GROUP ONE TRADING, L.P. - SONUS NETWORKS INC ownership

SONUS NETWORKS INC's ticker is SONSXXXX and the CUSIP is 835916107. A total of 133 filers reported holding SONUS NETWORKS INC in Q4 2013. The put-call ratio across all filers is 2.21 and the average weighting 0.1%.

Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of SONUS NETWORKS INC
ValueSharesWeighting
Q1 2015$276,000
+157.9%
34,972
+30.2%
0.00%
+100.0%
Q4 2014$107,000
-65.1%
26,854
-70.1%
0.00%
-60.0%
Q3 2014$307,000
+30.6%
89,886
+37.2%
0.01%
+25.0%
Q2 2014$235,000
-28.8%
65,519
-33.1%
0.00%
-33.3%
Q1 2014$330,000
-60.1%
97,990
-62.7%
0.01%
-50.0%
Q4 2013$827,000
+281.1%
262,642
+309.6%
0.01%
+200.0%
Q3 2013$217,00064,1250.00%
Other shareholders
SONUS NETWORKS INC shareholders Q4 2013
NameSharesValueWeighting ↓
Empire Capital Management, L.L.C. 22,000,000$78,980,00014.12%
Archon Capital Management LLC 3,085,034$11,075,0003.72%
CENTRAL SECURITIES CORP 3,000,000$10,770,0002.23%
HARBER ASSET MANAGEMENT LLC 490,361$1,760,0002.03%
BRIGHTFIELD CAPITAL MANAGEMENT LLC 451,800$1,622,0002.01%
IRONWOOD INVESTMENT MANAGEMENT LLC 2,066,773$7,420,0001.18%
Walthausen & Co., LLC 4,036,850$14,492,0001.06%
Grandeur Peak Global Advisors, LLC 1,001,100$3,594,0000.78%
BTG Pactual Global Asset Management Ltd 1,333,750$4,789,0000.67%
Hilltop Park Associates LLC 150,000$539,0000.52%
View complete list of SONUS NETWORKS INC shareholders