002

Q1
2003

Q2
2003

Q3
2003

1

$0.7

$0.8

$1.3

$1.9

Q4
2003

$3.0

$3.9

Q1
2004

$4.3

Q2
2004

$4.8

Q3
2004

Q4
2004

Q3
2001

Q4
2001

Q1
2002

Q2
2002

Q3
2002

Q4
2002

Q1
2003

Q2
2003

Q3
2003

Q4
2003

Q1
2004

Q2
2004

Q3
2004

Q4
2004

Corporate Directory

Corporate Information

BOARD OF DIRECTORS
Jay T. Flatley
President, Chief Executive Officer and 
Acting Chief Financial Officer
Illumina

CORPORATE HEADQUARTERS
9885 Towne Centre Drive
San Diego, CA 92121
+1 858.202.4500
www.illumina.com

INDEPENDENT ACCOUNTANTS
Ernst & Young LLP
San Diego, CA 92101

John R. Stuelpnagel, D.V.M.
Senior Vice President and Chief Operating Officer
Illumina

Daniel M. Bradbury
Chief Operating Officer
Amylin Pharmaceuticals

Karin Eastham
Executive Vice President and Chief Operating
Officer
The Burnham Institute

Paul Grint, M.D.
Senior Vice President and Chief Medical Officer
Zephyr Sciences, Inc.

William H. Rastetter, Ph.D.
Executive Chairman 
Biogen Idec

David R. Walt, Ph.D.
Robinson Professor of Chemistry
Tufts University

EXECUTIVE OFFICERS
Jay T. Flatley
President, Chief Executive Officer and 
Acting Chief Financial Officer

John R. Stuelpnagel, D.V.M.
Senior Vice President and Chief Operating Officer

David L. Barker, Ph.D.
Vice President and Chief Scientific Officer

Paulette D. Cabral
Vice President of Human Resources

David C. Douglas
Vice President of Manufacturing

Noemi C. Espinosa
Vice President of Intellectual Property

Scott D. Kahn, Ph.D.
Vice President and Chief Information Officer

Robert C. Kain
Vice President of Engineering

Alan Kersey
Vice President and Site General Manager

Tristan Orpin
Vice President of Worldwide Sales

TRANSFER AGENT
EquiServe Trust Company N.A.
150 Royall Street
Canton, MA 02121
+1 781.575.3400
www.equiserve.com

LEGAL COUNSEL
Heller Ehrman LLP
Menlo Park, CA 94025

FORM 10-K
Included with this report is a copy of the Company’s Form 10-K filed
with the Securities and Exchange Commission. Additional copies are
available by contacting Illumina’s Investor Relations Department.

www.illumina.com
investor@illumina.com
+1 858.202.4750

ANNUAL MEETING
The Company’s Annual Meeting of Stockholders will be held at the
Company’s corporate headquarters at 10:00 a.m. on June 28, 2005.

SELECTED COMMON STOCK DATA
The Company’s common stock, par value $.01, has been traded under
the symbol ILMN since July 28, 2000 on the NASDAQ National Market.

As of May 2, 2005, there were approximately 312 record holders 
of the Company’s common stock. The Company has not paid any cash
dividends since its inception and does not anticipate paying any cash
dividends in the foreseeable future.

“Safe Harbor” Statement under the Private Securities Litigation
Reform Act 1995: this release may contain forward-looking state-
ments that involve risks and uncertainties. Among the important 
factors that could cause actual results to differ materially from 
those in any forward-looking statements are the costs and outcome
of Illumina’s litigation with Affymetrix, the Company’s ability to 
scale and integrate CyVera technology, the ability to further scale
oligo synthesis output and technology to satisfy market demand
deriving from the Company’s collaboration with Invitrogen, Illumina’s
ability to further develop and commercialize its Infinium assay and
BeadArray platform technologies, to deploy new gene expression
and genotyping products and applications for its platform technolo-
gy, to manufacture robust Sentrix® arrays and Oligator® oligonu-
cleotides, and other factors detailed in the Company’s filings with
the Securities and Exchange Commission including its recent filings
on Forms 10-K and 10-Q or in information disclosed in public confer-
ence calls, the date and time of which are released beforehand.
Illumina disclaims any intent or obligation to update these forward-
looking statements beyond the date of this release. 

© 2005, Illumina, Inc. All rights reserved. Illumina, BeadArray, Array of Arrays, Sentrix, GoldenGate, DASL, Infinium, Making Sense Out of Life and Oligator 
are trademarks of Illumina, Inc. Printed in the U.S.A. 070-2004-009.

By almost any measure, 
Illumina had a terrific year in 2004.

We delivered strong financial results

for stockholders and powerful product 

performance for customers. We ended

the year with an exciting pipeline that 

will drive system and consumable

sales growth in 2005 and beyond.

We also laid the strategic groundwork

for continued long-term success.

Throughout the year, our employee

team worked tirelessly to execute 

on an ambitious set of milestones 

to keep Illumina on the leading edge

of genetic analysis.

CEO Jay Flatley and on left,
John Stuelpnagel, COO.

2004 HIGHLIGHTS

We set five specific investor milestones for 2004.

A fifth milestone, shipping our multi-sample,

The first related to cash burn, with a target of less 

genome-wide expression arrays, slipped until March 

than $15 million. Thanks to strong revenue growth 

of this year, when we announced broad commercial

of over 80% compared to 2003 and high gross margins,

availability and began putting these products in the

we burned just $12 million, ending the year with 

hands of customers around the world. Our Sentrix

$67 million in cash.

We aimed to sign 20 genotyping service contracts in

2004 and dramatically exceeded this number by book-

Human-6 and HumanRef-8 BeadChips are delivering 

to the marketplace an industry-leading combination 

of performance, throughput and value.

ing 52 such agreements. Some of these projects were

We made several key appointments in 2004 and early

quite sizable, requiring tens of millions of genotypes.

2005, naming Karin Eastham and Paul Grint to our

This is consistent with an important trend whereby

Board of Directors and Bill Rastetter non-executive

researchers are forming consortia to combine sample

Chairman of the Board. We named Scott Kahn our

collections, achieving greater statistical power and

new Chief Information Officer, and also promoted

increasing their chances of making key discoveries.

John Stuelpnagel to Chief Operating Officer.

A third milestone related to system sales. We executed

well above our 20-system goal, shipping a total of 42

benchtop BeadStations and three production BeadLabs.

We now have a global installed base of over 50 systems.

In addition, we implemented an upgrade path that

allows customers to purchase a BeadStation and then

add robotics, LIMS and other components to increase

. . . delivering to the marketplace
an industry-leading combination
of throughput and performance.

the level of system automation and the sophistication 

Before 2004 drew to a close, we signed a significant

of sample tracking. Illumina systems and software 

oligonucleotide collaboration agreement with

support a growing list of applications and array formats,

Invitrogen Corporation, a large life science company

satisfying a broad range of research demands.

also located in the San Diego area. Under the terms 

A fourth milestone involved the International HapMap

Project. Illumina was a major project participant, with

responsibility for developing assays for approximately

15% of the SNP markers mapped in the Project’s first

phase. Over 60% of the total project in this phase was

completed using Illumina technology. By the end of 2004,

we had developed and screened, along with HapMap

partners using Illumina technology, over 600,000 assays

compared to our 400,000-assay milestone.

The initial scope of the HapMap Project is now closed

and the final efforts will be focused on bioinformatical-

ly identifying the so-called “tagSNPs” that have the

highest value in performing genome-wide scans and

disease-association studies. Researchers will soon

begin deploying these investigative tools—many of

which are based on Illumina assays—to design and

conduct bigger projects using larger sample sets, with

the potential for truly seminal discovery.

of the agreement, Invitrogen will invest $3.4 million 

in Illumina’s Oligator® DNA synthesis facility to

extend our capabilities into tube-based oligos—

a segment that is four times larger than the plate-

size segment we currently serve. Illumina will turn

over all oligo sales and marketing responsibility to

Invitrogen, which has approximately 350 salespeople

around the world and offices in more than 70 coun-

tries. Profits from collaboration products will be 

split equally between the two companies.

We have set a joint target with Invitrogen to achieve

annual oligo revenue of $100 million in a few years—

far beyond that which either company could have

achieved alone. Beyond the ideal strategic fit, this 

deal allows Illumina to focus all future commercial

investments in building out sales and marketing

resources to support our genetic analysis systems,

arrays and reagents.

Researchers can now utilize a single 
microarray platform and migrate easily 
from one application to another. 

We believe we can leverage our investment 
in infrastructure and technology to accelerate
new product development.

PRIMING OUR GROWTH

Our benchtop BeadStation systems gained good traction

This achievement carries a twofold implication.

in 2004. We expect to nearly double our installed base in

2005, driven principally by new array products and assay

methods. These new applications should also increase

reagent consumption at current system locations.

First, our customers will benefit from the remarkable

flexibility, performance and cost points of Illumina

technology. Researchers will be able to utilize a single

microarray platform and migrate easily from one 

One example—introduced in January 2005—is our

application to another at varying scales of sample

DASL™ assay, a powerful new approach for generating

throughput and overall project scope.

gene expression profiles from partially degraded 

RNAs such as those found in formalin-fixed, paraffin-

embedded (FFPE) samples. An estimated 400 million

FFPE samples exist in North America for cancer alone.

Many of these samples represent known clinical 

outcomes, or endpoints, a potential gold mine of 

information when linked with the underlying gene

expression profiles and an exciting prospect for 

the validation and testing of biomarkers associated 

with cancer and other complex diseases. We believe 

the DASL assay will open up a new avenue for gene 

expression at high multiplex and low cost per sample.

We have the ability to offer 
SNP content with the highest
information value. 

The implication is equally profound for Illumina.

We’ve invested significant resources developing key

competencies and fine-tuning our manufacturing 

infrastructure to support the creation of a very broad

portfolio of offerings. We expect to leverage that 

We plan to launch our Infinium™ assay in the second

infrastructure and accelerate cycle times for new 

quarter. The Infinium assay enables dense genome-

product development. For example, we will develop 

wide genotyping, virtually unconstrained selection 

and ship two additional whole-genome expression

of SNP markers and multiplex levels that are limited

products in 2005, one for mouse and one for rat.

only by the number of beads on the BeadChip. Our first

Infinium product will contain over 100,000 markers,

nearly 30,000 of which are located in genes. This 

product will be ideally suited for large-scale, disease-

association studies. Before the middle of 2006, we

expect to launch products in this family containing

250,000, 500,000 and 1,000,000 markers.

By the middle of this year, Illumina will have developed

high-value assay and bead-based array products that

support both genotyping and gene expression, with

whole-genome and focused approaches, fixed and 

custom content, and on two different BeadArray™

platforms: the Array Matrix and the BeadChip.

SETTING THE STAGE 
TO ENTER NEW MARKETS

BEYOND THE NUMBERS

A number of our 2004 system sales include associated

Beside financial measures, one of our most important

agreements that provide rights to biomarkers discov-

measures of success and, in fact, a hallmark of the

ered and validated with Illumina technology. These

Illumina brand, is the relationships we build with 

agreements are the beginning of a commercial strategy

customers. We’re highly focused on building collabora-

that will take advantage of emerging market opportu-

tive interactions and doing so in the context of helping

nities involving the use of microarrays for clinical

scientists generate compelling results.

research and molecular diagnostics.

Fundamental to our success is our employee team.

In April of this year, we took another critical step 

We are continually impressed both by the innovation

in that direction with our acquisition of CyVera

and the sheer dedication of our human resources.

Corporation.

CyVera is developing a digital microbead platform that

is highly complementary with our existing BeadArray

technology. CyVera’s rod-shaped beads can support

both nucleic acid and protein probe content. The tech-

nology is ideally suited to address the growing markets

As we developed our new whole-genome offerings 

and expanded manufacturing capabilities over the 

past year, we asked much of our employees. In every

case, they have responded and risen to each chal-

lenge—underscoring the power of our shared goal 

of enabling personalized medicine.

in low to mid-multiplex applications, ranging from ten

In closing, we’d like to quote a large customer who

to 1000 targets—a perfect complement to Illumina’s

characterized Illumina as “. . . the group of the future.

denser microarray solutions that offer multiplex levels

Their technology is outstanding, their accuracy and

of 384 to over 200,000 targets.

precision is superb and the customer service is 

CyVera technology will be integrated into an expanded

incredibly responsive.”

portfolio of offerings based on BeadArray technology

We aim to keep it that way.

and high-performance assay solutions. The first prod-

ucts from CyVera are expected to be available in the

second half of 2006. As a result, Illumina will be posi-

tioned to offer a comprehensive approach to biomarker

discovery and in-vitro and molecular diagnostic mar-

kets, including those that require low as well as high-

complexity testing.

The emerging molecular diagnostic market is an excit-

ing opportunity with significant revenue potential.

In order to best leverage our technology and capture

significant value from this opportunity, we will seek

collaborators and partners with a strong breadth and

depth of experience in the diagnostics market.

Thank you for your ongoing support.

JAY T. FLATLEY
President, Chief Executive Officer and 
Acting Chief Financial Officer

JOHN R. STUELPNAGEL, D.V.M.
Senior Vice President and Chief Operating Officer

Invitrogen will invest $3.4 million in Illumina's
Oligator ® facility to extend DNA synthesis
capability into tube-based products.

2004 RESULTS: form 10-K >

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 10-K

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

For the fiscal year ended January 2, 2005

or

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

For the transition period from 

 to 

.

¥

n

Commission file number: 000-30361

Illumina, Inc.

(Exact name of Registrant as Specified in Its Charter)

Delaware
(State or other Jurisdiction of
Incorporation or Organization)

9885 Towne Centre Drive,
San Diego, California
(Address of Principal Executive Offices)

33-0804655
(I.R.S. Employer
Identification No.)

92121
(zip code)

Registrant’s telephone number, including area code:
(858) 202-4500

Securities registered pursuant to Section 12(b) of the Act:
None

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

Common Stock, $.01 par value
(Title of class)

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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is
not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive
proxy  or  information  statements  incorporated  by  reference  in  Part  III  of  this  Form  10-K  or  any
amendment to this Form 10-K. n

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of

the Act). Yes ¥

No n

As  of  January  31,  2005,  there  were  38,124,708  shares  of  the  Registrant’s  Common  Stock
outstanding. The aggregate market value of the Common Stock held by non-affiliates of the Registrant
(based on the closing price for the Common Stock on the Nasdaq National Market on June 30, 2004)
was approximately $211,848,212. This amount excludes an aggregate of 4,291,431 shares of common
stock held by officers and directors and each person known by the Registrant to own 10% or more of
the  outstanding  common  stock.  Exclusion  of  shares  held  by  any  person  should  not  be  construed  to
indicate that such person possesses the power, direct or indirect, to direct or cause the direction of
management  or  policies  of  the  Registrant,  or  that  such  person  is  controlled  by  or  under  common
control with the Registrant

DOCUMENTS INCORPORATED BY REFERENCE

Portions  of  the  Registrant’s  definitive  proxy  statement  for  the  annual  meeting  of  stockholders

expected to be held on May 19, 2005 are incorporated by reference into Part III of this Report.

ILLUMINA, INC.

FORM 10-K
For the fiscal year ended JANUARY 2, 2005

TABLE OF CONTENTS

Item 1
Item 2
Item 3
Item 4

Business********************************************************************
Properties ******************************************************************
Legal Proceedings***********************************************************
Submission of Matters to a Vote of Security Holders ****************************

PART I

PART II

Item 5

Item 6
Item 7

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer
Purchases of Equity Securities ************************************************
Selected Financial Data ******************************************************
Management’s Discussion and Analysis of Financial Condition and Results of
Operation ******************************************************************
Item 7A Quantitative and Qualitative Disclosures about Market Risk **********************
Financial Statements and Supplementary Data *********************************
Item 8
Changes in and Disagreements with Accountants on Accounting and Financial
Item 9
Disclosure ******************************************************************
Item 9A Controls and Procedures *****************************************************
Item 9B Other Information ***********************************************************

PART III

Item 10 Directors and Executive Officers of the Registrant ******************************
Executive Compensation *****************************************************
Item 11
Security Ownership of Certain Beneficial Owners and Management***************
Item 12
Certain Relationships and Related Transactions *********************************
Item 13
Principal Accounting Fees and Services ****************************************
Item 14

Page

2
16
16
18

18
20

21
43
44

44
44
45

46
46
46
47
47

Exhibits, Financial Statement Schedules****************************************
Item 15
Signatures****************************************************************************
Financial Statements ******************************************************************

48
52
F-1

PART IV

1

Item 1. Business.

PART I

This Annual Report on Form 10-K may contain forward-looking statements within the meaning of
Section 27A of the Securities Act of 1933, and  Section 21E of  the  Securities  Exchange  Act  of 1934.
These statements relate to future events or our future financial performance. We have attempted to
identify forward-looking statements by terminology including ‘‘anticipates,’’ ‘‘believes,’’ ‘‘can,’’ ‘‘con-
tinue,’’ ‘‘could,’’ ‘‘estimates,’’ ‘‘expects,’’ ‘‘intends,’’ ‘‘may,’’ ‘‘plans,’’ ‘‘potential,’’ ‘‘predicts,’’ ‘‘should’’
or ‘‘will’’ or the negative of these terms or other comparable terminology. These statements are only
predictions and involve known and unknown risks, uncertainties and other factors, including the risks
outlined under ‘‘Factors Affecting Operating Results,’’ contained in Item 7 — ‘‘Management’s Discus-
sion and Analysis of Financial Condition and Results of Operation,’’ that may cause our actual results,
levels of activity, performance or achievements to be materially different from any future results, levels
or activity, performance or achievements expressed or implied by these forward-looking statements.
Although we believe that the expectations reflected in the forward-looking statements are reasonable,
we cannot guarantee future results, levels of activity, performance or achievements. We are not under
any duty to update any of the forward-looking statements after the date we file this Annual Report on
Form 10-K or to conform these statements to actual results, unless required by law.

Illumina˛, Array of ArraysTM, BeadArrayTM, DASLTM, GoldenGate˛, InfiniumTM, Sentrix˛ and Oligator˛
are our trademarks. This report also contains brand names, trademarks or service marks of companies
other  than  Illumina,  and  these  brand  names,  trademarks  and  service  marks  are  the  property  of  their
respective holders.

Available Information

Our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K,
and all amendments to those reports are available free of charge on our website, www.illumina.com.
The information on our website is not incorporated by reference into this report. Such reports are made
available as soon as reasonably practicable after filing with the Securities and Exchange Commission.
The SEC also maintains an Internet site at www.sec.gov that contains reports, proxy and information
statements, and other information regarding issuers that electronically file with the SEC.

Overview

We are a leading developer and marketer of next-generation tools for the large-scale analysis of
genetic variation and function. Understanding genetic variation and function is critical to the develop-
ment of personalized medicine, a key goal of genomics. Our tools provide information that could be
used to improve drugs and therapies, customize diagnoses and treatment, and cure disease.

The sequencing of the human genome has driven demand for tools that can assist researchers in
processing  the  billions  of  tests  necessary  to  convert  raw  genetic  data  into  medically  valuable
information. This requires functional analysis of highly complex biological systems, involving a scale of
experimentation not previously practical. Using our technologies, we have developed a comprehensive
line of products that can address the scale of experimentation and the breadth of functional analysis
required to help achieve the goals of molecular medicine.

2

Our  patented  BeadArray  technology  uses  microscopic  beads  randomly  deposited  in  wells  to
achieve  a  level  of  miniaturization  that  allows  for  a  new  scale  of  experimentation.  A  microarray  is  a
collection  of  miniaturized  test  sites  arranged  on  a  surface  that  permits  many  tests,  or  assays,  to  be
performed in parallel. We assemble our arrays using relatively inexpensive materials. Our proprietary
manufacturing process allows us to easily adapt the arrays to a broad range of applications, including
both genotyping and gene expression. These characteristics allow us to create next-generation arrays
with  a  unique  combination  of  high  throughput,  cost  effectiveness  and  flexibility.  In  addition,  our
complementary  Oligator  technology  permits  parallel  synthesis  of  the  millions  of  different  pieces  of
DNA necessary to perform large-scale genetic analysis on arrays.

We provide both products and services that utilize our proprietary technologies. During 2001, we
launched our commercial genotyping service product line which combines our BeadArray technology
with  an  automated,  laboratory  information  management  system,  or  LIMS,  controlled  process  to
provide high throughput identification of the most common form of genetic variation, known as single
nucleotide  polymorphisms,  or  SNPs.  We  also  began  the  sale  of  custom  synthesized  pieces  of  DNA
called oligonucleotides, or oligos, using our proprietary Oligator technology.

In  2002,  we  announced  the  launch  of  our  production-scale  BeadLab.  This  integrated  turnkey
system is built around our proprietary BeadArray technology. Included in the system are the BeadArray
Reader, GoldenGate assay protocols, LIMS and analytical software, fluid-handling robotics, and access
to  Sentrix  arrays  and  our  reagent  kits  for  analyzing  genetic  sequences.  Our  Sentrix  Array  Matrix  is  a
collection  of  individual  arrays  arranged  in  an  Array  of  Arrays  pattern  compatible  with  standard
microtiter plates, our reagent kit uses highly multiplexed GoldenGate assay protocols which allow up
to  1536  SNPs  to  be  analyzed  at  one  time  in  a  sample  and  our  BeadArray  Reader  is  a  proprietary
scanner  used  to  read  the  results  of  the  experiments  captured  on  our  arrays.  When  installed,  the
BeadLab is able to routinely produce up to 1.4 million genotypes per day.

Also  in  2002,  we  were  named  the  largest  U.S.  participant  in  the  $100  million  first  phase  of  the
International HapMap Project funded by the National Institutes of Health. This project is an internation-
ally funded successor project to the Human Genome Project that is creating a map of genetic variations
that may be used to perform disease-related research. This map of the human genome will allow more
rapid and efficient large-scale genetic association studies aimed at discovering variants contributing to
human  disease  and  differential  response  to  drug  treatments.  We  are  one  of  five  funded  first  phase
U.S.  participants  in  a  worldwide  initiative  that  includes  research  groups  in  Canada,  China,  Japan,
Nigeria and the United Kingdom. We are directly responsible for screening over 15% of the assays in
the  first  phase  of  this  project.  This  effort  leverages  our  Oligator  DNA  synthesis  capability  and  the
production-scale  throughput  of  our  genotyping  services  operation.  Our  BeadLab  is  being  used  by
organizations responsible for creating over 60% of the assays in the first phase of this project, which we
expect to be completed in early 2005.

In early 2003, we completed the installation of and recorded revenue for our first BeadLab, and as

of January 2, 2005, we have installed nine BeadLabs.

In 2003, we announced the launch of several new products, including 1) a new array format, the
Sentrix BeadChip, which significantly expands market opportunities for our BeadArray technology and
provides  increased  experimental  flexibility  for  life  science  researchers;  2)  a  gene  expression  product
line  on  both  the  Sentrix  Array  Matrix  and  the  Sentrix  BeadChip  that  allows  researchers  to  analyze  a
focused set of genes across eight to 96 samples on a single array; and 3) a benchtop SNP genotyping
and gene expression system, the BeadStation, for performing moderate-scale genotyping and gene
expression using our technology. The BeadStation includes our BeadArray Reader, analysis software
and assay reagents and is designed to match the throughput requirements and variable automation
needs of individual research groups and core labs. Sales of these products began in early 2004 and, as
of January 2, 2005, we have shipped 42 BeadStations.

3

In 2004, we announced the launch of new Sentrix BeadChips for whole-genome gene expression
and  whole-genome  genotyping.  The  whole-genome  gene  expression  BeadChips  are  designed  to
enable high-performance, cost-effective, whole-genome expression profiling of multiple samples on a
single  chip,  resulting  in  a  dramatic  reduction  in  cost  of  whole-genome  expression  analysis  while
allowing researchers to expand the scale and reproducibility of large-scale biological experimentation.
The  whole-genome  genotyping  BeadChip  can  be  scaled  to  unlimited  levels  of  multiplexing  without
compromising data quality and will provide scientists the ability to query, in parallel, a high-value set of
over 100,000 SNPs. In 2004, we also announced two new versions of the Sentrix Array Matrix designed
for researchers who want to take advantage of our technology, but whose projects require fewer SNPs
per sample than the number utilized on our standard 1536-plex array products.

In  late  2004,  we  announced  a  strategic  collaboration  with  Invitrogen  Corporation  to  synthesize
and  distribute  oligos.  Under  the  agreement,  we  intend  to  expand  our  Oligator  DNA  synthesis
technology, and Invitrogen will be responsible for sales, marketing and technical support. Profits from
sales of collaboration products will be divided equally between the two companies.

In  early  2005,  we  expanded  our  gene  expression  portfolio  by  announcing  the  launch  of  a  new
assay,  DASL,  for  generating  gene  expression  profiles  from  RNA  samples  including  those  containing
partially degraded RNAs. We also announced a standard DASL cancer panel. Prior to our DASL assay,
degraded RNA samples have been reliably assayed only with expensive, low-multiplex approaches.

In February 2005, we signed a definitive agreement and plan of merger with CyVera Corporation,
a privately-held Connecticut-based company, pursuant to which CyVera will become a wholly-owned
subsidiary of Illumina. CyVera’s digital-microbead platform is highly complementary to our portfolio of
products  and  services  and  upon  closing  of  the  transaction,  will  become  an  integral  part  of  our
BeadArray technology. The acquisition is expected to provide us with a comprehensive approach to
bead-based assays for biomarker R&D and in-vitro and molecular diagnostic opportunities, including
those that require low-complexity as well as high-complexity testing. The aggregate consideration for
the  transaction  is  $17.5  million,  consisting  of  approximately  1.5  million  shares  of  Illumina  common
stock and the payment of approximately $2.3 million of CyVera’s liabilities at the closing. The closing is
subject to customary closing conditions and is expected to occur by the end of March 2005. We expect
the first products based on CyVera’s technology to be available in the second half in 2006.

We are seeking to expand our customer base for our BeadArray technology; however, we can give

no assurance that our sales efforts will continue to be successful.

We were incorporated in California in April 1998. We reincorporated in Delaware in July 2000. Our
principal executive offices are located at 9885 Towne Centre Drive, San Diego, California 92121. Our
telephone number is (858) 202-4500.

Industry Background

Genetic Variation and Function

Every  person  inherits  two  copies  of  each  gene,  one  from  each  parent.  The  two  copies  of  each
gene may be identical, or they may be different. These differences are referred to as genetic variation.
Examples of the physical consequences of genetic variation include differences in eye and hair color.
Genetic variation can also have important medical consequences, including predisposition to disease
and  differential  response  to  drugs.  Genetic  variation  affects  diseases,  including  cancer,  diabetes,
cardiovascular  disease  and  Alzheimer’s  disease.  In  addition,  genetic  variation  may  cause  people  to
respond differently to the same drug. Some people may respond well, others may not respond at all,
and still others may experience adverse side effects. The most common form of genetic variation is a
Single Nucleotide Polymorphism, or SNP. A SNP is a variation in a single position in a DNA sequence.
It is estimated that the human genome contains between three and six million SNPs.

4

While  in  some  cases  a  single  SNP  will  be  responsible  for  medically  important  effects,  it  is  now
believed that the genetic component of most major diseases is the result of the interaction of many
SNPs.  Therefore,  it  is  important  to  investigate  many  SNPs  together  in  order  to  discover  medically
valuable information.

Current efforts to understand genetic variation and function have primarily centered around SNP

genotyping and gene expression profiling.

SNP Genotyping

SNP genotyping is the process of determining which SNPs are present in each of the two copies of
a  gene,  or  other  portion  of  DNA  sequence,  within  an  individual  or  other  organism.  The  use  of  SNP
genotyping to obtain meaningful statistics on the effect of an individual SNP or a collection of SNPs,
and to apply that information to clinical trials and diagnostic testing, requires the analysis of millions of
SNP  genotypes  and  the  testing  of  large  populations  for  each  disease.  For  example,  a  single  large
clinical  trial  could  involve  genotyping  200,000  SNPs  per  patient  in  1,000  patients,  thus  requiring
200  million  assays.  Using  previously  available  technologies,  this  scale  of  SNP  genotyping  was  both
impractical and prohibitively expensive.

Large-scale SNP genotyping will be used for a variety of applications, including genomics-based
drug  development,  clinical  trial  analysis,  disease  predisposition  testing,  and  disease  diagnosis.  SNP
genotyping  can  also  be  used  outside  of  healthcare,  for  example  in  the  development  of  plants  and
animals with desirable commercial characteristics. These markets will require billions of SNP genotyp-
ing assays annually.

Gene Expression Profiling

Gene expression profiling is the process of determining which genes are active in a specific cell or
group  of  cells  and  is  accomplished  by  measuring  mRNA,  the  intermediary  between  genes  and
proteins. Variation in gene expression can cause disease, or act as an important indicator of disease or
predisposition  to  disease.  By  comparing  gene  expression  patterns  between  cells  from  different
environments, such as normal tissue compared to diseased tissue or in the presence or absence of a
drug, specific genes or groups of genes that play a role in these processes can be identified. Studies of
this type, used in drug discovery, require monitoring thousands, and preferably tens of thousands, of
mRNAs  in  large  numbers  of  samples.  Once  a  smaller  set  of  genes  of  interest  has  been  identified,
researchers  can  then  examine  how  these  genes  are  expressed  or  suppressed  across  numerous
samples,  for  example,  within  a  clinical  trial.  The  high  cost  of  current  gene  expression  methods  has
limited the development of the gene expression market.

