ROSE Rose Hill Acquisition Corporation

Rosehill Resources Inc. (“Rosehill” or the “Company”) (NASDAQ: ROSE, ROSEW, ROSEU) announced that it plans to release its fourth quarter and full-year 2018 financial and operating results after market close on March 27, 2019 and will host a conference call to discuss those results and updates on March 28, 2019 at 10:00 a.m. Central Time (11:00 a.m. Eastern Time).

Interested parties may participate by dialing (866) 601-1105 from the United States or (430) 775-1347 from outside the United States.  The conference call I.D. number is 6248448.  The call will also be available as a live webcast on the “News/Events” tab of the Investors section of the Company’s website, www.rosehillresources.com. The webcast will be available for replay for at least 30 days.

About Rosehill Resources Inc.

Rosehill Resources Inc. is an oil and gas exploration company with producing assets in Texas and New Mexico with its investment activity focused in the Delaware Basin portion of the Permian Basin. The Company’s strategy for growth includes the organic development of its two core areas in the Northern Delaware Basin and the Southern Delaware Basin, as well as focused acquisitions in the Delaware Basin.

Contact Information:

Craig OwenChief Financial Officer281-675-3400

John CrainSenior Manager, Finance andInvestor Relations281-675-3493