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 ILLUMINA, INC.

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Roche's Offer to Acquire Illumina

Presentation to Investors March 2012





 
 
 

 
 
 

This presentation contains certain forward-looking statements. These
forward-looking statements may be identified by words such as 'believes',
'expects', 'anticipates', 'projects', 'intends', 'should', 'seeks',
'estimates', 'future' or similar expressions or by discussion of, among other
things, strategy, goals, plans or intentions. Various factors may cause actual
results to differ materially in the future from those reflected in
forward-looking statements contained in this presentation, among others: 1
pricing and product initiatives of competitors; 2 legislative and regulatory
developments and economic conditions; 3 delay or inability in obtaining
regulatory approvals or bringing products to market; 4 fluctuations in currency
exchange rates and general financial market conditions; 5 uncertainties in the
discovery, development or marketing of new products or new uses of existing
products, including without limitation negative results of clinical trials or
research projects, unexpected side-effects of pipeline or marketed products; 6
increased government pricing pressures; 7 interruptions in production; 8 loss
of or inability to obtain adequate protection for intellectual property rights;
9 litigation; 10 loss of key executives or other employees; and 11 adverse
publicity and news coverage.

Any statements regarding earnings per share growth is not a profit forecast and
should not be interpreted to mean that Roche's earnings or earnings per share
for this year or any subsequent period will necessarily match or exceed the
historical published earnings or earnings per share of Roche.

For marketed products discussed in this presentation, please see full
prescribing information on our website -- www.roche.com

All mentioned trademarks are legally protected. 2





 
 
 

 
 
 

Executive Summary

Offer Summary

Illumina Growth Perspectives

Illumina Share Price Perspectives Offer Price Rationale Next Steps

Conclusion 3





 
 
 

 
 
 

Executive Summary

Roche is increasing its all-cash offer to acquire Illumina to $51.00 per
share.

[] Offer is highly attractive, representing both full and fair value as well as
value certainty

-- Implies 1-day and 1-month average premiums to the unaffected price of 88%
and 84%, respectively and LTM revenue and EBITDA multiples of 6.5x and 21.6x,
respectively, all of which are higher than all precedent life science tools
transactions (1) (2)

[] Precedent life science tools transactions have median 1-day and 1-month
average premiums to the unaffected stock price of 33% and 37%, respectively and
LTM revenue and EBITDA multiples of 3.3x and 16.0x, respectively (3)

-- Implies a valuation multiple of 34.2x 2012E net income, which is higher than
all of the company's publicly traded peers (4)

[] Offer is being increased in response to dialogue with Illumina shareholders

-- In light of continued refusal by Illumina to engage in constructive
dialogue, Roche has increased its offer in an effort to conclude a negotiated
transaction with Illumina

-- Desire to engage in meaningful dialogue and conduct due diligence

-- By not engaging with Roche, Illumina reinforces the notion that its Board is
entrenched and not focused on shareholder value

-- Absent ability to interact with Illumina, Roche has no choice but to
continue to pursue a transaction unilaterally

Source: FactSet, Capital IQ, I/B/E/S consensus, Bloomberg.
(1) Premiums based on unaffected closing share price of $27.17 on 12/21/2011,
the day prior to market rumors about a potential acquisition of Illumina by
Roche.
(2) LTM as of 12/31/2011. 4 (3) Includes selected announced, closed and
effective transactions with targets in the biotechnology research equipment
manufacturers and biological products and life sciences tools and services
manufacturers sectors since 2006.
(4) Includes Thermo Fisher, Becton, Dickinson, Agilent, Life Technologies,
Sigma-Aldrich, Waters, Mettler-Toledo, Qiagen, PerkinElmer, Bio-Rad
Laboratories, Bruker and Techne.





 
 
 

 
 
 

Executive Summary (Cont'd)

Roche is increasing its all-cash offer to acquire Illumina to $51.00 per
share.

[] Illumina has continually emphasized significant growth opportunities for
sequencing in clinical settings as well as industrial end markets

-- However, no detail has been provided as to how Illumina will be able to
exploit such opportunities

-- No other evidence or quantitative support has been provided to reassure
shareholders of when or how this growth will be realized

[] In fact, since Roche's private offer, the only company news has surrounded
an increasing competitive landscape with product-related announcements from
Oxford Nanopore and Life Technologies

[] Additionally, company guidance for 2012 is in line with where research
analyst expectations were in December 2011, at which time the median price
target was $32.00 per share

-- Prior to the offer being made public, Illumina median price targets were at
$34.00 per share, 33% below Roche's offer

[] Illumina's pre-offer P/E/G of 1.51x was in line with its 1, 2 and 3 year
averages and P/E/G of peers (1)

-- 2.06x implied P/E/G of Roche's offer is 16% above any P/E/G Illumina has
traded at for the past three years

5
Source: FactSet, Capital IQ, I/B/E/S consensus, Bloomberg.
(1) Includes Thermo Fisher, Becton, Dickinson, Agilent, Life Technologies,
Sigma-Aldrich, Waters, Mettler-Toledo, Qiagen, PerkinElmer, Bio-Rad
Laboratories, Bruker and Techne.





 
 
 

 
 
 

Executive Summary

Offer Summary

Illumina Growth Perspectives

Illumina Share Price Perspectives Offer Price Rationale Next Steps

Conclusion 6





 
 
 

 
 
 

Notable Recent Events for Illumina

Over the past year, Illumina has underperformed its peers and the broader
market.

[] Illumina's stock dropped as much as 60% from its 52-week high because of
several factors, including:

-- Twice-lowered revenue guidance after a drop in orders due to the constrained
government spending environment

[] Government and academic clients account for 80% of Illumina's sales

[] Demand for its products was boosted by the 2009 stimulus package, but this
funding is being reduced

-- A shift in buyer preferences from high-cost, high-capacity machines ($500k+)
to low-cost, low-capacity machines ($50k+) and uncertainty around this product
line transition

-- Increased competition in its low-cost product line from Life Technologies
and Oxford Nanopore

[] Illumina is still facing revenue headwinds due to an unclear government
spending picture

-- Visibility of the FY 2013 budget for the National Institute of Health (NIH)
remains clouded

-- The NIH is a significant customer of Illumina (approximately one-third of
sales)

[] Illumina's pre-announcement of 2011 earnings at the JPMorgan Healthcare
Conference in mid-January was seen as a positive sign for the company

-- Illumina also introduced the HiSeq 2500, which can sequence an entire human
genome in a day and will help Illumina match competitive threats from Life
Technologies and Oxford Nanopore

-- However, in spite of these positive announcements, Illumina's stock price
only increased 3.7% on the day of announcement

[] Illumina reinstated guidance for FY 2012 on its Q4 2011 earnings call,
removing substantial amount of near-term uncertainty

-- However, Illumina management provided lowest ever growth guidance

-- Guidance was in-line with where analysts were before the JPMorgan Healthcare
Conference when median price target was $32.00 per share 7

Source: FactSet, Bloomberg.





