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
4301	—TRITERRAS INC	51,500	$373K	0.55%	Put
4302	PRCHPORCH GROUP INC	21,100	$373K	0.55%	Put
4303	—ORCHID IS CAP INC	61,900	$372K	0.55%	Call
4304	MITKMITEK SYS INC	25,500	$372K	0.55%	Put
4305	—FORESIGHT AUTONOMOUS HLDGS L	59,462	$372K	0.55%
4306	DISCAUSDDISCOVERY INC	8,563	$372K	0.55%
4307	—RAVEN INDS INC	9,700	$372K	0.55%	Put
4308	—APPLIED GENETIC TECHNOLOGIES	73,407	$372K	0.55%
4309	BHRBRAEMAR HOTELS & RESORTS INC	60,900	$370K	0.55%	Put
4310	TSQTOWNSQUARE MEDIA INC	34,500	$370K	0.55%	Call
4311	LECOLINCOLN ELEC HLDGS INC	300	$369K	0.55%	Call
4312	INSPINSPIRE MED SYS INC	1,781	$369K	0.55%
4313	LLOEWS CORP	7,200	$369K	0.55%	Put
4314	—GCP APPLIED TECHNOLOGIES INC	1,500	$368K	0.55%	Call
4315	—CONTANGO OIL & GAS CO	94,400	$368K	0.55%	Put
4316	PRTSCARPARTS COM INC	25,800	$368K	0.55%	Put
4317	GWREGUIDEWIRE SOFTWARE INC	3,616	$367K	0.54%
4318	MFICLAPOLLO INVT CORP	26,700	$366K	0.54%	Call
4319	—SYNOVUS FINL CORP	8,000	$366K	0.54%	Call
4320	NTRANATERA INC	3,600	$366K	0.54%	Put
4321	VOOVANGUARD INDEX FDS	1,006	$366K	0.54%
4322	CSTECAESARSTONE LTD	26,556	$365K	0.54%
4323	BALLBALL CORP	4,300	$364K	0.54%	Call
4324	BCCBOISE CASCADE CO DEL	6,081	$364K	0.54%
4325	BBDCBARINGS BDC INC	36,500	$364K	0.54%	Call
4326	CHUYUSDCHUYS HLDGS INC	8,221	$364K	0.54%
4327	AMKRAMKOR TECHNOLOGY INC	15,300	$363K	0.54%	Put
4328	SJTSAN JUAN BASIN RTY TR	91,300	$362K	0.54%	Call
4329	CGENCOMPUGEN LTD	42,100	$362K	0.54%	Call
4330	—COREPOINT LODGING INC	39,979	$361K	0.53%
4331	NUSNU SKIN ENTERPRISES INC	6,800	$360K	0.53%	Put
4332	ZLABZAI LAB LTD	2,700	$360K	0.53%	Put
4333	ETDETHAN ALLEN INTERIORS INC	13,000	$359K	0.53%	Call
4334	SAICSCIENCE APPLICATIONS INTL CO	4,300	$359K	0.53%	Call
4335	BMTABRITISH AMERN TOB PLC	9,255	$359K	0.53%
4336	—CF FIN ACQUISITION CORP III	35,800	$358K	0.53%	Call
4337	—WASHINGTON PRIME GROUP NEW	160,700	$358K	0.53%	Put
4338	EAFGRAFTECH INTL LTD	29,100	$356K	0.53%	Call
4339	—SESEN BIO INC	136,800	$356K	0.53%	Call
4340	—ZOGENIX INC	18,261	$356K	0.53%
4341	AVROAVROBIO INC	27,967	$355K	0.53%
4342	—CMC MATERIALS INC	200	$354K	0.52%	Call
4343	CVICVR ENERGY INC	18,400	$353K	0.52%	Call
4344	—ALTIMAR ACQUISITION CORP	35,700	$353K	0.52%	Put
4345	—NEPTUNE WELLNESS SOLUTIONS I	269,200	$353K	0.52%	Put
4346	SPNSSAPIENS INTL CORP N V	11,100	$353K	0.52%
4347	LPSNLIVEPERSON INC	6,700	$353K	0.52%	Put
4348	GLOBGLOBANT S A	1,700	$353K	0.52%	Put
4349	CTRNCITI TRENDS INC	4,200	$352K	0.52%	Call
