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Institutional Investment Manager
GROUP ONE TRADING LLC
GROUP ONE TRADING LLC (CIK: 0000932540) incorporated in Delaware, located at 425 S Financial Place, Chicago, IL. Institutional holdings reported to the SEC.

Institutional Holdings (2015Q4)
Portfolio Summary: 4,723 holdings with a total value of $8,460,518,000.
#
Name
Shares
Value ($)
%
Options
Notes
101 POWERSHS DB US DOLLAR INDEX 540,500 13,864,000 0.16% Call
102 MONDELEZ INTL INC 303,269 13,599,000 0.16%
103 TYSON FOODS INC 253,700 13,530,000 0.16% Call
104 CHICAGO BRIDGE & IRON CO N V 346,000 13,491,000 0.16% Call
105 MBIA INC 2,073,200 13,434,000 0.16% Put
106 HERBALIFE LTD 249,200 13,362,000 0.16% Call
107 OFFICE DEPOT INC 2,348,600 13,246,000 0.16% Call
108 CATERPILLAR INC DEL PUT 194,400 13,211,000 0.16% Put
109 InterOil Corp 419,685 13,187,000 0.16%
110 MCDONALDS CORP 111,600 13,184,000 0.16% Put
111 ALIBABA GROUP HLDG LTD 161,600 13,133,000 0.16% Put
112 LUMBER LIQUIDATORS HLDGS INC 755,600 13,117,000 0.16% Put
113 YPF SOCIEDAD ANONIMA 829,100 13,033,000 0.15% Call
114 TEVA PHARMACEUTICAL INDS LTD 196,740 12,914,000 0.15%
115 CIGNA CORPORATION 88,200 12,906,000 0.15% Call
116 HCP INC 335,900 12,845,000 0.15% Put
117 DELTA AIR LINES INC DEL 252,600 12,804,000 0.15% Put
118 ACADIA PHARMACEUTICALS INC 357,900 12,759,000 0.15% Call
119 TYSON FOODS INC 237,900 12,687,000 0.15% Put
120 VEREIT INC 1,599,100 12,665,000 0.15% Call
121 BAKER HUGHES INC 273,200 12,608,000 0.15% Put
122 VIPSHOP HLDGS LTD 821,700 12,547,000 0.15% Put
123 REALOGY HLDGS CORP 338,800 12,424,000 0.15% Call
124 PANDORA MEDIA INC 922,300 12,368,000 0.15% Put
125 MCDONALDS CORP 103,000 12,168,000 0.14% Call
126 PROSHARES TR 684,800 12,135,000 0.14% Put
127 ENERGY TRANSFER PRTNRS L P 358,000 12,075,000 0.14% Call
128 SOUTHWEST AIRLS CO 280,400 12,074,000 0.14% Call
129 KINDER MORGAN INC DEL 803,607 11,990,000 0.14%
130 PFIZER INC 367,200 11,853,000 0.14% Call
131 COMERICA INC 282,600 11,821,000 0.14% Call
132 TWITTER INC 507,337 11,740,000 0.14%
133 NXP SEMICONDUCTORS N V 138,900 11,702,000 0.14% Put
134 SEARS HLDGS CORP 564,100 11,598,000 0.14% Call
135 PERRIGO CO PLC 79,900 11,562,000 0.14% Put
136 BIOMARIN PHARMACEUTICAL INC 110,300 11,555,000 0.14% Put
137 SAREPTA THERAPEUTICS INC 298,111 11,501,000 0.14%
138 FREEPORT-MCMORAN INC 1,689,900 11,441,000 0.14% Put
139 MARKET VECTORS ETF TR GOLD MINER ETF 831,400 11,407,000 0.13% Put
140 YAHOO INC 340,000 11,308,000 0.13% Call
141 SALESFORCE COM INC 143,700 11,266,000 0.13% Call
142 JOY GLOBAL INC 890,900 11,234,000 0.13% Put
143 ARMOUR RESIDENTIAL REIT INC 515,600 11,219,000 0.13% Put
144 CHEVRON CORP NEW 122,200 10,993,000 0.13% Put
145 ILLUMINA INC 57,000 10,941,000 0.13% Call
146 NEWFIELD EXPL CO 334,400 10,888,000 0.13% Call
147 YPF SOCIEDAD ANONIMA 691,700 10,874,000 0.13% Put
148 MONSTER BEVERAGE CORP NEW 72,400 10,785,000 0.13% Call
149 UNITED STATES OIL FUND LP 980,300 10,783,000 0.13% Call
150 QUNAR CAYMAN IS LTD 204,300 10,775,000 0.13% Call
Page 3 of 95

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0000932540-16-000018, filed 2016.02.11).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.