Document:

exv10w52

Exhibit 10.52

(Biogen Idec Logo)

April 1, 2009

Dear Bob:

I am pleased to confirm your promotion to Chief Operating Officer. This position will report to
Jim Mullen, President and CEO, and will be based at our Cambridge, Massachusetts facility.

The specific terms of your promotion are as follows:

Promotion Date: The effective date of your promotion is March 30, 2009.

Base Salary: Your biweekly salary will be $27,692.31, which is equivalent to an annual salary of
$720,000.06.

Annual Bonus Plan: Your target bonus opportunity under the Biogen Idec Annual Bonus Plan will be
75% of your annualized base salary. Please refer to the Plan documents for further details about
eligibility and payment provisions.

Long-Term Incentive: You will be granted Restricted Stock Units (RSUs) in connection with your
promotion. The RSU grant date will be the first trading day of the month following your effective
date of promotion. The approximate grant date value of your RSU grant will be $190,000. The number
of RSUs to be granted to you will be calculated by dividing $190,000 by the closing price of Biogen
Idec stock on the grant date, with the resulting number of shares rounded to the nearest five
shares. Assuming your continued employment, these RSUs will vest and convert into shares of Biogen
Idec common stock at the rate of one-third per year over three years, beginning on the first
anniversary of your grant date.

You will also be granted an option to purchase shares of the common stock of Biogen Idec at an
exercise price equal to the closing price of Biogen Idec stock on the grant date. The stock option
grant date will be the first trading day of the month following your effective date of promotion.
The approximate grant date value of your stock options will be $190,000. The number of stock
options to be granted to you will be calculated by dividing $190,000 by the result of multiplying
the closing price of Biogen Idec stock on the grant date by our Black-Scholes ratio of 37.6% with
the resulting number of shares rounded to the nearest five shares. The option will have a ten-year
term and, assuming your continued employment, will vest equally at the rate of one-fourth per year
over a four-year period, beginning on the first anniversary of your grant date.

You will also be granted Performance-Based Restricted Stock Units (“Granted PBRSUs”). The PBRSU
grant date will be the first trading day of the month following your effective date of promotion.
The approximate grant date value of your Granted PBRSUs will be $190,000. The number of Granted
PBRSUs will be calculated by dividing $190,000 by the closing price of Biogen Idec stock on the
grant date, with the resulting number of shares rounded to the nearest five shares. These Granted
PBRSUs will be fixed in number (i.e., become “Eligible PBRSUs”) based on the Company Multiplier for
2009 PBRSUs, as determined by the Compensation and Management Development Committee (CMDC) after
the conclusion of the 2009 PBRSU Performance Period. Assuming your continued employment, one-third
of the Eligible PBRSUs will vest and convert into shares of Biogen Idec common stock on the later
of the first anniversary of your grant date or the date on which the Company’s LTI Performance
Multiplier for 2009 is approved by the CMDC; the second and final one-thirds of the Eligible PBRSUs
will vest on the second and third anniversaries of your grant date.

The actual terms of your RSU, stock option and PBRSU grants will be communicated to you following
the grant date. Your grants will be awarded under the Biogen Idec Inc. 2008 Omnibus Equity Plan.
You are considered a “designated employee,” as defined in the 2008 Omnibus
Equity Plan. Our 2008 Omnibus

 

 

Equity Plan and Prospectus are available on iNet. Please read these documents for information about
your LTI grants.

Stock Trading Plan: As Chief Operating Officer, you are required to enter into a 10b5-1 stock
trading plan for all open market trades in Biogen Idec stock. A 10b5-1 plan allows you to buy or
sell Biogen Idec securities at pre-defined times and/or prices and provides an affirmative defense
against insider trading liability. More information on 10b5-1 trading plans is available on iNet.

Additional Executive Benefits

Vacation: You are entitled to 35 vacation days per year, accrued on a per pay period basis.

Supplemental Savings Plan: You are entitled to participate in Biogen Idec’s Supplemental
Savings Plan (SSP). This plan allows you to make pre-tax deferrals of up to 80% of your base
salary and up to 100% of your Annual Bonus payment and certain other eligible incentive
payments. Your contributions to this plan may be limited by your contributions towards other
plans (e.g., 401(k), ESPP, medical, etc.).

Life Insurance: You will be provided life insurance coverage equal to three times your annual
base salary, subject to meeting the medical standards stated in the group term life insurance
policy for U.S. employees. Biogen Idec pays the premium for this insurance. The IRS requires
employers to impute the value of company-paid life insurance for coverage over $50,000. This
imputed income will be displayed on your pay stub.