 
 
 

 
 
 

Illumina's Business Faces Significant Challenges

[] All-cash offer transfers 100% of risk from Illumina's shareholders to Roche

[] Maturing market and unsettled global economic conditions imply reduced
growth prospects

[] Uncertainty around longer-term outlook for genetic funding by NIH and other
U.S. and foreign government organizations

-- Illumina's sales are vulnerable due to its highly concentrated sales
exposure to government and academic spending

[] Increasingly competitive landscape

-- Recent Life Technologies and Oxford Nanopore announcements around new
product introduction / enhanced product capabilities

[] Advances in technology

-- Single molecule / nanopore technologies currently being developed

[] Speculative nature around Illumina's announced single molecule chemistry

-- Multiple competitors in RandD

[] Illumina has little experience in regulated areas such as diagnostics that
require significant biological expertise as well as interactions with the FDA

[] Illumina meaningfully complements Roche's strategy around enabling
personalized healthcare

-- Roche is willing to take a longer term view in light of strategic
importance

-- Utilize Roche's comprehensive diagnostic expertise and global reach to
accelerate transition of sequencing to routine clinical use

-- Roche provides capabilities and reach that Illumina does not possess
in-house
8





 
 
 

 
 
 

However, Roche is Best Positioned to Overcome these Identified Challenges

Roche's global reach and expertise in diagnostics will allow Roche to
reinvigorate Illumina's growth in ways unattainable as a standalone company.

[] Roche is better positioned to make the type of investments that are required
for long term success

-- Roche is uniquely positioned to expand Illumina's end markets from both a
geographic and customer mix perspective

-- Rapidly evolving technologies may put additional risk to Illumina's business
over the next several years

-- Funding environment may remain challenging for an extended period of time

-- Roche intends to invest in growth, key employees and technologies

[] Illumina is a strong fit with Roche's diagnostics and Applied Science
business and complements Roche's portfolio in sequencing and microarrays and
strengthens offering in genomics research and diagnostics

-- The combined capabilities will strengthen Roche's position in sequencing and
microarrays to address the growing demand for genetic / genomic solutions

-- An acquisition of Illumina will strengthen Roche's position in the life
science and diagnostics market

-- Roche's extensive diagnostics experience and global presence could help
accelerate the 9 transition of DNA sequencing into clinical and routine
diagnostics





 
 
 

 
 
 

Offer Summary

Roche's all-cash offer of $51.00 per share is highly attractive, providing full
and certain value to Illumina's shareholders.



Consideration         []  $51.00 per share, all-cash
Unaffected Price      []  $27.17 on 12/21/2011
Premium               []  88% to unaffected 1-day (1)
                      []  84% to unaffected 1-month average (1)
Valuation             []  34.2x 2012E net income based on current estimates (2)
                      []  21.6x LTM EBITDA (3)
Financing             []  No condition, financed from available cash on Roche's
                          balance sheet and/or borrowings under its credit facilities
Anti-Trust            []  On March 13(th), the FTC made a second request regarding
                          Roche's microarray business
Shareholder Proposals []  Roche has nominated six highly qualified independent
                          directors for Illumina's Board
                      []  Roche has proposed to amend Illumina's bylaws to expand
                          Illumina's Board so that Roche-nominated directors will
                          comprise a majority


Source: FactSet, Capital IQ, I/B/E/S consensus, Bloomberg.
(1) Premiums based on unaffected closing share price of $27.17  on 12/21/2011,
the day prior to market rumors about a potential acquisition of Illumina by
Roche. (2) Based on I/B/E/S consensus estimate as of 3/28/2012.
(3) LTM as of 12/31/2011.


10





 
 
 

 
 
 

Key Events



                                         Event                   Date
Record Date                                    [] March 8, 2012
---------------------------------------------- ----------------- ----
Illumina's Annual Shareholder Meeting          [] April 18, 2012
---------------------------------------------- ----------------- ----
Expiration of Roche's Tender Offer             [] April 20, 2012


11





 
 
 

 
 
 

Situation Overview

After multiple attempts to engage with Illumina were rebuffed, Roche has taken
its offer directly to Illumina's shareholders.

[] On November 1, 2011, a member of Roche's Board spoke with Illumina's
Chairman and expressed Roche's interest in Illumina and requested a meeting.
Illumina agreed to a meeting in San Diego on December 13, 2011

[] On December 13, 2011, Roche's Chairman and the Roche Board member met with
Illumina's CEO and Chairman to discuss Roche's strategic interest in Illumina

[] On December 21, 2011, Roche's Chairman indicated to Illumina that Roche
would be willing to consider a price of up to 50% over Illumina's then-current
share price of $26.71

-- On December 22, 2011, a news story was published speculating about a
transaction between the parties, causing Illumina's stock price to jump by 7%

[] On December 28, 2011, Illumina's CEO told Roche's Chairman that Illumina
would probably be unable to convene its Board until the end of January, but
would try to consider the Roche proposal sooner than that

[] On January 3, 2012, Roche sent Illumina a private letter to formally propose
an all-cash offer of $40.00 per share

[] On January 17, 2012, Illumina convened a Board meeting and on January 19,
its CEO sent a letter to Roche formally rejecting the $40.00 per share offer

[] On January 25, 2012, Roche announced an all-cash offer to acquire Illumina
for $44.50 per share

[] On January 31, 2012, Roche announced its nomination of a slate of six
independent directors and intention to expand the size of Illumina's Board

[] On February 7, 2012, Illumina's Board unanimously recommended that
shareholders reject Roche's offer

[] On March 19, 2012, Illumina announced it would hold its annual shareholder
meeting on April 18, 2012

[] On March 29, 2012 Roche's Chairman reached out to Illumina's CEO and
informed him of the increased offer price and suggested that the two companies
engage in dialogue 12





 
 
 

 
 
 

Executive Summary

Offer Summary

Illumina Growth Perspectives

Illumina Share Price Perspectives Offer Price Rationale Next Steps

Conclusion 13





 
 
 

 
 
 

Heightened Competition Increases Uncertainty of Illumina's Growth Prospects


Oxford Nanopore

[] On February 17, 2012, Oxford Nanopore unveiled high performance electronic
sequencing devices GridION and MinION

[] MinION System, a disposable DNA sequencing device the size of a USB memory
stick, is expected to price at less than $900 per unit and is capable of
sequencing DNA directly from blood with throughput of 10's of Gb per 24 hours

[] Analysts believe Oxford Nanopore's new devices could have a disruptive
effect on the DNA sequencing market and may dampen future growth potential for
Illumina

"For both LIFE and ILMN this will lead to questions on the future growth
potential (especially in 2013 and beyond) for their sequencing franchises and
we are seeing that in the pressure that both stocks are under today. While the
Roche takeout attempt has provided some support for ILMN shares, much of the
multiple expansion in LIFE shares in 2012 has been driven by excitement for
their PGM/Ion Proton sequencing technology. Today's presentation from ONT could
dampen much of that enthusiasm for LIFE."
- Credit Suisse, February 17, 2012

"Oxford Nanopore Exceeds Expectations. In what has been an otherwise quiet
AGBT, privately held Oxford Nanopore presented additional details on the
company's sequencing pipeline. While it is not a surprise that the company is
planning to launch a sequencer in 2H2012, we believe newly revealed plans for a
"thumb-drive" like sequencer, the initial pricing plans, and initial specs
exceeded expectations. While we will present more details in our wrap up note,
some highlights include up to 40K bp reads, an error rate of only 4%, and
pricing that is well below the competition (including an option for virtually
no capital cost)."
- Cowen, February 17, 2012

"The data was well above expectations in almost every way: throughput, read
length, ease of use, level of sample prep, accuracy, run time and costs...
Although we need to see how the technology behaves in the hands of scientists,
if it works as promised and ONT can execute on its commercialization plan, then
this could have a disruptive effect on the DNA sequencing market and is a
negative for sequencing companies like LIFE, ILMN and PACB, as well as array
providers like AFFX."
- Bank of America Merrill Lynch, February 17, 2012


Life Technologies

[] On January 10, 2012, Life Technologies announced it had begun taking orders
for its new $149,000 benchtop Ion Proton Sequencer that is designed to sequence
the entire human genome in a day for $1,000

[] Analysts believe Ion Proton will make Life Technologies newly competitive in
the high-end sequencing market (currently dominated by Illumina) and also may
improve Life Technologies' offerings to small research labs and clinical
settings

