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
3101	DIODDIODES INC	12,900	$1.0M	1.53%	Put
3102	—BP MIDSTREAM PARTNERS LP	81,300	$1.0M	1.52%	Call
3103	—FTAC OLYMPUS ACQUISITION COR	97,300	$1.0M	1.52%	Put
3104	—NAVIOS MARITIME HOLDINGS INC	117,300	$1.0M	1.52%	Put
3105	—FALCON CAPITAL ACQUISITN COR	103,000	$1.0M	1.52%	Put
3106	ELFE L F BEAUTY INC	38,295	$1.0M	1.52%
3107	BKRBAKER HUGHES COMPANY	47,500	$1.0M	1.52%	Call
3108	DMLDENISON MINES CORP	940,836	$1.0M	1.52%
3109	OMCOMNICOM GROUP INC	13,830	$1.0M	1.52%
3110	—CARA THERAPEUTICS INC	47,100	$1.0M	1.52%	Call
3111	APPNAPPIAN CORP	7,684	$1.0M	1.51%
3112	—THE ODP CORP	23,600	$1.0M	1.51%	Call
3113	—STARBOARD VALUE ACQUISITN CO	102,900	$1.0M	1.51%	Put
3114	ADNTADIENT PLC	23,100	$1.0M	1.51%	Put
3115	PAYSPAYSIGN INC	233,500	$1.0M	1.51%	Call
3116	HPPHUDSON PAC PPTYS INC	37,600	$1.0M	1.51%	Call
3117	BSMBLACK STONE MINERALS L P	117,000	$1.0M	1.51%	Call
3118	KOPNKOPIN CORP	97,100	$1.0M	1.51%
3119	GNWGENWORTH FINL INC	306,886	$1.0M	1.51%
3120	—TEAM INC	88,412	$1.0M	1.51%
3121	SWKSTANLEY BLACK & DECKER INC	5,100	$1.0M	1.51%	Put
3122	YUMCYUM CHINA HLDGS INC	17,200	$1.0M	1.51%	Call
3123	MURMURPHY OIL CORP	62,030	$1.0M	1.51%
3124	—BLACKSTONE MTG TR INC	32,800	$1.0M	1.51%	Put
3125	PWRQUANTA SVCS INC	11,555	$1.0M	1.51%
3126	CTSHCOGNIZANT TECHNOLOGY SOLUTIO	13,000	$1.0M	1.50%	Put
3127	PLANUSDANAPLAN INC	18,874	$1.0M	1.50%
3128	—EASTERLY GOVT PPTYS INC	4,900	$1.0M	1.50%	Put
3129	—180 DEGREE CAP CORP	137,700	$1.0M	1.50%	Call
3130	LODECOMSTOCK MNG INC	221,500	$1.0M	1.50%	Put
3131	—LHC GROUP INC	5,300	$1.0M	1.50%	Call
3132	—COLONY CAP INC NEW	156,397	$1.0M	1.50%
3133	MBIMBIA INC	105,200	$1.0M	1.50%	Call
3134	GDGENERAL DYNAMICS CORP	5,566	$1.0M	1.50%
3135	—RUBIUS THERAPEUTICS INC	38,100	$1.0M	1.50%	Put
3136	OCULOCULAR THERAPEUTIX INC	61,500	$1.0M	1.49%	Put
3137	NCNO*NCINO INC	15,088	$1.0M	1.49%
3138	—NAM TAI PPTY INC	81,634	$1.0M	1.49%
3139	MCRBSERES THERAPEUTICS INC	48,800	$1.0M	1.49%	Put
3140	—ACCELERON PHARMA INC	7,400	$1.0M	1.49%	Put
3141	—BLUE APRON HLDGS INC	159,000	$1.0M	1.49%	Call
3142	—TUSCAN HLDGS CORP II	99,400	$1.0M	1.49%	Put
3143	PNFPPINNACLE FINL PARTNERS INC	11,300	$1.0M	1.48%	Call
3144	—ZYNERBA PHARMACEUTICALS INC	215,300	$1.0M	1.48%	Call
3145	JEFJEFFERIES FINL GROUP INC	33,157	$998K	1.48%
3146	CXCEMEX SAB DE CV	142,977	$997K	1.48%
3147	—MOBILE TELESYSTEMS PJSC	119,500	$997K	1.48%	Call
3148	AMHAMERICAN HOMES 4 RENT	29,800	$994K	1.47%	Put
3149	—CHEMOCENTRYX INC	19,400	$994K	1.47%	Put
3150	CRONCRONOS GROUP INC	104,922	$993K	1.47%