As  gene  expression  patterns  are  correlated  to  specific  diseases,  gene  expression  profiling  is
becoming  an  increasingly  important  diagnostic  tool.  Diagnostic  use  of  expression  profiling  tools  is
anticipated  to  grow  rapidly  with  the  combination  of  the  sequencing  of  various  genomes  and  the
availability of more cost-effective technologies.

5

Our Technologies

BeadArray Technology

We have developed a proprietary array technology that enables the large-scale analysis of genetic
variation and function. Our BeadArray technology combines microscopic beads and a substrate in a
simple proprietary manufacturing process to produce arrays that can perform many assays simultane-
ously.  Our  BeadArray  technology  provides  a  unique  combination  of  high  throughput,  cost  effective-
ness,  and  flexibility.  We  achieve  high  throughput  with  a  high  density  of  test  sites  per  array  and  our
ability to format arrays in either a pattern arranged to match the wells of standard microtiter plates or in
various configurations in the format of standard microscope slides. We maximize cost effectiveness by
reducing consumption of expensive reagents and valuable samples, and from the low manufacturing
costs  associated  with  our  technologies.  Our  ability  to  vary  the  size,  shape  and  format  of  the  well
patterns and to create specific bead pools, or sensors, for different applications provides the flexibility
to address multiple markets and market segments. We believe that these features have enabled our
BeadArray  technology  to  become  a  leading  platform  for  the  emerging  high-growth  market  of
SNP genotyping and expect they will enable us to become a key player in the gene expression market.

Our proprietary BeadArray technology combines microwells etched into a substrate and specially
prepared beads that self-assemble into an array. We have deployed our BeadArray technology in two
different Sentrix array formats, the Array Matrix and the BeadChip. Our first bead-based product was
the Array Matrix which incorporates fiber optic bundles. We have the fiber optic bundles manufactured
to  our  specifications,  which  we  cut  into  lengths  of  less  than  one  inch.  Each  bundle  contains
approximately  50,000  individual  fibers  and  96  of  these  bundles  are  placed  into  an  aluminum  plate,
which forms an Array Matrix. BeadChips are fabricated in microscope slide-shaped sizes with varying
numbers of sample sites per slide. Both formats are chemically etched to create tens of thousands of
wells for each sample site.

In  a  separate  process,  we  create  sensors  by  affixing  a  specific  type  of  molecule  to  each  of  the
billions of microscopic beads in a batch. We make different batches of beads, with the beads in a given
batch  coated  with  one  particular  type  of  molecule.  The  particular  molecules  on  a  bead  define  that
bead’s function as a sensor. For example, we create a batch of SNP sensors by attaching a particular
DNA  sequence  to  each  bead  in  the  batch.  We  combine  batches  of  coated  beads  to  form  a  pool
specific to the type of array we intend to create. A bead pool one milliliter in volume contains sufficient
beads to produce thousands of arrays. One of the advantages of this technology is that it allows us to
create universal arrays for SNP genotyping, and by varying the reagent kit, still be able to use the array
to test for any combination of SNPs.

To form an array, a pool of coated beads is brought into contact with the array surface where they
are  randomly  drawn  into  the  wells,  one  bead  per  well.  The  tens  of  thousands  of  beads  in  the  wells
comprise  our  individual  arrays.  Because  the  beads  assemble  randomly  into  the  wells,  we  perform  a
final  procedure  called  decoding  in  order  to  determine  which  bead  type  occupies  which  well  in  the
array. We employ several proprietary methods for decoding, a process that requires only a few steps to
identify all the beads in the array. One beneficial by-product of the decoding process is a validation of
each bead in the array. This quality control test characterizes the performance of each bead and can
identify and eliminate use of any empty wells. We ensure that each bead type on the array is sufficiently
represented by having multiple copies of each bead type. This improves the reliability and accuracy of
the resulting data by allowing statistical processing of the results of identical beads.

6

An  experiment  is  performed  on  the  Array  Matrix  by  preparing  a  sample,  such  as  DNA  from  a
patient, and introducing it to the array. The design features of our Array Matrix allow it to be simply
dipped into a solution containing the sample, whereas our BeadChip allows processing of samples on
a  slide.  The  molecules  in  the  sample  bind  to  their  matching  molecules  on  the  coated  bead.  The
BeadArray Reader detects the matched molecules by shining a laser on the fiber optic bundle or on
the  BeadChip.  Since  the  molecules  in  the  sample  have  a  structure  that  causes  them  to  emit  light  in
response  to  a  laser,  detection  of  a  binding  event  is  possible.  This  allows  the  measurement  of  the
number of molecules bound to each coated bead, resulting in a quantitative analysis of the sample.

Oligator Technology

Genomic applications require many different short pieces of DNA that can be made synthetically,
called  oligonucleotides.  For  example,  SNP  genotyping  typically  requires  three  to  four  different
oligonucleotides  per  assay.  A  SNP  genotyping  experiment  analyzing  10,000  SNPs  may  therefore
require  30,000  to  40,000  different  oligonucleotides,  contributing  significantly  to  the  expense  of  the
experiment.

We have designed our proprietary Oligator technology for the parallel synthesis of many different
oligonucleotides to meet the requirements of large-scale genomics applications. We believe that our
Oligator technology is substantially more cost effective and provides higher throughput than available
commercial  alternatives.  Our  synthesis  machines  are  computer  controlled  and  utilize  many  robotic
processes  to  minimize  the  amount  of  labor  used  in  the  manufacturing  process.  Each  of  these
synthesizers  can  produce  up  to  3072  oligos  in  parallel,  using  very  small  amounts  of  material.  We
believe  both  of  these  attributes  are  substantial  improvements  over  other  existing  technologies.  In
2005,  we  intend  to  implement  fourth-generation  Oligator  technology  which  will  further  expand  our
production capabilities and extend our technology into tube-based oligo products.

Key Advantages of Our BeadArray and Oligator Technologies

We believe that our BeadArray and Oligator technologies provide distinct advantages, in a variety
of  applications,  over  competing  technologies,  by  creating  cost-effective,  highly  miniaturized  arrays
with the following advantages:

High Throughput. The miniaturization of our BeadArray technology provides significantly greater
information content per unit area than any other array known to us. To further increase throughput, we
have  formatted  our  arrays  in  a  pattern  arranged  to  match  the  wells  of  standard  microtiter  plates,
allowing throughput levels of up to 150,000 unique assays per microtiter plate, as well as the use of
laboratory  robotics  to  speed  process  time.  The  Oligator’s  parallel  synthesis  capability  allows  us  to
manufacture the diversity of oligonucleotides necessary to support large-scale genomic applications.

Cost Effectiveness. Our array products substantially reduce the cost of experiments as a result of
our  proprietary  manufacturing  process  and  our  ability  to  capitalize  on  cost  reductions  generated  by
advances  in  fiber  optics,  digital  imaging  and  bead  chemistry.  In  addition,  these  products  require
smaller reagent volumes than other array technologies, and therefore reduce reagent costs. Our cost-
effective Oligator technology further reduces reagent costs, as well as the cost of coating beads.

Flexibility. A  wide  variety  of  conventional  chemistries  are  available  for  attaching  different
molecules, such as DNA, RNA, proteins, and other chemicals to beads. By using beads, we are able to
take advantage of these chemistries to create a wide variety of sensors, which we assemble into arrays
using the same proprietary manufacturing process. In addition, we can have fiber optic bundles and
BeadChips manufactured in multiple shapes and sizes with wells organized in various arrangements to
optimize  them  for  different  markets  and  market  segments.  In  combination,  the  use  of  beads  and
etched  wells  provides  the  flexibility  and  scalability  for  our  BeadArray  technology  to  be  tailored  to
perform many applications in many different market segments, from drug discovery to diagnostics. Our
Oligator  technology  allows  us  to  manufacture  a  wide  diversity  of  lengths  and  quantities  of
oligonucleotides.

7

Quality. The  high  density  of  beads  in  each  array  enables  us  to  have  multiple  copies  of  each
individual bead type. We measure the copies simultaneously and combine them into one data point.
This allows us to make a comparison of each bead against its own population of identical beads, which
permits the statistical calculation of a more reliable and accurate value for each data point. Finally, the
manufacture of the array includes a proprietary decoding step that also functions as a quality control
test of every bead on every array, improving the overall quality of the data.

Our Strategy

Our  goal  is  to  make  our  BeadArray  platforms  the  industry  standard  for  products  and  services

utilizing array technologies. We plan to achieve this by:

) focusing on emerging high-growth markets;

) rapidly  commercializing  our  BeadLab,  BeadStation,  Sentrix  Array  Matrix  and  BeadChip

products;

) expanding our technologies into multiple product lines and market segments; and

) strengthening our technological leadership.

Products and Services

The  first  implementation  of  our  BeadArray  technology,  the  Sentrix  Array  Matrix,  is  a  disposable
matrix with 96 fiber optic bundles arranged in a pattern that matches the standard 96-well microtiter
plate. Each fiber optic bundle performs more than 1,500 unique assays. Therefore, one Sentrix Array
Matrix can perform nearly 150,000 individual assays simultaneously, more than any other commercial
array system known to us. The BeadChip, introduced in 2003, is fabricated in multiple configurations to
support multiple applications and scanning technologies.

We have provided genotyping services using our proprietary BeadArray technology since 2001. In
addition,  we  have  developed  our  first  genotyping  and  gene  expression  products  based  on  this
technology.  These  products  include  disposable  Sentrix  Array  Matrices  and  BeadChips,  GoldenGate
reagent kits for SNP genotyping, BeadArray Reader scanning instruments and an evolving portfolio of
custom and standard gene expression products.

SNP Genotyping

In 2001, we introduced the first commercial application of our BeadArray technology by launching
our  SNP  genotyping  services  product  line.  Since  this  launch  we  have  had  peak  days  in  which  we
operated at over two million genotypes per day based on individual samples. To our knowledge, no
other  genotyping  platform  can  achieve  comparable  levels  of  throughput  while  delivering  such  high
accuracy and low cost.

We designed our first consumable BeadArray product, the Sentrix Array Matrix, for SNP genotyp-
ing. The Sentrix Array Matrix uses a universal format that allows it to analyze any set of SNPs. We have
also developed reagent kits based on GoldenGate assay protocols and the BeadArray Reader, a laser
scanner, which is used to read our array products.

Depending  on  throughput  and  automation  requirements,  our  customers  can  select  the  system
configuration  to  best  meet  their  needs.  For  production-scale  throughput,  our  BeadLab  would  be
appropriate,  and  for  moderate-scale  throughput,  our  BeadStation  would  be  selected.  Our  BeadLab
includes  our  BeadArray  Reader,  combined  with  LIMS,  standard  operating  procedures  and  analytical
software  and  fluid  handling  robotics.  This  production-scale  system  was  commercialized  in  late  2002
and when installed, this system can routinely produce up to 1.4 million genotypes per day.

8

The  BeadStation,  a  system  for  performing  moderate-scale  genotyping  designed  to  match  the
throughput requirements of individual research groups and core labs, was commercialized in late 2003.
The  BeadStation  includes  our  BeadArray  Reader  and  genotyping  and/or  gene  expression  analysis
software.  Our  BeadStations  are  fully  upgradeable  to  a  full  BeadLab  through  various  steps  that  add
automation, sample preparation equipment and LIMS capability.

For use in SNP genotyping, both the BeadLab and BeadStation utilize GoldenGate assay reagents
and  our  Array  Matrices  and  will  soon  support  a  high-density  version  of  our  BeadChip.  The  Sentrix
BeadChip allows simultaneous processing of 16 samples and uses identical content as the Sentrix Array
Matrix.

Also  in  2003,  we  announced  the  availability  of  an  assay  set  for  genetic  linkage  analysis.  This
standard  product  has  been  deployed  in  our  genotyping  services  operation  and  is  also  sold  to
customers who use our SNP genotyping systems. Genetic linkage analysis can help identify chromo-
somal regions with potential disease associations across a related set of samples.

In  2004,  we  announced  a  new  Sentrix  BeadChip  for  whole-genome  genotyping.  This  BeadChip
will  provide  scientists  the  ability  to  interrogate  over  100,000  SNPs  located  in  high-value  genetic
regions of the human genome.

Gene Expression Profiling

With  the  addition  of  application  specific  accessory  kits,  our  production-scale  BeadLabs  and
BeadStations are capable of performing a growing number of applications including gene expression
profiling.

In 2003, we introduced our focused set gene expression products on both the Sentrix Array Matrix
and  Sentrix  BeadChip  platforms.  For  high-throughput  projects,  our  system  includes  a  BeadArray
Reader for imaging Sentrix Array Matrices and BeadChips, a hybridization chamber and software for
data  extraction.  For  research  projects  that  require  moderate  throughput,  a  version  of  the  Sentrix
BeadChip analyzes eight samples in parallel and can be scanned on a portion of the installed base of
Axon  Instruments’  GenePixTM  scanners.  In  addition,  we  have  developed  standard  gene  expression
products for each of the human, mouse and arabidopsis genomes.

In  2004,  we  announced  the  Sentrix  Human-6  and  HumanRef-8  Expression  BeadChip  products.
Both products will allow large-scale expression profiling of multiple samples on a single chip and are
imaged  using  our  BeadArray  Reader.  The  Human-6  BeadChip  is  designed  to  analyze  six  discrete
whole-human-genome  samples  on  one  chip,  interrogating  in  each  sample  approximately  48,000
transcripts  from  the  estimated  30,000  genes  in  the  human  genome.  The  HumanRef-8  BeadChip
product  analyzes  eight  samples  in  parallel  against  24,000  transcripts  from  the  roughly  22,000  genes
represented  in  the  consensus  RefSeq  database,  a  well-characterized  whole-genome  subset  used
broadly  in  genetic  analysis.  We  expect  that  these  new  gene  expression  BeadChips  will  dramatically
reduce the cost of whole-genome expression analysis, allowing researchers to expand the scale and
reproducibility of large-scale biological experimentation.

In  early  2005,  we  introduced  the  new  DASL  assay  for  generating  gene  expression  profiles  from
RNA samples, including formalin-fixed, paraffin-embedded (FFPE) samples and other samples contain-
ing  degraded  RNAs.  The  DASL  assay  enables  researchers  to  measure  RNA  abundance  of  over  500
genes in parallel per sample. We also released a standard DASL cancer panel. It has been estimated
that there are over 400 million FFPE tissue samples archived in North America for cancer alone. Many
of these samples represent known clinical outcomes which will yield important information when linked
with underlying gene expression profiles. To date, degraded RNA samples have been reliably assayed
only  with  expensive,  low-multiplex  approaches.  Our  DASL  assay  generates  RNA  profiles  at  high
multiplex and at a low cost per sample as compared to existing technologies.

9

Scanning Instrumentation

The BeadArray Reader, an instrument we developed, is a key component of both our production-
scale BeadLab and our benchtop BeadStation. This scanning equipment uses a laser to read the results
of experiments that are captured on our arrays and was designed to be used in all areas of genetic
analysis that use our Sentrix Array Matrices and Sentrix BeadChips.

High-Throughput Synthesis

We have put in place an oligonucleotide manufacturing facility that currently has the capability of
producing approximately 20 million oligonucleotides per year. In addition to their use to coat beads,
these oligonucleotides are components of the reagent kits for our BeadArray products and are used for
assay development. Because our production capacity exceeds our internal needs, we began to offer
oligonucleotides for sale to high volume users in 2001. We provide oligonucleotides in a wide range of
lengths and in several scales, with the ability to add many types of modifications. We offer a range of
quality control options and have implemented a laboratory information management system to control
much of the manufacturing process. In 2003, we introduced the first standard product offerings in our
Oligator  product  line,  a  whole-genome  oligonucleotide  reference  set  designed  and  optimized  for
spotted gene expression microarrays, and in 2004, we introduced a mouse genome oligo set, also for
use on spotted gene expression arrays. We believe our Oligator technology is more cost effective than
competing technologies, which has allowed us to market our oligonucleotides under a price leadership
strategy  while  still  achieving  attractive  gross  margins.  In  2005,  in  connection  with  a  collaboration
agreement with Invitrogen Corporation, we intend to implement fourth-generation Oligator technol-
ogy which will further expand our production capabilities and extend our technology into tube-based
oligo products.

Collaboration with Invitrogen Corporation

In December 2004, we entered into a strategic collaboration with Invitrogen Corporation. Through
this  collaboration,  we  intend  to  expand  our  Oligator  DNA  synthesis  technology  and  combine  that
capability  with  Invitrogen’s  sales,  marketing  and  distribution  channels.  Under  the  terms  of  the
agreement,  Invitrogen  has  agreed  to  pay  us  up  to  $3.4  million,  which  we  plan  to  invest  in  our
San Diego facility to enable implementation of fourth-generation Oligator technology and extend the
technology into tube-based oligo products. In addition, the agreement provides for the transfer of our
Oligator  technology  into  two  Invitrogen  facilities  outside  North  America.  Profit  from  the  sale  of
collaboration products will be divided equally between the two companies.

Research and Development

We have made substantial investments in research and development since our inception. We have
assembled  a  team  of  skilled  engineers  and  scientists  who  are  specialists  in  biology,  chemistry,
informatics, instrumentation, optical systems, software, manufacturing and other related areas required
to  complete  the  development  of  our  products.  Our  research  and  development  efforts  have  focused
primarily on the tasks required to optimize our BeadArray and Oligator technologies and to support
commercialization of the products and services derived from these technologies. These efforts include
among others:

) We enhanced the quality and manufacturing yield of our Sentrix Array Matrices and BeadChips.
We  are  exploring  ways  to  continue  to  increase  the  level  of  automation  in  the  manufacturing
process  to  further  reduce  the  time  and  cost  of  producing  arrays.  We  currently  have  the
infrastructure in place to manufacture Sentrix Array Matrices and BeadChips in sufficient quantity
to meet anticipated internal and external needs.

10

) We introduced a number of initiatives in 2002 and 2003 to improve the yield and quality of our
oligonucleotides while reducing cost substantially. By refining our understanding of the design
and operation of our Oligator technology, we have been able to make numerous changes in our
process, which we believe provides us a more cost effective system than competing technolo-
gies.  Our  oligonucleotide  manufacturing  facility  currently  has  the  capability  of  producing
approximately 20 million oligonucleotides per year. In 2005, we intend to expand our Oligator
technology  under  a  collaboration  agreement  with  Invitrogen  Corporation.  This  expansion  will
enable  implementation  of  fourth-generation  Oligator  technology  and  extend  the  technology
into tube-based oligo products.

) We have developed the BeadArray Reader, a laser scanning instrument that scans our Sentrix
array platforms. Laser scanners provide the high sensitivity and resolution required to address
the  extremely  dense  geometries  of  our  bead-based  arrays.  We  made  the  first  commercial
shipments of our scanners in the first quarter of 2003 as part of our BeadLab.

) We completed development of and launched our Direct Hyb and DASL gene expression assays
on both array formats. We believe the combination of our gene expression products flexibility
and low-per-sample cost will enable larger and more meaningful gene expression studies.

) We  have  signed  a  definitive  agreement  to  acquire  CyVera  Corporation,  a  company  whose
technology is highly complementary to our portfolio of products and services and upon closing
of the transaction will become an integral part of our BeadArray technology. The acquisition is
expected  to  provide  us  with  a  comprehensive  approach  to  bead-based  assays  for  biomarker
R&D  and  in-vitro  and  molecular  diagnostic  opportunities,  including  those  that  require  low-
complexity as well as high-complexity testing.

) We  have  been  exploring  the  underlying  molecular  biology  and  chemistry  issues  related  to
developing assays and performing experiments on our BeadArray platforms. By improving our
processes and protocols, we have substantially increased the number of assays we can process
simultaneously in a single sample on our arrays.

Our  research  and  development  expenses  for  the  fiscal  years  2004,  2003  and  2002  (exclusive  of
charges  relating  to  stock  based  compensation  of  $0.8  million,  $1.3  million  and  $2.4  million,  respec-
tively)  were  $21.1  million,  $22.5  million  and  $26.8  million,  respectively.  We  expect  research  and
development expense to increase in 2005 as compared to 2004 as we continue to expand our research
and product development efforts.

Government Grants

Government  grants  allow  us  to  fund  internal  scientific  programs  and  exploratory  research.  We
retain  ownership  of  all  intellectual  property  and  commercial  rights  generated  during  these  projects,
subject to a non-exclusive, non-transferable, paid-up license to practice, for or on behalf of the United
States, inventions made with federal funds. This license is retained by the U.S. government as provided
by applicable statutes and regulations. We do not believe that the retained license will have any impact
on our ability to market our products, and we do not need government approval with respect to this
license  in  order  to  enter  into  collaborations  or  other  relationships  with  third  parties.  We  are  the
recipient of a grant from the National Institutes of Health covering our participation in the first phase of
the International HapMap Project, which is a $100.0 million, internationally funded successor project to
the  Human  Genome  Project  that  will  help  identify  a  map  of  genetic  variations  that  may  be  used  to
perform disease-related research. We could receive up to $9.1 million of funding for this project which
covers basic research activities, the development of SNP assays and the genotyping to be performed
on those assays. As of the end of 2004, we had approximately $0.7 million of funding remaining related
to this project, which is expected to be received in early 2005.

11

Intellectual Property

We have an extensive patent portfolio, including ownership of, or exclusive licenses to, 29 issued
U.S. patents and 76 pending U.S. patent applications, including seven allowed applications that have
not  yet  issued  as  patents,  some  of  which  derive  from  a  common  parent  application.  Our  issued
patents,  which  cover  various  aspects  of  our  BeadArray,  oligonucleotide  synthesis  and  chemical
detection  technologies,  expire  between  2011  and  2020.  We  are  seeking  to  extend  this  patent
protection  on  our  BeadArray,  GoldenGate,  Oligator,  Sentrix  and  related  technologies.  We  have
received  or  filed  counterparts  for  many  of  these  patents  and  applications  in  one  or  more  foreign
countries.

We  also  rely  upon  trade  secrets,  know-how,  copyright  and  trademark  protection,  as  well  as
continuing technological innovation and licensing opportunities to develop and maintain our competi-
tive position. Our success will depend in part on our ability to obtain patent protection for our products
and  processes,  to  preserve  our  copyrights  and  trade  secrets,  to  operate  without  infringing  the
proprietary rights of third parties and to acquire licenses related to enabling technology or products
used with our BeadArray, DASL, GoldenGate, Sentrix and Oligator technologies.

We are party to various exclusive and non-exclusive license agreements with third parties, which
grant  us  rights  to  use  key  aspects  of  our  array  technology,  assay  methods,  chemical  detection
methods,  reagent  kits  and  scanning  equipment.  We  have  exclusive  licenses  from  Tufts  University  to
patents  that  cover  our  use  of  BeadArray  technology.  These  patents  were  filed  by  Dr.  David  Walt,  a
member  of  our  board  of  directors,  the  Chairman  of  our  Scientific  Advisory  Board  and  one  of  our
founders. Our exclusive licenses expire with the termination of the underlying patents, which will occur
between 2010 and 2020. In 2001, we entered into a non-exclusive license agreement with Amersham
Biosciences that covers certain technology contained in our BeadArray Reader. In 2002, we obtained a
non-exclusive  license  from  Dade  Behring  Marburg  GmbH  that  relates  to  certain  components  of  our
GoldenGate assay. We also have additional nonexclusive licenses from various third parties for other
components  of  our  products.  In  all  cases,  the  agreements  remain  in  effect  over  the  term  of  the
underlying patents, may be terminated at our request without further obligation and require that we
pay customary royalties while the agreement is in effect.

Marketing and Distribution

Our current products address the genetic analysis portion of the life sciences market, in particular,
experiments  involving  SNP  genotyping  and  gene  expression  profiling.  These  experiments  may  be
involved in many areas of biologic research including basic human disease research, pharmaceutical
drug discovery and development, pharmacogenomics, toxicogenomics and agricultural research. Our
potential customers include pharmaceutical, biotechnology, agrichemical,  diagnostics  and consumer
products companies, as well as academic or private research centers. The genetic analysis market is
relatively  new  and  emerging  and  its  size  and  speed  of  development  will  be  ultimately  driven  by,
among other items:

) the ability of the research community to extract medically valuable information from genomics
and to apply that knowledge to multiple areas of disease-related research and treatment,

) the  availability  of  sufficiently  low  cost,  high-throughput  research  tools  to  enable  the  large

amount of experimentation required to study genetic variation and function, and

) the availability of government and private industry funding to perform the research required to

extract medically relevant information from genomic analysis.

12

We market and distribute our products directly to customers in North America, major European
markets, Japan and Singapore. In each of these areas we have dedicated sales, service and application
support  personnel  responsible  for  expanding  and  managing  their  respective  customer  bases.  In
markets outside of these areas, primarily the Pacific Rim countries, we sell our products and provide
services  to  customers  through  distributors  that  specialize  in  life  science  products.  We  expect  to
significantly  increase  our  sales  and  distribution  resources  during  2005  and  beyond  as  we  launch  a
number of new products and expand the number of customers that can use our products.

In late 2004, we entered into a strategic collaboration with Invitrogen Corporation with a goal of
leveraging our strength in oligo synthesis with Invitrogen’s extensive sales, marketing and distribution
channels. We expect to transition all responsibility for oligo sales, marketing and technical support to
Invitrogen in 2005.

Manufacturing

We  manufacture  our  array  platforms,  reagent  kits,  scanning  equipment  and  oligonucleotides  in-
house and believe that we currently have the ability to manufacture these in sufficient quantity to meet
anticipated  internal  and  external  needs.  We  currently  depend  upon  outside  suppliers  for  materials
used in the manufacture of our products. We intend to continue, and may extend, the outsourcing of
portions  of  our  manufacturing  process  to  subcontractors  where  we  determine  it  is  in  our  best
commercial interests.

During 2001, we moved into a new facility which allowed us to design the manufacturing areas to
fit our specific processes, and optimize material flow and personnel movement. In addition, we have
implemented information management systems for many of our manufacturing and services operations
to manage all aspects of material and sample use. We adhere to access and safety standards required
by federal, state and local health ordinances, such as standards for the use, handling and disposal of
hazardous substances.

Competition

Although we expect that our BeadArray products and services will provide significant advantages
over currently available products and services, we expect to encounter intense competition from other
companies  that  offer  products  and  services  for  the  SNP  genotyping  and  gene  expression  markets.
These  include  companies  such  as  Aclara  Biosciences  (recently  acquired  by  ViroLogic),  Affymetrix,
Agilent,  Amersham  Biosciences  (recently  acquired  by  GE  Corp.),  Applied  Biosystems,  Beckman
Coulter, Caliper Technologies, Luminex, ParAllele Bioscience, Perlegen Sciences, Sequenom and Third
Wave  Technologies.  Many  of  these  companies  have  or  will  have  substantially  greater  financial,
technical, research, and other resources and larger, more established marketing, sales, distribution and
service organizations than we do. In addition, they may have greater name recognition than we do in
the markets we need to address and in some cases a large installed base of systems. Each of these
markets  is  very  competitive  and  we  expect  new  competitors  to  emerge  and  the  intensity  of
competition  to  increase  in  the  future.  In  order  to  effectively  compete  with  these  companies,  we  will
need to demonstrate that our products have superior throughput, cost and accuracy advantages over
the  existing  products.  Rapid  technological  development  may  result  in  our  products  or  technologies
becoming obsolete. Products offered by us could be made obsolete either by less expensive or more
effective  products  based  on  similar  or  other  technologies.  Although  we  believe  that  our  technology
and products will offer advantages that will enable us to compete effectively with these companies, we
cannot assure you that we will be successful.

Segment and Geographic Information

We operate in one business segment, for the development, manufacture and commercialization of
tools  for  genetic  analysis.  Our  operations  are  treated  as  one  segment  as  we  only  report  operating
results on an aggregate basis to chief operating decision makers of Illumina.

13

During 2004, $26.4 million, or 52%, of our total revenues came from customers outside the United
States, as compared to $14.4 million, or 51%, in 2003. We expect that sales to international customers
will continue to be an important and growing source of revenues. We have sales support resources in
Western  Europe  and  direct  sales  offices  in  Japan  and  Singapore.  In  addition,  we  have  distributor
relationships in various countries in the Pacific Rim region.

Information  about  the  geographies  in  which  we  operate  can  be  found  in  the  Notes  to  Consoli-
dated  Financial  Statements  at  Note  11,  ‘‘Segment  Information,  Geographic  Data  and  Significant
Customers.’’

Seasonality

Historically, customer purchasing patterns have not shown significant seasonal variation, although
demand for our products is usually lowest in the first quarter of the calendar year and highest in the
fourth quarter of the calendar year as customers spend unused budget allocations before the end of
the year.

Environmental Matters

We  are  dedicated  to  the  protection  of  our  employees  and  the  environment.  Our  operations
require  the  use  of  hazardous  materials  which  subject  us  to  a  variety  of  federal,  state  and  local
environmental and safety laws and regulations. We believe we are in material compliance with current
applicable  laws  and  regulations;  however,  we  could  be  held  liable  for  damages  and  fines  should
contamination of the environment or individual exposures to hazardous substances occur. In addition,
we cannot predict how changes in these laws and regulations, or the development of new laws and
regulations, will affect our business operations or the cost of compliance.

