Employee Benefit Highlights
Presented here is a brief summary of the benefits available to regular employees, subject to eligibility guidelines and
approvals. Please refer to detailed plan descriptions and the Employee Guide for more information. Details may change
without notice.
Benefit/Plan
Eligibility
Summary
Cost
Medical Insurance
Eligible on first day of
employment for regular
employees working at least
30 hours per week
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Pre-tax employee costs listed below
are per PAY PERIOD.
Blue Cross Blue Shield
Blue Care Elect
Preferred PPO
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www.bluecrossma.com
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Dental Insurance
Delta Dental
PPO Plus Premier
Eligible on first day of
employment for regular
employees working at least
30 hours per week
Preventive
-
Basic Restorative
-
Major Restorative -
www.deltamass.com
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Vision Insurance
EyeMed Vision Care
Eligible on first day of
employment for regular
employees working at least
30 hours per week
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www.eyemedvisioncare.com
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Life Insurance/
AD&D
Unum
www.unum.com
$15 co-pay for office visits
$50 emergency room co-pay
Out of network services covered at 80%
after deductible is reached
Deductible of $250 per individual, $500
per family per calendar year
Out of pocket maximum of $1,250 per
individual, $2,500 per family per calendar
year, including deductible and coinsurance
Prescription co-pay of $10/25/45
Eligible on first day of
employment for regular
employees working at least
30 hours per week

100% coverage
(no deductible)
80% coverage
(after deductible)
50% coverage
(after deductible)
SINGLE: $ 32.10
FAMILY: $ 84.19
Pre-tax employee costs listed below
are per PAY PERIOD.
SINGLE:
FAMILY:
$ 2.70
$ 8.18
Annual Deductible – Preventative: None
Basic & Major: $50 per person /$150 per
family per calendar year
$1,500 maximum per family member per
calendar year
Eye exams every 12 months with a $10
co-pay
Prescription glasses lenses every 12
months with a $25 co-pay
Contact lenses every 12 months with a
$130 allowance and 15% off the balance
Frames every 12 months with a $130
allowance and 20% off the balance
Laser Vision correction every 24 months
with a 15% discount off the retail price or a
5% discount off the promotion price
Pre-tax employee costs listed below
are per PAY PERIOD.
Basic Benefit equal to two times basic
annual salary
up to $900,000 maximum, with approved
statement of good health required for
amounts over $500,000
The Company pays 100% of the cost
of this benefit.
SINGLE:
FAMILY:
$ 3.38
$ 8.61
Supplemental Life
Insurance Plan
Unum
Eligible on first day of
employment for regular
employees working at least
30 hours per week
www.unum.com
Short Term Disability
Unum
www.unum.com
Long Term Disability
Unum
www.unum.com
Flexible Spending Accounts
Discovery Benefits
www.discoverybenefits.com
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Eligible on first day of
employment for regular
employees working at least
30 hours per week
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Eligible on first day of
employment for regular
employees working at least
30 hours per week
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Eligible on first day of
employment for all regular
employees
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Savings & Investment Plan
401(k) Plan
Eligible on first day of
employment for all regular
employees
Fidelity
www.netbenefits.com
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Stock Option Plan
Eligible on first day of
employment for all regular
employees
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Option to purchase additional life
insurance coverage for employee,
spouse, and children
Coverage is in addition to company
provided coverage
Payment through payroll deduction
Employee pays 100% of this benefit
on a post-tax basis.
Benefits payable after 7 day elimination
period and approval of claim by Unum
Benefits payable at 100% of weekly
earnings
Maximum period of 12 weeks
The Company pays 100% of the cost
of this benefit.
Benefits payable after 90 day elimination
period or the end of STD coverage and
approval of claim by Unum
Provides 60% of monthly earnings to a
maximum benefit of $15,000 per month
The Company pays 100% of the cost
of this benefit.
Ability to pay for certain medical and
dependent care expenses with pre-tax
dollars
Medical Care maximum deduction is
$2,550 annually
Dependent Care maximum deduction is
$5,000 annually per household.
Employee pays 100% of this benefit
on apre-tax basis.
Employees may contribute up to 15% of
pre-tax earnings or a maximum of $18,000
per year for 2015 ($24,000 for employees
age 50 or over).
