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 1,812
New Positions 391
Increased Positions 764
Decreased Positions 1,005
Positions with Activity 1,769
Sold Out Positions 512
Total Mkt Value (in $ millions) 869

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

Sector Weighting

Basic Materials 4.54%
Capital Goods 1.9%
Conglomerates 0.78%
Consumer Cyclical 2%
Consumer/Non-Cyclical 2.31%
Energy 10.09%
Financial 8.54%
Healthcare 23.87%
Services 14.49%
Technology 12.45%
Transportation 2.51%
Utilities 2.86%

1,812 Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
LIGHTINTHEBOX HLDG CO LTD SPONSORED ADR -16 Sold Out 0
LILLY ELI & CO COM -9 Sold Out 0
LOCAL CORP COM Sold Out 0
LORAL SPACE & COMMUNICATNS INC COM -153 Sold Out 0
LYONDELLBASELL INDUSTRIES N V SHS - A - -20 Sold Out 0
M D C HLDGS INC COM -127 Sold Out 0
M/I HOMES INC COM -2 Sold Out 0
MACQUARIE INFRASTRUCTURE CORP COM -299 Sold Out 0
MAG SILVER CORP COM -42 Sold Out 0
MAIN STREET CAPITAL CORP COM -109 Sold Out 0
MAKEMYTRIP LIMITED MAURITIUS SHS -1 Sold Out 0
MANITOWOC INC COM -3,752 Sold Out 0
MANNING & NAPIER INC CL A -10 Sold Out 0
MARTHA STEWART LIVING OMNIMED CL A -39 Sold Out 0
MASCO CORP COM -2,747 Sold Out 0
MASONITE INTL CORP NEW COM -109 Sold Out 0
MATRIX SVC CO COM -94 Sold Out 0
MBIA INC COM -6,518 Sold Out 0
MCCLATCHY CO CL A Sold Out 0
MCDERMOTT INTL INC COM -974 Sold Out 0