Employees

As of January 2, 2005, we had a total of 278 employees, 60 of whom hold Ph.D. degrees and 37 of
such Ph.D. degreed employees are engaged in full-time research and development activities. None of
our employees is represented by a labor union. We consider our employee relations to be positive.

Executive Officers

Age

Position

Our executive officers as of February 28, 2005, are as follows:
Name
Jay T. Flatley *******************
David L. Barker, Ph.D. **********
Paulette D. Cabral **************
David C. Douglas ***************
Noemi C. Espinosa *************
Robert C. Kain *****************
Timothy M. Kish ****************
Arnold Oliphant, Ph. D **********
Tristan B. Orpin*****************
John R. Stuelpnagel, DVM *******

President, Chief Executive Officer and Director
Vice President, Chief Scientific Officer
Vice President of Human Resources
Vice President of Manufacturing
Vice President of Intellectual Property
Vice President of Engineering
Vice President, Chief Financial Officer
Vice President of Scientific Operations
Vice President of Worldwide Sales
Founder, Senior Vice President, Chief Operating
Officer and Director

52
63
60
50
46
44
53
45
39
47

14

Jay T. Flatley has served as our President, Chief Executive Officer and a Director since October
1999.  Prior  to  joining  Illumina,  Mr.  Flatley  was  co-founder,  President,  Chief  Executive  Officer  and  a
Director  of  Molecular  Dynamics,  a  life  sciences  company,  from  May  1994  to  September  1999.  He
served in various other positions with that company from 1987 to 1994. From 1985 to 1987, Mr. Flatley
was  Vice  President  of  Engineering  and  Vice  President  of  Strategic  Planning  at  Plexus  Computers,  a
UNIX computer company. Mr. Flatley also serves as a director at GenVault. Mr. Flatley holds a B.A. in
Economics  from  Claremont  McKenna  College  and  a  B.S.  and  M.S.  in  Industrial  Engineering  from
Stanford University.

David L. Barker, Ph.D., has served as our Vice President and Chief Scientific Officer since March
2000.  Prior  to  joining  us,  Dr.  Barker  was  Vice  President  and  Chief  Science  Advisor  at  Amersham
Pharmacia Biotech, a life sciences company, from September 1998 to March 2000. From May 1997 to
September 1998, Dr. Barker was Vice President of Research and Business Development at Molecular
Dynamics. From 1992 to 1997, he was Vice President of Scientific Development. From 1988 to 1995,
he held various other positions with that company. Dr. Barker holds a B.S. in Chemistry from California
Institute of Technology and received his Ph.D. in Biochemistry from Brandeis University.

Paulette D. Cabral has served as our Vice President of Human Resources since March 2001. Prior
to  joining  us,  Ms.  Cabral  was  the  Vice  President  of  Human  Resources  at  Marimba,  Inc.,  an  internet
infrastructure  company,  from  July  2000  to  February  2001.  From  December  1996  to  July  2000,
Ms. Cabral held various human resource positions at Molecular Dynamics; from 1999 to 2000, she was
Vice President of Human Resources. Previous to that she held various positions at Acuson Corporation
and Spectra Physics. Ms. Cabral holds a B.A. in Sociology from San Jose State University.

David C. Douglas has served as our Vice President of Manufacturing since January 2001. Prior to
joining us, Mr. Douglas was Vice President of Operations at POSDATA Inc., an information technology
equipment company, from July 1989 to December 2000. From July 1988 to July 1989, Mr. Douglas
was  Test  Operations  Manager  at  Acuson  Computed  Sonography,  a  medical  equipment  company.
Previous to that he held various positions at Plexus Computers and Spectra Physics. Mr. Douglas holds
a B.S. in Electronics Engineering Technology from Oregon Institute of Technology.

Noemi C. Espinosa has served as our Vice President of Intellectual Property since May 2000 and
our Corporate Secretary since January 2001. Prior to joining us, Ms. Espinosa was a partner with the
firm  of  Brobeck,  Phleger  &  Harrison  LLP  from  January  1992  to  April  2000,  having  joined  the  firm  in
1990.  From  1983  to  1990,  Ms.  Espinosa  was  associated  with  the  intellectual  property  firm  of
Townsend  &  Townsend.  Ms.  Espinosa  holds  a  B.S.  in  Chemical  Engineering  from  San  Jose  State
University and a J.D. from the University of California, Hastings College of Law. She is registered to
practice before the United States Patent and Trademark Office.

Robert  C.  Kain  has  served  as  our  Vice  President  of  Engineering  since  December  1999.  Prior  to
joining  us,  Mr.  Kain  was  Senior  Director  of  Engineering  at  Molecular  Devices  from  July  1999  to
December  1999.  Previously,  Mr.  Kain  served  as  Director  of  Microarray  Engineering  at  Molecular
Dynamics from August 1998 to July 1999 and in other positions from August 1996 to August 1998.
From  1983  to  1988,  Mr.  Kain  was  employed  at  DatagraphiX,  an  information  technology  equipment
company. Mr. Kain received his B.S. in Physics from San Diego State University and his M.B.A. from
St. Mary’s College.

Timothy M. Kish has served as our Vice President and Chief Financial Officer since May 2000. Prior
to  joining  us,  Mr.  Kish  was  Vice  President,  Finance  and  Chief  Financial  Officer  at  Biogen,  Inc.,  a
biopharmaceutical company, from September 1993 to April 2000. He served as Corporate Controller
of  that  company  from  1986  to  1993.  From  1983  to  1986,  Mr.  Kish  was  Director  of  Finance  at  Allied
Health  &  Scientific  Products  Company,  a  subsidiary  of  Allied-Signal  Corporation.  Mr.  Kish  holds  a
B.B.A. from Michigan State University and an M.B.A. from the University of Minnesota.

15

Arnold Oliphant, Ph.D., has served as our Vice President of Scientific Operations since October
2000. Prior to joining us, Dr. Oliphant was Vice President of Functional Genomics at Myriad Genetics, a
genomics  company,  from  1997  to  September  2000  and  was  Process  Development  and  Production
Director  from  January  1995  to  June  1997.  From  January  1992  to  January  1995,  Dr.  Oliphant  held
several positions at Pioneer Hybrid International, a plant genetics company and prior to that was an
Assistant  Professor  at  the  University  of  Utah.  Dr.  Oliphant  received  his  B.A.  in  biology  from  the
University of Utah and his Ph.D. in Genetics from the Harvard Medical School.

Tristan Orpin has served as our Vice President of Worldwide Sales since December 2002. Prior to
joining  us,  Mr.  Orpin  was  the  Vice  President  of  Sales  and  Marketing  at  Sequenom,  a  genomics
company,  from  August  2001  to  November  2002  and  was  Director  of  Sales  and  Marketing  from
September  1999  to  August  2001.  From  December  1988  to  September  1999,  Mr.  Orpin  served  in
several  senior  sales  and  marketing  positions  at  Bio-Rad  Laboratories,  a  life  sciences  company.
Mr. Orpin received his BSc. in Biochemistry from the University of Melbourne.

John  R.  Stuelpnagel,  D.V.M.,  one  of  our  founders,  is  our  Senior  Vice  President  and  Chief
Operating  Officer  and  has  been  a  director  since  April  1998.  From  October  1999  to  April  2002,  he
served as our Vice President of Business Development. From April 1998 to October 1999, he served as
our acting President and Chief Executive Officer and was acting Chief Financial Officer through April
2000. While founding Illumina, Dr. Stuelpnagel was an associate with CW Group, a venture capital firm,
from  June  1997  to  September  1998  and  with  Catalyst  Partners,  a  venture  capital  firm,  from  August
1996 to June 1997. Dr. Stuelpnagel received his B.S. in Biochemistry and his Doctorate in Veterinary
Medicine from the University of California, Davis and his M.B.A. from the University of California, Los
Angeles.

Item 2. Properties.

Our  principal  research  and  development,  manufacturing  and  administrative  facilities  occupy
approximately  90,000  square  feet  of  three  buildings  located  in  San  Diego,  California,  which  we
purchased, along with eight acres of adjacent land, in January 2002. In connection with this purchase
we assumed a $26 million, 10-year mortgage on the property at a fixed interest rate of 8.36%. In June
2004, we entered into a conditional agreement to sell our land and buildings for $42.0 million and to
lease back such property for an initial term of ten years. The sale was completed in August 2004, at
which  time  the  lease  was  signed.  We  expect  that  these  facilities  will  be  sufficient  for  our  San  Diego
based operations for the foreseeable future.

In February 2003, the Company began leasing approximately 3,300 square feet of office space in
Tokyo  and  in  January  2004,  began  leasing  approximately  1,600  square  feet  of  office  space  in
Singapore. These facilities are used by local sales, marketing and field service personnel.

Item 3. Legal Proceedings.

Termination-of-Employment Lawsuit

In March 2001, a complaint seeking damages of an unspecified amount was filed against us by a
former  employee  in  the  Superior  Court  of  the  State  of  California  in  connection  with  the  employee’s
termination  of  employment  with  Illumina.  In  July  2002  a  California  Superior  Court  judgment  was
rendered against the Company and we recorded a $7.7 million charge in our financial results for the
second quarter of 2002 to cover total damages and remaining expenses. We appealed the decision,
and  in  December  2004,  the  Fourth  Appellate  District  Court  of  Appeal,  in  San  Diego,  California,
reduced the amount of the award. We recorded interest expense on the $7.7 million during the appeal
based on the statutory rate. As a result of the revised judgment, we reduced the $9.2 million liability on
our balance sheet to $5.9 million and recorded a gain of $3.3 million as a litigation judgment in the
fourth quarter of 2004.

16

Litigation with Applera Corporation’s Applied Biosystems Group

In December 2002, Applied Biosystems initiated a patent infringement suit and sought to compel
arbitration of an alleged breach of the joint development agreement. In December 2002, we filed a
suit alleging breach of contract, breach of the implied covenant of good faith and fair dealing, unfair
competition  and  other  allegations  against  Applied  Biosystems  in  San  Diego  Superior  Court,  and
moved to prevent the arbitration of our joint development agreement sought by Applied Biosystems.
In  January  2004,  we  notified  Applied  Biosystems  that  we  were  terminating  the  joint  development
agreement.

In August 2004, we and Applera entered into a settlement and cross-license agreement. Under the
terms  of  the  agreement,  we  paid  Applera  a  one-time  payment  of  $8.5  million.  The  settlement
agreement also provided for an exchange of royalty-free cross-licenses to certain intellectual property
rights, termination of the joint development agreement, dismissal of the federal patent infringement
action brought by Applied Biosystems, termination of the arbitration proceeding, and dismissal of our
state court action against Applied Biosystems.

Our financial statements included a $10.0 million advance payment from Applied Biosystems that
would have been deducted from the profits otherwise payable to us from Applied Biosystems. As a
result  of  the  settlement  agreement,  we  removed  this  $10.0  million  liability  from  our  balance  sheet,
made  a  payment  of  $8.5  million  to  Applera  and  recorded  a  gain  of  $1.5  million  as  a  litigation
settlement.

Affymetrix Litigation

In  July  2004,  Affymetrix  filed  a  complaint  in  the  U.S.  District  Court  for  the  District  of  Delaware
alleging  that  certain  of  our  products  infringe  six  Affymetrix  patents.  The  suit  seeks  an  unspecified
amount  of  monetary  damages  and  a  judgment  enjoining  the  sale  of  products,  if  any,  that  are
determined to be infringing these patents. In September 2004, we filed our answer and counterclaims
to  Affymetrix’  complaint,  seeking  declaratory  judgments  from  the  court  that  we  do  not  infringe  the
Affymetrix  patents  and  that  such  patents  are  invalid,  and  filed  counterclaims  against  Affymetrix  for
unfair competition and interference with actual and prospective economic advantage. We believe we
have meritorious defenses against each of the infringement claims alleged by Affymetrix and intend to
vigorously defend ourselves against this suit. However, we cannot be sure we will prevail in this matter.
Any unfavorable determination, and in particular, any significant cash amounts required to be paid by
us or prohibition of the sale of our products and services, could result in a material adverse effect on
our  business,  financial  condition  and  results  of  operations.  While  the  parties  have  pending  motions
before the court, no trial date has yet been set for this case.

17

Item 4. Submission of Matters to a Vote of Security Holders.

No matters were submitted to a vote of security holders during the fourth quarter of 2004.

PART II

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

Purchases of Equity Securities.

Our common stock has been quoted on the Nasdaq National Market under the symbol ‘‘ILMN’’
since July 28, 2000. Prior to that time, there was no public market for our common stock. The following
table  sets  forth,  for  the  periods  indicated,  the  quarterly  high  and  low  sales  prices  per  share  of  the
common stock as reported on the Nasdaq National Market. Our present policy is to retain earnings, if
any, to finance future growth. We have never paid cash dividends and have no present intention to pay
cash dividends in the foreseeable future.

High
First Quarter ******************************************************** $4.01
Second Quarter *****************************************************
4.25
Third Quarter *******************************************************
6.00
Fourth Quarter ******************************************************
9.00

Low

$1.71
1.75
2.72
5.09

2003

2004

High

Low

First Quarter ******************************************************* $10.24
Second Quarter ****************************************************
8.88
Third Quarter ******************************************************
7.22
Fourth Quarter *****************************************************
9.65

$6.50
6.07
4.23
6.16

At January 31, 2005, there were approximately 156 stockholders of record and the closing price
per share of our common stock, as reported on the Nasdaq National Market on such date, was $9.69.

Sales of Unregistered Securities

None.

Issuer Purchases of Equity Securities

We currently have no plans or programs to repurchase shares of our stock. However, in September
2004, we repurchased shares of unvested stock in connection with the termination of an employee as
set forth below.

Total
Number of
Shares
Purchased

Average
Price
Paid per Share

Total Number
of Shares
Purchased as
Part of
Publicly
Announced
Plans or
Programs

Maximum
Number of
Shares that
May Yet Be
Purchased Under the
Plans or
Programs

44,428

$0.28

N/A

N/A

Period

September 1 to

September 30, 2004******

18

Use of Proceeds

On July 27, 2000, we commenced our initial public offering pursuant to a Registration Statement
on Form S-1 (File No. 333-33922) resulting in net offering proceeds of $101.3 million. We will continue
to use proceeds from our initial public offering to fund operations. Through January 2, 2005, we have
used  approximately  $19.5  million  to  purchase  property,  plant  and  equipment  and  approximately
$44.4  million  to  fund  general  operating  expenses.  The  remaining  balance  is  invested  in  a  variety  of
interest-bearing  instruments  including  U.S.  Treasury  securities,  corporate  debt  securities  and  money
market accounts.

19

Item 6. Selected Financial Data.

The following selected historical consolidated financial data have been derived from our audited
consolidated  financial  statements.  The  balance  sheet  data  as  of  January  2,  2005  and  December  28,
2003  and  statements  of  operations  data  for  each  of  the  three  years  in  the  period  ended  January  2,
2005  are  derived  from  audited  consolidated  financial  statements  included  in  this  Form    10-K.  The
balance  sheet  data  as  of  December  29,  2002,  December  30,  2001  and  December  31,  2000  and
statements of operations data for each of the two years in the period ended December 30, 2001 are
derived  from  our  audited  consolidated  financial  statements  that  are  not  included  in  this  report.  You
should read this table in conjunction with Item 7, ‘‘Management’s Discussion and Analysis of Financial
Condition and Results of Operations,’’ and Item 8, ‘‘Financial Statements and Supplementary Data.’’

Statements of Operations Data

Revenue:

Product revenue*******
Service revenue *******
Research revenue *****
Total revenue *******

Costs and expenses:

Cost of product revenue
Cost of service revenue **
Research and

development *********

Selling, general and

administrative *********

Amortization of deferred
compensation and
other non-cash
compensation charges
Litigation judgment

(settlement), net*****

Total costs and

expenses *********
Loss from operations ******
Interest income ***********
Interest and other expense
Net loss... ****************

Net loss per share, basic

and diluted *************

Shares used in calculating
net loss per share, basic
and diluted *************

Year Ended
January 2,
2005

$40,497
8,075
2,011

50,583

11,572
1,687

Year Ended
December 28,
2003

Year Ended
December 30,
2001
(In thousands, except per share data)

Year Ended
December 29,
2002

Year Ended
December 31,
2000

$ 18,378
6,496
3,161

28,035

7,437
2,600

$ 4,103
3,305
2,632

10,040

1,815
1,721

$

897
99
1,490

2,486

489
68

$

42
—
1,267

1,309

—
—

21,114

22,511

26,848

20,735

13,554

25,080

18,899

9,099

5,663

4,193

844

2,454

(4,201)

756

56,096

(5,513)
941
(1,653)

54,657

(26,622)
1,821
(2,262)

4,360

8,052

51,895

(41,855)
3,805
(2,281)

5,850

6,797

—

—

32,805

(30,319)
6,198
(702)

24,544

(23,235)
4,722
(93)

$ (6,225)

$(27,063)

$(40,331)

$(24,823)

$(18,606)

$ (0.17)

$

(0.85)

$

(1.31)

$

(0.83)

$

(1.37)

35,845

31,925

30,890

29,748

13,557

20

Balance Sheet Data

January 2,
2005

December 28,
2003

December 29,
2002

December 30,
2001

December 31,
2000

(In thousands)

Cash, cash equivalents and
current restricted cash
and investments ******** $ 66,994
64,643
94,907
—
(123,712)
72,262

Working capital ***********
Total assets ***************
Long-term debt obligations
Accumulated deficit *******
Total stockholders’ equity **

$ 32,882
32,229
99,234
24,999
(117,487)
47,388

$66,294
58,522
121,906
25,620
(90,424)
71,744

$93,786
91,452
122,465
590
(50,093)
106,791

$118,719
126,260
132,793
887
(25,270)
124,100

See Note 1 of Notes to Consolidated Financial Statements for an explanation of the determination

of the number of shares used to compute basic and diluted net loss per share.

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

Operation.

The  following  discussion  and  analysis  should  be  read  with  ‘‘Selected  Financial  Data’’  and  our
consolidated  financial  statements  and  notes  thereto  included  elsewhere  in  this  Annual  Report  on
Form  10-K.  The  discussion  and  analysis  in  this  Annual  Report  on  Form  10-K  may  contain  forward-
looking  statements  that  involve  risks  and  uncertainties,  such  as  statements  of  our  plans,  objectives,
expectations  and  intentions.  The  cautionary  statements  made  in  this  Annual  Report  on  Form  10-K
should  be  read  as  applying  to  all  related  forward-looking  statements  wherever  they  appear  in  this
Annual  Report  on  Form    10-K.  Our  actual  results  could  differ  materially  from  those  discussed  here.
Factors  that  could  cause  or  contribute  to  these  differences  include  those  discussed  in  ‘‘Factors
Affecting Operating Results’’ below as well as those discussed elsewhere.

Overview

Illumina, Inc. was incorporated in April 1998. We develop and market next-generation tools for the
large-scale analysis of genetic variation and function. Understanding genetic variation and function is
critical to the development of personalized medicine, a key goal of genomics. Using our technologies,
we  have  developed  a  comprehensive  line  of  products  that  are  designed  to  provide  the  throughput,
cost effectiveness and flexibility necessary to enable researchers in the life sciences and pharmaceutical
industries  to  perform  the  billions  of  tests  necessary  to  extract  medically  valuable  information  from
advances in genomics. This information is expected to correlate genetic variation and gene function
with particular disease states, enhancing drug discovery, allowing diseases to be detected earlier and
more specifically, and permitting better choices of drugs for individual patients.

In  2001,  we  began  commercial  sale  of  short  pieces  of  DNA,  or  oligos,  manufactured  using  our
proprietary  Oligator  technology.  We  believe  our  Oligator  technology  is  more  cost  effective  than
competing technologies, which has allowed us to market our oligonucleotides under a price leadership
strategy while still achieving attractive gross margins. In 2001, we also initiated our SNP genotyping
services product line. As a result of the increasing market acceptance of our high throughput, low cost
BeadArray  technology,  we  have  entered  into  genotyping  services  contracts  with  many  leading
genotyping centers, and have been awarded $9.1 million from the National Institutes of Health to play
a major role in the first phase of the International HapMap Project.

21

Our production-scale BeadLab is based on the system we developed that has been operational in
our genotyping service product line since 2001. In addition to our Sentrix Array Matrices, it includes
the  BeadArray  Reader,  a  proprietary  scanner  that  uses  a  laser  to  read  the  results  of  experiments
captured on our arrays, as well as the GoldenGate SNP genotyping assay which can analyze up to 1536
SNPs  per  DNA  sample.  This  system  is  being  marketed  to  a  small  number  of  high  throughput
genotyping users. As of January 2, 2005, we have installed and recorded revenue for nine BeadLabs.

In 2003, we announced the launch of several new products, including 1) a new array format, the
Sentrix BeadChip, which significantly expands market opportunities for our BeadArray technology and
provides  increased  experimental  flexibility  for  life  science  researchers;  2)  a  gene  expression  product
line  on  both  the  Sentrix  Array  Matrix  and  the  Sentrix  BeadChip  that  allows  researchers  to  analyze  a
focused set of genes across eight to 96 samples on a single array; and 3) a benchtop SNP genotyping
and gene expression system, the BeadStation, for performing moderate-scale genotyping and gene
expression using our technology. The BeadStation includes our BeadArray Reader, analysis software
and assay reagents and is designed to match the throughput requirements and variable automation
needs of individual research groups and core labs. Sales of these products began in the first quarter of
2004 and, as of January 2, 2005, we have shipped 42 BeadStations.

In 2004, we announced the launch of new Sentrix BeadChips for whole-genome gene expression
and  whole-genome  genotyping.  The  whole-genome  gene  expression  BeadChips  are  designed  to
enable high-performance, cost-effective, whole-genome expression profiling of multiple samples on a
single  chip,  resulting  in  a  dramatic  reduction  in  cost  of  whole-genome  expression  analysis  while
allowing researchers to expand the scale and reproducibility of large-scale biological experimentation.
The  whole-genome  genotyping  BeadChip  can  be  scaled  to  unlimited  levels  of  multiplexing  without
compromising  data  quality  and  will  provide  scientists  the  ability  to  query  hundreds  of  thousands  of
SNPs in parallel. In 2004, we also announced two new versions of the Sentrix Array Matrix designed for
researchers who want to take advantage of our technology, but whose projects require fewer SNPs per
sample than the number utilized on our standard 1536-plex array products.

In  late  2004,  we  announced  a  strategic  collaboration  with  Invitrogen  Corporation  to  synthesize
and  distribute  oligos.  Under  the  agreement,  we  intend  to  expand  our  Oligator  DNA  synthesis
technology to include both plate and tube based capability and Invitrogen will be responsible for sales,
marketing and technical support. Profits from sales of collaboration products will be divided equally
between the two companies.

In  early  2005,  we  expanded  our  gene  expression  portfolio  by  announcing  the  launch  of  a  new
assay,  DASL,  for  generating  gene  expression  profiles  from  RNA  samples  including  those  containing
partially degraded RNAs. We also announced a standard DASL cancer panel. Prior to our DASL assay,
degraded RNA samples have been reliably assayed only with expensive, low-multiplex approaches.

In February 2005, we signed a definitive agreement and plan of merger with CyVera Corporation,
a privately-held Connecticut-based company, pursuant to which CyVera will become a wholly-owned
subsidiary of Illumina. CyVera’s digital-microbead platform is highly complementary to our portfolio of
products  and  services  and  upon  closing  of  the  transaction,  will  become  an  integral  part  of  our
BeadArray technology. The acquisition is expected to provide us with a comprehensive approach to
bead-based assays for biomarker R&D and in-vitro and molecular diagnostic opportunities, including
those that require low-complexity as well as high-complexity testing. The aggregate consideration for
the  transaction  is  $17.5  million,  consisting  of  approximately  1.5  million  shares  of  Illumina  common
stock and the payment of approximately $2.3 million of CyVera’s liabilities at the closing. The closing is
subject to customary closing conditions and is expected to occur by the end of March 2005. We expect
the first products based on CyVera’s technology to be available in the second half in 2006.

We are seeking to expand our customer base for our BeadArray technology; however, we can give

no assurance that our sales efforts will continue to be successful.

22

Our  revenues  are  subject  to  fluctuations  due  to  the  timing  of  sales  of  high-value  products  and
service  projects,  the  impact  of  seasonal  spending  patterns,  the  timing  and  amount  of  government
grant funding programs, the timing and size of research projects our customers perform, changes in
overall spending levels in the life science industry and other unpredictable factors that may affect our
customer  ordering  patterns.  Approximately  30%  of  our  revenues  for  the  year  2004  resulted  from
transactions that were funded under the International HapMap Project. We currently expect that most
of the activities under this grant involving the Company and its customers will be completed in early
2005.  We  expect  that  the  planned  commercial  launch  of  our  whole  genome  genotyping  and  gene
expression arrays, combined with the continued expansion of our existing product lines, will offset the
loss  of  revenues  funded  by  the  HapMap  grant  and  will  drive  future  revenue  growth.  However,  any
significant  delays  in  the  commercial  launch  of  these  new  products,  unfavorable  sales  trends  in  our
existing product lines, or impacts from the other factors mentioned above, could adversely affect our
revenue growth in 2005 or cause a sequential decline in quarterly revenues. Due to the possibility of
fluctuations in our revenue and net income or loss, we believe quarterly comparisons of our operating
results are not a good indication of our future performance.

We  have  incurred  substantial  operating  losses  since  our  inception.  As  of  January  2,  2005,  our
accumulated deficit was $123.7 million, and total stockholders’ equity was $72.3 million. These losses
have  principally  occurred  as  a  result  of  the  substantial  resources  required  for  the  research,  develop-
ment and manufacturing scale up effort required to commercialize our products and services, as well as
charges of $5.9 million related to a termination-of-employment lawsuit. We expect to continue to incur
substantial costs for research, development and manufacturing scale up activities over the next several
years.  We  will  also  need  to  significantly  increase  our  selling,  general  and  administrative  costs  as  we
build  up  our  sales  and  marketing  infrastructure  to  expand  and  support  the  sale  of  systems,  other
products  and  services.  As  a  result  of  the  expected  increase  in  expenses,  we  will  need  to  increase
revenue significantly to achieve profitability.

Critical Accounting Estimates

General

Our discussion and analysis of our financial condition and results of operations is based upon our
consolidated financial statements, which have been prepared in accordance with accounting principles
generally  accepted  in  the  United  States.  The  preparation  of  financial  statements  requires  that
management make estimates, assumptions and judgments with respect to the application of account-
ing  policies  that  affect  the  reported  amounts  of  assets,  liabilities,  revenues  and  expenses,  and  the
disclosures of contingent assets and liabilities. Actual results could differ from those estimates.

Our  significant  accounting  policies  are  described  in  Note  1  to  our  consolidated  financial  state-
ments. Certain accounting policies are deemed critical if 1) they require an accounting estimate to be
made  based  on  assumptions  that  were  highly  uncertain  at  the  time  the  estimate  was  made,  and  2)
changes in the estimate that are reasonably likely to occur, or different estimates that we reasonably
could have used, would have a material effect on our consolidated financial statements.

Management has discussed the development and selection of these critical accounting estimates
with  the  Audit  Committee  of  our  Board  of  Directors,  and  the  Audit  Committee  has  reviewed  the
disclosure. In addition, there are other items within our financial statements that require estimation, but
are not deemed critical as defined above.

We  believe  the  following  critical  accounting  policies  reflect  our  more  significant  estimates  and

assumptions used in the preparation of the consolidated financial statements.

23

Revenue Recognition

Our sales are primarily from two sources: product revenue and services revenue. Product revenue
consists of sales of oligonucleotides, arrays, assay reagents, genotyping systems and gene expression
systems.  Services  revenue  consists  of  revenue  received  for  performing  genotyping  services  and
extended warranty sales. As described below, significant judgments and estimates must be made and
used in connection with the revenue recognized in any accounting period.

We  recognize  revenue  in  accordance  with  the  guidelines  established  by  SEC  Staff  Accounting
Bulletin (SAB) No. 104. Under SAB 104, revenue cannot be recorded until all of the following criteria
have been met: persuasive evidence of an arrangement exists; delivery has occurred or services have
been rendered; the seller’s price to the buyer is fixed or determinable; and collectibility is reasonably
assured.

Product  delivery  generally  occurs  when  product  is  delivered  to  a  common  carrier  or  when  the
customer  receives  the  product,  depending  on  the  nature  of  the  arrangement  and  provided  no
significant obligations remain. BeadLabs are considered delivered upon shipment, installation, training
and fulfillment of contractually defined acceptance criteria and we need to determine the completion
of each of these deliverables before revenue can be recognized. Genotyping services are considered
delivered  generally  at  the  time  the  genotyping  data  is  delivered  to  the  customer.  We  have  been
awarded  $9.1  million  from  the  National  Institutes  of  Health  to  perform  genotyping  services  in
connection with the first phase of the International HapMap Project. A portion of the services related to
this project is considered delivered at the time the related  costs  are  incurred  while the remainder is
considered delivered upon the delivery of genotyping data.