Discretionary match of up to 50% of the
first 6% (3%) of employee contributions to
a maximum of $5,250
The quarterly match, if declared, will be
made with Alnylam stock.
Employee pays 100% of the
contribution.
The company has reserved a designated
number of shares of its common stock for
issuance to employees under the
Alnylam Pharmaceuticals, Inc. Incentive
Stock Option Plan.
Please see HR for details
The Company pays 100% of
the match.
Employee Stock
Purchase Plan
For employees hired prior
to August 1, 2015, the next
entry date is November 1,
2015
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For employees hired after
August 1, 2015 the next
entry date is May 1, 2016
Vacation Time
Eligible immediately upon
employment if hire date is
on or prior to the 15th of the
month.
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Eligible on first day of first
full month of employment if
hire date is after the 15th of
the month.
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Sick Time
Eligible on first day of
employment
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Opportunity to purchase shares of Alnylam
common stock at a discount through
payroll deduction
Ability to withhold up to 15% of base
salary to purchase Alnylam Common
Stock at 85% of the lower of 1) the fair
market value per share of Common
Stock on your Entry Date, or 2) the fair
market value per share on the annual
purchase date.
Please see HR for details
Full-time regular employees accrue 15
days per year, accruing at the end of the
month at the rate of 1.25 days per month
(10 hours)
After 5 years at Alnylam, Full-time regular
employees accrue 20 days per year,
accruing at the end of the month at the
rate of 1.67 days per month (13.33
hours)
Part-time employees scheduled to work
over 20 hours per week will accrue
prorated vacation time at the end of each
month.
Maximum accrual of 15 days at any time
until 5 years of employment when
maximum accrual is 20 days.
The Company pays 100% of
this benefit.
Regular, full-time employees are eligible
for up to 6 days per year.
Part-time employees scheduled to work
over 20 hours per week will be eligible for
sick time on a pro-rated basis.
Carry over unused sick time up to the
maximum total of 10 days.
The Company pays 100% of the cost
of this benefit.
Maternity Leave
Eligible on first day of
employment
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Eligible for 8 weeks of full paid leave
With an additional 4 weeks of unpaid
leave
Please see HR for details
Paternity Leave
Eligible on first day of
employment

Eligible for 2 weeks of full paid leave
Please see HR for details
Holidays
Eligible immediately upon
employment for scheduled
holidays

Employees joining prior to
July 1 are eligible for the
floating holiday
Employee Assistance Plan
Eligible on first day of
employment
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Eligible on first day of
employment
The Company pays 100% of the cost
of this benefit.
2015 Holiday Schedule
Kathleen Greer Associates
https://kga.com
or toll free at 1-800-648-9557
Transportation Program
The Company observes 11 paid holidays
per year (10 scheduled and 1 floating
holiday)
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January 1
New Year’s Day
January 19
February 16
May 25
July 3
Martin Luther King, Jr. Birthday
Presidents’ Day
Memorial Day
Independence Day (observed)
September 7
Labor Day
October 12
November 26
Columbus Day
Thanksgiving Day
November 27
Day after Thanksgiving
December 25
Christmas
Provides professional and confidential
counseling to individual employees and
their household members, as well as
consultation, training and organizational
development services to managers and
supervisors.
Available 24 hours a day, 7 days a week
The Company pays 100% of the cost
of this benefit.
T-Pass Program: Alnylam will provide a
pass for transit to the Kendall Square or
Alewife T-stop
The Company pays 100% of the cost
of this benefit.
OR
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Subsidized Parking: Alnylam will subsidize
the monthly cost of a parking permit
The Company pays 75% for VP’s
and 90% for all other employees.
The Company pays 100% of the cost
of this benefit.
OR
Tuition Reimbursement
Eligible on first day of
employment for regular
employees working at least
30 hours per week
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Bike/Walk: Alnylam will add a benefit of
$20.00/month directly to your semimonthly pay.
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Reimbursement for pre-approved courses
with a minimum grade of C
(undergraduate) or B (graduate).
Courses must be related to one’s current
job, or be part of a job-related degree or
certificate program.
Alnylam will reimburse 100% for preapproved courses including tuition, books
and required fees.
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The Company pays 100% of the cost
of this benefit.
