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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 (2015Q1)
Portfolio Summary: 4,755 holdings with a total value of $6,369,518,000.
#
Name
Shares
Value ($)
%
Options
Notes
4751 ACTAVIS PLC 203,900 60,685,000 0.95% Call
4752 SALIX PHARMACEUTICALS INC 516,177 89,201,000 1.40%
4753 ACTAVIS PLC 492,300 146,518,000 2.30% Put
4754 SALIX PHARMACEUTICALS INC 1,183,500 204,521,000 3.21% Put
4755 SALIX PHARMACEUTICALS INC 1,415,400 244,595,000 3.84% Call
Page 96 of 96

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0000932540-15-000007, filed 2015.05.14).

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.