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 1,813
New Positions 391
Increased Positions 764
Decreased Positions 1,006
Positions with Activity 1,770
Sold Out Positions 514
Total Mkt Value (in $ millions) 844

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

Sector Weighting

Basic Materials 4.42%
Capital Goods 1.78%
Conglomerates 0.78%
Consumer Cyclical 1.96%
Consumer/Non-Cyclical 2.32%
Energy 9.86%
Financial 8.54%
Healthcare 24.29%
Services 14.67%
Technology 12.4%
Transportation 2.45%
Utilities 2.83%

1,813 Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
NUSTAR GP HOLDINGS LLC UNIT RESTG LLC -325 Sold Out 0
NUVASIVE INC COM -43 Sold Out 0
NUVERRA ENVIRONMENTAL SOLUTION COM NEW -279 Sold Out 0
NVIDIA CORP COM -2 Sold Out 0
ODYSSEY MARINE EXPLORATION INC COM -1 Sold Out 0
OGE ENERGY CORP COM -25 Sold Out 0
OIL STS INTL INC COM -91 Sold Out 0
OLD REP INTL CORP COM -167 Sold Out 0
OMEGA PROTEIN CORP COM -26 Sold Out 0
ONCOGENEX PHARMACEUTICALS INC COM -38 Sold Out 0
ONE GAS INC COM -46 Sold Out 0
ORBITAL ATK INC COM -128 Sold Out 0
ORBITZ WORLDWIDE INC COM -794 Sold Out 0
ORIGIN AGRITECH LIMITED SHS -45 Sold Out 0
ORTHOFIX INTL N V COM -9 Sold Out 0
PARAMOUNT GOLD NEV CORP COM -9 Sold Out 0
PAREXEL INTL CORP COM -206 Sold Out 0
PATTERN ENERGY GROUP INC CL A -32 Sold Out 0
PAYLOCITY HLDG CORP COM -8 Sold Out 0
PENN NATL GAMING INC COM -73 Sold Out 0