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 1,820
New Positions 393
Increased Positions 767
Decreased Positions 1,009
Positions with Activity 1,776
Sold Out Positions 516
Total Mkt Value (in $ millions) 880

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

Sector Weighting

Basic Materials 4.88%
Capital Goods 1.91%
Conglomerates 0.81%
Consumer Cyclical 2.01%
Consumer/Non-Cyclical 2.27%
Energy 10.54%
Financial 8.61%
Healthcare 22.39%
Services 14.28%
Technology 12.85%
Transportation 2.55%
Utilities 3.1%

1,776 Activity Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
ACTAVIS PLC SHS 37,300 -4,853 (11.51) 123,829
AMERICAN AIRLS GROUP INC COM 33,730 -45,256 (57.3) 794,218
ABBVIE INC COM 25,811 18,744 265.27 393,155
BLACKBERRY LTD COM 24,570 -12,455 (33.64) 2,392,403
RAPTOR PHARMACEUTICAL CORP COM 12,551 3,945 45.85 1,053,829
MOBILEYE N V AMSTELVEEN ORD SHS 12,262 12,262 New 259,838
INTEROIL CORP COM 11,819 3,765 46.75 248,088
TARGA RES CORP COM 10,720 6,507 154.45 108,751
BANCO SANTANDER SA ADR 9,780 6,373 187.04 1,303,996
PENNEY J C INC COM 9,702 -8,013 (45.23) 1,097,493
GILEAD SCIENCES INC COM 9,637 1,359 16.42 86,646
SEADRILL LIMITED SHS 9,476 7,279 331.32 679,739
RITE AID CORP COM 9,299 -5,370 (36.61) 1,096,638
GOLAR LNG LTD BERMUDA SHS 9,115 2,652 41.02 183,444
CELLDEX THERAPEUTICS INC NEW COM 9,027 3,969 78.46 332,609
FIDELITY NATIONAL FINANCIAL IN FNF GROUP COM 9,020 9,020 New 236,559
YPF SOCIEDAD ANONIMA SPON ADR CL D 8,559 -1,985 (18.82) 298,745
ACADIA PHARMACEUTICALS COM 8,326 -2,397 (22.36) 206,999
ALCATEL-LUCENT SPONSORED ADR 8,060 -1,752 (17.85) 2,066,747
ISIS PHARMACEUTICALS INC COM 7,644 2,330 43.83 113,807