Barton Sterling C.

• 10% owner at GRANT PARK FUTURES FUND LIMITED PARTNERSHIP · on record since Sep 23, 2008
• 10% owner at Ensign Services, Inc. · on record since Jul 9, 2008
• Director at PRTX, INC. · on record since Mar 17, 2009
• SOLE OFFICER at PRTX, INC. · on record since Mar 17, 2009
• 10% owner at PRTX, INC. · on record since Mar 17, 2009