"Today, Life Technologies announced the release of a new DNA sequencer, the Ion
Proton. Priced at $149k, this is a natural product line extension over the PGM
(priced at $49,000) and shipments will begin in mid-2012, with early access
customers receiving the system in early 2Q12. The first chip (Proton 1 -- for
exome sequencing, $699) will be available in mid-2012 and the second (Proton II
-- for whole human genome sequencing, $1,000) will be available about 6 months
later (YE2012)." "The introduction of the Ion Proton will crowd the high-end of
the DNA sequencing market with its unique capabilities -- namely speed. We also
note the quality of early access customers referenced in the press release
(Nusbaum at Broad, Gibbs at Baylor, Lifton at Yale), all of whom are leading
minds in the field and whose opinions will carry weight among customers. We
therefore view this news as a negative for competing high-end platforms
(Illumina HiSeq, Life Technologies SOLiD, Pacific Biosciences RS) given the
constrained funding environment."
- Goldman Sachs, January 10, 2012

"Ion Proton specs imply a game changer. In addition to per genome and system
cost, the Ion Proton is purported to bring industry leading speed without the
need for an outsized IT investment. Even without details on accuracy, systems
specs imply serious competition for other NGS providers." "Based on the
technology underpinning the Ion Torrent, the Ion Proton will be able to
sequence a genome in one day for $1,000. Life will strategically target
Illumina's core HiSeq markets: genomic centers, mid size labs, cores and
centralized testing labs." - Oppenheimer, January 10, 2012

14





 
 
 

 
 
 

Gene Sequencing Market Continues to Mature

Illumina's statements around its substantial near term growth opportunities are
not consistent with the views of the broader equity research community.

[] Technological innovation continues to put pressure on pricing

[] Growth prospects have weakened, as macro-economic headwinds as well as
government and institutional/academic funding constraints pose secular
challenges

Diminishing Outlook on the Sector

"Although it remains to be seen how future specifications will evolve, the one
certainty today is that we are in for a period of heightened competition for
share across the throughput spectrum in sequencing, with the Ion PGM vs. MiSeq
at the low throughput end, and the Ion Proton vs. the HiSeq at the high
throughput end. This battle for share will likely play out as costs decline and
profitability for sequencing providers potentially comes under pressure. Also,
note that the backdrop is one of funding constraints (concerns of significant
cuts to the NIH budget in 2013, European macro pressures)."
Barclays, January 11, 2012


Illumina 2-Year  Forward Growth Expectations (Revenue CAGR) (1)

44.4%

29.9%

24.6%

18.8% 17.7%

5.9%

Jan-07  Jan-08  Jan-09  Jan-10  Jan-11  Jan-12


Illumina 2-Year  Forward Growth Expectations (Adjusted EPS CAGR) (1)

35.5%
31.7%
29.4% 30.3%

18.9%

13.3%

Jan-07  Jan-08  Jan-09  Jan-10  Jan-11  Jan-12


Source: Company filings, Capital IQ.
(1) 2-Year  forward growth expectations based on prior year actual results and
2-year  forward I/B/E/S consensus estimates as of January 1 of the respective
year.


15





 
 
 

 
 
 

Diminishing Illumina Growth Prospects

Lowest growth guidance ever provided by Illumina management despite the
disappointing 2011 results, which provided a lower base for year-over-year
comparison in 2012.


Illumina Management Guidance

Revenue


39.5%

Lowest level of
23.0%
20.0% 20. 0% guidance provided

7.5%



             (1) '07 - '08 '08 - '09 '09 - '10 '10 - '11 '11 - '12


Adjusted EPS (2)


36.0%

  30.0% Lowest level of 25.0% guidance provided
18.8%
11.5%



            (1) '07 - '08 '08 - '09 '09 - '10 '10 - '11 '11 - '12


Source: Company filings and Bloomberg.
Note: Guidance reflects initial guidance provided by Illumina management for
the upcoming year.
(1) Reflects midpoint of 2012E revenue guidance of $1,100 -- $1,175mm and EPS
guidance of $1.40  - $1.50.
(2) 2007-2011  guidance based on initially reported Adjusted EPS; 2008 guidance
adjusted by estimated stock based compensation expense based on 2007 amount.


16





 
 
 

 
 
 

Executive Summary

Offer Summary

Illumina Growth Perspectives

Illumina Share Price Perspectives Offer Price Rationale Next Steps

Conclusion 17





 
 
 

 
 
 

Illumina's Share Price Has Underperformed Peers

Over the past 3-years, Illumina has underperformed its peers and the broader
market.

Indexed Price Performance From January 2009 -- January 2012



                          300.0%

                                             Recent Management Performance

                                         []      Missed quarterly earnings twice in 2011

                          250.0%

                                         []      Suspended forward guidance in October 2011

                                         []      Refused to engage in dialogue with Roche

                          200.0%

                                                                                                        ------        ------


       60.5%

       58.0%
                          150.0%

                                         --- ------ ------ ------ ------ ---------------- ------

Indexed Price Performance
       35.8%
                          100.0%

                                         ===

                           50.0%

                                         --- ------ ------ ------ ------ ---------------- ------ ------ ------ ------ ------ ------
 ------
                               --

                                  Jan-09     Apr-09 Jul-09 Oct-09 Jan-10 Apr-10           Jul-10 Oct-10 Jan-11 Apr-11 Jul-11 Oct-11
 Jan-12


Illumina Peer Index S and P 500
Source: FactSet as of 1/24/2012. 18 Note: Peer Index includes Thermo Fisher,
Becton, Dickinson, Agilent, Life Technologies, Sigma-Aldrich, Waters,
Mettler-Toledo, Qiagen, PerkinElmer, Bio-Rad Laboratories, Bruker and Techne.
Stock price data weighted based on market capitalization.





 
 
 

 
 
 

Illumina Share Price Decline Driven by Diminishing Growth Prospects



Illumina Share Price Post Earnings
Release (1)
           $70.65
    $69.44
                  $57.33
                         52.5% decline in stock price
                                   $33.01
                           $30.80
---------- ------ ------ -------- -------------------
     Q4'10 Q1'11  Q2'11    Q3'11  Pre-Ann.(2)

Illumina 2-Year Forward Growth Estimates
(Adjusted EPS)
        34.3%
              30.3%
                    24.1%
                          65.1% decline in 2-Year forward
                          growth expectations
                                12.0%
                          11.1%
------------- ----- ----- ----- -------------------------
        Q4'10 Q1'11 Q2'11 Q3'11 3/28/12


Source: FactSet, Capital IQ, I/B/E/S consensus as of 3/28/2012.
Note: 2-Year  forward growth estimates based on growth estimates for following
eight quarters.
(1) Post earnings release prices and growth estimates as of 2/9/2011,
4/27/2011, 7/27/2011 and 10/25/2011.
(2) Pre-offer  price as of 1/10/2012, the day Illumina pre-announced  2011
revenue and adjusted EPS.


19





 
 
 

 
 
 

Illumina Valuation Over Time

Until recently, Illumina's projected revenue and net income growth were well
above its peer average. As this gap in growth between Illumina and its peers
has closed, the gap in valuation between them has narrowed.


