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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
301 AMTRUST FINL SVCS INC 37,800 978 0.01% Call
302 AMTRUST FINL SVCS INC 8,600 223 0.00% Put
303 ANACOR PHARMACEUTICALS INC 43,500 2,325 0.03% Put
304 ANACOR PHARMACEUTICALS INC 77,500 4,142 0.06% Call
305 ANACOR PHARMACEUTICALS INC 16,839 900 0.01%
306 ANADARKO PETE CORP 169,400 7,889 0.11% Put
307 ANADARKO PETE CORP 165,900 7,726 0.11% Call
308 ANADARKO PETROLE 57,196 2,664 0.04%
309 ANALOG DEVICES INC 18,100 1,071 0.02% Call
310 ANAVEX LIFE SCIENCES CORP 52,200 256 0.00% Put
311 ANAVEX LIFE SCIENCES CORP 17,866 88 0.00%
312 ANAVEX LIFE SCIENCES CORP 40,300 197 0.00% Call
313 ANGIES LIST INC 9,600 77 0.00% Put
314 ANGIES LIST INC 31,000 250 0.00% Call
315 ANGIES LIST INC COM 64,646 522 0.01%
316 ANGIODYNAMICS INC 1,000 12 0.00% Call
317 ANGLOGOLD ASHANTI LTD 321,000 4,394 0.06% Call
318 ANGLOGOLD ASHANTI LTD 127,000 1,739 0.02% Put
319 ANHEUSER BUSCH INBEV SA/NV 80,500 10,035 0.14% Put
320 ANHEUSER BUSCH INBEV SA/NV 21,300 2,655 0.04% Call
321 ANHEUSER BUSCH INBEV SA/NV 26,706 3,329 0.05%
322 ANI PHARMACEUTICALS INC 6,100 205 0.00% Put
323 ANI PHARMACEUTICALS INC 12,000 404 0.01% Call
324 ANIKA THERAPEUTICS INC 1,000 45 0.00% Put
325 ANIKA THERAPEUTICS INC 11,300 505 0.01% Call
326 ANNALY CAP MGMT INC 8,321 85 0.00%
327 ANNALY CAP MGMT INC 50,400 517 0.01% Put
328 ANNALY CAP MGMT INC 12,800 131 0.00% Call
329 ANTARES PHARMA INC 7,455 6 0.00%
330 ANTERO MIDSTREAM PARTNERS LP 100 2 0.00% Put
331 ANTERO MIDSTREAM PARTNERS LP 1,100 24 0.00% Call
332 ANTERO RES CORP 4,700 117 0.00% Put
333 ANTERO RES CORP 26,400 657 0.01% Call
334 ANTHEM INC 5,400 751 0.01% Call
335 ANTHEM INC 9,200 1,279 0.02% Put
336 ANTHERA PHARMACEUTICALS INC 18,700 68 0.00% Call
337 ANTHERA PHARMACEUTICALS INC 8,200 30 0.00% Put
338 APACHE CORP 26,200 1,279 0.02% Put
339 APACHE CORP 132,400 6,462 0.09% Call
340 APIGEE CORP 500 4 0.00%
341 APOLLO COML REAL EST FIN INC 1,000 16 0.00%
342 APOLLO COML REAL EST FIN INC 1,800 29 0.00% Call
343 APOLLO ED GROUP INC 33,700 277 0.00% Call
344 APOLLO GLOBAL MANAGEMENT - A 147,860 2,531 0.04%
345 APOLLO GLOBAL MGMT LLC 593,500 10,161 0.14% Put
346 APOLLO GLOBAL MGMT LLC 135,600 2,321 0.03% Call
347 APOLLO INVT CORP 5,000 28 0.00% Put
348 APOLLO INVT CORP 17,100 95 0.00% Call
349 APPLIED MATLS INC 6,600 140 0.00% Put
350 APPLIED MATLS INC 11,800 250 0.00% Call
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