SCHEDULE 14A
                    Proxy Statement Pursuant to Section 14(a)
            of the Securities Exchange Act of 1934 (Amendment No. __)


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Check the appropriate box:

[ ]  Preliminary Proxy Statement
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     Rule 14a-6(e)(2))
[ ]  Definitive Proxy Statement
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[X]  Soliciting Material Pursuant to ss. 240.14a-12

                                Biogen Idec Inc.
                (Name of Registrant as Specified In Its Charter)

                                  Carl C. Icahn
                               Alexander J. Denner
                               Richard C. Mulligan
                                 Thomas F. Deuel
                                 David Sidransky
                                    Mayu Sris
                                    Eric Ende
                                 Jeffrey Meckler
                                Icahn Partners LP
                          Icahn Partners Master Fund LP
                        Icahn Partners Master Fund II LP
                        Icahn Partners Master Fund III LP
                         High River Limited Partnership
                                 Barberry Corp.
                             Hopper Investments LLC
                                Icahn Offshore LP
                                Icahn Onshore LP
                                Icahn Capital LP
                                   IPH GP LLC
                         Icahn Enterprises Holdings L.P.
                           Icahn Enterprises G.P. Inc.
                                  Beckton Corp.
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (check the appropriate box):

[X] No fee required.

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On May 11, 2009, the Participants (as defined below), distributed a presentation to stockholders of Biogen Idec Inc. It is attached hereto as Exhibit I and is incorporated herein by reference. SECURITY HOLDERS ARE ADVISED TO READ THE PROXY STATEMENT AND OTHER DOCUMENTS RELATED TO THE SOLICITATION OF PROXIES BY CARL C. ICAHN, ALEXANDER J. DENNER, RICHARD C. MULLIGAN, THOMAS F. DEUEL, DAVID SIDRANSKY, MAYU SRIS, ERIC ENDE, JEFFREY MECKLER, ICAHN PARTNERS LP, ICAHN PARTNERS MASTER FUND LP, ICAHN PARTNERS MASTER FUND II LP, ICAHN PARTNERS MASTER FUND III LP, HIGH RIVER LIMITED PARTNERSHIP, BARBERRY CORP. , HOPPER INVESTMENTS LLC, ICAHN OFFSHORE LP, ICAHN ONSHORE LP, ICAHN CAPITAL LP, IPH GP LLC, ICAHN ENTERPRISES HOLDINGS L.P. , ICAHN ENTERPRISES G.P. INC., BECKTON CORP. (COLLECTIVELY, THE "PARTICIPANTS") AND CERTAIN OF THEIR RESPECTIVE AFFILIATES FROM THE STOCKHOLDERS OF BIOGEN IDEC INC. FOR USE AT ITS ANNUAL MEETING WHEN AND IF THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION, INCLUDING INFORMATION RELATING TO THE PARTICIPANTS IN ANY SUCH PROXY SOLICITATION. WHEN AND IF COMPLETED, A DEFINITIVE PROXY STATEMENT AND A FORM OF PROXY WILL BE AVAILABLE TO STOCKHOLDERS OF BIOGEN IDEC INC. FROM THE PARTICIPANTS AT NO CHARGE AND WILL ALSO BE AVAILABLE AT NO CHARGE AT THE SECURITIES AND EXCHANGE COMMISSION'S WEBSITE AT HTTP://WWW.SEC.GOV. INFORMATION RELATING TO THE PARTICIPANTS IN A POTENTIAL PROXY SOLICITATION IS CONTAINED IN EXHIBIT II HERETO.

EXHIBIT I PLEASE SEE ATTACHED EXHIBIT 19.

