 From 2012, Rushmore Reviews now hold a second set of annual meetings in Houston Texas for participants in the Shale Performance Review which continues to grow rapidly, with the notable addition of Chesapeake Energy to the Review in 2014; the second-largest natural gas producer in the United States.On 5 February 2015, Denver based IHS acquired Rushmore Reviews.Participants of the Reviews are provided with secure website access in order to view offset well data.