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 1,902
New Positions 415
Increased Positions 836
Decreased Positions 1,006
Positions with Activity 1,842
Sold Out Positions 471
Total Mkt Value (in $ millions) 1,020

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

Sector Weighting

Basic Materials 4.2%
Capital Goods 2.09%
Conglomerates 0.98%
Consumer Cyclical 2.1%
Consumer/Non-Cyclical 1.77%
Energy 8.04%
Financial 8.19%
Healthcare 20.13%
Services 16.17%
Technology 14.25%
Transportation 2.51%
Utilities 1.92%

1,902 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 97,938 -3,445 (3.4) 1,859,820
ACTAVIS PLC SHS 42,480 6,746 18.88 139,939
BLACKBERRY LTD COM 34,105 1,556 4.78 3,605,161
SIRIUS XM HLDGS INC COM 21,165 -80 (0.38) 5,497,421
TWITTER INC COM 20,030 -3,508 (14.91) 400,516
PENNEY J C INC COM 15,290 8,651 130.31 2,003,981
RITE AID CORP COM 14,825 -1,576 (9.61) 1,729,902
ASTRAZENECA PLC SPONSORED ADR 12,987 -11,429 (46.81) 185,343
YPF SOCIEDAD ANONIMA SPON ADR CL D 10,264 -3,523 (25.55) 368,019
JAZZ PHARMACEUTICALS PLC SHS USD 9,919 -2,352 (19.16) 56,543
ALCATEL-LUCENT SPONSORED ADR 9,309 4,386 89.09 2,515,853
OPKO HEALTH INC COM 8,785 -784 (8.19) 606,279
RAPTOR PHARMACEUTICAL CORP COM 8,649 395 4.78 722,563
ACADIA PHARMACEUTICALS COM 8,521 -4,357 (33.84) 266,604
INTEROIL CORP COM 7,548 -322 (4.1) 169,058
GILEAD SCIENCES INC COM 7,517 7,476 18,506 74,424
ARENA PHARMACEUTICALS INC COM 7,021 338 5.05 1,621,558
ARIAD PHARMACEUTICALS INC COM 7,018 173 2.52 836,416
ANGLOGOLD ASHANTI LTD SPONSORED ADR 6,962 4,385 170.17 706,122
DISH NETWORK CORP CL A 6,902 3,300 91.63 97,723


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