SONUS NETWORKS INC

CUSIP: 835916107 Class: CMN

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q1 2015
Shares 34,972 Value ($000) $276 Avg Close — Range —
Q4 2014
Shares 26,854 Value ($000) $107 Avg Close — Range —
Q3 2014
Shares 89,886 Value ($000) $307 Avg Close — Range —
Q2 2014
Shares 65,519 Value ($000) $235 Avg Close — Range —
Q1 2014
Shares 97,990 Value ($000) $330 Avg Close — Range —
Q4 2013
Shares 262,642 Value ($000) $827 Avg Close — Range —
Q3 2013
Shares 64,125 Value ($000) $217 Avg Close — Range —