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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 PHOTOMEDEX INC COM PAR $0.01 1,400 1 0.00%
2 FANG HOLDINGS LTD 190,707 1,142 0.02%
3 GOLDEN OCEAN GRP LTD 522 0 0.00%
4 UNIQURE NV SHS 14,000 166 0.00% Put
5 * AIRGAS INC COM 1,100 156 0.00%
6 * ATMEL CORP COM 43,874 356 0.01%
7 * JIAYUAN COM INTL LTD SPONSORED ADR 5,445 41 0.00%
8 * XUEDA ED GROUP SPONSORED ADR 1,400 8 0.00%
9 21VIANET GROUP INC 1,646,500 32,881 0.46% Put
10 21VIANET GROUP INC 731,500 14,608 0.21% Call
11 21VIANET GROUP INC 1,474,439 29,445 0.42%
12 22ND CENTY GROUP INC 30,849 24 0.00%
13 22ND CENTY GROUP INC 79,100 62 0.00% Put
14 2U INC 6,600 149 0.00% Call
15 2U INC 8,000 181 0.00% Put
16 3-D SYS CORP DEL 260,000 4,022 0.06% Put
17 3-D SYS CORP DEL 349,200 5,402 0.08% Call
18 500 COM LTD 228,000 3,808 0.05% Put
19 500 COM LTD 8,900 149 0.00% Call
20 500 COM LTD 53,437 892 0.01%
21 58 COM INC 68,623 3,819 0.05%
22 58 COM INC 140,400 7,813 0.11% Put
23 58 COM INC 52,300 2,911 0.04% Call
24 8POINT3 ENERGY PARTNERS LP 1,900 28 0.00% Call
25 8POINT3 ENERGY PARTNERS LP 2,000 29 0.00% Put
26 8X8 INC NEW 1,000 10 0.00% Call
27 8X8 INC NEW 6,700 67 0.00% Put
28 8X8 INC NEW COM 4,597 46 0.00%
29 A10 NETWORKS INC 5,500 33 0.00% Call
30 AAC HLDGS INC 3,900 77 0.00% Put
31 AAC HLDGS INC 55,000 1,088 0.02% Call
32 AAR CORP 500 12 0.00% Put
33 AARONS INC 7,900 198 0.00% Call
34 AARONS INC 51,300 1,288 0.02% Put
35 ABB LTD 101,800 1,977 0.03% Put
36 ABB LTD 170,100 3,303 0.05% Call
37 ABBOTT LABS 9,200 385 0.01% Call
38 ABBOTT LABS 45,200 1,891 0.03% Put
39 ABBVIE INC 526,100 30,051 0.42% Put
40 ABBVIE INC 186,400 10,647 0.15% Call
41 ABBVIE INC 225,612 12,887 0.18%
42 ABENGOA YIELD PLC 1,100 20 0.00% Call
43 ABERCROMBIE & FITCH CO 15,210 480 0.01%
44 ABERCROMBIE & FITCH CO 28,400 896 0.01% Put
45 ABERCROMBIE & FITCH CO 1,400 44 0.00% Call
46 ABIOMED INC 6,500 616 0.01% Put
47 ABIOMED INC 5,000 474 0.01% Call
48 ABRAXAS PETE CORP 400 0 0.00% Put
49 ABRAXAS PETE CORP 20,300 21 0.00% Call
50 ACACIA RESH CORP 2,291 9 0.00%
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