Severance: Under certain circumstances, you will be entitled to receive severance benefits.
Your severance benefits are explained in detail in the attached executive severance document.

IRC 280G Excise Taxes: In the event of a Change in Control (as defined in Section 280G of the
Internal Revenue Code), compensation paid to you may trigger an excise tax (in addition to
ordinary income taxes). Biogen Idec will reimburse you for any excise taxes you incur under
Section 280G as a result of a Change in Control. This includes gains from the exercise of stock
options and vesting of RSUs and PBRSUs, as well as the reimbursement for such penalties. In
addition, Biogen Idec will reimburse you for income taxes imposed on Biogen Idec’s reimbursement
of the excise taxes. This reimbursement will be paid to you as soon as administratively
practicable and, in any event, no later than December 31 of the year following the year in which
payment of any taxes for which Biogen Idec is providing reimbursement is made.

Tax Preparation, Financial and Estate Planning: You are entitled to reimbursement of up to
$7,500 per calendar year (January 1 — December 31) for expenses incurred due to tax preparation,
financial and/or estate planning services, as well as the purchase of tax preparation and/or
financial planning software. Reimbursement must be made no later than the end of the calendar
year following the year in which the expense is incurred, and must be requested within the
deadlines and processes established in the policy.

Air Travel Upgrade: You are entitled to fly first class on all U.S. transcontinental flights
(e.g., Boston to San Diego). Overseas flights and other domestic flights are subject to the same
policy as all other employees.

Your employment at Biogen Idec continues to be employment at-will. This means that just as you are
free to leave your employment at any time, with or without cause or notice, Biogen ldec also has
the same right to terminate your employment at any time, with or without cause or notice.

 

 

I am confident you will continue to contribute to Biogen Idec’s success and wish you the best of
luck in your new position.

Sincerely,

/s/ Craig Eric Schneier

Craig Eric Schneier, Ph.D.,

EVP, Human Resources, Public Affairs & Corporate Communications

			
	cc:	 	Jim Mullenexv10w58

Exhibit 10.58

(Biogen Idec Logo)

December 13, 2005

Dear Susan:

This is an Offer of Employment. I invite you to join our company as Executive Vice
President and General Counsel, at a biweekly wage of $16,153.85 (which is equivalent
to an annual wage of $420,000). This position will report directly to Jim Mullen,
Chief Executive Officer and be located in Cambridge, Massachusetts. Consistent with
Biogen Idec’s compensation policy, you will be eligible for a merit salary review and
equity grants early in 2007. You will participate in Biogen Idec’s lncentive Plan,
targeted at 50% of your eligible base annual salary. Your participation in the
lncentive Plan will commence on January 1, 2006. Additionally. you will participate
(on a prorated basis) in our February 2006 Long Term lncentive grant.

Upon employment, you will be granted an option to purchase up to 40,000 shares of the
common stock of Biogen ldec Inc., at an exercise price per share equal to the closing
sales price as reported on the Nasdaq National Market on the effective date of your
employment. The option will have a ten-year term and vest over a four-year period, at
the rate of 25% per year, starting on the anniversary of your effective date of
employment. The actual terms of the stock option will be communicated to you in a
separate stock option agreement or notice of grant.

Upon employment, you will be granted 10,000 restricted stock units, which will convert
to shares of common stock of Biogen ldec Inc. Management will recommend that one third
of these restricted stock units convert to shares of common stock on each of the
first, second, and third anniversary of your initial date of employment. The actual
terms of the restricted stock units will be communicated to you in a separate notice
of grant.

You will be able to choose from a menu of benefit options through our flexible
benefits program. These benefits include group health care, life, dependent life,
407(k) savings plan, and disability insurance, as well as two flexible spending
accounts for eligible medical or dependent care expenses. You are also entitled to 20
vacation days per year, accrued on a monthly pro-rated basis. Please visit Biogen
Idec’s benefits website (www.mybenerqy.com) to familiarize yourself with all
Biogen Idec’s benefits and HR guidelines.

Equity-based Awards: You are a “designated employee” for purposes of Biogen Idec’s
2005 Omnibus Equity Plan. Please read the Plan for more details about the rights of a
designated employee in the event of a corporate transaction or change in control,
including any applicable limitations.

You are encouraged to enter into a 10b5-1 trading plan, if you plan to buy or sell
Biogen ldec securities or exercise options. These types of plans, when executed
according to applicable provisions, enable you to sell Biogen ldec securities on
pre-specified conditions (e.g., when the price of a share of Biogen ldec common stock
reaches a certain amount) and, therefore, allow you to sell outside quarterly “trading
windows”, whether or not you then possess material, nonpublic information. (Please
note that Smith Barney, our stock plan administrator, charges fees for sales of Biogen
ldec securities pursuant to a 10b5-1 trading plan the same as for ordinary sales,
$0.06/share.)

