GROUP ONE TRADING LLC Q4 2018 Filing

Filed February 6, 2019

Portfolio Value

$11.5M

Holdings

4,844

Report Date

Q4 2018

Filing Type

13F-HR

All Holdings (4,844 positions)

#	Stock	Shares	Value	% Portfolio	Type
4001	—RETROPHIN INC	100	$23K	0.20%	Put
4002	AGXARGAN INC	607	$23K	0.20%
4003	—REALNETWORKS INC	9,952	$23K	0.20%
4004	—CORE MARK HOLDING CO INC	1,000	$23K	0.20%	Call
4005	PETSPETMED EXPRESS INC	1,000	$23K	0.20%	Put
4006	PKGPACKAGING CORP AMER	275	$23K	0.20%
4007	STARISTAR INC	2,500	$23K	0.20%
4008	TCMDTACTILE SYS TECHNOLOGY INC	500	$23K	0.20%	Put
4009	—IDERA PHARMACEUTICALS INC	8,367	$23K	0.20%
4010	AUDCAUDIOCODES LTD	2,289	$23K	0.20%
4011	ASMBASSEMBLY BIOSCIENCES INC	1,017	$23K	0.20%
4012	SNDSMART SAND INC	10,000	$22K	0.19%	Call
4013	—KRATON CORPORATION	500	$22K	0.19%	Put
4014	—BARCLAYS BK PLC	5,000	$22K	0.19%	Put
4015	CORAMERISOURCEBERGEN CORP	300	$22K	0.19%	Put
4016	—AVADEL PHARMACEUTICALS PLC	8,700	$22K	0.19%	Put
4017	—BARCLAYS BK PLC	100	$22K	0.19%	Call
4018	CMRECOSTAMARE INC	5,000	$22K	0.19%	Call
4019	—GLOBUS MED INC	500	$22K	0.19%	Put
4020	—SCHNITZER STL INDS	800	$22K	0.19%	Put
4021	—LILIS ENERGY INC	16,184	$22K	0.19%
4022	—PENNSYLVANIA RL ESTATE INVT	3,700	$22K	0.19%	Call
4023	—FRANCESCAS HLDGS CORP	23,093	$22K	0.19%
4024	SKYWSKYWEST INC	500	$22K	0.19%	Call
4025	—FLOTEK INDS INC DEL	20,100	$22K	0.19%	Put
4026	—NEOS THERAPEUTICS INC	13,600	$22K	0.19%	Put
4027	EQNREQUINOR ASA	400	$21K	0.18%	Put
4028	MCCUSDMEDLEY CAP CORP	7,779	$21K	0.18%
4029	MRNAMODERNA INC	1,400	$21K	0.18%	Call
4030	—LSC COMMUNICATIONS INC	3,000	$21K	0.18%	Put
4031	—VOXELJET AG	12,300	$21K	0.18%
4032	—NORTH AMERICAN CONST	2,400	$21K	0.18%	Call
4033	ALKSALKERMES PLC	700	$21K	0.18%	Call
4034	—TYME TECHNOLOGIES INC	5,805	$21K	0.18%
4035	—NANTKWEST INC	17,800	$21K	0.18%	Put
4036	—MEDLEY CAP CORP	7,800	$21K	0.18%	Put
4037	—PHILLIPS 66 PARTNERS LP	500	$21K	0.18%	Call
4038	—OLD REP INTL CORP	200	$21K	0.18%	Call
4039	—ARATANA THERAPEUTICS INC	3,465	$21K	0.18%
4040	—SIBANYE STILLWATER	7,200	$20K	0.17%	Put
4041	—C&J ENERGY SVCS INC NEW	1,500	$20K	0.17%	Call
4042	CDNACAREDX INC	800	$20K	0.17%	Call
4043	GNRCGENERAC HLDGS INC	400	$20K	0.17%	Call
4044	—RIGNET INC	1,602	$20K	0.17%
4045	FNHCUSDFEDNAT HLDG CO	1,000	$20K	0.17%
4046	—AMYRIS INC	6,100	$20K	0.17%	Call
4047	—WESTERN UN CO	1,200	$20K	0.17%	Put
4048	—ECHO GLOBAL LOGISTICS INC	1,000	$20K	0.17%	Call
4049	BNSBANK N S HALIFAX	400	$20K	0.17%	Put
4050	INGING GROEP N V	1,840	$20K	0.17%