4350	TBCHTURTLE BEACH CORP	13,200	$352K	0.52%	Call
4351	OTICEUROTONOMY INC	138,187	$352K	0.52%
4352	KIMKIMCO RLTY CORP	18,700	$351K	0.52%	Call
4353	—TUSCAN HLDGS CORP	28,500	$351K	0.52%	Put
4354	BHFALBRIGHTHOUSE FINL INC	7,900	$350K	0.52%	Put
4355	—CHIMERIX INC	36,200	$349K	0.52%	Put
4356	RYROYAL BK CDA	3,781	$349K	0.52%
4357	DKLDELEK LOGISTICS PARTNERS LP	9,700	$349K	0.52%	Call
4358	—IT TECH PACKAGING INC	528,800	$349K	0.52%	Call
4359	—AVID BIOSERVICES INC	19,100	$348K	0.52%	Call
4360	—AEGON N V	73,400	$347K	0.51%	Put
4361	CPRXCATALYST PHARMACEUTICALS INC	75,300	$347K	0.51%	Call
4362	ONITOCWEN FINL CORP	12,200	$347K	0.51%	Call
4363	—CALAMP CORP	31,900	$346K	0.51%	Call
4364	—SMTC CORP	57,369	$345K	0.51%
4365	EVREVERCORE INC	2,620	$345K	0.51%
4366	ALCALCON AG	4,900	$344K	0.51%	Put
4367	FTEKFUEL TECH INC	109,300	$343K	0.51%	Call
4368	—FORESIGHT AUTONOMOUS HLDGS L	54,800	$343K	0.51%	Call
4369	—ALTIMAR ACQUISITION CORP	34,627	$342K	0.51%
4370	—CARLOTZ INC	47,900	$342K	0.51%	Put
4371	FRHCFREEDOM HLDG CORP NEV	6,416	$342K	0.51%
4372	—PROTHENA CORP PLC	13,600	$342K	0.51%	Call
4373	AMBAAMBARELLA INC	3,400	$341K	0.51%	Put
4374	CTASCINTAS CORP	1,000	$341K	0.51%	Put
4375	INCYINCYTE CORP	4,200	$341K	0.51%	Put
4376	KEYKEYCORP	17,000	$340K	0.50%	Put
4377	ANDEANDERSONS INC	12,400	$340K	0.50%	Call
4378	—XINYUAN REAL ESTATE CO LTD	120,500	$339K	0.50%	Put
4379	COLMCOLUMBIA SPORTSWEAR CO	3,210	$339K	0.50%
4380	ACIWACI WORLDWIDE INC	8,900	$339K	0.50%	Call
4381	AGIALAMOS GOLD INC NEW	43,300	$338K	0.50%	Call
4382	—SERVICE CORP INTL	6,600	$337K	0.50%	Put
4383	—INTERPUBLIC GROUP COS INC	11,500	$336K	0.50%	Call
4384	BTUPEABODY ENGR CORP	109,700	$336K	0.50%	Call
4385	PTCTPTC THERAPEUTICS INC	7,100	$336K	0.50%	Put
4386	—CLOOPEN GROUP HOLDING LIMITE	24,500	$336K	0.50%	Put
4387	CMRECOSTAMARE INC	34,900	$336K	0.50%	Call
4388	—GORES HOLDINGS VI INC	24,500	$336K	0.50%	Call
4389	—BIOCEPT INC	6,600	$336K	0.50%	Call
4390	RSRELIANCE STEEL & ALUMINUM CO	2,200	$335K	0.50%
4391	—VIVOPOWER INTERNATIONAL PLC	33,255	$335K	0.50%
4392	CCECCAPITAL PRODUCT PARTNERS L P	30,118	$335K	0.50%
4393	CMBTEURONAV NV	36,600	$335K	0.50%	Put
4394	RVTYPERKINELMER INC	2,600	$334K	0.49%	Call
4395	—STRONGBRIDGE BIOPHARMA PLC	120,700	$333K	0.49%	Call
4396	EYENATIONAL VISION HLDGS INC	7,600	$333K	0.49%	Call
4397	—GLOBUS MED INC	5,400	$333K	0.49%	Put
4398	LN5LANNET INC	62,865	$332K	0.49%
4399	—VEREIT INC	8,600	$332K	0.49%	Put
4400	CBCVR ENERGY INC	17,300	$332K	0.49%

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