GROUP ONE TRADING LLC Q1 2021 Filing

Filed May 12, 2021

Portfolio Value

$67.5M

Holdings

7,548

Report Date

Q1 2021

Filing Type

13F-HR

All Holdings (7,548 positions)

#	Stock	Shares	Value	% Portfolio	Type
4201	EQIXEQUINIX INC	600	$408K	0.60%	Call
4202	AXUALEXCO RESOURCE CORP	162,612	$408K	0.60%
4203	TWTRADEWEB MKTS INC	5,500	$407K	0.60%	Call
4204	ACRSACLARIS THERAPEUTICS INC	16,149	$407K	0.60%
4205	TNDMTANDEM DIABETES CARE INC	4,600	$406K	0.60%	Put
4206	VCELVERICEL CORP	7,300	$406K	0.60%	Call
4207	STRLSTERLING CONSTR INC	17,449	$405K	0.60%
4208	—CHICOS FAS INC	122,100	$404K	0.60%	Put
4209	OMFONEMAIN HLDGS INC	7,500	$403K	0.60%	Put
4210	ARESARES MANAGEMENT CORPORATION	7,200	$403K	0.60%	Call
4211	—FALCON CAPITAL ACQUISITN COR	40,399	$403K	0.60%
4212	CANETEUCRIUM COMMODITY TR	23,000	$403K	0.60%	Put
4213	VNTVONTIER CORPORATION	13,300	$403K	0.60%	Put
4214	—UNIVERSAL HLTH SVCS INC	3,000	$400K	0.59%	Put
4215	BLKBBLACKBAUD INC	5,627	$400K	0.59%
4216	—AEVA TECHNOLOGIES INC	34,400	$399K	0.59%	Put
4217	—TREVENA INC	222,700	$399K	0.59%	Put
4218	ALVAUTOLIV INC	4,300	$399K	0.59%	Put
4219	—LAKELAND INDS INC	14,300	$398K	0.59%	Put
4220	—HERSHA HOSPITALITY TR	37,600	$397K	0.59%	Put
4221	EPAMEPAM SYS INC	100	$397K	0.59%	Call
4222	EBSEMERGENT BIOSOLUTIONS INC	4,268	$397K	0.59%
4223	PFGPRINCIPAL FINANCIAL GROUP IN	6,600	$396K	0.59%	Put
4224	NTRANATERA INC	3,900	$396K	0.59%	Call
4225	CRBPCORBUS PHARMACEUTICALS HLDGS	201,100	$396K	0.59%	Call
4226	—ZYMEWORKS INC	12,500	$395K	0.59%	Call
4227	CQPCHENIERE ENERGY PARTNERS LP	9,500	$395K	0.59%	Call
4228	MLKNMILLER HERMAN INC	9,600	$395K	0.59%	Put
4229	PPCPILGRIMS PRIDE CORP	16,574	$394K	0.58%
4230	—FLEXION THERAPEUTICS INC	44,000	$394K	0.58%	Call
4231	PG4PRINCIPAL FINANCIAL GROUP IN	6,562	$393K	0.58%
4232	ABGASBURY AUTOMOTIVE GROUP INC	200	$393K	0.58%	Call
4233	ABGASBURY AUTOMOTIVE GROUP INC	200	$393K	0.58%	Put
4234	BANDBANDWIDTH INC	3,100	$393K	0.58%	Put
4235	—HOMOLOGY MEDICINES INC	41,700	$392K	0.58%	Call
4236	BSMBLACK STONE MINERALS L P	44,800	$391K	0.58%	Put
4237	—PETIQ INC	11,100	$391K	0.58%	Call
4238	—REXNORD CORP	8,300	$391K	0.58%	Put
4239	PUMPPROPETRO HLDG CORP	36,591	$390K	0.58%
4240	—PATTERSON COS INC	12,200	$390K	0.58%	Call
4241	—MARINUS PHARMACEUTICALS INC	25,200	$390K	0.58%	Call
4242	ABEVAMBEV SA	142,447	$390K	0.58%
4243	AOSSMITH A O CORP	5,774	$390K	0.58%
4244	LWLAMB WESTON HLDGS INC	5,033	$390K	0.58%
4245	PRSPPERSPECTA INC	13,379	$389K	0.58%
4246	—NATIONAL CINEMEDIA INC	84,100	$389K	0.58%	Put
4247	CNXCCONCENTRIX CORP	2,600	$389K	0.58%	Call
4248	JEFJEFFERIES FINL GROUP INC	12,900	$388K	0.57%	Put
