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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 (2015Q3)
Portfolio Summary: 4,860 holdings with a total value of $7,233,730,000.
#
Name
Shares
Value ($)
%
Options
Notes
201 AETNA INC NEW 72,700 7,954,000 0.11% Call
202 QIHOO 360 TECHNOLOGY CO LTD CALL 165,600 7,921,000 0.11% Call
203 KKR & CO L P DEL 470,700 7,898,000 0.11% Put
204 TWITTER INC 291,231 7,846,000 0.11%
205 SEAWORLD ENTMT INC 440,200 7,840,000 0.11% Put
206 GENERAL ELECTRIC CO 309,300 7,801,000 0.11% Call
207 58 COM INC 165,500 7,787,000 0.11% Put
208 ARCH COAL INC 2,358,500 7,783,000 0.11% Call
209 GOPRO INC 249,300 7,783,000 0.11% Put
210 ACADIA PHARMACEUTICALS INC 235,000 7,771,000 0.11% Put
211 BRISTOL MYERS SQUIBB CO 130,567 7,730,000 0.11%
212 ALIBABA GROUP HLDG LTD 129,900 7,660,000 0.11% Call
213 RAPTOR PHARMACEUTICAL CORP 1,265,430 7,656,000 0.11%
214 PRECISION CASTPARTS 33,298 7,649,000 0.11%
215 OMNIVISION TECHNOLOGIES INC 290,700 7,634,000 0.11% Put
216 SunEdison Inc 1,056,436 7,585,000 0.10%
217 AVAGO TECHNOLOGIES LTD SHS 60,051 7,507,000 0.10%
218 ZOETIS INC 181,900 7,491,000 0.10% Call
219 BARRICK GOLD CORP 1,174,649 7,471,000 0.10%
220 WAYFAIR INC 212,300 7,443,000 0.10% Call
221 KRAFT HEINZ CO 105,000 7,411,000 0.10% Put
222 CELLDEX THERAPEUTICS INC NEW 701,800 7,397,000 0.10% Put
223 MARKET VECTORS ETF TR GOLD MINER ETF 535,700 7,361,000 0.10% Call
224 DANAHER CORP DEL 86,300 7,354,000 0.10% Put
225 CLOVIS ONCOLOGY INC 79,800 7,338,000 0.10% Call
226 TARGA RES CORP 141,700 7,300,000 0.10% Call
227 TWENTY FIRST CENTY FOX INC 269,700 7,277,000 0.10% Put
228 EXELIXIS INC 1,296,500 7,273,000 0.10% Call
229 LUMBER LIQUIDATORS HLDGS INC 553,200 7,269,000 0.10% Put
230 ILLUMINA INC 41,100 7,226,000 0.10% Put
231 OMNIVISION TECHS INC 273,403 7,180,000 0.10%
232 PLAINS ALL AMERN PIPELINE L 233,800 7,103,000 0.10% Call
233 NIKE INC 57,500 7,071,000 0.10% Put
234 ALLY FINL INC 346,400 7,060,000 0.10% Call
235 BP PLC 230,600 7,047,000 0.10% Call
236 VODAFONE GROUP PLC NEW 222,000 7,046,000 0.10% Call
237 FORTINET INC 165,800 7,043,000 0.10% Call
238 BLACKSTONE GROUP L P 221,900 7,028,000 0.10% Put
239 MICRON TECHNOLOGY INC 468,500 7,018,000 0.10% Put
240 STARWOOD HOTELS&RESORTS WRLD 104,700 6,960,000 0.10% Call
241 TYSON FOODS INC 161,100 6,943,000 0.10% Put
242 JPMORGAN CHASE & CO 113,700 6,932,000 0.10% Call
243 BLOCK H & R INC 190,500 6,896,000 0.10% Call
244 CTRIP COM INTL LTD 109,100 6,893,000 0.10% Put
245 MARKET VECTORS ETF TR GOLD MINER ETF 501,000 6,884,000 0.10% Put
246 LAREDO PETROLEUM INC 727,900 6,864,000 0.09% Call
247 ANHEUSER BUSCH INBEV SA/NV 64,230 6,829,000 0.09%
248 MENS WEARHOUSE INC 160,200 6,812,000 0.09% Call
249 BIOMARIN PHARMACEUTICAL INC 64,523 6,796,000 0.09%
250 YUM BRANDS INC 84,100 6,724,000 0.09% Call
Page 5 of 98

Portfolio data is normalized using SEC Form 13F filings, including the Restatement filing (0000932540-15-000015, filed 2015.11.20).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.