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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
201 ALLIANCE FIBER OPTIC PRODS INC COM NEW 6,509 96 0.00%
202 ALLIANCE HOLDINGS GP LP 200 3 0.00% Put
203 ALLIANCE ONE INTL INC 2,200 39 0.00% Put
204 ALLIANCE ONE INTL INC 2,200 39 0.00% Call
205 ALLIANCE RES PARTNER L P 2,300 27 0.00% Put
206 ALLIANCE RES PARTNER L P 86,100 1,003 0.01% Call
207 ALLIANCEBERNSTEIN HLDG L P 326 8 0.00%
208 ALLIANCEBERNSTEIN HOLDING LP 18,800 440 0.01% Call
209 ALLIANT ENERGY CORP 1,500 111 0.00% Put
210 ALLIANT ENERGY CORP 1,400 104 0.00% Call
211 ALLSCRIPTS HEALTHCARE SOLUTN 4,600 61 0.00% Put
212 ALLSCRIPTS HEALTHCARE SOLUTN 34,700 458 0.01% Call
213 ALLSCRIPTS HEALTHCARE SOLUTN 2,948 39 0.00%
214 ALLSTATE CORP 5,000 337 0.00% Put
215 ALLSTATE CORP 3,000 202 0.00% Call
216 ALLY FINL INC 322,900 6,045 0.09% Put
217 ALLY FINL INC 219,800 4,115 0.06% Call
218 ALLY FINL INC 99,471 1,862 0.03%
219 ALMOST FAMILY INC 2,600 97 0.00% Put
220 ALNYLAM PHARMACEUTICALS INC 26,000 1,632 0.02% Put
221 ALNYLAM PHARMACEUTICALS INC 41,400 2,599 0.04% Call
222 ALON USA ENERGY INC 2,000 21 0.00% Put
223 ALON USA ENERGY INC 4,000 41 0.00% Call
224 ALON USA ENERGY INC 442 5 0.00%
225 ALON USA PARTNERS LP 7,400 97 0.00% Put
226 ALON USA PARTNERS LP UT LTDPART INT 5,346 70 0.00%
227 ALTISOURCE PORTFOLIO SOLNS S 49,500 1,195 0.02% Call
228 ALTISOURCE PORTFOLIO SOLNS S 5,100 123 0.00% Put
229 ALTISOURCE PORTFOLIO SOLNS S 173 4 0.00%
230 ALTISOURCE RESIDENTIAL CORP 3,100 37 0.00% Put
231 ALTISOURCE RESIDENTIAL CORP 900 11 0.00% Call
232 ALTRIA GROUP INC 59,600 3,735 0.05% Put
233 ALTRIA GROUP INC 12,161 762 0.01%
234 AMAG PHARMACEUTICALS INC 9,300 218 0.00% Put
235 AMAG PHARMACEUTICALS INC 7,810 183 0.00%
236 AMARIN CORP PLC 212,000 324 0.00% Put
237 AMARIN CORP PLC 328,300 502 0.01%
238 AMARIN CORP PLC 85,900 131 0.00% Call
239 AMAYA INC 6,800 91 0.00% Put
240 AMAYA INC 38,900 520 0.01% Call
241 AMBARELLA INC 103,000 4,604 0.06% Put
242 AMBARELLA INC 43,500 1,944 0.03% Call
243 AMBARELLA INC 54,441 2,434 0.03%
244 AMBEV SA 200 1 0.00% Call
245 AMC ENTMT HLDGS INC 100 3 0.00% Put
246 AMC NETWORKS INC CL A 435 28 0.00%
247 AMEDISYS INC 200 10 0.00% Call
248 AMERICA FIRST MULTIFAMILY IN 4,600 24 0.00% Put
249 AMERICA FIRST MULTIFAMILY IN 3,500 18 0.00%
250 AMERICA MOVIL SAB DE CV 152,700 2,371 0.03% Put
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