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
1301	EP3ORASURE TECHNOLOGIES INC	27,496	$321K	0.48%
1302	CDNACAREDX INC	4,700	$320K	0.47%	Put
1303	BJRIBJS RESTAURANTS INC	5,500	$319K	0.47%	Call
1304	CHKPCHECK POINT SOFTWARE TECH LT	2,845	$319K	0.47%
1305	—SILK RD MED INC	6,300	$319K	0.47%	Call
1306	TMDXTRANSMEDICS GROUP INC	7,663	$318K	0.47%
1307	TXRHTEXAS ROADHOUSE INC	3,314	$318K	0.47%
1308	WHWYNDHAM HOTELS & RESORTS INC	4,551	$318K	0.47%
1309	CDLXCARDLYTICS INC	2,900	$318K	0.47%	Put
1310	COLMCOLUMBIA SPORTSWEAR CO	3,000	$317K	0.47%	Put
1311	LILALIBERTY LATIN AMERICA LTD	24,700	$317K	0.47%	Call
1312	CORTCORCEPT THERAPEUTICS INC	13,300	$316K	0.47%	Put
1313	PPGPPG INDS INC	2,106	$316K	0.47%
1314	HTGCHERCULES CAPITAL INC	19,714	$316K	0.47%
1315	—INDEPENDENCE RLTY TR INC	20,700	$315K	0.47%	Put
1316	PVG1EURPRETIUM RES INC	30,403	$315K	0.47%
1317	—SPARK NETWORKS SE	42,224	$315K	0.47%
1318	SBHSALLY BEAUTY HLDGS INC	15,600	$314K	0.47%	Call
1319	—DISNEY WALT CO	1,697,500	$313K	0.46%	Call
1320	—GOLDEN ENTMT INC	12,400	$313K	0.46%	Call
1321	—MUSTANG BIO INC	94,400	$313K	0.46%	Put
1322	—ENTERCOM COMMUNICATIONS CORP	59,700	$313K	0.46%	Put
1323	TEXTEREX CORP NEW	6,800	$313K	0.46%	Put
1324	BG3BIG 5 SPORTING GOODS CORP	19,783	$311K	0.46%
1325	ERFGBPENERPLUS CORP	62,157	$311K	0.46%
1326	AQMSEURAQUA METALS INC	76,846	$311K	0.46%
1327	—EMCORE CORP	57,000	$311K	0.46%	Call
1328	NXSTNEXSTAR MEDIA GROUP INC	2,200	$309K	0.46%	Call
1329	—OLD NATL BANCORP IND	16,000	$309K	0.46%	Put
1330	AVNTNAVIENT CORPORATION	21,600	$309K	0.46%	Put
1331	WTWISDOMTREE INVTS INC	49,510	$309K	0.46%
1332	—9 METERS BIOPHARMA INC	264,400	$309K	0.46%	Call
1333	GGENPACT LIMITED	7,200	$308K	0.46%	Put
1334	SKYWSKYWEST INC	5,641	$307K	0.45%
1335	—EVOFEM BIOSCIENCES INC	175,400	$307K	0.45%	Call
1336	—SYNACOR INC	140,300	$307K	0.45%	Call
1337	—POLARITYTE INC	276,000	$306K	0.45%	Call
1338	—BP PRUDHOE BAY RTY TR	81,700	$306K	0.45%	Call
1339	AMWDAMERICAN WOODMARK CORPORATIO	3,100	$306K	0.45%	Call
1340	APLEAPPLE HOSPITALITY REIT INC	21,000	$306K	0.45%	Put
1341	—EQUITY COMWLTH	1,100	$306K	0.45%	Put
1342	—MUSTANG BIO INC	92,100	$306K	0.45%	Call
1343	TSAACI WORLDWIDE INC	8,023	$305K	0.45%
1344	SBACSBA COMMUNICATIONS CORP NEW	1,100	$305K	0.45%	Put
1345	—DECIPHERA PHARMACEUTICALS IN	6,800	$305K	0.45%	Put
1346	URBNURBAN OUTFITTERS INC	8,200	$305K	0.45%	Call
1347	CFRCULLEN FROST BANKERS INC	2,800	$305K	0.45%
1348	—LIBERTY TRIPADVISOR HLDGS IN	47,700	$304K	0.45%	Call
1349	RLMDRELMADA THERAPEUTICS INC	8,600	$303K	0.45%	Call
1350	BNEDBARNES & NOBLE ED INC	37,046	$302K	0.45%
