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%

835 INCREASED Positions as of 12/31/2014

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
ACTAVIS PLC SHS 41,569 6,602 18.88 139,939
BLACKBERRY LTD COM 35,655 1,627 4.78 3,605,161
PENNEY J C INC COM 17,455 9,876 130.31 2,003,981
ALCATEL-LUCENT SPONSORED ADR 9,762 4,599 89.09 2,515,853
ANGLOGOLD ASHANTI LTD SPONSORED ADR 8,057 5,075 170.17 706,122
RAPTOR PHARMACEUTICAL CORP COM 7,927 362 4.78 722,563
GILEAD SCIENCES INC COM 7,545 7,505 18,506 74,424
ARENA PHARMACEUTICALS INC COM 7,524 362 5.05 1,621,558
ARIAD PHARMACEUTICALS INC COM 7,519 185 2.52 836,416
SUNEDISON INC COM 7,490 3,187 74.08 282,752
WHITING PETE CORP NEW COM 7,173 6,639 1,242.93 205,227
DISH NETWORK CORP CL A 6,768 3,236 91.63 97,723
PHARMACYCLICS INC COM 6,092 1,721 39.38 23,663
FIREEYE INC COM 5,928 2,163 57.45 145,145
INFOBLOX INC COM 5,742 1,919 50.21 246,776
FRANCO NEVADA CORP COM 5,165 520 11.20 105,051
3-D SYS CORP DEL COM NEW 5,117 3,368 192.50 162,509
CANADIAN PAC RY LTD COM 5,090 4,116 422.89 26,793
CELLDEX THERAPEUTICS INC NEW COM 4,988 1,160 30.32 186,382
ADVANCED MICRO DEVICES INC COM 4,929 185 3.91 1,914,168


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