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 (2014Q4)
Original 13F HR (0000932540-15-000002) filed in 2015.02.11
#
Name
Shares
Value ($)
%
Options
Notes
1 COCA COLA ENTERPRISES INC NE COM 335 15 0.00%
2 EMPIRE RESORTS INC COM NEW 114,861 891 0.01%
3 FUELCELL ENERGY INC COM 203,446 313 0.00%
4 PHOTOMEDEX INC COM PAR $0.01 15,473 24 0.00%
5 REVOLUTION LIGHTING TECHNOLO COM 6,232 8 0.00%
6 BPZ RESOURCES INC 12,778 4 0.00%
7 CLICKSOFTWARE TECHNOLOGIES LTD 5,165 37 0.00%
8 DYAX CORP COM CVR 7,493 105 0.00%
9 EDUCATION RLTY TR INC 466 17 0.00%
10 FANG HOLDINGS LTD 58,466 432 0.01%
11 FRONTLINE LTD ORD 40,580 102 0.00%
12 MTGE INVT CORP 8,053 152 0.00%
13 PEABODY ENERGY CORP 58,767 455 0.01%
14 ParkerVision Inc. (PRKR) 54,145 49 0.00%
15 Williams Partners Lp 1,200 54 0.00%
16 * CHINA MING YANG WIND PWR GRO SPONSORED ADR 34,900 76 0.00%
17 21VIANET GROUP INC 214,300 3,315 0.05% Put
18 21VIANET GROUP INC 112,038 1,733 0.03%
19 21VIANET GROUP INC 58,600 907 0.01% Call
20 22ND CENTY GROUP INC 15,700 26 0.00% Call
21 22ND CENTY GROUP INC 38,024 63 0.00%
22 22ND CENTY GROUP INC 21,900 36 0.00% Put
23 2U INC 1,700 33 0.00% Call
24 3-D SYS CORP DEL 162,509 5,342 0.08%
25 3-D SYS CORP DEL 261,000 8,579 0.13% Call
26 3-D SYS CORP DEL 371,500 12,211 0.18% Put
27 500 COM LTD 6,045 105 0.00%
28 500 COM LTD 10,100 175 0.00% Put
29 58 COM INC 2,692 112 0.00%
30 58 COM INC 16,600 690 0.01% Call
31 58 COM INC 6,500 270 0.00% Put
32 8X8 INC NEW 6,700 61 0.00% Call
33 8X8 INC NEW 2,300 21 0.00% Put
34 A A R Corporation 700 19 0.00%
35 A10 NETWORKS INC 26,000 113 0.00% Put
36 A10 NETWORKS INC 100 0 0.00% Call
37 A10 NETWORKS INC 3,800 17 0.00%
38 AAR CORP 5,700 158 0.00% Call
39 AARONS INC 10,500 321 0.00% Put
40 AARONS INC 2,000 61 0.00% Call
41 ABB LTD 4,300 91 0.00% Put
42 ABB LTD 46,000 973 0.01% Call
43 ABBVIE INC 477,400 31,241 0.47% Put
44 ABBVIE INC 331,400 21,687 0.33% Call
45 ABBVIE INC 107,634 7,044 0.11%
46 ABENGOA YIELD PLC 9,900 270 0.00% Put
47 ABENGOA YIELD PLC 6,800 186 0.00% Call
48 ABRAXAS PETE CORP 43,300 127 0.00% Put
49 ABRAXAS PETE CORP 74,600 219 0.00% Call
50 ABRAXAS PETROLEUM CORP 68,311 201 0.00%
Page 1 of 98