EXHIBIT II PARTICIPANTS The participants in the solicitation of proxies (the "Participants") from stockholders of Biogen Idec Inc. ("Biogen" or the "Corporation") include the following: Mr. Carl C. Icahn, Icahn Partners LP, a Delaware limited partnership ("Icahn Partners"), Icahn Partners Master Fund LP, a Cayman Islands limited partnership ("Icahn Master"), Icahn Partners Master Fund II LP, a Cayman Islands limited partnership ("Icahn Master II"), Icahn Partners Master Fund III LP, a Cayman Islands limited partnership ("Icahn Master III"), High River Limited Partnership, a Delaware limited partnership ("High River"), Barberry Corp., a Delaware corporation ("Barberry"), Hopper Investments LLC, a Delaware limited liability company ("Hopper"), Beckton Corp., a Delaware corporation ("Beckton"), Icahn Enterprises G.P. Inc., a Delaware corporation ("Icahn Enterprises GP"), Icahn Enterprises Holdings L.P., a Delaware limited partnership ("Icahn Enterprises Holdings"), IPH GP LLC, a Delaware limited liability company ("IPH"), Icahn Capital LP, a Delaware limited partnership ("Icahn Capital"), Icahn Onshore LP, a Delaware limited partnership ("Icahn Onshore"), Icahn Offshore LP, a Delaware limited partnership ("Icahn Offshore"), Dr. Alexander J. Denner, Dr. Richard C. Mulligan, Dr. Thomas Deuel, Dr. David Sidransky, Mr. Mayu Sris, Dr. Eric Ende and Mr. Jeffrey Meckler. The address of Icahn Partners, High River, Barberry, Hopper, Icahn Enterprises GP, Icahn Enterprises Holdings, Beckton, IPH, Icahn Capital, Icahn Onshore and Icahn Offshore is White Plains Plaza, 445 Hamilton Avenue - Suite 1210, White Plains, NY 10601. The address of Icahn Master, Icahn Master II and Icahn Master III is c/o Walkers SPV Limited, P.O. Box 908GT, 87 Mary Street, George Town, Grand Cayman, Cayman Islands. Mr. Icahn's, Dr. Denner's, Mr. Sris', Dr. Ende's and Mr. Meckler's business address is c/o Icahn Associates Corp., 767 Fifth Avenue, 47th Floor, New York, NY 10153. Dr. Mulligan's business address is Harvard Gene Therapy Initiative, Harvard Institutes of Medicine, Suite 407, 4 Blackfan Circle, Boston, MA 02115. Dr. Deuel's business address is The Scripps Research Institute, MEM 268, 10550 North Torrey Pines Road, La Jolla, CA 92037. Dr. Sidransky's business address is Johns Hopkins University - Cancer Research Building II, 1550 Orleans Street, Suite 503, Baltimore, MD 21231. Icahn Partners, Icahn Master, Icahn Master II, Icahn Master III and High River (collectively, the "Icahn Parties") are entities controlled by Mr. Icahn. Dr. Denner and Mr. Sris. are employees and/or officers and directors of the Icahn Parties and various other entities controlled by Mr. Icahn who may also participate in soliciting proxies from Biogen Stockholders. Dr. Ende and Mr. Meckler are consultants hired by the Icahn Parties. Dr. Denner, Mr. Sris, Dr. Ende and Mr. Meckler do not own beneficially any interest in securities of Biogen. Neither Dr. Denner nor Mr. Sris will receive any special compensation in connection with the solicitation of proxies. In connection with his employment by Mr. Icahn and his affiliated companies, Dr. Denner, among other employees, has a participatory interest in the profits and fees derived by Mr. Icahn and/or his affiliated entities from Icahn Partners, Icahn Master, Icahn Master II and Icahn Master III (collectively, the "Funds"). Because only a portion of such profit interests are distributed and because of their other investments in the Funds, Dr. Denner also has capital accounts in the Funds. Generally, in the aggregate, Dr. Denner's profit interests and capital accounts in the Funds entitle him to less than 2% of the profits generated by the Funds. Dr. Ende and Mr. Meckler are independent consultants retained by the Icahn Parties to solicit proxies and provide consulting services relating to this solicitation, and another solicitation of proxies by the Icahn Parties, as well as general consulting services relating to other investments by the Icahn