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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 (2015Q3)
Portfolio Summary: 4,860 holdings with a total value of $7,233,730,000.
#
Name
Shares
Value ($)
%
Options
Notes
151 RITE AID CORP 1,654,200 10,041,000 0.14% Put
152 ILLUMINA INC 56,700 9,969,000 0.14% Call
153 VODAFONE GROUP PLC NEW 313,700 9,957,000 0.14% Put
154 VIMICRO INTL CORP 789,800 9,841,000 0.14% Put
155 HERON THERAPEUTICS INC 403,300 9,841,000 0.14% Call
156 SAREPTA THERAPEUTICS INC 304,614 9,781,000 0.14%
157 AVAGO TECHNOLOGIES LTD 77,600 9,701,000 0.13% Call
158 BANCO SANTANDER SA 1,813,575 9,576,000 0.13%
159 21VIANET GROUP INC 520,863 9,521,000 0.13%
160 BIOMARIN PHARMACEUTICAL INC 90,300 9,510,000 0.13% Call
161 ENERGY TRANSFER EQUITY L P 455,400 9,477,000 0.13% Put
162 ANHEUSER BUSCH INBEV SA/NV 89,000 9,462,000 0.13% Put
163 MONDELEZ INTL INC 225,903 9,459,000 0.13%
164 RAPTOR PHARMACEUTICAL CORP 1,555,500 9,411,000 0.13% Put
165 HERTZ GLOBAL HOLDINGS INC 562,200 9,406,000 0.13% Put
166 ALTERA CORP 187,100 9,370,000 0.13% Call
167 RITE AID CORP 1,542,019 9,360,000 0.13%
168 POWERSHS DB US DOLLAR INDEX 372,141 9,341,000 0.13%
169 VULCAN MATLS CO 104,300 9,304,000 0.13% Call
170 COCA COLA ENTERPRISES INC NE 190,100 9,191,000 0.13% Call
171 HOLOGIC INC 234,700 9,184,000 0.13% Call
172 STAPLES INC 782,900 9,183,000 0.13% Put
173 GOPRO INC 293,400 9,160,000 0.13% Call
174 FRANCO NEVADA CORP 207,900 9,152,000 0.13% Put
175 TEVA PHARMACEUTICAL INDS LTD 161,928 9,142,000 0.13%
176 HORIZON PHARMA PLC 459,000 9,097,000 0.13% Call
177 HALLIBURTON CO 254,300 8,990,000 0.12% Put
178 HCP INC 239,500 8,921,000 0.12% Put
179 CLOVIS ONCOLOGY INC 95,900 8,819,000 0.12% Put
180 ENTERPRISE PRODS PARTNERS L 352,700 8,782,000 0.12% Call
181 GENERAL MTRS CO 288,500 8,661,000 0.12% Call
182 ARMOUR RESIDENTIAL REIT INC 431,300 8,643,000 0.12% Put
183 HERON THERAPEUTICS INC 352,700 8,606,000 0.12% Put
184 CONAGRA BRANDS INC 212,300 8,600,000 0.12% Call
185 VALE S A 2,040,600 8,571,000 0.12% Call
186 RANGE RES CORP 266,100 8,547,000 0.12% Call
187 VIMICRO INTL CORP 679,672 8,469,000 0.12%
188 NXP SEMICONDUCTORS N V 97,100 8,455,000 0.12% Call
189 KROGER CO 234,100 8,444,000 0.12% Put
190 WASTE MGMT INC DEL 167,800 8,358,000 0.12% Call
191 ENSCO PLC 589,200 8,296,000 0.11% Put
192 TASER INTL INC 376,600 8,295,000 0.11% Call
193 COBALT INTL ENERGY INC 1,169,900 8,283,000 0.11% Put
194 UNITED STATES STL CORP NEW 788,300 8,214,000 0.11% Put
195 KING DIGITAL ENTMT PLC 598,400 8,102,000 0.11% Call
196 FREEPORT-MCMORAN INC 835,500 8,096,000 0.11% Put
197 PFIZER INC 255,600 8,028,000 0.11% Put
198 JD COM INC 307,999 8,026,000 0.11%
199 PINNACLE ENTMT INC 236,400 8,000,000 0.11% Call
200 LENDINGCLUB CORP 604,300 7,995,000 0.11% Put
Page 4 of 98

Portfolio data is normalized using SEC Form 13F filings, including the Restatement filing (0000932540-15-000015, filed 2015.11.20).

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.