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 1,811
New Positions 392
Increased Positions 762
Decreased Positions 1,006
Positions with Activity 1,768
Sold Out Positions 513
Total Mkt Value (in $ millions) 817

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

Sector Weighting

Basic Materials 3.69%
Capital Goods 1.71%
Conglomerates 0.77%
Consumer Cyclical 2%
Consumer/Non-Cyclical 2.4%
Energy 8.87%
Financial 8.83%
Healthcare 25.74%
Services 14.67%
Technology 11.75%
Transportation 2.53%
Utilities 2.96%

1,811 Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
YRC WORLDWIDE INC COM PAR $.01 2,857 -1,175 (29.14) 186,996
HALOZYME THERAPEUTICS INC COM 2,781 2,587 1,334.42 120,247
ALIBABA GROUP HLDG LTD SPONSORED ADS 2,772 -866 (23.8) 34,673
HALLIBURTON CO COM 2,697 146 5.74 63,775
WILLIAMS PARTNERS L P NEW COM UNIT LTD PAR 2,689 2,377 760.90 56,888
GOPRO INC CL A 2,662 2,662 New 43,159
VALEANT PHARMACEUTICALS INTL I COM 2,655 -2,275 (46.14) 10,443
CHARTER COMMUNICATIONS INC DEL CL A NEW 2,592 2,592 New 13,792
CEMEX SAB DE CV SPON ADR NEW 2,544 1,198 89.03 305,778
QORVO INC COM 2,531 2,531 New 41,837
VALE S A ADR 2,467 -378 (13.27) 475,404
T MOBILE US INC COM 2,445 933 61.70 62,914
RESTAURANT BRANDS INTL INC COM 2,443 -410 (14.38) 56,890
EXELIXIS INC COM 2,441 2,441 New 440,583
SHIRE PLC SPONSORED ADR 2,384 -482 (16.82) 9,082
NATIONSTAR MTG HLDGS INC COM 2,382 1,316 123.41 125,751
HORIZON PHARMA PLC SHS 2,381 2,381 New 65,570
AMERICAN RLTY CAP PPTYS INC COM 2,380 1,719 259.75 276,782
E-COMMERCE CHINA DANGDANG INC SPN ADS COM A 2,334 -84 (3.49) 344,303
PERRIGO CO PLC SHS 2,312 2,312 New 12,077