Parties. Assuming the Annual Meeting of Biogen and the annual meeting relating to the other solicitation are each held in May and further assuming each contest is successful, the consulting agreements referenced herein may provide for payments to Dr. Ende and Mr. Meckler of up to approximately $325,000 in the aggregate. None of Dr. Richard C. Mulligan, Dr. Thomas Deuel or Dr. David Sidransky own beneficially any interest in the securities of Biogen. Each of Dr. Richard C. Mulligan, Dr. Thomas Deuel and Dr. David Sidransky have an interest in the election of directors at the Biogen 2009 Annual Meeting of Stockholders pursuant to a Nominee Agreement among each of Dr. Richard C. Mulligan, Dr. Thomas Deuel and Dr. David Sidransky and the Icahn Parties, pursuant to which the Icahn Parties have agreed to pay each of Dr. Richard C. Mulligan, Dr. Thomas Deuel and Dr. David Sidransky a fee of $25,000. Barberry is the sole member of Hopper, which is the general partner of High River. Beckton is the sole stockholder of Icahn Enterprises GP, which is the general partner of Icahn Holdings. Icahn Holdings is the sole member of IPH, which is the general partner of Icahn Capital. Icahn Capital is the general partner of each of Icahn Onshore LP and Icahn Offshore. Icahn Onshore is the general partner of Icahn Partners. Icahn Offshore is the general partner of each of Icahn Master, Icahn Master II and Icahn Master III. Each of Barberry and Beckton is 100 percent owned by Carl C. Icahn. As such, Mr. Icahn is in a position indirectly to determine the investment and voting decisions made by each of the Icahn Parties. As of 5:00 p.m. Eastern Standard Time on May 11, 2009, the Icahn Parties may be deemed to beneficially own, in the aggregate, 16,075,256 shares of common stock, par value $.0005 per share, issued by Biogen (the "Shares"), representing approximately 5.57% of the Corporation's outstanding Shares (based upon the 288,541,467 Shares stated to be outstanding as of April 6, 2009 by the Corporation in the Corporation's Proxy Statement filed with the Securities and Exchange Commission on April 27, 2009). High River has sole voting power and sole dispositive power with regard to 3,215,051 Shares. Each of Hopper, Barberry and Mr. Icahn has shared voting power and shared dispositive power with regard to such Shares. Icahn Partners has sole voting power and sole dispositive power with regard to 4,532,847 Shares. Each of Icahn Onshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn has shared voting power and shared dispositive power with regard to such Shares. Icahn Master has sole voting power and sole dispositive power with regard to 5,888,807 Shares. Each of Icahn Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn has shared voting power and shared dispositive power with regard to such Shares. Icahn Master II has sole voting power and sole dispositive power with regard to 1,761,077 Shares. Each of Icahn Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn has shared voting power and shared dispositive power with regard to such Shares. Icahn Master III has sole voting power and sole dispositive power with regard to 677,474 Shares. Each of Icahn Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn has shared voting power and shared dispositive power with regard to such Shares. Each of Hopper, Barberry and Mr. Icahn, by virtue of their relationships to High River, are deemed to beneficially own the Shares which High River directly beneficially owns. Each of Icahn Onshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn, by virtue of their relationships to Icahn Partners, are deemed to beneficially own the Shares which Icahn Partners directly beneficially owns. Each of Icahn Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn, by virtue of their relationships to Icahn Master, Icahn Master II and Icahn Master III, are deemed to beneficially own the Shares which Icahn Master, Icahn Master II and Icahn Master III directly beneficially own.

