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
6501	MSBMESABI TR	1,000	$30K	0.04%	Call
6502	—SYNEOS HEALTH INC	400	$30K	0.04%	Call
6503	PRAAPRA GROUP INC	800	$30K	0.04%	Call
6504	ASNDASCENDIS PHARMA A/S	231	$30K	0.04%
6505	—ADAPTIMMUNE THERAPEUTICS PLC	5,700	$30K	0.04%	Put
6506	OOMAOOMA INC	1,892	$30K	0.04%
6507	WTWWILLIS TOWERS WATSON PLC LTD	12,700	$29K	0.04%	Call
6508	—CROSS CTRY HEALTHCARE INC	2,300	$29K	0.04%	Call
6509	—BOQII HLDG LTD	5,200	$29K	0.04%	Put
6510	—PERDOCEO ED CORP	2,400	$29K	0.04%	Put
6511	CMPSCOMPASS PATHWAYS PLC	800	$29K	0.04%	Put
6512	KROKRONOS WORLDWIDE INC	1,903	$29K	0.04%
6513	—EVOKE PHARMA INC	16,101	$29K	0.04%
6514	EVEREVERQUOTE INC	800	$29K	0.04%	Call
6515	—CAPSTEAD MTG CORP	4,590	$29K	0.04%
6516	ITWOPROSHARES TR II	4,100	$29K	0.04%	Put
6517	AHCOADAPTHEALTH CORP	800	$29K	0.04%	Put
6518	DLTHDULUTH HLDGS INC	1,700	$29K	0.04%	Call
6519	DRDDRDGOLD LIMITED	3,100	$29K	0.04%	Call
6520	—FOCUS FINL PARTNERS INC	700	$29K	0.04%	Put
6521	NTCOYNATURA &CO HLDG S A	1,700	$29K	0.04%
6522	CPSHCPS TECHNOLOGIES CORP	2,200	$29K	0.04%	Put
6523	WVEWAVE LIFE SCIENCES LTD	5,200	$29K	0.04%	Call
6524	—GORES HOLDINGS VI INC	2,100	$29K	0.04%	Put
6525	PLABPHOTRONICS INC	2,200	$28K	0.04%	Put
6526	07SSECUREWORKS CORP	2,086	$28K	0.04%
6527	—LA JOLLA PHARMACEUTICAL CO	6,632	$28K	0.04%
6528	WALWESTERN ALLIANCE BANCORP	300	$28K	0.04%	Put
6529	RKDAARCADIA BIOSCIENCES INC	10,100	$28K	0.04%	Put
6530	—NEVRO CORP	200	$28K	0.04%	Put
6531	OPYOPPENHEIMER HLDGS INC	700	$28K	0.04%	Put
6532	—AMERICAN VRTUAL CLOUD TECH I	5,000	$28K	0.04%	Put
6533	SBACSBA COMMUNICATIONS CORP NEW	100	$28K	0.04%	Call
6534	HLXHELIX ENERGY SOLUTIONS GRP I	5,600	$28K	0.04%	Put
6535	—PARAMOUNT GROUP INC	2,800	$28K	0.04%	Put
6536	2JEFOCUS FINL PARTNERS INC	663	$28K	0.04%
6537	—AUTOWEB INC	10,365	$28K	0.04%
6538	IRTINDEPENDENCE RLTY TR INC	1,824	$28K	0.04%
6539	GBDCGOLUB CAP BDC INC	1,900	$28K	0.04%	Call
6540	—CRANE CO	300	$28K	0.04%	Put
6541	—ADTRAN INC	1,700	$28K	0.04%	Call
6542	BKCCUSDBLACKROCK CAP INVT CORP	8,396	$28K	0.04%
6543	—GENOCEA BIOSCIENCES INC	10,200	$28K	0.04%	Call
6544	FANHFANHUA INC	2,000	$28K	0.04%
6545	HRTGHERITAGE INS HLDGS INC	2,500	$28K	0.04%
6546	INVAINNOVIVA INC	2,334	$28K	0.04%
6547	—OCEAN PWR TECHNOLOGIES INC	8,500	$28K	0.04%	Put
6548	—HARPOON THERAPEUTICS INC	1,345	$28K	0.04%
6549	TCPCBLACKROCK TCP CAPITAL CORP	200	$28K	0.04%	Call
6550	ASPSALTISOURCE PORTFOLIO SOLNS S	3,100	$28K	0.04%	Call
