IDENT (Title) , In my Individual capacity, AND/OR in my capacity as SOUTHERN TRUST COMPANY, INC. ("Accountholder" and "Principal"), hereby appoint Theta Trading, 1.1C (e.g. Trust/Enoty Nerne and as my Agent(e) to act for me severally arid concurrently In any lawful way with respect to the following Initia

e Bank Alex. Brown Trading Authorization Limited to Purchases and Sales of Securities Account Number: Southern Trust Company, Inc. Account Name: Theta Trading, LLC The undersigned hereby authorizes (whose signature appears beiow) as his or her agent and attorney in fact to buy, seil (inciuding short sale