SONUS NETWORKS INC

CUSIP: 835916107 Class: CMN

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

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

Q4 2014
Shares 508,300 Value ($000) $2,018 Avg Close — Range —
Q3 2014
Shares 508,300 Value ($000) $1,738 Avg Close — Range —
Q2 2014
Shares 508,300 Value ($000) $1,810 Avg Close — Range —
Q1 2014
Shares 508,300 Value ($000) $1,713 Avg Close — Range —
Q4 2013
Shares 508,300 Value ($000) $1,601 Avg Close — Range —