In  order  to  assess  whether  the  price  is  fixed  and  determinable,  we  ensure  there  are  no  refund
rights. If payment terms are based on future performance, we defer revenue recognition until the price
becomes fixed and determinable. We assess collectibility based on a number of factors, including past
transaction history with the customer and the creditworthiness of the customer. If we determine that
collection  of  a  payment  is  not  reasonably  assured,  we  defer  revenue  recognition  until  the  time
collection  becomes  reasonably  assured,  which  is  generally  upon  receipt  of  payment.  Changes  in
judgments and estimates made in determining whether the criteria of SAB 104 have been met might
result in a change in the timing or amount of revenue recognized.

Sales of our genotyping and gene expression systems include a standard one year warranty. We
also sell separately priced maintenance (extended warranty) contracts, which are generally for one or
two  years,  upon  the  expiration  of  the  initial  warranty.  Revenue  for  extended  warranty  sales  is
recognized  ratably  over  the  term  of  the  extended  warranty.  Reserves  are  provided  for  estimated
product warranty expenses at the time the associated revenue is recognized. If we were to experience
an  increase  in  warranty  claims  or  if  costs  of  servicing  our  warrantied  products  were  greater  than  our
estimates, our gross margins could be adversely affected.

While the majority of our sales agreements contain standard terms and conditions, we do enter
into  agreements  that  contain  multiple  elements  or  non-standard  terms  and  conditions.  Emerging
Issues  Task  Force  No.  00-21  (‘‘EITF  00-21’’),  ‘‘Revenue  Arrangements  with  Multiple  Deliverables’’,
provides  guidance  on  accounting  for  arrangements  that  involve  the  delivery  or  performance  of
multiple products, services, or rights to use assets within contractually binding arrangements. Signifi-
cant contract interpretation is sometimes required to determine the appropriate accounting, including
whether the deliverables specified in a multiple element arrangement should be treated as separate
units  of  accounting  for  revenue  recognition  purposes,  and  if  so,  how  the  price  should  be  allocated
among the deliverable elements, when to recognize revenue for each element, and the period over
which  revenue  should  be  recognized.  We  recognize  revenue  for  delivered  elements  only  when  we
believe  the  fair  values  of  undelivered  elements  are  known  and  there  are  no  uncertainties  regarding
customer acceptance.

24

A  third  source  of  revenue,  research  revenue,  consists  of  amounts  earned  under  research  agree-
ments with government grants, which is recognized in the period during which the related costs are
incurred. All revenues are recorded net of any applicable allowances for returns or discounts.

Allowance for Doubtful Accounts

We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of
our  customers  to  make  required  payments.  We  evaluate  the  collectibility  of  our  accounts  receivable
based on a combination of factors. We regularly analyze customer accounts, review the length of time
receivables are outstanding and review historical loss rates. If the financial condition of our customers
were to deteriorate, additional allowances could be required.

Inventory Valuation

We record adjustments to inventory for potentially excess, obsolete or impaired goods in order to
state  inventory  at  net  realizable  value.  We  must  make  assumptions  about  future  demand,  market
conditions and the release of new products that will supercede old ones. We regularly review inventory
for  excess  and  obsolete  products  and  components,  taking  into  account  product  life  cycle  and
development  plans,  product  expiration  and  quality  issues,  historical  experience  and  our  current
inventory  levels.  If  actual  market  conditions  are  less  favorable  than  anticipated,  additional  inventory
adjustments could be required.

Contingencies

We are subject to legal proceedings primarily related to intellectual property matters. Based on
the information available at the balance sheet dates and through consultation with our legal counsel,
we  assess  the  likelihood  of  any  adverse  judgments  or  outcomes  of  these  matters,  as  well  as  the
potential ranges of probable losses. If losses are probable and reasonably estimable, we will record a
reserve  in  accordance  with  Statement  of  Financial  Accounting  Standards  No.  5,  ‘‘Accounting  for
Contingencies’’. Currently we have no such reserves recorded. Any reserves recorded in the future may
change due to new developments in each matter.

Recently Issued Accounting Standards

In  December  2004,  the  Financial  Accounting  Standards  Board  (FASB)  issued  FASB  Statement
No.  123  (revised  2004),  Share  Based  Payment  (SFAS  123R),  which  is  a  revision  of  FASB  Statement
No.  123,  Accounting  for  Stock-Based  Compensation  (SFAS  123).  This  statement  supercedes  APB
Opinion 25, Accounting for Stock Issued to Employees (APB 25), and amends FASB Statement No. 95,
Statement of Cash Flows. Generally, the approach in SFAS 123R is similar to the approach described
in SFAS 123; however, SFAS 123R requires all share-based payments to employees, including grants of
employee  stock  options,  to  be  recognized  in  the  income  statement  based  on  their  fair  values.  Pro
forma disclosure is no longer an alternative. We currently utilize the Black-Scholes model to measure
the fair value of stock options granted to employees under the pro forma disclosure requirements of
FAS 123. While SFAS 123R permits companies to continue to use such model, it also permits the use of
a ‘‘lattice’’ model. We have not yet determined which model we will use to measure the fair value of
employee stock options under the adoption for SFAS 123R. The new standard is effective for periods
beginning after June 15, 2005, and we expect to adopt SFAS 123R on July 4, 2005.

25

We  currently  account  for  share-based  payments  to  employees  using  APB  25’s  intrinsic  value
method  and,  as  such,  recognize  no  compensation  cost  for  employee  stock  options  granted  with
exercise prices equal to or greater than the fair value of our common stock on the date of the grant.
Accordingly, the adoption of SFAS 123R’s fair value method is expected to result in significant non-
cash charges which will increase our reported operating expenses; however, it will have no impact on
our cash flows. The impact of adoption of SFAS 123R cannot be predicted at this time because it will
depend on the level of share-based payments granted in the future and the model we choose to use.
However,  had  we  adopted  SFAS  123R  in  prior  periods,  the  impact  of  that  standard  would  have
approximated the impact of SFAS 123 as described in the disclosure of pro forma net loss under Stock-
Based Compensation in Note 1 to our consolidated financial statements.

Results of Operations

To  enhance  comparability,  the  following  table  sets  forth  audited  Consolidated  Statements  of
Operations  data  for  the  years  ended  January  2,  2005,  December  28,  2003  and  December  29,
2002 stated as a percentage of total revenue.

Year Ended
January 2,
2005

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Revenue *************************************
Product revenue ****************************
Service revenue ****************************
Research revenue ***************************
Total revenue*****************************

Costs and expenses:

Cost of product revenue*********************
Cost of service revenue *********************
Research and development ******************
Selling, general and administrative ***********
Amortization of deferred compensation and

other non-cash compensation charges ******
Litigation judgment (settlement), net**********
Total costs and expenses ******************
Loss from operations **************************
Interest income *******************************
Interest and other expense ********************
Net loss *************************************

80%
16
4

66%
23
11

100

100

23
3
41
50

2
(8)

111

(11)
2
(3)

27
9
80
67

9
3

195

(95)
6
(8)

41%
33
26

100

18
17
267
91

44
80

517

(417)
38
(23)

(12)%

(97)%

(402)%

Comparison of Years Ended January 2, 2005 and December 28, 2003

Our fiscal year is 52 or 53 weeks ending the Sunday closest to December 31, with quarters of 13 or
14  weeks  ending  the  Sunday  closest  to  March  31,  June  30,  and  September  30.  The  years  ended
January 2, 2005 and December 28, 2003 are 53 and 52 weeks, respectively.

26

Revenue

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Product revenue ***********************************
Service revenue ***********************************
Research revenue **********************************
Total revenue************************************

$40,497
8,075
2,011

$50,583

$18,378
6,496
3,161

$28,035

Change

120%
24
(36)

80%

Revenue  for  the  years  ended  January  2,  2005  and  December  28,  2003  was  $50.6  million  and
$28.0 million,  respectively. Product revenue  increased  to $40.5 million  in 2004  from $18.4  million in
2003.  The  increase  resulted  almost  entirely  from  sales  of  consumables  used  on  our  BeadLabs  and
BeadStations  and  sales  of  our  benchtop  BeadStations,  offset  by  fewer  sales  of  our  production-scale
BeadLabs. In 2003, we had no sales of BeadStations and we only began selling consumable products
in May 2003.

Service revenue increased to $8.1 million in 2004 from $6.5 million in 2003. Substantially all of this
increase relates to SNP genotyping services performed for the International HapMap Project. We are
the  recipient  of  a  grant  from  the  National  Institutes  of  Health  covering  our  participation  in  the  first
phase  of  the  International  HapMap  Project,  which  is  a  $100  million  internationally  funded  successor
project to the Human Genome Project that will help identify a map of genetic variations that may be
used  to  perform  disease-related  research.  We  could  receive  up  to  $9.1  million  of  funding  for  this
project which covers basic research activities, the development of SNP assays and the genotyping to
be performed on those assays. We have recognized revenue under this grant of $8.4 million and, as of
the end of 2004, we had approximately $0.7 million of funding remaining related to this project which
is expected to be received in early 2005.

Government  grants  and  other  research  funding  decreased  to  $2.0  million  for  the  year  ended
January 2, 2005 from $3.2 million for the year ended December  28, 2003 primarily due to a decrease
in  internal  research  spending  for  our  grant  from  the  National  Institutes  of  Health  covering  our
participation  in  the  International  HapMap  Project.  We  expect  government  grants  to  decline  as  a
percentage of total revenues.

To  expand  revenue  in  the  future,  we  have  recently  launched  a  series  of  new  products  that  we
expect  to  begin  selling  in  2005.  These  include  a  new  assay,  DASL,  for  generating  gene  expression
profiles  from  RNA  samples  including  those  containing  partially  degraded  RNAs,  two  multi-sample
whole  genome  gene  expression  BeadChips  and  a  whole  genome  genotyping  BeadChip.  Our
BeadLabs address a limited number of potential high throughput genotyping customers, and sales of
these systems may decline in 2005 versus 2004. In addition, approximately 30% of our revenues for the
year  2004  resulted  from  transactions  that  were  funded  under  the  International  HapMap  Project.  We
expect that most of the activities under this grant involving us and our customers will be completed in
early  2005  and  that  revenue  related  to  this  project  will  decline  in  2005  versus  2004.  We  expect  the
sales  of  the  new  products  mentioned  above,  combined  with  increased  sales  of  BeadStations  and
revenue  generated  from  our  collaboration  with  Invitrogen,  to  offset  such  declines  and  for  overall
revenues to increase above 2004 levels; however, we cannot assure you that we will be successful in
these sales efforts.

27

Cost of Product and Service Revenue

Cost of product revenue****************************
Cost of service revenue ****************************

$11,572
$ 1,687

$7,437
$2,600

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Change

56%
(35)%

Cost  of  product  and  service  revenue  represents  manufacturing  costs  incurred  in  the  production
process, including component materials, assembly labor and overhead, packaging and delivery cost.
Costs related to research revenue is included in research and development expense.

Cost  of  product  revenue  increased  to  $11.6  million  for  the  year  ended  January  2,  2005  from
$7.4 million for the year ended December 28, 2003. Substantially all of this increase was driven by the
sales of our BeadStations and consumables. Gross margin on product revenue increased to 71% in the
year  ended  January  2,  2005,  from  60%  for  the  year  ended  December  28,  2003,  due  primarily  to
increased  sales  of  higher  margin  consumable  products,  as  well  as  efficiencies  gained  in  oligo
manufacturing.

Cost  of  service  revenue  decreased  to  $1.7  million  for  the  year  ended  January  2,  2005  from
$2.6 million for the year ended December 28, 2003 and gross margin on service revenue increased to
79%  in  the  year  ended  January  2,  2005,  from  60%  for  the  year  ended  December  28,  2003.  This
decrease in cost and increase in gross margin is due primarily to efficiencies gained in SNP genotyping
services, as well as lower costs of oligos used in the genotyping services process.

We expect product mix will continue to affect our future gross margins, and any increase in the
proportion  of  consumable  sales  to  total  sales  will  continue  to  favorably  affect  our  gross  margins.
However, we expect our market will become increasingly price competitive, and over the longer term,
our margins may decline.

Research and Development Expenses

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Change

Research and development *************************

$21,114

$22,511

(6)%

Our research and development expenses consist primarily of salaries and other personnel-related
expenses,  laboratory  supplies  and  other  expenses  related  to  the  design,  development,  testing  and
enhancement  of  our  products.  We  expense  our  research  and  development  expenses  as  they  are
incurred.  Research  and  development  expenses  decreased  $1.4  million  to  $21.1  million  for  the  year
ended  January  2,  2005  from  $22.5  million  for  the  year  ended  December    28,  2003.  Approximately
$0.9 million of the decrease is attributable to personnel related expenses and related lab supplies and
the  majority  of  the  remaining  $0.5  million  is  attributable  to  lower  manufacturing-related  resources
needed to support research efforts and a decrease in depreciation expense.

During  the  year  ended  January  2,  2005,  the  cost  of  BeadArray  technology  research  activities
decreased $0.4 million as compared to the year ended December 28, 2003. The decrease is primarily
the result of completing the development of several products that were commercially launched in late
2003 and 2004 such as our BeadStation and focused gene set array products.

Research to support our Oligator technology platform decreased $1.0 million in the year ended
January 2, 2005 as compared to the year ended December 28, 2003. In the second quarter of 2003,
we implemented additional Oligator manufacturing and software enhancements to expand capacity,
increase throughput, and further reduce operating costs. In addition, as we increase our product sales,
a smaller portion of our manufacturing resources are now used to support research efforts as compared
to the same periods in 2003.

28

We expect that our research and development expenses will increase in the near term due to the
allocation  to  research  and  development  of  rent  expense  from  the  new  lease  on  our  building  and
increased spending levels for new product development. In addition, we expect an increase in research
and development expenses in connection with our proposed acquisition of CyVera Corporation, which
is expected to close in March 2005.

Stock based compensation related to research and development employees and consultants was
$0.3  million  for  the  year  ended  January  2,  2005  as  compared  to  $1.3  million  for  the  year  ended
December 28, 2003.

Selling, General and Administrative Expenses

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Change

Selling, general and administrative ******************

$25,080

$18,899

33%

Our selling, general and administrative expenses consist primarily of personnel costs for sales and
marketing,  finance,  human  resources,  business  development  and  general  management,  as  well  as
professional fees, such as expenses for legal and accounting services. Selling, general and administra-
tive  expenses  increased  $6.2  million  to  $25.1  million  for  the  year  ended  January  2,  2005  from
$18.9 million for the year ended December 28, 2003. Approximately $5.2 million of the increase is due
to higher sales and marketing costs, of which $4.1 million is attributable to personnel related expenses
and $0.7 million is attributable to an increase in facility related expenses. Approximately $1.0 million of
the  increase  in  selling,  general  and  administrative  expenses  is  related  to  general  and  administrative
costs, of which $0.4 million is related to personnel related expenses, and the majority of the remaining
$0.6 million is attributable to expenses associated with Sarbanes-Oxley compliance and our interna-
tional expansion. We expect that our selling, general and administrative expenses will accelerate as we
expand  our  staff,  add  sales  and  marketing  infrastructure,  incur  additional  costs  to  support  the
commercialization  and  support  of  an  increasing  number  of  products,  and  due  to  the  allocation  to
selling, general and administrative of rent expense from the new lease on our building.

Stock based compensation related to selling, general and administrative employees, directors and
consultants was $0.5 million for the year ended January 2, 2005 as compared to $1.2 million for the
year ended December 28, 2003.

Amortization of Deferred Compensation and Other Stock-Based Compensation Charges

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Change

Amortization of deferred compensation and other

stock-based compensation charges ****************

$844

$2,454

(66)%

From our inception through July 27, 2000, in connection with the grant of certain stock options
and sales of restricted stock to employees, founders and directors, we have recorded deferred stock
compensation  totaling  $17.6  million,  representing  the  difference  between  the  exercise  or  purchase
price and the fair value of our common stock as estimated for financial reporting purposes on the date
such  stock  options  were  granted  or  such  restricted  stock  was  sold.  We  recorded  this  amount  as  a
component  of  stockholders’  equity  and  amortize  the  amount  as  a  charge  to  operations  over  the
vesting period of the restricted stock and options.

29

We  recognize  compensation  expense  over  the  vesting  period  for  employees,  founders  and
directors,  using  an  accelerated  amortization  methodology  in  accordance  with  Financial  Accounting
Standards Board Interpretation No. 28. For consultants, deferred compensation is recorded at the fair
value  for  the  options  granted  or  stock  sold  in  accordance  with  Statement  of  Financial  Accounting
Standards No. 123 and is periodically re-measured and expensed in accordance with Emerging Issues
Task Force No. 96-18.

We recorded amortization of deferred compensation of $0.8 million and $2.5 million for the years
ended  January  2,  2005  and  December  28,  2003,  respectively.  We  expect  expenses  related  to  stock
based compensation to increase significantly beginning in the third quarter of 2005 as we implement
the requirements of SFAS 123R. Although the adoption of SFAS 123R’s fair value method is expected
to result in a significant increase in our reported operating expenses, it will have no impact on our cash
flows. SFAS 123R is discussed further in ‘‘Recently Issued Accounting Standards’’ above and Note 1 to
our consolidated financial statements.

Litigation Judgment (Settlement), net

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Change

Litigation judgment (settlement), net*****************

$(4,201)

$756

(656)%

A $7.7 million charge was recorded in June 2002 to cover total damages and estimated expenses
related  to  a  jury  verdict  in  a  termination-of-employment  lawsuit.  We  appealed  the  decision,  and  in
December 2004, the Fourth Appellate District Court of Appeal, in San Diego, California, reduced the
amount of the award. During the appeal process, the court required us to incur interest charges on the
judgment amount at statutory rates until the case was resolved. For the years ended January 2, 2005
and December 28, 2003 we recorded $0.6 million and $0.8 million, respectively, as litigation expense
for such interest charges. As a result of the revised judgment, we reduced the $9.2 million liability on
our balance sheet to $5.9 million and recorded a gain of $3.3 million as a litigation judgment in the
fourth quarter of 2004.

In  1999,  we  entered  into  a  joint  development  agreement  with  Applied  Biosystems  Group,  an
operating group of Applera Corporation, under which the companies agreed to jointly develop a SNP
genotyping  system  that  would  combine  our  BeadArray  technology  with  Applied  Biosystems’  assay
chemistry and scanner technology. In conjunction with the agreement, Applied Biosystems agreed to
provide us with non-refundable research and development support of $10.0 million, all of which was
provided  by  December  2001.  As  of  December  28,  2003,  this  amount  was  recorded  on  our  balance
sheet  as  an  advance  payment  from  a  former  collaborator.  In  December  2002,  Applied  Biosystems
initiated a patent infringement suit and sought to compel arbitration of an alleged breach of the joint
development agreement. We initiated a suit in state court seeking to enjoin the arbitration and alleged
that Applied Biosystems had breached the joint development agreement. In August 2004, we entered
into a settlement and cross-license agreement with Applera. As a result of the settlement, we removed
the  $10.0  million  liability  from  our  balance  sheet,  made  a  payment  of  $8.5  million  to  Applera  and
recorded a gain of $1.5 million as a litigation settlement.

Interest Income

Interest income ************************************

$941

$1,821

(48%)

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Change

30

Interest  income  on  our  cash  and  cash  equivalents  and  investments  was  $0.9  million  and
$1.8 million for the years ended January 2, 2005 and December 28, 2003, respectively. The decrease is
due to lower effective interest rates, partially offset by higher average cash balances.

Interest and Other Expense

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Change

Interest and other expense *************************

$1,653

$2,262

(27%)

Interest  and  other  expense  primarily  consists  of  interest  expense,  which  was  $1.4  million  and
$2.2  million  for  the  years  ended  January  2,  2005  and  December  28,  2003,  respectively.  Interest
expense  relates  primarily  to  a  $26.0  million  fixed  rate  loan  which  was  paid  off  in  August  2004  in
connection with the sale of our San Diego facilities.

In the year ended January 2, 2005, we recorded approximately $150,000 in losses due to foreign
currency transactions as compared to approximately $5,000 in gains, for the year ended December 28,
2003. Estimated foreign income taxes were approximately $135,000 and $45,000 for the years ended
January 2, 2005 and December 28, 2003, respectively.

Provision for Income Taxes

We incurred net operating losses for the years ended January 2, 2005 and December 28, 2003,
and accordingly, we did not pay any U.S. federal or state income taxes. We have recorded a valuation
allowance for the full amount of the resulting net deferred tax asset, as the future realization of the tax
benefit  is  uncertain.  As  of  January  2,  2005,  we  had  net  operating  loss  carryforwards  for  federal  and
state  tax  purposes  of  approximately  $86.5  million  and  $39.1  million,  respectively,  which  begin  to
expire in 2018, unless previously utilized.

We  also  had  U.S.  federal  and  state  research  and  development  tax  credit  carryforwards  of
approximately  $3.1  million  and  $3.0  million,  respectively,  which  begin  to  expire  in  2018,  unless
previously utilized.

Our  utilization  of  the  net  operating  losses  and  credits  may  be  subject  to  substantial  annual
limitations pursuant to Section 382 and 383 of the Internal Revenue Code, and similar state provisions,
as a result of changes in our ownership structure. These annual limitations may result in the expiration
of net operating losses and credits prior to utilization.

Comparison of Years Ended December 28, 2003 and December 29, 2002

Revenue

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Change

(In thousands)

Product revenue *********************************
Service revenue *********************************
Research revenue ********************************
Total revenue *********************************

$18,378
6,496
3,161

$28,035

$ 4,103
3,305
2,632

$10,040

348%
97
20

179%

31

Revenue for the years ended December 28, 2003 and December 29, 2002 was $28.0 million and
$10.0  million,  respectively.  Product  revenue  increased  to  $18.4  million  in  2003  from  $4.1  million  in
2002. The increase resulted almost entirely from the first sales of our BeadLab, with six systems sold in
the year ended December 28, 2003, along with sales of consumables that are used on these systems.
Prior to 2003 we had no sales of BeadLabs or consumable products. SNP genotyping service revenue
increased to $6.5 million in 2003 from $3.3 million in 2002. Substantially all of this increase relates to
genotyping  services  performed  for  the  International  HapMap  Project,  which  commenced  in  2003.
Government grants and other research funding increased to $3.2 million for the year ended Decem-
ber  28,  2003  from  $2.6  million  for  the  year  ended  December  29,  2002  due  to  an  increase  in  the
number of grants received.

Cost of Product and Service Revenue

Cost of product revenue *************************
Cost of service revenue **************************

$7,437
$2,600

$1,815
$1,721

Year Ended
December 28,
2003

Year Ended
December 29,
2002

(In thousands)

Change

310%
51%

Cost  of  product  revenue  increased  to  $7.4  million  the  year  ended  December    28,  2003  from
$1.8 million for the year ended December 29, 2002. Substantially all of this increase was driven by the
sales  of  our  BeadLabs  and  consumables,  of  which  we  had  none  in  2002.  Gross  margin  on  product
revenue  increased  to  60%  in  the  year  ended  December  28,  2003,  from  56%  for  the  year  ended
December  29, 2002. This increase is due primarily to increased sales of higher margin products such as
array matrices and assay reagents.

Cost  of  service  revenue  increased  to  $2.6  million  the  year  ended  December    28,  2003  from
$1.7 million for the year ended December 29, 2002. Substantially all of this increase was driven by the
higher level of SNP genotyping service revenue in 2003 as compared to 2002. Gross margin on service
revenue  increased  to  60%  in  the  year  ended  December  28,  2003,  from  48%  for  the  year  ended
December 29, 2002 due primarily to efficiencies gained in SNP genotyping services.

Research and Development

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Change

(In thousands)

Research and development ***********************

$22,511

$26,848

(16%)

Research and development expenses decreased $4.3 million to $22.5 million for the year ended

December 28, 2003 from $26.8 million for the year ended December 29, 2002.

During the year ended December 28, 2003, the cost of BeadArray technology research activities
decreased $3.8 million as compared to the year ended December 29, 2002. The decrease occurred
primarily as a result of completing the development of new products launched in 2003. In addition, as
we completed development efforts and increased our array-driven product sales, a smaller portion of
our manufacturing resources was charged to research and development expense in 2003 than in 2002.

Research to support our Oligator technology platform decreased $0.5 million in the year ended
December 28, 2003 as compared to the year ended December 29, 2002. This decline is primarily due
to  higher  development  expenses  incurred  in  the  first  quarter  of  2002  for  a  major  upgrade  of  our
Oligator technology, which resulted in a significant increase in our manufacturing capacity.

Stock based compensation related to research and development employees and consultants was
$1.3 million for the year ended December 28, 2003 as compared to $2.4 million for the year ended
December 29, 2002.

32

Selling, General and Administrative Expenses

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Change

(In thousands)

Selling, general and administrative ****************

$18,899

$9,099

108%

Selling, general and administrative expenses increased $9.8 million to $18.9 million for the year
ended December 28, 2003 from $9.1 million for the year ended December 29, 2002. Approximately
$4.4  million  of  this  increase  is  related  to  higher  legal  expenses,  which  is  primarily  due  to  legal
proceedings  regarding  the  disputes  with  Applied  Biosystems.  Approximately  $4.1  million  of  the
increase is due to higher sales and marketing costs, of which $3.0 million is attributable to personnel
related expenses while the majority of the remaining $1.1 million is attributable to an increase in facility
related  expenses.  During  2003,  we  significantly  expanded  our  sales  and  marketing  resources  to
support the direct sale of our new products, including establishing additional sales operations in Japan
and Singapore.

Stock based compensation related to selling, general and administrative employees, directors and
consultants was $1.2 million for the year ended December 28, 2003 as compared to $2.0 million for the
year ended December 29, 2002.

Amortization of Deferred Compensation and Other Stock-Based Compensation Charges

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Change

(In thousands)

Amortization of deferred compensation and other

stock-based compensation charges **************

$2,454

$4,360

(44%)

In connection with the grant of stock options and sale of restricted common stock to employees,
founders and directors through July 27, 2000, we recorded deferred compensation of approximately
$17.6 million. We recorded amortization of this deferred compensation of $2.5 million and $4.4 million
for the years ended December 28, 2003 and December 29, 2002, respectively.

Litigation Judgment (Settlement), net

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Change

(In thousands)

Litigation judgment (settlement), net***************

$756

$8,052

(91%)

A $7.7 million charge was recorded in June 2002 to cover total damages and estimated expenses
related  to  a  jury  verdict  in  a  termination-of-employment  lawsuit.  We  appealed  the  decision,  and  in
December 2004, the Fourth Appellate District Court of Appeal, in San Diego, California, reduced the
amount of the award. During the appeal process, the court required us to incur interest charges on the
judgment  amount  at  statutory  rates  until  the  case  was  resolved.  For  the  years  ended  December  28,
2003  and  December  29,  2002,  we  recorded  $0.8  million  and  $0.4  million,  respectively,  as  litigation
expense for such interest charges.

Interest Income

Interest income**********************************

$1,821

$3,805

(52%)

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Change

(In thousands)

33

Interest  income  on  our  cash  and  cash  equivalents  and  investments  was  $1.8  million  and
$3.8  million  for  the  years  ended  December  28,  2003  and  December  29,  2002,  respectively.  The
decrease is due to lower average levels of invested funds and lower effective interest rates.

Interest and Other Expense

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Change

(In thousands)

Interest and other expense ***********************

$2,262

$2,281

(1%)

Interest expense was $2.2 million and $2.3 million for the years ended December 28, 2003 and
December 29, 2002, respectively. Interest expense relates primarily to a $26.0 million fixed rate loan
related to the purchase of our new facility during the first quarter of 2002.

Liquidity and Capital Resources

Cashflow

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Year Ended
December 29,
2002

Net cash used in operating activities************
Net cash provided by (used in) investing activities
Net cash provided by financing activities ********
Effect of foreign currency translation ************

$(19,574)
57,022
4,875
1

$(18,256)
28,468
216
—

$(25,593)
(2,641)
26,106
—

Net increase (decrease) in cash and cash

equivalents*********************************

$ 42,324

$ 10,428

$ (2,128)

As of January 2, 2005, we had cash, cash equivalents and investments (including restricted cash
and  investments  of  $12.2  million)  of  approximately  $67.0  million.  We  currently  invest  our  funds  in
U.S.  dollar  based  investment-grade  corporate  and  government  debt  securities,  with  strong  credit
ratings or short maturity mutual funds providing similar financial returns.

Our  operating  activities  used  cash  of  $19.6  million  in  the  year  ended  January  2,  2005,  as
compared to $18.3 million in the year ended December 28, 2003. Net cash used in operating activities
in the year ended January 2, 2005 was primarily the result of a net loss from operations of $6.2 million,
the payment of an $8.5 million legal settlement, as described under ‘‘Litigation Judgment (Settlement),
net’’ above, a $7.2 million increase in accounts receivable due to increased sales and a $2.0 million
increase in other assets primarily for the security deposit for the building lease, reduced by non-cash
charges of $4.0 million for depreciation and amortization. Net cash used in operating activities in the
year ended December 28, 2003 was primarily the result of a net loss from operations of $27.1 million
reduced by non-cash charges of $4.5 million for depreciation and amortization and non-cash charges
of $2.5 million for amortization of deferred stock compensation.

