GROUP ONE TRADING, L.P.
440 S. LASALLE STREET, CHICAGO, Illinois, 60605, (312) 431-2841
Report Date: 03/31/2013
Position Statistics:
| Total Positions | 1,742 |
| New Positions | 452 |
| Increased Positions | 914 |
| Decreased Positions | 808 |
| Positions with Activity | 1,722 |
| Sold Out Positions | 434 |
| Total Mkt Value (in $ millions) |
519 |
Sector Weighting
| Basic Materials | 6.26% |
| Capital Goods | 1.93% |
| Conglomerates | 0.68% |
| Consumer Cyclical | 2.46% |
| Consumer/Non-Cyclical | 5.01% |
| Energy | 13.01% |
| Financial | 12.7% |
| Healthcare | 10.69% |
| Services | 28.67% |
| Technology | 15.92% |
| Transportation | 1.26% |
| Utilities | 0.96% |
Institutional Holdings information is filed by major institutions on form 13-F with the Securities and Exchange Commission.
1,742 Positions as of 03/31/2013
| Company | Class | Value of Shares ($1,000s) |
Change in Value ($1,000s) | Change (%) | Shares Held |
|---|---|---|---|---|---|
| FOCUS MEDIA HLDG LTD | SPONSORED ADR | 50,938 | 28,884 | 130.97 | 1,857,702 |
| DELL INC | COM | 12,209 | 12,146 | 19,379.03 | 913,177 |
| CONSTELLATION BRANDS INC | CL A | 10,875 | 4,703 | 76.18 | 211,169 |
| NEWS CORP | CL A | 9,259 | 9,259 | New | 278,717 |
| NEWFIELD EXPL CO | COM | 8,874 | 8,844 | 29,986.30 | 360,133 |
| ARBITRON INC | COM | 8,518 | 7,947 | 1,390.68 | 182,087 |
| OCWEN FINL CORP | COM NEW | 8,211 | 8,211 | New | 197,377 |
| VODAFONE GROUP PLC NEW | SPONS ADR NEW | 7,928 | 7,355 | 1,283.12 | 270,316 |
| NATIONSTAR MTG HLDGS INC | COM | 7,245 | 4,166 | 135.33 | 168,603 |
| NOKIA CORP | SPONSORED ADR | 7,068 | 6,660 | 1,630.68 | 1,941,861 |
| PLAINS EXPL& PRODTN CO | COM | 5,575 | 5,085 | 1,038.14 | 113,859 |
| JIVE SOFTWARE INC | COM | 5,308 | 5,273 | 14,918.51 | 335,964 |
| ZHONGPIN INC | COM | 5,089 | 2,151 | 73.19 | 392,661 |
| AMERICAN CAP LTD | COM | 4,923 | 3,650 | 286.54 | 346,223 |
| GENWORTH FINL INC | COM CL A | 4,784 | 2,951 | 160.95 | 456,512 |
| MBIA INC | COM | 4,759 | 3,203 | 205.90 | 325,487 |
| COBALT INTL ENERGY INC | COM | 4,663 | 3,550 | 318.84 | 174,263 |
| RADIAN GROUP INC | COM | 4,396 | 2,064 | 88.55 | 331,265 |
| NORTHERN TIER ENERGY LP | COM UN REPR PART | 4,295 | 4,295 | New | 170,443 |
| MICHAEL KORS HLDGS LTD | SHS | 4,208 | 973 | 30.07 | 69,600 |
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