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
5101	UDRUDR INC	3,900	$171K	0.25%	Call
5102	—LTC PPTYS INC	4,100	$171K	0.25%	Call
5103	NMPGYNAVIOS MARITIME HOLDINGS INC	19,471	$171K	0.25%
5104	—SCIPLAY CORPORATION	10,500	$170K	0.25%	Call
5105	CNPCENTERPOINT ENERGY INC	7,500	$170K	0.25%	Put
5106	APPFAPPFOLIO INC	1,200	$170K	0.25%	Call
5107	SJR/BEURSHAW COMMUNICATIONS INC	6,500	$170K	0.25%
5108	—NOBLE MIDSTREAM PARTNERS LP	11,700	$170K	0.25%	Put
5109	LOMALOMA NEGRA CORP	26,800	$170K	0.25%	Call
5110	—BSQUARE CORP	49,600	$170K	0.25%	Call
5111	WKCWORLD FUEL SVCS CORP	4,800	$169K	0.25%	Put
5112	—ZOVIO INC	41,600	$169K	0.25%	Put
5113	AMRXAMNEAL PHARMACEUTICALS INC	25,134	$169K	0.25%
5114	SPHSUBURBAN PROPANE PARTNERS L	11,420	$169K	0.25%
5115	GELGENESIS ENERGY L P	18,100	$169K	0.25%	Call
5116	—VERASTEM INC	68,400	$169K	0.25%	Put
5117	BTAIBIOXCEL THERAPEUTICS INC	3,900	$168K	0.25%	Call
5118	—WESTLAKE CHEM PARTNERS LP	700	$168K	0.25%	Call
5119	—RELIANCE STEEL & ALUMINUM CO	1,100	$168K	0.25%	Put
5120	—METHODE ELECTRS INC	400	$168K	0.25%	Call
5121	—VISLINK TECHNOLOGIES INC	57,200	$168K	0.25%	Put
5122	REPLREPLIMUNE GROUP INC	5,500	$168K	0.25%
5123	—HUNT J B TRANS SVCS INC	1,000	$168K	0.25%	Put
5124	ACGLARCH CAP GROUP LTD	4,375	$168K	0.25%
5125	TRI4EURTHOMSON REUTERS CORP.	1,916	$168K	0.25%
5126	—TELEFONICA BRASIL SA	21,300	$168K	0.25%	Put
5127	—CLEARSIDE BIOMEDICAL INC	67,900	$168K	0.25%	Call
5128	—AGENUS INC	61,400	$167K	0.25%	Put
5129	KROKRONOS WORLDWIDE INC	10,900	$167K	0.25%	Call
5130	VTEBVANGUARD TAX-MANAGED INTL FD	3,400	$167K	0.25%	Call
5131	FMCFMC CORP	1,500	$166K	0.25%	Put
5132	BKEBUCKLE INC	4,223	$166K	0.25%
5133	—ZOGENIX INC	8,500	$166K	0.25%	Put
5134	—ALASKA COMMUNICATIONS SYS GR	51,200	$166K	0.25%	Put
5135	SLQTSELECTQUOTE INC	5,600	$165K	0.24%	Put
5136	NVGSNAVIGATOR HLDGS LTD	18,500	$165K	0.24%
5137	PRGPROG HOLDINGS INC	3,800	$165K	0.24%	Put
5138	—IHS MARKIT LTD	1,700	$165K	0.24%	Put
5139	—TYME TECHNOLOGIES INC	92,000	$164K	0.24%	Put
5140	—WELBILT INC	10,100	$164K	0.24%	Put
5141	—ATHERSYS INC NEW	91,252	$164K	0.24%
5142	LGIHLGI HOMES INC	1,100	$164K	0.24%	Call
5143	TPCTUTOR PERINI CORP	8,600	$163K	0.24%	Put
5144	GRBKGREEN BRICK PARTNERS INC	7,190	$163K	0.24%
5145	—BROADMARK RLTY CAP INC	15,600	$163K	0.24%
5146	ASPNASPEN AEROGELS INC	8,012	$163K	0.24%
5147	PCRXPACIRA BIOSCIENCES INC	2,315	$162K	0.24%
5148	—SELECTA BIOSCIENCES INC	35,800	$162K	0.24%	Put
5149	CENTCENTRAL GARDEN & PET CO	2,800	$162K	0.24%
5150	SUNSUNOCO LP/SUNOCO FIN CORP	5,100	$162K	0.24%	Put