4051	—CYMABAY THERAPEUTICS INC	2,500	$20K	0.17%	Call
4052	GILGILDAN ACTIVEWEAR INC	645	$20K	0.17%
4053	—ATLANTICA YIELD PLC	5,700	$20K	0.17%	Put
4054	SBSCOMPANHIA DE SANEAMENTO BASI	2,500	$20K	0.17%	Call
4055	RYAMRAYONIER ADVANCED MATLS INC	1,900	$20K	0.17%	Put
4056	AERAERCAP HOLDINGS NV	500	$20K	0.17%	Put
4057	—NEW GOLD INC CDA	26,300	$20K	0.17%	Call
4058	—UNIT CORP	1,400	$20K	0.17%
4059	NRPNATURAL RESOURCE PARTNERS L	500	$19K	0.16%	Call
4060	—CHEFS WHSE INC	600	$19K	0.16%	Put
4061	BTEBAYTEX ENERGY CORP	10,700	$19K	0.16%	Call
4062	—BRITISH AMERN TOB PLC	600	$19K	0.16%	Call
4063	TMETENCENT MUSIC ENTMT GROUP	1,400	$19K	0.16%	Call
4064	NAKNORTHERN DYNASTY MINERALS LT	33,800	$19K	0.16%	Put
4065	SNDXSYNDAX PHARMACEUTICALS INC	4,300	$19K	0.16%	Put
4066	—ZIX CORP	3,400	$19K	0.16%	Put
4067	—SAILPOINT TECHNLGIES HLDGS I	800	$19K	0.16%	Call
4068	IVPEFISHARES INC	400	$19K	0.16%	Put
4069	ABUSARBUTUS BIOPHARMA CORP	5,000	$19K	0.16%	Put
4070	—HOVNANIAN ENTERPRISES INC	27,300	$19K	0.16%	Call
4071	SOYSUNOPTA INC	5,000	$19K	0.16%
4072	—ALLSCRIPTS HEALTHCARE SOLUTN	2,000	$19K	0.16%	Put
4073	—ABM INDS INC	600	$19K	0.16%	Call
4074	PLUNPLUG POWER INC	15,573	$19K	0.16%
4075	ORNORION GROUP HOLDINGS INC	4,400	$19K	0.16%
4076	—NANOMETRICS INC	709	$19K	0.16%
4077	NBIXNEUROCRINE BIOSCIENCES INC	265	$19K	0.16%
4078	—SUNCOKE ENERGY PARTNERS L P	1,800	$19K	0.16%	Put
4079	SKYWSKYWEST INC	422	$19K	0.16%
4080	—ARCTURUS THERAPEUTICS LTD	4,086	$19K	0.16%
4081	—500 COM LTD	2,400	$18K	0.16%	Call
4082	—FARFETCH LTD	1,000	$18K	0.16%	Put
4083	SPHSEURSOPHIRIS BIO INC	21,280	$18K	0.16%
4084	—AMERICAN WTR WKS CO INC NEW	200	$18K	0.16%	Put
4085	—MAG SILVER CORP	2,500	$18K	0.16%	Put
4086	TTITETRA TECHNOLOGIES INC DEL	10,740	$18K	0.16%
4087	CMRECOSTAMARE INC	4,114	$18K	0.16%
4088	QUADQUAD / GRAPHICS INC	1,500	$18K	0.16%	Put
4089	—FINISAR CORP	828	$18K	0.16%
4090	—BRIDGEPOINT ED INC	2,600	$18K	0.16%	Put
4091	—PRA HEALTH SCIENCES INC	200	$18K	0.16%	Call
4092	PLDPROLOGIS INC	300	$18K	0.16%	Call
4093	—INNOVATE BIOPHARMACEUTICLS I	7,770	$18K	0.16%
4094	PLDPROLOGIS INC	300	$18K	0.16%	Put
4095	LXRXLEXICON PHARMACEUTICALS INC	2,785	$18K	0.16%
4096	ASYSAMTECH SYS INC	4,000	$18K	0.16%	Put
4097	—EQUITY COMWLTH	600	$18K	0.16%	Call
4098	—FUELCELL ENERGY INC	32,500	$18K	0.16%	Put
4099	—ENABLE MIDSTREAM PARTNERS LP	1,300	$18K	0.16%	Call
4100	BDNBRANDYWINE RLTY TR	1,400	$18K	0.16%	Call

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