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
1201	ETDETHAN ALLEN INTERIORS INC	13,000	$359K	0.53%	Call
1202	BMTABRITISH AMERN TOB PLC	9,255	$359K	0.53%
1203	—CF FIN ACQUISITION CORP III	35,800	$358K	0.53%	Call
1204	—WASHINGTON PRIME GROUP NEW	160,700	$358K	0.53%	Put
1205	—SESEN BIO INC	136,800	$356K	0.53%	Call
1206	—ZOGENIX INC	18,261	$356K	0.53%
1207	EAFGRAFTECH INTL LTD	29,100	$356K	0.53%	Call
1208	—AVROBIO INC	27,967	$355K	0.53%
1209	—CMC MATERIALS INC	200	$354K	0.52%	Call
1210	SPNSSAPIENS INTL CORP N V	11,100	$353K	0.52%
1211	—NEPTUNE WELLNESS SOLUTIONS I	269,200	$353K	0.52%	Put
1212	GLOBGLOBANT S A	1,700	$353K	0.52%	Put
1213	—ALTIMAR ACQUISITION CORP	35,700	$353K	0.52%	Put
1214	LPSNLIVEPERSON INC	6,700	$353K	0.52%	Put
1215	CVICVR ENERGY INC	18,400	$353K	0.52%	Call
1216	CTRNCITI TRENDS INC	4,200	$352K	0.52%	Call
1217	OTICEUROTONOMY INC	138,187	$352K	0.52%
1218	TBCHTURTLE BEACH CORP	13,200	$352K	0.52%	Call
1219	—KIMCO RLTY CORP	18,700	$351K	0.52%	Call
1220	—TUSCAN HLDGS CORP	28,500	$351K	0.52%	Put
1221	—BRIGHTHOUSE FINL INC	7,900	$350K	0.52%	Put
1222	—IT TECH PACKAGING INC	528,800	$349K	0.52%	Call
1223	—CHIMERIX INC	36,200	$349K	0.52%	Put
1224	RYROYAL BK CDA	3,781	$349K	0.52%
1225	DKLDELEK LOGISTICS PARTNERS LP	9,700	$349K	0.52%	Call
1226	—AVID BIOSERVICES INC	19,100	$348K	0.52%	Call
1227	CPRXCATALYST PHARMACEUTICALS INC	75,300	$347K	0.51%	Call
1228	—AEGON N V	73,400	$347K	0.51%	Put
1229	ONITOCWEN FINL CORP	12,200	$347K	0.51%	Call
1230	—CALAMP CORP	31,900	$346K	0.51%	Call
1231	—SMTC CORP	57,369	$345K	0.51%
1232	EVREVERCORE INC	2,620	$345K	0.51%
1233	ALCALCON AG	4,900	$344K	0.51%	Put
1234	—FORESIGHT AUTONOMOUS HLDGS L	54,800	$343K	0.51%	Call
1235	FTEKFUEL TECH INC	109,300	$343K	0.51%	Call
1236	—PROTHENA CORP PLC	13,600	$342K	0.51%	Call
1237	—CARLOTZ INC	47,900	$342K	0.51%	Put
1238	—ALTIMAR ACQUISITION CORP	34,627	$342K	0.51%
1239	FRHCFREEDOM HLDG CORP NEV	6,416	$342K	0.51%
1240	CTASCINTAS CORP	1,000	$341K	0.51%	Put
1241	INCYINCYTE CORP	4,200	$341K	0.51%	Put
1242	AMBAAMBARELLA INC	3,400	$341K	0.51%	Put
1243	KEYKEYCORP	17,000	$340K	0.50%	Put
1244	ANDEANDERSONS INC	12,400	$340K	0.50%	Call
1245	ACIWACI WORLDWIDE INC	8,900	$339K	0.50%	Call
1246	COLMCOLUMBIA SPORTSWEAR CO	3,210	$339K	0.50%
1247	—XINYUAN REAL ESTATE CO LTD	120,500	$339K	0.50%	Put
1248	AGIALAMOS GOLD INC NEW	43,300	$338K	0.50%	Call
1249	—SERVICE CORP INTL	6,600	$337K	0.50%	Put
1250	CMRECOSTAMARE INC	34,900	$336K	0.50%	Call
1251	BTUPEABODY ENGR CORP	109,700	$336K	0.50%	Call
