GROUP ONE TRADING, L.P. Information

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

Report Date: 12/31/2014

Position Statistics

Total Positions 1,901
New Positions 414
Increased Positions 835
Decreased Positions 1,006
Positions with Activity 1,841
Sold Out Positions 470
Total Mkt Value (in $ millions) 1,062

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

Sector Weighting

Basic Materials 4.43%
Capital Goods 1.99%
Conglomerates 1.01%
Consumer Cyclical 2.2%
Consumer/Non-Cyclical 1.73%
Energy 8.53%
Financial 8.19%
Healthcare 19.69%
Services 16.02%
Technology 14.45%
Transportation 2.45%
Utilities 1.99%

1,901 Positions as of 12/31/2014

Company Class Value of Shares ($1,000s) ▲ Change in Value ($1,000s) Change (%) Shares Held
3M CO COM -32 Sold Out 0
8X8 INC NEW COM -33 Sold Out 0
ACCELERON PHARMA INC COM -7 Sold Out 0
ACCURIDE CORP NEW COM NEW -25 Sold Out 0
ACELRX PHARMACEUTICALS INC COM -106 Sold Out 0
ACORN ENERGY INC COM -1 Sold Out 0
ACXIOM CORP COM -1 Sold Out 0
ADAM NAT RES FD INC COM -32 Sold Out 0
ADECOAGRO S A COM -19 Sold Out 0
ADVANCED ENERGY INDS COM -10 Sold Out 0
AGCO CORP COM -648 Sold Out 0
AIR TRANSPORT SERVICES GRP INC COM -2 Sold Out 0
ALCOA INC COM -1 Sold Out 0
ALIMERA SCIENCES INC COM -68 Sold Out 0
ALLIANCE ONE INTL INC COM -2 Sold Out 0
ALLIED WRLD ASSUR COM HLDG AG SHS -4 Sold Out 0
ALLSTATE CORP COM -7 Sold Out 0
ALNYLAM PHARMACEUTICALS INC COM -1,636 Sold Out 0
AMAG PHARMACEUTICALS INC COM -91 Sold Out 0
AMAZON COM INC COM -668 Sold Out 0