GROUP ONE TRADING, L.P. Information

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

Report Date: 03/31/2014

Position Statistics

Total Positions 1,918
New Positions 468
Increased Positions 924
Decreased Positions 968
Positions with Activity 1,892
Sold Out Positions 492
Total Mkt Value (in $ millions) 960

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

Sector Weighting

Basic Materials 4.94%
Capital Goods 1.3%
Conglomerates 0.57%
Consumer Cyclical 2.52%
Consumer/Non-Cyclical 1.67%
Energy 13.9%
Financial 6.86%
Healthcare 14%
Services 21.77%
Technology 20.22%
Transportation 3.54%
Utilities 4.74%

1,918 Positions as of 03/31/2014

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
ENDO INTL PLC SHS 3,407 508 17.53 51,104
ACHILLION PHARMACEUTICALS INC COM 3,314 -1,271 (27.72) 458,974
E HOUSE CHINA HLDGS LTD ADR 3,272 3,272 New 278,194
SUNEDISON INC COM 3,250 -10,570 (76.49) 152,711
BAZAARVOICE INC COM 3,227 -483 (13.02) 433,702
AMERICAN CAP LTD COM 3,219 18 .58 208,072
CNOOC LTD SPONSORED ADR 3,190 1,638 105.45 17,858
OCWEN FINL CORP COM NEW 3,108 -2,111 (40.45) 88,382
NEW GOLD INC CDA COM 3,092 2,205 248.44 479,417
LIONS GATE ENTMNT CORP COM NEW 3,083 106 3.55 97,238
CELLDEX THERAPEUTICS INC NEW COM 3,000 37 1.24 219,769
AMERICAN RLTY CAP PPTYS INC COM 2,998 564 23.15 226,621
SONY CORP ADR NEW 2,976 7 .24 170,342
ENCANA CORP COM 2,954 1,214 69.80 133,948
SUPERNUS PHARMACEUTICALS INC COM 2,919 1,155 65.50 329,801
ACTAVIS PLC SHS 2,892 -7,735 (72.79) 13,459
YANDEX N V SHS CLASS A 2,829 781 38.10 92,953
QLIK TECHNOLOGIES INC COM 2,822 -1,210 (30.02) 105,325
BLACKSTONE GROUP L P COM UNIT LTD 2,780 1,222 78.37 81,317
IDENIX PHARMACEUTICALS INC COM 2,765 2,765 New 113,475