GROUP ONE TRADING, L.P. Information

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

Report Date: 03/31/2014

Position Statistics

Total Positions 1,921
New Positions 468
Increased Positions 924
Decreased Positions 971
Positions with Activity 1,895
Sold Out Positions 493
Total Mkt Value (in $ millions) 982

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

Sector Weighting

Basic Materials 4.84%
Capital Goods 1.3%
Conglomerates 0.57%
Consumer Cyclical 2.43%
Consumer/Non-Cyclical 1.7%
Energy 13.73%
Financial 6.66%
Healthcare 14.15%
Services 21.16%
Technology 21.52%
Transportation 3.5%
Utilities 4.57%

1,921 Positions as of 03/31/2014

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
SUPERVALU INC COM 3,694 3,694 New 453,278
SUNEDISON INC COM 3,673 -11,946 (76.49) 152,711
ACHILLION PHARMACEUTICALS INC COM 3,507 -1,345 (27.72) 458,974
SUPERNUS PHARMACEUTICALS INC COM 3,470 1,373 65.50 329,801
ENDO INTL PLC SHS 3,360 501 17.53 51,104
NATUS MEDICAL INC DEL COM 3,353 2,534 309.30 133,466
BAZAARVOICE INC COM 3,331 -499 (13.02) 433,702
CELLDEX THERAPEUTICS INC NEW COM 3,233 40 1.24 219,769
AMERICAN CAP LTD COM 3,221 18 .58 208,072
NEW GOLD INC CDA COM 3,183 2,270 248.44 479,417
OCWEN FINL CORP COM NEW 3,146 -2,136 (40.45) 88,382
CNOOC LTD SPONSORED ADR 3,081 1,581 105.45 17,858
GT ADVANCED TECHNOLOGIES INC COM 3,062 3,062 New 190,756
YANDEX N V SHS CLASS A 2,985 823 38.10 92,953
ACTAVIS PLC SHS 2,929 -7,836 (72.79) 13,459
ENCANA CORP COM 2,927 1,203 69.80 133,948
AMERICAN RLTY CAP PPTYS INC COM 2,871 540 23.15 226,621
SONY CORP ADR NEW 2,838 7 .24 170,342
LIONS GATE ENTMNT CORP COM NEW 2,779 95 3.55 97,238
BIODELIVERY SCIENCES INTL INC COM 2,754 1,681 156.64 196,438


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