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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
151 MICRON TECHNOLOGY INC 758,500 10,740,000 0.13% Put
152 ENERGY TRANSFER EQUITY L P 774,300 10,639,000 0.13% Call
153 BARRICK GOLD CORP 1,440,100 10,628,000 0.13% Call
154 BARCLAYS BK PLC 527,300 10,620,000 0.13% Call
155 NXP SEMICONDUCTORS N V 125,900 10,607,000 0.13% Call
156 BARRICK GOLD CORP 1,435,600 10,595,000 0.13% Put
157 PATTERSON UTI ENERGY INC 700,500 10,564,000 0.12% Call
158 CHESAPEAKE ENERGY CORP 2,337,400 10,518,000 0.12% Put
159 LILLY ELI & CO 124,600 10,499,000 0.12% Call
160 MANNKIND CORP 7,224,500 10,476,000 0.12% Call
161 ARCH COAL INC 10,612,200 10,470,000 0.12% Call
162 FIDELITY NATIONAL FINANCIAL 301,600 10,456,000 0.12% Put
163 ENERGY TRANSFER EQUITY L P 308,900 10,419,000 0.12% Put
164 BANCO SANTANDER SA 2,135,300 10,399,000 0.12% Put
165 HCA HOLDINGS INC 153,700 10,395,000 0.12% Put
166 HALLIBURTON CO 303,300 10,324,000 0.12% Call
167 CONSOL ENERGY INC 1,268,600 10,022,000 0.12% Put
168 HALLIBURTON CO 293,900 10,004,000 0.12% Put
169 RITE AID CORP 1,275,900 10,003,000 0.12% Call
170 CELGENE CORP 83,100 9,952,000 0.12% Put
171 ADVANCED MICRO DEVICES INC 3,448,200 9,896,000 0.12% Put
172 TAIWAN SEMICONDUCTOR MFG LTD 431,700 9,821,000 0.12% Put
173 Alcoa Inc 993,586 9,807,000 0.12%
174 EVERSOURCE ENERGY 191,500 9,780,000 0.12% Call
175 GENERAL MTRS CO 283,800 9,652,000 0.11% Call
176 IONIS PHARMACEUTICALS INC 154,500 9,568,000 0.11% Put
177 FREEPORT-MCMORAN INC 1,411,500 9,556,000 0.11% Call
178 YY INC 152,600 9,533,000 0.11% Put
179 BARRICK GOLD CORP 1,288,030 9,506,000 0.11%
180 WILLIAMS COS INC DEL 369,650 9,500,000 0.11%
181 UNITED STATES NATL GAS FUND 1,090,800 9,457,000 0.11% Put
182 BROOKDALE SR LIVING INC 511,600 9,444,000 0.11% Call
183 AVAGO TECHNOLOGIES LTD SHS 64,933 9,425,000 0.11%
184 VERIZON COMMUNICATIONS INC 202,600 9,364,000 0.11% Call
185 SAREPTA THERAPEUTICS INC 238,900 9,217,000 0.11% Put
186 MANNKIND CORP 6,356,800 9,217,000 0.11% Put
187 OFFICE DEPOT INC 1,618,241 9,127,000 0.11%
188 CTRIP COM INTL LTD 197,000 9,127,000 0.11% Put
189 BANCO SANTANDER SA 1,863,901 9,077,000 0.11%
190 GILEAD SCIENCES INC 88,994 9,005,000 0.11%
191 KRAFT HEINZ CO 123,200 8,964,000 0.11% Put
192 COCA COLA ENTERPRISES INC NE 179,000 8,814,000 0.10% Call
193 ANHEUSER BUSCH INBEV SA/NV 70,400 8,800,000 0.10% Call
194 E M C CORP MASS 340,800 8,752,000 0.10% Put
195 STAPLES INC 924,100 8,751,000 0.10% Call
196 CABLEVISION SYS CORP 272,700 8,699,000 0.10% Put
197 RANGE RES CORP 352,200 8,668,000 0.10% Call
198 CALATLANTIC GROUP INC 228,500 8,665,000 0.10% Call
199 APACHE CORP 193,800 8,618,000 0.10% Call
200 DANAHER CORP DEL 92,400 8,582,000 0.10% Put
Page 4 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.