Share Price Performance From January 2009 -- January 2012



$80

         [] Prior to the Q2 2010 stock run up, Illumina had traded between $20 - $40 for ~3 years

                                                                                                                  ------

         [] Run-up was driven by significant growth expectations

               -- Justifying premium P/E multiple to peers

$60      [] Similarly, recent stock price has been driven by meaningful decline in growth prospects

                                                                                                           ------

               -- Still traded at premium P/E despite lower growth expectations relative to peers

                                                                                                    ------
             =======

             3
                                                                        ---------------------------
             -------
$40

            -----------        ------ -------------------------- ====== ---------------------------                      ---------
      ------ -------
                                                                        1                                                2

    ------- ----------- ------ ------ -------------------------- ====== =========================== ------ ------ ------ =========
 ------ ------ -------
$20

    Jan-09       Mar-09 Jun-09 Sep-09 Dec-09                     Mar-10      May-10                 Aug-10 Nov-10 Feb-11    May-11
 Jul-11 Oct-11  Jan-12


Valuation


1. Start of Run-up (Q1 2010)



                                 Peer
                       Illumina
                                Median
                       ======== ======
LTM Net Income           $90
NTM Net Income (proj.)   145
 % Growth               61.1%     8.4%
NTM Revenue Growth      24.7%     8.2%
====================== ======== ======

2. Peak Period (Q1 2011)



                                 Peer
                       Illumina
                                Median
                       ======== ======
LTM Net Income          $166
NTM Net Income (proj.)   230
 % Growth               38.8%     8.9%
NTM Revenue Growth      19.5%     7.3%
====================== ======== ======


3. Unaffected (1)



                                 Peer
                       Illumina
                                Median
                       ======== ======
LTM Net Income          $173
NTM Net Income (proj.)   192
 % Growth               10.9%    10.5%
NTM Revenue Growth        4.2%    8.0%
====================== ======== ======

        45.0x 38.5x
        30.0x
NTM P/E                   16.9x
        15.0x
              -------- -----------
         --
              Illumina Peer Median

              42.7x
        45.0x
        30.0x
NTM P/E                  19.1x
        15.0x
              -------- -----------
         --
              Illumina Peer Median

        45.0x
        30.0x
              17.8x
NTM P/E                  13.0x
        15.0x
              -------- -----------
         --
              Illumina Peer Median


Source: Company filings, FactSet, I/B/E/S consensus.
Note: Equity value and estimates as of 10-days  post announcement; net income
represents non-GAAP  adjusted net income.
(1) Calculated using Illumina's share price of $27.17,  publicly available
filings and consensus analyst estimates as of December 21, 2011, the day prior
to market rumors about a potential acquisition of Illumina by Roche.


20





 
 
 

 
 
 

Illumina Rolling NTM P/E/G Analysis

Roche's offer implies a price-to-earnings-growth ratio that is a 16% premium to
Illumina's three-year high and well above its three-year average.



                 2.25x
                                                                                                              Offer: 2.06x
                 2.00x
                                                                                                       Initial Public Offer: 1.75x
  45% Premium
                 1.75x
  to three-year
         NTM P/E/G
  average
                 1.50x
 Pre-Offer: 1.51x (1)
 Two-year avg.: 1.47x
Three-year avg.: 1.42x
 One-year avg.: 1.40x
                 1.25x
                                                                               Unaffected: 1.07x (2)
                 1.00x
                 0.75x
                              ------ ------ ------ ------ ------ ------ ------ --------- ------------- ------ ------- ------------

                 0.50x
                       Jan-09 Apr-09 Jul-09 Oct-09 Jan-10 Apr-10 Jul-10 Oct-10    Jan-11 Apr-11        Jul-11  Oct-11 Jan-12


Source: Company filings, Bloomberg, Capital IQ, I/B/E/S consensus, and FactSet.

(1) Calculated using Illumina's share price of $37.69,  publicly available
filings and research consensus estimates as of January 24, 2012, the day prior
to the public announcement of Roche's offer of $44.50  per share for Illumina.

(2) Calculated using Illumina's share price of $27.17  as of 12/21/2011, the
day prior to market rumors about a potential acquisition of Illumina by Roche,
publicly available filings and consensus analyst estimates as of January 24,
2012, the day prior to the public announcement of Roche's offer of $44.50  per
share for Illumina.


21





 
 
 

 
 
 

Absent Roche's Offer, Illumina Would Likely be Trading at Much Lower Levels



                   P/E/G Adj. Price
 3-Year Avg. Forward P/E/G            1.42x
 Current LT Consensus Growth Rate     16.6%
                                    =======
Implied Forward P/E                   23.6x
2012E EPS Guidance (1)             $1.45
=================================== =======
P/E/G Adj. Price                    $34.20

$60.00
              Actual Stock Performance
              P/E/G Adj. Price
       ------ ----------------------------- ------
$55.00
                                                                            Offer: $51.00
                                                   ---------------
$50.00                                                                                           $49.88 Current
$45.00                                                             Initial Public Offer: $44.50
                                                   ---------------
                                                                                                      Discount to
                                                                                                    Roche's Offer:
                                                                                                           33%
$40.00
$35.00                                                                $34.20 P/E/G Adj. Price
              -----                         ------ ---------------
                                                 Roche makes offer
$30.00                                           public, increasing the
                                                 all-cash offer to $44.50
       ------ ----- ----------------------- ============================= ---------------
$25.00         Increase in Illumina's share Illumina price movement of 3.7% based on 2011
               price following rumors of    results and product updates at JPM Healthcare
               takeover speculation         Conference
       ==================================== ====================== ====== =============== ------
$20.00
       21-Dec 4-Jan 18-Jan                   1-Feb 15-Feb          29-Feb 14-Mar          28-Mar


Source: Company filings, Bloomberg, Capital IQ, I/B/E/S consensus, and FactSet
as of 3/28/2012.
(1) Reflects midpoint of Illumina 2012E EPS management guidance of $1.40  -
$1.50.


22





 
 
 

 
 
 

Absent Roche's Offer, Illumina Would Likely be Trading at Much Lower Levels
(Cont'd)


Estimated Unaffected Price

[] Starting point is Illumina's unaffected stock price as of 12/21 close
($27.17)   (1)

[] From 12/22 to 1/9, Illumina increases or decreases by the same percentage
each day as its peer index

[] On 1/10 (day of JPMorgan Conference announcement), Illumina increases by the
actual increase (3.7%)

[] On 1/11 and after, Illumina increases or decreases by the same percentage
each day as its peer index



$60.00
              Actual Stock Performance
              Estimated Unaffected Price
              ------------------------------------
$55.00
                                                                                 Offer: $51.00
                    -----------------------        -------------------        ---------------------
$50.00                                                                                              $49.88 Current
$45.00                                                                 Initial Public Offer: $44.50
                    -----------------------        -------------------
                                                                                                         Discount to
                                                                                                       Roche's Offer:
$40.00                                                                                                        35%
                                                                              $33.04 Estimated
$35.00                                                                        Unaffected Price
                                            ------ ------------------- ------
$30.00                                          Roche makes offer
                                                public, increasing the
                                                all-cash offer to $44.50
       ------ ----- ----------------------- ================================= -----------
$25.00
               Increase in Illumina's share Illumina price movement of 3.7% based on 2011
               price following rumors of    results and product updates at JPM Healthcare
               takeover speculation         Conference
       ==================================== ========================== ====== =========== ---------
$20.00
       21-Dec 4-Jan 18-Jan                   1-Feb 15-Feb              29-Feb   14-Mar    28-Mar


Source: FactSet as of 3/28/2012.
Notes: Peer Index includes Thermo Fisher, Becton, Dickinson, Agilent, Life
Technologies, Sigma-Aldrich,  Waters, Mettler-Toledo,  Qiagen, PerkinElmer,
Bio-Rad  Laboratories, Bruker and Techne. Stock price data weighted based on
market capitalization.
(1) Based on unaffected closing share price of $27.17  on 12/21/2011, the day
prior to market rumors about a potential acquisition of Illumina by Roche.