6551	TGNATEGNA INC	1,500	$28K	0.04%	Put
6552	—GORES HOLDINGS VI INC	1,943	$27K	0.04%
6553	TXTERNIUM SA	700	$27K	0.04%	Put
6554	INGRINGREDION INC	300	$27K	0.04%	Call
6555	SVASINOVAC BIOTECH LTD	412	$27K	0.04%
6556	—COOPER TIRE & RUBR CO	475	$27K	0.04%
6557	—AGILE THERAPEUTICS INC	13,046	$27K	0.04%
6558	REFRRESEARCH FRONTIERS INC	9,574	$27K	0.04%
6559	—F N B CORP	2,100	$27K	0.04%	Call
6560	KBRKBR INC	700	$27K	0.04%	Put
6561	GDYNGRID DYNAMICS HLDGS INC	1,700	$27K	0.04%	Call
6562	VCYTVERACYTE INC	504	$27K	0.04%
6563	—EIGER BIOPHARMACEUTICALS INC	3,100	$27K	0.04%	Put
6564	DCTDUCK CREEK TECHNOLOGIES INC	600	$27K	0.04%
6565	OPCHOPTION CARE HEALTH INC	1,500	$27K	0.04%	Put
6566	VGREURVECTOR GROUP LTD	1,940	$27K	0.04%
6567	—AVID TECHNOLOGY INC	1,300	$27K	0.04%	Call
6568	EKSOEUREKSO BIONICS HLDGS INC	4,316	$27K	0.04%
6569	—VECTOR GROUP LTD	1,900	$27K	0.04%	Put
6570	SGRYSURGERY PARTNERS INC	600	$27K	0.04%	Call
6571	—EPIZYME INC	3,000	$26K	0.04%	Put
6572	APAMARTISAN PARTNERS ASSET MGMT	500	$26K	0.04%	Put
6573	—LIBERTY GLOBAL PLC	1,000	$26K	0.04%	Put
6574	STCSTEWART INFORMATION SVCS COR	500	$26K	0.04%	Put
6575	RCMTRCM TECHNOLOGIES INC	7,400	$26K	0.04%	Call
6576	ABCBAMERIS BANCORP	500	$26K	0.04%	Call
6577	—CHIMERIX INC	2,700	$26K	0.04%	Call
6578	HAYNUSDHAYNES INTERNATIONAL INC	868	$26K	0.04%
6579	—AMEDISYS INC	100	$26K	0.04%	Put
6580	—QUOTIENT LTD	7,019	$26K	0.04%
6581	CCEPCOCA COLA EUROPEAN PARTNERS	500	$26K	0.04%	Put
6582	CHRDOASIS PETROLEUM INC	440	$26K	0.04%
6583	—TREEHOUSE FOODS INC	500	$26K	0.04%	Put
6584	GRFSGRIFOLS S A	1,500	$26K	0.04%	Put
6585	RYAAYRYANAIR HOLDINGS PLC	227	$26K	0.04%
6586	9KGNEXTIER OILFIELD SOLUTIONS	6,898	$26K	0.04%
6587	1T7TRICIDA INC	4,965	$26K	0.04%
6588	SIEBSIEBERT FINL CORP	6,500	$26K	0.04%	Call
6589	—LABORATORY CORP AMER HLDGS	100	$26K	0.04%	Put
6590	—TILLYS INC	2,300	$26K	0.04%	Put
6591	—DOMTAR CORP	700	$26K	0.04%	Call
6592	—TITAN PHARMACEUTICALS INC DE	8,700	$26K	0.04%	Call
6593	VRTVERTIV HOLDINGS CO	1,300	$26K	0.04%	Put
6594	—BLUEKNIGHT ENERGY PARTNERS L	8,000	$26K	0.04%	Put
6595	WCCWESCO INTL INC	300	$26K	0.04%	Put
6596	VTEBVANGUARD TAX-MANAGED INTL FD	500	$25K	0.04%	Put
6597	—UNITED STS GASOLINE FD LP	800	$25K	0.04%	Put
6598	SCOR1EURCOMSCORE INC	6,774	$25K	0.04%
6599	—ADITX THERAPEUTICS INC	9,900	$25K	0.04%	Call
6600	KLICKULICKE & SOFFA INDS INC	500	$25K	0.04%	Put

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