A conference call with management is scheduled at 17:00 ET on 25 October 2018 to review the results and current business conditions. The call will be webcast live over the Internet from www.cloudpeakenergy.com under ‘Investor Relations.’ Participants should follow the instructions provided on the website for downloading and installing the audio applications necessary to join the webcast. Interested individuals also can access the live conference call via telephone at (855) 793-3260 (US) or (631) 485-4929 (international) and entering pass code 9052799.

Following the live webcast, a replay will be available at the same URL on the website for seven days. A telephonic replay will also be available approximately two hours after the call and can be accessed by dialling (855) 859-2056 (US) or (404) 537-3406 (international) and entering pass code 9052799. The telephonic replay will be available for seven days.