1252	—CLOOPEN GROUP HOLDING LIMITE	24,500	$336K	0.50%	Put
1253	PTCTPTC THERAPEUTICS INC	7,100	$336K	0.50%	Put
1254	—GORES HOLDINGS VI INC	24,500	$336K	0.50%	Call
1255	—BIOCEPT INC	6,600	$336K	0.50%	Call
1256	—INTERPUBLIC GROUP COS INC	11,500	$336K	0.50%	Call
1257	RSRELIANCE STEEL & ALUMINUM CO	2,200	$335K	0.50%
1258	CCECCAPITAL PRODUCT PARTNERS L P	30,118	$335K	0.50%
1259	—VIVOPOWER INTERNATIONAL PLC	33,255	$335K	0.50%
1260	CMBTEURONAV NV	36,600	$335K	0.50%	Put
1261	RVTYPERKINELMER INC	2,600	$334K	0.49%	Call
1262	—STRONGBRIDGE BIOPHARMA PLC	120,700	$333K	0.49%	Call
1263	EYENATIONAL VISION HLDGS INC	7,600	$333K	0.49%	Call
1264	—GLOBUS MED INC	5,400	$333K	0.49%	Put
1265	—VEREIT INC	8,600	$332K	0.49%	Put
1266	CBCVR ENERGY INC	17,300	$332K	0.49%
1267	CHS1USDCHICOS FAS INC	100,420	$332K	0.49%
1268	—NEOPHOTONICS CORP	27,744	$332K	0.49%
1269	LN5LANNET INC	62,865	$332K	0.49%
1270	SATSECHOSTAR CORP	13,800	$331K	0.49%	Put
1271	AMRCAMERESCO INC	6,800	$331K	0.49%	Call
1272	IMGIAMGOLD CORP	111,137	$331K	0.49%
1273	—CORNERSTONE ONDEMAND INC	7,600	$331K	0.49%	Call
1274	ATEXANTERIX INC	7,000	$330K	0.49%	Call
1275	ICLKGBPICLICK INTERACTIVE ASIA GROU	28,071	$330K	0.49%
1276	—LIVEXLIVE MEDIA INC	75,870	$329K	0.49%
1277	CYTKCYTOKINETICS INC	14,100	$328K	0.49%	Put
1278	RVLVREVOLVE GROUP INC	7,300	$328K	0.49%	Put
1279	WHWYNDHAM HOTELS & RESORTS INC	4,700	$328K	0.49%	Put
1280	KLICKULICKE & SOFFA INDS INC	6,683	$328K	0.49%
1281	XIFRNEXTERA ENERGY PARTNERS LP	4,500	$328K	0.49%	Put
1282	—DAVIDSTEA INC	87,200	$328K	0.49%	Put
1283	FSKFS KKR CAP CORP	16,500	$327K	0.48%	Put
1284	WVEWAVE LIFE SCIENCES LTD	58,253	$327K	0.48%
1285	ESPRESPERION THERAPEUTICS INC NE	11,642	$327K	0.48%
1286	GKOSGLAUKOS CORP	3,900	$327K	0.48%	Call
1287	—NAVISTAR INTL CORP NEW	7,400	$326K	0.48%	Put
1288	—OTONOMY INC	127,800	$326K	0.48%	Call
1289	—AVADEL PHARMACEUTICALS PLC	36,100	$326K	0.48%	Put
1290	YUMYUM BRANDS INC	3,000	$325K	0.48%	Put
1291	—LSB INDS INC	63,400	$325K	0.48%	Call
1292	—REALOGY HLDGS CORP	21,500	$325K	0.48%	Call
1293	IEPICAHN ENTERPRISES LP	6,050	$325K	0.48%
1294	—DOMTAR CORP	8,800	$325K	0.48%	Put
1295	LEUCENTRUS ENERGY CORP	13,700	$325K	0.48%	Put
1296	—ADAMIS PHARMACEUTICALS CORP	344,800	$324K	0.48%	Call
1297	—RUTHS HOSPITALITY GROUP INC	13,000	$323K	0.48%	Call
1298	BBWBUILD-A-BEAR WORKSHOP INC	46,622	$322K	0.48%
1299	IPIINTREPID POTASH INC	9,900	$322K	0.48%	Call
1300	—APARTMENT INVT & MGMT CO	52,500	$322K	0.48%	Put

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