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 1,898
New Positions 413
Increased Positions 835
Decreased Positions 1,003
Positions with Activity 1,838
Sold Out Positions 468
Total Mkt Value (in $ millions) 1,019

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

Sector Weighting

Basic Materials 4.8%
Capital Goods 2.06%
Conglomerates 1.06%
Consumer Cyclical 2.34%
Consumer/Non-Cyclical 1.74%
Energy 9.02%
Financial 8.46%
Healthcare 19.17%
Services 16.02%
Technology 14.43%
Transportation 2.59%
Utilities 2.04%

1,898 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 -32 Sold Out 0
ACCELERON PHARMA INC COM -5 Sold Out 0
ACCURIDE CORP NEW COM NEW -21 Sold Out 0
ACELRX PHARMACEUTICALS INC COM -70 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 -685 Sold Out 0
AIR TRANSPORT SERVICES GRP INC COM -2 Sold Out 0
ALCOA INC COM -1 Sold Out 0
ALIMERA SCIENCES INC COM -59 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 -1,430 Sold Out 0
AMAG PHARMACEUTICALS INC COM -84 Sold Out 0
AMAZON COM INC COM -632 Sold Out 0