23





 
 
 

 
 
 

Absent Roche's Offer, Illumina Would Likely be Trading at Much Lower Levels
(Cont'd)


P/E Adj. Price

[] Starting point is Illumina's P/E multiple as of 12/21 (17.8x), which
represents a premium of 4.8x compared to the peer median of 13.0x (1)

[] From 12/22 to 1/9, Illumina's multiple is assumed to be 4.8x higher than the
median of its peers

[] On 1/10 (day of JPMorgan Conference announcement), Illumina's multiple
increases by 0.8x (from 21.0x to 21.8x) whereas the peer's median multiple
increases by 0.1x, representing a premium of 0.7x for Illumina (2)

[] On 1/11 and after, Illumina's multiple is assumed to be 5.5x higher (an
increase of 0.7x from the previous 4.8x) than the median of its peers



$60.00
              Actual Stock Performance
              P/E Adj. Price
       ------ ----------------------------- ----------
$55.00
                                                                                 Offer: $51.00
                                                       ---------------- --------
$50.00                                                                                           $49.88 Current
                                                                        Initial Public Offer: $44.50
$45.00
                                                       ---------------- -------- --------
                                                                                                      Discount to
                                                                                                    Roche's Offer:
$40.00                                                                                                     38%
                     ----------------------
$35.00
                                                                              $31.84 P/E Adj. Price
              ------                        ---------- ----------------
$30.00                                           Roche makes offer
                                                 public, increasing the
                                                 all-cash offer to $44.50
       ------ ------ ---------------------- ==================================== --------
$25.00         Increase in Illumina's share Illumina price movement of 3.7% based on 2011
               price following rumors of    results and product updates at JPM Healthcare
               takeover speculation         Conference
       ==================================== ========== ================ ======== ======== ------------------------
$20.00
       21-Dec  4-Jan 18-Jan                   1-Feb    15-Feb             29-Feb 14-Mar   28-Mar


Source: Company filings, Bloomberg, Capital IQ, I/B/E/S consensus, and FactSet
as of 3/28/2012. Note: Reflects midpoint of Illumina 2012E EPS management
guidance of $1.40  - $1.50.
(1) Based on unaffected closing share price of $27.17  on 12/21/2011, the day
prior to market rumors about a potential acquisition of Illumina by Roche.
(2) Reflects incremental P/E multiple expansion vs. peers post JPMorgan
Healthcare conference and earnings pre-release  on 1/10/2012.


24





 
 
 

 
 
 

Illumina 2012 Guidance in Line with Pre-JPM  Healthcare Conference Consensus
Estimates

[] Illumina's pre-announcement  of earnings and signal on 2012 guidance had
minimal impact on analysts' price targets

[] Pre-JPM  Healthcare Conference, the median Illumina price target was $32



                        Pre-JPM Conference Metrics Comparison to Company Guidance (1) Price Target
       Broker                     2012E Revenue
                           Date                      $mm Variance % Variance              Pre-JPM
                                       ($mm)
Credit Suisse           1/9/2012       $1,070              $67       6.3%                  $30.00
Piper                   1/6/2012       1,137                 0       0.0%                  30.00
Cantor Fitzgerald       1/5/2012       1,122                16       1.4%                  35.00
William Blair           1/4/2012       1,088                50       4.5%                   N.A.
BAML                    1/4/2012       1,055                83       7.8%                  32.00
UBS                     1/4/2012       1,115                23       2.0%                  32.00
Wedbush                12/8/2011       1,145                (8)      (0.7%)                35.00
Cowen                  12/5/2011       1,093                44       4.0%                   N.A.
Credit Agricole        11/30/2011      1,105                33       2.9%                  30.00
Macquarie              11/25/2011      1,063                75       7.0%                  27.00
RBC                    10/27/2011      1,147                (9)      (0.8%)                29.00
Maxim                  10/26/2011      1,168               (31)      (2.6%)                 N.A.
Barclays               10/26/2011      1,126                12       1.0%                  33.00
Goldman Sachs          10/26/2011      1,080                57       5.3%                  32.00
Auriga                 10/26/2011      1,206               (69)      (5.7%)                47.00
Baird                  10/26/2011      1,108                29       2.6%                  30.00
Deutsche Bank          10/25/2011      1,040                98       9.4%                  29.50
Leerink                10/25/2011      1,079                59       5.4%                   N.A.
JPMorgan               10/25/2011      1,004               134      13.3%                  44.00
Mizuho                 10/25/2011      1,185               (47)      (4.0%)                40.00
Oppenheimer            10/25/2011      1,046                92       8.7%                   N.A.
                  =============== ================ ============== ===================== ============
                  Mean                 $1,104              $34       3.2%                  $33.47
                  Median               $1,105              $33       2.9%                  $32.00
                  =============== ================ ============== ===================== ============


Source: Wall Street research.
(1) As compared to $1,138 million, the midpoint of Company guidance of $1,100
to $1,175 million for 2012E sales.


25





 
 
 

 
 
 

Analyst Observations

                              "What is debatable is Illumina's growth potential
over the next 2-3 years (investment time horizon for the majority of the
shareholders, in our view), which we estimate is significantly below market
projections when shares were trading at >$70/share, as well as Illumina's
potential for success in Dx as a standalone company (vs. under Roche). Despite
Illumina's breathtaking technologies, we think Sung Ji Nam end market growth
potential is a more important determinant for valuation, and with the
sequencing based (2/8/2012) clinical diagnostic market still in early stages,
6-7x fwd sales valuation (as implied by share price of $60-70, at the high end
of guidance) is unattractive even for Roche."

"From our perspective the quarter was a mixed bag, as HiSeq consumable
pull-through was marginally better sequentially but well off the previous
year's highs. In addition, microarray revenue was again down and management now
sees this business as flattish in 2012. On the bright side, demand for the
MiSeq has been brisk with solid interest from clinical markets, underscoring
the large bench-top NGS
David Ferreiro opportunity. Guidance for 2012 seems achievable; however, the
midpoint of revenue guidance will
(2/8/2012)
bring ILMN into uncharted territory of single digit growth, a reasonable
scenario given the potential competition."

                              "While we agree with management's view that near
term academic funding uncertainty masks the longer term growth opportunities,
we think that the timeline for benefiting from these new markets remains Ross
Muken highly uncertain. "
(2/7/2012)


26





 
 
 

 
 
 

Illumina's Actions Suggest Bearish View of Stock Price

[] Throughout the first half of 2011, Illumina repurchased stock in the $60's
and $70's

[] However, after suspending forward guidance and highlighting a pull-back in
academic research spending, Illumina ceased its share repurchases

[] Most recently in its 14D-9, Illumina stated that its recent stock price
decline is a "temporary dislocation"

[] If Illumina believed its stock price were temporarily dislocated, prudent
corporate finance would have been to execute a meaningful share repurchase or
retire the out-of-the money warrants, especially given ample cash flow
generation in Q4 2011

-- Such lack of activity (after previously buying back shares at high price
levels) calls into question whether Illumina viewed its Q4 stock price as a
"temporary" dislocation



                              Q1'2011 Buyback: $338mm     Q2'2011 Buyback: $28mm       Q3'2011 Buyback: $204mm      Q4'2011: Did not
 buy back
                             ($64.53 avg. cost per share) ($71.07 avg. cost per share) ($56.89 avg. cost per share)   any shares or
 warrants
              ------------------------------------------- ---------------------------- ----------------------------
 -------------------------
              $80.00
                                                                                       ---

              $60.00
  Share Price
              $40.00
                                  ----------------------- ----------- ---------------- --- ------------------------ -----------
 -------------
              $20.00
                       Jan-11     Mar-11                       May-11 Jun-11               Aug-11                        Oct-11
 Dec-11
Source:          Company filings.


