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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 FANG HOLDINGS LTD 587,096 2,953 0.03%
2 GOLDEN OCEAN GRP LTD 522 0 0.00%
3 GRAMMERCY PPTY TRUST 5,814 54 0.00%
4 HSBC HLDGS PLC 65,100 2,038 0.02% Call
5 Mosys Inc (MOSY) 11,500 5 0.00%
6 NATIONAL GEN HLDGS CORP COM 100 2 0.00% Call
7 OSIRIS THERAPEUTICS INC 15,326 78 0.00%
8 UNIQURE NV SHS 2,000 15 0.00% Put
9 21VIANET GROUP INC 555,200 5,669 0.07% Put
10 21VIANET GROUP INC 92,500 944 0.01% Call
11 21VIANET GROUP INC SPONSORED ADR 471,491 4,814 0.06%
12 22ND CENTY GROUP INC 12,400 10 0.00% Call
13 22ND CENTY GROUP INC 100,000 81 0.00% Put
14 22ND CENTY GROUP INCORPORATED 25,248 21 0.00%
15 2U INC 8,900 262 0.00% Put
16 2U INC 38,000 1,118 0.01% Call
17 3-D SYS CORP DEL 267,200 3,658 0.04% Call
18 3-D SYS CORP DEL 171,200 2,344 0.03% Put
19 500 COM LTD 10,400 173 0.00% Put
20 500 COM LTD 3,200 53 0.00% Call
21 500.com Limited 26,002 432 0.01%
22 58 COM INC 90,925 4,173 0.05%
23 58 COM INC 204,800 9,398 0.11% Put
24 58 COM INC 148,200 6,801 0.08% Call
25 8POINT3 ENERGY PARTNERS LP 1,900 30 0.00% Call
26 8POINT3 ENERGY PARTNERS LP 3,015 48 0.00%
27 8POINT3 ENERGY PARTNERS LP 8,300 131 0.00% Put
28 8X8 INC NEW 15,000 219 0.00% Call
29 8X8 INC NEW 5,200 76 0.00% Put
30 A O SMITH 15,004 1,322 0.02%
31 A10 NETWORKS INC 2,100 14 0.00% Call
32 A10 NETWORKS INC 56 0 0.00%
33 A10 NETWORKS INC 4,000 26 0.00% Put
34 AAC HLDGS INC 7,000 160 0.00% Call
35 AAR CORP 500 12 0.00% Put
36 AARONS INC 42,900 939 0.01% Put
37 AARONS INC 1,900 42 0.00% Call
38 ABB LTD 39,000 773 0.01% Put
39 ABB LTD 118,100 2,342 0.03% Call
40 ABBOTT LABS 64,200 2,524 0.03% Put
41 ABBOTT LABS 7,100 279 0.00% Call
42 ABBVIE INC 385,600 23,873 0.28% Call
43 ABBVIE INC 208,753 12,924 0.15%
44 ABBVIE INC 654,800 40,539 0.48% Put
45 ABERCROMBIE & FITCH CO 42,400 755 0.01% Put
46 ABERCROMBIE & FITCH CO 13,536 241 0.00%
47 ABERCROMBIE & FITCH CO 200 4 0.00% Call
48 ABIOMED INC 3,400 372 0.00% Call
49 ABRAXAS PETE CORP 5,200 6 0.00% Call
50 ABRAXAS PETE CORP 3,300 4 0.00% Put
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