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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
51 EXXON MOBIL CORP CALL 255,300 18,982,000 0.26% Call
52 CIGNA CORPORATION 139,300 18,808,000 0.26% Call
53 AVAGO TECHNOLOGIES LTD 149,100 18,639,000 0.26% Put
54 TRANSOCEAN LTD 1,416,100 18,296,000 0.25% Call
55 PFIZER INC 564,800 17,740,000 0.25% Call
56 BLOCK H & R INC 489,600 17,724,000 0.25% Put
57 VEREIT INC 2,293,100 17,703,000 0.24% Call
58 ALLERGAN PLC 64,679 17,580,000 0.24%
59 GILEAD SCIENCES INC 178,800 17,556,000 0.24% Put
60 YPF SOCIEDAD ANONIMA 1,136,200 17,304,000 0.24% Call
61 SEARS HLDGS CORP PUT 763,200 17,248,000 0.24% Put
62 PROSHARES TR 742,600 16,998,000 0.23% Put
63 ANHEUSER BUSCH INBEV SA/NV 159,400 16,947,000 0.23% Call
64 CHESAPEAKE ENERGY CORP 2,307,400 16,913,000 0.23% Put
65 TWITTER INC 626,100 16,867,000 0.23% Call
66 PPL CORP 512,300 16,850,000 0.23% Call
67 SOLARCITY CORP 393,400 16,802,000 0.23% Put
68 PENNEY J C INC 1,796,500 16,689,000 0.23% Put
69 VIPSHOP HLDGS LTD 991,000 16,649,000 0.23% Put
70 AMERICAN AIRLS GROUP INC 422,000 16,386,000 0.23% Call
71 KINDER MORGAN INC DEL 590,600 16,348,000 0.23% Put
72 Charter Communications, Inc. 91,900 16,161,000 0.22% Put
73 POWERSHS DB US DOLLAR INDEX 641,600 16,104,000 0.22% Call
74 NEWFIELD EXPL CO 488,200 16,062,000 0.22% Call
75 NXP SEMICONDUCTORS N V 183,200 15,951,000 0.22% Put
76 SEADRILL LIMITED 2,699,600 15,928,000 0.22% Put
77 BLACKBERRY LTD 2,596,490 15,916,000 0.22%
78 BRISTOL MYERS SQUIBB CO 268,400 15,889,000 0.22% Put
79 BLACKBERRY LTD 2,575,900 15,790,000 0.22% Put
80 POWERSHS DB US DOLLAR INDEX 622,200 15,617,000 0.22% Put
81 Micron Technology Inc Call Opt 07/17 23.0 1,036,600 15,528,000 0.21% Call
82 H&R Block Inc 421,285 15,251,000 0.21%
83 QIHOO 360 TECHNOLOGY CO LTD 317,986 15,209,000 0.21%
84 REALOGY HLDGS CORP 404,100 15,206,000 0.21% Call
85 HERTZ GLOBAL HOLDINGS INC 884,300 14,794,000 0.20% Call
86 STAPLES INC 1,253,400 14,702,000 0.20% Call
87 EBAY INC 591,300 14,451,000 0.20% Call
88 BARRICK GOLD CORP 2,248,800 14,302,000 0.20% Call
89 CABLEVISION SYS CORP(NEW) NY GROUP CL ACOM 436,478 14,172,000 0.20%
90 BRISTOL MYERS SQUIBB CO 239,300 14,167,000 0.20% Call
91 ALLIANCE RES PARTNER L P 636,100 14,160,000 0.20% Call
92 RESTORATION HARDWARE HLDGS I 150,600 14,052,000 0.19% Put
93 TWITTER INC 506,700 13,651,000 0.19% Put
94 MACERICH CO 176,800 13,582,000 0.19% Call
95 Call GILD $70.0 Exp Jun 16, 2017 137,000 13,452,000 0.19% Call
96 OPKO HEALTH INC 1,597,857 13,438,000 0.19%
97 21VIANET GROUP INC 733,300 13,405,000 0.19% Put
98 SOUTHWEST AIRLS CO 351,700 13,379,000 0.18% Call
99 BAKER HUGHES INC 255,800 13,312,000 0.18% Put
100 HALLIBURTON CO 372,200 13,157,000 0.18% Call
Page 2 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.