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Institutional Investment Manager
GROUP ONE TRADING LLC
GROUP ONE TRADING LLC (CIK: 0000932540) incorporated in Delaware, located at 425 S Financial Place, Chicago, IL. Institutional holdings reported to the SEC.

Institutional Holdings (2014Q4)
Original 13F HR (0000932540-15-000002) filed in 2015.02.11
#
Name
Shares
Value ($)
%
Options
Notes
451 EZCHIP SEMICONDUCTOR LIMITED 300 6 0.00% Call
452 SYNERON MEDICAL LTD 650 6 0.00%
453 ALON USA PARTNERS LP 500 6 0.00% Call
454 TIMKENSTEEL CORPORATION COM 173 6 0.00%
455 CALAMOS ASSET MANAGEMENT CL A ORD 464 6 0.00%
456 VERINT SYS INC 100 6 0.00% Call
457 REEDS INC 1,000 6 0.00% Call
458 CELLCOM ISRAEL LTD 708 6 0.00%
459 VERINT SYS INC 100 6 0.00%
460 ALLISON TRANSMISSION HLDGS INC COM 185 6 0.00%
461 MRC Global Inc 403 6 0.00%
462 PARKER DRILLING CO 2,000 6 0.00% Call
463 Vical Inc 5,281 6 0.00%
464 FLOWERS FOODS INC 300 6 0.00% Put
465 EMERSON ELEC CO 100 6 0.00%
466 PAYLOCITY HOLDING CORPORATION COM 221 6 0.00%
467 SPECTRA ENERGY PARTNERS LP 100 6 0.00% Put
468 APPLIED OPTOELECTRONICS INC 500 6 0.00% Call
469 CHINA LIFE INS CO LTD 100 6 0.00% Put
470 RUDOLPH TECHNOLOGIES INC 600 6 0.00% Put
471 ONCONOVA THERAPEUTICS INC 1,700 6 0.00% Put
472 MAIDEN HOLDINGS LTD 500 6 0.00% Put
473 ALIGN TECHNOLOGY INC 100 6 0.00% Call
474 CARDIOME PHARMA CORP 677 6 0.00%
475 ANTERO MIDSTREAM PARTNERS LP 200 6 0.00%
476 HOSPITALITY PPTYS TR 200 6 0.00% Put
477 J2 GLOBAL INC 100 6 0.00% Call
478 CARDIOME PHARMA CORP 600 6 0.00% Put
479 EPR PPTYS 100 6 0.00% Call
480 KRAFT FOODS GROUP INC 100 6 0.00% Call
481 REALNETWORKS INC 800 6 0.00%
482 KEY ENERGY SVCS INC 3,600 6 0.00% Put
483 Amyris 2,956 6 0.00%
484 CERNER CORP 100 6 0.00% Call
485 CVENT INC 200 6 0.00% Call
486 AES CORP 400 6 0.00% Call
487 TCP CAP CORP 331 6 0.00%
488 CROSS CTRY HEALTHCARE INC 500 6 0.00% Put
489 RUDOLPH TECHNOLOGIES INC 600 6 0.00%
490 SABRE CORP 318 6 0.00%
491 REALNETWORKS INC 800 6 0.00% Put
492 GUIDANCE SOFTWARE INC 767 6 0.00%
493 ONCONOVA THERAPEUTICS 1,880 6 0.00%
494 CHINA INFORMATION TECHNOLOGY 1,600 6 0.00% Put
495 SUPPORT COM INC 3,200 7 0.00% Call
496 FOREST OIL CORP 32,200 7 0.00% Put
497 CYAN INC 2,905 7 0.00%
498 GTX INC DEL 10,000 7 0.00% Call
499 ROYALE ENERGY INC 3,300 7 0.00% Put
500 SERVICENOW INC 98 7 0.00%
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