Here’s a look at June marketshare through OCC data.
June 2014 Total Options Marketshare
AMEX- 11.44%
BATS- 3.86%
BOX- 2.71%
CBOE- 28.10%
C2- 1.94%
GEM- 1.91%
ISE- 11.18%
MIAX- 3.31%
NOBO- 0.67%
NSDQ- 9.35%
NYSE Arca- 10.22%
OMX PHLX- 15.31%
June 2013 Total Options Marketshare
AMEX- 14.66%
BATS- 3.77%
BOX- 2.07%
CBOE- 26.74%
C2- 1.86%
ISE- 15.03%
MIAX- 0.95%
NOBO- 0.92%
NSDQ- 8.31%
NYSE Arca- 10.37%
OMX PHLX- 15.32%
June 2014 Equity Options Marketshare
AMEX- 12.50%
BATS- 4.30%
BOX- 3.03%
CBOE- 20.35%
C2- 2.15%
GEM- 2.13%
ISE- 12.42%
MIAX- 3.69%
NOBO- 0.75%
NSDQ- 10.40%
NYSE Arca- 11.23%
OMX PHLX- 17.05%
June 2013 Equity Options Marketshare
AMEX- 16.13%
BATS- 4.17%
BOX- 2.28%
CBOE- 19.31%
C2- 2.06%
ISE- 16.56%
MIAX- 1.06%
NOBO- 1.02%
NSDQ- 9.16%
NYSE Arca- 11.36%
OMX PHLX- 16.90%