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
1101	—REXNORD CORP	8,300	$391K	0.58%	Put
1102	BSMBLACK STONE MINERALS L P	44,800	$391K	0.58%	Put
1103	—PETIQ INC	11,100	$391K	0.58%	Call
1104	—PATTERSON COS INC	12,200	$390K	0.58%	Call
1105	PUMPPROPETRO HLDG CORP	36,591	$390K	0.58%
1106	—MARINUS PHARMACEUTICALS INC	25,200	$390K	0.58%	Call
1107	LWLAMB WESTON HLDGS INC	5,033	$390K	0.58%
1108	ABEVAMBEV SA	142,447	$390K	0.58%
1109	AOSSMITH A O CORP	5,774	$390K	0.58%
1110	—NATIONAL CINEMEDIA INC	84,100	$389K	0.58%	Put
1111	CNXCCONCENTRIX CORP	2,600	$389K	0.58%	Call
1112	PRSPPERSPECTA INC	13,379	$389K	0.58%
1113	ACIUAC IMMUNE SA	51,000	$388K	0.57%	Call
1114	—CEDAR FAIR L P	7,800	$388K	0.57%	Put
1115	ECECOPETROL S A	30,300	$388K	0.57%
1116	VRNSVARONIS SYS INC	7,561	$388K	0.57%
1117	—JEFFERIES FINL GROUP INC	12,900	$388K	0.57%	Put
1118	—GREENBRIER COS INC	8,200	$387K	0.57%	Call
1119	—THE9 LTD	12,400	$387K	0.57%	Put
1120	UANCVR PARTNERS LP	9,600	$387K	0.57%	Put
1121	—GTT COMMUNICATIONS INC	210,800	$386K	0.57%	Call
1122	ZIONZIONS BANCORPORATION N A	7,000	$385K	0.57%	Put
1123	ATSG*AIR TRANSPORT SERVICES GRP I	13,173	$385K	0.57%
1124	MRVIMARAVAI LIFESCIENCES HLDGS I	10,800	$385K	0.57%	Call
1125	ECLECOLAB INC	1,800	$385K	0.57%	Put
1126	PPCPILGRIMS PRIDE CORP	16,200	$385K	0.57%	Call
1127	EDAPEDAP TMS S A	45,700	$384K	0.57%	Call
1128	ARLOARLO TECHNOLOGIES INC	61,100	$384K	0.57%	Call
1129	—ACACIA RESH CORP	57,700	$384K	0.57%	Call
1130	—BLUCORA INC	23,100	$384K	0.57%	Call
1131	CMBTEURONAV NV	42,000	$384K	0.57%	Call
1132	IMVTIMMUNOVANT INC	23,900	$383K	0.57%	Put
1133	—FS KKR CAP CORP II	19,600	$383K	0.57%	Put
1134	—MERIDIAN BIOSCIENCE INC	14,600	$383K	0.57%	Put
1135	UISUNISYS CORP	15,030	$382K	0.57%
1136	—ABIOMED INC	1,200	$382K	0.57%	Put
1137	ARKTARK ETF TR	3,177,600	$381K	0.56%	Call
1138	—KALEYRA INC	27,000	$381K	0.56%	Put
1139	—M D C HLDGS INC	6,400	$380K	0.56%	Call
1140	AMSCAMERICAN SUPERCONDUCTOR CORP	20,000	$379K	0.56%	Call
1141	FNDFLOOR & DECOR HLDGS INC	3,967	$379K	0.56%
1142	—MICRO FOCUS INTL PLC	49,300	$379K	0.56%	Call
1143	PXLWPIXELWORKS INC	114,300	$378K	0.56%	Call
1144	DACDANAOS CORPORATION	7,615	$378K	0.56%
1145	LSCCLATTICE SEMICONDUCTOR CORP	8,400	$378K	0.56%	Put
1146	MRSHMARSH & MCLENNAN COS INC	3,100	$378K	0.56%	Put
1147	—MSG NETWORK INC	25,100	$378K	0.56%	Put
1148	EQIXEQUINIX INC	556	$378K	0.56%
1149	OMCOMNICOM GROUP INC	5,100	$378K	0.56%	Call
1150	PAYSPAYSIGN INC	86,500	$378K	0.56%	Put