Our  investing  activities  provided  cash  of  $57.0  million  in  the  year  ended  January  2,  2005  as
compared to $28.5 million in the year ended December 28, 2003. Cash provided in investing activities
in the year ended January 2, 2005 was due to $40.7 million in proceeds from the sale of our land and
buildings,  net  of  fees,  and  $19.8  million  from  the  sale  or  maturity  of  investment  securities,  net  of
purchases  of  investment  securities  used  to  provide  operating  funds  for  our  business,  reduced  by
$3.4 million for the purchase of property and equipment. Cash provided in investing activities in the
year  ended  December    28,  2003  was  due  primarily  to  $30.5  million  from  the  sale  or  maturity  of
investment securities, net of purchases of investment securities used to provide operating funds for our
business, reduced by $2.0 million for the purchase of property and equipment.

34

Our financing activities provided $4.9 million in the year ended January  2, 2005 as compared to
$0.2 million in the year ended December 28, 2003. Cash provided in financing activities in the year
ended January 2, 2005 was due primarily to proceeds from the issuance of common stock, including
$28.7 million of net proceeds from the sale of approximately 4.6 million shares of our common stock in
May 2004, offset by the $25.2 million in long term debt we paid off in connection with the sale of our
land  and  buildings.  Cash  provided  in  financing  activities  in  the  year  ended  December  28,  2003  was
primarily due to proceeds from the issuance of common stock reduced by payments on long-term debt
and equipment financings.

In June 2002, we recorded a $7.7 million charge to cover total damages and estimated expenses
related  to  a  termination-of-employment  lawsuit.  As  a  result  of  our  decision  to  appeal  the  ruling,  we
filed a surety bond with the court in October 2002 of 1.5 times the judgment amount, or approximately
$11.3 million. Under the terms of the bond, we were required to maintain a letter of credit for 90% of
the bond amount to secure the bond. Further, we were required to deposit approximately $12.5 mil-
lion  of  marketable  securities  as  collateral  for  the  letter  of  credit  and  accordingly,  these  funds  were
restricted  from  use  for  corporate  purposes.  A  judgment  was  rendered  in  December  2004  and  a
$5.9 million payment was made in early 2005 at which time the restricted funds were released.

As  of  January  2,  2005,  we  had  funding  remaining  under  existing  NIH  grants  of  approximately
$1.5  million,  including  $0.7  million  available  under  the  International  HapMap  Project.  All  of  these
amounts are expected to be paid in 2005, subject to the actual amount of activities we perform under
these grants.

Based  on  our  current  operating  plans,  we  expect  that  our  current  cash  and  cash  equivalents,
investments,  revenues  from  sales  and  funding  from  grants  will  be  sufficient  to  fund  our  anticipated
operating  needs  for  at  least  24  months.  Operating  needs  include  the  planned  costs  to  operate  our
business including amounts required to fund working capital and capital expenditures. At the current
time,  we  have  no  material  commitments  for  capital  expenditures.  However,  our  future  capital
requirements  and  the  adequacy  of  our  available  funds  will  depend  on  many  factors,  including  our
ability to successfully commercialize our SNP genotyping and gene expression systems and extensions
to  those  products  and  to  expand  our  oligonucleotide  and  SNP  genotyping  services  product  lines,
scientific  progress  in  our  research  and  development  programs,  the  magnitude  of  those  programs,
competing technological and market developments, the successful resolution of our legal proceedings
with Affymetrix, the success of our collaboration with Invitrogen and the need to enter into collabora-
tions with other companies or acquire other companies or technologies to enhance or complement our
product and service offerings. Therefore, we may require additional funding within this 24 month time
frame.  In  addition,  we  may  choose  to  raise  additional  capital  due  to  market  conditions  or  strategic
considerations, such as an acquisition, even if we believe we have sufficient funds for our current or
future  operating  plans.  Further,  any  additional  equity  financing  may  be  dilutive  to  our  then  existing
stockholders and may adversely affect their rights.

In  December,  2003,  we  filed  a  shelf  registration  statement  that  would  allow  us  to  raise  up  to
$65 million of funding through the sale of common stock in one or more transactions. In May 2004, we
raised approximately $28.7 million, net of offering expenses, through the sale of our common stock
under this shelf registration statement. We currently do not have plans to raise additional funds under
this registration statement.

Off-Balance Sheet Arrangements and Contractual Obligations

We do not participate in any transactions that generate relationships with unconsolidated entities
or  financial  partnerships,  such  as  entities  often  referred  to  as  structured  finance  or  special  purpose
entities (‘‘SPEs’’), which would have been established for the purpose of facilitating off-balance sheet
arrangements  or  other  contractually  narrow  or  limited  purposes.  As  of  January    2,  2005,  we  are  not
involved in any SPE transactions.

35

In  January  2002,  we  purchased  two  newly  constructed  buildings  and  assumed  a  $26.0  million,
10-year mortgage on the property at a fixed interest rate of 8.36%. In June 2004, we entered into a
conditional agreement to sell our land and buildings for $42.0 million and to lease back such property
for an initial term of ten years. The sale was completed in August 2004 at which time the lease was
signed.  After  the  repayment  of  the  remaining  $25.2  million  debt  and  other  related  transaction
expenses, we received $15.5 million in net cash proceeds. We removed the land and net book value of
the buildings of $36.9 million from our balance sheet and are recording the resulting $3.7 million gain
on the sale of the property over the ten year lease term in accordance with SFAS 13, Accounting for
Leases. Under the terms of the lease, we made a $1.9 million security deposit and are paying monthly
rent of $318,643 for the first year with an annual increase of 3% in each subsequent year.

We  also  lease  office  space  under  non-cancelable  operating  leases  that  expire  at  various  times

through January 2007. These leases contain renewal options ranging from 2 to 3 years.

As  of  January  2,  2005,  our  enforceable  and  legally  binding  contractual  obligations  are  (in

thousands):

Contractual Obligation
Operating leases ************* $43,225
Total************************* $43,225

Total

Payments Due by Period

Less Than
1 Year

$4,251

$4,251

1 – 3 Years

3 – 5 Years

$8,502

$8,502

$8,576

$8,576

More Than
5 Years

$21,896

$21,896

The above table does not include orders for goods and services entered into in the normal course

of business that are not enforceable or legally binding.

Factors Affecting Our Operating Results

Our business is subject to various risks, including those described below. In addition to the other
information included in this Form 10-K, the following issues could adversely affect our operating results
or our stock price.

36

Litigation or other proceedings or third party claims of intellectual property infringement
could require us to spend significant time and money and could prevent us from selling our
products or services.

Our  commercial  success  depends  in  part  on  our  non-infringement  of  the  patents  or  proprietary
rights of third parties and the ability to protect our own intellectual property. While we recently settled
our litigation with Applera Corporation’s Applied Biosystems Group in August 2004, Affymetrix filed a
complaint against us in July 2004, alleging infringement of six of its patents, and other third parties
have or may assert that we are employing their proprietary technology without authorization. As we
enter  new  markets,  we  expect  that  competitors  will  likely  assert  that  our  products  infringe  their
intellectual  property  rights  as  part  of  a  business  strategy  to  impede  our  successful  entry  into  those
markets. In addition, third parties have or may obtain patents in the future and claim that use of our
technologies infringes these patents. We could incur substantial costs and divert the attention of our
management  and  technical  personnel  in  defending  ourselves  against  any  of  these  claims.  We  may
incur  the  same  costs  and  diversions  in  enforcing  our  patents  against  others.  Furthermore,  parties
making claims against us may be able to obtain injunctive or other relief, which effectively could block
our  ability  to  further  develop,  commercialize  and  sell  products,  and  could  result  in  the  award  of
substantial damages against us. In the event of a successful claim of infringement against us, we may
be required to pay damages and obtain one or more licenses from third parties, or be prohibited from
selling certain products. We may not be able to obtain these licenses at a reasonable cost, or at all. In
that  event,  we  could  encounter  delays  in  product  introductions  while  we  attempt  to  develop
alternative methods or products. Defense of any lawsuit or failure to obtain any of these licenses could
prevent us from commercializing available products, and the prohibition of sale of any of our products
could materially affect our ability to grow and to attain profitability.

We expect intense competition in our target markets, which could render our products
obsolete, result in significant price reductions or substantially limit the volume of products
that we sell. This would limit our ability to compete and achieve profitability. If we cannot
continuously develop and commercialize new products, our revenues may not grow as
intended.

We  compete  with  life  sciences  companies  that  design,  manufacture  and  market  instruments  for
analysis  of  genetic  variation  and  function  and  other  applications  using  technologies  such  as  two-
dimensional  electrophoresis,  capillary  electrophoresis,  mass  spectrometry,  flow  cytometry,
microfluidics, and mechanically deposited, inkjet and photolithographic arrays. We anticipate that we
will face increased competition in the future as existing companies develop new or improved products
and  as  new  companies  enter  the  market  with  new  technologies.  The  markets  for  our  products  are
characterized  by  rapidly  changing  technology,  evolving  industry  standards,  changes  in  customer
needs, emerging competition, new product introductions and strong price competition. For example,
Affymetrix recently released a 100k SNP genotyping chip and has announced a 500k chip which will
compete with our SNP genotyping service and product offerings and several competitors have begun
selling  a  single  chip  for  whole  human  genome  expression  which  may  compete  with  our  gene
expression product offerings. One or more of our competitors may render our technology obsolete or
uneconomical. Our competitors have greater financial and personnel resources, broader product lines,
a more established customer base and more experience in research and development than we have.
Furthermore, the life sciences and pharmaceutical companies, which are our potential customers and
strategic partners, could develop competing products. If we are unable to develop enhancements to
our technology and rapidly deploy new product offerings, our business, financial condition and results
of operations will suffer.

37

We have generated only moderate amounts of revenue from product and service offerings to
date. We expect to continue to incur net losses and we may not achieve or maintain
profitability.

We have incurred net losses since our inception and expect to continue to incur net losses at least
through early 2005. At January 2, 2005 our accumulated deficit was approximately $123.7 million, and
we incurred a net loss of $6.2 million for the year ended January 2, 2005. The magnitude of our net
losses  will  depend,  in  part,  on  the  rate  of  growth,  if  any,  of  our  revenue  and  on  the  level  of  our
expenses.  We  expect  to  continue  incurring  significant  expenses  for  research  and  development,  for
developing  our  manufacturing  capabilities  and  for  sales  and  marketing  efforts  to  commercialize  our
products. In addition, we expect that our selling and marketing expenses will increase at a higher rate
in  the  future  as  a  result  of  the  launch  of  new  products.  As  a  result,  we  expect  that  our  operating
expenses will increase significantly as we grow and, consequently, we will need to generate significant
additional  revenue  to  achieve  profitability.  Even  if  we  achieve  profitability,  we  may  not  be  able  to
sustain or increase profitability on a quarterly or annual basis.

We have a limited history of commercial sales of systems and consumable products, and our
success depends on our ability to develop commercially successful products and on market
acceptance of our new and relatively unproven technologies.

We may not possess all of the resources, capability and intellectual property necessary to develop
and  commercialize  all  the  products  or  services  that  may  result  from  our  technologies.  Sales  of  our
genotyping and gene expression systems only began in 2003, and some of our other technologies are
in the early stages of commercialization or are still in development. You should evaluate us in light of
the uncertainties and complexities affecting similarly situated companies developing tools for the life
sciences and pharmaceutical industries. We must conduct a substantial amount of additional research
and  development  before  some  of  our  products  will  be  ready  for  sale  and  we  currently  have  fewer
resources available for research and development activities than many of our competitors. We may not
be able to develop or launch new products in a timely manner, or at all, or they may not meet customer
requirements  or  be  of  sufficient  quality  or  price  that  enables  us  to  compete  effectively  in  the
marketplace. Problems frequently encountered in connection with the development or early commer-
cialization  of  products  and  services  using  new  and  relatively  unproven  technologies  might  limit  our
ability  to  develop  and  successfully  commercialize  these  products  and  services.  In  addition,  we  may
need to enter into agreements to obtain intellectual property necessary to commercialize some of our
products or services.

Historically,  life  sciences  and  pharmaceutical  companies  have  analyzed  genetic  variation  and
function  using  a  variety  of  technologies.  In  order  to  be  successful,  our  products  must  meet  the
commercial requirements of the life sciences and pharmaceutical industries as tools for the large-scale
analysis of genetic variation and function.

Market acceptance will depend on many factors, including:

) our  ability  to  demonstrate  to  potential  customers  the  benefits  and  cost  effectiveness  of  our

products and services relative to others available in the market;

) the extent and effectiveness of our efforts to market, sell and distribute our products;

) our ability to manufacture products in sufficient quantities with acceptable quality and reliability

and at an acceptable cost; and

) the  willingness  and  ability  of  customers  to  adopt  new  technologies  requiring  capital

investments.

38

Any inability to adequately protect our proprietary technologies could harm our competitive
position.

Our success will depend in part on our ability to obtain patents and maintain adequate protection
of  our  intellectual  property  in  the  United  States  and  other  countries.  If  we  do  not  protect  our
intellectual property adequately, competitors may be able to use our technologies and thereby erode
our competitive advantage. The laws of some foreign countries do not protect proprietary rights to the
same  extent  as  the  laws  of  the  United  States,  and  many  companies  have  encountered  significant
problems in protecting their proprietary rights abroad. These problems can be caused by the absence
of rules and methods for defending intellectual property rights.

The  patent  positions  of  companies  developing  tools  for  the  life  sciences  and  pharmaceutical
industries, including our patent position, generally are uncertain and involve complex legal and factual
questions. We will be able to protect our proprietary rights from unauthorized use by third parties only
to  the  extent  that  our  proprietary  technologies  are  covered  by  valid  and  enforceable  patents  or  are
effectively  maintained  as  trade  secrets.  We  will  apply  for  patents  covering  our  technologies  and
products, as we deem appropriate. However, our patent applications may be challenged and may not
result in issued patents. Our existing patents and any future patents we obtain may not be sufficiently
broad  to  prevent  others  from  practicing  our  technologies  or  from  developing  competing  products.
There also is risk that others may independently develop similar or alternative technologies or design
around  our  patented  technologies.  Also,  our  patents  may  fail  to  provide  us  with  any  competitive
advantage. We may need to initiate additional lawsuits to protect or enforce our patents, or litigate
against third party claims, which would be expensive and, if we lose, may cause us to lose some of our
intellectual property rights and reduce our ability to compete in the marketplace.

We  also  rely  upon  trade  secret  protection  for  our  confidential  and  proprietary  information.  We
have taken security measures to protect our proprietary information. These measures, however, may
not  provide  adequate  protection  for  our  trade  secrets  or  other  proprietary  information.  We  seek  to
protect  our  proprietary  information  by  entering  into  confidentiality  agreements  with  employees,
collaborators and consultants. Nevertheless, employees, collaborators or consultants may still disclose
our  proprietary  information,  and  we  may  not  be  able  to  meaningfully  protect  our  trade  secrets.  In
addition,  others  may  independently  develop  substantially  equivalent  proprietary  information  or
techniques or otherwise gain access to our trade secrets.

We have limited experience in manufacturing commercial products.

We have limited experience manufacturing our products in the volumes that will be necessary for
us to achieve significant commercial sales. We have only recently begun manufacturing products on a
commercial-scale  and,  in  the  past,  we  have  experienced  variations  in  manufacturing  conditions  that
have temporarily reduced production yields. Due to the intricate nature of manufacturing products that
contain DNA, we may encounter similar or previously unknown manufacturing difficulties in the future
that could significantly reduce production yields, impact our ability to launch or sell these products, or
to produce them economically, may prevent us from achieving expected performance levels or cause
us to set prices that hinder wide adoption by customers.

39

Our sales, marketing and technical support organization may limit our ability to sell our
products.

We currently have fewer resources available for sales and marketing and technical support services
as compared to our primary competitors and have only recently established a small direct sales force
and customer support team. In order to effectively commercialize our genotyping and gene expression
systems  and  other  products  to  follow,  we  will  need  to  expand  our  sales,  marketing  and  technical
support  staff  both  domestically  and  internationally.  We  may  not  be  successful  in  establishing  or
maintaining  either  a  direct  sales  force  or  distribution  arrangements  to  market  our  products  and
services.  In  addition,  we  compete  primarily  with  much  larger  companies,  that  have  larger  sales  and
distribution staffs and a significant installed base of products in place, and the efforts from a limited
sales  and  marketing  force  may  not  be  sufficient  to  build  the  market  acceptance  of  our  products
required to support continued growth of our business.

If we are unable to develop and maintain operation of our manufacturing capability, we may
not be able to launch or support our products in a timely manner, or at all.

We currently possess only one facility capable of manufacturing our products and services for both
sale to our customers and internal use. If a natural disaster were to significantly damage our facility or if
other events were to cause our operations to fail, these events could prevent us from developing and
manufacturing our products and services.

If we are unable to find third-party manufacturers to manufacture components of our
products, we may not be able to launch or support our products in a timely manner, or at all.

The  nature  of  our  products  requires  customized  components  that  currently  are  available  from  a
limited  number  of  sources.  For  example,  we  currently  obtain  the  fiber  optic  bundles  and  BeadChip
slides included in our products from single vendors. If we are unable to secure a sufficient supply of
those  or  other  product  components,  we  will  be  unable  to  meet  demand  for  our  products.  We  may
need  to  enter  into  contractual  relationships  with  manufacturers  for  commercial-scale  production  of
some of our products, or develop these capabilities internally, and we cannot assure you that we will
be  able  to  do  this  on  a  timely  basis,  for  sufficient  quantities  or  on  commercially  reasonable  terms.
Accordingly,  we  may  not  be  able  to  establish  or  maintain  reliable,  high-volume  manufacturing  at
commercially reasonable costs.

We may encounter difficulties in managing our growth. These difficulties could increase our
losses.

We  expect  to  experience  rapid  and  substantial  growth  in  order  to  achieve  our  operating  plans,
which will place a strain on our human and capital resources. If we are unable to manage this growth
effectively,  our  losses  could  increase.  Our  ability  to  manage  our  operations  and  growth  effectively
requires  us  to  continue  to  expend  funds  to  enhance  our  operational,  financial  and  management
controls,  reporting  systems  and  procedures  and  to  attract  and  retain  sufficient  numbers  of  talented
employees. If we are unable to scale up and implement improvements to our manufacturing process
and control systems in an efficient or timely manner, or if we encounter deficiencies in existing systems
and  controls,  then  we  will  not  be  able  to  make  available  the  products  required  to  successfully
commercialize our technology. Failure to attract and retain sufficient numbers of talented employees
will further strain our human resources and could impede our growth.

40

We may need additional capital in the future. If additional capital is not available on
acceptable terms, we may have to curtail or cease operations.

Our future capital requirements will be substantial and will depend on many factors including our
ability to successfully market our genetic analysis systems and services, the need for capital expendi-
tures to support and expand our business, the progress and scope of our research and development
projects, the filing, prosecution and enforcement of patent claims, the outcome of our legal proceed-
ings with Affymetrix and the need to enter into collaborations with other companies or acquire other
companies  or  technologies  to  enhance  or  complement  our  product  and  service  offerings.  We
anticipate that our existing capital resources will enable us to maintain currently planned operations for
at least 24 months. However, we premise this expectation on our current operating plan, which may
change  as  a  result  of  many  factors.  Consequently,  we  may  need  additional  funding  within  this
timeframe. Our inability to raise capital would seriously harm our business and product development
efforts.  In  addition,  we  may  choose  to  raise  additional  capital  due  to  market  conditions  or  strategic
considerations, such as an acquisition, even if we believe we have sufficient funds for our current or
future  operating  plans.  To  the  extent  that  additional  capital  is  raised  through  the  sale  of  equity,  the
issuance of these securities could result in dilution to our stockholders.

We currently have no credit facility or committed sources of capital available as of January 2, 2005.
To the extent operating and capital resources are insufficient to meet future requirements; we will have
to  raise  additional  funds  to  continue  the  development  and  commercialization  of  our  technologies.
These funds may not be available on favorable terms, or at all. If adequate funds are not available on
attractive terms, we may be required to curtail operations significantly or to obtain funds by entering
into financing, supply or collaboration agreements on unattractive terms.

If we lose our key personnel or are unable to attract and retain additional personnel, we may
be unable to achieve our goals.

We are highly dependent on our management and scientific personnel, including Jay Flatley, our
president and chief executive officer, David Barker, our vice president and chief scientific officer, and
John Stuelpnagel, our senior vice president and chief operating officer. The loss of their services could
adversely  impact  our  ability  to  achieve  our  business  objectives.  In  addition,  Timothy  Kish,  our  chief
financial  officer,  has  informed  us  of  his  intention  to  resign  in  the  second  quarter  of  2005.  Mr.  Kish
continues  in  his  role  as  chief  financial  officer,  and  we  are  currently  conducting  a  search  for  his
successor.  We  will  need  to  hire  additional  qualified  personnel  with  expertise  in  molecular  biology,
chemistry, biological information processing, sales, marketing and technical support. We compete for
qualified  management  and  scientific  personnel  with  other  life  science  companies,  universities  and
research  institutions,  particularly  those  focusing  on  genomics.  Competition  for  these  individuals,
particularly in the San Diego area, is intense, and the turnover rate can be high. Failure to attract and
retain  management  and  scientific  personnel  would  prevent  us  from  pursuing  collaborations  or
developing our products or technologies.

Our planned activities will require additional expertise in specific industries and areas applicable to
the  products  developed  through  our  technologies,  including  the  life  sciences  and  healthcare  indus-
tries. Thus, we will need to add new personnel, including management, and develop the expertise of
existing management. The failure to do so could impair the growth of our business.

41

We may encounter difficulties in integrating future acquisitions and that could adversely
affect our business.

We  have  recently  signed  a  definitive  agreement  to  acquire  CyVera  Corporation  and  may  in  the
future  acquire  technology,  products  or  businesses  related  to  our  current  or  future  business.  Our
acquisition of CyVera is expected to close in March 2005; however, the closing is subject to satisfaction
of customary closing conditions, and we cannot assure you this transaction will close in this timeframe
or at all. We have limited experience in acquisition activities and may have to devote substantial time
and  resources  in  order  to  complete  acquisitions.  Further,  these  potential  acquisitions  entail  risks,
uncertainties  and  potential  disruptions  to  our  business.  For  example,  we  may  not  be  able  to
successfully  integrate  a  company’s  operations,  technologies,  products  and  services,  information
systems and personnel into our business. An acquisition may further strain our existing financial and
managerial  controls,  and  divert  management’s  attention  away  from  our  other  business  concerns.  In
connection with the CyVera acquisition, we will assume certain liabilities and hire certain employees of
CyVera, which is expected to result in an increase in research and development expenses. There may
also be unanticipated costs and liabilities associated with an acquisition that could adversely affect our
operating results.

A significant portion of our sales are to international customers.

Approximately  52%  of  our  revenues  for  the  year  ended  January  2,  2005  were  derived  from
customers outside the United States. We intend to continue to expand our international presence and
export sales to international customers and we expect the total amount of non-U.S. sales to continue
to grow. Export sales entail a variety of risks, including:

) currency exchange fluctuations;

) unexpected changes in legislative or regulatory requirements of foreign countries into which we

import our products;

) difficulties  in  obtaining  export  licenses  or  other  trade  barriers  and  restrictions  resulting  in

delivery delays; and

) significant taxes or other burdens of complying with a variety of foreign laws.

In addition, sales to international customers typically result in longer payment cycles and greater
difficulty  in  accounts  receivable  collection.  We  are  also  subject  to  general  geopolitical  risks,  such  as
political, social and economic instability and changes in diplomatic and trade relations. One or more of
these factors could have a material adverse effect on our business, financial condition and operating
results.

Our success depends upon the increasing availability of genetic information and the
continued emergence and growth of markets for analysis of genetic variation and function.

We  design  our  products  primarily  for  applications  in  the  life  sciences  and  pharmaceutical
industries. The usefulness of our technology depends in part upon the availability of genetic data and
its  usefulness  in  identifying  or  treating  disease.  We  are  initially  focusing  on  markets  for  analysis  of
genetic variation and function, namely SNP genotyping and gene expression profiling. Both of these
markets are new and emerging, and they may not develop as quickly as we anticipate, or reach their
full potential. Other methods of analysis of genetic variation and function may emerge and displace
the methods we are developing. Also, researchers may not seek or be able to convert raw genetic data
into  medically  valuable  information  through  the  analysis  of  genetic  variation  and  function.  If  useful
genetic data is not available or if our target markets do not develop in a timely manner, demand for
our products may grow at a slower rate than we expect, and we may not be able to achieve or sustain
profitability.

42

We expect that our results of operations will fluctuate. This fluctuation could cause our stock
price to decline.

Our  revenues  are  subject  to  fluctuations  due  to  the  timing  of  sales  of  high-value  products  and
services  projects,  the  impact  of  seasonal  spending  patterns,  the  timing  and  amount  of  government
grant funding programs, the timing and size of research projects our customers perform, changes in
overall  spending  levels  in  the  life  sciences  industry  and  other  unpredictable  factors  that  may  affect
customer ordering patterns. Given the difficulty in predicting the timing and magnitude of sales for our
products and services, we may experience quarter-to-quarter fluctuations in revenue resulting in the
potential for a sequential decline in quarterly revenue. A large portion of our expenses are relatively
fixed,  including  expenses  for  facilities,  equipment  and  personnel.  In  addition,  we  expect  operating
expenses to continue to increase significantly. Accordingly, if revenue does not grow as anticipated,
we may not be able to reduce our operating losses. Approximately 30% of our revenues for the year
2004  resulted  from  transactions  that  were  funded  under  the  International  HapMap  Project.  We
currently expect that most of the activities under this grant involving the Company and its customers
will  be  completed  in  early  2005.  Although  we  expect  that  the  loss  of  revenues  resulting  from  the
completion  of  the  HapMap  grant  may  be  offset  by  the  planned  commercial  launch  of  our  whole
genome  genotyping  and  gene  expression  arrays,  combined  with  the  continued  expansion  of  our
existing product lines, any significant delays in the commercial launch of these products, unfavorable
sales trends in our existing product lines, or impacts from the other factors mentioned above, could
adversely affect our revenue growth in 2005 or cause a sequential decline in quarterly revenues. Due to
the possibility of fluctuations in our revenue and expenses, we believe that quarterly comparisons of
our  operating  results  are  not  a  good  indication  of  our  future  performance.  If  our  operating  results
fluctuate  or  do  not  meet  the  expectations  of  stock  market  analysts  and  investors,  our  stock  price
probably would decline.

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

Interest Rate Sensitivity

Our  exposure  to  market  risk  for  changes  in  interest  rates  relates  primarily  to  our  investment
portfolio. The fair market value of fixed rate securities may be adversely impacted by fluctuations in
interest rates while income earned on floating rate securities may decline as a result of decreases in
interest rates. Under our current policies, we do not use interest rate derivative instruments to manage
exposure  to  interest  rate  changes.  We  ensure  the  safety  and  preservation  of  our  invested  principal
funds by limiting default risk, market risk and reinvestment risk. We mitigate default risk by investing in
investment grade securities. We have historically maintained a relatively short average maturity for our
investment portfolio, and a hypothetical 100 basis point adverse move in interest rates along the entire
interest  rate  yield  curve  would  not  materially  affect  the  fair  value  of  our  interest  sensitive  financial
instruments.

Foreign Currency Exchange Risk

Although most of our revenue is realized in U.S. dollars, some portions of our revenue are realized
in foreign currencies. As a result, our financial results could be affected by factors such as changes in
foreign  currency  exchange  rates  or  weak  economic  conditions  in  foreign  markets.  The  functional
currencies of our subsidiaries are their respective local currencies. Accordingly, the accounts of these
operations are translated from the local currency to the U.S. dollar using the current exchange rate in
effect at the balance sheet date for the balance sheet accounts, and using the average exchange rate
during  the  period  for  revenue  and  expense  accounts.  The  effects  of  translation  are  recorded  in
accumulated other comprehensive income as a separate component of stockholders equity.

43

Exchange  gains  and  losses  arising  from  transactions  denominated  in  foreign  currencies  are
recorded  in  operations.  In  July  2004,  we  began  hedging  significant  foreign  currency  firm  sales
commitments  and  accounts  receivable  with  forward  contracts.  We  only  use  derivative  financial
instruments  to  reduce  foreign  currency  exchange  rate  risks;  we  do  not  hold  any  derivative  financial
instruments  for  trading  or  speculative  purposes.  Our  forward  exchange  contracts  have  been  desig-
nated as cash flow hedges and accordingly, to the extent effective, any unrealized gains or losses on
these foreign currency forward contracts are reported in other comprehensive income. Realized gains
and losses for the effective portion are recognized with the underlying hedge transaction. The notional
settlement  amount  of  the  foreign  currency  forward  contracts  outstanding  at  January  2,  2005  was
approximately $4.0 million. These contracts had a fair value of approximately $0.2 million, representing
an unrealized loss, and were included in other current liabilities at January 2, 2005. As of January 2,
2005, all contracts were set to expire at various times through July 29, 2005 and are with reputable
bank institutions. For the year ended January 2, 2005, there were no amounts recognized in earnings
due to hedge ineffectiveness and we settled foreign exchange contracts of approximately $0.3 million.
We have hedged all significant firm commitments denominated in foreign currencies, and as a result,
any increase or decrease in the exchange rates of these commitments would have no net effect to our
balance sheet or our results of operations.

Item 8. Financial Statements and Supplementary Data.