 

 

EXHIBIT I


Biogen Idec
Investor Presentation

May 2009

2

Special note regarding presentation

This presentation includes information based on data found in filings with the SEC, independent industry
publications and other sources.  Although we believe that the data is reliable, we do not guarantee the
accuracy or completeness of this information and have not independently verified any such information.  
We have not sought, nor have we received, permission from any third-party to include their information in
this presentation.

Many of the statements in this presentation reflect our subjective belief.  Although we have reviewed and
analyzed the information that has informed our opinions, we do not guarantee the accuracy of any such
beliefs.

Sections of this presentation refer to the experience of our nominees for director at Biogen Idec Inc.
during their tenure as directors of ImClone Systems Inc.  We believe their experience at ImClone was a
success and resulted in an increase in shareholder value that benefited all shareholders.  However, their
success at ImClone is not necessarily indicative of future results at Biogen Idec if our nominees were to
be elected to the Biogen Idec Board of Directors.

All stockholders of Biogen Idec are advised to read the definitive proxy statement, the gold proxy card
and other documents related to the solicitation of proxies by the Participants from the stockholders of the
Company for use at the 2009 annual meeting of stockholders of the Company because they contain
important information.  The definitive proxy statement and form of proxy along with other relevant
documents, are available at no charge on the SEC’s website at http://www.sec.gov or by contacting D.F.
King & Co., Inc. by telephone toll free at 1-800-769-4414 or by visiting their website at
http://www.dfking.com/BIIB.  In addition, the Participants will provide copies of the definitive proxy
statement without charge upon request.

3

Agenda

Situation Overview

Strategic failures

Operational failures

Business development failures

Research & development failures

Our Qualifications & Proposals

Biographies of our nominees

ImClone Systems case study

Proposals for Biogen Idec

4

We strongly believe Biogen Idec needs better
management

Biogen Idec has a collection of valuable assets

AVONEX for relapsing multiple sclerosis and TYSABRI for MS and Crohn’s disease, $2.8B of 2008 sales

RITUXAN for B-cell non-Hodgkin’s lymphoma and rheumatoid arthritis, $1.1B of 2008 sales

Promising pipeline (BG-12, Lixivaptan, ADENTRI, etc.) and biologics manufacturing facilities

Board and management have failed to achieve the full potential of Biogen Idec

Biogen – IDEC merger has not created much value

Management has failed shareholders strategically and operationally

Weak business development and research & development efforts inhibit company’s prospects

Quality of board and management especially crucial today

R&D organization needs to be reinvigorated; Strategic review of pipeline needs to be conducted

Cost structure needs to be examined and partner relations need to be revitalized

Product sales growth likely to slow

Board needs to evaluate possibility of separating assets in order to enhance value

Management not aligned with shareholder interests

Electing our directors could maximize shareholder value

Our slate will press hard for management accountability and will provide experienced oversight

Our nominees’ experience with ImClone Systems useful to Biogen Idec

Specifically, we recharged partner relations, optimized the cost structure and rebuilt the pipeline

Better management of Biogen Idec assets will
enhance value for all shareholders

5

We believe leadership has failed on many dimensions

6

Biogen and IDEC supposedly merged to accelerate
growth & create shareholder value

Source: Company documents

“Bringing our companies together accelerates both companies' strategic plans
and creates a biotechnology leader with the products, pipeline, infrastructure
and financial resources to grow faster and
create sustainable shareholder
value
beyond what either company could achieve separately.”

  James Mullen, Chairman and CEO of Biogen

Strategy

Operational

Bus. Dev.

R&D

7

However, merger has failed to create much value

Note: Current price from April 2009; Change in equity value is growth from Q4 2003 to April 2009

Source: Bloomberg; Company documents

Biogen - IDEC
merger closed
Nov. 2003

Strategy

Operational

Bus. Dev.

R&D

8

Announced merger synergies never materialized

Note: 2003 operating expenses based on first nine months of 2003 annualized (pre-merger); $75M target synergies based on
$300M cumulative target for 2004-2007

Source: Company documents

Expenses
exceeded
target by
$276M

Strategy

Operational

Bus. Dev.

R&D

9

Management turnover makes consistent strategy and
execution difficult

Note: Bold & shading denotes

turnover since 2003

Source: Company documents

Lack of management continuity helps
contribute to lack of consistent strategy

Strategy

Operational

Bus. Dev.

