GROUP ONE TRADING, L.P. - ROCKWOOD HLDGS INC ownership

Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of ROCKWOOD HLDGS INC
ValueSharesWeighting
Q4 2014$229,000
+895.7%
2,900
+866.7%
0.00%
Q3 2014$23,000
-87.9%
300
-88.0%
0.00%
-100.0%
Q2 2014$190,000
-92.0%
2,500
-92.1%
0.00%
-92.5%
Q1 2014$2,366,000
+273.8%
31,800
+261.4%
0.04%
+300.0%
Q4 2013$633,000
+279.0%
8,800
+252.0%
0.01%
+233.3%
Q3 2013$167,000
-50.7%
2,500
-52.8%
0.00%
-62.5%
Q2 2013$339,0005,3000.01%
Other shareholders
ROCKWOOD HLDGS INC shareholders Q1 2015
NameSharesValueWeighting ↓
Timber Hill LLC 62,600$4,008,0000.02%
GROUP ONE TRADING, L.P. 5,300$339,0000.01%
KNIGHT CAPITAL GROUP LLC 5,300$339,0000.01%
STIFEL NICOLAUS & CO INC \MO\ 4,300$291,239,0000.01%
Citadel Advisors 42,600$2,728,0000.01%
View complete list of ROCKWOOD HLDGS INC shareholders