The Report of Independent Registered Public Accounting Firm, Financial Statements and Notes to
Financial  Statements  begin  on  page  F-1  immediately  following  the  signature  page  and  are  incorpo-
rated herein by reference.

Our fiscal year is 52 or 53 weeks ending on the Sunday closest to December 31, with quarters of
13  or  14  weeks  ending  on  the  Sunday  closest  to  March  31,  June  30  and  September  30.  The  years
ended January 2, 2005 and December 28, 2003 are 53 and 52 weeks, respectively.

Item 9. Changes In and Disagreements With Accountants on Accounting and Financial

Disclosure.

None.

Item 9A. Controls and Procedures.

We have established and maintain disclosure controls and procedures to ensure that we record,
process,  summarize,  and  report  information  we  are  required  to  disclose  in  our  periodic  reports  filed
with the Securities and Exchange Commission in the manner and within the time periods specified in
the  SEC’s  rules  and  forms.  We  also  design  our  disclosure  controls  to  ensure  that  the  information  is
accumulated  and  communicated  to  our  management,  including  the  chief  executive  officer  and  the
chief financial officer, as appropriate to allow timely decisions regarding required disclosure. We also
maintain  internal  controls  and  procedures  to  ensure  that  we  comply  with  applicable  laws  and  our
established  financial  policies.  We  design  our  internal  controls  to  provide  reasonable  assurance  that
(1)  our  transactions  are  properly  authorized;  (2)  our  assets  are  safeguarded  against  unauthorized  or
improper  use;  and  (3)  our  transactions  are  properly  recorded  and  reported  in  conformity  with
accounting principles generally accepted in the United States.

44

We  have  evaluated  the  design  and  operation  of  our  disclosure  controls  and  procedures  to
determine whether they are effective in ensuring that the disclosure of required information is timely
made  in  accordance  with  the  Exchange  Act  and  the  rules  and  regulations  of  the  Securities  and
Exchange Commission. This evaluation was made under the supervision and with the participation of
management, including our chief executive officer and chief financial officer as of January 2, 2005. Our
management does not expect that our disclosure controls or our internal controls will prevent all error
and  all  fraud.  A  control  system,  no  matter  how  well  conceived  and  operated,  can  provide  only
reasonable,  not  absolute,  assurance  that  the  objectives  of  the  control  system  are  met.  Further,  the
design of a control system must reflect the fact that there are resource constraints, and the benefits of
controls  must  be  considered  relative  to  their  costs.  Because  of  the  inherent  limitations  in  all  control
systems, no evaluation of controls can provide absolute assurance that all control issues and instances
of fraud, if any, have been detected. These inherent limitations include the realities that judgments in
decision-making can be faulty, and that breakdowns can occur because of a simple error or mistake.
Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two
or more people, or by management override of the control. The design of any system of controls 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;  over  time,  controls  may  become  inadequate  because  of  changes  in  conditions,  or  the
degree  of  compliance  with  the  policies  or  procedures  may  deteriorate.  Because  of  the  inherent
limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be
detected.

The chief executive officer and chief financial officer have concluded, based on their review, that
our disclosure controls and procedures, as defined by Exchange Act Rules 13a-15(e) and 15d-15(e), are
effective  to  ensure  that  information  required  to  be  disclosed  by  us  in  reports  that  we  file  under  the
Exchange Act is recorded, processed, summarized and reported within the time periods specified in
the Securities and Exchange Commission rules and forms. In addition, no change in our internal control
over  financial  reporting  that  has  materially  affected,  or  is  reasonably  likely  to  materially  affect,  our
internal control over financial reporting has occurred during the fourth quarter of 2004.

Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over
financial  reporting,  as  such  term  is  defined  in  Exchange  Act  Rules  13a-15(f).  Because  of  its  inherent
limitations, internal control over financial reporting may not prevent or detect misstatements. There-
fore,  even  those  systems  determined  to  be  effective  can  provide  only  reasonable  assurance  with
respect to financial statement preparation and presentation.

We  conducted  an  evaluation  of  the  effectiveness  of  our  internal  control  over  financial  reporting
based  on  the  framework  in  Internal  Control — Integrated  Framework  issued  by  the  Committee  of
Sponsoring Organizations of the Treadway Commission. Based on our evaluation under the framework
in Internal Control — Integrated Framework, our management concluded that our internal control over
financial reporting was effective as of January 2, 2005.

Our management’s assessment of the effectiveness of our internal control over financial reporting
as  of  January  2,  2005  has  been  audited  by  Ernst  &  Young  LLP,  Independent  Registered  Public
Accounting Firm, as stated in their report which is included on page F-3 herein.

Item 9B. Other Information.

None.

45

Item 10. Directors and Executive Officers of the Registrant.

PART III

(a) Identification  of  Directors.  Information  concerning  our  directors  is  incorporated  by  reference
from  the  section  entitled  ‘‘Proposal  1 — Election  of  Directors’’  contained  in  our  definitive  Proxy
Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the SEC no later
than April 26, 2005.

(b) Identification of Executive Officers. Information concerning our executive officers is set forth
under ‘‘Executive Officers’’ in Part I of this Annual Report on Form 10-K and is incorporated herein by
reference.

(c) Compliance with Section 16(a) of the Exchange Act. Information concerning compliance with
Section  16(a)  of  the  Securities  Exchange  Act  of  1934  is  incorporated  by  reference  from  the  section
entitled  ‘‘Compliance  with  Section  16(a)  of  the  Securities  Exchange  Act’’  contained  in  our  definitive
Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the SEC no
later than April 26, 2005.

(d) Information  concerning  the  audit  committee  financial  expert  as  defined  by  the  SEC  rules
adopted pursuant to the Sarbanes-Oxley Act of 2002 is incorporated by reference from our definitive
Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the SEC no
later than April 26, 2005.

Code of Ethics

We have adopted a code of ethics for our directors, officers and employees, which is available on
our  website  at  www.illumina.com  in  the  Corporate  Governance  section  under  ‘‘Investors’’.  The
information on our website is not incorporated by reference into this report.

Item 11. Executive Compensation.

Information  concerning  executive  compensation  is  incorporated  by  reference  from  the  sections
entitled ‘‘Executive Compensation and Other Information’’ contained in our definitive Proxy Statement
with  respect  to  our  2005  Annual  Meeting  of  Stockholders  to  be  filed  with  the  SEC  no  later  than
April 26, 2005.

Item 12. Security Ownership of Certain Beneficial Owners and Management.

Information  concerning  the  security  ownership  of  certain  beneficial  owners  and  management  is
incorporated  by  reference  from  the  section  entitled  ‘‘Ownership  of  Securities’’  contained  in  our
definitive Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with
the SEC no later than April 26, 2005.

46

Equity Compensation Plan Information

The following table presents information about our common stock that may be issued upon the
exercise  of  options,  warrants  and  rights  under  all  our  existing  equity  compensation  plans  as  of
January 2, 2005. We currently have two equity compensation plans, the 2000 employee stock purchase
plan and the 2000 stock plan; prior to our initial public offering we granted options under the 1998
stock incentive plan. All of these plans have been approved by our stockholders. Options outstanding
include options granted under both the 1998 stock incentive plan and the 2000 stock plan.

Plan Category

Equity compensation plans

approved by security holders
Equity compensation plans not
approved by security holders
Total**************************

(a) Number of
Securities to be
Issued Upon
Exercise of
Outstanding
Options

6,206,020

—
6,206,020

(b) Weighted-
Average
Exercise Price
of Outstanding
Options

$6.99

$ —
$6.99

(c) Number of
Securities
Remaining
Available for
Future Issuance
Under Equity
Compensation
Plans (Excluding
Securities
Reflected in
Column (a))

5,964,649

—
5,964,649

Please refer to Note 6 in notes to consolidated financial statements included in our annual report
on Form 10-K for the year ended January 2, 2005 for a description of our equity compensation plans.

Item 13. Certain Relationships and Related Transactions.

Information concerning certain relationships and related transactions is incorporated by reference
from the sections entitled ‘‘Proposal One: Election of Directors,’’ ‘‘Executive Compensation and Other
Information’’ and ‘‘Certain Transactions’’ contained in our Definitive Proxy Statement with respect to
our 2005 Annual Meeting of Stockholders to be filed with the SEC no later than April 26, 2005.

Item 14. Principal Accounting Fees and Services.

Information concerning principal accounting fees and services is incorporated by reference from
the sections entitled ‘‘Proposal Two: Ratification of Independent Auditors’’ contained in our Definitive
Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the SEC no
later than April 26, 2005.

47

Item 15. Exhibits, Financial Statement Schedules.

PART IV

(a) The following documents are filed as a part of this report:

(1) Consolidated Financial Statements:

Index to Consolidated Financial Statements ************************************
Report of Ernst & Young LLP, Independent Registered Public Accounting Firm *****
Report of Ernst & Young LLP, Independent Registered Public Accounting
Firm on Internal Control over Financial Reporting *******************************
Consolidated Balance Sheets as of January 2, 2005 and December 28, 2003 ******
Consolidated Statements of Operations for the years Ended January 2, 2005,

December 28, 2003 and December 29, 2002 *********************************
Consolidated Statements of Stockholders’ Equity for the period from December 31,
2000 to January 2, 2005****************************************************

Consolidated Statements of Cash flows for the years Ended January 2, 2005,

December 28, 2003 and December 29, 2002 *********************************
Notes to Consolidated Financial Statements ************************************

(2) Financial Statement Schedules:

Page

F-1
F-2

F-3
F-4

F-5

F-6

F-7
F-8

Valuation and Qualifying Account and Reserves for the three year period ended

January 2, 2005 ***********************************************************

F-28

(3) Exhibits:

Exhibit
Number

2.1(1)

3.1(2)
3.2(1)
3.3(5)

4.1(1)
4.2(1)

4.3(5)

+10.1(1)

+10.2(1)
+10.3(2)
10.4(1)

10.5(1)

10.6(1)

10.7(1)

Description of Document

Form of Merger Agreement between Illumina, Inc., a California corporation, and Illumina,
Inc., a Delaware corporation.
Amended and Restated Certificate of Incorporation.
Bylaws.
Certificate of Designation for Series A Junior Participating Preferred Stock (included as an
exhibit to exhibit 4.3).
Specimen Common Stock Certificate.
Amended  and  Restated  Investors  Rights  Agreement,  dated  November  5,  1999,  by  and
among the Registrant and certain stockholders of the Registrant.
Rights Agreement, dated as of May 3, 2001, between the Company and Equiserve Trust
Company, N.A.
Form of Indemnification Agreement between the Registrant and each of its directors and
officers.
1998 Incentive Stock Plan.
2000 Employee Stock Purchase Plan (Filed as Exhibit 99.2).
Sublease  Agreement  dated  August  1998  between  Registrant  and  Gensia  Sicor  Inc.  for
Illumina’s principal offices.
Joint  Development  Agreement  dated  November  1999  between  Registrant  and  PE
Corporation (with certain confidential portions omitted).
Asset  Purchase  Agreement  dated  November  1998  between  Registrant  and  nGenetics,
Inc. (with certain confidential portions omitted).
Asset  Purchase  Agreement  dated  March  2000  between  Registrant  and  Spyder
Instruments, Inc. (with certain confidential portions omitted).

48

Exhibit
Number

10.8(1)

10.9(1)

+10.10(3)
10.11(1)

Description of Document

License  Agreement  dated  May  1998  between  Tufts  and  Registrant  (with  certain
confidential portions omitted).
Master Loan and Security Agreement, dated March 6, 2000, by and between Registrant
and FINOVA Capital Corporation.
2000 Stock Plan (Filed as Exhibit 99.1).
Eastgate  Pointe  Lease,  dated  July  6,  2000,  between  Diversified  Eastgate  Venture  and
Registrant.

10.12(1) Option Agreement and Joint Escrow Instructions, dated July 6, 2000, between Diversified

10.13(4)

10.14(6)

10.15(7)

10.16(7)

10.17(7)

10.18(8)

10.19(8)

10.20(8)

Eastgate Venture and Registrant.
First  Amendment  to  Joint  Development  Agreement  dated  March  27,  2001  between
Registrant  and  PE  Corporation,  now  known  as  Applied  Biosystems  Group  (with  certain
confidential portions omitted).
First  Amendment  to  Option  Agreement  and  Escrow  Instructions  dated  May  25,  2001
between Diversified Eastgate Venture and Registrant.
Second Amendment to Option Agreement and Escrow Instructions dated July 18, 2001
between Diversified Eastgate Venture and Registrant.
Third  Amendment  to  Option  Agreement  and  Escrow  Instructions  dated  September  27,
2001 between Diversified Eastgate Venture and Registrant.
First  Amendment  to  Eastgate  Pointe  Lease  dated  September  27,  2001  between
Diversified Eastgate Venture and Registrant.
Replacement Reserve Agreement, dated as of January 10, 2002, between the Company
and  BNY  Western  Trust  Company  as  Trustee  for  Washington  Capital  Joint  Master  Trust
Mortgage Income Fund.
Loan Assumption and Modification Agreement, dated as of January 10, 2002, between
the Company, Diversified Eastgate Venture and BNY Western Trust Company as Trustee
for Washington Capital Joint Master Trust Mortgage Income Fund.
Tenant  Improvement  and  Leasing  Commission  Reserve  Agreement,  dated  as  of
January 10, 2002, between the Company and BNY Western Trust Company as Trustee for
Washington Capital Joint Master Trust Mortgage Income Fund.

49

Exhibit
Number

+10.21(8)
+10.22(8)
10.23(9)

Description of Document

2000 Employee Stock Purchase Plan as amended on March 21, 2002.
2000 Stock Plan as amended on March 21, 2002.
License  Agreement  dated  January  2002  between  Amersham  Biosciences  Corp.  and
Registrant (with certain confidential portions omitted).

10.24(10) License  Agreement  dated  June  2002  between  Dade  Behring  Marburg  GmbH  and

Registrant (with certain confidential portions omitted).

10.25(11) Purchase  and  Sale  Agreement  and  Escrow  Instructions  dated  June  18,  2004  between

Bernardo Property Advisors, Inc. and Registrant.

10.26(12) Single  Tenant  Lease  dated  August  18,  2004  between  BioMed  Realty  Trust  Inc.  and

Registrant.

10.27(12) Settlement  and  Cross  License  Agreement  dated  August  18,  2004  between  Applera

10.28

10.29
14(10)
21
23.1
24.1
31.1
31.2

32.1

32.2

Corporation and Registrant (with certain confidential portions omitted).
Collaboration  Agreement  dated  December  17,  2004  between  Invitrogen  Incorporated
and Registrant (confidential treatment has been requested with respect to certain portions
of this exhibit).
Forms of Stock Option Agreement under 2000 Stock Plan.
Code of Ethics.
Subsidiaries of the Company.
Consent of Ernst & Young LLP, Independent Registered Public Accounting Firm.
Power of Attorney (included on the signature page).
Certification of Jay T. Flatley pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
Certification  of  Timothy  M.  Kish  pursuant  to  Section  302  of  the  Sarbanes-Oxley  Act  of
2002.
Certification of Jay T. Flatley pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002.
Certification of Timothy M. Kish pursuant to 18 U.S.C. Section 1350, as adopted pursuant
to Section 906 of the Sarbanes-Oxley Act of 2002.

+ Management contract or corporate plan or arrangement

(1) Incorporated by reference to the same numbered exhibit filed with our Registration Statement on

Form S-1 (333-33922) filed April 3, 2000, as amended.

(2) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  our  Annual  Report  on

Form 10-K for the year ended December 31, 2000.

(3) Incorporated by reference to the corresponding exhibit filed with our Registration Statement on

Form S-8 filed March 29, 2001.

(4) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  our  Form  10-Q  for  the

quarterly period ended March 31, 2001 filed May 8, 2001.

(5) Incorporated by reference to the same numbered exhibit filed with our Registration Statement on

Form 8-A (000-30361) filed May 14, 2001.

(6) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  our  Form  10-Q  for  the

quarterly period ended June 30, 2001 filed August 13, 2001.

(7) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  our  Form  10-Q  for  the

quarterly period ended September 30, 2001 filed November 14, 2001.

(8) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  our  Form  10-Q  for  the

quarterly period ended March 31, 2002 filed May 13, 2002.

(9) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  Amendment  No.  1  to  our

Registration Statement on Form S-3 (333-111496) filed March 2, 2004.

50

(10) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  our  Annual  Report  on

Form 10-K for the year ended December 28, 2003.

(11) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  our  Form  10-Q  for  the

quarterly period ended June 27, 2004 filed August 6, 2004.

(12) Incorporated  by  reference  to  the  same  numbered  exhibit  filed  with  our  Form  10-Q  for  the

quarterly period ended October 3, 2004 filed November 12, 2004.

Supplemental Information

No Annual Report to stockholders or proxy materials has been sent to stockholders as of the date
of  this  report.  The  Annual  Report  to  stockholders  and  proxy  material  will  be  furnished  to  our
stockholders subsequent to the filing of this report and we will furnish such material to the SEC at that
time.

51

SIGNATURES

Pursuant to the requirements of the Section 13 or 15(d) of the Securities Exchange Act of 1934, the
Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly
authorized, on March 8, 2005.

ILLUMINA, INC.

By:

/s/

JAY T. FLATLEY

Jay T. Flatley
President and Chief Executive Officer

March 8, 2005

POWER OF ATTORNEY

KNOW  ALL  PERSONS  BY  THESE  PRESENT,  that  each  person  whose  signature  appears  below
constitutes and appoints Jay T. Flatley and Timothy M. Kish, and each or any one of them, his true and
lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his
name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report
on  Form  10-K,  and  to  file  the  same,  with  all  exhibits  thereto,  and  other  documents  in  connection
therewith,  with  the  Securities  and  Exchange  Commission,  granting  unto  said  attorneys-in-fact  and
agents, and each of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he
might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents,
or any of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue
hereof.

Pursuant  to  the  requirements  of  the  Securities  Exchange  Act  of  1934,  this  Annual  Report  on
Form  10-K  has  been  signed  below  by  the  following  persons  on  behalf  of  the  registrant  and  in  the
capacities and on the dates indicated.

/s /

JAY T. FLATLEY
Jay T. Flatley

/s/ TIMOTHY M. KISH
Timothy M. Kish

/s/

JOHN R. STUELPNAGEL
John R. Stuelpnagel

/s/ DANIEL M. BRADBURY
Daniel M. Bradbury

/s / KARIN EASTHAM
Karin Eastham

President and Chief Executive
Officer Director (Principal
Executive Officer)

March 8, 2005

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

March 8, 2005

Senior Vice President and Chief
Operating Officer Director

March 8, 2005

Director

March 8, 2005

Director

March 8, 2005

52

/s/ R. SCOTT GREER
R. Scott Greer

/s/ WILLIAM H. RASTETTER
William H. Rastetter

/s/ DAVID R. WALT
David R. Walt

Director

March 8, 2005

Director

March 8, 2005

Director

March 8, 2005

53

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Ernst & Young LLP, Independent Registered Public Accounting Firm *************** F-2
Report of Ernst & Young LLP, Independent Registered Public Accounting Firm on Internal

Control over Financial Reporting ****************************************************** F-3
Consolidated Balance Sheets as of January 2, 2005 and December 28, 2003***************** F-4
Consolidated Statements of Operations for the years ended January 2, 2005, December 28,

2003 and December 29, 2002********************************************************* F-5

Consolidated Statements of Stockholders’ Equity for the period from December 30, 2001 to

January 2, 2005 ********************************************************************* F-6

Consolidated Statements of Cash Flows for the years ended January 2, 2005, December 28,

2003 and December 29, 2002********************************************************* F-7
Notes to Consolidated Financial Statements ********************************************** F-8

F-1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders
Illumina, Inc.

We have audited the accompanying consolidated balance sheets of Illumina, Inc. as of January 2,
2005 and December 28, 2003, and the related consolidated statements of operations, stockholders’
equity, and cash flows for the years ended January 2, 2005, December 28, 2003 and December 29,
2002. Our audits also include the financial statement schedule listed in the Index at Item 15(a). These
financial statements and schedule are the responsibility of the Company’s management. Our responsi-
bility is to express an opinion on these financial statements and schedule based on our audits.

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

In our opinion, the financial statements referred to above present fairly, in all material respects, the
consolidated financial position of Illumina, Inc. at January 2, 2005 and December 28, 2003, and the
results of its operations and its cash flows for the years ended January 2, 2005, December 28, 2003 and
December  29,  2002,  in  conformity  with  U.S.  generally  accepted  accounting  principles.  Also,  in  our
opinion,  the  related  financial  statement  schedule,  when  considered  in  relation  to  the  basic  consoli-
dated financial statements taken as a whole, presents fairly in all material respects the information set
forth therein.

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting
Oversight  Board  (United  States),  the  effectiveness  of  Illumina,  Inc.’s  internal  control  over  financial
reporting  as  of  January  2,  2005,  based  on  criteria  established  in  Internal  Control — Integrated
Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and
our report dated February 16, 2005 expressed an unqualified opinion thereon.

San Diego, California
February 16, 2004

/s/ ERNST & YOUNG LLP

F-2

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
ON INTERNAL CONTROL OVER FINANCIAL REPORTING

The Board of Directors and Stockholders
Illumina, Inc.

We  have  audited  management’s  assessment,  included  in  the  accompanying  Management’s
Report  on  Internal  Control  over  Financial  Reporting,  that  Illumina,  Inc.  maintained  effective  internal
control  over  financial  reporting  as  of  January  2,  2005,  based  on  criteria  established  in  Internal
Control — Integrated  Framework  issued  by  the  Committee  of  Sponsoring  Organizations  of  the
Treadway Commission (the COSO criteria). Illumina Inc.’s management is responsible for maintaining
effective internal control over financial reporting and for its assessment of the effectiveness of internal
control  over  financial  reporting.  Our  responsibility  is  to  express  an  opinion  on  management’s
assessment  and  an  opinion  on  the  effectiveness  of  the  company’s  internal  control  over  financial
reporting based on our audit.

We  conducted  our  audit  in  accordance  with  the  standards  of  the  Public  Company  Accounting
Oversight Board (United States). Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether effective internal control over financial reporting was maintained
in all material respects. Our audit included obtaining an understanding of internal control over financial
reporting,  evaluating  management’s  assessment,  testing  and  evaluating  the  design  and  operating
effectiveness of internal control, and performing such other procedures as we considered necessary in
the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable
assurance regarding the reliability of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting principles. A company’s internal
control  over  financial  reporting  includes  those  policies  and  procedures  that  (1)  pertain  to  the
maintenance  of  records  that,  in  reasonable  detail,  accurately  and  fairly  reflect  the  transactions  and
dispositions  of  the  assets  of  the  company;  (2)  provide  reasonable  assurance  that  transactions  are
recorded  as  necessary  to  permit  preparation  of  financial  statements  in  accordance  with  generally
accepted accounting principles, and that receipts and expenditures of the company are being made
only in accordance with authorizations of management and directors of the company; and (3) provide
reasonable  assurance  regarding  prevention  or  timely  detection  of  unauthorized  acquisition,  use,  or
disposition of the company’s assets that could have a material effect on the financial statements.

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

In our opinion, management’s assessment that Illumina, Inc. maintained effective internal control
over  financial  reporting  as  of  January  2,  2005,  is  fairly  stated,  in  all  material  respects,  based  on  the
COSO criteria. Also, in our opinion, Illumina, Inc. maintained, in all material respects, effective internal
control over financial reporting as of January 2, 2005, based on the COSO criteria.

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting
Oversight Board (United States), the consolidated balance sheets of Illumina, Inc. as of January 2, 2005
and December 28, 2003, and the related consolidated statements of operations, stockholders’ equity,
and cash flows for the years ended January 2, 2005, December 28, 2003 and December 29, 2002 of
Illumina, Inc. and our report dated February 16, 2005 expressed an unqualified opinion thereon.

San Diego, California
February 16, 2005

/s/ ERNST & YOUNG LLP

F-3

ILLUMINA, INC.

CONSOLIDATED BALANCE SHEETS

December 28,
January 2,
2003
2005
(In thousands, except
share amounts)

ASSETS

Current assets:

Cash and cash equivalents ************************************** $ 54,789
Investments, available for sale ***********************************
—
Restricted cash and investments *********************************
12,205
Accounts receivable, net ****************************************
11,891
Inventory, net **************************************************
3,807
Prepaid expenses and other current assets ************************
999
Total current assets *****************************************
Property and equipment, net ****************************************
Long-term restricted investments ************************************
Intangible and other assets, net *************************************

83,691
8,574
—
2,642
Total assets ************************************************ $ 94,907

LIABILITIES AND STOCKHOLDERS’ EQUITY

Current liabilities:

Accounts payable ********************************************** $
Accrued liabilities **********************************************
Litigation judgment*********************************************
Current portion of long-term debt *******************************
Current portion of equipment financing***************************
Total current liabilities **************************************
Long-term debt, less current portion *********************************
Advance payment from former collaborator ***************************
Litigation judgment*************************************************
Deferred gain on sale of land and building ***************************
Other long term liabilities *******************************************
Commitments and contingencies
Stockholders’ equity:

2,684
10,407
5,957
—
—

19,048
—
—
—
3,218
379

$ 12,465
20,317
100
4,549
2,022
965

40,418
45,777
12,191
848

$ 99,234

$

2,030
5,540
—
366
253

8,189
24,999
10,000
8,658
—
—

Common stock, $.01 par value, 120,000,000 shares authorized,
38,120,685 shares issued and outstanding at January 2, 2005,
32,886,693 shares issued and outstanding at December 28, 2003
Additional paid-in capital ***************************************
Deferred compensation *****************************************
Accumulated other comprehensive income ***********************
Accumulated deficit ********************************************
Total stockholders’ equity ***********************************
72,262
Total liabilities and stockholders’ equity*********************** $ 94,907

381
195,653
(156)
96
(123,712)

329
165,314
(1,103)
335
(117,487)

47,388

$ 99,234

See accompanying notes.

F-4

ILLUMINA, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

Year Ended
January 2,
2005
(In thousands except per share amounts)

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Revenue *********************************************
Product revenue **********************************
Service revenue **********************************
Research revenue *********************************
Total revenue*********************************

Costs and expenses:

Cost of product revenue***************************
Cost of service revenue ***************************
Research and development ************************
Selling, general and administrative *****************
Amortization of deferred compensation and other

stock-based compensation charges ***************
Litigation judgment (settlement) ********************
Total costs and expenses **********************
Loss from operations **********************************
Interest income ***************************************
Interest and other expense ****************************
Net loss *********************************************
Net loss per share, basic and diluted *******************

$40,497
8,075
2,011

50,583

$ 18,378
6,496
3,161

28,035

$ 4,103
3,305
2,632

10,040

11,572
1,687
21,114
25,080

844
(4,201)

56,096

(5,513)
941
(1,653)

7,437
2,600
22,511
18,899

2,454
756

54,657

(26,622)
1,821
(2,262)

1,815
1,721
26,848
9,099

4,360
8,052

51,895

(41,855)
3,805
(2,281)

$ (6,225)

$(27,063)

$(40,331)

$ (0.17)

$

(0.85)

$

(1.31)

Shares used in calculating net loss per share, basic and

diluted ********************************************

35,845

31,925

30,890

The composition of stock-based compensation is as

follows:
Research and development **************************
Selling, general and administrative *******************

$

$

348
496

844

$ 1,289
1,165

$ 2,454

$ 2,399
1,961

$ 4,360

See accompanying notes.

F-5

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l

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ILLUMINA, INC.

 CONSOLIDATED STATEMENTS OF CASH FLOWS

Cash flows from operating activities

Net loss **********************************************
Adjustments to reconcile net loss to net cash used in

operating activities:

Depreciation and amortization*************************
Loss on disposal of property and equipment************
Amortization of premium on investments ***************
Amortization of deferred compensation and other stock-

based compensation charges ***********************
Amortization of gain on sale of land and building *******
Changes in operating assets and liabilities:

Accounts receivable ********************************
Inventory******************************************
Prepaid expenses and other current assets ***********
Other assets***************************************
Accounts payable **********************************
Accrued liabilities **********************************
Accrued litigation judgment*************************
Other long term liabilities***************************
Advance payment from former collaborator***********
Net cash used in operating activities ***************

Cash flows from investing activities
Purchases of available-for-sale securities ********************
Sales and maturities of available-for-sale securities **********
Proceeds from sale of land and building, net of fees*********
Purchase of property and equipment***********************
Acquisition of intangible assets ****************************
Net cash provided by (used in) investing activities ***********
Cash flows from financing activities
Proceeds from long-term debt ****************************
Payments on long-term debt ******************************
Payments on equipment financing *************************
Proceeds from issuance of common stock ******************
Repurchase of common stock *****************************
Net cash provided by financing activities *******************
Effect of foreign currency translation on cash and cash

equivalents ********************************************
Net increase (decrease) in cash and cash equivalents ********
Cash and cash equivalents at beginning of the year *********
Cash and cash equivalents at end of the year ***************

Supplemental disclosures of cash flow information:
Cash paid during the year for interest **********************

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Year Ended
December 29,
2002

$ (6,225)

$(27,063)

$(40,331)

3,956
—
354

844
(156)

(7,202)
(1,785)
(29)
(2,041)
697
1,958
567
(512)
(10,000)

(19,574)

(6,603)
26,348
40,667
(3,355)
(35)

57,022

—
(25,387)
(232)
30,507
(13)

4,875

1

42,324
12,465

4,545
175
432

2,454
—

(1,296)
277
8
(151)
260
1,742
606
(245)
—

4,531
—
609

4,360
—

(2,878)
(1,328)
155
211
(205)
1,262
8,052
(31)
—

(18,256)

(25,593)

(1,940)
32,456
—
(2,032)
(16)

28,468

—
(342)
(337)
904
(9)

216

—

10,428
2,037

(116,568)
141,551
—
(26,830)
(794)

(2,641)

26,000
(293)
(297)
696
—

26,106

—

(2,128)
4,165

$ 54,789

$ 12,465

$ 2,037

$ 1,368

$ 2,222

$ 2,263

See accompanying notes.

