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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 (2014Q4)
Original 13F HR (0000932540-15-000002) filed in 2015.02.11
#
Name
Shares
Value ($)
%
Options
Notes
1 ENZON PHARMACEUTICALS INC 100 0 0.00% Put
2 CYTORI THERAPEUTICS INC 300 0 0.00% Put
3 BELLATRIX EXPLORATION LTD 100 0 0.00% Put
4 ENZON PHARMACEUTICALS INC 400 0 0.00% Call
5 COMPUTER PROGRAMS & SYS INC COM 5 0 0.00%
6 OXIGENE INC 100 0 0.00% Call
7 MAST THERAPEUTICS INC COM 253 0 0.00%
8 HUTCHINSON TECHNOLOGY INC 100 0 0.00% Put
9 KEMET CORP 100 0 0.00% Call
10 ENTROPIC COMMUNICA 55 0 0.00%
11 A10 NETWORKS INC 100 0 0.00% Call
12 REVOLUTION LIGHTING TECHNOLOGI 200 0 0.00% Put
13 ASSEMBLY BIOSCIENCES INC 62 0 0.00%
14 CHINA MING YANG WIND PWR GRO 100 0 0.00% Put
15 ASCENT SOLAR TECHNOLOGIES IN 200 0 0.00% Call
16 EXETER RES CORP 500 0 0.00%
17 RHINO RESOURCE PARTNERS LP 100 0 0.00% Put
18 DELCATH SYS INC COM NEW 33 0 0.00%
19 Corinthian Colleges, Inc. 271 0 0.00%
20 RIGEL PHARMACEUTICAL INC 46 0 0.00%
21 HANSEN MEDICAL INC 700 0 0.00%
22 WET SEAL INC 4,500 0 0.00% Put
23 GULF RESOURCES INC 100 0 0.00% Call
24 VISTA GOLD CORP 825 0 0.00%
25 MULTIMEDIA GAMES HLDG CO INC 20,200 0 0.00% Call
26 MULTIMEDIA GAMES HLDG CO INC 150,500 0 0.00% Put
27 MCCLATCHY CO 46 0 0.00%
28 NATIONAL RETAIL PPTYS INC 4 0 0.00%
29 ENDEAVOUR INTL CORP COM NEW 24,286 0 0.00%
30 GAFISA S A 200 0 0.00% Call
31 UQM TECHNOLOGIES INC 100 0 0.00% Put
32 SEVENTY SEVEN ENERGY INC - escrow shares 76 0 0.00%
33 FULL CIRCLE CAP CORP 100 0 0.00% Put
34 ALEXCO RESOURCE CORP 700 0 0.00% Put
35 IMMUNOCELLULAR THERAPEUTICS 300 0 0.00% Put
36 AMERIPRISE FINANCIAL, INC. 8 0 0.00%
37 ACURA PHARMACEUTICALS INC 876 0 0.00%
38 PIKE CORP 10,000 0 0.00% Put
39 PLY GEM HOLDINGS INC 30 0 0.00%
40 AMERICAN EAGLE ENERGY CORP 300 0 0.00% Call
41 GRIFOLS S A SP ADR REP B 7 0 0.00%
42 SUNGY MOBILE LTD 100 0 0.00% Call
43 BSD MED CORP 100 0 0.00%
44 OPLINK COMMUNICATIONS INC 25,800 0 0.00% Call
45 EXETER RES CORP 500 0 0.00% Put
46 Quest Rare Minerals Ltd. 300 0 0.00%
47 CARROLS RESTAURANT GROUP INC 100 1 0.00%
48 PFSWEB INC COM STK 100 1 0.00%
49 BANC OF CALIFORNIA INC 100 1 0.00% Put
50 TRANSATLANTIC PETROLEUM LTD 100 1 0.00% Call
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