R&D

10

We believe leadership has failed on many dimensions

Strategy

Operational

Bus. Dev.

R&D

11

AVONEX lost US market leadership to COPAXONE,
others also grew market share

Note: Data for US; Market share based on number of prescriptions

Source: Deutsche Bank

AVONEX lost 14% market share and ceded
US market leadership to COPAXONE

Strategy

Operational

Bus. Dev.

R&D

12

Biogen Idec has failed to manage Avonex product
lifecycle

Source:  FDA; Company documents

?

Strategy

Operational

Bus. Dev.

R&D

13

AMEVIVE never lived up to management hype

Source: North Carolina Biotechnology Center, Feb. 2003; Company documents

After failing to achieve April 2003 projections,
management sold AMEVIVE for $60M in March 2006

Strategy

Operational

Bus. Dev.

R&D

14

TYSABRI goals also overly aggressive

Source: Reuters, Feb. 2009; Company documents

In Sep. 2007, management expected 100K patients on TYSABRI by
2010 year-end; In Feb. 2009, management said it would be “difficult” to
achieve the original 100K projection

Strategy

Operational

Bus. Dev.

R&D

15

Five year stock performance has trailed peer group

Note: BTK represents AMEX Biotechnology Index

Source: Bloomberg; Company documents

Biogen Idec has underperformed peers

Strategy

Operational

Bus. Dev.

R&D

16

We believe leadership has failed on many dimensions

Strategy

Operational

Bus. Dev.

R&D

17

Business development vital to future prospects

Companies must defend and strengthen franchises within core
therapeutic areas

It seems Biogen Idec has done very little to defend or
strengthen its oncology and MS franchises

Competitors active in both therapeutic areas

Lack of business development limits future growth prospects

Strategy

Operational

Bus. Dev.

R&D

18

Is Biogen Idec defending its MS franchise?

Source: InVivo Deals database

Biogen Idec has not participated in any of the approximately
dozen multiple sclerosis business development opportunities
over the last year

Competitor MS deals in 2008 included:

Acquirer

Merck Serono

Novartis

Merck Serono

Teva

Eli Lilly

Counterparty

Apitope Technology

Peptimmune

Bionomics AGM

Antisense Therapeutics

BioMS Medical

Strategy

Operational

Bus. Dev.

R&D

19

Is it defending the oncology franchise?

Source: InVivo Deals database

Biogen Idec has executed only one of the approximately 150
cancer business development opportunities over the last year

Competitor oncology deals in 2008 included:

Acquirer

Bristol Myers

Roche                               

Pfizer

Merck

Sanofi Aventis

Counterparty

Exelixis

ThromboGenics

Aureon Laboratories

Celera

Dyax Corp.

Strategy

Operational

Bus. Dev.

R&D

20

Management has completed only five product in-
licensing deals in five years

Source: Company documents

Suboptimal licensing efforts over
last 5 years

Strategy

Operational

Bus. Dev.

R&D

21

We believe leadership has failed on many dimensions

Strategy

Operational

Bus. Dev.

R&D

22

Biogen Idec research and development productivity
worst in peer group

Note: 5 and 10 year charts represent cumulative gross profits and R&D spending

Source: Company documents

Strategy

Operational

Bus. Dev.

R&D

23

Lack of R&D focus apparent when comparing employee
base with peers

Note: Employees as of December 2008; Genentech estimate based on estimated retention costs

Source: Company documents; Industry estimates

Strategy

Operational

Bus. Dev.

R&D

24

Failure to advance pipeline

Note: Bold & shading denotes

no apparent progress since 2006

Source: Company documents

Pipeline has made little progress

Strategy

Operational

Bus. Dev.

R&D

25

Biogen Idec is the only major biotech company with no
new drugs since 2004

Source: FDA

Strategy

Operational

Bus. Dev.

R&D

26

During that same period, 23 new oncology drugs  have
been launched

Source: CenterWatch

Strategy

Operational

Bus. Dev.