F-7

ILLUMINA, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Organization and Summary of Significant Accounting Policies

Organization and Business

Illumina, Inc. (the ‘‘Company’’) was incorporated on April 28, 1998. The Company develops and
markets next-generation tools for the large-scale analysis of genetic variation and function. Using the
Company’s  technologies,  it  has  developed  a  comprehensive  line  of  products  that  are  designed  to
provide  the  throughput,  cost  effectiveness  and  flexibility  necessary  to  enable  researchers  in  the  life
sciences and pharmaceutical industries to perform the billions of tests necessary to extract medically
valuable  information  from  advances  in  genomics.  This  information  is  expected  to  correlate  genetic
variation and gene function with particular disease states, enhancing drug discovery, allowing diseases
to  be  detected  earlier  and  more  specifically,  and  permitting  better  choices  of  drugs  for  individual
patients.

Basis of Presentation

The  consolidated  financial  statements  of  the  Company  have  been  prepared  in  conformity  with
accounting  principles  generally  accepted  in  the  United  States  and  include  the  accounts  of  the
Company  and  its  wholly-owned  subsidiaries.  All  intercompany  transactions  and  balances  have  been
eliminated in consolidation.

Fiscal Year

The  Company’s  fiscal  year  is  52  or  53  weeks  ending  the  Sunday  closest  to  December  31,  with
quarters of 13 or 14 weeks ending the Sunday closest to March 31, June 30, and September 30. The
years ended January 2, 2005 and December  28, 2003 are 53 and 52 weeks, respectively.

Use of Estimates

The preparation of financial statements requires that management make estimates and assump-
tions  that  affect  the  reported  amounts  of  assets,  liabilities,  revenue  and  expenses,  and  related
disclosure of contingent assets and liabilities. Actual results could differ from those estimates.

Cash and Cash Equivalents

Cash and cash equivalents are comprised of highly liquid investments with a remaining maturity of

less than three months from the date of purchase.

Investments

The Company applies Statement of Financial Accounting Standards (‘‘SFAS’’) No. 115, Accounting
for  Certain  Investments  in  Debt  and  Equity  Securities,  to  its  investments.  Under  SFAS  No.  115,  the
Company  classifies  its  investments  as  ‘‘Available-for-Sale’’  and  records  such  assets  at  estimated  fair
value in the balance sheet, with unrealized gains and losses, if any, reported in stockholders’ equity.
The  Company  invests  its  excess  cash  balances  in  marketable  debt  securities,  primarily  government
securities  and  corporate  bonds  and  notes,  with  strong  credit  ratings  or  short  maturity  mutual  funds
providing  similar  financial  returns.  The  Company  limits  the  amount  of  investment  exposure  as  to
institutions,  maturity  and  investment  type.  The  cost  of  securities  sold  is  determined  based  on  the
specific identification method. Gross realized gains totaled $453,750, $342,693 and $810,201 for the
years ended January 2, 2005, December 28, 2003 and December 29, 2002, respectively. Gross realized
losses totaled $891, $141 and $27,467 for the years ended January 2, 2005, December 28, 2003, and
December 29, 2002, respectively.

F-8

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Restricted Cash and Investments

At January 2, 2005, restricted cash and investments consist of corporate debt securities that are
used as collateral against a letter of credit and a $100,000 bond deposit with the San Diego Superior
Court related to the Applied Biosystems litigation (see Note 7). At December 28, 2003, the restricted
investments used as collateral against the letter of credit were classified as long term.

Fair Value of Financial Instruments

The carrying amounts of certain of the Company’s financial instruments including cash and cash
equivalents, accounts and notes receivable, accounts payable and accrued liabilities approximate fair
value. The Company enters into foreign currency exchange forward contracts to minimize its exposure
to  foreign  currency  exchange  fluctuations  and  accounts  for  these  derivatives  in  accordance  with
SFAS  133,  Accounting  for  Derivative  Instruments  and  Hedging  Activities  as  described  more  fully  in
Note 3.

Accounts and Notes Receivable

Trade accounts receivable are recorded at net invoice value and notes receivable are recorded at
contractual value plus earned interest. Interest income on notes receivable is recognized according to
the  terms  of  each  related  agreement.  The  Company  considers  receivables  past  due  based  on  the
contractual  payment  terms.  The  Company  reviews  its  exposure  to  amounts  receivable  and  reserves
specific  amounts  if  collectibility  is  no  longer  reasonably  assured.  The  Company  also  reserves  a
percentage of the net trade receivable balance based on collection history. The Company re-evaluates
such reserves on a regular basis and adjusts its reserves as needed.

Concentrations of Risk

Cash  equivalents,  investments  and  accounts  receivable  are  financial  instruments  that  potentially
subject  the  Company  to  concentrations  of  credit  risk.  Most  of  the  Company’s  cash  and  cash
equivalents  as  of  January  2,  2005  are  deposited  with  financial  institutions  in  the  United  States  and
Company  policy  restricts  the  amount  of  credit  exposure  to  any  one  issuer  and  to  any  one  type  of
investment,  other  than  securities  issued  by  the  U.S.  Government.  The  Company  has  historically  not
experienced  significant  credit  losses  from  accounts  receivable.  The  Company  performs  a  regular
review of customer activity and associated credit risks and generally does not require collateral. The
Company  maintains  an  allowance  for  doubtful  accounts  based  upon  the  expected  collectibility  of
accounts receivable.

The  Company’s  products  require  customized  components  that  currently  are  available  from  a
limited number of sources. The Company obtains certain key components included in its products from
single vendors. No assurance can be given that these or other product components will be available in
sufficient quantities at acceptable costs in the future.

Approximately 52% of the Company’s revenues for the year ended January 2, 2005 were derived
from customers outside the United States. International sales entail a variety of risks, including currency
exchange fluctuations, longer payment cycles and greater difficulty in accounts receivable collection.
The  Company  is  also  subject  to  general  geopolitical  risks,  such  as  political,  social  and  economic
instability and changes in diplomatic and trade relations. The risks of international sales are mitigated
in part by the extent to which sales are geographically distributed and the Company’s foreign currency
hedging program.

F-9

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Inventories

Inventories  are  stated  at  the  lower  of  standard  cost  (which  approximates  actual  cost)  or  market.
Inventory includes raw materials and finished goods that may be used in the research and develop-
ment  process  and  such  items  are  expensed  as  consumed.  Provisions  for  slow  moving,  excess  and
obsolete  inventories  are  provided  based  on  product  life  cycle  and  development  plans,  product
expiration and quality issues, historical experience and inventory levels.

Property and Equipment

Property and equipment are stated at cost, subject to review of impairment, and depreciated over
the  estimated  useful  lives  of  the  assets  (generally  three  to  seven  years  for  equipment)  using  the
straight-line  method.  Amortization  of  leasehold  improvements  is  computed  over  the  shorter  of  the
lease term or the estimated useful life of the related assets.

Intangible Assets

Intangible  assets  consist  of  license  agreements  and  acquired  technology.  In  accordance  with
Accounting  Principles  Board  (‘‘APB’’)  Opinion  No.  17,  Accounting  for  Intangible  Assets,  intangible
assets are recorded at cost. The rights related to one of the license agreements are amortized over its
estimated  useful  life  (five  years)  and  will  be  fully  amortized  in  fiscal  year  2008.  The  rights  related  to
other license agreements are amortized based on sales of related product and are expected to be fully
amortized  by  the  end  of  fiscal  2005.  The  cost  of  these  license  agreements  was  $844,450  and  the
Company has amortized $493,333 through January 2, 2005. Amortization expense related to license
agreements for the years ending January 2, 2005, December 28, 2003 and December 29, 2002 was
$300,000, $185,000 and $8,333, respectively.

Long-Lived Assets

In  accordance  with  SFAS  No.  144,  Accounting  for  the  Impairment  or  Disposal  of  Long-Lived
Assets,  if  indicators  of  impairment  exist,  the  Company  annually  assesses  the  recoverability  of  the
affected long-lived assets by determining whether the carrying value of such assets can be recovered
through undiscounted future operating cash flows. If impairment is indicated, the Company measures
the future discounted cash flows associated with the use of the asset and adjusts the value of the asset
accordingly. While the Company’s current and historical operating and cash flow losses are indicators
of impairment, the Company believes the future cash flows to be received from the long-lived assets
recorded at January 2, 2005 will exceed the assets’ carrying value, and accordingly the Company has
not recognized any impairment losses through January 2, 2005.

Reserve for Product Warranties

The  Company  generally  provides  a  one  year  warranty  on  genotyping  and  gene  expression
systems. At the time revenue is recognized, the Company establishes an accrual for estimated warranty
expenses associated with system sales. This expense is recorded as a component of cost of revenue.

F-10

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Revenue Recognition

The  Company  records  revenue  in  accordance  with  the  guidelines  established  by  SEC  Staff
Accounting  Bulletin  No.  104  (‘‘SAB  104’’).  Under  SAB  104,  revenue  cannot  be  recorded  until  all  the
following  criteria  are  met:  persuasive  evidence  of  an  arrangement  exists;  delivery  has  occurred  or
services have been rendered; the seller’s price to the buyer is fixed or determinable; and collectibility is
reasonably  assured.  Product  revenue  consists  of  sales  of  oligonucleotides,  arrays,  assay  reagents,
genotyping  systems  and  gene  expression  systems.  Service  revenue  consists  of  revenue  received  for
performing SNP genotyping services and for extended warranty sales.

Revenue  for  product  sales  is  recognized  generally  upon  shipment  and  transfer  of  title  to  the
customer,  provided  no  significant  obligations  remain  and  collection  of  the  receivables  is  reasonably
assured. BeadLab revenue is recognized when earned, which is generally upon shipment, installation,
training and fulfillment of contractually defined acceptance criteria. Reserves are provided for antici-
pated  product  warranty  expenses  at  the  time  the  associated  revenue  is  recognized.  Revenue  for
extended  warranty  sales  is  recognized  ratably  over  the  term  of  the  extended  warranty.  Revenue  for
genotyping services is recognized generally at the time the genotyping analysis data is delivered to the
customer.  The  Company  has  been  awarded  $9.1  million  from  the  National  Institutes  of  Health  to
perform genotyping services in connection with the first phase of the International HapMap Project. A
portion of the revenue from this project is earned at the time the related costs are incurred while the
remainder of the revenue is earned upon the delivery of genotyping data. Research revenue consists of
amounts earned under research agreements with government grants, which is recognized in the period
during which the related costs are incurred. Some contracts entered into by the Company qualify as
multiple  element  arrangements  as  defined  by  Emerging  Issues  Task  Force  Issue  No.  00-21
(‘‘EITF 00-21’’), ‘‘Revenue Arrangements with Multiple Deliverables.’’

The  Company  recognizes  revenue  for  delivered  elements  only  when  the  delivered  element  has
stand-alone value, the fair values of undelivered elements are known, and there are no uncertainties
regarding customer acceptance. All revenues are recognized net of applicable allowances for returns
or discounts.

Shipping and Handling Expenses

Shipping and handling expenses are included in cost of product revenue and totaled $180,208,
$143,423 and $45,809 for the years ended January 2, 2005, December 28, 2003 and December 29,
2002, respectively.

F-11

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Research and Development

Expenditures relating to research and development are expensed in the period incurred.

Software Development Costs

The  Company  applies  Statement  of  Financial  Accounting  Standards  No.  86,  Accounting  for  the
Costs of Computer Software to be Sold, Leased or Otherwise Marketed, to capitalize costs related to
marketed software. To date, the Company has only marketed software that is an incidental component
to its SNP genotyping and gene expression systems. Accordingly, the Company capitalizes software
costs that are incurred after the later of 1) the establishment of technological feasibility of the software
or  2)  the  completion  of  all  research  and  development  activities  for  the  other  components  of  the
product. Through January 2, 2005, the period between achieving either of these milestones and the
general release date of the products has been very brief and software development costs thereafter
were not significant. Accordingly, the Company has not capitalized any qualifying software develop-
ment  costs  in  the  accompanying  consolidated  financial  statements.  The  costs  of  developing  routine
enhancements are expensed as research and development costs as incurred because of the short time
between the determination of technological feasibility and the date of general release of the related
products.

The  Company  applies  Statement  of  Position  (‘‘SOP’’)  No.  98-1,  Accounting  for  the  Costs  of
Computer Software Developed or Obtained for Internal Use. For the years ended January 2, 2005 and
December 28, 2003, the Company capitalized $26,650 and $93,693, respectively, in costs incurred to
acquire and develop software associated with the implementation of its Enterprise Resource Planning
and  Laboratory  Information  Management  systems.  These  costs  are  amortized  over  the  estimated
useful life of the software of seven years, beginning when the software is ready for its intended use.

Advertising Costs

The Company expenses advertising costs as incurred. Advertising costs were $792,508, $439,710
and  $267,338  for  the  years  ended  January  2,  2005,  December  28,  2003  and  December  29,  2002,
respectively.

Income Taxes

A deferred income tax asset or liability is computed for the expected future impact of differences
between the financial reporting and tax bases of assets and liabilities, as well as the expected future tax
benefit to be derived from tax loss and credit carryforwards. Deferred income tax expense is generally
the net change during the year in the deferred income tax asset or liability. Valuation allowances are
established  when  realizability  of  deferred  tax  assets  is  uncertain.  The  effect  of  tax  rate  changes  is
reflected in tax expense during the period in which such changes are enacted.

Foreign Currency Translation

The  functional  currencies  of  the  Company’s  wholly  owned  subsidiaries  are  their  respective  local
currencies. Accordingly, all balance sheet accounts of these operations are translated to U.S. dollars
using the exchange rates in effect at the balance sheet date, and revenues and expenses are translated
using  the  average  exchange  rates  in  effect  during  the  period.  The  gains  and  losses  from  foreign
currency  translation  of  these  subsidiaries’  financial  statements  are  recorded  directly  as  a  separate
component of stockholders’ equity under the caption ‘‘Accumulated other comprehensive income.’’

F-12

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Stock-Based Compensation

At  January  2,  2005,  the  Company  has  three  stock-based  employee  and  non-employee  director
compensation  plans,  which  are  described  more  fully  in  Note  6.  As  permitted  by  SFAS  No.  123,
Accounting for Stock-Based Compensation,the Company accounts for common stock options granted,
and restricted stock sold, to employees, founders and directors using the intrinsic value method and,
thus, recognizes no compensation expense for options granted, or restricted stock sold, with exercise
prices equal to or greater than the fair value of the Company’s common stock on the date of the grant.
The  Company  has  recorded  deferred  stock  compensation  related  to  certain  stock  options,  and
restricted stock, which were granted prior to the Company’s initial public offering with exercise prices
below  estimated  fair  value  (see  Note  6),  which  is  being  amortized  on  an  accelerated  amortization
methodology in accordance with Financial Accounting Standards Board Interpretation Number (‘‘FIN’’)
28.

Pro forma information regarding net loss is required by SFAS No. 123 and has been determined as
if the Company had accounted for its employee stock options and employee stock purchases under
the fair value method of that statement. The fair value for these options was estimated at the dates of
grant  using  the  fair  value  option  pricing  model  (Black  Scholes)  with  the  following  weighted-average
assumptions for 2004, 2003 and 2002:

Year Ended
January 2,
2005

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Weighted average risk-free interest rate *********
Expected dividend yield ***********************
Weighted average volatility ********************
Estimated life (in years) ************************
Weighted average fair value of options granted**

3.25%
0%
97%
5
$5.25

3.03%
0%
103%
5
$3.31

3.73%
0%
104%
5
$4.39

For  purposes  of  pro  forma  disclosures,  the  estimated  fair  value  of  the  options  is  amortized  to
expense  over  the  vesting  period.  The  Company’s  pro  forma  information  is  as  follows  (in  thousands
except per share amounts):

Net loss as reported **************************
Add: Stock-based compensation expense

recorded***********************************
Less: Assumed stock compensation expense*****
Pro forma net loss ****************************

Basic and Diluted net loss per share:
As reported **********************************
Pro forma ************************************

Year Ended
January 2,
2005

Year Ended
December 28,
2003

Year Ended
December 29,
2002

$ (6,225)

$(27,063)

$(40,331)

844
(9,217)

2,454
(8,576)

4,360
(8,479)

$(14,598)

$(33,185)

$(44,450)

$

$

(0.17)

(0.41)

$

$

(0.85)

(1.04)

$

$

(1.31)

(1.44)

The  pro  forma  effect  on  net  loss  presented  is  not  likely  to  be  representative  of  the  pro  forma
effects on reported net income or loss in future years because these amounts reflect less than five years
of vesting.

F-13

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

In  December  2004,  the  Financial  Accounting  Standards  Board  (FASB)  issued  FASB  Statement
No.  123  (revised  2004),  Share  Based  Payment  (SFAS  123R),  which  is  a  revision  of  FASB  Statement
No.  123,  Accounting  for  Stock-Based  Compensation  (SFAS  123).  This  statement  supercedes  APB
Opinion 25, Accounting for Stock Issued to Employees (APB 25), and amends FASB Statement No. 95,
Statement of Cash Flows. Generally, the approach in SFAS 123R is similar to the approach described
in SFAS 123; however, SFAS 123R requires all share-based payments to employees, including grants of
employee  stock  options,  to  be  recognized  in  the  income  statement  based  on  their  fair  values.  Pro
forma disclosure is no longer an alternative.

SFAS  123R  permits  companies  to  adopt  its  requirements  using  either  a  ‘‘modified  prospective’’
method or a ‘‘modified retrospective’’ method. Under the ‘‘modified prospective’’ method, compensa-
tion  cost  is  recognized  in  the  financial  statements  beginning  with  the  effective  date,  based  on  the
requirements  of  SFAS  123R  for  all  share-based  payments  granted  after  that  date,  and  based  on  the
requirements for SFAS 123 for all unvested awards granted prior to the effective date of SFAS 123R.
Under the ‘‘modified retrospective’’ method, the requirements are the same as under the ‘‘modified
prospective’’ method, but also permits companies to restate financial statements of previous periods
based on proforma disclosures made in accordance with SFAS 123. The Company currently utilizes the
Black-Scholes model to measure the fair value of stock options granted to employees under the pro
forma disclosure requirements if FAS 123. While SFAS 123R permits companies to continue to use such
model,  it  also  permits  the  use  of  a  ‘‘lattice’’  model.  The  Company  has  not  yet  determined  which
method or model it will use to measure the fair value of employee stock options under the adoption for
SFAS 123R. The new standard is effective for periods beginning after June 15, 2005, and the Company
expects to adopt SFAS 123R on July 4, 2005.

The Company currently accounts for share-based payments to employees using APB 25’s intrinsic
value method and, as such, recognizes no compensation cost for employee stock options granted with
exercise prices equal to or greater than the fair value of the Company’s common stock on the date of
the  grant.  Accordingly,  the  adoption  of  SFAS  123R’s  fair  value  method  is  expected  to  result  in
significant non-cash charges which will increase the Company’s reported operating expenses, however,
it will have no impact on its cash flows. The impact of adoption of SFAS 123R cannot be predicted at
this time because it will depend on the level of share-based payments granted in the future and the
model the Company chooses to use. However, had the Company adopted SFAS 123R in prior periods,
the  impact  of  that  standard  would  have  approximated  the  impact  of  SFAS  123  as  described  in  the
disclosure of pro forma net income and earnings above.

Deferred  compensation  for  options  granted,  and  restricted  stock  sold,  to  consultants  has  been
determined in accordance with SFAS No. 123 and Emerging Issues Task Force 96-18 as the fair value of
the consideration received or the fair value of the equity instruments issued, whichever is more reliably
measured.  Deferred  charges  for  options  granted,  and  restricted  stock  sold,  to  consultants  are
periodically remeasured as the underlying options vest.

Comprehensive Loss

Comprehensive loss is comprised of net loss and other comprehensive loss. Other comprehensive
loss includes unrealized gains and losses on the Company’s available-for-sale securities, changes in the
fair value of derivatives designated as effective as cash flow hedges, and foreign currency translation
adjustments. The Company has disclosed comprehensive loss as a component of stockholders’ equity.

F-14

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

The components of accumulated other comprehensive loss are as follows (in thousands):

Year Ended
January 2,
2005

Year Ended
December 28,
2003

Foreign currency translation adjustments **********************
Unrealized loss on available-for-sale securities *****************
Unrealized loss on cash flow hedges *************************
Accumulated other comprehensive loss ***********************

$171
(29)
(46)

$ 96

$ 60
275
—

$335

Net Loss per Share

Basic  and  diluted  net  loss  per  common  share  are  presented  in  conformity  with  SFAS  No.  128,
Earnings per Share, for all periods presented. In accordance with SFAS No. 128, basic and net loss per
share is computed using the weighted-average number of shares of common stock outstanding during
the period, less shares subject to repurchase. Diluted net loss per share is typically computed using the
weighted  average  number  of  common  and  dilutive  common  equivalent  shares  from  stock  options
using the treasury stock method. However, for all periods presented, diluted net loss per share is the
same as basic net loss per share because the Company reported a net loss and therefore the inclusion
of weighted average shares of common stock issuable upon the exercise of stock options would be
antidilutive.

Weighted-average shares outstanding **********
Less: Weighted-average shares of common stock
subject to repurchase ***********************

Weighted-average shares used in computing net
loss per share, basic and diluted *************

Year Ended
January 2,
2005

Year Ended
December 28,
2003

(In thousands)

Year Ended
December 29,
2002

36,165

32,733

32,390

(320)

(808)

(1,500)

35,845

31,925

30,890

The  total  number  of  shares  excluded  from  the  calculation  of  diluted  net  loss  per  share,  prior  to
application  of  the  treasury  stock  method  for  options  and  warrants,  was  6,360,023,  5,809,649  and
5,556,455  for  the  years  ended  January  2,  2005,  December  28,  2003  and  December  29,  2002,
respectively.

2. Balance Sheet Account Details

Investments, including restricted investments, consist of the following (in thousands):

Amortized
Cost

Gross
Unrealized Gain

Gross
Unrealized Loss

Market Value

January 2, 2005

Restricted corporate debt

securities ******************
Total ********************

$12,134

$12,134

$—

$—

$(29)

$(29)

$12,105

$12,105

F-15

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

December 28, 2003

Amortized
Cost

Gross
Unrealized Gain

Gross
Unrealized Loss

Market Value

US Treasury securities *********
Corporate debt securities *****

Restricted corporate debt

securities ******************
Total ********************

$ 6,340
13,480

19,820

12,413

$32,233

$253
244

497

—

$497

$ —
—

—

(222)

$(222)

$ 6,593
13,724

20,317

12,191

$32,508

As of January 2, 2005, all investments mature within one year.

Accounts receivable consist of the following (in thousands):

Accounts receivable from product and service sales *************
Notes receivable from product sales***************************
Accounts receivable from government grants*******************
Other receivables *******************************************

Allowance for doubtful accounts ******************************
Total ***************************************************

Inventory consists of the following (in thousands):

January 2,
2005

December 28,
2003

$11,182
464
108
283

12,037
(146)

$4,388
—
260
79

4,727
(178)

$11,891

$4,549

January 2,
2005

December 28,
2003

Raw materials ***********************************************
Work in process *********************************************
Finished goods *********************************************
Total ***************************************************

$1,487
1,714
606

$3,807

$ 829
931
262

$2,022

Property and equipment consist of the following (in thousands):

January 2,
2005

December 28,
2003

Land ******************************************************* $
Buildings ***************************************************
Leasehold improvements*************************************
Laboratory and manufacturing equipment**********************
Computer equipment and software ***************************
Furniture and fixtures ****************************************

—
—
347
11,067
6,116
2,095

Accumulated depreciation and amortization ********************

19,625
(11,051)
Total *************************************************** $ 8,574

$ 10,361
29,479
174
9,221
5,130
1,966

56,331
(10,554)

$ 45,777

F-16

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Depreciation  expense  was  $3.7  million,  $4.4  million  and  $4.5  million  for  the  years  ended

January 2, 2005, December 28, 2003 and December 29, 2002, respectively.

Accrued liabilities consist of the following (in thousands):

January 2,
2005

December 28,
2003

Compensation **********************************************
Professional fees ********************************************
Taxes ******************************************************
Reserve for product warranties********************************
Customer deposits ******************************************
Short-term deferred revenue *********************************
Short-term deferred gain on sale of building *******************
Other ******************************************************
Total ***************************************************

$ 3,798
1,488
928
577
1,671
915
375
655

$10,407

$2,608
1,437
523
230
253
—
—
489

$5,540

3. Derivative Financial Instruments

SFAS  No.  133,  Accounting  for  Derivative  Instruments  and  Hedging  Activities,  requires  that  all
derivatives  be  recognized  on  the  balance  sheet  at  their  fair  value.  Changes  in  the  fair  value  of
derivatives are recorded each period in current earnings or other comprehensive income, depending
on whether a derivative is designated as part of a hedge transaction and, if it is, the type of hedge
transaction. We assess, both at its inception and on an on-going basis, whether the derivatives that are
used  in  hedging  transactions  are  highly  effective  in  offsetting  the  changes  in  cash  flows  of  hedged
items. We also assess hedge ineffectiveness on a quarterly basis and record the gain or loss related to
the ineffective portion to current earnings to the extent significant.

The  Company  has  a  foreign  exchange  hedging  program  principally  designed  to  mitigate  the
potential impact due to changes in foreign currency exchange rates. The Company does not hold any
derivative  financial  instruments  for  trading  or  speculative  purposes.  The  Company  primarily  uses
forward exchange contracts to hedge foreign currency exposures and they generally have terms of one
year or less. These contracts have been designated as cash flow hedges and accordingly, to the extent
effective,  any  unrealized  gains  or  losses  on  these  foreign  currency  forward  contracts  are  reported  in
other comprehensive income. Realized gains and losses for the effective portion are recognized with
the  underlying  hedge  transaction.  The  notional  settlement  amount  of  the  foreign  currency  forward
contracts  outstanding  at  January  2,  2005  was  approximately  $4.0  million.  These  contracts  had  a  fair
value of approximately $249,443 and were included in other current liabilities at January 2, 2005.

For the year ended January 2, 2005, there were no amounts recognized in earnings due to hedge
ineffectiveness and we settled foreign exchange contracts of $283,721. The Company did not hold any
derivative financial instruments prior to fiscal 2004.

4. Warranties and Maintenance Contracts

The  Company  generally  provides  a  one  year  warranty  on  genotyping  and  gene  expression
systems. At the time revenue is recognized, the Company establishes an accrual for estimated warranty
expenses associated with system sales. This expense is recorded as a component of cost of product
revenue. Estimated warranty expenses associated with extended maintenance contracts are recorded
as cost of revenue ratably over the term of the maintenance contract.

F-17

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Changes in the Company’s warranty liability during the two years ended January 2, 2005 are as

follows (in thousands):

Balance at December 29, 2002***********************************************
Additions charged to cost of revenue *****************************************
Balance at December 28, 2003***********************************************
Additions charged to cost of revenue *****************************************
Repairs and replacements ***************************************************
Balance at January 2, 2005 **************************************************

$ —
230

230
976
(629)

$ 577

5. Commitments and Long-term Debt

Building Loan

In July 2000, the Company entered into a 10-year lease to rent space in two newly constructed
buildings  in  San  Diego  that  are  now  occupied  by  the  Company.  That  lease  contained  an  option  to
purchase the buildings together with certain adjacent land that has been approved for construction of
an additional building. The Company exercised that option and purchased the properties in January
2002 and assumed a $26 million, 10-year mortgage on the property at a fixed interest rate of 8.36%.
The  Company  made  monthly  payments  of  $208,974,  representing  interest  and  principal,  through
August  2004.  Interest  expense  was  $1.4  million,  $2.2  million  and  $2.3  million  for  the  years  ended
January 2, 2005, December 28, 2003 and December 29, 2002, respectively.

In June, 2004, the Company entered into a conditional agreement to sell its land and buildings for
$42.0 million and to lease back such property for an initial term of ten years. The sale was completed in
August 2004 at which time the lease was signed. After the repayment of the remaining $25.2 million
debt  and  other  related  transaction  expenses,  the  Company  received  $15.5  million  in  net  cash
proceeds. The Company removed the land and net book value of the buildings of $36.9 million from its
balance sheet, deferred the resulting $3.7 million gain on the sale of the property, and is amortizing
the deferred gain over the ten year lease term in accordance with SFAS 13, Accounting for Leases.

The Company leased a portion of the space to a tenant under a lease which expired in June 2004.
Rental income was recorded as an offset to the Company’s facility costs. Rental income was $409,517,
$695,282 and $679,468 for the years ended January 2, 2005, December 28, 2003, and December 29,
2002, respectively.