3151	DBDEURDIEBOLD INC	70,189	$992K	1.47%
3152	—DURECT CORP	501,100	$992K	1.47%	Call
3153	—SHIFT4 PMTS INC	12,100	$992K	1.47%	Put
3154	BWABORGWARNER INC	21,400	$992K	1.47%	Put
3155	AGIOAGIOS PHARMACEUTICALS INC	19,200	$991K	1.47%	Call
3156	—MULTIPLAN CORPORATION	178,300	$990K	1.47%	Put
3157	ELANELANCO ANIMAL HEALTH INC	33,608	$990K	1.47%
3158	—TRITON INTL LTD	18,000	$990K	1.47%	Put
3159	ILPTINDUSTRIAL LOGISTICS PPTYS T	42,800	$990K	1.47%	Call
3160	ZIONZIONS BANCORPORATION N A	18,000	$989K	1.46%	Call
3161	CNDTCONDUENT INC	148,301	$988K	1.46%
3162	—YATSEN HLDG LTD	79,900	$987K	1.46%	Put
3163	—GX ACQUISITION CORP	97,891	$987K	1.46%
3164	RBBNRIBBON COMMUNICATIONS INC	120,064	$986K	1.46%
3165	CSGPCOSTAR GROUP INC	1,200	$986K	1.46%	Put
3166	—MESA AIR GROUP INC	73,200	$985K	1.46%	Call
3167	MCOMOODYS CORP	3,300	$985K	1.46%	Put
3168	NATNORDIC AMERICAN TANKERS LIMI	302,400	$983K	1.46%	Put
3169	ICLRICON PLC	5,000	$982K	1.45%	Put
3170	EQHEQUITABLE HLDGS INC	30,100	$982K	1.45%	Call
3171	CLGXCORELOGIC INC	12,390	$982K	1.45%
3172	—PROOFPOINT INC	7,800	$981K	1.45%	Put
3173	—SAGE THERAPEUTICS INC	13,100	$981K	1.45%	Call
3174	LEGLEGGETT & PLATT INC	21,500	$981K	1.45%	Put
3175	GSMFERROGLOBE PLC	259,100	$979K	1.45%	Put
3176	MRKRMARKER THERAPEUTICS INC	437,100	$979K	1.45%	Call
3177	—NORTHERN STAR ACQUISITION CO	88,000	$979K	1.45%	Put
3178	CPRTCOPART INC	9,002	$978K	1.45%
3179	CHDCHURCH & DWIGHT INC	11,200	$978K	1.45%	Call
3180	—TURQUOISE HILL RES LTD	60,700	$977K	1.45%	Put
3181	—ENABLE MIDSTREAM PARTNERS LP	150,400	$975K	1.44%	Call
3182	—THE ODP CORP	22,500	$974K	1.44%	Put
3183	—CO-DIAGNOSTICS INC	102,000	$973K	1.44%	Put
3184	CNDTCONDUENT INC	146,100	$973K	1.44%	Put
3185	—NEXTGEN ACQUISITION CORP	97,911	$971K	1.44%
3186	FROFRONTLINE LTD	135,800	$971K	1.44%	Call
3187	CDNSCADENCE DESIGN SYSTEM INC	7,072	$969K	1.44%
3188	OVVOVINTIV INC	40,619	$968K	1.43%
3189	CRKCOMSTOCK RES INC	174,700	$968K	1.43%	Put
3190	XPELXPEL INC	18,600	$966K	1.43%	Call
3191	BALLBALL CORP	11,400	$966K	1.43%	Put
3192	SWN1EURSOUTHWESTERN ENERGY CO	207,504	$965K	1.43%
3193	LYBLYONDELLBASELL INDUSTRIES N	9,266	$964K	1.43%
3194	—U S SILICA HLDGS INC	78,400	$964K	1.43%	Call
3195	ICHRICHOR HOLDINGS	17,900	$963K	1.43%	Call
3196	SIGSIGNET JEWELERS LIMITED	16,600	$962K	1.42%	Put
3197	THCTENET HEALTHCARE CORP	18,500	$962K	1.42%	Put
3198	N1KNEWAGE INC	336,107	$961K	1.42%
3199	CMPSCOMPASS PATHWAYS PLC	26,100	$961K	1.42%	Call
3200	—TRINITY INDS INC	33,700	$960K	1.42%	Call

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