GROUP ONE TRADING LLC Q4 2018 Filing

Filed February 6, 2019

Portfolio Value

$11.5M

Holdings

4,844

Report Date

Q4 2018

Filing Type

13F-HR

All Holdings (4,844 positions)

#	Stock	Shares	Value	% Portfolio	Type
1601	—PERFICIENT INC	5,000	$111K	0.96%	Call
1602	—NEOS THERAPEUTICS INC	66,724	$110K	0.95%
1603	TTS1EURTILE SHOP HLDGS INC	20,073	$110K	0.95%
1604	ETNEATON CORP PLC	1,600	$110K	0.95%	Put
1605	CRSCARPENTER TECHNOLOGY CORP	3,100	$110K	0.95%	Put
1606	—COOPER TIRE & RUBR CO	3,367	$109K	0.94%
1607	TUSKMAMMOTH ENERGY SVCS INC	6,037	$109K	0.94%
1608	—U S G CORP	2,562	$109K	0.94%
1609	—NXSTAGE MEDICAL INC	3,800	$109K	0.94%	Put
1610	VSHVISHAY INTERTECHNOLOGY INC	6,041	$109K	0.94%
1611	—ENVIVA PARTNERS LP	3,900	$108K	0.94%	Put
1612	—ARQULE INC	38,833	$108K	0.94%
1613	TSTENARIS S A	5,071	$108K	0.94%
1614	VTE1ASURE SOFTWARE INC	21,316	$108K	0.94%
1615	—CONATUS PHARMACEUTICALS INC	62,700	$108K	0.94%	Put
1616	—SIEBERT FINL CORP	7,500	$108K	0.94%	Put
1617	ORMPORAMED PHARM INC	36,000	$108K	0.94%	Call
1618	—CNH INDL N V	11,600	$107K	0.93%	Call
1619	—CIT GROUP INC	2,800	$107K	0.93%	Put
1620	—WELBILT INC	9,600	$107K	0.93%	Call
1621	—BOINGO WIRELESS INC	5,200	$107K	0.93%	Put
1622	—BLUE APRON HLDGS INC	104,000	$106K	0.92%	Put
1623	NUANEURNUANCE COMMUNICATIONS INC	8,044	$106K	0.92%
1624	—CENTERSTATE BK CORP	5,000	$105K	0.91%	Call
1625	—QUOTIENT LTD	17,000	$104K	0.90%	Put
1626	—LAUDER ESTEE COS INC	800	$104K	0.90%	Put
1627	USFDUS FOODS HLDG CORP	3,300	$104K	0.90%	Call
1628	ORCLORACLE CORP	2,300	$104K	0.90%	Put
1629	—ON DECK CAP INC	17,600	$104K	0.90%	Call
1630	—FS KKR CAPITAL CORP	19,900	$103K	0.89%	Put
1631	—GLOBAL PMTS INC	1,000	$103K	0.89%	Put
1632	ANETEURARISTA NETWORKS INC	491	$103K	0.89%
1633	—QUIDEL CORP	2,100	$103K	0.89%	Put
1634	—22ND CENTY GROUP INC	41,500	$103K	0.89%	Put
1635	CYTKCYTOKINETICS INC	16,200	$102K	0.88%	Call
1636	—UNITED NAT FOODS INC	9,600	$102K	0.88%	Call
1637	—LIBERTY EXPEDIA HOLDINGS	2,600	$102K	0.88%	Call
1638	VYXNCR CORP NEW	4,400	$102K	0.88%	Put
1639	—SYNERGY PHARMACEUTICALS DEL	899,300	$102K	0.88%	Call
1640	—RESOLUTE FST PRODS INC	12,800	$102K	0.88%	Call
1641	LSCCLATTICE SEMICONDUCTOR CORP	14,630	$101K	0.88%
1642	—FANG HLDGS LTD	70,400	$101K	0.88%	Put
1643	—CORMEDIX INC	78,135	$101K	0.88%
1644	—NEVSUN RES LTD	22,946	$101K	0.88%
1645	PGPROCTER AND GAMBLE CO	1,100	$101K	0.88%	Put
1646	CHRWC H ROBINSON WORLDWIDE INC	1,200	$101K	0.88%	Put
1647	—CORREVIO PHARMA CORP	40,000	$100K	0.87%	Put
1648	KODKEASTMAN KODAK CO	39,400	$100K	0.87%	Call