5151	—ABERDEEN STD GOLD ETF TR	9,900	$162K	0.24%	Call
5152	—NEPTUNE WELLNESS SOLUTIONS I	122,797	$161K	0.24%
5153	—WEINGARTEN RLTY INVS	600	$161K	0.24%	Call
5154	ALLALLSTATE CORP	1,400	$161K	0.24%	Put
5155	IRDMIRIDIUM COMMUNICATIONS INC	3,900	$161K	0.24%	Put
5156	—BGC PARTNERS INC	33,200	$160K	0.24%	Put
5157	—VEECO INSTRS INC DEL	7,700	$160K	0.24%	Call
5158	—GRITSTONE ONCOLOGY INC	17,000	$160K	0.24%	Put
5159	NEWTNEWTEK BUSINESS SVCS CORP	5,994	$160K	0.24%
5160	—SHYFT GROUP INC	4,300	$160K	0.24%	Call
5161	DIODDIODES INC	2,000	$160K	0.24%	Call
5162	SRESEMPRA ENERGY	1,204	$160K	0.24%
5163	—ORCHARD THERAPEUTICS PLC	21,900	$159K	0.24%	Call
5164	—ONTRAK INC	4,893	$159K	0.24%
5165	ISRGINTUITIVE SURGICAL INC	214,800	$159K	0.24%	Call
5166	—AIR TRANSPORT SERVICES GRP I	5,400	$158K	0.23%	Put
5167	ATKRATKORE INC	2,200	$158K	0.23%	Put
5168	BDNBRANDYWINE RLTY TR	12,200	$158K	0.23%	Put
5169	—COWEN INC	4,500	$158K	0.23%	Call
5170	CAASCHINA AUTOMOTIVE SYS INC	33,300	$158K	0.23%	Put
5171	—SOUTH JERSEY INDS INC	7,000	$158K	0.23%	Put
5172	ATOATMOS ENERGY CORP	1,600	$158K	0.23%	Put
5173	—WASHINGTON PRIME GROUP NEW	70,668	$158K	0.23%
5174	—RITCHIE BROS AUCTIONEERS	2,700	$158K	0.23%	Put
5175	VITLVITAL FARMS INC	7,200	$157K	0.23%	Call
5176	—GASLOG LTD	27,000	$156K	0.23%	Call
5177	ENVAENOVA INTL INC	4,400	$156K	0.23%	Put
5178	—WORLD ACCEP CORPORATION	1,200	$156K	0.23%	Call
5179	ENOVCOLFAX CORP	3,542	$155K	0.23%
5180	—PRECISION BIOSCIENCES INC	15,000	$155K	0.23%	Call
5181	—PREFERRED APT CMNTYS INC	15,700	$155K	0.23%	Call
5182	AMNAMN HEALTHCARE SVCS INC	2,100	$155K	0.23%	Call
5183	—DPCM CAP INC	15,700	$155K	0.23%	Call
5184	TNKTEEKAY TANKERS LTD	11,148	$155K	0.23%
5185	NVEEUSDNV5 GLOBAL INC	1,608	$155K	0.23%
5186	—EQUITRANS MIDSTREAM CORP	19,000	$155K	0.23%	Call
5187	IMVTIMMUNOVANT INC	9,626	$154K	0.23%
5188	—XERIS PHARMACEUTICALS INC	34,100	$154K	0.23%	Put
5189	TUSKMAMMOTH ENERGY SVCS INC	28,900	$154K	0.23%	Call
5190	NNNNATIONAL RETAIL PROPERTIES I	3,500	$154K	0.23%	Put
5191	—NATUS MED INC DEL	600	$154K	0.23%	Call
5192	—PRA HEALTH SCIENCES INC	100	$153K	0.23%	Call
5193	—CATALYST BIOSCIENCES INC	30,400	$153K	0.23%	Put
5194	REPLREPLIMUNE GROUP INC	5,000	$153K	0.23%	Call
5195	CRNTCERAGON NETWORKS LTD	40,405	$152K	0.23%
5196	KTKT CORP	12,200	$152K	0.23%	Put
5197	—CRESCENT PT ENERGY CORP	36,400	$152K	0.23%	Call
5198	HRIHERC HLDGS INC	1,500	$152K	0.23%	Put
5199	ARAYACCURAY INC	30,800	$152K	0.23%	Put
5200	BFPBANCO BBVA ARGENTINA S A	55,306	$151K	0.22%

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