Supplemental Savings Plan: You are entitled to participate in Biogen Idec’s
Supplemental Savings Plan (SSP). This plan allows you to defer receipt, on a pretax
basis, up to 80% of

 

 

December 13, 2005

Susan Alexander

Page 2

your base salary and up to 100% of your cash bonuses. Your contributions to this plan
may be limited by your contributions towards other plans (e.g., 401k, ESPP, medical,
etc.).

Life Insurance: Biogen ldec will provide you with life insurance coverage equal to
three times your base salary (maximum coverage up to $1 million), subject to your
successfully meeting the medical standards stated in the executive group term life
insurance policy for US employees. Biogen ldec will pay the premiums for this
insurance. As required by law, income will be imputed for insurance over IRS
limitations annually for this coverage.

Severance: You will receive a severance benefit of at least 12 months compensation (
as per the attached Executive Severance document; all other conditions of the document
remain applicable). Coverage under Biogen Idec’s group medical and dental insurance
plans will be provided in the event your employment is terminated by Biogen ldec for
reasons other than cause (as defined in the attached severance document). Your
severance benefits are also explained in greater detail in the attached severance
document.

IRC 280g Excise Taxes: In the event of a change in control (as defined in Section 280g
of the Internal Revenue Code), compensation paid to you may trigger an excise tax, in
addition to ordinary income taxes on that compensation, depending on that amount of
the compensation. Biogen ldec will reimburse you for excise tax penalties incurred by
you pursuant to IRC Section 280g on compensation paid by Biogen ldec as a result of a
change in control, including gains from the exercise of stock options and vesting of
restricted shares, as well as the reimbursement for such penalties.

Tax preparation and/or financial planning: Biogen ldec will provide you with an
allowance of up to $7,500 (beginning in calendar year 2006, and each year thereafter)
for use in the preparation of your Federal and/or state income taxes, for tax or
financial planning, for estate planning (including preparation of personal wills),
and/or for the purchase of tax preparation software. Invoices received from recognized
professionals will be reimbursed.

Employment with Biogen ldec is contingent on the satisfactory completion of a drug
test. Please see the attached documents for full information about our post-employment
offer drug-testing program. You may also be required to complete a medical history
review with our Occupational Health Department. It will be scheduled after your first
day of employment.

Biogen ldec requires that all new employees be subject to a background check. This
verification includes confirmation of employment history, educational and professional
licensing credentials, a criminal records check, and Social Security number search, as
well as any additional procedures that your job responsibilities at Biogen ldec may
warrant. When you complete your online Application for Employment, you will be
authorizing Biogen ldec to conduct this background check. If you have questions about
the background check, please speak to your Biogen ldec Recruiter for details.
Additionally, Biogen ldec requires all new employees to sign a Proprietary Information
and Inventions Agreement on the first day of employment.

In order to protect the Company’s substantial investment of time and money in the
creation and maintaining of its Confidential lnformation and good-will with its
customers, vendors and other business partners, as a condition of employment you will
be required to sign the Company’s Employee Proprietary lnformation and lnventions and
Dispute Resolution Agreement on your first day of employment. A copy of the agreement
is attached to this letter. Also, as we have explained to you, just as Biogen ldec
regards the protection of our trade secrets, and other confidential information as a
matter of great importance, we also respect that you may have an obligation to your
present and/or prior employers to safeguard the confidential information of those
companies. Biogen ldec respects these obligations, and expects you to honor them as
well. To that end, we expect that you will not take any

 

 

December 13, 2005

Susan Alexander

Page 3

documents or other confidential information from your employer if and when you
depart.

Further, we want to make perfectly clear you should not bring with you to Biogen Idec, or
use in the performance of your responsibilities for our Company, any proprietary business
or technical information, materials or documents of a former employee.

The Federal Government requires you to provide proper identification verifying your
eligibility to work in the United States. Please bring the appropriate identification,
including your Social Security card (for number verification purposes), with you on your
first day of employment.

Please confirm your acceptance of this Offer of Employment by signing this letter. Please
also sign the enclosed drug screen authorization form and return both signed documents to
Biogen Idec in the enclosed self-addressed, stamped envelope. The other copy of this letter
is for your records.

On behalf of Jim Mullen, we are very excited about the prospect of you joining Biogen Idec.
Your first date of employment will be set by mutual agreement.

