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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
401 POLYCOM INC 400 5 0.00% Call
402 POLYCOM INC 400 5 0.00% Put
403 MANITEX INTL INC 400 5 0.00% Put
404 DUKE ENERGY CORP NEW 64 5 0.00%
405 TUMI HLDGS INC 200 5 0.00% Put
406 FIFTH STREET FINANCE CORP 582 5 0.00%
407 PTC THERAPEUTICS INC 100 5 0.00% Call
408 PRECISION DRILLING CORP 800 5 0.00% Call
409 TEEKAY OFFSHORE PARTNERS L P 200 5 0.00% Call
410 ANTHERA PHARMACEUTICALS INC 2,900 5 0.00% Call
411 ALEXZA PHARMACEUTICALS INC 3,500 5 0.00% Call
412 CNO FINL GROUP INC 300 5 0.00% Call
413 Abbott Labs Common 100 5 0.00%
414 NANOSPHERE INC 13,673 5 0.00%
415 ARCOS DORADOS HOLDINGS INC 1,000 5 0.00% Call
416 ICON PLC 100 5 0.00% Put
417 FAIRCHILD SEMICONDUCTOR INTL 300 5 0.00% Call
418 BRUNSWICK CORP 100 5 0.00% Call
419 STEREOTAXIS INC 3,500 5 0.00% Call
420 STEREOTAXIS INC 3,300 5 0.00% Put
421 CNO FINL GROUP INC 300 5 0.00% Put
422 ZENDESK INC 215 5 0.00%
423 STAAR SURGICAL CO 500 5 0.00% Call
424 ZION OIL & GAS INC 3,300 5 0.00% Call
425 STOCK BLDG SUPPLY HLDGS INC 300 5 0.00% Put
426 AU OPTRONICS CORP 1,000 5 0.00% Put
427 KELLY SVCS INC 300 5 0.00% Call
428 SCHWAB STRATEGIC TR 100 5 0.00% Call
429 ORBITAL SCIENCES CORP 200 5 0.00% Call
430 OCLARO INC 3,100 6 0.00% Put
431 IXYS CORP 500 6 0.00% Call
432 KEY ENERGY SVCS INC 3,600 6 0.00% Put
433 RUDOLPH TECHNOLOGIES INC 600 6 0.00%
434 WEB COM GROUP INC 300 6 0.00% Put
435 AMERESCO INC 800 6 0.00% Call
436 AUTONATION INC 100 6 0.00% Call
437 HYPERDYNAMICS CORP COMMON STOCK 8,000 6 0.00% Put
438 DIGITALGLOBE INC 200 6 0.00% Put
439 PETROBRAS ARGENTINA S A 1,210 6 0.00%
440 RUDOLPH TECHNOLOGIES INC 600 6 0.00% Put
441 EMERSON ELEC CO 100 6 0.00%
442 VERINT SYS INC 100 6 0.00% Call
443 CALAMOS ASSET MANAGEMENT CL A ORD 464 6 0.00%
444 REX ENERGY CORPORATION 1,100 6 0.00% Call
445 Vical Inc 5,281 6 0.00%
446 ALON USA PARTNERS LP 500 6 0.00% Call
447 CERNER CORP 100 6 0.00% Call
448 CVENT INC 200 6 0.00% Call
449 MAXLINEAR INC 800 6 0.00%
450 SPECTRA ENERGY PARTNERS LP 100 6 0.00% Put
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