R&D

27

Pipeline seems to lack strategic focus

Source: Company documents

Strategy

Operational

Bus. Dev.

R&D

28

PEGylation is hardly a breakthrough

Note: Enzon launched Adagen in 1990

Source: FDA

PEGylation was a mature, established technology in the 1990’s; Adagen approved in 1990

19 years after launch of first PEGylated protein, Biogen Idec still has not launched PEG-IFNB

?

Strategy

Operational

Bus. Dev.

R&D

29

CEO Mullen paid well despite poor performance and
failures across many dimensions

Note: Equity compensation = stock + option grants as valued in relevant proxy

Source: Company documents

30

James Mullen sold ~$85M of stock since merger at
average price of ~$59 per share

Source: Company documents

*

Represents stock sales by James Mullen

31

Are board and management aligned with you?

In our opinion, management ran a flawed auction process last
year

Board severely limited due diligence opportunities

Refused to allow bidders access to Elan until bidders submitted a firm and
binding offer

At least one bidder was denied its request to speak with Elan which may
have caused that bidder to walk away from the process

Board minutes that Biogen provided to us under court order last year show
what we consider to be a poorly designed process that lacked active Board
oversight

Same management and Board that ran the 2007 sales process
continue to run the company today.  How would they treat a
bidder in 2009?  Is shareholder value a priority for this Board?

32

Who is most aligned with your interests?

Source: Company documents

33

Agenda

Situation Overview

Strategic failures

Operational failures

Business development failures

Research & development failures

Our Qualifications & Proposals

Biographies of our nominees

ImClone Systems case study

Proposals for Biogen Idec

34

Our nominees helped deliver results at ImClone

35

ImClone shares dramatically outperformed during new
executive committee tenure

Note: Executive committee of Alex Denner and Richard Mulligan formed Oct. 2006; ImClone Systems sold to Eli Lilly in Nov.
2008

Source: Bloomberg

36

Long term focus to build ImClone shareholder value

Note: Graph represents month-end stock and index prices

Source: Bloomberg

Alex Denner
becomes
chairman of
executive
committee

ImClone receives
and rejects
takeover bid

ImClone acquired
by Eli Lilly for $70
per share

July 31, 2008
ImClone receives
$60 offer from
Bristol-Myers Squibb

Bristol-Myers
Squibb & ImClone
expand ERBITUX
development

37

New executive committee enhanced value at ImClone

New executive committee, including Alex Denner and Richard Mulligan, formed in
October 2006

Embarked on a comprehensive review of the company’s operations which led to
the following courses of action:

Recharged partner relations

Optimized cost structure

Rebuilt product pipeline

Changed culture

Settled litigation

38

Recharged ImClone partner relations and optimized
cost structure

Note: CRO’s = Contract Research Organizations

Recharged partner relations

Partnership with Bristol-Myers Squibb had deteriorated due to prior management neglect

Initiated dialogue and led negotiations, ultimately leading to new agreement with Bristol-
Myers Squibb that expanded Erbitux’s development with no change to ImClone economics

From 2005 to 2007, ERBITUX sales grew by 41% annually and ImClone royalty revenue
grew by 37% annually

Optimized cost structure

ImClone cost structure had not been appropriate for company needs

Executive committee reallocated costs, shifting SG&A spending by expanding sales force for
tactical reasons while reducing overhead costs

Margin expansion and capex reduction led to substantial free cash flow growth

Increased spending on R&D and salesforce was funded through savings on corporate costs
(re-negotiating with CROs, transportation costs, smarter purchasing, etc.)

