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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 (2015Q2)
Portfolio Summary: 4,849 holdings with a total value of $7,147,569,000.
#
Name
Shares
Value ($)
%
Options
Notes
51 WISDOMTREE INVTS INC 980,400 21,534,000 0.30% Put
52 ABBVIE INC 312,317 20,985,000 0.29%
53 RAPTOR PHARMACEUTICAL CORP 1,319,766 20,839,000 0.29%
54 GOPRO INC 389,200 20,519,000 0.29% Put
55 Mobileye Nv Call Opt 09/17 48.0 373,700 19,870,000 0.28% Call
56 HUMANA INC 102,700 19,644,000 0.27% Call
57 TWITTER INC 514,400 18,632,000 0.26% Call
58 OPKO HEALTH INC 1,148,600 18,469,000 0.26% Put
59 ENERGY TRANSFER PRTNRS L P 349,600 18,249,000 0.26% Call
60 YPF SOCIEDAD ANONIMA 665,000 18,241,000 0.26% Put
61 ALTERA CORP 355,700 18,212,000 0.25% Put
62 LUMBER LIQUIDATORS HLDGS INC 879,100 18,206,000 0.25% Put
63 UNITED STATES OIL FUND LP 893,800 17,769,000 0.25% Call
64 Call GILD $70.0 Exp Jun 16, 2017 151,600 17,749,000 0.25% Call
65 ENERGY TRANSFER EQUITY L P 273,300 17,538,000 0.25% Call
66 SEARS HLDGS CORP PUT 648,800 17,323,000 0.24% Put
67 SUNEDISON INC 577,300 17,267,000 0.24% Call
68 CIGNA CORPORATION 103,700 16,799,000 0.24% Call
69 BANCO SANTANDER SA 2,360,400 16,546,000 0.23% Put
70 HUMANA INC 85,300 16,316,000 0.23% Put
71 OCWEN FINL CORP 1,598,202 16,302,000 0.23%
72 ALLERGAN PLC 52,748 16,007,000 0.22%
73 TARGA RES CORP 178,400 15,917,000 0.22% Call
74 AMERICAN AIRLS GROUP INC 397,000 15,854,000 0.22% Call
75 BIOMARIN PHARMACEUTICAL INC 115,900 15,853,000 0.22% Call
76 BARCLAYS BK PLC 765,200 15,381,000 0.22% Call
77 ALIBABA GROUP HLDG LTD 186,800 15,368,000 0.22% Call
78 PENNEY J C INC 1,777,400 15,055,000 0.21% Put
79 LUMBER LIQUIDATORS HLDGS INC 726,800 15,052,000 0.21% Call
80 SOLARCITY CORP 276,300 14,796,000 0.21% Call
81 KINDER MORGAN INC DEL 381,800 14,657,000 0.21% Put
82 RITE AID CORP 1,755,200 14,656,000 0.21% Call
83 VALE S A 2,472,400 14,562,000 0.20% Put
84 YELP INC 335,100 14,419,000 0.20% Put
85 ALTERA CORP 278,100 14,239,000 0.20% Call
86 EXXON MOBIL CORP CALL 170,800 14,211,000 0.20% Call
87 ALLIANCE RES PARTNER L P 568,400 14,187,000 0.20% Call
88 SHIRE PLC 56,900 13,741,000 0.19% Put
89 KKR & CO L P DEL 597,500 13,653,000 0.19% Call
90 STAPLES INC 891,400 13,647,000 0.19% Call
91 PEABODY ENERGY CORP 6,154,300 13,478,000 0.19% Call
92 TARGA RES CORP 151,000 13,472,000 0.19% Put
93 INTEROIL CORP 223,100 13,431,000 0.19% Call
94 ZOETIS INC 275,400 13,280,000 0.19% Put
95 GOPRO INC 251,300 13,249,000 0.19% Call
96 PROSHARES TR 669,200 13,136,000 0.18% Put
97 KRAFT FOODS GROUP INC 152,600 12,992,000 0.18% Put
98 AMBARELLA INC 126,200 12,959,000 0.18% Call
99 YPF SOCIEDAD ANONIMA 471,019 12,920,000 0.18%
100 CONNS INC 316,500 12,565,000 0.18% Call
Page 2 of 97

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0000932540-15-000009, filed 2015.08.11).

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.