1151	ROICUSDRETAIL OPPORTUNITY INVTS COR	23,835	$378K	0.56%
1152	TPHTRI POINTE HOMES INC	18,500	$377K	0.56%	Put
1153	ANGOANGIODYNAMICS INC	16,100	$377K	0.56%	Call
1154	—DUKE REALTY CORP	900	$377K	0.56%	Call
1155	—VIAD CORP	9,000	$376K	0.56%	Call
1156	JBLJABIL INC	7,200	$376K	0.56%	Call
1157	—PERFICIENT INC	6,400	$376K	0.56%	Put
1158	TRHCEURTABULA RASA HEALTHCARE INC	8,154	$375K	0.56%
1159	0HJQAVEO PHARMACEUTICALS INC	51,251	$375K	0.56%
1160	—NEW GOLD INC CDA	243,200	$375K	0.56%	Put
1161	DFSEURDISCOVER FINL SVCS	3,944	$375K	0.56%
1162	—COOPER TIRE & RUBR CO	6,700	$375K	0.56%	Call
1163	YALAYALLA GROUP LTD	14,972	$374K	0.55%
1164	AKBAAKEBIA THERAPEUTICS INC	110,600	$374K	0.55%	Put
1165	—SUNWORKS INC	25,400	$373K	0.55%	Call
1166	PRCHPORCH GROUP INC	21,100	$373K	0.55%	Put
1167	WMGWARNER MUSIC GROUP CORP	10,853	$373K	0.55%
1168	—TRITERRAS INC	51,500	$373K	0.55%	Put
1169	—MITEK SYS INC	25,500	$372K	0.55%	Put
1170	DISCAUSDDISCOVERY INC	8,563	$372K	0.55%
1171	—FORESIGHT AUTONOMOUS HLDGS L	59,462	$372K	0.55%
1172	—RAVEN INDS INC	9,700	$372K	0.55%	Put
1173	—ORCHID IS CAP INC	61,900	$372K	0.55%	Call
1174	—APPLIED GENETIC TECHNOLOGIES	73,407	$372K	0.55%
1175	BHRBRAEMAR HOTELS & RESORTS INC	60,900	$370K	0.55%	Put
1176	TSQTOWNSQUARE MEDIA INC	34,500	$370K	0.55%	Call
1177	—LINCOLN ELEC HLDGS INC	300	$369K	0.55%	Call
1178	LLOEWS CORP	7,200	$369K	0.55%	Put
1179	INSPINSPIRE MED SYS INC	1,781	$369K	0.55%
1180	—CONTANGO OIL & GAS CO	94,400	$368K	0.55%	Put
1181	PRTSCARPARTS COM INC	25,800	$368K	0.55%	Put
1182	—GCP APPLIED TECHNOLOGIES INC	1,500	$368K	0.55%	Call
1183	GWREGUIDEWIRE SOFTWARE INC	3,616	$367K	0.54%
1184	MFICLAPOLLO INVT CORP	26,700	$366K	0.54%	Call
1185	VOOVANGUARD INDEX FDS	1,006	$366K	0.54%
1186	NTRANATERA INC	3,600	$366K	0.54%	Put
1187	—SYNOVUS FINL CORP	8,000	$366K	0.54%	Call
1188	CSTECAESARSTONE LTD	26,556	$365K	0.54%
1189	BBDCBARINGS BDC INC	36,500	$364K	0.54%	Call
1190	CHUYUSDCHUYS HLDGS INC	8,221	$364K	0.54%
1191	BALLBALL CORP	4,300	$364K	0.54%	Call
1192	BCCBOISE CASCADE CO DEL	6,081	$364K	0.54%
1193	AMKRAMKOR TECHNOLOGY INC	15,300	$363K	0.54%	Put
1194	AMDADVANCED MICRO DEVICES INC	4,616,500	$362K	0.54%	Call
1195	CGENCOMPUGEN LTD	42,100	$362K	0.54%	Call
1196	SJTSAN JUAN BASIN RTY TR	91,300	$362K	0.54%	Call
1197	—COREPOINT LODGING INC	39,979	$361K	0.53%
1198	NUSNU SKIN ENTERPRISES INC	6,800	$360K	0.53%	Put
1199	ZLABZAI LAB LTD	2,700	$360K	0.53%	Put
1200	BMTABRITISH AMERN TOB PLC	9,255	$359K	0.53%

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