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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 CLEVELAND BIOLABS INC 68 0 0.00%
2 ENERGY FUELS INC 200 0 0.00% Put
3 Aerohive Networks, Inc. 75 0 0.00%
4 REX ENERGY CORPORATION 100 0 0.00% Put
5 AXCELIS TECHNOLOGIES INC 100 0 0.00% Call
6 SYNTA PHARMACEUTICALS CORP 1,500 0 0.00% Put
7 HACKETT GROUP INC 19 0 0.00%
8 CECO ENVIRONMENTAL CORP 40 0 0.00%
9 ABRAXAS PETE CORP 400 0 0.00% Put
10 PRECISION DRILLING CORP 100 0 0.00% Put
11 NAVIOS MARITIME PARTNERS L P 300 0 0.00% Call
12 ImmunoCellular Therapeutics Lt 669 0 0.00%
13 STRATA SKIN SCIENCES INC 1 0 0.00%
14 AZURE MIDSTREAM PARTNERS LP 100 0 0.00% Put
15 NANOSPHERE INC 76 0 0.00%
16 REALNETWORKS INC 100 0 0.00% Call
17 HMS Holding Corp 139 0 0.00%
18 DENISON MINES CORP 141 0 0.00%
19 BANCO SANTANDER BRASIL S A 100 0 0.00%
20 BANRO CORP 1,200 0 0.00%
21 ASSEMBLY BIOSCIENCES INC 1 0 0.00%
22 NORTH EUROPEAN OIL RTY TR SH BEN INT 10 0 0.00%
23 GOLDEN OCEAN GRP LTD 522 0 0.00%
24 COMMUNITY HEALTH SYS INC NEW 36,212 0 0.00%
25 PROSHARES TR 1 0 0.00%
26 GREAT PANTHER SILVER LTD 59 0 0.00%
27 Rubicon Technology 18 0 0.00%
28 INTELSAT S A COM 133 0 0.00%
29 RESOURCE CAPITAL CORP N/C 5/29/18 30068N105 20 0 0.00%
30 STERLING CONSTRUCTION CO INC 67 0 0.00%
31 Anworth Mtg Asset Corp 100 0 0.00%
32 BIOCRYST PHARMACEUTICALS 100 0 0.00% Put
33 INFINITY PHARMACEUTICALS INC 3 0 0.00%
34 PARAMOUNT GOLD NEV CORP 19 0 0.00%
35 CERAGON NETWORKS LTD 11 0 0.00%
36 HONGLI CLEAN ENERGY TECHNOLO 1,327 0 0.00%
37 FAIRWAY GROUP HLDGS CORP 600 0 0.00% Put
38 PROTALIX BIOTHERAPEUTICS INC 366 0 0.00%
39 ALEXCO RESOURCE CORP 122 0 0.00%
40 Key Energy Services, Inc. 368 0 0.00%
41 ROSETTA GENOMICS LTD 100 0 0.00% Put
42 LA JOLLA PHARMACEUTICAL CO 5 0 0.00%
43 SMART TECHNOLOGIES INC 1 0 0.00%
44 NORTHERN DYNASTY MINERALS LTD COM 1,500 0 0.00%
45 UQM TECHNOLOGIES INC COM 752 0 0.00%
46 VERASTEM INC 66 0 0.00%
47 PERNIX THERAPEUTICS HLDGS IN 300 0 0.00%
48 VICAL INC 2,000 1 0.00% Put
49 ARCHROCK INC 100 1 0.00% Put
50 TRINITY BIOTECH PLC 100 1 0.00% Call
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