Midstates Petroleum Company, Inc. (“Midstates” or the “Company”) (NYSE:MPO) announced today that its first quarter 2012 earnings release will be issued on Wednesday, May 30 after the close of trading on the NYSE. The Company will host a conference call to discuss first quarter results on Thursday, May 31, 2012 at 10:00 a.m. Eastern Time (9:00 a.m. Central Time). Participants may join the conference call by dialing (877) 645-4610 (for U.S. and Canada) or (707) 595-2723 (International). The conference call access code is 79948731 for all participants. To listen via live web cast, please visit the investor relations section of the Company’s website, www.midstatespetroleum.com. An audio replay of the conference call will be available approximately two hours after the conclusion of the call. The audio replay will remain available for seven days until Thursday, June 7, 2012 at 11:59 p.m. Eastern Time (10:59 p.m. Central Time) and can be accessed by dialing (855) 859-2056 (for U.S. and Canada) or (404) 537-3406 (International). The conference call audio replay access code is 79948731 for all participants. The audio replay will also be available in the investor relations section of the Company’s website approximately two hours after the conclusion of the call and remain available for approximately 90 calendar days. About Midstates Petroleum Company, Inc. Midstates Petroleum Company, Inc. is an independent exploration and production company focused on the application of modern drilling and completion techniques to oil-prone resources in previously discovered yet underdeveloped hydrocarbon trends. Founded in 1993, the Company’s operations are currently focused on oilfields in the Upper Gulf Coast Tertiary trend onshore in central Louisiana. Midstates is headquartered in Houston, Texas. Additional information about the Company is available at www.midstatespetroleum.com.