GROUP ONE TRADING, L.P. Information

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

Report Date: 12/31/2014

Position Statistics

Total Positions 1,908
New Positions 416
Increased Positions 839
Decreased Positions 1,008
Positions with Activity 1,847
Sold Out Positions 472
Total Mkt Value (in $ millions) 1,038

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

Sector Weighting

Basic Materials 4.58%
Capital Goods 2.07%
Conglomerates 0.98%
Consumer Cyclical 2.17%
Consumer/Non-Cyclical 1.71%
Energy 8.94%
Financial 8.27%
Healthcare 19.6%
Services 16.29%
Technology 14.56%
Transportation 2.51%
Utilities 1.53%

1,008 DECREASED Positions as of 12/31/2014

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
AMERICAN AIRLS GROUP INC COM 91,782 -3,228 (3.4) 1,859,820
SIRIUS XM HLDGS INC COM 21,440 -81 (0.38) 5,497,421
TWITTER INC COM 19,789 -3,466 (14.91) 400,516
RITE AID CORP COM 14,133 -1,502 (9.61) 1,729,902
ASTRAZENECA PLC SPONSORED ADR 12,791 -11,256 (46.81) 185,343
ACADIA PHARMACEUTICALS COM 10,072 -5,151 (33.84) 266,604
JAZZ PHARMACEUTICALS PLC SHS USD 9,906 -2,348 (19.16) 56,543
YPF SOCIEDAD ANONIMA SPON ADR CL D 9,289 -3,188 (25.55) 368,019
OPKO HEALTH INC COM 8,997 -803 (8.19) 606,279
INTEROIL CORP COM 7,758 -331 (4.1) 169,058
TESLA MTRS INC COM 7,577 -1,119 (12.87) 36,568
MBIA INC COM 7,082 -2,888 (28.96) 783,402
ABBVIE INC COM 6,514 -598 (8.41) 107,634
NORTHSTAR ASSET MGMT GROUP INC COM 6,167 -2,726 (30.65) 255,357
FORTRESS INVESTMENT GROUP LLC CL A 6,117 -536 (8.06) 754,251
GROUPON INC COM CL A 5,993 -1,461 (19.6) 722,054
BARCLAYS PLC ADR 5,934 -1,103 (15.67) 368,350
ISIS PHARMACEUTICALS INC COM 5,327 -600 (10.12) 79,125
BOARDWALK PIPELINE PARTNERS LP UT LTD PARTNER 5,279 -1,658 (23.9) 324,492
APOLLO GLOBAL MGMT LLC CL A SHS 4,960 -4,196 (45.83) 214,738


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