1649	ASGNASGN INC	1,836	$100K	0.87%
1650	—CELSION CORPORATION	70,900	$100K	0.87%	Put
1651	DRIDARDEN RESTAURANTS INC	1,000	$100K	0.87%	Call
1652	SANBANCO SANTANDER SA	22,110	$99K	0.86%
1653	SSYSSTRATASYS LTD	5,494	$99K	0.86%
1654	FATEFATE THERAPEUTICS INC	7,725	$99K	0.86%
1655	—JACOBS ENGR GROUP INC DEL	1,700	$99K	0.86%	Call
1656	—GASLOG PARTNERS LP	5,000	$99K	0.86%	Put
1657	QDELUSDQUIDEL CORP	2,029	$99K	0.86%
1658	TIFEURTIFFANY & CO NEW	1,231	$99K	0.86%
1659	—NEW GOLD INC CDA	131,000	$99K	0.86%	Put
1660	—QEP RES INC	17,400	$98K	0.85%	Call
1661	—CALLAWAY GOLF CO	6,400	$98K	0.85%	Call
1662	FSICUSDFS KKR CAPITAL CORP	19,000	$98K	0.85%
1663	—DESPEGAR COM CORP	7,900	$98K	0.85%	Put
1664	—NORTHWEST PIPE CO	4,200	$98K	0.85%	Put
1665	—PETROCHINA CO LTD	1,600	$98K	0.85%	Put
1666	—CENTENNIAL RESOURCE DEV INC	8,900	$98K	0.85%	Put
1667	—COLUMBIA FINL INC	6,400	$98K	0.85%	Call
1668	—MACOM TECH SOLUTIONS HLDGS I	6,700	$97K	0.84%	Call
1669	SONYSONY CORP	2,000	$97K	0.84%	Put
1670	—PACIFIC COAST OIL TR	59,028	$97K	0.84%
1671	—EXPRESS INC	18,900	$97K	0.84%	Put
1672	—CHEETAH MOBILE INC	15,900	$97K	0.84%	Call
1673	VLYVALLEY NATL BANCORP	10,976	$97K	0.84%
1674	—COMPANHIA SIDERURGICA NACION	44,100	$97K	0.84%	Call
1675	TUPTUPPERWARE BRANDS CORP	3,088	$97K	0.84%
1676	KNKNOWLES CORP	7,300	$97K	0.84%	Put
1677	—T2 BIOSYSTEMS INC	32,200	$97K	0.84%	Put
1678	SHOPSHOPIFY INC	690	$96K	0.83%
1679	CMBTEURONAV NV ANTWERPEN	13,792	$96K	0.83%
1680	RDIREADING INTERNATIONAL INC	6,600	$96K	0.83%	Call
1681	—AFFIMED N V	30,900	$96K	0.83%	Put
1682	MEDMEDIFAST INC	766	$96K	0.83%
1683	—SANCHEZ ENERGY CORP	353,700	$96K	0.83%	Call
1684	—GCP APPLIED TECHNOLOGIES INC	3,900	$96K	0.83%	Call
1685	—MID AMER APT CMNTYS INC	1,000	$96K	0.83%	Put
1686	RDNRADIAN GROUP INC	5,834	$95K	0.82%
1687	FLEXFLEX LTD	12,500	$95K	0.82%	Put
1688	—ANTARES PHARMA INC	35,046	$95K	0.82%
1689	—TUPPERWARE BRANDS CORP	3,000	$95K	0.82%	Call
1690	CMBTEURONAV NV ANTWERPEN	13,700	$95K	0.82%	Put
1691	GAPGAP INC DEL	3,690	$95K	0.82%
1692	SSPSCRIPPS E W CO OHIO	5,994	$94K	0.81%
1693	—VIRNETX HLDG CORP	39,100	$94K	0.81%	Call
1694	FHIFEDERATED INVS INC PA	3,522	$94K	0.81%
1695	—GATES INDUSTRIAL CORPRATIN P	7,100	$94K	0.81%	Call
1696	BTUPEABODY ENERGY CORP NEW	3,100	$94K	0.81%	Call
1697	TTMITTM TECHNOLOGIES INC	9,658	$94K	0.81%
1698	KRNTKORNIT DIGITAL LTD	5,000	$94K	0.81%	Call
1699	KRNTKORNIT DIGITAL LTD	5,000	$94K	0.81%	Put
1700	BLMNBLOOMIN BRANDS INC	5,200	$93K	0.81%	Put

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