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 1,815
New Positions 392
Increased Positions 765
Decreased Positions 1,007
Positions with Activity 1,772
Sold Out Positions 514
Total Mkt Value (in $ millions) 843

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

Sector Weighting

Basic Materials 4.45%
Capital Goods 1.78%
Conglomerates 0.78%
Consumer Cyclical 1.94%
Consumer/Non-Cyclical 2.32%
Energy 9.95%
Financial 8.57%
Healthcare 24.22%
Services 14.57%
Technology 12.41%
Transportation 2.43%
Utilities 2.87%

1,772 Activity Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
ALLERGAN PLC SHS 38,079 -4,954 (11.51) 123,829
AMERICAN AIRLS GROUP INC COM 30,998 -41,590 (57.3) 794,218
ABBVIE INC COM 26,817 13,039 94.63 393,155
BLACKBERRY LTD COM 19,044 -9,654 (33.64) 2,392,403
RAPTOR PHARMACEUTICAL CORP COM 16,640 5,231 45.85 1,053,829
INTEROIL CORP COM 14,506 4,621 46.75 248,088
MOBILEYE N V AMSTELVEEN ORD SHS 14,164 14,164 New 259,838
GILEAD SCIENCES INC COM 9,968 1,406 16.42 86,646
TARGA RES CORP COM 9,521 5,779 154.45 108,751
PENNEY J C INC COM 9,384 -7,750 (45.23) 1,097,493
RITE AID CORP COM 9,201 -5,313 (36.61) 1,096,638
BANCO SANTANDER SA ADR 9,193 5,990 187.04 1,303,996
FIDELITY NATIONAL FINANCIAL IN FNF GROUP COM 8,902 8,902 New 236,559
ACADIA PHARMACEUTICALS COM 8,630 -2,485 (22.36) 206,999
GOLAR LNG LTD BERMUDA SHS 8,358 2,431 41.02 183,444
YPF SOCIEDAD ANONIMA SPON ADR CL D 8,192 -1,899 (18.82) 298,745
CELLDEX THERAPEUTICS INC NEW COM 8,099 3,561 78.46 332,609
INFINERA CORPORATION COM 7,458 2,533 51.45 351,607
ALCATEL-LUCENT SPONSORED ADR 7,399 -1,608 (17.85) 2,066,747
ADVANCED MICRO DEVICES INC COM 7,399 2,556 52.78 2,924,459