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 1,820
New Positions 393
Increased Positions 767
Decreased Positions 1,009
Positions with Activity 1,776
Sold Out Positions 516
Total Mkt Value (in $ millions) 882

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 1.88%
Conglomerates 0.81%
Consumer Cyclical 2.01%
Consumer/Non-Cyclical 2.26%
Energy 10.45%
Financial 8.53%
Healthcare 22.43%
Services 14.31%
Technology 13%
Transportation 2.54%
Utilities 3.09%

1,820 Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
CHARTER COMMUNICATIONS INC DEL CL A NEW 2,418 2,418 New 13,792
NORTHSTAR ASSET MGMT GROUP INC COM 2,409 -3,051 (55.88) 112,668
PERRIGO CO PLC SHS 2,397 2,397 New 12,077
SHIRE PLC SPONSORED ADR 2,362 -478 (16.82) 9,082
GOPRO INC CL A 2,350 2,350 New 43,159
ESPERION THERAPEUTICS INC NEW COM 2,319 1,553 202.59 21,484
KOSMOS ENERGY LTD SHS 2,315 2,261 4,219.99 254,102
T MOBILE US INC COM 2,308 881 61.70 62,914
ENERGY TRANSFER PRTNRS L P UNIT LTD PARTN 2,277 2,277 New 39,238
RESTAURANT BRANDS INTL INC COM 2,266 -381 (14.38) 56,890
BOARDWALK PIPELINE PARTNERS LP UT LTD PARTNER 2,225 -3,243 (59.31) 132,042
NATIONAL OILWELL VARCO INC COM 2,206 2,177 7,612.06 43,496
HILTON WORLDWIDE HLDGS INC COM 2,195 532 32.00 74,797
ITAU UNIBANCO HLDG SA SPON ADR REP PFD 2,191 1,843 528.82 192,562
AKORN INC COM 2,170 2,131 5,542.99 49,489
LIBERTY GLOBAL PLC SHS CL A 2,167 -1,112 (33.9) 37,733
MARKWEST ENERGY PARTNERS L P UNIT LTD PARTN 2,165 -1,127 (34.24) 32,984
FRANCO NEVADA CORP COM 2,162 -3,366 (60.89) 41,082
HORIZON PHARMA PLC SHS 2,102 2,102 New 65,570
HALOZYME THERAPEUTICS INC COM 2,098 1,952 1,334.42 120,247