Dark
Light
System
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
101 ALTERA CORP 256,700 12,856,000 0.18% Put
102 SAREPTA THERAPEUTICS INC 399,200 12,818,000 0.18% Put
103 CABLEVISION SYS CORP 393,600 12,780,000 0.18% Call
104 OCWEN FINL CORP 1,903,801 12,775,000 0.18%
105 CABLEVISION SYS CORP 392,200 12,735,000 0.18% Put
106 SUNEDISON INC 1,772,400 12,726,000 0.18% Put
107 MYLAN N V 315,097 12,686,000 0.18%
108 DISNEY WALT CO 124,000 12,673,000 0.18% Put
109 CHICAGO BRIDGE & IRON CO N V 317,700 12,600,000 0.17% Call
110 ADVANCED MICRO DEVICES INC 7,266,000 12,498,000 0.17% Put
111 NETFLIX INC 119,100 12,298,000 0.17% Put
112 JETBLUE AIRWAYS CORP 475,600 12,256,000 0.17% Call
113 BAKER HUGHES INC 234,800 12,219,000 0.17% Call
114 HCA HOLDINGS INC 153,300 11,859,000 0.16% Put
115 BAXTER INTL INC 360,100 11,829,000 0.16% Call
116 BANCO SANTANDER SA 2,195,300 11,591,000 0.16% Put
117 OPKO HEALTH INC 1,377,000 11,581,000 0.16% Call
118 UNITED STATES OIL FUND LP 787,100 11,555,000 0.16% Call
119 FITBIT INC 304,800 11,488,000 0.16% Call
120 ZOGENIX INC 849,300 11,466,000 0.16% Call
121 SPECTRA ENERGY CORP 436,400 11,464,000 0.16% Call
122 TAIWAN SEMICONDUCTOR MFG LTD 550,300 11,419,000 0.16% Put
123 YY INC 204,100 11,132,000 0.15% Put
124 SEARS HLDGS CORP 491,500 11,108,000 0.15% Call
125 EVERSOURCE ENERGY 216,400 10,954,000 0.15% Call
126 CHEVRON CORP NEW 138,500 10,925,000 0.15% Call
127 WISDOMTREE INVTS INC 676,100 10,905,000 0.15% Put
128 VERIZON COMMUNICATIONS INC 249,500 10,856,000 0.15% Call
129 UNITED STATES OIL FUND LP 739,100 10,850,000 0.15% Put
130 SOLARCITY CORP 252,100 10,767,000 0.15% Call
131 ENERGY TRANSFER PRTNRS L P 261,800 10,752,000 0.15% Call
132 CIGNA CORPORATION 79,600 10,748,000 0.15% Put
133 OFFICE DEPOT INC 1,664,600 10,687,000 0.15% Put
134 VALE S A 2,536,600 10,654,000 0.15% Put
135 DEUTSCHE BANK AG 393,600 10,611,000 0.15% Put
136 LILLY ELI & CO 125,900 10,537,000 0.15% Call
137 FREEPORT-MCMORAN INC 1,081,300 10,478,000 0.14% Call
138 ISIS PHARMACEUTICALS INC 258,800 10,461,000 0.14% Put
139 BROOKDALE SR LIVING INC 454,500 10,435,000 0.14% Call
140 SAREPTA THERAPEUTICS INC 324,900 10,433,000 0.14% Call
141 PANDORA MEDIA INC 487,200 10,397,000 0.14% Call
142 CONNS INC 431,700 10,378,000 0.14% Put
143 STAPLES INC 879,032 10,311,000 0.14%
144 MBIA INC 1,690,500 10,278,000 0.14% Put
145 ZOETIS INC 248,400 10,229,000 0.14% Put
146 CHEVRON CORP NEW 129,300 10,199,000 0.14% Put
147 ENERGY TRANSFER EQUITY L P 487,700 10,149,000 0.14% Call
148 InterOil Corp 300,141 10,118,000 0.14%
149 BARRICK GOLD CORP 1,589,400 10,109,000 0.14% Put
150 SOUFUN HLDGS LTD 1,523,100 10,052,000 0.14% Put
Page 3 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.