27





 
 
 

 
 
 

Illumina's Actions Suggest Bearish View of Stock Price (Cont'd)

[] When Illumina repurchased its 2014 convertible debt and unwound the
corresponding bond hedge (Illumina's right to purchase 18.3mm Illumina shares
at $21.83), Illumina did not retire warrants related to the convertible bond
call spread (counter-parties' right to purchase 18.3mm Illumina shares at
$31.435)

[] In Q4 2011, the intrinsic value of the warrants was $0 (as Illumina's share
price was below the warrant strike price)

-- Given Illumina's cash balance of $1.1bn, the company had sufficient means to
extinguish the warrants

[] If Illumina believed its stock price was only temporarily dislocated, an
attractive alternative would have been for Illumina to repurchase the warrants
from Goldman Sachs and Deutsche Bank

-- Using assumptions from the 14D-9, it is clear that the value of this
unbounded liability can grow by hundreds of millions of dollars if Illumina's
stock price recovers

-- Leaving such a volatile and unbounded liability in place contradicts
Illumina's stated belief of "temporary" dislocation in their Q4 stock price



                                                        Pre-Offer                                      Pre-Offer
                               Post-Offer
                                                 Intrinsic Value of                                Time Value of
                    Intrinsic and Time Value of
                                            Counterparty Warrants                           Counterparty Warrants
                     Counterparty Warrants
    $500
                                    $488
    $400

    $300

    $200                                                                                                    $163

Warrant Value ( $ in mm) $100

                                                               $0

                              -------------------------------------------------------------
 ----------------------------------------------------------- ----------------------------------------------------------
         --

                                                                           (1)                                          (1)

                                                         12/21/2011                                    12/21/2011
                                  2/6/2012

                            @ $51.00 Offer
 Source:                      Company filings.

 Note:                        All warrant values based on implied volatility of 61.1%, derived from 14D-9 disclosure calculated by
 assuming the $273 million estimated in the 14D-9 to be owed to Goldman Sachs if
                              the Roche $44.50 offer were consummated on February 6, 2012 represents the aggregate value of the
 warrants held by Goldman Sachs; full warrant value based on grossing up the
                              $273mm estimated to be owed to Goldman Sachs in the 14D-9 to include the amount of warrants held by
 other counterparties.
 (1)                          Represented illustrative warrant value as of unaffected date.



28





 
 
 

 
 
 

Executive Summary

Offer Summary

Illumina Growth Perspectives

Illumina Share Price Perspectives Offer Price Rationale Next Steps

Conclusion


29





 
 
 

 
 
 

Offer Multiples Above All Peers

Roche's offer values Illumina well above any of its peers based upon a P/E
multiple. Even after adjusting for growth, the P/E/G multiple is well above the
peer median P/E/G.



2012E P/E

     34.2x

              29.6x

                           25.3x

                                                 20.5x 20.3x

                                                             18.6x 18.4x 18.2x    18.0x          16.5x 16.4x
 Median: 16.4x
                                                                   ----- ----- -----------------       -----

                                                                                                             13.9x 13.8x 13.7x 12.6x
 12.3x
------------- ---------------------------------- ----- ----- ----- ----- ----- ----------------- ----- ----- ----- ----- ----- -----
 --------
     Illumina Illumina (2) Illumina              TECH  MTD   SIAL   BIO  WAT    Illumina         QGEN  BRKR  BDX     A   PKI   TMO
 LIFE
     (Offer) (1) (1/24 Offer) (Pre-Offer)(3)                               (Unaffected)(4)

2012E P/E/G

     2.06x                            2.04x 1.94x 1.93x

              1.79x                                     1.77x 1.73x

                                                                    1.51x   1.51x          1.41x
    Median: 1.46x
                                                                                                 1.30x 1.24x

                                                                                                             1.10x    1.07x
 1.03x 0.98x
------------- ----------------------- ----- ----- ----- ----- ----- ----- ---------------- ----- ----- ----- ----- -----------------
 ----- ----------
     Illumina Illumina                SIAL   BIO  TECH  QGEN  BDX   WAT    Illumina        MTD   LIFE   PKI  BRKR    Illumina
 TMO     A
     (Offer) (1) (1/24 Offer) (2)                                     (Pre-Offer)(3)                         (Unaffected)(4)


Source: Company filings, Bloomberg, Capital IQ, I/B/E/S consensus, analyst
research as of 3/28/2012.
Note: All Illumina statistics excluded from median calculations. Financials
have been calendarized to 12/31 FYE. (1) Represents an offer price of $51.00
per share.
(2) Represents an offer price of $44.50  per share.
(3) Calculated using Illumina's share price of $37.69,  publicly available
filings and I/B/E/S consensus estimates as of January 24, 2012, the day prior
to the public announcement of Roche's offer of $44.50  per share for Illumina.

(4) Calculated using Illumina's share price of $27.17  on December 21, 2011,
the day prior to market rumors about a potential acquisition of Illumina by
Roche, and publicly available filings and I/B/E/S consensus estimates as of
January 24, 2012.


30





 
 
 

 
 
 

Offer Multiples Above Precedents

Roche's offer is at the high end of valuation multiples paid in recent
precedent life science tools transactions.



Enterprise Value / LTM Revenue

7.0x     6.5x

6.0x                      5.6x

                                               4.9x

5.0x                                                                  4.3x

4.0x                                                                                         3.3x
       Median: 3.3x
                                       ----------------------                        -------------------
 -------------------------------------
                                                                                                              3.3x              2.9x

                                                                                                         ---------------

3.0x

2.0x
               1.5x
1.0x

     -------------- ------------------ ---------------------- ---------------------- ------------------- ---------------
 -------------------- ----------------
 --

     Roche's Offer  Roche's 1/24 Offer Thermo Fisher / Dionex Merck KGaA / Millipore GE Health / Whatman MDS / Molecular Invitrogen
 / Applied Agilent / Varian
     ($51.00/share)   ($44.50/share)          12/13/10              02/28/10               02/04/08         01/29/07
 06/12/08           07/27/09


Enterprise Value / LTM EBITDA



25.0x

         21.6x                                  20.6x

20.0x                      18.5x                                       18.1x              17.6x


        Median: 16.0x
                                        ---------------------- ---------------------- --------------- --------------------

15.0x                                                                                                       14.3x
 13.3x

               11.7x
10.0x

 5.0x

      -------------- ------------------ ---------------------- ---------------------- --------------- --------------------
 ------------------- ----------------
  --

      Roche's Offer  Roche's 1/24 Offer Thermo Fisher / Dionex Merck KGaA / Millipore MDS / Molecular Invitrogen / Applied GE Health
 / Whatman Agilent / Varian
      ($51.00/share)   ($44.50/share)          12/13/10              02/28/10            01/29/07          06/12/08
 02/04/08         07/27/09


Source: Company filings, Bloomberg, Capital IQ, I/B/E/S consensus.
Note: Includes selected announced, closed and effective transactions since 2006
in the biotechnology research equipment manufacturing and biological products
and life sciences tools industries. Roche offer excluded from median
calculations. LTM Illumina statistics as of 12/31/2011.


