GROUP ONE TRADING, L.P. Information

440 S. LASALLE STREET, CHICAGO, Illinois, 60605, (312) 347-8864

Report Date: 03/31/2015

Position Statistics

Total Positions 1,819
New Positions 393
Increased Positions 767
Decreased Positions 1,008
Positions with Activity 1,775
Sold Out Positions 515
Total Mkt Value (in $ millions) 873

Institutional Holdings information is filed by major institutions on form 13-F with the Securities and Exchange Commission.

Sector Weighting

Basic Materials 4.71%
Capital Goods 1.85%
Conglomerates 0.81%
Consumer Cyclical 2%
Consumer/Non-Cyclical 2.28%
Energy 10.11%
Financial 8.45%
Healthcare 23.09%
Services 14.37%
Technology 12.78%
Transportation 2.5%
Utilities 2.98%

1,819 Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held ▲
500 COM LTD SPON ADR REP A -118 Sold Out 0
AAR CORP COM -21 Sold Out 0
AARONS INC COM PAR $0.50 -61 Sold Out 0
ABBOTT LABS COM -5 Sold Out 0
ABENGOA YIELD PLC ORD SHS -628 Sold Out 0
ABIOMED INC COM -789 Sold Out 0
ABRAXAS PETE CORP COM -200 Sold Out 0
ACCELERATE DIAGNOSTICS INC COM -383 Sold Out 0
ACCO BRANDS CORP COM -1 Sold Out 0
ACETO CORP COM -1 Sold Out 0
ACTIVISION BLIZZARD INC COM -1,642 Sold Out 0
ADVANCED EMISSIONS SOLUTS INC COM -23 Sold Out 0
AECOM COM -60 Sold Out 0
AEGEAN MARINE PETROLEUM NETWRK SHS -6 Sold Out 0
AERCAP HOLDINGS NV SHS -261 Sold Out 0
AFFYMETRIX INC COM -5 Sold Out 0
AG MTG INVT TR INC COM -72 Sold Out 0
AIR PRODS & CHEMS INC COM -88 Sold Out 0
ALEXION PHARMACEUTICALS INC COM -570 Sold Out 0
ALEXZA PHARMACEUTICALS INC COM NEW -24 Sold Out 0


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