GROUP ONE TRADING, L.P. - CATAMARAN CORP ownership

CATAMARAN CORP's ticker is and the CUSIP is 148887902. A total of 6 filers reported holding CATAMARAN CORP in Q4 2014. The put-call ratio across all filers is - and the average weighting 0.3%.

Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of CATAMARAN CORP
ValueSharesWeighting
Q2 2015$1,771,000
+60.0%
29,000
+55.9%
0.02%
+47.1%
Q1 2015$1,107,000
+154.5%
18,600
+121.4%
0.02%
+142.9%
Q4 2014$435,000
+245.2%
8,400
+180.0%
0.01%
+250.0%
Q3 2014$126,000
-82.7%
3,000
-81.8%
0.00%
-81.8%
Q2 2014$729,000
-75.1%
16,500
-74.7%
0.01%
-77.6%
Q1 2014$2,923,000
+4.2%
65,300
+10.5%
0.05%
+16.7%
Q4 2013$2,806,000
+465.7%
59,100
+447.2%
0.04%
+366.7%
Q3 2013$496,000
-76.6%
10,800
-75.2%
0.01%
-82.7%
Q2 2013$2,124,00043,6000.05%
Other shareholders
CATAMARAN CORP shareholders Q4 2014
NameSharesValueWeighting ↓
SPROTT INC. 350,000$20,839,0001.66%
ShearLink Capital, LLC 21,200$1,262,0001.14%
BloombergSen Inc. 310,000$18,457,0001.14%
GROUP ONE TRADING, L.P. 18,600$1,107,0000.02%
SIMPLEX TRADING, LLC 248$105,0000.01%
Timber Hill LLC 24,400$1,453,0000.01%
Citadel Advisors 70,300$4,186,0000.00%
View complete list of CATAMARAN CORP shareholders