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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 (2016Q2)
Original 13F HR (0000932540-16-000023) filed in 2016.08.12
#
Name
Shares
Value ($)
%
Options
Notes
1 ZYNGA INC 321,000 799 0.01% Put
2 ZYNGA INC 869,200 2,164 0.03% Call
3 ZYNGA INC 42,117 105 0.00%
4 ZUMIEZ INC 100 1 0.00% Put
5 ZUMIEZ INC 100 1 0.00%
6 ZOGENIX INC 32,446 261 0.00%
7 ZOGENIX INC 5,100 41 0.00% Put
8 ZOGENIX INC 71,600 576 0.01% Call
9 ZOETIS INC 49,400 2,345 0.03% Call
10 ZOETIS INC 8,286 393 0.00%
11 ZOETIS INC 47,800 2,269 0.03% Put
12 ZOES KITCHEN INC 200 7 0.00% Put
13 ZOES KITCHEN INC 52,000 1,886 0.02% Call
14 ZIOPHARM ONCOLOGY INC 598,400 3,285 0.04% Put
15 ZIOPHARM ONCOLOGY INC 515,800 2,832 0.03% Call
16 ZIOPHARM ONCOLOGY INC 499,776 2,744 0.03%
17 ZIONS BANCORPORATION 83,000 2,086 0.02% Put
18 ZIONS BANCORPORATION 10,100 254 0.00% Call
19 ZIONS BANCORPORATION 6,523 164 0.00%
20 ZION OIL & GAS INC 6,200 9 0.00% Call
21 ZION OIL & GAS INC 4,000 6 0.00% Put
22 ZION OIL & GAS INC 300 0 0.00%
23 ZILLOW GROUP INC 332,000 12,168 0.14% Call
24 ZILLOW GROUP INC 43,400 1,591 0.02% Put
25 ZENDESK INC 8,700 230 0.00% Call
26 ZENDESK INC 25,500 673 0.01% Put
27 ZENDESK INC 20,190 533 0.01%
28 ZELTIQ AESTHETICS INC 6,257 171 0.00%
29 ZELTIQ AESTHETICS INC 15,300 418 0.00% Put
30 ZELTIQ AESTHETICS INC 14,100 385 0.00% Call
31 ZAYO GROUP HLDGS INC 12,800 358 0.00% Call
32 ZAGG INC 4,800 25 0.00% Call
33 ZAFGEN INC COM 142 1 0.00%
34 ZAFGEN INC 1,700 10 0.00% Put
35 ZAFGEN INC 2,800 17 0.00% Call
36 YY INC 255,696 8,660 0.10%
37 YY INC 464,900 15,746 0.19% Call
38 YY INC 411,100 13,924 0.16% Put
39 YUM BRANDS INC 222,400 18,441 0.22% Call
40 YUM BRANDS INC 68,800 5,705 0.07% Put
41 YUM BRANDS INC 67,179 5,570 0.07%
42 YRC WORLDWIDE INC COM PAR .01 49,755 438 0.01%
43 YRC WORLDWIDE INC 51,100 450 0.01% Put
44 YRC WORLDWIDE INC 7,700 68 0.00% Call
45 YPF SOCIEDAD ANONIMA 412,700 7,924 0.09% Call
46 YPF SOCIEDAD ANONIMA 1,016,900 19,524 0.23% Put
47 YPF SOCIEDAD ANONIMA 442,355 8,493 0.10%
48 YINGLI GREEN ENERGY HLDG CO 28,210 115 0.00%
49 YINGLI GREEN ENERGY HLDG CO 11,000 45 0.00% Call
50 YINGLI GREEN ENERGY HLDG CO 23,500 95 0.00% Put
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