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

VOLCANO CORP's ticker is and the CUSIP is 928645900. A total of 3 filers reported holding VOLCANO CORP in Q4 2014. The put-call ratio across all filers is - and the average weighting 0.0%.

Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of VOLCANO CORP
ValueSharesWeighting
Q4 2014$399,000
+1634.8%
22,300
+913.6%
0.01%
Q3 2014$23,000
-11.5%
2,200
+46.7%
0.00%
Q2 2014$26,000
-84.1%
1,500
-81.9%
0.00%
-100.0%
Q1 2014$164,000
-8.4%
8,300
+1.2%
0.00%0.0%
Q4 2013$179,000
+188.7%
8,200
+215.4%
0.00%
+200.0%
Q3 2013$62,000
-30.3%
2,600
-46.9%
0.00%
-50.0%
Q2 2013$89,0004,9000.00%
Other shareholders
VOLCANO CORP shareholders Q4 2014
NameSharesValueWeighting ↓
GROUP ONE TRADING, L.P. 22,300$399,0000.01%
SIMPLEX TRADING, LLC 39$21,0000.00%
Citadel Advisors 2,500$45,0000.00%
View complete list of VOLCANO CORP shareholders