4249	ACIUAC IMMUNE SA	51,000	$388K	0.57%	Call
4250	ECECOPETROL S A	30,300	$388K	0.57%
4251	VRNSVARONIS SYS INC	7,561	$388K	0.57%
4252	—CEDAR FAIR L P	7,800	$388K	0.57%	Put
4253	—GREENBRIER COS INC	8,200	$387K	0.57%	Call
4254	UANCVR PARTNERS LP	9,600	$387K	0.57%	Put
4255	—THE9 LTD	12,400	$387K	0.57%	Put
4256	—GTT COMMUNICATIONS INC	210,800	$386K	0.57%	Call
4257	ATSG*AIR TRANSPORT SERVICES GRP I	13,173	$385K	0.57%
4258	PPCPILGRIMS PRIDE CORP	16,200	$385K	0.57%	Call
4259	ECLECOLAB INC	1,800	$385K	0.57%	Put
4260	ZIONZIONS BANCORPORATION N A	7,000	$385K	0.57%	Put
4261	MRVIMARAVAI LIFESCIENCES HLDGS I	10,800	$385K	0.57%	Call
4262	—BLUCORA INC	23,100	$384K	0.57%	Call
4263	—ACACIA RESH CORP	57,700	$384K	0.57%	Call
4264	EDAPEDAP TMS S A	45,700	$384K	0.57%	Call
4265	ARLOARLO TECHNOLOGIES INC	61,100	$384K	0.57%	Call
4266	CMBTEURONAV NV	42,000	$384K	0.57%	Call
4267	—MERIDIAN BIOSCIENCE INC	14,600	$383K	0.57%	Put
4268	—FS KKR CAP CORP II	19,600	$383K	0.57%	Put
4269	IMVTIMMUNOVANT INC	23,900	$383K	0.57%	Put
4270	UISUNISYS CORP	15,030	$382K	0.57%
4271	—ABIOMED INC	1,200	$382K	0.57%	Put
4272	—KALEYRA INC	27,000	$381K	0.56%	Put
4273	—M D C HLDGS INC	6,400	$380K	0.56%	Call
4274	FNDFLOOR & DECOR HLDGS INC	3,967	$379K	0.56%
4275	AMSCAMERICAN SUPERCONDUCTOR CORP	20,000	$379K	0.56%	Call
4276	—MICRO FOCUS INTL PLC	49,300	$379K	0.56%	Call
4277	EQIXEQUINIX INC	556	$378K	0.56%
4278	PAYSPAYSIGN INC	86,500	$378K	0.56%	Put
4279	OMCOMNICOM GROUP INC	5,100	$378K	0.56%	Call
4280	DACDANAOS CORPORATION	7,615	$378K	0.56%
4281	—MSG NETWORK INC	25,100	$378K	0.56%	Put
4282	PXLWPIXELWORKS INC	114,300	$378K	0.56%	Call
4283	ROICUSDRETAIL OPPORTUNITY INVTS COR	23,835	$378K	0.56%
4284	LSCCLATTICE SEMICONDUCTOR CORP	8,400	$378K	0.56%	Put
4285	MRSHMARSH & MCLENNAN COS INC	3,100	$378K	0.56%	Put
4286	ANGOANGIODYNAMICS INC	16,100	$377K	0.56%	Call
4287	—DUKE REALTY CORP	900	$377K	0.56%	Call
4288	TPHTRI POINTE HOMES INC	18,500	$377K	0.56%	Put
4289	—VIAD CORP	9,000	$376K	0.56%	Call
4290	JBLJABIL INC	7,200	$376K	0.56%	Call
4291	—PERFICIENT INC	6,400	$376K	0.56%	Put
4292	TRHCEURTABULA RASA HEALTHCARE INC	8,154	$375K	0.56%
4293	—NEW GOLD INC CDA	243,200	$375K	0.56%	Put
4294	0HJQAVEO PHARMACEUTICALS INC	51,251	$375K	0.56%
4295	—COOPER TIRE & RUBR CO	6,700	$375K	0.56%	Call
4296	DFSEURDISCOVER FINL SVCS	3,944	$375K	0.56%
4297	AKBAAKEBIA THERAPEUTICS INC	110,600	$374K	0.55%	Put
4298	YALAYALLA GROUP LTD	14,972	$374K	0.55%
4299	—TRITERRAS INC	51,500	$373K	0.55%	Put
4300	WMGWARNER MUSIC GROUP CORP	10,853	$373K	0.55%

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