31





 
 
 

 
 
 

Offer Premiums Above Precedent Transactions

Unaffected Premiums



                             1 Day Premiums
       Roche's Offer
                                                         88%
       ($51.00/share)
   Roche's 1/24 Offer
                                                 64%
     ($44.50/share)
       Merck KGaA /
          Millipore                      50%
          02/28/10
    MDS / Molecular
                                        49%
        01/29/07
    Illumina / Solexa
                                      44%
        11/13/06
      Agilent / Varian
                                 33%
         07/27/09
     Thermo Fisher /                 Median: 33%
          Dionex             21%
         12/13/10
 Invitrogen / Applied
                           17%
      06/12/08
GE Health / Whatman
                        12%
      02/04/08
                        -------- ---- ---------- --- --- -------
                     --  20%      40%       60%      80%    100%

                        1 Month Average Premiums
        Roche's Offer
                                                                 84%
       ($51.00/share)
   Roche's 1/24 Offer
                                                         61%
     ($44.50/share)
    MDS / Molecular
                                                     56%
        01/29/07
        Merck KGaA /
          Millipore                                53%
          02/28/10
     Illumina / Solexa
                                             42%
         11/13/06
     Agilent / Varian
                                          37%
         07/27/09
      Thermo Fisher /                        Median: 37%
          Dionex                     28%
         12/13/10
GE Health / Whatman
                                 19%
      02/04/08
  Invitrogen / Applied
                             12%
       06/12/08
                        ------------ ------- --------------- --- --- ----
                     --       20%        40%        60%      80%     100%


Source: Company filings, Bloomberg, FactSet.
Note: Includes announced, closed and effective transactions since 2006 in the
biotechnology research equipment manufacturing and biological products and life
sciences tools industries Roche offers excluded from median calculations.
1 day and 1 month average based on starting date of 12/21/2011, the day prior
to market rumors about a potential acquisition of Illumina by Roche.


32





 
 
 

 
 
 

Executive Summary

Offer Summary

Illumina Growth Perspectives

Illumina Share Price Perspectives Offer Price Rationale Next Steps

Conclusion





 
 
 

 
 
 

Pro-Shareholder Governance Proposals

Roche's proposals place control of Illumina with its own shareholders.



                               Roche's Proposals                                                Rationale for Proposals
[] Fill the four directorships up for election with Roche's
   nominees
                                                                  []  Elect highly qualified, independent directors to the Board
[] Fill the two newly created directorships with Roche's nominees
                                                                  []  Elect highly qualified, independent directors to the Board
                                                                  []  Increase the Board by two directors, allowing a majority of
 the
[] Amend bylaws to increase the number of directors on the
   Board of Directors                                                 directors on the upsized Board to stand for election at the
 2012
                                                                      annual meeting
[] Amend bylaws to require newly created directorships be filled  []  Ensure that Illumina shareholders determine who fills the
   only by a stockholder vote                                         vacancies created by their approval of the expansion of the
 Board
[] Repeal any bylaw amendments adopted by Illumina's Board of     []  Ensure the current Illumina Board does not preemptively
   Directors without stockholder approval after April 22, 2010        disenfranchise shareholders


34





 
 
 

 
 
 

Independent, Qualified Director Nominees

These independent nominees are exceptionally qualified to serve in the best
interest of Illumina shareholders.


Nominees for Existing Board Seats (1)

Bary Bailey

-- Age 53
-- President of 4B Management LLC
-- Operating Partner at Cressey and Company
-- Former CFO of AMN Healthcare Services
-- Former CFO of Valeant Pharmaceuticals

Dwight Crane, Ph.D.

-- Age 74
-- Professor Emeritus at Harvard Business School
-- Lead Director of Legg Mason Partners Equity Funds
-- Consultant to financial institutions


Jay Hunt

-- Age 72
-- President and co-Founder of The Development Group
-- Director of DD iCorp and BMC Select
-- Former member of the Advisory Board of Joie De Vivre Hospitality
-- Former Director of Gentiae Clinical Research
-- Former Chairman of the Ischemia Research and Education Foundation

Michael Griffith

-- Age 53
-- CEO and Director of Laureate Biopharmaceutical Services, Inc.
-- Founder and former CEO of Aptuit, Inc.
-- Former commercial and investment banker


Nominees for Newly Created Board Seats (2)


Earl (Duke) Collier, Jr.

-- Age 64
-- Former Executive Chairman of Arsenal Medical
-- Former CEO of 480 Biomedical
-- Former EVP at Genzyme Corporation
-- Former interim CEO at deCode Genetics
-- Former President of Vitas Healthcare
-- Former partner at Hogan and Hartson (now Hogan Lovells)


David Dodd

-- Age 62
-- Co-founder of VaxyGen Holdings, LLC
-- CEO of RiversEdge BioVentures, LLC
-- Director of GeoVax Labs
-- Former President, CEO and Chairman of BioReliance Corporation
-- Former non-executive Chairman of Stem Cell Sciences Corporation
-- Former President, CEO and Director of Serologicals Corporation
-- Former President and CEO of Solvay Pharmaceuticals, Inc.


(1) Nominated to fill the seats of the incumbent directors, whose terms expire
at the 2012 Annual Meeting.

(2) Nominated to fill the newly created directorships on Illumina's Board that
would result from voting for Roche's proposals.



35





 
 
 

 
 
 

Independent, Qualified Director Nominees

These independent nominees will serve in the best interest of Illumina
shareholders and are not beholden to Roche.

[] Roche's independent nominees are distinguished executives and academics with
substantial prior board experience and pristine reputations

[] If elected to Illumina's board, they will exercise their independent
judgment in complete accordance with their fiduciary duty to Illumina's
shareholders

[] They will carefully determine what is in the best interest of Illumina and
its shareholders, whether that be a sale to Roche, a sale to another party,
proceeding as a standalone business or any other potential alternatives

[] The nominees are not being asked to make a decision now, nor to give any
commitment to Roche, with respect to Roche's offer for Illumina

-- Roche has not given them any information with respect to its strategy, nor
has it asked them to pass any judgment on its offer price

36





 
 
 

 
 
 

Executive Summary

Offer Summary

Illumina Growth Perspectives

Illumina Share Price Perspectives Offer Price Rationale Next Steps

Conclusion 37





 
 
 

 
 
 

Roche's Offer Represents Value Certainty Amidst Significant Headwinds

[] $51.00 all-cash offer provides attractive value today for Illumina
shareholders

-- Roche to hold all risk related to increasing competitive pressures and
tightening fiscal policy related to government funding

-- Removes execution risk around shift in customer and geographic focus

[] Illumina has little experience in regulated areas such as diagnostics that
require significant biological expertise as well as interactions with the FDA

-- Not contingent on financing

-- Roche stands ready, willing, and able to engage in substantive dialogue with
Illumina

[] Can move quickly through accelerated due diligence to reach a negotiated
agreement

[] Extensive team from Roche and its advisors ready to engage

38





 
 
 

 
 
 

Appendix





 
 
 

 
 
 

Key Claims



     Key Claims Made by Illumina to its Shareholders                        Roche's Rationale for Illumina Shareholders
[] Illumina and its industry as a whole have substantial growth []  Due to worldwide economic constraints and Illumina's sales
   opportunities                                                    dependency on public research institutions, analysts have a
                                                                    diminishing outlook on Illumina and the sector as a whole
[] Illumina has a promising product portfolio                   []  Illumina management recently issued its lowest growth guidance
                                                                    ever
                                                                []  The median analyst price target pre-offer was $34
                                                                []  Under Roche, Illumina has more attractive long-term growth
                                                                    potential
[] Roche is attempting to take advantage of depressed stock     []  Implied 21.6x LTM EBITDA and 6.5x LTM Revenue multiples are
   levels                                                           highly attractive relative to comparable precedent transactions
                                                                []  Implied 34.2x 2012E earnings and 2.06x 2012E P/E/G multiples
                                                                    are highly attractive relative to comparable company trading
                                                                    multiples
                                                                      - Implied 2.06x 2012E P/E/G represents a 16% premium to the
                                                                          3-year high
[] Illumina management has a proven track record                []  Illumina missed quarterly earnings twice in 2011
                                                                []  In the face of a declining market price, Illumina's lack of
 share or
                                                                    warrant repurchase activity calls into question Illumina's
 belief
                                                                    that its Q4 stock price is a "temporary dislocation"
[] Roche's offer conditions create uncertainty                  []  Roche's offer provides attractive value and certainty for
 Illumina
                                                                    shareholders
                                                                []  Highly qualified independent director nominees to act in best
                                                                    interests of Illumina shareholders
                                                                []  Many of the conditions are within the control of the Illumina
 Board
                                                                    to satisfy


Source: FactSet, Capital IQ, I/B/E/S consensus, Bloomberg.
Note: LTM as of 12/31/2011.


