GROUP ONE TRADING, L.P. Information

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

Report Date: 06/30/2015

Position Statistics

Total Positions 1,739
New Positions 444
Increased Positions 906
Decreased Positions 779
Positions with Activity 1,685
Sold Out Positions 362
Total Mkt Value (in $ millions) 926

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

Sector Weighting

Basic Materials 4.09%
Capital Goods 1.2%
Conglomerates 0.89%
Consumer Cyclical 1.38%
Consumer/Non-Cyclical 2.59%
Energy 8.64%
Financial 9.56%
Healthcare 22.55%
Services 15.63%
Technology 14.38%
Transportation 3.18%
Utilities 1.47%

1,739 Positions as of 06/30/2015

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held ▲
2U INC COM -3 Sold Out 0
8X8 INC NEW COM -36 Sold Out 0
ABERCROMBIE & FITCH CO CL A -139 Sold Out 0
ACADIA HEALTHCARE COMPANY INC COM -369 Sold Out 0
ACCELERON PHARMA INC COM -187 Sold Out 0
ADAMIS PHARMACEUTICALS CORP COM NEW -8 Sold Out 0
ADCARE HEALTH SYSTEMS INC COM NEW -143 Sold Out 0
AES CORP COM -56 Sold Out 0
AGIOS PHARMACEUTICALS INC COM -228 Sold Out 0
AIRCASTLE LTD COM -10 Sold Out 0
ALASKA COMMUNICATIONS SYS GRP COM -13 Sold Out 0
ALBANY MOLECULAR RESH INC COM -128 Sold Out 0
ALEXANDER & BALDWIN INC NEW COM -27 Sold Out 0
ALEXION PHARMACEUTICALS INC COM -416 Sold Out 0
ALLIANCE DATA SYSTEMS CORP COM -49 Sold Out 0
ALLIANCE RES PARTNER L P UT LTD PART -116 Sold Out 0
ALLIED NEVADA GOLD CORP COM -24 Sold Out 0
ALLISON TRANSMISSION HLDGS INC COM -9 Sold Out 0
ALLY FINL INC COM -480 Sold Out 0
ALPHA NAT RES INC COM -12 Sold Out 0