GROUP ONE TRADING, L.P. Information

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

Report Date: 06/30/2015

Position Statistics

Total Positions 1,739
New Positions 444
Increased Positions 906
Decreased Positions 779
Positions with Activity 1,685
Sold Out Positions 362
Total Mkt Value (in $ millions) 926

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

Sector Weighting

Basic Materials 4.09%
Capital Goods 1.2%
Conglomerates 0.89%
Consumer Cyclical 1.38%
Consumer/Non-Cyclical 2.59%
Energy 8.64%
Financial 9.56%
Healthcare 22.55%
Services 15.63%
Technology 14.38%
Transportation 3.18%
Utilities 1.47%

1,739 Positions as of 06/30/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
PANHANDLE OIL AND GAS INC CL A 8 2 36.99 500
RAMBUS INC DEL COM 8 New 618
DELCATH SYS INC COM NEW 8 6 200.83 16,612
CHINA XD PLASTICS CO LTD COM 8 -64 (88.59) 1,358
MITEK SYS INC COM NEW 8 -69 (89.34) 2,536
CHANNELADVISOR CORP COM 8 -186 (95.75) 752
CENTRAL PAC FINL CORP COM NEW 8 New 400
REDIFF COM INDIA LTD SPONSORED ADR 8 -4 (34.74) 6,298
VIRTUS INVT PARTNERS INC COM 8 -37 (82.21) 79
EAGLE PHARMACEUTICALS INC COM 8 8 New 100
SANDISK CORP COM 8 -83 (91.36) 149
ARLINGTON ASSET INVT CORP CL A NEW 8 8 New 500
UNILEVER PLC SPON ADR NEW 8 -24 (75) 200
ACTINIUM PHARMACEUTICALS INC COM 8 2 34.65 3,501
KBR INC COM 8 8 New 451
UNITED MICROELECTRONICS CORP SPON ADR NEW 8 8 New 4,500
GENMARK DIAGNOSTICS INC COM 8 8 New 788
PHOTRONICS INC COM 8 7 1,350.88 827
CRYOLIFE INC COM 7 7 New 762
HORNBECK OFFSHORE SVCS INC NEW COM 7 7 New 412