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MGM RESORTS INTERNATIONAL® MGM RESORTS INTERNATIONAL REPORTS FIRST QUARTER 2021 FINANCIAL AND OPERATING RESULTS Best quarterly operating results in Las Vegas since reopening • U.S. Regionals achieved record 1Q Adjusted Property EBITDAR and Adjusted Property EBITDAR margins • BetMGM delivered market share gains in the growing U.S. sports betting and iGaming market Exhibit 99.1 Las Vegas , Nevada , April 28 , 2021 – MGM Resorts International ( NYSE : MGM ) ( “ MGM Resorts ” or the “ Company ” ) today reported financial results for the quarter ended March 31 , 2021 . " We are pleased with the meaningful progress we've made on multiple fronts this quarter , ” said Bill Hornbuckle , Chief Executive Officer and President of MGM Resorts International . “ Consumer demand strengthened at our domestic properties , and the significant changes we've made to our operating model have positioned us to capitalize on the recovery . Our regional properties achieved record first quarter Adjusted Property EBITDAR and Adjusted Property EBITDAR margins . Las Vegas operating results improved sequentially , leisure demand is improving , and we now have a tangible path to bring conventions and entertainment back at scale . MGM China continued to outperform the broader Macau market's gradual pace of recovery . " " We are also deeply focused on our long - term goals including investing in digital to drive deeper customer engagement and BetMGM , our U.S. sports betting and iGaming venture , which continues to impress as the leading operator in U.S. iGaming and the top three operator in U.S. online sports betting . Our future is bright . ” “ Our robust liquidity position provides us with significant flexibility amid an improving operational backdrop . As such , we have begun to return capital to shareholders through share repurchases during the first quarter , ” said Jonathan Halkyard , Chief Financial Officer and Treasurer of MGM Resorts . " Going forward , we will be disciplined in allocating our capital by maintaining a strong balance sheet , pursuing targeted growth opportunities and returning cash to shareholders . " First Quarter 2021 Financial Highlights : Consolidated Results Consolidated net revenues of $ 1.6 billion , a decrease of 27 % compared to the prior year quarter . While the prior year quarter was negatively affected by property closures for a portion of the quarter , the current quarter was negatively affected by midweek property and hotel closures , lower business volume and travel activity and ongoing operational restrictions due to the pandemic primarily at its Las Vegas Strip Resorts ; Consolidated operating loss was $ 247 million compared to consolidated operating income of $ 1.3 billion in the prior year quarter , which included a $ 1.5 billion gain related to the MGM Grand Las Vegas and Mandalay Bay real estate transaction ; Net loss attributable to MGM Resorts of $ 332 million compared to net income attributable to MGM Resorts of $ 807 million in the prior year quarter , which included the $ 1.5 billion gain discussed above ; Page 1 of 13