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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
201 FIRST BANCORP P R 400 2 0.00% Call
202 BRIGGS & STRATTON CORP 100 2 0.00% Call
203 CHEGG INC 230 2 0.00%
204 ACCO BRANDS CORPORATION COM 200 2 0.00%
205 M/I HOMES INC 73 2 0.00%
206 CECO ENVIRONMENTAL CORP 100 2 0.00% Call
207 LIGHTINTHEBOX HLDG CO LTD 300 2 0.00% Put
208 LIFELOCK INC 100 2 0.00% Put
209 CTI BIOPHARMA 1,018 2 0.00%
210 KEYW HLDG CORP 200 2 0.00% Call
211 KELLY SVCS INC 100 2 0.00% Put
212 INVESTORS REAL ESTATE TR 200 2 0.00% Call
213 GENIE ENERGY LTD CL B 296 2 0.00%
214 GLADSTONE CAPITAL CORP 200 2 0.00% Call
215 HUANENG POWER INTL INC ADR SPONSORED 42 2 0.00%
216 HONG KONG TELEVISION NETWK L 200 2 0.00% Call
217 HEIDRICK & STRUGGLES INTL IN 100 2 0.00% Put
218 ENLINK MIDSTREAM PARTNERS LP 100 3 0.00% Call
219 CINCINNATI BELL INC NEW 1,000 3 0.00% Put
220 Rubicon Minerals Corp 3,074 3 0.00%
221 FTI CONSULTING INC 85 3 0.00%
222 SLM CORP 300 3 0.00% Put
223 ECLIPSE RES CORP 400 3 0.00% Call
224 VALHI INC NEW 400 3 0.00%
225 SORL AUTO PTS INC 900 3 0.00% Put
226 VERSO CORP 1,000 3 0.00% Put
227 VALHI INC NEW 400 3 0.00% Put
228 SHARPS COMPLIANCE CORP 700 3 0.00% Call
229 ELECTRONICS FOR IMAGING INC 79 3 0.00%
230 APOLLO COML REAL EST FIN INC 200 3 0.00%
231 VEECO INSTRS INC DEL 100 3 0.00% Put
232 SPARK NETWORKS INC 903 3 0.00%
233 ANTHERA PHARMACEUTICALS INC 2,000 3 0.00% Put
234 ODYSSEY MARINE EXPL INC CMN STOCK 2,900 3 0.00% Put
235 NOVA MEASURING INSTRUMENTS L 300 3 0.00% Call
236 GOLDEN STAR RES LTD CDA 14,233 3 0.00%
237 CATALENT INC 100 3 0.00% Put
238 ORAMED PHARM INC 700 3 0.00% Put
239 GRAFTECH INTERNATIONAL LTD 499 3 0.00%
240 GFI GROUP INC 500 3 0.00% Call
241 FELCOR LODGING TR INC 300 3 0.00% Put
242 OUTFRONT MEDIA INC 100 3 0.00% Put
243 OWENS ILL INC 100 3 0.00% Put
244 HEALTHSTREAM INC 100 3 0.00% Call
245 CHINA NEW BORUN CORP 2,200 3 0.00% Call
246 OXIGENE INC 2,000 3 0.00% Put
247 GAFISA ADR RPSG 2 ORD 1,824 3 0.00%
248 PAYLOCITY HLDG CORP 100 3 0.00% Put
249 The Meet Group, Inc. 2,161 3 0.00%
250 AMERICAN HOMES 4 RENT 200 3 0.00% Put
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