Dark
Light
System
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 PHOTOMEDEX INC COM PAR $0.01 1,400 0 0.00%
2 FANG HOLDINGS LTD 587,096 2,953 0.03%
3 GOLDEN OCEAN GRP LTD 522 0 0.00%
4 HSBC HLDGS PLC 65,100 2,038 0.02% Call
5 NATIONAL GEN HLDGS CORP COM 100 2 0.00% Call
6 UNIQURE NV SHS 2,000 15 0.00% Put
7 21VIANET GROUP INC 471,491 4,814 0.06%
8 21VIANET GROUP INC 92,500 944 0.01% Call
9 21VIANET GROUP INC 555,200 5,669 0.07% Put
10 22ND CENTY GROUP INC 12,400 10 0.00% Call
11 22ND CENTY GROUP INC 25,248 21 0.00%
12 22ND CENTY GROUP INC 100,000 81 0.00% Put
13 2U INC 38,000 1,118 0.01% Call
14 2U INC 8,900 262 0.00% Put
15 3-D SYS CORP DEL 267,200 3,658 0.04% Call
16 3-D SYS CORP DEL 171,200 2,344 0.03% Put
17 500 COM LTD 26,002 432 0.01%
18 500 COM LTD 10,400 173 0.00% Put
19 500 COM LTD 3,200 53 0.00% Call
20 58 COM INC 90,925 4,173 0.05%
21 58 COM INC 204,800 9,398 0.11% Put
22 58 COM INC 148,200 6,801 0.08% Call
23 8POINT3 ENERGY PARTNERS LP 3,015 48 0.00%
24 8POINT3 ENERGY PARTNERS LP 8,300 131 0.00% Put
25 8POINT3 ENERGY PARTNERS LP 1,900 30 0.00% Call
26 8X8 INC NEW 15,000 219 0.00% Call
27 8X8 INC NEW 5,200 76 0.00% Put
28 A O SMITH 15,004 1,322 0.02%
29 A10 NETWORKS INC 4,000 26 0.00% Put
30 A10 NETWORKS INC 56 0 0.00%
31 A10 NETWORKS INC 2,100 14 0.00% Call
32 AAC HLDGS INC 7,000 160 0.00% Call
33 AAR CORP 500 12 0.00% Put
34 AARONS INC 1,900 42 0.00% Call
35 AARONS INC 42,900 939 0.01% Put
36 ABB LTD 39,000 773 0.01% Put
37 ABB LTD 118,100 2,342 0.03% Call
38 ABBOTT LABS 64,200 2,524 0.03% Put
39 ABBOTT LABS 7,100 279 0.00% Call
40 ABBVIE INC 208,753 12,924 0.15%
41 ABBVIE INC 385,600 23,873 0.28% Call
42 ABBVIE INC 654,800 40,539 0.48% Put
43 ABERCROMBIE & FITCH CO 13,536 241 0.00%
44 ABERCROMBIE & FITCH CO 200 4 0.00% Call
45 ABERCROMBIE & FITCH CO 42,400 755 0.01% Put
46 ABIOMED INC 3,400 372 0.00% Call
47 ABRAXAS PETE CORP 3,300 4 0.00% Put
48 ABRAXAS PETE CORP 5,200 6 0.00% Call
49 ACACIA COMMUNICATIONS INC 900 36 0.00% Call
50 ACACIA COMMUNICATIONS INC 6,576 263 0.00%
Page 1 of 93