Fitness Benefit
Cambridge Racket and
Fitness Club
www.cambridgefitness.com
Eligible on first day of
employment for regular
employees working at least
30 hours per week
Cell Phone Discounts
AT&T
Verizon
Selectplus+
Sittercity and Years Ahead
www.decordova.org
Guaranteed Ride Home
The Company contributes $30/month
towards monthly membership.
The Company will reimburse up to
$360 per calendar year
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As an alternative, employees may choose
their own qualified health club and submit
for an equivalent reimbursement ($360)
once per calendar year
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Dell Employee Purchase Program Discount on Dell Computers through the
Employee Purchase program. Our
Member ID is HS35041388.
www.dell.com/epp
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CDW Employee Purchase Program –
Discount on technology products and
accessories.
www.cdw.com/epp
Our Access Code is A6EC8AE5
Eligible on first day of
employment for all
employees
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Discount on wireless monthly fees if you
sign up using your company e-mail
Please see IT for more details.
Eligible on first day of
employment for all
employees
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This membership provides access to
online caregiver profiles including,
nannies, babysitters, pet sitters, elder
care, and housekeeping/housesitting
services.
The Company pays 100% of the cost
of this benefit.
Eligible on first day of
employment for all
employees
This membership provides free unlimited
admission (with presentation of company ID) to
the Museum for all employees and immediate
family members, in addition to the benefits
listed below.
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Priority registration and Member
discount at the Museum School
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10% discount on all merchandise at
The Store @ deCordova
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10% discount at The Café @
deCordova
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20% discount on gallery rental fee
(Mon-Thurs)
The Company pays 100% of the cost
of this benefit.
Eligible on first day of
employment for all
employees
Employees must pre-register and only available
to those who carpool, vanpool, bike, walk, or
take transit at least two days per week
It encourages the use of alternatives to driving
alone by ensuring that if there is an emergency
during the day, you will not be stranded at
work.
The Company pays 100% of the cost
of this benefit.
Eligible on first day of
employment for all
employees
www.selectplus.com/alnylam
deCordova Art Museum
Discount on membership rates and
enrollment fee.
OR
BodyScapes Fitness
www.bodyscapesfitness.com
Computer/Technology
Discounts (for home use)
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Employee pays 100% of this benefit
Please see the security desk in the
lobby for more information.
Zipcar for Business
Eligible on first day of
employment for all
employees
The Zipcar for Business benefit reduces the
annual fee from $60 to $25. Also includes
discounted driving rates. Follow the link below
to sign up. Search for “Alnylam
Pharmaceuticals.”
Employee pays 100% of this benefit
Zipcar for Business Link
FedEx Office
Eligible on first day of
employment for all
employees
FedEx Office discounts are listed below.
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The Company pays 100% of the cost
of this benefit.
30% off black and white copies
30% off color copies
10% off other production services
Our Account number is 0000538710.
Amusement Park Discounts
Eligible on first day of
employment for all
employees
Amusement Park Discounts are listed below.
The Company pays 100% of the cost
of this benefit.
Six Flags New England
Special Ticket link:
https://sfsf.secure.accesso.com/embed/store.php?merc
hant_id=18794&emerchant_id=5029
Username: alnylam
Password: sixflags2
Water Country
Special Ticket link:
http://www.watercountry.com/_site/tickets.html?
promoCode=845022012
Use Promo Code: 845022012
Canobie Lake Park
Special Ticket link:
http://tickets.canobie.com/affiliate.asp?ID=B6E
03FB3-EBCB-4B93-B414-90DCA62B6581
Password: Econ167
Kimpton Hotel Discount
www.kimptonhotels.com
Eligible on first day of
employment for all
employees
The Kimpton Global Business program gives a
10% discount off the best available rate for
Alnylam Employees.
The Company pays 100% of the cost
of this benefit.
In the Global Business ID Field Enter:
GBP24125
Restaurant Discount
http://www.fujiatkendall.com/
Eligible on first day of
employment for all
employees
Fuji Restaurant – Kendall Square, located on
the ground floor at 300 Third Street, gives a
10% discount to Alnylam employees. Just
mention that you work here!
AND
AND
http://www.champions
cambridge.com/
Champions - The restaurant at the Cambridge
Marriott Hotel, gives 10% off for all Alnylam
Pharmaceuticals employees
Employee pays 100% of this benefit