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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 (2016Q1)
Original 13F HR (0000932540-16-000021) filed in 2016.05.12
#
Name
Shares
Value ($)
%
Options
Notes
1 iPath S&P 500 VIX Short-Term F 40,486 713 0.01%
2 ZYNGA INC 36,122 82 0.00%
3 ZYNGA INC 391,400 892 0.01% Put
4 ZYNGA INC 460,600 1,050 0.01% Call
5 ZUMIEZ INC 200 4 0.00%
6 ZUMIEZ INC 1,500 30 0.00% Call
7 ZUMIEZ INC 700 14 0.00% Put
8 ZOGENIX INC 43,946 406 0.01%
9 ZOGENIX INC 17,400 161 0.00% Put
10 ZOGENIX INC 79,400 734 0.01% Call
11 ZOETIS INC 91,900 4,074 0.06% Call
12 ZOETIS INC 60,400 2,678 0.04% Put
13 ZOES KITCHEN INC 20,500 799 0.01% Put
14 ZOES KITCHEN INC 99,900 3,895 0.05% Call
15 ZIX CORP 9,700 38 0.00% Put
16 ZIOPHARM ONCOLOGY INC 293,800 2,180 0.03%
17 ZIOPHARM ONCOLOGY INC 509,200 3,778 0.05% Call
18 ZIOPHARM ONCOLOGY INC 408,700 3,033 0.04% Put
19 ZIONS BANCORPORATION 61,600 1,491 0.02% Put
20 ZIONS BANCORPORATION 12,100 293 0.00% Call
21 ZIONS BANCORPORATION 6,720 163 0.00%
22 ZION OIL & GAS INC 5,000 9 0.00% Put
23 ZION OIL & GAS INC 4,000 7 0.00% Call
24 ZION OIL & GAS INC 2,600 5 0.00%
25 ZILLOW GROUP INC 8,100 207 0.00% Put
26 ZILLOW GROUP INC 96,200 2,458 0.03% Call
27 ZENDESK INC 7,737 162 0.00%
28 ZENDESK INC 2,600 54 0.00% Call
29 ZENDESK INC 4,600 96 0.00% Put
30 ZELTIQ AESTHETICS INC 23,500 638 0.01% Call
31 ZELTIQ AESTHETICS INC 11,100 301 0.00% Put
32 ZELTIQ AESTHETICS INC 1,921 52 0.00%
33 ZAYO GROUP HLDGS INC 12,800 310 0.00% Call
34 ZAYO GROUP HLDGS INC 4,100 99 0.00% Put
35 ZAGG INCORPORATED 9,022 81 0.00%
36 ZAGG INC 2,100 19 0.00% Call
37 ZAGG INC 19,800 178 0.00% Put
38 ZAFGEN INC COM 3,160 21 0.00%
39 ZAFGEN INC 19,700 132 0.00% Put
40 ZAFGEN INC 77,300 516 0.01% Call
41 YY INC 131,900 8,124 0.11% Call
42 YY INC 109,000 6,713 0.09% Put
43 YUM BRANDS INC 121,000 9,904 0.14% Put
44 YUM BRANDS INC 101,381 8,298 0.12%
45 YUM BRANDS INC 423,000 34,623 0.49% Call
46 YRC WORLDWIDE INC COM PAR .01 60,456 563 0.01%
47 YRC WORLDWIDE INC 30,700 286 0.00% Put
48 YRC WORLDWIDE INC 7,500 70 0.00% Call
49 YPF SOCIEDAD ANONIMA 368,893 6,596 0.09%
50 YPF SOCIEDAD ANONIMA 812,400 14,526 0.21% Put
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