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 1,901
New Positions 414
Increased Positions 835
Decreased Positions 1,006
Positions with Activity 1,841
Sold Out Positions 470
Total Mkt Value (in $ millions) 1,043

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

Sector Weighting

Basic Materials 4.38%
Capital Goods 2.06%
Conglomerates 1.01%
Consumer Cyclical 2.17%
Consumer/Non-Cyclical 1.77%
Energy 8.82%
Financial 8.28%
Healthcare 19.88%
Services 16.08%
Technology 14.46%
Transportation 2.42%
Utilities 1.99%

1,006 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 89,625 -3,152 (3.4) 1,859,820
SIRIUS XM HLDGS INC COM 21,330 -80 (0.38) 5,497,421
TWITTER INC COM 20,290 -3,554 (14.91) 400,516
RITE AID CORP COM 13,839 -1,471 (9.61) 1,729,902
ASTRAZENECA PLC SPONSORED ADR 13,219 -11,633 (46.81) 185,343
YPF SOCIEDAD ANONIMA SPON ADR CL D 11,033 -3,787 (25.55) 368,019
JAZZ PHARMACEUTICALS PLC SHS USD 10,584 -2,509 (19.16) 56,543
ACADIA PHARMACEUTICALS COM 10,139 -5,185 (33.84) 266,604
OPKO HEALTH INC COM 8,658 -772 (8.19) 606,279
INTEROIL CORP COM 8,485 -362 (4.1) 169,058
TESLA MTRS INC COM 7,562 -1,117 (12.87) 36,568
MBIA INC COM 7,497 -3,057 (28.96) 783,402
ABBVIE INC COM 6,705 -616 (8.41) 107,634
FORTRESS INVESTMENT GROUP LLC CL A 6,343 -556 (8.06) 754,251
BARCLAYS PLC ADR 5,658 -1,052 (15.67) 368,350
BOARDWALK PIPELINE PARTNERS LP UT LTD PARTNER 5,451 -1,712 (23.9) 324,492
SPRINT CORP COM SER 1 5,280 -1,407 (21.04) 1,033,276
GROUPON INC COM CL A 5,199 -1,267 (19.6) 722,054
ISIS PHARMACEUTICALS INC COM 5,169 -582 (10.12) 79,125
NORTHSTAR ASSET MGMT GROUP INC COM 5,161 -2,281 (30.65) 255,357


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