GROUP ONE TRADING, L.P. - CEPHEID ownership

CEPHEID's ticker is and the CUSIP is 15670R957. A total of 2 filers reported holding CEPHEID 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 CEPHEID
ValueSharesWeighting
Q3 2016$1,786,000
+452.9%
33,900
+222.9%
0.02%
+375.0%
Q2 2016$323,000
-24.4%
10,500
-10.3%
0.00%
-20.0%
Q4 2015$427,000
+59.9%
11,700
+98.3%
0.01%
+25.0%
Q3 2015$267,000
-81.0%
5,900
-74.3%
0.00%
-80.0%
Q2 2015$1,406,000
+23.6%
23,000
+15.0%
0.02%
+11.1%
Q1 2015$1,138,000
+296.5%
20,000
+277.4%
0.02%
+350.0%
Q4 2014$287,000
+23.2%
5,3000.0%0.00%0.0%
Q3 2014$233,000
+4560.0%
5,300
+5200.0%
0.00%
Q1 2014$5,000
-75.0%
100
-80.0%
0.00%
Q3 2013$20,000
-85.5%
500
-87.5%
0.00%
-100.0%
Q2 2013$138,0004,0000.00%
Other shareholders
CEPHEID shareholders Q4 2014
NameSharesValueWeighting ↓
SIMPLEX TRADING, LLC 3$00.00%
Citadel Advisors 8,100$270,0000.00%
View complete list of CEPHEID shareholders