1351	ENVAENOVA INTL INC	8,500	$302K	0.45%	Call
1352	AGCOAGCO CORP	2,100	$302K	0.45%	Put
1353	—ASSERTIO HOLDINGS INC	442,200	$302K	0.45%	Call
1354	ATECALPHATEC HLDGS INC	19,100	$302K	0.45%	Call
1355	TZOOTRAVELZOO	18,000	$302K	0.45%	Call
1356	RCKTROCKET PHARMACEUTICALS INC	6,800	$302K	0.45%	Call
1357	HCCWARRIOR MET COAL INC	17,600	$301K	0.45%	Put
1358	—ORBCOMM INC	39,400	$301K	0.45%	Call
1359	—CHINDATA GROUP HLDGS LTD	18,200	$301K	0.45%	Call
1360	AXONEURSIO GENE THERAPIES INC	114,950	$300K	0.44%
1361	VVVVALVOLINE INC	11,500	$300K	0.44%	Call
1362	ALKALASKA AIR GROUP INC	4,340	$300K	0.44%
1363	ACRSACLARIS THERAPEUTICS INC	11,900	$300K	0.44%	Put
1364	—SK TELECOM LTD	1,100	$300K	0.44%	Call
1365	—GREENSKY INC	48,332	$299K	0.44%
1366	FOSLFOSSIL GROUP INC	24,100	$299K	0.44%	Put
1367	—DONNELLEY R R & SONS CO	73,600	$299K	0.44%	Put
1368	—KOREA ELECTRIC PWR	2,900	$298K	0.44%	Call
1369	—GENPREX INC	69,100	$298K	0.44%	Put
1370	ALDXALDEYRA THERAPEUTICS INC	25,100	$298K	0.44%	Call
1371	—SEELOS THERAPEUTICS INC	59,800	$298K	0.44%	Call
1372	UIUBIQUITI INC	100	$298K	0.44%	Put
1373	UIUBIQUITI INC	100	$298K	0.44%	Call
1374	—SPARK ENERGY INC	27,900	$298K	0.44%	Call
1375	—FREIGHTCAR AMER INC	45,200	$298K	0.44%	Put
1376	—GOLAR LNG PARTNERS LP	85,200	$297K	0.44%	Call
1377	—CALUMET SPECIALTY PRODS PTNR	48,700	$297K	0.44%	Call
1378	CLFDCLEARFIELD INC	9,800	$295K	0.44%	Call
1379	—ARCH CAP GROUP LTD	7,700	$295K	0.44%	Put
1380	—GOHEALTH INC	25,200	$295K	0.44%	Put
1381	NPKINEWPARK RES INC	94,000	$295K	0.44%	Call
1382	—AGEAGLE AERIAL SYS INC NEW	46,900	$294K	0.44%	Put
1383	HLXHELIX ENERGY SOLUTIONS GRP I	58,300	$294K	0.44%	Call
1384	—AURORA MOBILE LTD	69,469	$294K	0.44%
1385	—STEELCASE INC	20,400	$294K	0.44%	Call
1386	TKTEEKAY CORPORATION	91,999	$294K	0.44%
1387	—SIFY TECHNOLOGIES LTD	82,900	$293K	0.43%	Call
1388	MXLMAXLINEAR INC	8,600	$293K	0.43%	Call
1389	OUTOUTFRONT MEDIA INC	13,400	$293K	0.43%	Put
1390	CALMCAL MAINE FOODS INC	7,600	$292K	0.43%	Put
1391	—CATABASIS PHARMACEUTICALS IN	101,162	$292K	0.43%
1392	ARVNARVINAS INC	4,400	$291K	0.43%	Put
1393	—MAKEMYTRIP LIMITED MAURITIUS	9,200	$291K	0.43%	Call
1394	—CELSION CORP	211,100	$291K	0.43%	Call
1395	—ABEONA THERAPEUTICS INC	155,000	$291K	0.43%	Call
1396	CSTECAESARSTONE LTD	21,200	$291K	0.43%	Call
1397	—DANIMER SCIENTIFIC INC	7,695	$290K	0.43%
1398	VRRMVERRA MOBILITY CORP	21,400	$290K	0.43%	Put
1399	IRWDIRONWOOD PHARMACEUTICALS INC	25,900	$290K	0.43%	Call
1400	CALCALERES INC	13,300	$290K	0.43%	Call

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