ALNYLAM PHARMACEUTICALS INC

Ticker: ALNY CUSIP: 02043Q107 Class: EQTY

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

Note: Option positions (PUT/CALL) are excluded.

Q4 2014

Shares 58,620 Value ($000) $5,686 Avg Close $92.65 Range $72.80 - $111.49

Q3 2014

Shares 58,920 Value ($000) $4,602 Avg Close $64.51 Range $51.93 - $79.88

Q2 2014

Shares 65,530 Value ($000) $4,140 Avg Close $59.44 Range $47.03 - $71.40

Q1 2014

Shares 59,150 Value ($000) $3,971 Avg Close $77.42 Range $60.24 - $112.57

Q4 2013

Shares 64,080 Value ($000) $4,122 Avg Close $59.65 Range $48.16 - $67.97

Q3 2013

Shares 59,300 Value ($000) $3,796 Avg Close $49.85 Range $31.75 - $65.83

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	58,620	$5,686	$92.65	$72.80 - $111.49
Q3 2014	58,920	$4,602	$64.51	$51.93 - $79.88
Q2 2014	65,530	$4,140	$59.44	$47.03 - $71.40
Q1 2014	59,150	$3,971	$77.42	$60.24 - $112.57
Q4 2013	64,080	$4,122	$59.65	$48.16 - $67.97
Q3 2013	59,300	$3,796	$49.85	$31.75 - $65.83