Capital Leases

In  April  2000,  the  Company  entered  into  a  $3,000,000  loan  arrangement  to  be  used  at  its
discretion to finance purchases of capital equipment. The loan was secured by the capital equipment
financed.  As  of  January  2,  2005,  all  loan  payments  were  made,  the  underlying  equipment  was
purchased  and  the  loan  arrangement  was  closed.  Cost  and  accumulated  depreciation  of  equipment
under capital leases at December 28, 2003 was $1,287,789 and $1,060,278, respectively. Depreciation
of equipment under capital leases was included in depreciation expense. Interest expense related to
capital leases was $10,500, $56,661 and $97,265 for the years ended January 2, 2005, December 28,
2003 and December 29, 2002, respectively.

F-18

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Operating Leases

In August 2004, the Company entered into a ten year lease for its San Diego facility after the land
and  building  were  sold  (as  discussed  above).  Under  the  terms  of  the  lease,  the  Company  made  a
$1.9 million security deposit and is paying monthly rent of $318,643 for the first year with an annual
increase  of  3%  in  each  subsequent  year.  The  lease  contains  an  option  to  renew  for  three  additional
periods  of  five  years  each.  The  Company  also  leases  office  space  under  non-cancelable  operating
leases that expire at various times through January 2007. These leases contain renewal options ranging
from 2 to 3 years. At January 2, 2005, annual future minimum payments under these operating leases
are as follows (in thousands):

2005 ********************************************************************
2006 ********************************************************************
2007 ********************************************************************
2008 ********************************************************************
2009 ********************************************************************
2010 and thereafter*******************************************************
Total ****************************************************************

$ 4,251
4,371
4,131
4,225
4,351
21,896

$43,225

Rent  expense,  net  of  amortization  of  the  deferred  gain  on  sale  of  property,  was  $1,794,234,
$238,065 and $141,361 for the years ended January 2, 2005, December 28, 2003 and December 29,
2002, respectively.

6. Stockholders’ Equity

Common stock

As  of  January  2,  2005,  the  Company  had  38,120,685  shares  of  common  stock  outstanding,  of
which  4,844,072  shares  were  sold  to  employees  and  consultants  subject  to  restricted  stock  agree-
ments.  The  restricted  common  shares  vest  in  accordance  with  the  provisions  of  the  agreements,
generally over five years. All unvested shares are subject to repurchase by the Company at the original
purchase price. As of January 2, 2005, 154,003 shares of common stock were subject to repurchase.

Stock Options

In June 2000, the Company’s board of directors and stockholders adopted the 2000 Stock Plan.
The 2000 Stock Plan amended and restated the 1998 Incentive Stock Plan and increased the shares
reserved for issuance by 4,000,000 shares. In addition, the 2000 Stock Plan provides for an automatic
annual  increase  in  the  shares  reserved  for  issuance  by  the  lesser  of  5%  of  outstanding  shares  of  the
Company’s common stock on the last day of the immediately preceding fiscal year, 1,500,000 shares
or such lesser amount as determined by the Company’s board of directors.

In  1998,  the  Company  adopted  the  1998  Incentive  Stock  Plan  (the  ‘‘Plan’’)  and  had  reserved
5,750,000  shares  of  common  stock  for  grants  under  the  Plan.  The  Plan  provided  for  the  grant  of
incentive and nonstatutory stock options, stock bonuses and rights to purchase stock to employees,
directors or consultants of the Company. The Plan provided that incentive stock options to be granted
only to employees at no less than the fair value of the Company’s common stock, as determined by the
board of directors at the date of the grant. Options generally vest 20% one year from the date of grant
and ratably each month thereafter for a period of 48 months and expire ten years from date of grant. In
December 1999, the Company modified the plan to allow for acceleration of vesting in the event of an
acquisition or merger.

F-19

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

A summary of the Company’s stock option activity from December 30, 2001 through January 2,

2005 follows:

Options

Weighted-
Average
Exercise Price

Outstanding at December 30, 2001 ************************** 3,380,796
Granted *************************************************** 1,467,500
Exercised **************************************************
(137,727)
Cancelled *************************************************
(287,788)

Outstanding at December 29, 2002 ************************** 4,422,781
Granted *************************************************** 1,241,175
Exercised **************************************************
(102,590)
Cancelled *************************************************
(331,492)

Outstanding at December 28, 2003 ************************** 5,229,874
Granted *************************************************** 1,453,400
Exercised **************************************************
(139,768)
Cancelled *************************************************
(337,486)

Outstanding at January 2, 2005 ****************************** 6,206,020

$ 8.97
$ 5.62
$ 0.46
$11.81

$ 7.94
$ 3.31
$ 1.25
$ 8.36

$ 6.95
$ 7.08
$ 1.98
$ 8.80

$ 6.99

At  January  2,  2005,  options  to  purchase  approximately  2,653,581  shares  were  exercisable  and

5,964,649 shares remain available for future grant.

Following is a further breakdown of the options outstanding as of January 2, 2005:

Range of
Exercise Prices

Options
Outstanding

$0.03 - 3.06
$3.20 - 4.64
$4.87 - 5.99
$6.00 - 7.90
$7.94 - 11.55
$11.56 - 45.00

1,046,528
1,084,251
1,225,679
1,312,994
1,043,316
493,252

6,206,020

Weighted
Average
Remaining
Life in Years

Weighted
Average
Exercise Price

Options
Exercisable

Weighted
Average
Exercise Price
of Options
Exercisable

7.05
8.08
7.54
8.56
6.72
5.94

7.50

$ 2.00
$ 4.14
$ 5.78
$ 7.27
$ 9.11
$21.64

$ 6.99

557,690
393,768
315,639
339,664
650,475
396,345

2,653,581

$ 1.43
$ 4.15
$ 5.63
$ 7.05
$ 9.14
$21.92

$ 8.00

F-20

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

2000 Employee Stock Purchase Plan

In  February  2000,  the  board  of  directors  and  stockholders  adopted  the  2000  Employee  Stock
Purchase Plan (the ‘‘Purchase Plan’’). A total of 2,445,547 shares of the Company’s common stock have
been reserved for issuance under the Purchase Plan. The Purchase Plan permits eligible employees to
purchase  common  stock  at  a  discount,  but  only  through  payroll  deductions,  during  defined  offering
periods.  The  price  at  which  stock  is  purchased  under  the  Purchase  Plan  is  equal  to  85%  of  the  fair
market value of the common stock on the first or last day of the offering period, whichever is lower. The
initial  offering  period  commenced  in  July  2000.  In  addition,  the  Purchase  Plan  provides  for  annual
increases of shares available for issuance under the Purchase Plan beginning with fiscal 2001. 585,855,
304,714 and 128,721 shares were issued under the 2000 Employee Stock Purchase Plan during fiscal
2004, 2003 and 2002, respectively.

Deferred Stock Compensation

Since  the  inception  of  the  Company,  in  connection  with  the  grant  of  certain  stock  options  and
sales of restricted stock to employees, founders and directors through July 25, 2000, the Company has
recorded  deferred  stock  compensation  totaling  approximately  $17.6  million,  representing  the  differ-
ence between the exercise or purchase price and the fair value of the Company’s common stock as
estimated  by  the  Company’s  management  for  financial  reporting  purposes  on  the  date  such  stock
options were granted or restricted common stock was sold. Deferred compensation is included as a
reduction  of  stockholders’  equity  and  is  being  amortized  to  expense  over  the  vesting  period  of  the
options  and  restricted  stock.  During  the  years  ended  January  2,  2005,  December  28,  2003  and
December 29, 2002, the Company recorded amortization of deferred stock compensation expense of
approximately $0.8 million, $2.5 million and $4.4 million, respectively.

Shares Reserved for Future Issuance

At  January  2,  2005,  the  Company  has  reserved  shares  of  common  stock  for  future  issuance  as

follows (in thousands):

2000 Stock Plan ***********************************************************
2000 Employee Stock Purchase Plan *****************************************

12,171
1,364

13,535

F-21

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Stockholder Rights Plan

On  May  3,  2001,  the  Board  of  Directors  of  the  Company  declared  a  dividend  of  one  preferred
share  purchase  right  (a  ‘‘Right’’)  for  each  outstanding  share  of  common  stock  of  the  Company.  The
dividend was payable on May 14, 2001 (the ‘‘Record Date’’) to the stockholders of record on that date.
Each Right entitles the registered holder to purchase from the Company one unit consisting of one-
thousandth of a share of its Series A Junior Participating Preferred Stock at a price of $100 per unit. The
Rights will be exercisable if a person or group hereafter acquires beneficial ownership of 15% or more
of  the  outstanding  common  stock  of  the  Company  or  announces  an  offer  for  15%  or  more  of  the
outstanding common stock. If a person or group acquires 15% or more of the outstanding common
stock of the Company, each Right will entitle its holder to purchase, at the exercise price of the right, a
number of shares of common stock having a market value of two times the exercise price of the right. If
the Company is acquired in a merger or other business combination transaction after a person acquires
15%  or  more  of  the  Company’s  common  stock,  each  Right  will  entitle  its  holder  to  purchase,  at  the
Right’s then-current exercise price, a number of common shares of the acquiring company which at the
time of such transaction have a market value of two times the exercise price of the right. The Board of
Directors will be entitled to redeem the Rights at a price of $0.01 per Right at any time before any such
person  acquires  beneficial  ownership  of  15%  or  more  of  the  outstanding  common  stock.  The  rights
expire on May 14, 2011 unless such date is extended or the rights are earlier redeemed or exchanged
by the Company.

7. Legal Proceedings

The Company has incurred substantial costs in defending itself against patent infringement claims,
and expects to devote substantial financial and managerial resources to protect its intellectual property
and to defend against the claims described below as well as any future claims asserted against it.

Termination-of-Employment Lawsuit

In June 2002, the Company recorded a $7.7 million charge to cover total damages and estimated
expenses awarded by a jury related to a termination-of-employment lawsuit. The Company appealed
the  decision,  and  in  December  2004,  the  Fourth  Appellate  District  Court  of  Appeal,  in  San  Diego,
California,  reduced  the  amount  of  the  award.  The  Company  recorded  interest  expense  during  the
appeal based on the statutory rate. For the years ended January 2, 2005 and December 28, 2003, the
Company recorded litigation expense of $567,000 and $756,000, respectively, for interest. As a result
of the revised judgment, the Company reduced the $9.2 million liability recorded on its balance sheet
to  $5.9  million  and  recorded  a  gain  of  $3.3  million  as  a  litigation  judgment  in  the  statement  of
operations for the year ended January  2, 2005.

As a result of the Company’s decision to appeal the ruling, the Company filed a surety bond with
the court equal to 1.5 times the judgment amount or approximately $11.3 million. Under the terms of
the bond, the Company is required to maintain a letter of credit for 90% of the bond amount to secure
the bond. Further, the Company was required to deposit approximately $12.5 million of marketable
securities as collateral for the letter of credit and accordingly, these funds were restricted from use for
general  corporate  purposes  until  the  appeal  process  was  completed.  A  judgment  was  rendered  in
December 2004 and payment was made in early 2005 at which time the restricted funds, recorded as
restricted investments, were released.

F-22

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Litigation with Applera Corporation’s Applied Biosystems Group

In  November  1999,  the  Company  entered  into  a  joint  development  agreement  with  Applied
Biosystems  Group  (‘‘Applied  Biosystems’’),  an  operating  group  of  Applera  Corporation  (‘‘Applera’’),
under which the companies would jointly develop a SNP genotyping system that would combine the
Company’s BeadArray technology with Applied Biosystems’ assay chemistry and scanner technology.
In  conjunction  with  the  agreement,  Applied  Biosystems  agreed  to  provide  the  Company  with  non-
refundable  research  and  development  support  of  $10.0  million,  all  of  which  was  provided  by
December 2001. As of December 28, 2003 this amount was recorded as a liability on the Company’s
balance sheet.

In December 2002, Applied Biosystems initiated a patent infringement suit and sought to compel
arbitration of an alleged breach of the joint development agreement. In December 2002, the Company
filed a suit alleging breach of contract, breach of the implied covenant of good faith and fair dealing,
unfair competition and other allegations against Applied Biosystems in San Diego Superior Court, and
moved to prevent the arbitration of the joint development agreement sought by Applied Biosystems.
In January 2004, the Company notified Applied Biosystems that it was terminating the joint develop-
ment agreement.

In  August  2004,  the  Company  and  Applera  entered  into  a  settlement  and  cross-license  agree-
ment.  Under  the  terms  of  the  agreement,  the  Company  paid  Applera  a  one-time  payment  of
$8.5 million. The settlement agreement also provided for an exchange of royalty-free cross-licenses to
certain intellectual property rights, termination of the joint development agreement, dismissal of the
federal  patent  infringement  action  brought  by  Applied  Biosystems,  termination  of  the  arbitration
proceeding, and dismissal of the Company’s state court action against Applied Biosystems.

As  a  result  of  the  settlement,  the  Company  removed  the  $10.0  million  liability  from  its  balance
sheet, made a payment of $8.5 million to Applera and recorded a gain of $1.5 million as a litigation
settlement in the statement of operations for the year ended January 2, 2005.

Affymetrix Litigation

In  July  2004,  Affymetrix,  Inc.  (‘‘Affymetrix’’)  filed  a  complaint  in  the  U.S.  District  Court  for  the
District  of  Delaware  alleging  that  certain  of  the  Company’s  products  infringe  six  Affymetrix  patents.
The  suit  seeks  an  unspecified  amount  of  monetary  damages  and  a  judgment  enjoining  the  sale  of
products, if any, that are determined to be infringing these patents. In September 2004, the Company
filed  its  answer  and  counterclaims  to  Affymetrix’  complaint,  seeking  declaratory  judgments  from  the
court  that  it  does  not  infringe  the  Affymetrix  patents,  and  that  such  patents  are  invalid,  and  filed
counterclaims  against  Affymetrix  for  unfair  competition  and  interference  with  actual  and  prospective
economic advantage. The Company believes it has meritorious defenses against each of the infringe-
ment claims alleged by Affymetrix and intends to vigorously defend itself against this suit. However,
the  Company  cannot  be  sure  it  will  prevail  in  this  matter.  Any  unfavorable  determination,  and  in
particular, any significant cash amounts required to be paid by the Company or prohibition of the sale
of  the  Company’s  products  and  services,  could  result  in  a  material  adverse  effect  on  its  business,
financial condition and results of operations. While the parties have pending motions before the court,
no trial date has yet been set for this case.

F-23

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

8. Collaborative Agreements

International HapMap Project

The  Company  is  the  recipient  of  a  grant  from  the  National  Institutes  of  Health  covering  its
participation  in  the  first  phase  of  the  International  HapMap  Project,  which  is  a  $100  million,
internationally funded successor project to the Human Genome Project that will help identify a map of
genetic variations that may be used to perform disease-related research. The Company could receive
up to $9.1 million of funding for this project which covers basic research activities, the development of
SNP assays and the genotyping to be performed on those assays. As of January 2, 2005, the Company
had approximately $0.7 million  of  funding  remaining  related to  this  project which  is expected to be
received in early 2005.

Invitrogen Corporation

In December 2004, the Company entered into a strategic collaboration with Invitrogen Corpora-
tion. The collaboration is expected to expand the Company’s Oligator DNA synthesis technology and
combine that capability with Invitrogen’s sales, marketing and distribution channels. Under the terms
of the agreement, Invitrogen has agreed to pay the Company up to $3.4 million, which the Company
plans  to  invest  in  its  San  Diego  facility  to  enable  implementation  of  fourth-generation  Oligator
technology  and  extend  the  technology  into  tube-based  oligo  products.  In  addition,  the  agreement
provides  for  the  transfer  of  the  Company’s  Oligator  technology  into  two  Invitrogen  facilities  outside
North America. Profit from the sale of collaboration products will be divided equally between the two
companies.

9.

Income Taxes

The Company’s provision for income taxes for the years ended January 2, 2005 and December 28,
2003 consisted of $135,000 of income tax expense related to its foreign operations. This expense is
included with interest and other expense in the statement of operations.

At  January  2,  2005,  the  Company  has  federal  and  state  tax  net  operating  loss  carryforwards  of
approximately  $86.5  million  and  $39.1  million,  respectively.  The  federal  and  state  tax  loss  carryfor-
wards  will  begin  expiring  in  fiscal  year  2018  and  2006  respectively,  unless  previously  utilized.  The
Company  also  has  federal  and  state  research  and  development  tax  credit  carryforwards  of  approxi-
mately $3.1 million and $3.0 million, respectively, which will begin to expire in fiscal year 2018, unless
previously utilized.

Pursuant to Sections 382 and 383 of the Internal Revenue Code, annual use of the Company’s net
operating loss and credit carryforwards may be limited in the event of a cumulative ownership change
of more than 50 percentage points within a three-year period.

F-24

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

Significant  components  of  the  Company’s  deferred  tax  assets  as  of  January    2,  2005  and
December 28, 2003 are shown below (in thousands). A valuation allowance has been established as of
January 2, 2005 and December 28, 2003 to offset the net deferred tax assets, as realization of such
assets has not met the ‘‘more likely than not’’ threshold required under FAS 109.
January 2,
2005

December 28,
2003

Deferred tax assets:

Net operating loss carryforwards **************************** $ 32,161
Research and other credit carryforwards *********************
5,076
Advance payment from former collaborator ******************
—
Capitalized research and development **********************
1,857
Other ****************************************************
6,433
Total deferred tax assets *********************************
Valuation allowance for deferred tax assets*********************
Net deferred taxes ****************************************** $

45,527
(45,527)

—

$ 25,869
5,111
4,074
1,348
6,795

43,197
(43,197)

$

—

Deferred  tax  assets  of  approximately  $0.4  million  and  $0.2  million  at  January  2,  2005  and
December  28,  2003,  respectively,  resulted  from  the  exercise  of  employee  stock  options.  When
recognized, the tax benefit of these assets will be accounted for as a credit to additional paid-in capital
rather than a reduction of the income tax provision.

Reconciliation of the statutory federal income tax to the Company’s effective tax (in thousands):

Year Ended
January 2,
2005

Year Ended
December 28,
2003

Year Ended
December 29,
2002

Tax at federal statutory rate ********************
State, net of federal benefit********************
Research and development credits *************
Change in valuation allowance *****************
Permanent differences*************************
Other ***************************************
Tax expense**********************************

$(2,179)
(336)
34
2,330
(264)
550

$ 135

$ (9,472)
(1,434)
(1,374)
12,130
738
(588)

$

—

$(14,116)
(2,115)
(1,239)
14,241
1,234
1,995

$

—

On October 22, 2004, the President signed the American Jobs Creation Act of 2004 (the ‘‘Act’’).
The Act creates a temporary incentive for U.S. corporations to repatriate accumulated income earned
abroad by providing an 85 percent dividends received deduction for certain dividends from controlled
foreign corporations. The deduction is subject to a number of limitations and, as of today, uncertainty
remains  as  to  how  to  interpret  numerous  provisions  in  the  Act.  Based  on  our  analysis  of  the  Act,
although  not  yet  finalized,  it  is  possible  that  under  the  repatriation  provision  of  the  Act  we  may
repatriate some amount of our undistributed foreign earnings. We expect to finalize our assessment in
2005.

10. Retirement Plan

The  Company  has  a  401(k)  savings  plan  covering  substantially  all  of  its  employees.  Company
contributions  to  the  plan  are  discretionary  and  no  such  contributions  were  made  during  the  years
ended January 2, 2005, December 28, 2003 and December 29, 2002.

F-25

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

11. Segment Information, Geographic Data and Significant Customers

The  Company  has  determined  that,  in  accordance  with  SFAS  No.  131,  Disclosures  about
Segments  of  an  Enterprise  and  Related  Information  it  operates  in  one  segment  as  it  only  reports
operating  results  on  an  aggregate  basis  to  chief  operating  decision  makers  of  the  Company.  The
Company had sales in the following regions for the years ended January 2, 2005, December 28, 2003
and December 29, 2002 (in thousands):

January 2,
2005

December 28,
2003

December 29,
2002

United States *********************************
Europe ***************************************
Asia ******************************************
Other ****************************************
Total ***************************************

$24,166
12,528
9,703
4,186

$13,666
5,909
5,557
2,903

$50,583

$28,035

$ 8,731
1,047
246
16

$10,040

Exclusive  of  revenue  recorded  from  the  National  Institutes  of  Health,  the  Company  had  one
customer  that  provided  approximately  14%  of  total  revenue  in  the  year  ended  January  2,  2005  and
approximately 18% of total revenue in the year ended December 28, 2003 and one other customer
that contributed approximately 22% of revenue in the year ended December 29, 2002. Revenue from
the National Institutes of Health accounted for approximately 13%, 21% and 19% of total revenue for
the years ended January 2, 2005, December 28, 2003 and December 29, 2002, respectively.

12. Subsequent Events

In  February  2005,  the  Company  signed  a  definitive  agreement  and  plan  of  merger  with  CyVera
Corporation,  a  privately-held  Connecticut-based  company,  pursuant  to  which  CyVera  will  become  a
wholly-owned  subsidiary  of  the  Company.  CyVera’s  technology  is  highly  complementary  to  our
portfolio of products and services and upon closing of the transaction will become an integral part of
our  technology.  The  aggregate  consideration  for  the  transaction  is  $17.5  million,  consisting  of
approximately 1.5 million shares of the Company’s common stock and the payment of approximately
$2.3 million of CyVera’s liabilities at the closing. The closing is subject to customary conditions and is
expected  to  occur  by  the  end  of  March  2005.  The  Company  expects  the  first  products  based  on
CyVera’s technology to be available in the second half in 2006.

F-26

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

ILLUMINA, INC.

13. Quarterly Financial Information (unaudited)

The  following  financial  information  reflects  all  normal  recurring  adjustments,  except  as  noted
below, which are, in the opinion of management, necessary for a fair statement of the results of interim
periods. Summarized quarterly data for fiscal 2004 and 2003 are as follows (in thousands except per
share data):

First Quarter

Second Quarter

Third Quarter

Fourth Quarter

2004:

Total revenues *************
Total cost of revenue *******
Net income (loss) **********
Historical net loss per share,
basic********************
Historical net loss per share,
diluted ******************

2003:

Total revenues *************
Total cost of revenue *******
Net loss *******************
Historical net loss per share,
basic and diluted*********

$10,803
2,802
(3,931)

(0.12)

(0.12)

$ 4,276
1,910
(8,960)

$11,486
3,067
(3,516)

(0.10)

(0.10)

$ 4,769
2,026
(8,592)

$13,512
3,517
(2,026)

(0.05)

(0.05)

$ 8,249
2,681
(5,511)

$14,782
3,873
3,248

0.09

0.08

$10,741
3,420
(4,000)

(0.28)

(0.27)

(0.17)

(0.12)

In the third quarter of 2004 the Company recorded a $1.5 million reduction in expense for a legal
settlement  and  in  the  fourth  quarter  of  2004,  the  Company  recorded  a  $3.3  million  reduction  in
expense related to the reduction of a legal judgment (see Note 7).

F-27

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
FOR THE THREE YEARS ENDED JANUARY 2, 2005

Balance at December 30, 2001 ************************
Charged to expense********************************
Utilizations*****************************************
Balance at December 29, 2002 ************************
Charged to expense********************************
Utilizations*****************************************
Balance at December 28, 2003 ************************
Charged to expense********************************
Utilizations*****************************************
Balance at January 2, 2005****************************

Allowance
for Doubtful
Accounts

Reserve for
Obsolete
and
Excess Inventory
(Thousands)

Reserve
for Product
Warranty

$ 32
115
(2)

145
118
(85)

178
49
(81)

$ —
73
—

73
466
(73)

466
543
(407)

$ —
—
—

—
230
—

230
976
(629)

$146

$ 602

$ 577

F-28

06414_AR_Cvr_20  5/6/05  12:50 PM  Page 2

Illumina is keeping customers on the 
leading edge of research by enabling better
performance, higher value, and multiple
applications on a single microarray platform. 

4 QUARTERS OF SEQUENTIAL REVENUE GROWTH (IN MILLIONS OF DOLLARS)

14 QUARTERS OF SEQUENTIAL REVENUE GROWTH (IN MILLIONS OF DOLLARS)

$14.8

$10.7

$10.8

$11.5

$13.5

7

$0.8

$1.3

$1.9

$3.0

$8.2

$3.9

$4.3

$4.8

$14.8

$13.5

$10.7

$10.8

$11.5

$8.2

Q4
2001

Q1
2002

Q2
2002

Q3
2002

Q4
2002

Q1
2003

Q2
2003

Q3
2003

1

$0.7

$0.8

$1.3

$1.9

Q4
2003

$3.0

$3.9

Q1
2004

$4.3

Q2
2004

$4.8

Q3
2004

Q4
2004

Q3
2001

Q4
2001

Q1
2002

Q2
2002

Q3
2002

Q4
2002

Q1
2003

Q2
2003

Q3
2003

Q4
2003

Q1
2004

Q2
2004

Q3
2004

Q4
2004

Corporate Directory

Corporate Information

BOARD OF DIRECTORS
Jay T. Flatley
President, Chief Executive Officer and 
Acting Chief Financial Officer
Illumina

CORPORATE HEADQUARTERS
9885 Towne Centre Drive
San Diego, CA 92121
+1 858.202.4500
www.illumina.com

INDEPENDENT ACCOUNTANTS
Ernst & Young LLP
San Diego, CA 92101

John R. Stuelpnagel, D.V.M.
Senior Vice President and Chief Operating Officer
Illumina

Daniel M. Bradbury
Chief Operating Officer
Amylin Pharmaceuticals

Karin Eastham
Executive Vice President and Chief Operating
Officer
The Burnham Institute

Paul Grint, M.D.
Senior Vice President and Chief Medical Officer
Zephyr Sciences, Inc.

William H. Rastetter, Ph.D.
Executive Chairman 
Biogen Idec

David R. Walt, Ph.D.
Robinson Professor of Chemistry
Tufts University

EXECUTIVE OFFICERS
Jay T. Flatley
President, Chief Executive Officer and 
Acting Chief Financial Officer

John R. Stuelpnagel, D.V.M.
Senior Vice President and Chief Operating Officer

David L. Barker, Ph.D.
Vice President and Chief Scientific Officer

Paulette D. Cabral
Vice President of Human Resources

David C. Douglas
Vice President of Manufacturing

Noemi C. Espinosa
Vice President of Intellectual Property

Scott D. Kahn, Ph.D.
Vice President and Chief Information Officer

Robert C. Kain
Vice President of Engineering

Alan Kersey
Vice President and Site General Manager

Tristan Orpin
Vice President of Worldwide Sales

TRANSFER AGENT
EquiServe Trust Company N.A.
150 Royall Street
Canton, MA 02121
+1 781.575.3400
www.equiserve.com

LEGAL COUNSEL
Heller Ehrman LLP
Menlo Park, CA 94025

FORM 10-K
Included with this report is a copy of the Company’s Form 10-K filed
with the Securities and Exchange Commission. Additional copies are
available by contacting Illumina’s Investor Relations Department.

www.illumina.com
investor@illumina.com
+1 858.202.4750

ANNUAL MEETING
The Company’s Annual Meeting of Stockholders will be held at the
Company’s corporate headquarters at 10:00 a.m. on June 28, 2005.

SELECTED COMMON STOCK DATA
The Company’s common stock, par value $.01, has been traded under
the symbol ILMN since July 28, 2000 on the NASDAQ National Market.

As of May 2, 2005, there were approximately 312 record holders 
of the Company’s common stock. The Company has not paid any cash
dividends since its inception and does not anticipate paying any cash
dividends in the foreseeable future.

“Safe Harbor” Statement under the Private Securities Litigation
Reform Act 1995: this release may contain forward-looking state-
ments that involve risks and uncertainties. Among the important 
factors that could cause actual results to differ materially from 
those in any forward-looking statements are the costs and outcome
of Illumina’s litigation with Affymetrix, the Company’s ability to 
scale and integrate CyVera technology, the ability to further scale
oligo synthesis output and technology to satisfy market demand
deriving from the Company’s collaboration with Invitrogen, Illumina’s
ability to further develop and commercialize its Infinium assay and
BeadArray platform technologies, to deploy new gene expression
and genotyping products and applications for its platform technolo-
gy, to manufacture robust Sentrix® arrays and Oligator® oligonu-
cleotides, and other factors detailed in the Company’s filings with
the Securities and Exchange Commission including its recent filings
on Forms 10-K and 10-Q or in information disclosed in public confer-
ence calls, the date and time of which are released beforehand.
Illumina disclaims any intent or obligation to update these forward-
looking statements beyond the date of this release. 

© 2005, Illumina, Inc. All rights reserved. Illumina, BeadArray, Array of Arrays, Sentrix, GoldenGate, DASL, Infinium, Making Sense Out of Life and Oligator 
are trademarks of Illumina, Inc. Printed in the U.S.A. 070-2004-009.

06414_AR_Cvr_19  5/6/05  11:00 AM  Page 1

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T H E   L E A D I N G   E D G E   O F   G E N E T I C   A N A LY S I S

Illumina, Inc.
9885 Towne Centre Drive
San Diego, CA 92121
www.illumina.com

2004 Annual Report