Best regards,

	 	 	 	 
	 	 
	  /s/ Craig Schneier 	 	 
	Craig Schneier, PhD. 	 
	Executive Vice President, Human Resources 	 	 
	 

	cc:	 	Jim Mullen

Rick Fisher

Biogen ldec is an at-will employer. This means that just as you may resign your employment
at any time for any reason, Biogen ldec may terminate your employment at any time, with or
without cause, in its sole discretion.

I am pleased to accept the offer of employment and acknowledge the contingencies of
employment described above.

ACCEPTED:

	 	 	 	 	 
	/s/ Susan Alexander
	 	 
	 	1/30/06
	Susan Alexander
	 	 	 	Start Date*

 

			
	*	 	Your effective date of employment is subject to Biogen ldec HR’s receipt of negative
results (i.e., no drugs found) from your drug test. If you have not received negative test
result confirmation from Human Resources, please contact your Biogen ldec recruiter to
confirm results prior to starting. Your effective date of employment must be a Monday.
Please notify Human Resources as soon as possible of the Monday you can begin your
employment, and indicate this date on the signed offer letter you return.

ATTENTION: Please see the attached Important Information for New Employees

 

 

Executive Severance - Executive Vice President

As an Executive Vice President1, you are entitled to severance benefits in the event
your employment with Biogen Idec is terminated by Biogen Idec other than for cause. The severance
benefits will be comprised of (i) a lump sum payment and (ii) upon completion of the appropriate
forms, continuation of your participation in Biogen Idec’s group medical and dental insurance plans
pursuant to the provisions of the Consolidated Omnibus Budget Reconciliation Act of 1985 (COBRA)
and to the same extent that such insurance is provided to regular U.S. employees of Biogen Idec
(including payment by you of a portion of the insurance premiums). The lump sum payment,
equivalent to at least twelve months of annual base salary and a prorated portion of your target
annual performance bonus, will be calculated as follows:

[12 + (A x 2.5)] x B = lump sum payment

	 	 	 	 	 
	where:

	 	A
	 	is number of full years of service with Biogen Idec, but (A x 2.5) not more than 9
	 

	 	B
	 	is monthly annual compensation (i.e., one-twelfth of sum of annual base salary
plus target annual performance bonus).

The lump sum payment (less state and federal income and welfare taxes and other mandatory
deductions under applicable laws) will be paid to you promptly following the later of (i) the
termination of your employment with Biogen Idec and (ii) the effective date of a general release in
favor of Biogen Idec (see below). Your participation in Biogen Idec’s group medical and dental
insurance plans will continue until the earlier of (x) the date you become eligible to participate
in the medical and dental insurance plans of a third party employer or (y) the date that is [12 +
(A x 2.5), but not more than 21] months following the termination of your employment with Biogen
Idec, but in either case only to the extent permitted by the provisions of COBRA. For example:

	 	 	 	If your employment with Biogen Idec is terminated after two months, you will receive a lump
sum payment equal to twelve months of your monthly annual compensation and continue to
participate in Biogen Idec’s group medical and dental plans for twelve months, unless you
become eligible to participate in a third party employer’s medical and dental plans before
that date.

	 	 	 	If your employment with Biogen Idec is terminated after five years, you will receive a lump
sum payment equal to 21 months of your monthly annual compensation and continue to
participate in Biogen Idec’s group medical and dental plans for 21 months, unless you become
eligible to participate in a third party employer’s medical and dental plans before that
date.

If at any time within two years following a corporate transaction (as such term is defined in
Biogen Idec’s 2005 Omnibus Equity Plan) your employment with Biogen Idec is terminated by Biogen
Idec other than for cause, then, regardless of the length of your service with Biogen Idec and in
lieu of the formula set forth above, you will receive a lump sum payment equivalent to 24 months of
your prorated annual base salary and prorated target annual performance bonus. In addition, you
will be entitled to participate in Biogen Idec’s group medical and dental insurance plans for up to
24 months following the termination of your employment with Biogen Idec, subject to the conditions
(including earlier termination) set forth above.

For purposes of the severance arrangement, the definition of “for cause” is outlined in the Biogen
Idec 2005 Omnibus Equity Plan.

Payment and provision of the severance benefits described above are conditioned on your execution
of a general release in favor of Biogen Idec, in form and substance reasonably acceptable to Biogen
Idec, in respect of any and all claims relating to your employment and the termination of your
employment with Biogen Idec. If you retire or terminate your employment your employment with Biogen
Idec or Biogen Idec terminates your employment for cause or you do not provide the requisite
general release, then you not receive the severance benefits described above.

 

			
	1.	 	These severance benefits are applicable only to U.S. executives of Biogen Idec.

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