Alta Mesa Resources, Inc. (Nasdaq: SRUN) is an oil and gas exploration and production company that resulted from the business combination of Silver Run Acquisition Corporation II, a blank-check company sponsored by Riverstone Holdings LLC, with Alta Mesa Holdings and Kingfisher Midstream. Silver Run Acquisition Corporation II completed its IPO in 2017 with a focus on the upstream energy sector. The S-1 registration statement filed with the SEC on February 14, 2018 formally documents the combined public entity, with core operations concentrated in the STACK play of Oklahoma's Anadarko Basin. For comprehensive filings, deal timelines, and SPAC analytics on Alta Mesa Resources and hundreds of other transactions, sign up for full data access at SpacDesk.