39

Rebuilt pipeline, changed culture and settled litigation

Rebuilt product pipeline

Industry had poor perception of ImClone pipeline and research and development efforts

Executive committee conducted top-down review of pipeline

Significantly increased investments in particularly promising candidates such as 1121B,
A12, 11F8 and others

Cancelled programs where the return on investment was poor

Pipeline cited as major strategic rationale for whole company acquisition

Changed culture

ImClone morale poor due to lack of strategic direction from prior management

Took steps to institute a new culture

Emphasis on cash flow

Investment in R&D

Gave responsibility to scientists and clinicians

Settled litigation

Settled litigation including Yeda, Abbott and Repligen

40

From 2005 to 2007, ImClone royalty revenue grew by
37% annually

Note: 2005 most recent full year prior to formation of new executive committee; 2007 most recent full year available; Collab.
reimb. represents collaborative agreement reimbursements;  Manuf. represents manufacturing revenues

Source: UBS, January 2008; UBS, April 2008; Company documents

41

Tighter cost controls contributed to higher free cash
flow

Note: 2005 most recent full year prior to formation of new executive committee; 2007 most recent full year available; EBIT
excludes one-time charges; FCF represents free cash flow; Capex represents capital expenditures; FCF = EBITDA -
Capex

Source: Company documents

42

Increased R&D investment to improve pipeline and
future competitive position

Note: 2005 most recent full year prior to formation of new executive committee; 2007 most recent full year available

Source: Company documents

43

Increased R&D investment improved pipeline

Phase 1

Phase 2

Phase 3

1121b:

2005 status

2008 status

A12:

2005 status

2008 status

11F8:

2005 status

2008 status

18F1:

Pre-clinical

2008 status

UCB:

2005 status

Exited

44

We believe ImClone and Biogen Idec situations
analogous

Electing our directors with directly relevant
experience could help Biogen Idec

45

We have several proposals

Board should study potential splitting of Biogen IDEC into
neurology-focused and cancer-focused companies

Examine cost structure

Prioritize, improve focus, and re-invigorate R&D efforts

Improve partner relationships

46

Board should evaluate whether separating assets will
enhance value

NF Co. had $2,926M of 2008 sales

NF Co. assets include the following:

Key products include AVONEX and
TYSABRI

Related pipeline such as BG-12, Lixivaptan,
ADENTRI and other neurology and
cardiovascular product candidates

Biologics manufacturing plants in North
Carolina, Massachusetts and Denmark

Majority of existing research & development
infrastructure and sales force

Collaboration with Elan on TYSABRI

NF Co. will benefit from improved focus
on core neurology competency

Neurology-Focused Company

CF Co. had $1,172M of 2008 sales

CF Co. assets include the following:

Key products include RITUXAN and
FUMADERM

Related pipeline such as galixibam,
lumiliximab, ocrelizumab and other oncology
and autoimmune product candidates

Collaboration with Genentech in the US,
Zenyaku and Chugai in Japan and Roche in
the rest of the world

CF Co. will benefits from improved focus
on core oncology competency

Cancer-Focused Company

Separating Biogen assets will enhance shareholder value as
management focus should improve and disparate assets appeal to
different buyers

47

Separated assets have different growth profiles

Source: Goldman Sachs, March 2009; Company documents

48

Separated assets viable as standalone companies

49

Overhead spending can be reduced

Note: Peer group includes Genentech, Amgen, Gilead Sciences and Celgene

Source: Company documents

In 2008, Biogen Idec spent 23% of sales
on selling, general and administrative
expenses

Median biotech company = 21%

Best in class company = 15%

Reducing overhead spending will
improve cash flows

Applying median SG&A % of sales
generates $46M of cost savings

Applying best in class SG&A % of sales
generates $309M of cost savings

Overhead assumptions

50

We would push hard to reinvigorate R&D and improve
productivity

Identify most promising products

Focus investment in key therapeutic areas

Rationalize pipeline products not part of overall strategy

51

Electing our directors could help maximize shareholder
value

Board and management have failed to achieve the full potential
of Biogen Idec

Quality of board and management especially crucial today

Electing our directors could help maximize shareholder value

Better management of Biogen Idec assets will
enhance value for all shareholders

52

We have shown that
management has failed
shareholders
strategically and
operationally, resulting in
a company not well
positioned for future
challenges!