IRONWOOD PHARMACEUTICALS INC

Ticker: IRWD CUSIP: 46333X108 Class: COM CL A

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

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

Q4 2014

Shares 25,900 Value ($000) $397 Avg Close $11.44 Range $9.76 - $13.08

Q3 2014

Shares 25,900 Value ($000) $336 Avg Close $11.45 Range $10.03 - $13.36

Q2 2014

Shares 25,900 Value ($000) $397 Avg Close $10.87 Range $7.55 - $13.26

Q1 2014

Shares 25,900 Value ($000) $319 Avg Close $11.24 Range $9.40 - $12.96

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	25,900	$397	$11.44	$9.76 - $13.08
Q3 2014	25,900	$336	$11.45	$10.03 - $13.36
Q2 2014	25,900	$397	$10.87	$7.55 - $13.26
Q1 2014	25,900	$319	$11.24	$9.40 - $12.96