GROUP ONE TRADING, L.P.

Q1 2016 13F Holdings Report, Options Holdings

Signature - Title
Chad Grosam - Chief Financial Officer
Location
Chicago, IL
Options holdings as of
March 31, 2016
Notional value $
$6.14B
Number of holdings
3,339
Date filed
5/11/2016, 05:40 PM
Description
All US holdings of this investor are reported in this report.
Previous filing
Q4 2015 - Feb 11, 2016
Stock holdings
Showing options holdings, see here for stock holdings
Sym Company Class Option Share Change Activity * Price $ Shares Notional Value
Filing 2016 Q1 compared to 2015 Q4 by default.
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.

Person Signing this Report on Behalf of Reporting Manager:

Name Title City, State Date
CHAD GROSAM CHIEF FINANCIAL OFFICER Chicago, Illinois 5/11/2016