40





 
 
 

 
 
 

Summary Evaluation of Offer Price

[] Higher cash value relative to Illumina's unaffected share price,
particularly in a period of market uncertainty

-- Implies 1-day, 1-week and 1-month average premiums of 88%, 90% and 84%,
respectively (1)

-- Since 2006, similar life sciences tools industry transactions have seen
average premiums between 30% and 40% over similar periods (2)

[] Above transaction premiums paid in precedent unsolicited transactions

-- Comparable transaction set includes median premiums to the unaffected stock
price prior to announcement of 54%, 51% and 49% for 1-day, 1-week and 1-month,
respectively (3)

[] Implies a valuation multiple of 34.2x 2012E net income, which is higher than
the company's publicly traded peers (4)

-- Core comparable set exhibits median multiples of 16.4x 2012E net income (5)

-- Offer implies a P/E/G ratio of 2.06x, which is higher than all of Illumina's
peers

[] Implies 1-day and 1-month average premiums of 88% and 84%, respectively, and
LTM revenue and EBITDA multiples of 6.5x and 21.6x, respectively, which are
above precedent life science tools transactions (1)(2)(6)

-- The precedent transactions have median 1-day and 1-month average premiums to
the unaffected stock price of 33% and 37%, respectively and LTM revenue and
EBITDA multiples of 3.3x and 16.0x, respectively

[] Exceeds median Wall Street research analyst price target of $34.00 as of
January 23, 2012


Source: FactSet, Capital IQ, I/B/E/S consensus, Bloomberg.
(1) Premiums based on unaffected closing share price of $27.17 on 12/21/2011,
the day prior to market rumors about a potential acquisition of Illumina by
Roche.
(2) Includes selected announced, closed and effective transactions with targets
in the biotechnology research equipment manufacturers and biological products
and life sciences tools and services manufacturers sectors since 2006.
(3) Includes unsolicited transactions in all sectors over $1 billion with U.S.
targets since 2000. (4) Based on I/B/E/S consensus.
(5) Includes Thermo Fisher, Becton, Dickinson, Agilent, Life Technologies,
Sigma-Aldrich, Waters, Mettler-Toledo, Qiagen, PerkinElmer, Bio-Rad
Laboratories, Bruker and Techne.
(6) LTM as of 12/31/2011.


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ADDITIONAL INFORMATION AND WHERE TO FIND IT

THESE MATERIALS ARE FOR INFORMATIONAL PURPOSES ONLY AND DO NOT CONSTITUTE AN
OFFER TO PURCHASE OR A SOLICITATION OF AN OFFER TO SELL ILLUMINA COMMON STOCK.
THE TENDER OFFER IS BEING MADE PURSUANT TO A TENDER OFFER STATEMENT ON SCHEDULE
TO (INCLUDING THE OFFER TO PURCHASE, LETTER OF TRANSMITTAL AND OTHER RELATED
TENDER OFFER MATERIALS) FILED BY ROCHE WITH THE SECURITIES AND EXCHANGE
COMMISSION (SEC) ON JANUARY 27, 2012. THESE MATERIALS, AS THEY MAY BE AMENDED
FROM TIME TO TIME, CONTAIN IMPORTANT INFORMATION, INCLUDING THE TERMS AND
CONDITIONS OF THE OFFER, THAT SHOULD BE READ CAREFULLY BEFORE ANY DECISION IS
MADE WITH RESPECT TO THE TENDER OFFER. INVESTORS AND SECURITY HOLDERS MAY
OBTAIN A FREE COPY OF THESE MATERIALS AND OTHER DOCUMENTS FILED BY ROCHE WITH
THE SEC AT THE WEBSITE MAINTAINED BY THE SEC AT WWW.SEC.GOV. THE OFFER TO
PURCHASE AND RELATED MATERIALS MAY ALSO BE OBTAINED FOR FREE BY CONTACTING THE
INFORMATION AGENT FOR THE TENDER OFFER, MACKENZIE PARTNERS, AT (212) 929-5500
OR (800) 322-2885 (TOLL-FREE).

ROCHE HAS FILED A PROXY STATEMENT ON SCHEDULE 14A AND OTHER RELEVANT DOCUMENTS
WITH THE SEC IN CONNECTION WITH ITS SOLICITATION OF PROXIES FOR THE 2012 ANNUAL
MEETING OF ILLUMINA (THE "PROXY STATEMENT"). ROCHE HAS MAILED THE PROXY
STATEMENT AND A PROXY CARD TO EACH ILLUMINA STOCKHOLDER ENTITLED TO VOTE AT THE
2012 ANNUAL MEETING. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE PROXY
STATEMENT CAREFULLY AND IN ITS ENTIRETY AND ANY OTHER RELEVANT DOCUMENTS FILED
WITH THE SEC BECAUSE THEY CONTAIN IMPORTANT INFORMATION. INVESTORS AND
SECURITY HOLDERS MAY OBTAIN A FREE COPY OF THESE MATERIALS AND OTHER DOCUMENTS
FILED BY ROCHE WITH THE SEC AT THE WEBSITE MAINTAINED BY THE SEC AT
WWW.SEC.GOV. THE PROXY STATEMENT AND RELATED MATERIALS MAY ALSO BE OBTAINED FOR
FREE BY CONTACTING THE INFORMATION AGENT FOR THE TENDER OFFER, MACKENZIE
PARTNERS, AT (212) 929-5500 OR (800) 322-2885 (TOLL-FREE).

ROCHE HOLDING LTD, CKH ACQUISITION CORPORATION AND THE INDIVIDUALS NOMINATED BY
CKH ACQUISITION CORPORATION FOR ELECTION TO ILLUMINA'S BOARD OF DIRECTORS (THE
"ROCHE NOMINEES") MAY BE DEEMED TO BE PARTICIPANTS IN THE SOLICITATION OF
PROXIES FROM ILLUMINA STOCKHOLDERS FOR USE AT THE 2012 ANNUAL MEETING OF
STOCKHOLDERS, OR AT ANY ADJOURNMENT OR POSTPONEMENT THEREOF. INFORMATION
REGARDING THE DIRECTORS AND EXECUTIVE OFFICERS OF ROCHE HOLDING LTD AND CKH
ACQUISITION CORPORATION WHO MAY BE PARTICIPANTS IN THE SOLICITATION OF PROXIES
CAN BE FOUND IN THE DEFINITIVE PROXY STATEMENT. NO ADDITIONAL COMPENSATION WILL
BE PAID TO SUCH DIRECTORS AND EXECUTIVE OFFICERS FOR SUCH SERVICES. INVESTORS
AND SECURITY HOLDERS CAN OBTAIN ADDITIONAL INFORMATION REGARDING THE
DIRECT AND INDIRECT INTERESTS OF THE ROCHE NOMINEES AND OTHER PARTICIPANTS BY
READING THE DEFINITIVE PROXY
STATEMENT.
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