GROUP ONE TRADING, L.P. Information

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

Report Date: 03/31/2015

Position Statistics

Total Positions 1,810
New Positions 392
Increased Positions 762
Decreased Positions 1,005
Positions with Activity 1,767
Sold Out Positions 513
Total Mkt Value (in $ millions) 814

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

Sector Weighting

Basic Materials 3.71%
Capital Goods 1.72%
Conglomerates 0.77%
Consumer Cyclical 2%
Consumer/Non-Cyclical 2.42%
Energy 8.71%
Financial 8.59%
Healthcare 26.04%
Services 14.45%
Technology 11.69%
Transportation 2.62%
Utilities 2.95%

1,810 Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
INVACARE CORP COM 3 3 New 200
APOLLO COML REAL EST FIN INC COM 3 New 200
MERCURY SYS INC COM 3 -3 (48.04) 238
NRG YIELD INC COM CL A 3 3 New 69
TASEKO MINES LTD COM 3 -2 (34.05) 6,586
2U INC COM 3 3 New 100
LPATH INC COM NEW 3 3 5,790 11,780
IMMUNOCELLULAR THERAPEUTICS COM 3 -1 (26.98) 6,595
W & T OFFSHORE INC COM 3 3 New 835
MIZUHO FINL GROUP INC SPONSORED ADR 3 3 New 700
MCEWEN MNG INC COM 3 -11 (77.32) 4,272
CLECO CORP NEW COM 3 -82 (96.34) 57
MARKETO INC COM 3 -33 (91.65) 100
YANZHOU COAL MNG CO LTD SPON ADR H SHS 3 3 New 534
DELCATH SYS INC COM NEW 3 3 16,633.33 5,522
DARA BIOSCIENCES INC COM PAR $ 3 3 New 3,610
RADIOSHACK CORP COM 3 3 New 31,166
CHICOS FAS INC COM 3 -109 (97.46) 186
CROSSAMERICA PARTNERS LP UT LTD PTN INT 3 -301 (99.08) 100
CONSOLIDATED WATER CO INC ORD 3 -1 (30.49) 228